Sec Form 3 Filing - Mehta Balram @ ReNew Energy Global plc - 2026-03-18

FORM 3 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP 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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1. Name and Address of Reporting Person Mehta Balram 2. Issuer Name and Ticker or Trading Symbol ReNew Energy Global plc [ RNW] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) See below Remarks (a) (Last) (First) (Middle) C/O VISTRA (UK) LTD, SUITE 3, 7TH FLOOR, 50 BROADWAY 3. Date of Earliest Transaction (MM/DD/YY) 03/18/2026 (Street) LONDONSW1H 0DB 4. If Amendment, Date Original Filed (MM/DD/YY) 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 Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class A Ordinary Shares 82,359 ( 1 ) D Class A Ordinary Shares 1,363,704 I By ESOP

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Mehta Balram C/O VISTRA (UK) LTD SUITE 3, 7TH FLOOR, 50 BROADWAY LONDONSW1H 0DB See below Remarks (a) Signatures /s/ Balram Mehta 03/18/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Includes 27,712 vested restricted stock units ("RSUs") and 54,647 unvested RSUs. Each RSU represents a contingent right to receive one share of the Issuer's Class A Ordinary Shares. The RSUs were awarded on the following dates (each, a "Grant Date"): September 13, 2023 (27,631 RSUs awarded), April 1, 2024 (28,716 RSUs awarded) and April 1, 2025 (26,012 RSUs awarded). The vesting schedule for each of the foregoing awards, subject to the Reporting Person's continuous service through such dates, is 33% on each of the first and second anniversaries of the Grant Date, and 34% on the third anniversary of the Grant Date.

Remarks: (a) The Reporting Person is Group President, Services Business & Wind Projects. Exhibit 24.1 - Power of Attorney

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).

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