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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of
the Securities Exchange Act of 1934 (Amendment No. 1)

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January 18, 2013

Dear Stockholder:

        I am pleased to invite you to attend our 2013 Annual Meeting of Stockholders on Thursday, February 28, 2013, at 2:00 p.m., Eastern Time. The meeting will be held at The Ritz Carlton, 280 Vanderbilt Beach Road, Naples, Florida.

        The Notice of the 2013 Annual Meeting of Stockholders and the Proxy Statement describe the items of business for the meeting. At the meeting we will also report on AmerisourceBergen's performance and operations during fiscal year 2012 and respond to stockholder questions.

        Your vote is very important. Whether or not you plan to attend the 2013 Annual Meeting of Stockholders, we urge you to vote and to submit your proxy over the Internet, by telephone or by mail. If you are a registered stockholder and attend the meeting, you may revoke your proxy and vote your shares in person. If you hold your shares through a bank or broker and want to vote your shares in person at the meeting, please contact your bank or broker to obtain a legal proxy.

        Thank you for your support.

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January 18, 2013

AmerisourceBergen Corporation
1300 Morris Drive
Chesterbrook, PA 19087

PROXY STATEMENT

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ABOUT THE 2013 ANNUAL MEETING OF STOCKHOLDERS AND VOTING AT THE MEETING

Why am I being furnished this Proxy Statement?

        This Proxy Statement is furnished by AmerisourceBergen's Board of Directors in connection with its solicitation of proxies for use at the 2013 Annual Meeting of Stockholders to be held on February 28, 2013, and at any adjournments thereof. Our Annual Report on Form 10-K for the fiscal year ended September 30, 2012 accompanies this Notice and Proxy Statement, but is not incorporated as a part of the Proxy Statement and is not to be regarded as part of the proxy solicitation material.

What are the items of business for the meeting?

        The items of business for the meeting are as follows:

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To elect the eight nominees named in the Proxy Statement (or, if necessary, any substitute nominees selected by the Board of Directors) as a director, each to serve until the 2014 Annual Meeting of Stockholders and until his or her successor is duly elected and qualified;



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To ratify the appointment of Ernst & Young LLP as AmerisourceBergen's independent registered public accounting firm for fiscal year 2013;



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To conduct an advisory vote to approve the compensation of our named executive officers; and



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To transact any other business properly coming before the meeting.

Who is soliciting my proxy?

        The Board of Directors is soliciting your proxy in order to provide you with an opportunity to vote on all matters scheduled to come before the meeting whether or not you attend the meeting in person.

What if I received a Notice of Internet Availability of Proxy Materials?

        We are providing access to our proxy materials over the Internet. Accordingly, on or about January 18, 2013, we are mailing to our record and beneficial stockholders a Notice of Internet Availability of Proxy Materials, which contains instructions on how to access our proxy materials over the Internet and vote online. If you received a Notice of Internet Availability of Proxy Materials, you will not receive a printed copy of our proxy materials by mail unless you request one. You may request a printed copy of our proxy materials for the 2013 Annual Meeting of Stockholders. If you wish to receive a printed copy of our proxy materials, you should follow the instructions for requesting those materials included in the Notice of Internet Availability of Proxy Materials.

Who is entitled to vote?

        You may vote if you owned shares of our common stock as of the close of business on January 2, 2013, which is the record date. You are entitled to one vote for each share of common stock that you own. As of January 2, 2013, we had 230,746,566 shares of common stock outstanding.

What shares can I vote?

        You may vote all shares owned by you as of the close of business on January 2, 2013, the record date. These shares include:

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Shares held directly in your name as the stockholder of record.



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Shares of which you are the beneficial owner but not the stockholder of record. These are shares that are held for you through a broker, trustee or other nominee such as a bank, including shares purchased through any 401(k) plan or our employee stock purchase plan.

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How do I vote before the meeting?

        If you hold your shares in your own name as the stockholder of record, you have three options for voting and submitting your proxy before the meeting:

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By Internet — We encourage you to vote and submit your proxy over the Internet at www.investorvote.com/abc.



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By telephone — You may vote and submit your proxy by calling 1-800-652-VOTE (8683).



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By mail — If you received your proxy materials by mail, you may vote by completing, signing and returning the enclosed proxy card.

        If you hold your shares through an account with a bank, broker or other nominee, you may vote by completing and signing the voting instruction form that the bank, broker or other nominee will provide to you, or by using telephone or Internet voting arrangements described on the voting instruction form, the Notice or other materials that the bank, broker or other nominee will provide to you.

May I vote at the meeting?

        You may vote your shares at the meeting if you attend in person. If you hold your shares through an account with a bank or broker, you must obtain a legal proxy from the bank or broker in order to vote at the meeting.

        Even if you plan to attend the meeting, we encourage you to vote your shares by proxy. You may vote by proxy over the Internet, by telephone or by mail.

How do I revoke my proxy?

        If you are the stockholder of record, you may revoke your proxy at any time before the polls close at the meeting. You may revoke your proxy by:

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Changing your vote in the manner described below.



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Notifying Kathy H. Gaddes, Secretary, AmerisourceBergen Corporation, 1300 Morris Drive, Chesterbrook, Pennsylvania 19087 in writing that you are revoking your proxy before it is voted at the meeting.

        If you hold your shares through an account with a bank or broker, your ability to revoke your proxy depends on the voting procedures of the bank or broker. Please follow the directions provided to you by your bank or broker.

May I change my vote?

        You may change your vote at any time before the polls close at the meeting. You may change your vote by:

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Signing another proxy card with a later date and returning it to us prior to the meeting.



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Voting again over the Internet or by telephone prior to 2:00 p.m., Eastern Time, on February 28, 2013.



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Voting at the meeting if you are the stockholder of record.



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Voting at the meeting if you are the beneficial owner and have obtained a legal proxy from your bank or broker.

What if I return my proxy card but do not provide voting instructions?

        Proxy cards that are signed and returned but do not contain instructions will be voted as follows:

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For the election of the eight nominees for director named on page 5 of this Proxy Statement;



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For the ratification of the appointment of Ernst & Young LLP as our independent registered public accounting firm for fiscal year 2013;



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For the approval of the compensation of our named executive officers as described in this Proxy Statement; and



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In accordance with the best judgment of the individuals named as proxies on the proxy card on any other matters properly brought before the meeting.

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What does it mean if I receive more than one proxy card or instruction form?

        It means that you have multiple accounts with our transfer agent and/or banks or brokers. Please vote all of your shares.

        We recommend that you consolidate as many accounts as possible under the same name and address. For assistance consolidating accounts where you are the stockholder of record, you may contact our transfer agent, Computershare, at 1-866-233-1957.

Will my shares be voted if I do not provide my proxy?

        If you are a registered stockholder and do not provide a proxy, you must attend the meeting in order to vote your shares.

        If you hold shares through an account with a bank or broker, your shares may be voted even if you do not provide voting instructions to your bank or broker. Banks and brokers have the authority under the rules of the New York Stock Exchange, or NYSE, to vote shares for which their customers do not provide voting instructions on certain routine matters. The ratification of the appointment of our independent registered public accounting firm (Item 2 on the Proxy Card) is considered a routine matter for which banks and brokers may vote without specific instructions from their customers.

May stockholders ask questions at the meeting?

        Yes. Representatives of AmerisourceBergen will answer stockholders' questions of general interest at the end of the meeting. In order to be eligible to ask questions at the meeting, you must be able to establish that you are a stockholder either as of January 2, 2013 or as of the date of the meeting.

How many votes must be present to hold the meeting?

        In order for us to conduct our meeting, a majority of the shares of our common stock outstanding as of January 2, 2013 must be present in person or by proxy at the meeting. This is referred to as a quorum. Your shares are counted as present at the meeting if you attend the meeting and vote in person or if you properly return a proxy over the Internet, by telephone or by mail. Shares voted by banks or brokers on behalf of beneficial owners also are counted as present at the meeting. In addition, abstentions and broker non-votes will be counted for purposes of establishing a quorum with respect to any matter properly brought before the meeting. Broker non-votes occur on a matter when a bank or broker is not permitted under applicable rules and regulations to vote on a matter without instruction from the beneficial owner of the underlying shares and no instruction has been given.

How many votes are needed for each proposal and how are the votes counted?

        The favorable vote of a majority of the votes cast will be required for the election of each director (Item 1 on the Proxy Card).

        A majority of the votes cast means that the votes cast "for" a director exceed the number of votes cast "against" that director. Abstentions and broker non-votes are disregarded when determining if a majority of the votes have been cast in favor of a director.

        The favorable vote of a majority of the shares present in person or by proxy and entitled to vote will be required for:

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The ratification of the appointment of Ernst & Young LLP as our independent registered public accounting firm for the current fiscal year (Item 2 on the Proxy Card);



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The approval, on an advisory basis, of the compensation of our named executive officers as described in this Proxy Statement (Item 3 on the Proxy Card); and



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Any other proposal that might properly come before the meeting.

        Abstentions will be counted toward the tabulation of votes cast on Items 2 and 3, and will have the effect of negative votes. Under NYSE rules, Item 2 is considered a routine matter on which brokers will be permitted to vote in their discretion even if the beneficial owners do not provide voting instructions. However, Item 3 is not considered a

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routine matter under NYSE rules, and brokers will not be permitted to vote on Item 3 if the beneficial owners fail to provide voting instructions.

How will proxies be voted on other items or matters that properly come before the meeting?

        If any other items or matters properly come before the meeting, the proxies received will be voted on those items or matters in accordance with the discretion of the proxy holders.

Is AmerisourceBergen aware of any other item of business that will be presented at the meeting?

        We are not aware of any other business to be presented at the 2013 Annual Meeting of Stockholders. However, if any other matter should properly come before the 2013 Annual Meeting of Stockholders, the enclosed proxy confers discretionary authority with respect to such matter.

Will there be any further solicitation of proxies for the meeting?

        Our directors, officers and employees may solicit proxies by telephone or in person. In addition, we have hired Morrow & Co., LLC to assist us in soliciting proxies, if necessary. Morrow may solicit proxies by telephone or in person. We will pay Morrow a fee of $10,000, plus expenses, for providing such services. All costs and expenses of any solicitation, including the cost of preparing this Proxy Statement and posting it on the Internet and mailing the Notice of Internet Availability of Proxy Materials, will be borne by AmerisourceBergen.

Will AmerisourceBergen reimburse any expenses of banks, brokers, nominees and fiduciaries?

        We will reimburse the expenses of banks, brokers, nominees and fiduciaries that send notices, proxies and proxy materials to our stockholders.

Will the directors be in attendance at the meeting?

        We currently expect all of our directors to be in attendance at the 2013 Annual Meeting of Stockholders. It has been customary for our directors to attend our annual meetings. All of our directors attended the 2012 Annual Meeting of Stockholders.

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ELECTION OF DIRECTORS
(Item 1 on the Proxy Card)

How often are directors elected?

        At our 2011 Annual Meeting of Stockholders, our stockholders approved an amendment to our Amended and Restated Certificate of Incorporation to phase out the classification of our Board and provide for the annual election of directors. As a result, any nominee who is elected to serve as a director at our 2013 Annual Meeting of Stockholders and in the future will be elected to serve a term of one year. Similarly, any director who is appointed to fill a vacancy on the Board will serve until the next annual meeting of stockholders after his or her appointment and until his or her successor is elected and qualified. However, because our Board was previously classified into three classes of directors, certain directors were elected to and are currently serving three-year terms of office. These directors (designated as the Class I directors) will continue to serve as directors until the earlier of their resignation or the expiration of their terms. Beginning with the 2014 Annual Meeting of Stockholders, our entire Board of Directors will be subject to annual elections.

How many directors are to be elected at this meeting?

        There are eight directors nominated for election at the 2013 Annual Meeting of Stockholders.

What is the size of the Board of Directors?

        The size of the Board of Directors is ten.

Who are this year's nominees?

        Mr. Collis, Mr. Conant, Mr. Gochnauer, Mr. Gozon, Mr. Hagenlocker, Ms. Hyle, Mr. Long and Mr. McGee will stand for re-election.

Which of this year's nominees are independent?

        Mr. Conant, Mr. Gochnauer, Mr. Gozon, Mr. Hagenlocker, Ms. Hyle, Mr. Long and Mr. McGee are independent (as independence is defined in Section 303A of the NYSE Listed Company Manual and in our corporate governance principles).

What is the term of office for which this year's nominees are to be elected?

        The nominees are to be elected for a term of one year and are expected to hold office until the 2014 Annual Meeting of Stockholders and until their successors are elected and qualified.

What if a nominee is unwilling or unable to serve?

        Each nominee for director has consented to his or her nomination and, so far as the Board of Directors and management are aware, intends to serve a full term as a director if elected. However, if any of the nominees should become unavailable or unable to stand for election prior to the election, the shares represented by proxies may be voted for the election of substitute nominees selected by the Board of Directors.

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Biographical information about our nominees:

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How does the Board of Directors recommend that I vote?

        We recommend that you vote For the election of each of the eight nominees named in this Proxy Statement to the Board of Directors.

ADDITIONAL INFORMATION ABOUT THE DIRECTORS, THE BOARD
AND THE BOARD COMMITTEES

Who are the directors whose terms of office do not expire at the 2013 Annual Meeting of Stockholders?

        Charles H. Cotros and Jane E. Henney, M.D. are currently serving as directors of AmerisourceBergen and their terms of office expire at the 2014 Annual Meeting of Stockholders.

Biographical information about our other directors:

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Are there any family relationships among AmerisourceBergen's directors and executive officers?

        No.

What are the committees of the Board of Directors?

        The Board of Directors has five standing committees: the Audit and Corporate Responsibility Committee, the Compensation and Succession Planning Committee, the Executive Committee, the Finance Committee and the Governance and Nominating Committee.

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        Identified below are the members of the current Board committees along with the duties and responsibilities of each committee:

Duties and Responsibilities of the Board Committees

Audit and Corporate Responsibility Committee

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Appoints, and has authority to terminate, the company's independent registered public accounting firm.



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Pre-approves all audit and permitted non-audit services provided by the company's independent registered public accounting firm, including the scope of the audit and audit procedures.



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Reviews and discusses the independence of the company's independent registered public accounting firm.



