SUMMARY

The following summary highlights selected information from this joint proxy statement/prospectus and may not contain all of the information that may be important to you. Accordingly, shareholders of Zillow and stockholders of Trulia are encouraged to carefully read this entire joint proxy statement/prospectus, its annexes, and the documents referred to or incorporated by reference in this joint proxy statement/prospectus. Items in this summary include cross references directing you to a more complete description of that item. Please see “Where You Can Find More Information” beginning on page 214.

Information About the Companies (page 73)

Zillow, Inc.

Zillow, Inc. was incorporated as a Washington corporation effective December 13, 2004, and launched the initial version of its website, Zillow.com, in February 2006. Zillow operates the leading real estate and home-related information marketplaces on mobile and the Web, with a complementary portfolio of brands and products to help people find vital information about homes and connect with local professionals. Zillow’s principal executive offices are located at 1301 Second Avenue, Floor 31, Seattle, Washington 98101, and its telephone number is (206) 470-7000. Zillow’s website address is www.zillow.com. In addition, Zillow maintains a Facebook page at www.facebook.com/zillow and a twitter feed at www.twitter.com/zillow. Information contained on, or that can be accessed through, Zillow’s website, Facebook page or twitter feed does not constitute part of this joint proxy statement/prospectus and inclusions of its website address, Facebook page address and twitter feed address in this joint proxy statement/prospectus are inactive textual references only.

Trulia, Inc.

Trulia, Inc. was incorporated as a Delaware corporation effective June 1, 2005 as Realwide, Inc. On September 22, 2005, it changed its name to Trulia, Inc. Trulia’s online marketplace and mobile applications help consumers research homes and neighborhoods and provide a broad array of information to help them in the buying and selling processes. Trulia also helps real estate professionals market themselves and their listings. Trulia’s subscription-based real estate marketing and software products provide real estate professionals with access to transaction-ready consumers and help them grow and manage their businesses. Trulia’s principal executive offices are located at 116 New Montgomery Street, Suite 300, San Francisco, CA 94105, and its telephone number is (415) 648-4358. Trulia’s website address is www.trulia.com. Information contained on, or that can be accessed through, Trulia’s website does not constitute part of this joint proxy statement/prospectus, and inclusion of Trulia’s website address in this joint proxy statement/prospectus is an inactive textual reference only.

Zebra Holdco, Inc.

Zebra Holdco, Inc. was incorporated as a Washington corporation effective July 25, 2014, solely for the purpose of effecting the mergers. As described below in “— The Mergers” and more fully in “The Mergers” and “The Merger Agreement,” following the completion of the mergers, Zillow and Trulia will each become a wholly owned subsidiary of Holdco. Holdco intends to apply to list its Class A common stock on the [—] under the symbol “Z,” subject to official notice of issuance. Holdco anticipates that, following completion of the mergers, Holdco will change its name to Zillow, Inc. Holdco’s principal executive offices are located at 1301 Second Avenue, Floor 31, Seattle, Washington 98101, and its telephone number is (206) 470-7000.

The Mergers and the Merger Agreement (pages 86 and 145)

Zillow, Holdco and Trulia have entered into the merger agreement providing for Zillow’s acquisition of Trulia under a new holding company, Holdco. As a result of the transactions contemplated by the merger

agreement, former Zillow shareholders and former Trulia stockholders will own stock in Holdco, the Class A common stock of which is expected to be listed for trading on [—]. Pursuant to the merger agreement, Zillow Merger Sub will be merged with and into Zillow, and Trulia Merger Sub will be merged with and into Trulia. As a result of the mergers, Zillow and Trulia will each become a wholly owned subsidiary of Holdco.

Merger Consideration to Be Received by Zillow Shareholders (page 146)

Upon completion of the Zillow merger, (1) each outstanding share of Zillow Class A common stock, other than Zillow excluded shares (as defined below) and Zillow dissenting shares, will be converted into the right to receive one share of fully paid and nonassessable Holdco Class A common stock and (2) each outstanding share of Zillow Class B common stock, other than Zillow excluded shares and Zillow dissenting shares, will be converted into the right to receive one share of fully paid and nonassessable Holdco Class B common stock. Shares of Zillow common stock held by Zillow, Holdco, Trulia or any direct or indirect wholly owned subsidiary of Zillow or Trulia (the “Zillow excluded shares”) will be canceled and will not be converted into any shares of Holdco common stock or other consideration.

Zillow shareholders will not receive any fractional shares of Holdco common stock in the Zillow merger. Instead of receiving any fractional shares, each holder of Zillow common stock will be paid an amount in cash (without interest) equal to such fractional amount multiplied by the last reported sale price of Zillow Class A common stock on NASDAQ (as reported in The Wall Street Journal or, if not reported therein, in another authoritative source mutually selected by Zillow and Trulia) on the last complete trading day prior to the date of the effective time of the mergers.

