Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Killinger Elizabeth R
 2. Date of Event Requiring Statement (Month/Day/Year)
12/31/2015		 3. Issuer Name and Ticker or Trading Symbol
NRG ENERGY, INC. [NRG]
(Last)
(First)
(Middle)
NRG ENERGY, INC., 211 CARNEGIE CENTER		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Sr. VP & President,NRG Retail
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

PRINCETON, NJ 08540		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock, par value $.01 per share 63,629 (1)
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Non-Qualified Stock Option 01/04/2010 01/04/2020 Common Stock, par value $.01 per share 4,500 $ 23.87 D  
Non-Qualified Stock Option 01/03/2011 01/03/2021 Common Stock, par value $.01 per share 14,200 $ 19.83 D  
Market Stock Units 01/02/2016 01/02/2016 Common Stock, par value $01 per share 24,200 $ (2) (3) D  
Market Stock Units 01/02/2017 01/02/2017 Common Stock, par value $.01 per share 22,088 $ (4) (5) D  
Market Stock Units 01/02/2018 01/02/2018 Common Stock, par value $.01 per share 39,788 $ (6) (7) D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Killinger Elizabeth R
NRG ENERGY, INC.
211 CARNEGIE CENTER
PRINCETON, NJ 08540		       Sr. VP & President,NRG Retail  

Signatures

/s/ Brian Curci, by Power of Attorney 01/05/2016
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Includes 24,062 Restricted Stock Units ("RSUs") issued to Ms. Killnger by NRG Energy, Inc. under NRG's Long Term Incentive Plan ("LTIP"), 2,965 dividend equivalent rights ("DERs"), and 536 shares acquired under NRG Energy, Inc.'s Employee Stock Purchase Plan. Each RSU is equivalent in value to one share of NRG's Common Stock, par value $.01. Upon vesting of the RSUs, Ms. Killinger will receive from NRG the following: 7,200 shares issued on January 2, 2016; (ii) 6,062 shares issued on January 2, 2017; (iii) 10,800 shares issued on January 2, 2018. Each DER will accrue on Ms. Killinger's RSUs or MSUs and will become exercisable proportionately with the RSUs or MSUs to which they relate and can only be settled in NRG common stock. Each DER is the economic equivalent to one share of NRG common stock.
(2) Ms. Killinger was issued 12,100 Market Stock Units ("MSUs") by NRG under the LTIP on January 2, 2013. The MSUs will convert to shares of NRG Common Stock on January 2, 2016 only in the event the Company has achieved a certain level of total shareholder return ("TSR"). TSR will consist of the average of the closing price of NRG's Common Stock on January 2, 2016 and the nineteen preceding trading days and any dividends paid since the grant date as determined by the Compensation Committee.
(3) Ms. Killinger will receive a maximum of 24,200 shares of Common Stock if the Company has achieved a 100% increase in TSR since the grant date (the "Maximum"); 12,100 shares of Common Stock if there is no change in TSR since the grant date (the "Target"), or 6,050 shares of Common Stock if there is a 50% decrease in TSR since the grant date (the "Threshold"). Ms. Killinger will not receive any shares of Common Stock if TSR has decreased by more than 50% since the grant date. The number of shares of Common Stock that Ms. Killinger may receive is interpolated for TSR falling between Threshold, Target, and Maximum levels.
(4) Ms. Killinger was issued 11,044 Market Stock Units ("MSUs") by NRG under the LTIP on January 2, 2014. The MSUs will convert to shares of NRG Common Stock on January 2, 2017 only in the event the Company has achieved a certain level of total shareholder return ("TSR"). TSR will consist of the average of the closing price of NRG's Common Stock on January 2, 2017 and the nineteen preceding trading days and any dividends paid since the grant date as determined by the Compensation Committee.
(5) Ms. Killinger will receive a maximum of 22,088 shares of Common Stock if the Company has achieved a 100% increase in TSR since the grant date (the "Maximum"); 11,044 shares of Common Stock if there is no change in TSR since the grant date (the "Target"), or 8,283 shares of Common Stock if there is a 25% decrease in TSR since the grant date (the "Threshold"). Ms. Killinger will not receive any shares of Common Stock if TSR has decreased by more than 25% since the grant date. The number of shares of Common Stock that Ms. Killinger may receive is interpolated for TSR falling between Threshold, Target, and Maximum levels.
(6) Ms. Killinger was issued 19,894 Market Stock Units ("MSUs") by NRG under the LTIP on January 2, 2015. The MSUs will convert to shares of NRG Common Stock on January 2, 2018 only in the event the Company has achieved a certain level of total shareholder return ("TSR"). TSR will consist of the average of the closing price of NRG's Common Stock on January 2, 2018 and the nineteen preceding trading days and any dividends paid since the grant date as determined by the Compensation Committee.
(7) Ms. Killinger will receive a maximum of 39,788 shares of Common Stock if the Company has achieved a 100% increase in TSR since the grant date (the "Maximum"); 19,894 shares of Common Stock if there is no change in TSR since the grant date (the "Target"), or 14,921 shares of Common Stock if there is a 25% decrease in TSR since the grant date (the "Threshold"). Ms. Killinger will not receive any shares of Common Stock if TSR has decreased by more than 25% since the grant date. The number of shares of Common Stock that Ms. Killinger may receive is interpolated for TSR falling between Threshold, Target, and Maximum levels.

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