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Reviews and discusses with management and the company's independent registered public accounting firm the company's audited financial statements and interim quarterly financial statements as well as management's discussion and analysis of the statements as set forth in Forms 10-K and 10-Q filed with the SEC.



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Prepares the audit committee report as required by SEC rules.



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Discusses with management and/or the company's independent registered public accounting firm significant financial reporting issues and accounting issues and the adequacy of our internal control over financial reporting.



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Inquires of management, the internal auditor and the company's independent registered public accounting firm about significant risks or exposures (whether financial, operational or otherwise) and assesses the steps management has taken to control such risks or exposures, including policies implemented for such purposes.



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Reviews internal audit function, internal audit plans, internal audit reports and management's response to such reports.



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Reviews the appointment, performance and replacement of our chief audit executive.



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Oversees the development and implementation by management of an enterprise risk management program.



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Reviews and approves all related persons transactions in accordance with our Related Persons Transactions Policy.



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Oversees compliance with our Code of Ethics and Business Conduct.

Compensation and Succession Planning Committee

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Reviews and approves AmerisourceBergen's executive compensation strategy and the individual elements of total compensation for the President and Chief Executive Officer and other members of executive and senior management.

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•

Evaluates performance of management annually.



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Ensures that executive compensation strategy supports stockholder interests.



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Reviews and discusses with management the Compensation Discussion and Analysis and other disclosures about executive compensation that are required to be included in our Proxy Statement and Annual Report on Form 10-K.



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Prepares a compensation committee report as required by SEC rules.



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Administers and makes awards under our incentive compensation plans, including stock option plans.



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Has sole authority for retaining and terminating any consulting firm used to assist in the evaluation of the compensation of the Chief Executive Officer or any other executive officer and ensuring the independence of such consulting firm.



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Monitors the activities of our internal Benefits Committee, including the Benefits Committee's oversight of the administration and investment performance of our pension and retirement plans.



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Oversees the administration of our health and welfare benefit plans.



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Reviews with management and makes recommendations relating to succession planning and management development.

Executive Committee

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Exercises the authority of the Board of Directors between regularly scheduled meetings of the Board on matters that cannot be delayed, except as limited by Delaware law and our bylaws.

Finance Committee

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Provides oversight of our capital structure and other issues of financial significance to the company.



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Reviews the asset and liability structure of the company and considers its funding and capital needs.



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Reviews proposed financing plans, credit facilities and other financing transactions.



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Reviews our dividend policy.



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Reviews any proposed issuance or sale of our stock, stock repurchases or redemptions and stock splits.



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Reviews financial strategies developed by management to meet changing economic and market conditions.



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Reviews proposed major capital expenditures or commitments.



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Reviews proposed material acquisitions, divestitures, joint ventures and other transactions involving the company.

Governance and Nominating Committee

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Recommends selection and qualification criteria for directors and committee members.



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Identifies and recommends qualified candidates to serve as directors of the company.



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Considers nominees for director recommended by stockholders.



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Reviews and makes recommendations relating to succession planning for Board and Board committee leadership positions and prepares for Board vacancies.



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Oversees orientation of directors and continuing education of directors in areas related to the work of the Board and the directors' Committee assignments.



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Makes recommendations regarding the size and composition of the Board and the composition and responsibilities of Board committees.



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Oversees the evaluation of the Board and the Board Committees.

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Reviews and makes recommendations to the Board regarding director compensation.



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Has sole authority for retaining and terminating any consulting firm used to assist in the evaluation of the compensation of directors and ensuring the independence of such consulting firm.



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Reviews and makes recommendations to the Board about the company's corporate governance.

How often did the Board and the committees meet in fiscal year 2012?

        During fiscal year 2012, the Board of Directors met 7 times; the Audit and Corporate Responsibility Committee met 10 times; the Compensation and Succession Planning Committee met 4 times; the Finance Committee met 4 times; and the Governance and Nominating Committee met 4 times. The Executive Committee did not meet.

Did each director attend at least 75% of the meetings of the Board of Directors and of the committees on which he or she served?

        Yes.

Do the non-management directors meet regularly?

        The non-management directors meet at or near the end of each regularly scheduled meeting of the Board of Directors. The Chairman of the Board of Directors presides at such meetings. If the Chairman is not present, the committee chairs preside on a rotating basis.

How do interested parties make their concerns known to the non-management directors?

        Interested parties who wish to make any concerns known to the non-management directors may submit communications at any time in writing to: Kathy H. Gaddes, Secretary, AmerisourceBergen Corporation, 1300 Morris Drive, Chesterbrook, Pennsylvania 19087. AmerisourceBergen's Secretary will determine, in her good faith judgment, which communications will be relayed to the non-management directors.

How are directors compensated?

        The following table summarizes the total compensation earned by directors who were not employees of AmerisourceBergen during fiscal year 2012. Directors who are employees of AmerisourceBergen receive no compensation for their service as directors or as members of Board committees.

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(4)

These amounts represent annual equity awards earned by directors for Board service in fiscal year 2012 and equity issued, at the director's election, in lieu of the director's annual retainer. At the director's election, the annual equity award is issued in the form of restricted stock or restricted stock units that vest three years after the grant date. The 2012 annual equity award had a grant date value of $125,000 (or, for the Chairman of the Board, $175,000). At the director's election, amounts of a director's foregone annual retainer will be issued in fully vested shares of our common stock or fully vested restricted stock units, in each case delivered in quarterly increments generally on November 1, February 1, May 1 and August 1 of each fiscal year. As of September 30, 2012, each of the non-employee directors held the following shares of outstanding restricted stock and restricted stock units: Mr. Conant — 0; Mr. Cotros — 5,965; Mr. Gochnauer — 8,425; Mr. Gozon — 4,692; Mr. Hagenlocker — 3,351; Dr. Henney — 8,425; Ms. Hyle — 8,415; Mr. Long — 8,425; and Mr. McGee — 8,425.

(5)

No stock options were granted to directors in fiscal year 2012. As of September 30, 2012, the following non-employee directors held outstanding stock options as follows: Mr. Conant — 0; Mr. Cotros — 24,341; Mr. Gochnauer — 52,541; Mr. Gozon — 134,317; Mr. Hagenlocker — 76,567; Dr. Henney — 39,677; Ms. Hyle — 19,932; Mr. Long — 15,170; and Mr. McGee — 82,732.

(6)

These amounts represent the dividends accrued and paid on restricted stock that vested in fiscal 2012. In addition, the amount shown for Mr. Cotros also includes the value of prescription drug benefits provided to Mr. Cotros and his spouse during fiscal year 2012.

        Director Fees.    In November 2011, the Board of Directors approved a new compensation policy for non-employee directors of AmerisourceBergen to more closely align our director pay with the median of our peer group and leading practices in corporate governance. The policy became effective on January 1, 2012. We have simplified our director compensation program by providing for an annual cash retainer plus an annual equity award of restricted stock or restricted stock units. Under the new director compensation program, we eliminated meeting fees and stock option awards to non-employee directors. Consistent with our overall compensation philosophy, the new compensation program for non-employee directors provides total direct compensation (cash retainer and equity award) in the 50th percentile of our peer group. (See page 27 for a description of our peer group.) The stock ownership requirements for non-employee directors remain the same.

        Annual Retainers.    The Chairman of the Board is entitled to receive an annual retainer of $150,000, and each other non-employee director is entitled to receive an annual retainer of $100,000. The Chair of each of the standing committees (other than the Chair of the Executive Committee) is entitled to receive an additional annual retainer as follows: Chair of the Audit and Corporate Responsibility Committee — $20,000; Chair of the Compensation and Succession Planning Committee — $15,000; Chair of the Finance Committee — $10,000; and Chair of the Governance and Nominating Committee — $10,000. As explained below, a director may elect to have the annual retainer paid in cash, restricted stock or restricted stock units or credited to a deferred compensation account. Payment of annual retainers in cash will be made in equal quarterly installments in advance. In addition, we provide our directors with a prescription drug benefit and reimburse them for the cost of education programs, transportation, food and lodging in connection with their service as directors.

        Annual Equity Awards.    On March 1, 2012, each of the non-employee directors (excluding Mr. Conant who joined the Board in January 2013) received an annual grant of restricted stock or restricted stock units having a fair value of $125,000, except the Chairman of the Board who received restricted stock units having a fair market value of $175,000. Each director may elect to receive restricted stock or restricted stock units in advance of the grant date. The vesting period for these awards is three years from the date of grant (the date of the last Annual Meeting of Stockholders), subject to continued service on the Board or following retirement by a director aged 62 with five years of continuous service on the Board. These grants were made under the AmerisourceBergen Corporation Equity Incentive Plan. A director may defer settlement of shares payable with respect to restricted stock units as described below.

        Deferral and Other Arrangements.    Directors have the option to elect to defer all or any part of the annual retainer and to credit the deferred amount to an account under the AmerisourceBergen Corporation 2001 Deferred Compensation Plan. Payment of deferred amounts will be made or begin on the first day of the month after the non-employee director ceases to serve as a director. A director may elect to receive the deferred benefit (i) over annual periods ranging from three to fifteen years and payable in quarterly installments or (ii) in a single distribution. We pay all costs and expenses incurred in the administration of the deferred compensation plan. During fiscal year 2012, directors were also given the option to elect to forego 50% or more of their annual cash retainers and receive either fully vested shares of our common stock or fully vested restricted stock units having a fair market value equal to the amount of the foregone compensation. All shares or restricted stock units received in lieu of retainers will be issued under the AmerisourceBergen Corporation Equity Incentive Plan. In addition, during fiscal year 2012, directors were given the option to defer settlement of any shares payable with respect to any restricted stock units (and any dividend equivalents) received either in lieu of the annual retainer or as the annual equity award to a later date.

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        Stock Ownership Guidelines.    We require our non-employee directors to own shares of our common stock to align their interests with those of the stockholders and to provide an incentive to foster our long-term success. In the first, second, third and fourth years after their election to the Board, non-employee directors must own stock equal in value to one, two, three or four times the annual retainer, respectively. From and after the fifth year following their Board election, non-employee directors must own stock equal in value to at least five times the annual retainer. We may take unusual market conditions into consideration when assessing compliance.

CODES OF ETHICS

Has AmerisourceBergen adopted a code of ethics and business conduct that applies to directors, officers and employees?

        The Board of Directors adopted the AmerisourceBergen Corporation Code of Ethics and Business Conduct in May 2004. We review and revise the Code of Ethics and Business Conduct from time to time, most recently in January 2013. It applies to directors and employees, including officers, and is intended to comply with the requirements of Section 303A.10 of the NYSE Listed Company Manual.

        Any waivers of the application of the AmerisourceBergen Corporation Code of Ethics and Business Conduct to directors or executive officers must be approved by either the Board of Directors or the Audit and Corporate Responsibility Committee. We will disclose any such waiver or amendment of the Code of Ethics and Business Conduct promptly on our website.

Has AmerisourceBergen adopted a code of ethics for the principal executive officer and principal financial and accounting officers of AmerisourceBergen as required by SEC regulations?

        We have adopted the AmerisourceBergen Corporation Code of Ethics for Designated Senior Officers in accordance with Item 406 of the SEC's Regulation S-K. It applies to our President and Chief Executive Officer, Senior Vice President and Chief Financial Officer and Vice President and Corporate Controller. Any waiver or amendment of the AmerisourceBergen Corporation Code of Ethics for Designated Senior Officers will be disclosed promptly on our website.

Where can stockholders obtain copies of the codes of ethics?

        We have posted both the AmerisourceBergen Corporation Code of Ethics and Business Conduct and the AmerisourceBergen Corporation Code of Ethics for Designated Senior Officers under the Investors section of our Internet website at www.amerisourcebergen.com. A copy of the AmerisourceBergen Corporation Code of Ethics for Designated Senior Officers has also been filed with the SEC as an exhibit to our annual reports filed under the Securities Exchange Act of 1934, as amended.

CORPORATE GOVERNANCE

What is our leadership structure?

        Our executive officers, managers and employees conduct our business under the direction of our Chief Executive Officer and with the independent oversight of our Board. To enhance its oversight function, our Board is composed of directors who are not employed by us, with the exception of Mr. Collis. A non-executive director serves as Chairman of the Board. At each regularly scheduled Board meeting, our non-employee directors meet in executive session without management present. Our Board provides guidance and critical review of our strategic initiatives, business plan and risk management processes. Our Board also ensures that we have an effective management team in place to run the company and serves to protect and advance the long-term interests of our stockholders. The role of our senior executives is to develop and implement a strategic business plan for AmerisourceBergen and to grow our business.

Why have we chosen to have an independent director serve as the Chairman of the Board?

        We believe that having a non-executive Chairman of the Board emphasizes the importance of the Board's objectivity and independence from management and best promotes the effective functioning of the Board's oversight role. Our Chairman's responsibility is to ensure that our Board functions properly and to work with our Chief Executive Officer to set its agenda. We expect our Chairman to facilitate communications among our directors and between the Board and senior management. While our Chairman provides independent leadership, he also works

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closely with our Chief Executive Officer to ensure that our directors receive the information that they need to perform their responsibilities, including discussing and providing critical review of the matters that come before the Board and assessing management's performance.

What are the standing Committees of the Board?

        There are five standing committees of the Board: the Audit and Corporate Responsibility Committee, the Compensation and Succession Planning Committee, the Executive Committee, the Finance Committee and the Governance and Nominating Committee. The Board committees, with the exception of the Executive Committee, are composed entirely of independent directors. The Board created the Finance Committee to provide independent oversight and review of our capital structure, credit policies and practices, dividend policy, share repurchase programs and financing transactions. We also have an Executive Committee, which is composed of our Chief Executive Officer, Chairman of the Board and the Chairs of the other standing committees and has the authority to act between regularly scheduled meetings of the Board, subject to applicable law. Mr. Collis is the Chair of the Executive Committee. In October 2011, our Board approved new committee assignments to provide directors with an opportunity to serve on different committees and deepen their understanding of our business and operations. In addition, the Board believes that changing committee assignments from time to time strengthens our corporate governance practices and enhances each committee's objective review of management.

Why is the composition of our Board appropriate for AmerisourceBergen?