Merger Consideration to Be Received by Trulia Stockholders (page 146)

Upon completion of the Trulia merger, each outstanding share of Trulia common stock, other than the Trulia excluded shares (as defined below), will be converted into the right to receive 0.444 of a share of fully paid and nonassessable Holdco Class A common stock. Shares of Trulia common stock that are held by Trulia, Holdco, Zillow, or any direct or indirect wholly owned subsidiary of Trulia or Zillow (the “Trulia excluded shares”) will be canceled and will not be converted into any shares of Holdco common stock or other consideration.

Trulia stockholders will not receive any fractional shares of Holdco common stock in the Trulia merger. Instead of receiving any fractional shares, each holder of Trulia common stock will be paid an amount in cash (without interest) equal to such fractional amount multiplied by the last reported sale price of Zillow Class A common stock on NASDAQ (as reported in The Wall Street Journal or, if not reported therein, in another authoritative source mutually selected by Zillow and Trulia) on the last complete trading day prior to the date of the effective time of the mergers.

Total Holdco Shares to Be Issued

Based on the number of shares of Zillow common stock outstanding as of [—], 2014 and the number of shares of Trulia common stock outstanding as of [—], 2014, the latest practicable date before the printing of this joint proxy statement/prospectus, and assuming no Zillow or Trulia stock options, restricted stock units, stock appreciation rights, or convertible notes are exercised, settled, or converted, as applicable, between [—], 2014 and the effective times of the mergers, the total number of shares of Holdco common stock to be issued immediately following the mergers will be approximately [—].

Comparative Per Share Market Price and Dividend Information (page 34)

Holdco common stock is not traded or quoted on a stock exchange or quotation system and, therefore, its common stock does not have a historical market value. As discussed below in “— Listing of Holdco Class A Common Stock,” Holdco has applied to have its Class A common stock listed on [—] upon completion of the mergers.

Zillow Class A common stock trades on NASDAQ under the symbol “Z,” and Trulia common stock trades on the NYSE under the symbol “TRLA.” The table below shows the closing prices of Zillow Class A common stock and Trulia common stock as reported on July 25, 2014, the last trading day before the merger agreement was publicly announced, and on [—], 2014, the last practicable trading day before the date of this joint proxy statement/prospectus. This table also shows the value of the Trulia merger consideration per share of Trulia common stock, which was calculated by multiplying the closing price of the Zillow Class A common stock as of the specified date by the Trulia exchange ratio of 0.444.

The market prices of Zillow Class A common stock and Trulia common stock will fluctuate prior to the consummation of the mergers. You should obtain current market quotations for the shares.

The Holdco Class B common stock issuable to holders of outstanding shares of Zillow Class B common stock will not be listed or quoted for trading in any public trading market.

Neither Zillow nor Trulia has paid a cash dividend on its common stock, and neither company has any current intention of doing so.

Zillow Special Meeting (page 73)

Date, Time, and Place

The Zillow special meeting will be held at [—] on [—], 2014, at [—] Pacific time, unless the Zillow special meeting is adjourned or postponed.

Quorum

A quorum is the minimum number of shares required to be present at the Zillow special meeting for the meeting to be properly held under Zillow’s amended and restated bylaws and Washington law. The presence, in person or represented by proxy, of holders of a majority of the total votes entitled to be cast at the Zillow special meeting will constitute a quorum at the meeting. In the absence of a quorum, a majority of the votes represented at the Zillow special meeting, present in person or represented by proxy, will have the power to adjourn the Zillow special meeting.

Purpose of the Zillow Special Meeting

At the Zillow special meeting, Zillow shareholders will be asked to consider and vote upon the following matters:

Record Date; Shares Entitled to Vote

Only holders of record of shares of Zillow common stock at the close of business on the Zillow record date of [—], 2014, will be entitled to vote at the Zillow special meeting. Each outstanding share of Zillow Class A common stock entitles its holder to cast one vote, and each outstanding share of Zillow Class B common stock entitles its holder to cast ten votes. As of the Zillow record date, there were [—] shares of Zillow Class A common stock and [—] shares of Zillow Class B common stock outstanding and entitled to vote at the Zillow special meeting.

Vote Required

Approving the merger agreement requires the affirmative vote of the holders of at least a majority of the voting power of the shares of Zillow Class A common stock and Zillow Class B common stock outstanding as of the Zillow record date and entitled to vote thereon, voting together as a single voting group. Accordingly, a Zillow shareholder’s failure to submit a proxy card or to vote in person at the Zillow special meeting, an abstention from voting, or the failure of a Zillow shareholder who holds his, her, or its shares in “street name” through a broker, bank, or other nominee to give voting instructions to such broker, bank, or other nominee will have the same effect as a vote “AGAINST” the proposal to approve the merger agreement.

Approving the authorization of nonvoting Class C capital stock in Holdco’s amended and restated articles of incorporation requires that the number of votes cast “FOR” the proposal by holders of shares of Zillow Class A common stock and Zillow Class B common stock present, in person or by proxy, at the Zillow special meeting and entitled to vote thereon, voting together as single voting group, exceeds the number of votes cast “AGAINST” the proposal by holders of shares of Zillow Class A common stock and Zillow Class B common stock present, in person or by proxy, at the Zillow special meeting and entitled to vote thereon, voting together as a single voting group. Accordingly, abstentions, broker non-votes and shares not in attendance at the Zillow special meeting will have no effect on the outcome of the vote to approve the authorization of nonvoting Class C capital stock in Holdco’s amended and restated articles of incorporation. If Proposal No. 2 to approve the authorization of nonvoting Class C capital stock in Holdco’s amended and restated articles of incorporation is not approved by Zillow shareholders, the mergers will not be completed, even if the proposal to adopt the merger agreement (Proposal No. 1) is approved.

