UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D/A

Under the Securities Exchange Act of 1934

(Amendment No. 1)*

ReNew Energy Global plc

(Name of Issuer)

Class A Ordinary Shares, par value $0.0001 per share

(Title of Class of Securities)

G7500M 104

(CUSIP Number)

Sumant Sinha

Commercial Block-1, Zone 6

Golf Course Road, DLF City Phase-V

Gurugram-122009, Haryana

India

(+91) 124 489 6670

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

November 18, 2022

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(e), Rule 13d-1(f) or Rule 13d-1(g), check the following box.  ☐

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7(b) for other parties to whom copies are to be sent.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

This Amendment No. 1 (the “Amendment”) amends and supplements the Schedule 13D filed by the Reporting Persons on September 2, 2021 (the “Original Schedule 13D” and, as amended and supplemented by this Amendment, the “Schedule 13D”). Except as specifically provided herein, this Amendment does not modify any of the information previously reported on the Original Schedule 13D. Capitalized terms not otherwise defined in this Amendment shall have the same meanings ascribed thereto in the Original Schedule 13D.

This Amendment No. 1 supplements Item 4 of the Original Schedule 13D by adding the following at the end of the section entitled “Registration Rights, Coordination and Put Option Agreement”:

As Founder Investors, the Reporting Persons have exercised the Founder Investor De Minimis Put Option.

This Amendment No. 1 amends and restates Item 5 of the Original Schedule 13D in its entirety as follows:

(a) – (b)

The following sets forth, as of the date of this Schedule 13D, the aggregate number of shares of Class A Ordinary Shares and percentage of Class A Ordinary Shares beneficially owned by each of the Reporting Persons, as well as the number of shares of Class A Ordinary Shares as to which each Reporting Person has the sole power to vote or to direct the vote, shared power to vote or to direct the vote, sole power to dispose or to direct the disposition of, or shared power to dispose or to direct the disposition of, as of the date hereof, based on 269,099,498 shares of Class A Ordinary Shares outstanding as reported by the Issuer on Post-Effective Amendment No. 2 to Form F-1 on Form F-3 filed by the Issuer with the SEC on October 13, 2022:

As of the date hereof, Mr. Sinha is the record holder of one Class B Ordinary Share, which represents voting rights equal to (i) 82 Class A Ordinary Shares that would have been issued to Mr. Sinha and his affiliates if Mr. Sinha and his affiliates had exchanged their existing ordinary shares in ReNew India that they hold at the relevant time for Class A Ordinary Shares at an exchange ratio of 1-to-0.8289, (ii) 6,498,328 Class A Ordinary Shares that would have been issued to Cognisa and its affiliates if Cognisa and its affiliates had exchanged their existing ordinary shares in ReNew India that they hold at the relevant time for Class A Ordinary Shares at an exchange ratio of 1-to-0.8289, and (iii) 7,056,269 Class A Ordinary Shares that would have been issued to Wisemore and its affiliates if Wisemore and its affiliates had exchanged their existing ordinary shares in ReNew India that they hold at the relevant time for Class A Ordinary Shares at an exchange ratio of 1-to-0.8289. Cognisa and Wisemore are directly owned and controlled by Mr. Sinha. As a result, Mr. Sinha may be deemed to share beneficial ownership over the securities held by each of Cognisa and Wisemore. In addition, Mr. Sinha is the record holder of 12,517,032 Class A Ordinary Shares issuable upon the exercise of options awarded to Mr. Sinha within 60 days from the date hereof.

(c) Except as described in this Schedule 13D, the Reporting Persons have not engaged in any transactions with respect to the Class A Ordinary Shares in the past sixty days.

(d) None.

(e) Not applicable.

SIGNATURES

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Date: November 21, 2022