        We are a global pharmaceutical services company. Our Board is called upon to address matters of considerable complexity. These issues range from evaluating long-range strategic initiatives to responding to changing market conditions and/or government regulations. To enhance the Board's decision-making process, we seek individuals with diverse backgrounds, skills and expertise to serve on our Board. Our Board is composed of directors with a mix of industry, operational, healthcare, government, business development, marketing and global expertise. We have directors who are current or former executive officers of public companies or wholesale distribution companies. Many of our directors serve or have served on the board of directors of other public companies. We have directors with significant public policy experience and knowledge of the healthcare and pharmaceutical industries. We believe that this mix encourages fresh perspectives, enriches the Board's deliberations and avoids the dominance of a particular individual or group over the Board's decisions.

        Given the diverse backgrounds of our directors, we provide our directors with comprehensive orientation and continuing education, which is overseen by the Governance and Nominating Committee. Director orientation familiarizes directors with our business and strategic plans, significant financial, accounting and risk management issues, compliance programs and other controls, policies, principal officers and internal auditors, and our independent registered public accounting firm. The orientation also addresses Board procedures, our corporate governance principles and our Board committee charters. We offer continuing education programs and provide opportunities to attend commercial director education seminars to assist our directors in maintaining their expertise in areas related to the work of the Board and the directors' committee assignments. We provide our directors with full membership to the National Association of Corporate Directors to provide a forum for them to maintain their insight into leading governance practices and exchange ideas with peers. For example, some of our directors have completed executive education programs for directors as part of their continuing education. In addition, one of our directors, Jane E. Henney, M.D., was named a member of the "NACD Directorship 100" in 2011 and 2012, an annual honor sponsored by the National Association of Corporate Directors to recognize influential directors and others who impact corporate governance.

Has AmerisourceBergen adopted corporate governance principles for the Board of Directors?

        Our Board has adopted the AmerisourceBergen Corporation Corporate Governance Principles. The corporate governance principles, together with the charters of the Board committees, provide the framework for the governance of AmerisourceBergen. The Board reviews and updates the corporate governance principles and the committee charters from time to time to reflect leading corporate governance practices. The corporate governance principles address a variety of governance issues, including those discussed under this heading and the headings Additional Information about the Directors, the Board and the Board Committees, Code of Ethics and Process for Identifying and Evaluating Director Nominees and for Submitting Recommendations.

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Where can stockholders find our corporate governance documents?

        Our corporate governance principles and the charters of the Audit and Corporate Responsibility Committee, the Compensation and Succession Planning Committee, the Finance Committee and the Governance and Nominating Committee have been posted under the Investors section of our website at www.amerisourcebergen.com.

Do we have a majority vote standard for director elections and a director resignation policy?

        Our bylaws and corporate governance principles provide for a majority vote standard for the election of directors. Under the majority vote standard, each director must be elected by a majority of the votes cast by the shares present in person or represented by proxy and entitled to vote. A "majority of the votes cast" means that the number of votes cast "for" a candidate for director must exceed the number of votes cast "against" that director. A plurality voting standard will apply instead of a majority voting standard if:

•

A stockholder has provided us with notice of a nominee for director in accordance with our bylaws; and



•

That nomination has not been withdrawn on or prior to the day next preceding the date the company first provides its notice of meeting for such meeting to stockholders.

        Under Delaware law, if an incumbent nominee for director in an uncontested election does not receive the required votes for re-election, the director remains in office until a successor is elected and qualified. Our bylaws and corporate governance principles require each director nominee to tender an irrevocable resignation prior to the applicable meeting of stockholders and include post-election procedures in the event an incumbent director does not receive the required votes for re-election, as follows:

•

The Governance and Nominating Committee shall make a recommendation to the Board as to whether to accept the previously tendered resignation of the director.



•

The Board will act on the Governance and Nominating Committee's recommendation.



•

The Board expects the director whose resignation is under consideration to abstain from participating in any decision regarding that resignation.

Has the Board determined which of the directors are independent?

        The Board has determined that, except for Mr. Collis, all of the directors and director nominees are independent. Our corporate governance principles require us to maintain a minimum of 70% independent directors on our Board. If the eight director nominees are elected at the 2013 Annual Meeting of Stockholders, nine out of ten directors then serving will be independent.

        The Board has adopted guidelines in our corporate governance principles to assist it in making independence determinations, which meet or exceed the independence requirements set forth in the NYSE listing standards. These guidelines are contained in Section 5 of our corporate governance principles, which are available to stockholders under the Investors section of our website at www.amerisourcebergen.com. For a director to be considered independent, the Board must determine that the director does not have any direct or indirect material relationship with AmerisourceBergen.

        With the assistance of legal counsel to the company, the Board reviewed the applicable legal standards for director and Board committee member independence. As a result of this review, the Board has determined that each of the following directors is independent: Douglas R. Conant, Charles H. Cotros, Richard W. Gochnauer, Richard C. Gozon, Edward E. Hagenlocker, Jane E. Henney, M.D., Kathleen W. Hyle, Michael J. Long and Henry W. McGee. The Board has also determined that, as required by their charters, all members of the Audit and Corporate Responsibility, the Compensation and Succession Planning Committee, the Finance Committee and the Governance and Nominating Committee are independent. In addition to the independence standards in our corporate governance principles, members of the Audit and Corporate Responsibility Committee may not accept directly or indirectly any consulting, advisory or other compensatory fee from us other than their directors' compensation. All members of the Audit and Corporate Responsibility Committee satisfy this additional SEC and NYSE independence requirement for audit committee members. We also apply this additional independence standard to the Compensation and Succession Planning Committee and the Governance and Nominating Committee and their members satisfy this standard. In undertaking its review, the Board considered that some of our directors serve on the board of directors of companies for which we perform (or may seek to perform) drug distribution and other services in the ordinary course of business.

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How does the Board oversee our risk management process?

        The Board executes its oversight responsibility for risk management directly and through its committees, as follows:

•

The Audit and Corporate Responsibility Committee (the "Audit Committee") has primary responsibility for monitoring our internal audit, corporate, financial and regulatory risk assessment and risk management processes and overseeing our system of internal controls and financial reporting. The Audit Committee discusses specific risk areas throughout the year, including those that may arise in various business units from time to time, and the measures taken by management to monitor and limit risk. In addition, the Audit Committee oversees the development and implementation of our enterprise risk management program.



•

The Audit Committee receives regular reports throughout the year on matters related to risk management. At each regularly scheduled meeting, the Audit Committee receives reports from our (i) external auditor on the status of audit activities and findings; and (ii) chief audit executive (who reports directly to the Audit Committee) on the status of the internal audit plan, audit results and any corrective action taken in response to audit findings.



•

We have a Chief Compliance Officer who is in charge of our corporate compliance program and training and monitoring compliance with our Code of Ethics and Business Conduct. Our Chief Compliance Officer and Chief Compliance Counsel report directly to our Audit Committee on compliance matters. In addition, we have an internal Compliance Committee composed of senior executives, including our Chief Compliance Officer and Chief Compliance Counsel, which administers our compliance program. Our Chief Compliance Officer and Chief Compliance Counsel provide reports to the Audit Committee throughout the year on the status of our compliance programs, calls to our hotline and any changes or developments.



•

The Board's other committees oversee risks associated with their respective areas of responsibility. For example, the Compensation and Succession Planning Committee assesses risks associated with our compensation policies and programs for executives as well as employees generally. Our Finance Committee discusses risks relating to our capital structure, financing activities, dividend and tax policy and share repurchase activities.



•

Each Board committee reports to the Board at every regular Board meeting on the topics discussed and actions taken at the most recent committee meeting. The Board discusses the risks and exposures, if any, involved in the matters or recommendations of the committees, as necessary.



•

The Board considers specific risk topics throughout the year, including risks associated with our business plan, operational efficiency, strategic objectives, government regulation, investment opportunities, physical facilities, information technology infrastructure and capital structure, among many others. Each fiscal quarter, our Chief Financial Officer reports to the Board on AmerisourceBergen's financial performance and discusses how actual performance compares to our business plan. Our corporate officers and the leaders of our principal business units report regularly to the Board about the risks and exposures related to their areas of responsibility. The Board is informed about and regularly discusses our risk profile, including legal, regulatory and operational risks to our business.

Has management conducted a risk assessment of AmerisourceBergen's employee compensation policies and practices?

        We have conducted an internal risk assessment of our employee compensation policies and practices, including those relating to our executives. We have concluded that our compensation policies and practices do not create risks that are reasonably likely to have a material adverse effect on AmerisourceBergen. We have reviewed our risk analysis with the Compensation and Succession Planning Committee. The risk assessment process included, among other things, a review of all key incentive compensation plans to ensure that they are aligned with our pay-for-performance philosophy and include performance metrics that support corporate goals. The objective of the process was to identify any compensation plans and practices that may encourage employees to take unnecessary risks that could threaten the

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company. No such plans or practices were identified. In particular, there are various factors that mitigate the risk profile of our compensation programs, including, among other things:

•

Performance targets under our cash incentive programs are tied to a number of different financial metrics so employees will not place undue emphasis on any particular metric at the expense of other aspects of our business;



•

Maximum caps on payouts have been established for our annual cash incentive programs, including under our Annual Incentive Plan, the cash bonus plan used for senior management;



•

Equity awards under our recently adopted performance plan for senior executives have maximum caps and are forfeited entirely if the threshold performance metrics are not achieved.



•

The performance plan ties 40% of a senior executive's annual equity awards to financial performance metrics achieved over a three-year period to ensure that our senior executives are accountable for long-term measures of success.



•

The remaining 60% of a senior executive's annual equity award (in stock options and restricted stock or restricted stock units) vests over a number of years to encourage senior executives to focus on long-term growth and creating value for stockholders.



•

Stock ownership requirements align the interests of our senior management with those of our stockholders;



•

We have effective management processes for developing annual business plans and a strong system of internal financial controls; and



•

A broad-based group of functions within the organization, including human resources, finance and legal, oversee aspects of our cash and equity incentive programs.

PROCESS FOR IDENTIFYING AND EVALUATING DIRECTOR NOMINEES AND FOR
SUBMITTING RECOMMENDATIONS

How does the Governance and Nominating Committee identify and evaluate director nominees?

        Director nominees should:

•

possess the highest personal and professional ethics, integrity and values;



•

be committed to representing the long-term interests of the stockholders; and



•

have an inquisitive and objective perspective, practical wisdom and mature judgment.

        The Governance and Nominating Committee seeks to identify candidates who bring diverse experience at policymaking levels in business, management, marketing, finance, technology, human resources, communications, education, government, healthcare and in other areas that are relevant to our activities.

        Additionally, director nominees should have sufficient time to effectively carry out their duties. The Chief Executive Officer of AmerisourceBergen may serve on the board of no more than one other public company. Other director nominees may serve on the boards of no more than four other public companies.

What process should a stockholder follow to propose nominees for consideration by the Governance and Nominating Committee?

        Stockholders may propose nominees for consideration by the Governance and Nominating Committee by submitting the names, appropriate biographical information and qualifications in writing to: Kathy H. Gaddes, Secretary, AmerisourceBergen Corporation, 1300 Morris Drive, Chesterbrook, Pennsylvania 19087.

        In considering any nominee proposed by a stockholder, the Governance and Nominating Committee will reach a conclusion based on the criteria described above. After full consideration, the stockholder proponent will be notified of the decision of the committee.

        In order to be considered by the Governance and Nominating Committee for the Annual Meeting of Stockholders to be held in 2014, the name of the proposed nominee and supporting biographical information and description of the qualifications of the proposed nominee must be received by us no later than September 20, 2013.

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AUDIT MATTERS

Audit Committee Financial Expert

        The Board of Directors has determined that Ms. Hyle is an "audit committee financial expert" as defined in Item 407(d)(5) of Regulation S-K. Ms. Hyle serves as Chair of the Audit and Corporate Responsibility Committee.

Report of the Audit and Corporate Responsibility Committee

        The Audit and Corporate Responsibility Committee consists of the four directors named below. All of the committee members are independent (as independence is defined in Section 303A of the NYSE Listed Company Manual and our corporate governance principles) and all of the members are financially literate.

        The committee reviewed and discussed with AmerisourceBergen's management and its independent registered public accounting firm (i) the audited financial statements contained in the company's Annual Report on Form 10-K for the fiscal year ended September 30, 2012 and (ii) the company's internal control over financial reporting. AmerisourceBergen's management has the primary responsibility for the company's financial statements and its financial reporting and control processes and procedures, including its internal control over financial reporting and its disclosure controls and procedures. AmerisourceBergen's management has represented to the Audit and Corporate Responsibility Committee that the financial statements contained in the company's Annual Report on Form 10-K for fiscal year 2012 were prepared in accordance with U.S. generally accepted accounting principles and that the company's internal control over financial reporting was effective as of September 30, 2012 (based on the criteria set forth in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission).

        The committee discussed with the company's independent registered public accounting firm, which is responsible for expressing an opinion on the conformity of the audited financial statements with U.S. generally accepted accounting principles, the firm's judgments as to the quality, not just the acceptability, of the company's accounting principles, the reasonableness of significant judgments reflected in the financial statements and the clarity of disclosures in the financial statements as well as such other matters as are required to be discussed with the committee under the standards of the Public Company Accounting Oversight Board (United States).

        The committee discussed with the company's independent registered public accounting firm the matters required to be discussed by the Statement on Auditing Standards No. 61, Communication with Audit Committees, as amended. In addition, the committee discussed with the independent registered public accounting firm the firm's independence from the company and its management, including the matters in the written disclosures and letter that were received by the committee from the independent registered public accounting firm as required by applicable requirements of the Public Company Accounting Oversight Board regarding the independent registered public accounting firm's communications with the committee concerning independence.

        The committee also discussed with the company's independent registered public accounting firm, the firm's audit of the effectiveness of the company's internal control over financial reporting as of September 30, 2012.

        Based on the reviews and discussions referred to above, the Audit and Corporate Responsibility Committee recommended to the Board of Directors that the audited financial statements be included in AmerisourceBergen's Annual Report on Form 10-K for fiscal year 2012.

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Policy for Pre-Approval of Audit and Non-Audit Services

        The Audit and Corporate Responsibility Committee's policy is to pre-approve all audit services and all non-audit services that the company's independent registered public accounting firm is permitted to perform for the company under applicable federal securities regulations. As permitted by the applicable regulations, the committee's policy utilizes a combination of specific pre-approval on a case-by-case basis of individual engagements of the independent registered public accounting firm and general pre-approval of certain categories of engagements up to predetermined dollar thresholds that are reviewed annually by the committee. Specific pre-approval is mandatory for the annual financial statement audit engagement, among others.