Approving the adjournment of the Zillow special meeting if necessary or appropriate to solicit additional proxies if there are not sufficient votes to approve the merger agreement or to approve the authorization of nonvoting Class C capital stock in Holdco’s amended and restated articles of incorporation requires that the number of votes cast “FOR” the proposal by holders of shares of Zillow Class A common stock and Zillow Class B common stock present, in person or by proxy, at the Zillow special meeting and entitled to vote thereon, voting together as a single voting group, exceeds the number of votes cast against the proposal by holders of shares of Zillow Class A common stock and Zillow Class B common stock present, in person or by proxy, at the Zillow special meeting and entitled to vote thereon, voting together as a single voting group. Accordingly, abstentions, broker non-votes and shares not in attendance at the Zillow special meeting will have no effect on the outcome of any vote to adjourn the Zillow special meeting.

Voting by Zillow’s Directors and Executive Officers

As of the Zillow record date, Zillow’s directors and executive officers and certain of their affiliates beneficially owned [—] shares of Zillow Class A common stock and [—] shares of Zillow Class B common stock entitled to vote at the Zillow special meeting. This represents approximately [—]% in voting power of the outstanding shares of Zillow common stock entitled to be cast at the Zillow special meeting. Richard Barton and Lloyd Frink, who are Zillow directors and founders, and also own or control all of Zillow’s outstanding Class B common stock, have entered into a voting agreement with each other that obligates them to vote “FOR” the

Zillow proposal to approve the merger agreement and the other proposals to be considered at the Zillow special meeting. Additionally, Zillow currently expects that the other Zillow directors and executive officers will vote their shares of Zillow common stock in favor of the Zillow merger agreement proposal and the other proposals to be considered at the Zillow special meeting, although none of them is obligated to do so. See “— Interests of Officers and Directors in the Mergers” and “— Voting Agreements” below.

Trulia Special Meeting (page 80)

Date, Time, and Place

The Trulia special meeting will be held at [—] on [—], 2014, at [—] Pacific time, unless the Trulia special meeting is adjourned or postponed.

Quorum

A quorum is the minimum number of shares required to be present at the Trulia special meeting for the meeting to be properly held under Trulia’s amended and restated bylaws and Delaware law. The presence, in person or represented by proxy, of holders of a majority of all issued and outstanding shares of Trulia common stock entitled to vote at the Trulia special meeting will constitute a quorum at the meeting. In the absence of a quorum, the chairperson of the Trulia special meeting or the holders of Trulia common stock entitled to vote at the Trulia special meeting, present in person or represented by proxy, will have the power to adjourn the Trulia special meeting.

Purpose of the Trulia Special Meeting

At the Trulia special meeting, Trulia stockholders will be asked to consider and vote upon the following matters:

Record Date; Shares Entitled to Vote

Only holders of record of shares of Trulia common stock at the close of business on the Trulia record date of [—], 2014, will be entitled to vote at the Trulia special meeting. Each outstanding share of Trulia common stock entitles its holder to cast one vote. As of the Trulia record date, there were [—] shares of Trulia common stock outstanding and entitled to vote at the Trulia special meeting.

Vote Required

Adopting the merger agreement requires the affirmative vote of holders of a majority of the shares of Trulia common stock outstanding and entitled to vote on that proposal. Accordingly, a Trulia stockholder’s failure to submit a proxy card or to vote in person at the Trulia special meeting, an abstention from voting, or the failure of a Trulia stockholder who holds his, her, or its shares in “street name” through a broker, bank, or other nominee to give voting instructions to such broker, bank, or other nominee will have the same effect as a vote “AGAINST” the proposal to adopt the merger agreement.

Approving the authorization of nonvoting Class C capital stock in Holdco’s amended and restated articles of incorporation requires the affirmative vote of holders of a majority of the shares of Trulia common stock present, in person or by proxy, at the Trulia special meeting and entitled to vote on that proposal. Accordingly, abstentions will have the same effect as a vote “AGAINST” the proposal to approve the authorization of nonvoting Class C capital stock in Holdco’s amended and restated articles of incorporation, while broker non-votes and shares not in attendance at the Trulia special meeting will have no effect on the outcome of any vote to approve the authorization of nonvoting Class C capital stock in Holdco’s amended and restated articles of incorporation. If Proposal No. 2 to approve the authorization of nonvoting Class C capital stock in Holdco’s amended and restated articles of incorporation is not approved by Trulia stockholders, the mergers will not be completed, even if the proposal to adopt the merger agreement (Proposal No. 1) is approved.

