# EDGAR Filing Document

**Accession Number:** 0001013871
**File Stem:** 0001104659-26-023624
**Filing Date:** 2026-3
**Character Count:** 7795
**Document Hash:** 46602b62e612285bc7cf498f8a9534fe
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-023624.hdr.sgml**: 20260304

**ACCESSION NUMBER**: 0001104659-26-023624

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260304

**FILED AS OF DATE**: 20260304

**DATE AS OF CHANGE**: 20260304

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Nanus David
- **CENTRAL INDEX KEY:** 0001870860

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-15891
- **FILM NUMBER:** 26723398

**MAIL ADDRESS:**
- **STREET 1:** 250 W 55TH STREET
- **STREET 2:** 31ST FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** NRG ENERGY, INC.
- **CENTRAL INDEX KEY:** 0001013871
- **STANDARD INDUSTRIAL CLASSIFICATION:** ELECTRIC SERVICES [4911]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 411724239
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 910 LOUISIANA STREET
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77002
- **BUSINESS PHONE:** 713-537-3000

**MAIL ADDRESS:**
- **STREET 1:** 910 LOUISIANA STREET
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77002

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** NRG ENERGY INC
- **DATE OF NAME CHANGE:** 19960509

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

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[x] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Nanus David<br><sub>(Last) (First) (Middle)</sub><br>250 W 55TH STREET, 31ST FLOOR<br><sub>(Street)</sub><br>NEW YORK, NY 10019<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-03-04 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>NRG ENERGY, INC. [ NRG ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common stock, par value $0.01 per share | 2026-03-04 |  | S |  | 14300000<sup>(1)</sup> | D | $164 | 6650000 | I | See Footnotes<sup>(3)(4)</sup> |
| Common stock, par value $0.01 per share | 2026-03-04 |  | S |  | 1829269<sup>(2)</sup> | D | $164 | 4820731 | I | See Footnotes<sup>(3)(4)</sup> |
| Common stock, par value $0.01 per share |  |  |  |  |  |  |  | 3300000 | I | See Footnote<sup>(5)</sup> |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) These shares were sold by Lightning Power Holdings, LLC, Thunder Generation LLC, and CCS Power Holdings, LLC (the Selling Stockholders) pursuant to an underwriting agreement dated March 2. 2026, among the Selling Stockholders, the Issuer, Barclays Capital Inc. and Citibank Global Markets Inc., at a price per share of $164, before underwriting discounts and commissions (the Secondary Offering). The Secondary Offering closed on March 4, 2026.

(2) Also on March 4, 2026, the Selling Stockholders sold shares of the Issuer's Common Stock at a price of $164 to the Issuer pursuant to a Stock Repurchase Agreement dated as of February 27, 2026.

(3) 3,782,093, 799,282, and 239,356 shares are held directly by Lightning Power Holdings, LLC, Thunder Generation LLC, and CCS Power Holdings, LLC, respectively. The investment advisor to the LS Power entities who may be deemed to beneficially own the securities held by the Selling Stockholders is LS Power Equity Advisors, LLC (LSP Advisors). The reporting person is the President of LSP Advisors.

(4) The reporting person, through his position, relationship and/or affiliation with the LS Power entities, may have shared voting and investment power with respect to the shares beneficially owned by the LS Power entities. As such, the reporting person may be deemed to have or share beneficial ownership of the shares beneficially owned by the LS Power entities. The reporting person disclaims beneficial ownership of such shares.

(5) The Issuer and the Selling Stockholders are parties to an Amended and Restated Voting Trust Agreement with Wilmington Savings Fund Society, FSB (the Trustee), pursuant to which the Selling Stockholders deposited 3,300,000 shares of Common Stock in the Project Hurricane Consideration Voting Trust 2026 (the Trust) and granted to the Trustee, subject to certain exceptions, voting rights with respect to such shares.

**Signature:** /s/ Jeffrey Wade, Attorney-in-Fact for David Nanus  
**Date:** 2026-03-04

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (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).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**