Independent Registered Public Accounting Firm's Fees

        During the fiscal years ended September 30, 2012 and 2011, Ernst & Young LLP, AmerisourceBergen's independent registered public accounting firm, billed the company the fees set forth below in connection with services rendered by the independent registered public accounting firm to the company:

        Audit fees consisted of fees for the audit of AmerisourceBergen's annual financial statements, consultation concerning financial accounting and reporting standards and consultation concerning matters relating to Section 404 of the Sarbanes-Oxley Act of 2002, review of quarterly financial statements as well as services normally provided in connection with statutory and regulatory filings or engagements, comfort letters, consents and assistance with and review of company documents filed with the SEC. Audit fees also included fees for the audit of the effectiveness of the company's internal control over financial reporting as required by Section 404 of the Sarbanes-Oxley Act of 2002.

        Audit-related fees consisted of fees for assurance and related services, including employee benefit plan audits and due diligence related to acquisitions.

        Tax fees consisted of fees for services related to tax compliance, tax advice and tax planning services.

        Other fees consisted of subscription fees for Internet-based professional literature.

        Our Audit and Corporate Responsibility Committee reviewed and approved all fees charged by Ernst & Young LLP in accordance with the policy described above and monitored the relationship between audit and permissible non-audit services provided. The policy is intended to ensure that the fees earned by Ernst & Young are consistent with the maintenance of the independent registered public accounting firm's independence in the conduct of its auditing functions.

RATIFICATION OF APPOINTMENT OF ERNST & YOUNG LLP AS
AMERISOURCEBERGEN'S INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
FOR FISCAL YEAR 2013
(Item 2 on the Proxy Card)

What am I voting on?

        You are voting on the ratification of the appointment of Ernst & Young LLP as AmerisourceBergen's independent registered public accounting firm for the fiscal year ending September 30, 2013. The Audit and Corporate Responsibility Committee of the Board of Directors has appointed Ernst & Young LLP to serve as our independent registered public accounting firm for fiscal year 2013. Although our governing documents do not require the submission of the appointment of AmerisourceBergen's independent registered public accounting firm to the stockholders for approval, the Board considers it desirable that the stockholders ratify the appointment of Ernst & Young LLP. Should the stockholders not ratify the appointment of Ernst & Young LLP as AmerisourceBergen's independent registered public accounting firm for the fiscal year ending September 30, 2013, the Audit and Corporate Responsibility Committee will investigate the reasons for the rejection by the stockholders and will reconsider the appointment of Ernst & Young LLP.

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What services will the independent registered public accounting firm provide?

        Audit services provided by Ernst & Young LLP for fiscal year 2013 will include the examination of the consolidated financial statements of AmerisourceBergen and services related to periodic filings made with the SEC. Audit services for fiscal year 2013 also will include the audit of the effectiveness of our internal control over financial reporting as required by Section 404 of the Sarbanes-Oxley Act of 2002. Additionally, Ernst & Young LLP may provide audit-related, tax and other services comparable in nature to the services performed in fiscal years 2011 and 2012, as described above under the heading Independent Registered Public Accounting Firm's Fees.

Will representatives of the independent registered public accounting firm be present at the 2013 Annual Meeting of Stockholders?

        Representatives of Ernst & Young LLP are expected to be present at the 2013 Annual Meeting of Stockholders. Such representatives will have an opportunity to make a statement, if they desire to do so, and will be available to respond to appropriate questions.

How does the Board of Directors recommend that I vote?

        We recommend that you vote For the ratification of the appointment of Ernst & Young LLP as AmerisourceBergen's independent registered public accounting firm for fiscal year 2013.

COMPENSATION COMMITTEE MATTERS

General

        Our Compensation and Succession Planning Committee, or the Committee, is composed of independent directors. The Committee is responsible for the design of our executive compensation program and review of succession planning. The Committee reviews and approves the compensation of our executives, including our named executive officers. The Committee also oversees our employee pension, long-term incentive and savings, health and welfare plans. The Committee has delegated the administration of our pension and benefit plans to an internal benefits committee, composed of senior finance, human resources and legal executives. The internal benefits committee oversees the management of our pension plan assets, the selection of investment options under our savings plans and the performance of the investment advisers and plan administrators.

Processes and Procedures

        Meetings.    The Committee met four times in 2012. The Chairman, in consultation with the other Committee members and management, prepares agendas that address an annual calendar of topics and other matters requiring the attention of the Committee. The Committee meets without management present, whenever necessary, to discuss matters it deems appropriate.

        Role of External Compensation Consultant.    The Committee has sole authority to engage an executive compensation consultant and to terminate the engagement of any such consultant. The Committee's consultant must be independent and objective. No firm will be disqualified solely on the basis of fees, provided it has not received more than $120,000 in the aggregate for the performance of any other services for AmerisourceBergen during the fiscal year. Pay Governance LLC served as the Committee's executive compensation consultant in 2012 pursuant to a written consulting agreement, subject to annual review. Following a review of Pay Governance in accordance with SEC and proposed NYSE rules regarding compensation consultants, the Committee determined that Pay Governance was independent and did not have any economic interests or other relationships that would conflict with Pay Governance's obligation to provide the Board with impartial and objective advice on compensation trends and practices.

        During 2012, Pay Governance advised the Committee on executive compensation matters, plan design and market trends. As directed by the Committee, the consultants prepared analyses and recommendations for the Committee and the Board relating to all aspects of the compensation of our executives, including pay recommendations for Mr. Collis. They advised the Committee on market practices regarding executive compensation, including long-term incentive pay, and reviewed our peer group, benchmarking methodology and the market positioning of the compensation provided to our named executive officers and other senior management. The consultants meet privately with the Committee and individual Committee members from time to time to plan for Committee meetings and discuss executive compensation matters.

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        Role of Executive Officers and Management.    Mr. Collis gives the Committee a performance assessment and pay recommendation for senior management, including each of the other named executive officers. Management, in consultation with the external compensation consultant, may also make recommendations to the Committee on matters of compensation philosophy and plan design. Executives may attend the Committee meetings, but they are not present when the Committee meets in executive session and they do not make recommendations regarding their own compensation.

        The Board of Directors establishes the compensation of directors based upon the recommendation of the Governance and Nominating Committee. Pay Governance provided analysis and recommendations regarding the company's non-employee director pay program. As described on page 15, the Board of Directors adopted a new compensation program for non-employee directors, which became effective January 1, 2012.

EXECUTIVE COMPENSATION

Compensation Discussion and Analysis

Executive Summary

Overview

        AmerisourceBergen is one of the largest pharmaceutical services companies in the world. We operate in a highly competitive environment. The purpose of our executive compensation program is to attract, motivate, and retain the executives who lead our business and align their interests with the long-term interests of our stockholders. Our fiscal year 2012 named executive officers are: Steven H. Collis, President and Chief Executive Officer; Tim G. Guttman, Senior Vice President and Chief Financial Officer; John G. Chou, Executive Vice President and General Counsel; James D. Frary, Senior Vice President and President, AmerisourceBergen Specialty Group (which we refer to as ABSG); David W. Neu, Senior Vice President and President, AmerisourceBergen Drug Corporation (which we refer to as ABDC); and Michael D. DiCandilo, former Executive Vice President and Chief Financial Officer of AmerisourceBergen Corporation.

        We seek to pay our executives fairly and competitively and to link pay with performance. The main elements of our compensation program are base salary, annual cash bonus and long-term equity incentive awards. Consistent with our compensation philosophy, we emphasize compensation opportunities that reward our executives when they deliver targeted financial results. Accordingly, a large percentage of our executives' compensation depends upon the achievement of long-term goals. In fiscal year 2012, incentive compensation (annual cash bonus and equity incentive awards) accounted for approximately 84% of Mr. Collis's total direct compensation opportunity (base salary, annual cash bonus and equity incentive awards) and 72% of the average total direct compensation opportunity of the other named executive officers (excluding Mr. DiCandilo). Through equity incentives and stock ownership requirements, we hold our named executive officers accountable for long-term measures of success designed to provide superior returns to our stockholders.

        In March 2012, we held a stockholder advisory vote on the compensation of our named executive officers, commonly referred to as a say-on-pay vote. Our stockholders overwhelmingly approved the compensation of our named executive officers, with approximately 97% of stockholder votes cast in favor of our 2012 say-on-pay resolution. As we evaluated our compensation practices and talent needs throughout 2012, we were mindful of the strong support our stockholders expressed for our pay for performance compensation philosophy and pay practices. As a result, our Compensation and Succession Planning Committee (which we refer to as the Committee) decided to retain our executive compensation philosophy generally, but to refine our philosophy by revising our target for total direct compensation opportunity downwards from the previous range of the 50^th to 75^th percentile of our peer group. Beginning in 2012, consistent with market leading practices, our executive compensation philosophy is to provide our executive officers with a target opportunity for total direct compensation at the median of our peer group. Given our historical pay practices, which have fallen below the market median, we expect to transition the pay opportunities for our executives to our compensation philosophy over time.

        The Committee also took steps to establish a closer relationship between executive pay and company performance by adopting a new performance plan as a component of our long-term incentive compensation program. The performance plan incorporates performance-based restricted stock units (which we refer to as performance share units or performance share awards) into our equity incentive program. The performance plan utilizes longer-term performance metrics that we believe are critical value drivers of the business and will further enhance the alignment between management and stockholder interests.

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        We believe our executive pay is reasonable and provides appropriate incentives to our executives to achieve our financial and strategic goals without encouraging them to take excessive risks in their business decisions. We regularly evaluate the major risks to our business, including how risks taken by management could impact the value of executive compensation. To this end, we note the following:

•

Neither our annual bonus plan nor our recently adopted equity incentive performance plan provide payment for poor performance, regardless of whether the failure to achieve target was outside of management's control.



•

There is a cap on both the annual bonus opportunity and the equity incentive performance plan, even for exceptional performance.



•

Executives must own our stock and the amount of their stock ownership increases with their level of responsibility. Mr. Collis owns approximately 0.45% of our outstanding common stock.



•

Beginning in 2009, forfeiture and repayment obligations attach to equity awards so that if any holder is terminated for cause, breaches non-compete obligations, or otherwise engages in conduct that is detrimental to AmerisourceBergen (including misconduct leading to the restatement of our financial statements), he or she will be required to forfeit outstanding awards and pay back the economic benefits realized from vested awards.



•

We prohibit our executives and non-executive directors from engaging in any speculative transactions in our securities and from hedging the economic risk of ownership of our stock.

2012 Fiscal Year Financial and Business Performance

        AmerisourceBergen performed well in fiscal year 2012. Our results in fiscal year 2012 reflected exceptional resiliency in our business. Fiscal year 2012 diluted earnings per share from continuing operations increased by 10% to $2.76 per share. Gross profit of $2.7 billion in fiscal year 2012 represented a 6.7% increase over the prior year. We generated record operating income of $1.3 billion and cash flow from operations of $1.3 billion. We achieved a return on invested capital (ROIC) of 18%, which exceeded our weighted average cost of capital. Our revenue was $79.5 billion for fiscal year 2012. Overall, our drug distribution, specialty drug distribution and consulting services businesses, as well as World Courier, demonstrated solid performance this past year. We invested in our future growth by completing nearly $800 million in acquisitions in fiscal year 2012. We returned a substantial amount of cash to our stockholders in fiscal year 2012 through $132.8 million in dividends and $1.2 billion in stock repurchases. Our business continues to generate excellent cash flow and, looking forward, we expect to have tremendous flexibility to reinvest in our business, fund our strategic initiatives and return significant value to our stockholders. Our total stockholder returns (TSR), including reinvestment of gross dividends, for the fiscal years ended September 30, 2012, 2011 and 2010 were 5.3%, 22.2%, and 40.8%, respectively. This compares to TSR of the S&P 500 Index of 30.2%, 0.7% and 13.1% over the same periods.

        The leadership and discipline of our management team contributed substantially to our performance over the last several years. Among other achievements in fiscal 2012, Mr. Collis and the other named executive officers demonstrated solid execution of our business plan and the promotion of our strategic objectives. They continued to position us appropriately for growth, including by increasing operating income, expanding operating income as a percentage of revenue and promoting a diverse customer and product mix in our businesses. Their focus on expense and working capital management increased our efficiency and improved our results. In addition, our management team promoted a philosophy of continuous improvement, leadership development among our senior managers and the ongoing importance of diversity and inclusion among our employee population.

2012 Fiscal Year Executive Compensation Actions

        The Committee reviews and makes decisions about executive compensation policies and plans, including the amount of base salary, cash bonus and long-term incentive awarded to our named executive officers. In setting executive compensation for fiscal year 2012, the Committee considered the following objectives:

•

Attract and retain knowledgeable and experienced senior executives.



•

Align individual objectives and performance with company objectives and performance.



•

Motivate our employees to work for and achieve superior results from year-to-year and in the long-term.



•

Hold our executives accountable for long-term measures of success.



•

Reward performance that exceeds established performance goals.

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•

Align the long-term financial interests of our executives with those of our stockholders.

        In addition to these objectives, the Committee took into account a number of factors in determining fiscal year 2012 compensation, including our financial and business results, individual performance and competitive data. In light of these considerations, the Committee made the following executive compensation decisions in fiscal year 2012:

•

Awarded merit pay increases to our named executive officers that reflected strong satisfaction with individual performance and, in some cases, increased responsibilities with a job promotion as well as a concerted effort to transition the base salaries of our named executive officers to targeted base salary in the 35^th percentile of our peer group in line with our compensation philosophy.



•

Established fiscal year 2012 performance goals for our annual cash bonus plan, including target EPS of $2.78 per share and ROIC of 18.5% at the corporate level, consistent with our Board-approved business plan.



•

Set target incentives for fiscal year 2012 cash bonuses ranging from 100% to 120% of base salary for the Chief Executive Officer and the other named executive officers.



•

Approved fiscal year 2012 cash bonus payouts that were paid at 97% of target for corporate level metrics in the aggregate. We exceeded target on EPS and slightly underperformed on corporate ROIC under our fiscal year 2012 bonus plan.



•

Established a performance plan component to our long-term incentive program for executive officers to provide for incentive awards with an equity payout that depends on the company's achievement of specified performance targets at the end of a three-year performance period.