Approving the adjournment of the Trulia special meeting if necessary or appropriate to solicit additional proxies if there are not sufficient votes to adopt the merger agreement or to approve the authorization of nonvoting Class C capital stock in Holdco’s amended and restated articles of incorporation requires the affirmative vote of holders of a majority of the shares of Trulia common stock present, in person or by proxy, at the Trulia special meeting and entitled to vote on the adjournment proposal. Accordingly, abstentions will have the same effect as a vote “AGAINST” the adjournment proposal, while broker non-votes and shares not in attendance at the Trulia special meeting will have no effect on the outcome of any vote to adjourn the Trulia special meeting.

Voting by Trulia’s Directors and Executive Officers

As of the Trulia record date, Trulia’s directors and executive officers and certain of their affiliates beneficially owned [—] shares of Trulia common stock entitled to vote at the Trulia special meeting. This represents approximately [—]% in voting power of the outstanding shares of Trulia common stock entitled to be cast at the Trulia special meeting. Trulia directors Peter Flint, Erik Bardman, Theresia Gouw, Daniel Stephen Hafner, Robert Moles, and Gregory Waldorf have each entered into voting agreements with Zillow that obligate them to vote “FOR” the Trulia proposal to adopt the merger agreement and the other proposals to be considered at the Trulia special meeting. Additionally, Trulia currently expects that the other Trulia directors and executive officers will vote their shares of Trulia common stock in favor of the Trulia merger agreement proposal and the other proposals to be considered at the Trulia special meeting, although none of them is obligated to do so. See “— Interests of Officers and Directors in the Mergers” and “—  Voting Agreements” below.

Recommendation of the Zillow Board (page 95)

The Zillow board unanimously (a) adopted the merger agreement and approved the transactions contemplated by the merger agreement, upon the terms and subject to the conditions set forth in the merger agreement, (b) determined that the mergers are fair to, and in the best interests of, Zillow and its shareholders, (c) authorized management to take such actions as are necessary or advisable to effect the transactions contemplated by the merger agreement, including submitting the merger agreement to the Zillow shareholders for approval at the Zillow special meeting, and (d) recommended that Zillow shareholders approve the merger agreement.

The Zillow board unanimously recommends that Zillow shareholders vote:

See “The Mergers — Recommendation of the Zillow Board; Zillow’s Reasons for the Merger.”

Recommendation of the Trulia Board (page 109)

The Trulia board (1) determined that the merger agreement and the Trulia merger are in the best interests of Trulia and its stockholders, (2) approved the merger agreement and the transactions contemplated by the merger agreement, including the Trulia merger, and declared the merger agreement advisable, (3) recommended that the Trulia stockholders adopt the merger agreement, and (4) directed that the merger agreement be submitted for consideration by the Trulia stockholders at the Trulia special meeting.

The Trulia board recommends that Trulia stockholders vote:

See “The Mergers — Recommendation of the Trulia Board; Trulia’s Reasons for the Merger.”

Opinion of Financial Advisor to Zillow (page 101)

Goldman, Sachs & Co. delivered its opinion to the Zillow board that, as of July 28, 2014 and based upon and subject to the factors and assumptions set forth therein, and taking into account the Trulia merger, the Zillow Class A exchange ratio and the Zillow Class B exchange ratio (together, the “Zillow exchange ratio”) pursuant to the merger agreement was fair from a financial point of view to the holders of Zillow common stock.

The full text of the written opinion of Goldman Sachs, dated July 28, 2014, which sets forth the assumptions made, procedures followed, matters considered and limitations on the review undertaken in connection with the opinion, is attached hereto as Annex D. Goldman Sachs provided its opinion for the information and assistance of the Zillow board in connection with its consideration of the mergers. The Goldman Sachs opinion is not a recommendation as to how any holder of Zillow common stock should vote with respect to the mergers or any other matter. Pursuant to an engagement letter between Zillow and Goldman Sachs, Zillow has agreed to pay Goldman Sachs a transaction fee of $14.0 million plus an additional amount in Zillow’s sole and absolute discretion of up to $2.0 million. Upon the execution of the merger agreement, $5.0 million of the transaction fee became payable, and the remainder is payable upon the completion of the mergers. For purposes of rendering its opinion, Goldman Sachs did not take into account any differential voting or other rights between the Holdco Class A common stock and Holdco Class B common stock.

Opinion of Financial Advisor to Trulia (page 115)

At a meeting of the Trulia board on July 27, 2014, J.P. Morgan Securities LLC rendered its oral opinion to the Trulia board that, as of such date and based upon and subject to the factors and assumptions set forth in its

opinion, the Trulia exchange ratio in the proposed mergers was fair, from a financial point of view, to the holders of the Trulia common stock. J.P. Morgan subsequently confirmed its oral opinion by delivering its written opinion, dated July 27, 2014, to the Trulia board. The full text of the written opinion of J.P. Morgan dated July 27, 2014, which sets forth, among other things, the assumptions made, matters considered and limits on the review undertaken, is attached as Annex E to this joint proxy statement/prospectus and is incorporated by reference herein in its entirety. Trulia stockholders are urged to read the opinion in its entirety. J.P. Morgan’s written opinion is addressed to the Trulia board, is directed only to the Trulia exchange ratio in the proposed mergers and does not constitute a recommendation to any stockholder of Trulia as to how such stockholder should vote at the Trulia special meeting. The summary of the opinion of J.P. Morgan set forth in this joint proxy statement/prospectus is qualified in its entirety by reference to the full text of such opinion.

