Exhibit 10.1

Execution Version

WARRANT ASSIGNMENT AND ASSUMPTION AGREEMENT

RENEW ENERGY GLOBAL PLC,

RMG ACQUISITION CORPORATION II,

CONTINENTAL STOCK TRANSFER & TRUST COMPANY,

COMPUTERSHARE, INC.

and

COMPUTERSHARE TRUST COMPANY, N.A.

Dated August 23, 2021

This Assignment and Assumption Agreement (the “Agreement”) is entered into as of August 23, 2021 (the “Effective Date”), by and among RMG Acquisition Corporation II, a Cayman Islands exempted company (“RMG II”), ReNew Energy Global plc, a public limited company incorporated under the laws of England and Wales (“ReNew Global”), Continental Stock Transfer & Trust Company, a New York corporation (“Continental”) and Computershare Inc., a Delaware corporation, and its wholly owned subsidiary, Computershare Trust Company, N.A., a federally chartered trust company (collectively, “Computershare”).

WHEREAS, RMG II and the Warrant Agent have previously entered into a warrant agreement, dated as of December 9, 2020 (attached hereto as Annex I, the “Warrant Agreement”; capitalized terms used but not otherwise defined herein shall have the meanings given to such terms in the Business Combination Agreement (as defined below)) governing the terms of RMG II’s outstanding warrants to purchase ordinary shares of RMG II (the “RMG II Warrants”);

WHEREAS, RMG II entered into a Business Combination Agreement, dated as of February 24, 2021 (as may be amended from time to time, the “Business Combination Agreement”), with ReNew Global, Renew Power Private Limited, a company with limited liability incorporated under the laws of India (“ReNew”), Philip Kassin, solely in the capacity as the representative for the shareholders of RMG II, ReNew Power Global Merger Sub, a Cayman Islands exempted company (the “Merger Sub”) and certain of the shareholders of ReNew (the “ReNew Shareholders”), pursuant to which, among other things, in connection with the closing of the transactions contemplated by the Business Combination Agreement (“Closing”), (i) Merger Sub will merge with and into RMG II (the “Merger”) with RMG II being the surviving entity of the Merger and becoming a wholly-owned subsidiary of ReNew Global and (ii) ReNew Global will acquire shares of ReNew and ReNew Global will issue shares to certain of the ReNew Shareholders, as described in the Business Combination Agreement (the “Share Exchange”, and together with the Merger, the “Transactions”).

WHEREAS, effective upon the consummation of the Merger, (i) each RMG II ordinary share outstanding on the closing date will be cancelled in exchange for the issuance by ReNew Global

of one Class A ordinary share of ReNew Global (“ReNew Global Class A Ordinary Shares”), except that holders of RMG II ordinary shares sold in RMG II’s initial public offering will be entitled to elect instead to receive a pro rata portion of RMG II’s trust account, as provided in RMG II’s amended and restated memorandum and articles of association (“M&A”), (ii) each outstanding warrant issued by RMG II as part of the units in RMG II’s initial public offering (the “Public Warrants”) will remain outstanding and, in accordance with the Amended and Restated Warrant Agreement to be entered into by and between ReNew Global and Computershare in connection with Closing (the “Amended and Restated Warrant Agreement”), will be automatically adjusted to entitle the holder to subscribe for 1.0917589 ReNew Global Class A Ordinary Shares at a price of $11.50 per 1.0917589 ReNew Global Class A Ordinary Shares, subject to adjustment as set forth in the Amended and Restated Warrant Agreement and (iii) each outstanding warrant issued by RMG II as part of a private placement (the “Private Placement Warrants”) will remain outstanding and, in accordance with the Amended and Restated Warrant Agreement, will be automatically adjusted to entitle the holder to subscribe for 1.0917589 ReNew Global Class A Ordinary Shares at a price of $11.50 per 1.0917589 ReNew Global Class A Ordinary Shares, subject to adjustment as set forth in the Amended and Restated Warrant Agreement;

WHEREAS, in connection with the foregoing, RMG II, ReNew Global, Continental and Computershare wish that i) ReNew Global shall assume by way of assignment and assumption all of the liabilities, duties and obligations of RMG II under and in respect of the Warrant Agreement, ii) appoint Computershare as successor warrant agent under the Warrant Agreement and that RMG II and the Warrant Agent shall be released from all obligations to each other under the Warrant Agreement; and

WHEREAS, Continental consents to the assignment and assumption of the Warrant Agreement from RMG II to ReNew Global and wishes to release RMG II from its obligations under and in respect of the Warrant Agreement and RMG II consents to the assignment and assumption of the Warrant Agreement from Continental to Computershare and wishes to release Continental from its obligations under and in respect of the Warrant Agreement.

NOW, THEREFORE, the parties hereby agree as follows:

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IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed as of the date first above written.

[Signature Page to Warrant Assignment and Assumption Agreement]