•

Approved performance metrics of EPS and ROIC and set specific targets for these metrics for the performance share awards that we granted to our named executive officers in fiscal year 2012 (covering the performance period ending September 30, 2014).



•

Granted annual equity incentive awards to our named executive officers after considering our compensation philosophy and the Committee's assessment of individual performance and expected future contributions. The grant value of each award was split among stock options (40%), shares of restricted stock or restricted stock units (20%) and performance share units (40%).

        We believe that the fiscal year 2012 compensation of our named executive officers was aligned with AmerisourceBergen's fiscal year 2012 results and met our compensation objectives. Our compensation policies have enabled us to attract and retain talented and experienced executives. We believe that these policies have benefitted AmerisourceBergen over time and will position us for growth in future years.

Benchmarking Process

        We consider market pay practices as a starting reference point when setting executive compensation. Benchmarking helps the Committee assess whether our level of executive pay is appropriate when compared to industry standards. We generally conduct a detailed market review of executive pay annually to evaluate each element of pay and benefit competitiveness, review pay practices and compare performance against our peer group.

        In fiscal year 2012, the Committee reviewed peer group proxy statement data and broader survey data for similar positions when considering compensation for Messrs. Collis and Guttman and published compensation survey data when considering compensation for our other executive officers. When assessing pay levels, the Committee also reviews the relative positioning of our executive officers with each other. In 2012, the Committee's consultant concluded that our overall competitive posture for executive pay remained similar to our positioning in the 2011 assessment of executive pay in that the total direct compensation of our named executive officers fell below, and in some cases substantially below, the median total direct compensation of our peer group.

        Our peer group is composed of companies with business models and operations comparable to our own, including our two largest direct competitors. It includes companies with revenues that fall within a range of approximately 50% to 150% of our expected revenue. In fiscal year 2012, we ranked above the median for revenues of companies in our peer group. We believe our peer group reflects the type and complexity of business risks managed by our executives and that we compete with many of these companies for executive talent. The Committee reviewed the composition of

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the peer group in fiscal year 2012 with the assistance of its compensation consultant, and determined that no changes were necessary. The 2012 peer group was comprised of the following 15 companies:

2012 Peer Group

        Our compensation program targets executive pay relative to our peer group as follows:

Target Percentile Compensation for Fiscal Year 2012

        Beginning in fiscal year 2012, we revised our executive compensation philosophy to target total direct compensation opportunity in the 50^th percentile relative to our peers. However, total direct compensation for some of our named executive officers fell below our 50^th percentile target. This shortfall in total direct compensation as compared to our target pay philosophy is due, in part, to the fact that the target opportunity of our annual and long-term incentive awards is generally lower than that of our peers and, historically, because the base salaries of some of our named executive officers fell substantially below target. In recent years, we have taken some action to address the difference between our compensation philosophy and actual pay for the most affected executives by increasing base salaries and annual target bonus opportunities. In 2012, in a deliberate effort to transition the base salaries of our named executive officers to targeted base salary in the 35^th percentile of our peer group in line with our compensation philosophy, we again awarded base salary increases to our named executive officers (other than Mr. DiCandilo). It is the Committee's goal to have the base salaries of our named executives aligned with our compensation philosophy over time. In 2012, we also established a performance plan to increase the target opportunity of our long-term incentive awards if financial performance goals are met at the end of a three-year period.

Components of the Executive Compensation Program

        Our executive compensation program consists of three main components — base salary, cash bonus and long-term incentive. This represents a mix of fixed pay and annual and long-term incentives.

        Base Salary.    For our named executive officers, we target base salary in the 35^th percentile for similar positions in our peer group. Base pay provides a regular stream of income and financial security. By positioning base salary below our peer median, we place greater emphasis on incentive compensation. As part of a multi-year transition to align base salaries with our compensation philosophy, the Committee approved the salary adjustments ranging from a 9.5% to 20% increase for our named executive officers (excluding Mr. DiCandilo) in fiscal year 2012. In addition, the Committee awarded Mr. Guttman an increase in salary in connection with his promotion to Senior Vice President and Chief Financial Officer in May 2012.

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        Our executives are evaluated based on their job performance, changes in duties and scope of responsibilities, and expected future contributions. These salary increases reflected a positive performance review for all of the named executive officers and, in some cases, significant measures to bring the individual's salary more in line with our target. Despite the difficult economy, we delivered strong financial results for fiscal year 2012. These results were, in part, attributable to the sound leadership and performance of each of our named executive officers, including Mr. Collis.

        Cash Bonus.    We use annual cash bonuses to motivate executives to improve financial performance year-over-year and to reward executives who deliver targeted financial results. Cash bonuses are paid under our Annual Incentive Plan, or AIP.

        The Committee establishes the performance goals and incentive levels under the AIP for each of our named executive officers, and assigns a relative weighting to each performance measure. For each financial performance measure, there is a threshold and a target. Threshold refers to the minimum acceptable level of performance. We do not pay a bonus if our performance is at or below threshold. Target is the expected level of performance. Executives may receive an amount in excess of their target bonus (up to a maximum cap of an additional 50% of the target incentive) if we exceed target on the key performance metric established for them. Therefore, an individual's actual bonus consists of the amount determined for exceeding the thresholds and, if applicable, an amount (which we refer to as a "stretch" bonus) for exceeding target on the key performance metric established for them — EPS for Messrs. Collis, Guttman and Chou; ABSG pre-tax profit for Mr. Frary; and ABDC pre-tax profit for Mr. Neu. The stretch portion of the bonus is calculated by increasing the earned bonus by an additional 2% for every 1% that actual performance exceeds target on the key performance metric. For example, because actual EPS exceeded target EPS by 1.8% in fiscal year 2012, the stretch portion of the annual bonuses of Messrs. Collis, Guttman and Chou was calculated by multiplying their earned bonus by 3.6%.

        In November 2011, the Committee approved the following corporate performance measures under the AIP for fiscal year 2012:

        The Committee chose EPS and ROIC because they are the key metrics used by management to set business goals and evaluate our financial results. 2012 AIP financial performance measures were based on our Board-approved business plan for fiscal year 2012. In addition, we communicate our expectations about future business performance to investors by using an EPS range for each fiscal year. We generally set EPS targets to reflect our long-term business goal of growing EPS as close to 15% as is realistic annually, while allowing for reasonable flexibility to adjust our targets each year based on the impact of industry trends, other market factors and special items from year to year. ROIC equals after tax operating income divided by invested capital. ROIC measures how well we generate cash flow relative to the capital we invest in our business, including not only the cost of the assets employed but also the cost to acquire those assets. In fiscal year 2012, we exceeded target EPS and slightly underperformed on corporate ROIC.

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        Target and actual fiscal year 2012 cash bonuses for our named executive officers were as follows:

        The fiscal 2012 cash bonuses of Messrs. Collis and Chou were based on corporate financial performance metrics and corporate leadership goals so that their bonus payments would reflect our overall financial results for the year. Accordingly, 80% of the bonus payments to Messrs. Collis and Chou depended upon the achievement of corporate financial performance goals (with EPS weighted at 50% and ROIC weighted at 30% of the total target incentive) and 20% on individual leadership goals. Similarly, Mr. Guttman's cash bonus following his promotion to Senior Vice President and Chief Financial Officer was based 50% on EPS, 30% on ROIC and 20% on individual leadership goals. Prior to being named an executive officer, Mr. Guttman's cash bonus was based 50% on EPS, 10% on corporate ROIC and 40% on individual leadership goals. The Committee believes that leadership goals are an important component of the annual bonus plan for the named executive officers. The Committee uses leadership goals to emphasize business and strategic priorities that are expected to significantly impact financial results and that are within an individual's area of responsibility. For example, a material regulatory violation or loss of an investment grade rating has the potential to undermine EPS growth. In 2012, the Committee sought to improve the measurability of leadership goals by setting more specific goals for each named executive officer. Mr. Collis's leadership goals were to lead and direct the development of our long-term strategic plan, successfully integrate new acquisitions, build a succession and talent development program (including promotion of our diversity and inclusion values) and maintain a productive and value enhancing relationship with our Board and stockholders. Mr. Guttman's leadership goals were to avoid regulatory failure, maintain our investment grade rating, play a leadership role in the development of our long-term strategic plan and successfully transition to the position of Chief Financial Officer. Mr. Chou's leadership goals were to avoid material regulatory violations, play a leadership role in the development of our long-term strategic plan, facilitate a smooth transition for executive management changes and provide cost-effective delivery of legal services as measured against our peers. The Committee determined that each of Messrs. Collis, Guttman and Chou met their leadership goals for fiscal year 2012.

        For named executive officers who lead a business unit, a majority of his or her bonus is tied to business unit performance. In his capacity as the executive in charge of ABSG, Mr. Frary's fiscal year 2012 cash bonus was based on the following: 20% on EPS, 50% on ABSG pre-tax profit, 10% on ABSG revenue and 20% on leadership goals. Mr. Frary's stretch bonus was calculated based on ABSG's pre-tax profit performance. The Committee selects business unit performance goals that are designed to help us achieve our overall corporate EPS and ROIC goals for the fiscal year. The Committee selected ABSG pre-tax profit because it is a comprehensive measure that takes into account an intercompany charge based on the business unit's committed capital when assessing business unit performance. The Committee also determined that ABSG revenue was an appropriate financial performance measure because we want to incentivize ABSG executives to increase focus on ABSG market growth. For fiscal year 2012, target ABSG pre-tax profit was intended to achieve, at a minimum, pre-tax profit roughly equal to prior year ABSG pre-tax profit. In fiscal year 2012, ABSG exceeded its pre-tax profit target. However, in order to receive the full stretch bonus, ABSG was also required to have sufficient operating income in excess of its plan to cover 100% of the expense allocated to ABSG for stretch bonus compensation. Since ABSG operating income did not fully meet this additional metric, the stretch

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portion of the ABSG bonus was reduced by approximately 29%. Mr. Frary's leadership goals were to develop an international business strategy for ABSG, maintain leadership in the U.S. oncology market, play a leadership role in the development of our long-term strategic plan and support cross-collaboration among our business units regarding strategic customer accounts. The Committee determined that Mr. Frary met his leadership goals.

        As the executive in charge of ABDC, Mr. Neu's fiscal year 2012 cash bonus was based 20% on EPS, 50% on ABDC pre-tax profit, 10% on ABDC revenue and 20% on leadership goals related to ABDC's business operations. We believe this mix, which emphasizes ABDC's performance, appropriately links pay to Mr. Neu's operating responsibility. For this reason, ABDC pre-tax profit is the most heavily weighted performance metric for Mr. Neu and his stretch bonus was based on the extent to which ABDC's actual fiscal year 2012 pre-tax profit exceeded target. Pre-tax profit under the AIP is measured by determining a business unit's EBIT minus an intercompany charge based on the business unit's committed capital. For fiscal year 2012, target ABDC pre-tax profit was intended to achieve, at a minimum, an approximately 16% increase over fiscal year 2011 target ABDC pre-tax profit. At least three times in the last five fiscal years, ABDC has not achieved target on one or more AIP financial performance measures applicable to a named executive officer. Mr. Neu's leadership goals were to execute and drive our customer and business efficiency initiatives, implement our strategy with respect to the distribution of generic pharmaceutical products, play a leadership role in the development of our long-term strategic plan and execute a timely build out of distribution capabilities in our Canadian wholesale drug distribution operations. The Committee determined that Mr. Neu met 90% of his leadership goals for fiscal year 2012 due to a slower than expected build out of distribution capabilities in connection with our Canadian wholesale drug distribution operations.

        Although the Committee has discretion to give a bonus even though the pre-established performance goals have not been met or otherwise adjust a bonus payout up or down, it has rarely exercised this discretion. The Committee did not award any discretionary bonus to any named executive officers for fiscal year 2012.

        In November 2012, the Committee set fiscal year 2013 performance measures under the AIP, consistent with our Board-approved business plan. These measures include EPS, ROIC and free cash flow at the corporate level. At the business unit level, fiscal year 2013 AIP financial performance measures for our executive officers include ABDC pre-tax profit, ABDC operating income and ABDC revenue for ABDC; ABSG pre-tax profit, ABSG operating income and ABSG revenue for ABSG; and ABCS EBIT for AmerisourceBergen Consulting Services (which we refer to as ABCS). The Committee selected ABCS EBIT as the key performance metric for ABCS because ABCS's business strategy is less reliant on committed capital than our other operating units. The Committee also established leadership goals for each of the named executive officers, which included avoiding material regulatory or legal failure within the executive's area of organizational responsibility, executing specified business plans, facilitating organizational integration, promoting collaborative business relationships, developing succession plans and/or implementing corporate programs to address matters such as diversity, leadership development or employee satisfaction.

        Fiscal year 2013 target incentive levels for the named executive officers range from 100% to 130% of base salary, with the opportunity for each named executive officer to earn an additional 50% of his or her target incentive level (or a maximum bonus, depending on the target incentive level, ranging from 150% to 195% of base salary) if we exceed our financial performance goals.

        Long-Term Incentive.    We use annual equity incentive awards to motivate our named executive officers to achieve superior business results and financial performance over the long term. In February 2012, the Committee adopted a new performance share plan as part of our long-term incentive program for our executive leadership team. The performance plan is based on the attainment of specified EPS and ROIC goals over the three-year period of an award. We believe sustained EPS and ROIC performance is critical to deliver long-term value to our stockholders. The number of performance share units earned by an executive, if any, will depend on performance against specified performance goals over the entire three-year performance period of the award, and will be subject to "cliff" vesting based on continued employment at the end of the period. Equity incentive awards support our stock ownership requirements and further enhance the alignment between management and long-term stockholder interests.

        The Committee determines the target value of equity incentives to award our named executive officers with reference to our target compensation philosophy. The Committee also takes into account the average annual share use for total equity incentives granted to employees so as to provide stock options, restricted stock and performance share units to eligible employees at a reasonable rate and cost to AmerisourceBergen and its stockholders. The Committee considers the Chief Executive Officer's recommendations as well as individual performance and expected future contributions. Following the adoption of our performance plan, the grant value of a long-term incentive award for our most senior executives is allocated approximately 40% in the form of stock options, 20% in the form of restricted stock (or restricted stock units), and 40% in performance share units. We believe that this mix of equity-based compensation provides an incentive to achieve favorable long-term results at a reasonable cost to the company and increases the focus on stockholder return versus the market.