Interests of Officers and Directors in the Mergers (page 125)

Certain of Zillow’s and Trulia’s executive officers and directors have financial interests in the mergers that are different from the interests of Zillow shareholders and Trulia stockholders, respectively. The members of the Zillow board and the Trulia board were aware of and considered these interests, among other matters, in evaluating and negotiating the merger agreement and the mergers and in recommending to Zillow shareholders and Trulia stockholders that the merger agreement be approved or adopted, as applicable. See “The Mergers — Interests of Officers and Directors in the Mergers” for more information about these interests.

Regulatory Approvals (page 135)

Each party has agreed to use reasonable best efforts to file, promptly after the date of the merger agreement, its respective filings under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended (the “HSR Act”), and make any other required submissions under the HSR Act with respect to the mergers and the other transactions contemplated by the merger agreement. Subject to the terms and conditions of the merger agreement, Zillow and Trulia have agreed to use their reasonable best efforts to take, or cause to be taken, all actions necessary under applicable laws to consummate the mergers including defending through litigation on the merits any claim asserted in court by any party in order to avoid entry of, or to have vacated or terminated, any decree, order or judgment that would prevent the consummation of the mergers as promptly as practicable and in any event by January 28, 2016 (the “outside date”). Zillow and Trulia each filed the required HSR notification and report forms on August 4, 2014, commencing the initial 30-calendar-day waiting period. On September 3, 2014, Zillow and Trulia each received a request for additional information and documentary material, which we refer to as a second request, from the Federal Trade Commission (the “FTC”) in connection with the FTC’s review of the mergers under the HSR Act. Issuance of the second request extends the waiting period under the HSR Act until 30 days after both Zillow and Trulia have substantially complied with the second request, unless the waiting period is voluntarily extended by the parties or terminated sooner by the FTC. Zillow and Trulia intend to respond to the second request as promptly as practicable and are cooperating with the FTC in connection with its review. See “The Mergers — Regulatory Approvals” for more information about each party’s obligations related to governmental and regulatory approvals.

Voting Agreements (page 166)

In connection with entering into the merger agreement, Zillow and certain directors of Trulia (the “Trulia supporting stockholders”), in their individual capacities, entered into voting agreements (the “Trulia voting agreements”) pursuant to which the Trulia supporting stockholders agreed to, among other things, vote their shares of Trulia common stock (1) in favor of the merger agreement and in favor of approval of the mergers and any other transactions contemplated by the merger agreement and (2) against any proposal made in opposition to, in competition with, or inconsistent with, the merger agreement or the mergers or any other transactions contemplated by the merger agreement. In addition, subject to specified exceptions, the Trulia supporting

stockholders agreed not to transfer their respective shares of Trulia common stock during the term of the Trulia voting agreements. The Trulia voting agreements may not be terminated by the Trulia supporting stockholders even if the Trulia board has withdrawn or changed its recommendation in favor of the transaction with Zillow and, in such instances, the Trulia supporting stockholders would be required to vote to approve the merger agreement and any transactions contemplated by the merger agreement. The Trulia voting agreements terminate upon the earlier of (a) the termination of the merger agreement for any reason or (b) the completion of the mergers. As of the Trulia record date, the Trulia supporting stockholders as a group owned and were entitled to vote [—] shares of Trulia common stock, or approximately [—]% of the shares of Trulia common stock outstanding on that date.

In connection with entering into the merger agreement, Richard Barton and Lloyd Frink (the “Zillow supporting shareholders”), in their individual capacities, entered into a voting agreement with each other (the “Zillow voting agreement”) pursuant to which they agreed to, among other things, vote their shares of Zillow common stock (1) in favor of the merger agreement and in favor of approval of the mergers and any other transactions contemplated by the merger agreement and (2) against any proposal made in opposition to, in competition with, or inconsistent with, the merger agreement or the mergers or any other transactions contemplated by the merger agreement. The Zillow voting agreement may not be terminated by the Zillow supporting shareholders even if the Zillow board has withdrawn or changed its recommendation in favor of the transaction with Trulia and, in such instances, the Zillow supporting shareholders would be required to vote to approve the merger agreement and any other transactions contemplated by the merger agreement. The Zillow voting agreement terminates upon the earliest of (a) the termination of the merger agreement, (b) the completion of the mergers and (c) July 27, 2015. As of the Zillow record date, the Zillow supporting shareholders together owned and were entitled to vote [—] shares of Zillow Class A common stock and [—] shares of Zillow Class B common stock, or approximately [—]% of the voting power of Zillow common stock outstanding on that date. Trulia is not a party to the Zillow voting agreement.

