ReNew Energy Global plc

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 September 16, 2026 Commission File Number: 001-40752

RENEW ENERGY GLOBAL PLC (Translation of registrant's name into English)

C/O Vistra (UK) Ltd, Suite 3, 7th Floor 50, Broadway, London, England, SW1H 0DB, United Kingdom (Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F. Form 20-F ☒ Form 40-F ☐

Other events Fifth Annual General Meeting voting results Gurugram, India; September 16, 2026: ReNew Energy Global Plc ("ReNew"or"the Company") (NASDAQ: RNW) announces that it held its fifth Annual General Meeting on Wednesday, September 16, 2026 at 11:30 a.m. BST at St. James' Court, the Taj, 54 Buckingham Gate, London, SW1E 6AF, United Kingdom. Each of the resolutions submitted to shareholders was approved with the requisite majority. All resolutions were passed as ordinary resolutions. Specifically, the shareholders (i) approved the Annual Reports and Accounts of the Company for the financial year ended March 31, 2026; (ii) approved the directors' remuneration report in respect of the financial year ended March 31, 2026; (iii) reappointed KNAV Limited as auditor of the Company to hold office until the conclusion of the next annual general meeting; and (iv) authorised the Board and its Audit Committee severally to determine the auditor's remuneration.

About ReNew Unless the context otherwise requires, all references in this press release to "we," "us,"or"our" refers to ReNew and its subsidiaries. ReNew is a leading decarbonization solutions company listed on Nasdaq (Nasdaq: RNW). ReNew's clean energy portfolio of ~20.5 GW (including 1.7 GW/6.2 GWh of BESS) on a gross basis as of July 31, 2026, is one of the largest globally. In addition to being a major independent power producer in India, we provide end-to-end solutions in a just and inclusive manner in the areas of clean energy, value-added energy offerings through digitalization, storage, and carbon markets that are increasingly integral to addressing climate change. In addition, ReNew has 6.4 GW of solar module and 2.5 GW of solar cell manufacturing capacities and is expanding its solar cells manufacturing capacity by another 4 GW, which is expected to be operational by December 2026. For more information, visit www.renew.com and follow us on LinkedIn, Facebook, X and Instagram. Press Enquiries pr@renew.com Investor Enquiries Anunay Shahi Nitin Vaid ir@renew.com