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        For fiscal year 2012, we awarded our named executive officers stock options, restricted stock (or restricted stock units) and performance share units in the following amounts:

        In the aggregate, our named executive officers received options to purchase 477,915 shares of our common stock and were awarded 40,948 restricted shares (or restricted stock units) of our common stock and 72,250 performance share units. These awards represented approximately 16% of the total equity incentives granted to management and other employees in fiscal year 2012. We believe that it was appropriate to award approximately 16% of the annual equity incentives to our executive officers because they are in the best position to drive our future results and implement our long-term business strategy. Moreover, equity awards directly link the long-term wealth accumulation opportunity we provide our executives with our stockholders' long-term interests. Equity incentives represented approximately 65% of Mr. Collis' total direct compensation and between 42% - 47% of the total direct compensation of the other named executive officers (excluding Mr. DiCandilo) in fiscal year 2012.

        The performance plan is designed specifically for our executive leadership team. Grants under the performance plan are in the form of restricted share units, which we refer to as performance share units. If the performance goals are met, a participating executive will receive a payout in shares of our common stock. Under the terms of the grant:

•

A participating executive has the opportunity to earn a payout based on our performance against pre-established performance metrics. For the current performance period extending from October 1, 2011 through September 30, 2014, the performance metrics are EPS and ROIC, which are weighted at 75% and 25%, respectively.



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Performance share units are settled using shares of our common stock. Each performance share unit represents the right to receive one share of our common stock. The common stock will not be restricted upon payout of the award.



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A participating executive has the opportunity to earn a payout between 0% and 150% of his or her target award based on our performance against performance metrics established by the Committee at the beginning of the performance period. If threshold performance for a particular metric is not attained, the executive forfeits the right to receive any payout based on that metric. Threshold performance for each of the metrics will result in a payout equal to 50% of the target award. Attaining the maximum goal for each metric will result in a payout equal to 150% of the target award.

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•

Vesting of performance share units, if any, occurs at the end of the three-year performance period applicable to the awards, subject to certain exceptions. An executive will forfeit his or her award upon voluntary termination (excluding voluntary retirement) of employment or termination for cause prior to vesting. An executive is entitled to receive a pro-rata portion of his or her award in the event of the executive's death, disability, or involuntary termination without cause prior to vesting, provided such event occurs at least 18 months after the beginning of the performance period. In addition, in the event of the executive's death or disability, the performance period will be measured only through the end of the most recently completed quarter prior to such event.



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Upon a change in control of AmerisourceBergen, an executive will be entitled to receive a payout of the award, if any, that is based upon an assessment of performance for a shortened performance period (extending through the end of the fiscal quarter preceding the change in control). Except as set forth below, the executive must remain continuously employed by us through the end of the original performance period in order to receive a payout of the award. However, if the executive is involuntarily terminated within two years of a change in control, the performance award will vest on the date of the executive's termination.



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If an executive voluntarily retires prior to the end of a performance period, the performance share award will continue to vest according to its original term, and the executive will be entitled to receive a payout under his or her award, if any, depending upon an assessment of our performance at the end of the three-year performance period.



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There are no dividends paid on outstanding performance share units during the performance period. Upon attainment of the performance share units, in addition to receiving the applicable number of shares of common stock determined according to the payout calculation, the executive will also receive additional shares of common stock equal in value to the total dividends that would have been paid on such shares.



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Performance share units do not carry voting rights.

        The Committee approved the terms of the performance share units to align with our three-year business planning cycle, and we expect that future performance share unit awards will have performance metrics based on this cycle. The Committee has selected performance metrics of EPS and ROIC for performance share awards, because the Committee believes these metrics are critical drivers of sustained value creation over the longer term. The Committee believes that the EPS and ROIC goals for a performance share unit award covering fiscal years 2012 - 2014 can be characterized as challenging and difficult to achieve, but attainable with significant effort and skill on the part of each member of the executive leadership team.

        Stock options, restricted stock and performance share units are subject to vesting and forfeiture provisions, described on page 48. In 2008, we amended our AmerisourceBergen Corporation Equity Incentive Plan, or EIP, to change the treatment of awards in retirement. As a result of the changes, for equity awards made in 2009 and beyond, when an executive retires, unvested awards will continue to vest according to their schedule and vested options will remain exercisable for the length of their original term (which is currently seven years). Equity awards made in 2009 and beyond that are held by current or former employees are subject to forfeiture and re-payment provisions for misconduct (including misconduct that leads to the restatement of our financial statements) or competitive behavior that is detrimental to the company. Retirement is defined as a voluntary termination of employment after age 62 with at least 60 months of continuous service. We believe that these requirements support our goal of retaining executives and aligning individual performance with our long-term growth. In addition, we believe that the post-retirement provisions provide an additional incentive for our executives, particularly those near retirement, to continue to focus on our long-term performance and, with the forfeiture and payment provisions, an added measure of protection against detrimental behavior by former employees.

Equity Award Grant Practices

        We have a written policy on equity grants designed to formalize our equity grant practices and ensure that equity awards will be made on specified dates. The Committee revised this policy so that, beginning in November 2012, the Committee will review and approve annual stock option, restricted stock and performance share awards to executives and other eligible employees in November of each year, which generally coincides with the beginning of our fiscal year. This policy change allows the Committee to make equity awards at the beginning of the relevant performance cycle with the benefit of reviewing results from the immediately preceding performance cycle. We also may make equity awards at other times during the year for new hires or other reasons, such as a job promotion or as a result of an

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acquisition. In accordance with our policy and our EIP, the Committee has delegated limited authority to the Chief Executive Officer to approve special grants to non-executive officers. These special awards may only be made on the 1^st day of a month (or the next trading day, if the first day of the month is not a trading day). The Committee or the Board must approve any equity awards to the named executive officers.

        The exercise price of any stock option award is the closing price of our common stock on the date of grant. We do not backdate or grant options or restricted stock retroactively. We generally schedule Board and Committee meetings at least one year in advance and, as noted above, make annual equity awards to our named executive officers at approximately the same time every year. We do not time our equity awards to take advantage of the release of earnings or other major announcements by us or market conditions.

Other Compensation

        Our named executive officers receive a limited amount of other benefits as part of a competitive compensation package. These benefits include a company matching contribution under our 401(k) plan, which is provided to all employee participants. We pay for tax and financial planning services for our executives to give them the opportunity to maximize the benefits from the compensation and benefits programs offered to them. In the aggregate, these other benefits constitute only a small percentage of each named executive officer's total compensation.

Deferred Compensation

        Executives may defer receipt of part or all of their cash compensation under our deferred compensation plan. The plan is intended to promote retention of executives by providing a long-term, tax efficient savings opportunity at low cost to us. Amounts deferred under the plan are allocated to the plan investment options chosen by the executive. The executive receives a quarterly adjustment in his or her account for any gains and losses on the amounts deferred under the plan.

Employee and Retirement Benefits

        Core employee benefits are available to the named executive officers on the same basis as all domestic employees generally. These benefits include medical and dental coverage, disability insurance, life insurance and a 401(k) plan.

        We offer a supplemental 401(k) plan to selected key management, including the named executive officers. We implemented this plan to address the absence of any non-legacy executive retirement plan following the 2001 merger to form the company and to permit executives to receive the full amount of the company match available for other employees generally under the 401(k) plan. This plan provides an annual contribution amount equal to 4% of a participant's salary and bonus to the extent that his or her compensation exceeds IRS limits applicable to our 401(k) plan.

        Mr. Neu participates in certain pension plans and supplemental executive retirement plans that we maintain. Mr. DiCandilo also participated in certain of these plans prior to his departure. These pension plans were in existence prior to the 2001 merger that formed our company and are now frozen with respect to participation and benefit accruals. These legacy plans are more fully described on pages 41 and 42.

Severance and Change in Control Benefits

        Severance Benefits.    We provide severance benefits under specified circumstances to give executives a measure of financial security following the loss of employment, to protect the company from competitive activities after the departure of certain executives, and because we believe that these benefits are important to attract and retain our executives in a competitive industry. We will provide severance benefits if we discharge a named executive officer without cause or he leaves the company for good reason. Good reason means a reduction in base salary or our failure to comply with our obligations (including, in some cases, by diminishing the executive's authority, duties and responsibilities) under his employment agreement. The terms of these benefits are set out in employment agreements and various plans, which are described on pages 44 and 45.

        We do not provide severance benefits if a named executive officer is terminated for cause or leaves without good reason. In that case, we would only pay the amount of accrued obligations.

        Change in Control.    We do not provide enhanced cash compensation in connection with a change in control of the company. We will accelerate the vesting of equity awards if a named executive officer's employment is involuntarily

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terminated by us within two years after a change in control. In the event of a change in control, we will also use a shortened performance period that extends only through the end of the fiscal quarter preceding the change in control to determine awards of performance share units. We provide these benefits to provide financial protection to employees following an involuntary loss of employment in connection with a change in control and to enable our executives to focus on important business decisions should we be acquired without regard to how the transaction may affect them personally. We believe that this structure provides executives with an appropriate incentive to cooperate in completing a change in control transaction. The Board and the Committee also have discretion under our EIP to take certain actions in the event of a change in control. These actions include cancelling options that are not exercised within 30 days after a change in control; cashing out outstanding options; cancelling any restricted stock awards in exchange for the payment of cash, property or a combination of cash and property equal to the award's value; or substituting other property (including securities of another entity) for awards granted under our EIP.

        In addition, there is discretion under the AIP to pay cash bonuses during any year in which a change in control occurs. If this discretion is exercised, bonus payments would be based on performance for the portion of the fiscal year until the change in control event and paid within 75 days of the change in control.

        Any payments that are made to the named executive officer as a result of termination are not intended to constitute excess parachute payments within the meaning of Section 280G of the Internal Revenue Code. The employment agreements of the named executive officers require us to reduce these payments, if necessary, to ensure that they do not constitute excess parachute payments.

        Separation Agreement.    We entered into a separation agreement with Mr. DiCandilo on April 2, 2012 in connection with Mr. DiCandilo's departure from AmerisourceBergen. Under the separation agreement, Mr. DiCandilo received base salary, vacation time accrued and unreimbursed employee business expenses incurred prior to March 30, 2012, the effective date of his separation from service with the company. Mr. DiCandilo also received a severance package consistent with his employment agreement with the company under which he is entitled to receive:

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his base salary (at the annual rate of $724,500) for the two-year period commencing on the date of separation, paid in installments pursuant to our normal payroll policy;



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the pro-rata portion of his target bonus for fiscal year 2012 in the amount of $381,405, less all applicable tax withholding;



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a lump sum payment in the amount of $899,611, less all applicable tax withholding, in each of fiscal years 2012 and 2013, which amount represents the average of the annual bonuses paid to Mr. DiCandilo with respect to the company's 2009, 2010 and 2011 fiscal years;



•

reimbursement for executive level outplacement assistance expenses incurred on or before December 31, 2013 up to an aggregate amount of $10,000; and



•

a lump sum payment of $11,500 (representing payment for tax and financial planning services), less applicable tax withholding.

        Mr. DiCandilo will retain the right to receive accrued benefits under the retirement plans and deferred compensation plans in which he participated. He may also receive continuation coverage under the company's group health plans pursuant to COBRA for himself (and to the extent permitted under COBRA, for his spouse and eligible dependents).

        Under the separation agreement, Mr. DiCandilo agreed to two-year non-competition and non-solicitation provisions, and provided the company with a general release of claims. Mr. DiCandilo forfeited equity awards, including any options or restricted share or restricted share unit awards to the extent that any such award had not vested prior to the date of separation.

        Amounts payable to Mr. DiCandilo that we have paid or accrued are included in the Summary Compensation Table. All amounts payable to Mr. DiCandilo under the separation agreement are included in the table on page 46 except for accumulated pension benefits and balances under our deferred compensation plan, which are set forth on pages 41 and 43.

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Executive Stock Ownership

        Our executives must own shares of our common stock in an amount equal to a multiple of their base salary. Stock ownership aligns management's interests with those of our stockholders and provides a continuing incentive for management to focus on long-term growth. Under our executive stock ownership guidelines, Mr. Collis must own shares worth five times his base salary and the other named executive officers must own shares worth three times their base salaries. Executives who become subject to the guidelines have three years from the date of hire or change in status, whichever is later, to comply with the ownership requirements. Following its annual review, the Committee determined that each of the named executive officers is in compliance with the guidelines.

Derivatives Trading and Hedging Prohibition

        No director, officer or employee may buy or sell options on our common stock or engage in short sales of our common stock. We also prohibit hedging the economic risk of ownership of our common stock. We discourage our employees from holding our stock in a margin account or pledging our stock as collateral for a loan. We have a written policy for our employees on these matters.

Tax and Accounting Considerations

        In 2012, we paid cash compensation in the amount of $3,356,625 to Mr. Collis, $247,063 to Mr. Chou, $167,658 to Mr. Frary and $373,509 to Mr. Neu that was not deductible under Internal Revenue Code Section 162(m), which prohibits us from deducting compensation in excess of $1 million paid to the named executive officers (other than, under current rules, the chief financial officer). We have not taken action to date to structure the elements of cash compensation payable to our executive officers so as to comply specifically with federal tax law regarding the deductibility of compensation in excess of $1 million. We will continue to consider and evaluate all of our compensation programs in light of federal tax law and regulations.

Compensation Committee Report

        The Compensation and Succession Planning Committee has reviewed and discussed with management the Compensation Discussion and Analysis contained in the 2013 Proxy Statement. Based on this review and discussion, we recommended to the Board of Directors that the Compensation Discussion and Analysis be included in the 2013 Proxy Statement and incorporated by reference into the company's Annual Report on Form 10-K for the fiscal year ended September 30, 2012.

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Executive Compensation Tables

Summary Compensation Table

        The following table sets forth the compensation paid to or earned during fiscal year 2012 by our President and Chief Executive Officer, Senior Vice President and Chief Financial Officer, the three other most highly compensated executive officers and our former Executive Vice President and Chief Financial Officer, who we refer to in this Proxy Statement as the named executive officers.