No Solicitation (page 156)

Subject to specified exceptions, each of Zillow and Trulia has agreed not to (1) solicit, initiate, or knowingly encourage, induce or facilitate any “competing transaction proposal” (as defined in the section entitled “The Merger Agreement — Covenants of the Parties — No Solicitation”) or any inquiry or proposal that may reasonably be expected to lead to a competing transaction proposal, (2) participate in any discussions or negotiations with any person regarding, or furnish any information with respect to, or cooperate in any way with any person with respect to, a competing transaction proposal or any inquiry or proposal that may reasonably be expected to lead to a competing transaction proposal, (3) engage in discussions or negotiations with any person relating to any competing transaction proposal or any inquiry or proposal that may reasonably be expected to lead to a competing transaction proposal, or (4) adopt, or propose publicly to adopt, or enter into any letter of intent or similar document or any contract (other than a confidentiality agreement) relating to any competing transaction proposal. Notwithstanding these restrictions, prior to receipt of the Zillow shareholder approval for Zillow or the Trulia stockholder approval for Trulia, a party may furnish nonpublic information regarding it and its subsidiaries to, or enter into discussions and negotiations with, any person in response to a bona fide written competing transaction proposal that the party’s board of directors concludes in good faith, after consulting with its outside legal counsel and financial advisors, is reasonably expected to result in a “superior proposal” (as defined in the section entitled “The Merger Agreement — Covenants of the Parties — No Solicitation”), if, among other things, the competing transaction proposal did not result from any breach of the restrictions described above.

Restrictions on Recommendation Withdrawal (page 157)

The merger agreement generally restricts the ability of the board of directors of each of Zillow and Trulia to withdraw its recommendation that its shareholders or stockholders, as applicable, approve or adopt the merger

agreement, as applicable. However, each of the Zillow board and the Trulia board may change its recommendation in response to (1) a “superior proposal” (as defined in the section entitled “The Merger Agreement — Covenants of the Parties — No Solicitation”), or (2) an unknown material event, circumstance, change, effect, development or condition in circumstances not involving or relating to a competing transaction proposal, in each case, if, among other things, such board of directors concludes that a failure to change its recommendation would be inconsistent with its fiduciary duties to its shareholders or stockholders, as applicable, under applicable laws and, if requested by the other party, its representatives have negotiated in good faith with the other party for five days regarding any modifications to the merger agreement so that the transaction contemplated thereby may be effected.

Conditions to Completion of the Mergers (page 160)

Mutual Conditions

The respective obligations of Trulia, Zillow and Holdco to consummate the mergers are subject to the satisfaction or waiver of certain conditions, including:

Conditions to the Obligations of Zillow and Holdco

The merger agreement provides that the obligations of Zillow and Holdco to complete the mergers are subject to the satisfaction or waiver of certain conditions, including:

Conditions to the Obligations of Trulia

The merger agreement provides that the obligations of Trulia to complete the mergers are subject to the satisfaction or waiver of certain conditions, including:

Closing (page 146)

The completion of the mergers (the “closing”) will occur on a date to be designated jointly by Zillow and Trulia, which will be as promptly as practicable (and, in any event, no later than two business days) after the satisfaction or, to the extent permitted under the merger agreement, waiver, of the last of all conditions to the mergers to be satisfied or waived, other than conditions that by their nature are to be satisfied at the closing and will in fact be satisfied or waived at the closing, unless another time or date is agreed to in writing by Zillow and Trulia.

Termination of the Merger Agreement (page 162)

The merger agreement may be terminated prior to the effective time of the Zillow merger, notwithstanding the adoption of the merger agreement by Trulia stockholders, under specified circumstances. See “The Merger Agreement — Termination” for more information about the circumstances in which either Zillow or Trulia could terminate the merger agreement.

Termination Fees; Expenses (page 163)

All fees and expenses incurred by the parties are to be paid by the party that has incurred the fees and expenses, except that (a) the parties have agreed to each pay one-half of all expenses relating to printing and mailing of this joint proxy statement/prospectus and the filing fee for the notification and report forms filed under the HSR Act, and (b) Zillow has agreed to pay all expenses relating to the filing fee incurred in connection with the Form S-4 Registration Statement.

The merger agreement provides that Zillow or Trulia, as applicable, will pay the other a cash termination fee in specified circumstances. For more information about the circumstances in which one or both of Zillow or Trulia must pay a termination fee and the amount of the potential fees, see “The Merger Agreement — Termination Fees; Expenses.”

Material U.S. Federal Income Tax Consequences (page 136)

Each of the mergers is intended to qualify for U.S. federal income tax purposes as a “reorganization” within the meaning of section 368(a) of the Code. The mergers are also intended to constitute exchanges to which section 351 of the Code applies. Assuming that each of the mergers qualifies as a reorganization for U.S. federal income tax purposes, a U.S. holder of shares of either Zillow common stock or Trulia common stock generally

will not recognize any gain or loss upon the exchange of its shares of Zillow common stock or Trulia common stock for shares of Holdco common stock and, to the extent that such U.S. holder receives cash in lieu of fractional shares of Holdco common stock, it will generally recognize capital gain or loss measured by the difference between the amount of cash received for a fractional share of Holdco common stock and its tax basis in the fractional share of Holdco common stock. Zillow shareholders and Trulia stockholders should consult their tax advisors for a full understanding of all of the tax consequences of the mergers. See “The Mergers — Material U.S. Federal Income Tax Consequences.”