Salary (Column C)

        The amounts reported as salary represent the base salaries paid to each of the named executive officers for each fiscal year shown. Amounts shown for Mr. Collis include $90,600, $31,732 and $108,688, respectively, deferred into our deferred compensation plan for fiscal years 2010, 2011 and 2012, respectively. Mr. Guttman's salary for fiscal year 2012 represents amounts paid to him before and after his promotion to Senior Vice President and Chief Financial Officer in May 2012. Mr. DiCandilo's salary for fiscal year 2012 represents amounts paid to him during his employment through March 30, 2012.

Stock Awards and Option Awards (Columns D and E)

        The amounts reported in Columns D and E represent the grant date fair value for equity awards shown in accordance with Accounting Standards Codification No. 718 disregarding the estimate of forfeitures related to service-based vesting conditions. Such values do not reflect whether the recipient has actually realized a financial benefit from the award. On March 30, 2012, Mr. DiCandilo forfeited unvested stock options to purchase 251,250 shares of our common stock and 37,500 stock awards in accordance with the provisions of our EIP. There were no forfeitures by any of the other named executive officers in fiscal year 2012 or by any of the named executive officers in fiscal years 2011 or 2010. See Note 9 to the Consolidated Financial Statements contained in our Annual Report on Form 10-K for the fiscal year ended September 30, 2012 relating to assumptions made in the valuation.

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        For awards that are subject to performance conditions, such as the performance share units, in the table above we report the value at grant date based upon the probable outcome of such conditions consistent with our estimate of aggregate compensation cost to be recognized over the service period determined under Accounting Standards Codification No. 718, excluding the effect of estimated forfeitures. The following represents the maximum number of shares that may be earned for the performance share units awarded in fiscal year 2012, in the event that performance exceeds target: Mr. Collis 72,250, Mr. Chou 12,443, Mr. Frary 10,035 and Mr. Neu 13,647. Mr. Guttman did not receive any performance share units in fiscal year 2012 because he was not an executive officer as of the date of grant.

        Long-term equity incentive awards are made pursuant to our EIP. Annual equity awards generally are divided approximately 40% in the form of stock options, 20% in the form of restricted stock (or restricted stock units), and 40% in the form of performance share units. Stock options have an exercise price equal to the closing price of our common stock on the date of grant. Stock options vest 25% per year beginning on the first anniversary of the grant date and may be exercised over a term of seven (7) years from the date of grant for those stock options granted on or after February 27, 2008. Unvested options granted before 2009 normally cease to vest upon any termination of employment other than involuntary termination of employment within two years after a change in control. If we terminate a named executive officer for cause, all outstanding options (vested and unvested) are immediately cancelled. (See page 48 for a description of the impact of termination of employment on vesting and exercisability of restricted stock and stock options.)

        Restricted stock awards vest on the third anniversary of the grant date. Unvested restricted stock or restricted stock units are forfeited if the executive leaves the company prior to vesting, except by reason of death, disability or an involuntary termination of employment within two years after a change in control. In accordance with the dividend rate applicable to the declaration of dividends on our common stock from time to time, dividends on unvested restricted stock (and restricted stock units) are accrued and paid upon vesting. The dividend rate is not preferential. A restricted stock unit is a grant of shares of our common stock that is delivered at the time and to the extent that the shares vest.

        Performance share units vest at the end of the three-year performance period applicable to the awards, subject to achievement of the performance metrics and except as noted below. If threshold performance for a performance metric is not achieved, the executive will forfeit the right to receive any payout based on that metric. An executive will forfeit his or her award under the performance plan upon voluntary termination of employment or termination for cause prior to vesting. An executive is entitled to receive a pro-rata portion of his or her award in the event of the executive's death, disability or involuntary termination without cause prior to vesting, provided such event occurs after at least eighteen months from the beginning of the performance period. In addition, in the event of the executive's death or disability, the performance period will be measured only through the end of the most recently completed quarter prior to such event. Upon a change in control of AmerisourceBergen, an executive will be entitled to receive a payout, if any, based upon a shortened performance period (extending from the beginning of the performance period through the end of the fiscal quarter preceding the change in control), but the vesting and the payout of the award, if any, would be made at the end of the original performance period so long as the executive is continuously employed by us. However, in the case of the executive's involuntary termination with or without cause within two years of a change in control, the performance award will vest on the date of the executive's termination. If an executive voluntarily retires, the executive will be entitled to receive a payout of his or her award at the end of the three-year performance period. In accordance with the dividend rate applicable to the declaration of dividends on our common stock from time to time, dividends on unvested performance share units are accrued and paid upon vesting. The dividend rate is not preferential.

Non-Equity Incentive Plan Compensation (Column F)

        The amounts reported in Column F represent the annual cash bonuses awarded to the named executive officers under our AIP plan for the fiscal year shown. Cash bonuses were calculated based on the degree to which the named executive officer achieved the performance criteria established for him or her by the Compensation and Succession Planning Committee in the preceding November and approved by the Committee and paid in the November following the close of the applicable fiscal year.

        Under the AIP, payment of cash bonus depends upon the achievement of pre-established performance goals for the fiscal year. Cash bonus payments depend primarily on the achievement of financial performance goals and secondarily on individual leadership goals. We use a mix of financial performance goals at the corporate and, depending on the named executive officer, business unit level. In fiscal year 2012, corporate level financial

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performance measures were EPS and ROIC and business unit financial performance measures for certain named executive officers were ABDC pre-tax profit and ABDC revenue and ABSG pre-tax profit and ABSG revenue. (See cash bonus discussion on pages 28 - 30 under "Compensation Discussion and Analysis.")

Change in Pension Value and Non-Qualified Deferred Compensation Earnings (Column G)

        The amounts reported in Column G include the aggregate year-to-year change in the actuarial present value of the accumulated benefit measured as of September 30, 2012 under the AmerisourceBergen Corporation Participating Companies Pension Plan and AmerisourceBergen Drug Corporation Supplemental Retirement Plan for Mr. DiCandilo and the Bergen Brunswig Supplemental Retirement Plan for Mr. Neu.

        We do not provide above-market or preferential earnings on deferred compensation.

All Other Compensation (Column H)

        The following table shows the specific components of the amounts shown for fiscal year 2012 in Column H of the Summary Compensation Table:

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Grants of Plan Based Awards

        The following table sets forth certain information regarding grants of plan-based awards to each of our named executive officers during fiscal year 2012.

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Outstanding Equity Awards at 2012 Fiscal Year End

        The following table provides information on the current holdings of stock options and restricted stock (or restricted stock unit) awards by our named executive officers as of September 30, 2012. The market value of the shares set forth under the "Stock Awards" column was determined by multiplying the number of unvested shares by the closing price of our common stock of $38.71 per share on September 28, 2012, the last trading day of fiscal year 2012.

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Option Exercises and Stock Vested in Fiscal Year 2012

        The following table sets forth the number of shares acquired and the value realized upon exercise of stock options and vesting of restricted stock during fiscal year 2012 by each of the named executive officers.

Pension Benefits

        The following table provides information concerning pension benefits and supplemental retirement benefits for Messrs. Neu and DiCandilo. The other named executive officers do not participate in any pension or supplemental pension plan.

        AmerisourceBergen Corporation Participating Companies Pension Plan.    We maintain a qualified defined benefit pension plan for employees who meet the plan's eligibility requirements. Mr. DiCandilo was a participant in the pension plan. This pension plan was frozen as to new participants shortly after the August 2001 merger that formed AmerisourceBergen. Employees first hired after September 14, 2001 are not eligible to participate in the pension plan unless they are subject to the terms of a collective bargaining agreement with us that provides for such participation. Effective August 1, 2004, no collective bargaining agreements allow new participants to participate in the pension plan. In addition, the pension plan has been amended so that participants have ceased to earn any additional benefits under the plan for any compensation paid or services performed after June 30, 2007. Accordingly, the maximum benefits payable to participants were frozen as of June 30, 2007. Executive officers and other participants are entitled to annual pension benefits upon retirement at age 65 with at least five years of service. The benefit is equal to the number of years of credited service multiplied by 1% of the average annual compensation earned during the three consecutive years within the last ten years of participation in the pension plan that yield the highest average. The pension plan provides for early retirement at age 55 with at least 5 years of service. If an executive retires early, benefits will be reduced by 3.33% for each year between ages 55 and 60 and by 6.67% for each year between ages 60 and 65. Mr. DiCandilo is not eligible for early retirement under the pension plan. All pension plan costs are paid by us and the plan and benefits are funded on an actuarial basis. Compensation earned by executive officers for purposes of the pension plan includes salaries and bonuses paid prior to July 1, 2007, subject to limitations under the Employee Retirement Income Security Act of 1974, as amended, and the Internal Revenue Code as in effect during the year the

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wages were paid. As required by federal law, the pension plan limits the maximum annual benefits payable at Social Security retirement age as a single life annuity to the lesser of $200,000 or 100% of a plan participant's average total taxable earnings during his or her highest three consecutive calendar years of participation, subject to certain exceptions for benefits which accrued prior to September 30, 1988.

        AmerisourceBergen Drug Corporation Supplemental Retirement Plan.    We maintain a supplemental retirement plan in which Mr. DiCandilo is a participant. Benefits under the supplemental retirement plan were frozen as of June 30, 2007. Coverage under the supplemental retirement plan is limited to certain participants in the pension plan whose benefits under the pension plan are limited due to (i) restrictions imposed by the Internal Revenue Code on the amount of benefits to be paid from a tax-qualified plan, (ii) restrictions imposed by the Internal Revenue Code on the amount of an employee's compensation that may be taken into account in calculating benefits to be paid from a tax-qualified plan, or (iii) any reductions in the amount of compensation taken into account under the pension plan due to an employee's participation in certain deferred compensation plans sponsored by AmerisourceBergen or one of its subsidiaries. The supplemental plan provides for a supplement to the annual pension benefit paid under the pension plan to certain individuals who are pension participants and who have been employed by AmerisourceBergen or one of its subsidiaries for five continuous years or who suffer a total and permanent disability while employed by AmerisourceBergen or one of its subsidiaries, and to the pre-retirement death benefits payable under the pension plan on behalf of such participants who die with a vested interest in the pension plan. The amount of the supplement will be the difference, if any, between the pension or pre-retirement death benefit paid under the pension plan and that which would otherwise have been payable but for the restrictions imposed by the Internal Revenue Code and any reduction in the participant's compensation for purposes of the pension plan due to his or her participation in certain deferred compensation plans of AmerisourceBergen or one of its subsidiaries. The supplemental retirement benefit is payable in a lump sum upon termination, subject to any restrictions imposed under regulations under Section 409A of the Internal Revenue Code governing deferred compensation.

        Bergen Brunswig Supplemental Executive Retirement Plan.    We maintain a supplemental retirement plan for certain individuals who were designated officers and directors of one of our predecessor companies, Bergen Brunswig Corporation. Mr. Neu participates in this supplemental retirement plan. The plan was frozen as to new participants and compensation as of September 30, 2003. The plan is referred to as a "target" benefit plan because the plan seeks to provide a target level of retirement income for each participant based on a variety of factors. In general, benefits are determined based on a percentage of average compensation earned during the five years preceding the earlier of termination of employment or December 31, 2001, reduced by certain amounts, including, among others, the participant's social security payments and other retirement benefits payable to the participant. A $5,000 funeral benefit is payable to a participant's estate if the participant dies before the termination of employment. Under this plan, benefits become fully vested after five years of service or the attainment of age 62 while employed by us. Benefits are payable in a lump sum or in the form of a joint and survivor annuity, consisting of monthly payments to the participant for life. Upon the participant's death, a specified percentage of the monthly benefit will be paid to the participant's surviving beneficiary for the beneficiary's remaining life. Benefits payable under the plan are subject to any restrictions imposed under Section 409A of the Internal Revenue Code governing deferred compensation.

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Non-Qualified Defined Contribution and Other Deferred Compensation in Fiscal Year 2012

        The following table sets forth information regarding participation by the named executive officers in AmerisourceBergen's deferred compensation plan and supplemental 401(k) plan during fiscal year 2012 and at fiscal year end.

        Deferred Compensation Plan.    Eligible executive officers may elect to defer up to 50% of their annual cash compensation and have the deferred amount credited in an account under the deferred compensation plan. Deferral elections are made in December for compensation to be earned in the next year. Election forms must be filed for each year an executive officer wishes to defer compensation and each form shall specify the method of payment of benefits and the time such payment is to commence. Participants select the investment options under the plan and may change their election at any time by contacting the plan administrator. Aggregate earnings and losses on plan investments are credited to participants' accounts on a quarterly basis. The deferred benefits will be distributed by us in accordance with the terms of the plan and payment will be made at the times elected by the executive officer in accordance with the election form. An executive officer must specify whether he or she wishes to receive payment starting in the year of retirement or in the year after retirement and may elect to receive the deferred benefits (i) over annual periods ranging from three to fifteen years and payable in quarterly installments or (ii) in a single distribution. We pay all costs and expenses incurred in the administration of the plan.

        AmerisourceBergen Corporation Supplemental 401(k) Plan.    Selected key management, including all of the named executive officers, participates in the supplemental 401(k) plan. The supplemental 401(k) plan credits the account of each eligible participant with an annual amount equal to four percent (4%) of the participant's base salary and bonus incentive to the extent that his or her compensation exceeds the annual compensation limit established for our 401(k) plan by the Internal Revenue Code. The compensation limit is $250,000 for 2012. Annual accruals under the executive plan commenced effective as of January 1, 2006. In addition to annual accruals, certain eligible participants were credited with an initial amount based on his or her service after the merger in 2001 to form AmerisourceBergen. Fidelity Investments administers the supplemental 401(k) plan. Participants will be permitted to allocate the amounts in their accounts among investment options specified by the supplemental 401(k) plan administrator from time to time. Such allocation will be only for the purposes of determining gains and losses based on the performance of the underlying investments. Fidelity will credit participant accounts with plan benefits following the close of each calendar year. Account balances under the supplemental 401(k) plan do not vest in full until an employee reaches age 62 (or age 55 with more than 15 years of service), except that vesting is accelerated for disability, death and a change in control (as long as the participant is employed by the company on the date of the change in control). If a participant is terminated for cause, he or she forfeits all vested and unvested account balances under the supplemental 401(k) plan.

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Employment Agreements

        We have employment agreements with each of our named executive officers. The employment agreements are substantially similar in form and substance. Each employment agreement provides the following:

•

Continuation of base salary in effect for the named executive officer, subject to increase in accordance with our prevailing practice from time to time.