Appraisal/Dissenters’ Rights (page 139)

Under Washington corporate law, holders of Zillow common stock are entitled to exercise dissenters’ rights in connection with the Zillow merger. Under Delaware corporate law, holders of Trulia common stock are not entitled to appraisal rights in connection with the Trulia merger. See “The Mergers — Appraisal/Dissenters’ Rights.”

Listing of Holdco Class A Common Stock (page 143)

Holdco Class A common stock received by Zillow shareholders in the Zillow merger and Trulia stockholders in the Trulia merger is expected to be listed on [—]. After completion of the mergers, shares of Zillow Class A common stock will no longer be quoted on NASDAQ and shares of Trulia common stock will no longer be quoted on the NYSE, and the Zillow Class A common stock and the Trulia common stock will no longer be registered under the Exchange Act. The Holdco Class B common stock issuable to holders of outstanding shares of Zillow Class B common stock will not be listed or quoted for trading on any public trading market.

Comparison of Shareholder Rights (page 188)

The rights of Zillow shareholders are governed by the WBCA, Zillow’s amended and restated articles of incorporation, and Zillow’s amended and restated bylaws. The rights of Trulia stockholders are governed by the DGCL, Trulia’s amended and restated certificate of incorporation, and Trulia’s amended and restated bylaws. Because Zillow shareholders and Trulia stockholders will receive shares of Holdco common stock in the mergers, the rights of both Zillow shareholders and Trulia stockholders will be governed by the WBCA, Holdco’s amended and restated articles of incorporation and Holdco’s amended and restated bylaws upon completion of the mergers. Holdco’s amended and restated articles of incorporation and amended and restated bylaws are substantially similar to the organizational documents of Zillow, except that they provide for a new class of nonvoting capital stock designated as Class C capital stock. Copies of Holdco’s amended and restated articles of incorporation and amended and restated bylaws are attached as Annex F and Annex G, respectively, to this joint proxy statement/prospectus. For a description of how the rights of a Holdco shareholder will be different than the rights of either a Zillow shareholder or a Trulia stockholder, see “Comparison of Shareholder Rights.”

Litigation Relating to the Mergers (page 144)

On August 7, 2014, August 8, 2014, and August 20, 2014, four putative class action lawsuits were filed by purported stockholders of Trulia against Trulia and its directors, Zillow, and Holdco in connection with the Trulia merger. One of those purported class actions, captioned Collier et al. v. Trulia, Inc., et al., Case No. CGC 14-540985 (August 7, 2014), was brought in the Superior Court of the State of California for the County of San Francisco. The other three of those purported class actions, captioned Shue et al. v. Trulia, Inc., et al., Case No. 10020 (August 7, 2014), Sciabacucci et al. v. Trulia, Inc., et al., Case No. 10022 (August 8, 2014), and Steinberg et al. v. Trulia, Inc. et al., Case No. 10049 (August 20, 2014), were brought in the Delaware Court of

Chancery. All four lawsuits allege that Trulia’s directors breached their fiduciary duties to Trulia stockholders, and that the other defendants aided and abetted such breaches, by seeking to sell Trulia through an allegedly unfair process and for an unfair price and on unfair terms. All lawsuits seek, among other things, equitable relief that would enjoin the consummation of the Trulia merger and attorneys’ fees and costs. The Delaware actions also seek rescission of the merger agreement (to the extent it has already been implemented) or rescissory damages and orders directing the defendants to account for alleged damages suffered by the plaintiff and the purported class as a result of the defendants’ alleged wrongdoing. The defendants believe that the foregoing lawsuits are entirely without merit and intend to defend against the actions vigorously.

ZILLOW SELECTED HISTORICAL FINANCIAL DATA AND OTHER DATA

The following tables present Zillow’s selected historical financial data as of and for the dates and periods indicated. The statement of operations data for the years ended December 31, 2011, 2012 and 2013 and the balance sheet data as of December 31, 2012 and 2013 have been derived from the audited financial statements of Zillow contained in its Annual Report on Form 10-K for the year ended December 31, 2013, which is incorporated into this joint proxy statement/prospectus by reference. The statement of operations data for the years ended December 31, 2009 and 2010 and the balance sheet data as of December 31, 2009, 2010 and 2011 have been derived from Zillow’s audited financial statements for such years, which have not been incorporated into this joint proxy statement/prospectus by reference. The unaudited condensed consolidated statement of operations data for the six months ended June 30, 2013 and 2014 and the unaudited condensed consolidated balance sheet data as of June 30, 2014 have been derived from the unaudited condensed consolidated financial statements of Zillow contained in its Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2014, which is incorporated into this joint proxy statement/prospectus by reference.

The following information is only a summary and is not necessarily indicative of the results of future operations of Zillow or Holdco. You should read this selected historical financial data together with Zillow’s financial statements that are incorporated by reference into this joint proxy statement/prospectus and their accompanying notes and management’s discussion and analysis of financial condition and results of operations contained therein.