•

Incentive compensation, bonus and benefits in accordance with our prevailing practice from time to time.



•

Rights on our part to terminate the executive for cause or without cause.



•

Rights on the executive's part to terminate for good reason (upon at least 60 days' prior written notice and opportunity for the company to cure) or without good reason (upon at least 30 days' prior written notice).



•

During, and for a period of two years following termination of employment, each of the named executive officers has agreed not to (i) compete, directly or indirectly, with any business in which we or our subsidiaries engage or are considering for development or investment or (ii) solicit any of our employees for employment. The non-compete obligation of our named executive officers also includes the obligation to abide by non-compete obligations to which we are subject as a result of a divestiture or other contractual restrictions.

Potential Payments upon Termination of Employment or Change in Control

        Termination of Employment without Cause or Resignation with Good Reason.    Our named executive officers' employment agreements provide for severance payments in the event that we terminate their employment without cause or they leave the company for good reason. The table below identifies what would constitute cause or good reason to terminate employment under the agreements:

        In order to receive severance payments, the named executive officer must sign a release of any and all claims relating to his or her employment with us. These benefits include:

•

payment of base salary for a period of two years following the loss of employment;



•

payment of a pro rata bonus or, in the case of certain executives, a two-year bonus continuation payment based on the average annual bonuses paid in the preceding three years;



•

reimbursement of costs incurred by the executive to continue health coverage after the termination of employment;



•

executive outplacement assistance; and



•

accrued but unpaid cash compensation, such as unpaid base salary, vacation pay and business expenses (paid in a lump sum within 30 days of termination of employment).

        To the extent compliance with Section 409A of the Internal Revenue Code is necessary to avoid the application of an excise tax to any of the foregoing payments and benefits, the employment agreements provide for deferral (without interest) of any affected amounts due in the six months following the termination of employment.

        Termination of Employment with Cause or Resignation without Good Reason.    If we fire an executive for cause or he resigns without good reason, we will not pay the executive any cash severance. We will, however, pay him accrued but unpaid cash compensation through the date of termination. These amounts will include base salary through the date of termination, declared but unpaid bonus, accrued vacation pay and outstanding employee business expenses.

        Disability or Death.    If a named executive officer becomes disabled or dies, we will pay the executive, or his or her estate, the executive's pro rata target bonus and an amount equal to his or her accrued but unpaid cash compensation

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(including base salary, vacation pay and outstanding business expenses). We will pay this amount in a lump sum in cash within 30 days from the date of disability or death, except for the portion attributable to the cash bonus. That amount will be paid when the annual bonuses are paid to all employees generally.

        Retirement and Deferred Compensation Benefits.    Following retirement or termination of employment, our named executive officers will receive payment of retirement benefits and deferred compensation benefits under various plans in which they participate. The value of those benefits as of September 30, 2012 is set forth on pages 41 and 43 in the tables entitled "Pension Benefits" and "Nonqualified Defined Contribution and Other Deferred Compensation." There are no special or enhanced benefits under those plans for our named executive officers except that any account balances under the supplemental 401(k) plan would vest upon an executive's disability or death or as a result of a change in control of the company as long as the executive is employed by us on the date of the change in control.

Change in Control.

        We do not provide cash severance or enhanced benefits under the employment agreements with our named executive officers solely in connection with a change in control of the company. Certain of our benefit plans provide for accelerated vesting in connection with a change in control as follows:

•

account balances under the supplemental 401(k) plan would immediately vest upon a change in control as long as the executive is still employed by us; and



•

unvested stock options will vest and restrictions on stock awards will lapse if the executive is involuntarily terminated by us, whether or not for cause, within two years after a change in control; and



•

unvested performance share units will vest in the case of an executive's involuntarily termination of employment, whether or not for cause, within two years of a change in control and the payout of the award, if any, will be based on a shortened performance period (extending from the beginning of the performance period through the end of the fiscal quarter preceding the change in control).

        In addition, there are some circumstances where an award of benefits in connection with a change in control of the company is discretionary. Our internal benefits committee has discretion under our AIP to pay bonuses to eligible employees during any year in which a change in control occurs. If this discretion is exercised, bonus payments would be based on performance for the portion of the fiscal year until the change in control event and paid within 75 days of the change in control. In the event of a change in control, the Board may, in its discretion, cancel outstanding options that are not exercised within 30 days of the change in control, cash out the value of outstanding options or restricted stock or make any other adjustments it deems appropriate under the EIP. The Board may also cancel any award made under the EIP in exchange for payment of an equal value in cash or stock.

        No payments made to a named executive officer as a result of termination may constitute excess parachute payments within the meaning of Section 280G of the Internal Revenue Code. The employment agreements require us to reduce, if necessary, the amount of severance due to the named executive officers in connection with a termination of employment to ensure that such payments do not constitute excess parachute payments.

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Potential Payments upon Termination of Employment or Change in Control

        The table below quantifies the potential payments that would be owed to each named executive officer under various scenarios involving the termination of employment or change in control of the company as of September 28, 2012, the last business day of fiscal year 2012. The amounts presented are in addition to accumulated pension benefits and the balances under our deferred compensation plan (set forth on pages 41 and 43):

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        Equity Awards.    Our restricted stock, restricted stock unit, performance share unit and stock option awards include provisions that result in the vesting or forfeiture of awards depending on the reason for termination of employment. These provisions are as follows:

CERTAIN TRANSACTIONS

What is our policy with respect to transactions with related persons?

        We have a written Related Persons Transactions Policy. The Audit and Corporate Responsibility Committee must approve or ratify any transaction, arrangement or relationship exceeding $120,000 in which the company and any

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related person has a direct or indirect material interest. This policy includes any series of transactions that exceeds $120,000 in the aggregate in any calendar year. Related persons include:

•

directors and nominees;



•

executive officers;



•

persons controlling more than 5% of our common stock;



•

the immediate family members of each of these individuals; and



•

a firm, corporation or other entity in which any of these individuals is employed or is a partner or principal or in which any of these individuals has more than 5% ownership interest.

        Related persons must notify the General Counsel in advance of any proposed transaction with us. They must explain the principal features of the proposed transaction, including its potential value and benefit to us. The General Counsel will refer all proposed related person transactions exceeding $120,000 to the Audit and Corporate Responsibility Committee for review.

        The Audit and Corporate Responsibility Committee will consider the proposed transaction at its next regularly scheduled meeting. In reviewing the proposed transaction, the committee will take into account those factors it considers appropriate, including the business reasons for the transaction and whether the terms of the transaction are fair to the company and no less favorable than would be provided by an unaffiliated third party. The committee will also consider, if applicable, whether the proposed transaction would impair the independence of a director or present an improper conflict of interest for directors, nominees or executive officers. Directors with an interest in any proposed transaction will not vote on the proposed transaction. The committee will review and approve annually any ongoing related person transactions.

What is our policy with regard to loans to directors or officers?

        Our corporate governance principles prohibit us from making any personal loans or extensions of credit to directors or executive officers. We do not have any programs under which we extend loans to either directors or officers.

Transactions with Management

        The stepfather of Mr. Collis's wife is employed as an infrastructure planner for AmerisourceBergen. He received approximately $121,000 in compensation in fiscal year 2012. Mr. Neu's wife is employed as a vice president of AmerisourceBergen. She received approximately $295,000 in compensation in fiscal year 2012. Compensation amounts for these individuals include salary, bonus and equity compensation, if applicable. The compensation for these individuals was established in accordance with our standard employment and compensation practices applicable to employees with equivalent qualifications and responsibilities and holding similar positions.

ADVISORY VOTE TO APPROVE THE COMPENSATION
OF OUR NAMED EXECUTIVE OFFICERS
(Item 3 on the Proxy Card)

What am I voting on?

        You are voting on a proposal, commonly known as a "say-on-pay" proposal, which gives our stockholders the opportunity to endorse our executive officer pay program and policies through the following resolution:

"RESOLVED, that the compensation paid to AmerisourceBergen's named executive officers, as disclosed pursuant to Item 402 of Regulation S-K in the Company's Proxy Statement for the 2013 Annual Meeting of Stockholders, including the Compensation Discussion and Analysis, executive compensation tables and related narrative discussion, is hereby APPROVED."

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What factors should I consider when voting on this proposal?

        We urge you to consider the various factors regarding compensation matters as discussed in the Compensation Discussion and Analysis, beginning on page 24.

        As discussed at length in the Compensation Discussion and Analysis, we believe that our executive compensation program is reasonable, competitive and strongly focused on pay for performance principles. We emphasize compensation opportunities that reward our executives when they deliver targeted financial results. The compensation of our named executive officers varies depending upon the achievement of pre-established performance goals, both individual and corporate. Through stock ownership requirements and equity incentives, we also align the interests of our executives with those of our stockholders and the long-term interests of AmerisourceBergen. Our executive compensation policies have enabled AmerisourceBergen to attract and retain talented and experienced senior executives and have benefited AmerisourceBergen over time. We believe that the fiscal year 2012 compensation of our named executive officers was appropriate and aligned with AmerisourceBergen's fiscal year 2012 results and position for growth in future years.

Is this vote binding on the Board of Directors?

        Because your vote is advisory, it will not be binding upon the Board of Directors. However, our Board of Directors values the opinions that our stockholders express in their votes and will take into account the outcome of the vote when considering future executive compensation arrangements as it deems appropriate.

How does the Board of Directors recommend that I vote?

        We recommend that you vote For the advisory resolution approving the compensation of AmerisourceBergen's named executive officers as described in this Proxy Statement.

BENEFICIAL OWNERSHIP OF COMMON STOCK

        This table shows how much of our outstanding common stock is beneficially owned by each of the named executive officers, each of the directors and all directors and executive officers as a group as of November 30, 2012. The table also shows how much of our outstanding common stock is beneficially owned by owners of more than 5% of our outstanding common stock.

        According to the rules adopted by the SEC, a person "beneficially owns" securities if the person has or shares the power to vote them or to direct their investment or has the right to acquire beneficial ownership of such securities within 60 days through the exercise of an option, warrant, right of conversion of a security or otherwise. Except as otherwise noted, the beneficial owners listed have sole voting and investment power with respect to the shares shown. An asterisk in the Percent of Class column indicates beneficial ownership of less than 1%, based on 230,097,989 shares of common stock outstanding as of the close of regular trading on the NYSE on November 30, 2012.

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EQUITY COMPENSATION PLAN INFORMATION

        The following table sets forth information as of September 30, 2012 regarding all of our existing compensation plans pursuant to which equity securities are authorized for issuance to employees and non-employee directors.

SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

        Section 16(a) of the Securities Exchange Act of 1934, as amended, requires our directors and executive officers as well as persons who beneficially own more than 10 percent of our common stock to file with the SEC reports of ownership and changes in beneficial ownership of our common stock. Directors, executive officers and greater than 10 percent stockholders are required to furnish us with copies of all Section 16(a) forms they file. We believe that during fiscal year 2012 all of our directors and executive officers complied with these requirements.

AVAILABILITY OF FORM 10-K

        Copies of our Annual Report on Form 10-K for the fiscal year ended September 30, 2012 (without exhibits or documents incorporated by reference therein), are available without charge to stockholders upon written request to the Corporate and Investor Relations Department, AmerisourceBergen Corporation, 1300 Morris Drive, Chesterbrook, Pennsylvania 19087, by calling (610) 727-7000 or via the Internet at www.amerisourcebergen.com.

REQUIREMENTS FOR SUBMISSION OF PROXY PROPOSALS,
NOMINATION OF DIRECTORS AND OTHER BUSINESS OF STOCKHOLDERS

        Stockholder Proposals for Inclusion in the 2014 Proxy Statement.    Any proposal of a stockholder that is intended to be presented by such stockholder at AmerisourceBergen's 2014 Annual Meeting of Stockholders must be received in writing by September 20, 2013 in order to be considered for inclusion in the 2014 Proxy Statement and the form of proxy relating to the 2014 meeting. All proposals should be submitted, along with proof of ownership of AmerisourceBergen common stock in accordance with Rule 14a-8(b)(2), to: Kathy H. Gaddes, Secretary, AmerisourceBergen Corporation, 1300 Morris Drive, Chesterbrook, Pennsylvania 19087. Stockholder proposals must comply with SEC Rule 14a-8, Delaware law and our bylaws. Failure to deliver a proposal by these means may result in it not being deemed timely received.

        Other Stockholder Proposals for Presentation at the 2014 Annual Meeting of Stockholders.    Stockholders of record who do not submit a proposal for inclusion in AmerisourceBergen's proxy materials under SEC Rule 14a-8, but who instead intend to nominate a person for election as director or to introduce an item of business at the 2014 Annual Meeting of Stockholders must provide advance written notice to us in accordance with our bylaws. Our bylaws set forth the procedures that must be followed and the information that must be provided in order for a stockholder to nominate a person for election as director or to introduce an item of business at the 2014 Annual Meeting of Stockholders. We must receive notice of your intention to introduce a nomination or other item of business at the 2014 Annual Meeting of Stockholders no earlier than October 31, 2013 and no later than November 30, 2013. Such notice should be addressed to Kathy H. Gaddes, Secretary, AmerisourceBergen Corporation, 1300 Morris Drive, Chesterbrook, Pennsylvania 19087 and must include the information set forth in our bylaws. You may obtain a copy of our bylaws upon request by writing to the Secretary at our principal executive offices. The proxy solicited by our Board of Directors for the 2014 Annual Meeting of Stockholders will confer discretionary authority with respect to any such proposal.

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        The Chairman of the 2014 Annual Meeting of Stockholders may refuse to allow the transaction of any business or acknowledge the nomination of any person not made in compliance with the procedures set forth for such matters in our bylaws.

        Other Stockholder Communications.    Stockholder communications may be submitted at any time in writing to: Kathy H. Gaddes, Secretary, AmerisourceBergen Corporation, 1300 Morris Drive, Chesterbrook, Pennsylvania 19087. Stockholder communications are communications from any stockholder to the Board of Directors, any committee or any director on matters that relate reasonably to their respective duties and responsibilities. Stockholder communications do not include stockholder proposals (discussed above) and stockholder recommendations for director nominee candidates (discussed under Process for Identifying and Evaluating Director Nominees and for Submitting Recommendations at page 20). AmerisourceBergen's Secretary will determine, in her good faith judgment, which stockholder communications will be relayed to the Board of Directors, any committee or any director.

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