Adjusted EBITDA

To provide investors with additional information regarding Zillow’s financial results, Zillow has included Adjusted EBITDA within this joint proxy statement/prospectus, a financial measure that is not calculated in accordance with generally accepted accounting principles in the United States (“GAAP”). Zillow has provided a reconciliation below of Adjusted EBITDA to net income (loss), the most directly comparable GAAP financial measure.

Adjusted EBITDA is included in this joint proxy statement/prospectus because it is a key metric used by Zillow’s management and board of directors to measure operating performance and trends and to prepare and approve Zillow’s annual budget. In particular, the exclusion of certain expenses in calculating Adjusted EBITDA facilitates operating performance comparisons of Zillow on a period-to-period basis.

Use of Adjusted EBITDA has limitations as an analytical tool, and you should not consider it in isolation or as a substitute for analysis of Zillow’s results as reported under GAAP. Some of these limitations are:

Because of these limitations, you should consider Adjusted EBITDA alongside other financial performance measures, including various cash flow metrics, net income (loss) and Zillow’s other GAAP results.

The following table presents a reconciliation of Adjusted EBITDA to net income (loss) for each of the periods presented:

TRULIA SELECTED HISTORICAL FINANCIAL DATA AND OTHER DATA

The following tables present Trulia’s selected historical financial data as of and for the dates and periods indicated. The consolidated statement of operations data for the years ended December 31, 2011, 2012 and 2013 and the balance sheet data as of December 31, 2012 and 2013 have been derived from the audited financial statements of Trulia contained in its Annual Report on Form 10-K/A for the year ended December 31, 2013, which is incorporated into this joint proxy statement/prospectus by reference. The statement of operations data for the years ended December 31, 2009 and 2010 and the balance sheet data as of December 31, 2009, 2010 and 2011 have been derived from Trulia’s audited financial statements for such years, which have not been incorporated into this joint proxy statement/prospectus by reference. The condensed consolidated unaudited statement of operations data for the six months ended June 30, 2013 and 2014 and the unaudited balance sheet data as of June 30, 2014 have been derived from the unaudited financial statements of Trulia contained in its Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2014, which is incorporated into this joint proxy statement/prospectus by reference.

The following information is only a summary and is not necessarily indicative of the results of future operations of Trulia or Holdco. You should read this selected historical financial data together with Trulia’s financial statements that are incorporated by reference into this joint proxy statement/prospectus and their accompanying notes and management’s discussion and analysis of financial condition and results of operations contained therein.

Non-GAAP Financial Measures

Adjusted EBITDA is a financial measure that is not calculated in accordance with GAAP. Trulia defines Adjusted EBITDA as net loss adjusted to exclude interest income, interest expense, taxes, depreciation and amortization, change in the fair value of the warrant liability, and stock-based compensation. Below in this joint proxy statement/prospectus, Trulia has provided a reconciliation of Adjusted EBITDA to net loss, the most directly comparable financial measure calculated and presented in accordance with GAAP. Adjusted EBITDA should not be considered as an alternative to net loss or any other measure of financial performance calculated and presented in accordance with GAAP. Trulia’s Adjusted EBITDA may not be comparable to similarly titled measures of other organizations because other organizations may not calculate Adjusted EBITDA in the same manner as Trulia calculates the measure.

Trulia includes Adjusted EBITDA in this joint proxy statement/prospectus because it is an important measure upon which Trulia’s management assesses Trulia’s operating performance. Trulia uses Adjusted EBITDA as a key performance measure because Trulia believes it facilitates operating performance comparisons from period to period by excluding potential differences primarily caused by variations in capital structures, tax positions, the impact of depreciation and amortization expense on fixed assets, changes related to the fair value

remeasurements of the preferred stock warrant, and the impact of stock-based compensation expense. Because Adjusted EBITDA facilitates internal comparisons of Trulia’s historical operating performance on a more consistent basis, Trulia also uses Adjusted EBITDA for business planning purposes, to incentivize and compensate its management personnel, and in evaluating acquisition opportunities. In addition, Trulia believes Adjusted EBITDA and similar measures are widely used by investors, securities analysts, ratings agencies, and other parties in evaluating companies in Trulia’s industry as a measure of financial performance and debt-service capabilities.

Trulia’s use of Adjusted EBITDA has limitations as an analytical tool, and you should not consider it in isolation or as a substitute for analysis of results as reported under GAAP. Some of these limitations are:

In evaluating Adjusted EBITDA, you should be aware that in the future Trulia will incur expenses similar to the adjustments in this presentation. Trulia’s presentation of Adjusted EBITDA should not be construed as an inference that Trulia’s future results will be unaffected by these expenses or any unusual or non-recurring items. When evaluating Trulia’s performance, you should consider Adjusted EBITDA alongside other financial performance measures, including Trulia’s net loss and other GAAP results.

The following table presents a reconciliation of Adjusted EBITDA to Trulia’s net loss, the most comparable GAAP measure, for each of the periods indicated: