SCHEDULE 13G/A 0001021944 XXXXXXXX LIVE 2 Class A common stock, par value $0.0001 per share 09/30/2025 0001819142 SES AI Corporation 78397Q109 35 Cabot Road Woburn MA 01801 Rule 13d-1(c) Temasek Holdings (Private) Limited U0 0.00 3160712 0.00 0.00 3160712 N 1.0 HC Based on 320,896,206 shares of Class A common stock of SES AI Corporation (the "Issuer") outstanding as of August 25, 2025, as set forth in the Issuer's definitive proxy statement on Schedule 14A filed with the Securities and Exchange Commission (the "Commission") on September 9, 2025 (the "Proxy Statement"). Tembusu Capital Pte. Ltd. U0 0.00 2595854 0.00 0.00 2595854 N 0.8 HC Based on 320,896,206 shares of the Issuer's Class A common stock outstanding as of August 25, 2025, as set forth in the Issuer's Proxy Statement. Thomson Capital Pte. Ltd. U0 0.00 2595854 0.00 0.00 2595854 N 0.8 HC Based on 320,896,206 shares of Class A common stock of the Issuer outstanding as of August 25, 2025, as set forth in the Issuer's Proxy Statement. Anderson Investments Pte. Ltd. U0 0.00 2595854 0.00 0.00 2595854 N 0.8 HC Based on 320,896,206 shares of Class A common stock of the Issuer outstanding as of August 25, 2025, as set forth in the Issuer's Proxy Statement SES AI Corporation 35 Cabot Road, Woburn, MA 01801 This Schedule 13G is being jointly filed by the following reporting persons (each a "Reporting Person" and collectively, the "Reporting Persons"): (i) Temasek Holdings (Private) Limited ("Temasek"); (ii) Tembusu Capital Pte. Ltd. ("Tembusu"); (iii) Thomson Capital Pte. Ltd. ("Thomson"); (iv) Anderson Investments Pte. Ltd. ("Anderson", and, together with Temasek, Tembusu and Thomson, the "Reporting Persons"). Each of the Reporting Persons: 60B Orchard Road #06-18 The Atrium@Orchard Singapore 238891. Each of the Reporting Persons: Republic of Singapore. Y Anderson has the right to acquire 2,595,854 shares of the Issuer's Class A common stock (the "Earnout Shares"), upon the achievement of certain stock price performance targets, pursuant to the Business Combination Agreement, as amended, by and among the Issuer, SES Holdings Pte. Ltd., a Singapore private company limited by shares, and Wormhole Amalgamation Sub Pte. Ltd., a Singapore private company limited by shares, and a direct, wholly-owned subsidiary of the Issuer (the "Business Combination Agreement"). Prior to the vesting of these shares, Anderson has the power to vote, but not dispose of, the Earnout Shares. Anderson is a wholly-owned subsidiary of Thomson, which is a wholly-owned subsidiary of Tembusu, which is a wholly-owned subsidiary of Temasek. Each of Thomson, Tembusu and Temasek, through the ownership described herein, may be deemed to beneficially own the shares held by Anderson. Temasek, through the ownership described herein and the indirect 100% ownership of one other entity that directly owned 564,858 Earnout Shares, may be deemed to beneficially own in aggregate 3,160,712 shares of the Issuer's Class A common stock, including the 2,595,854 Earnout Shares directly owned by Anderson. As of November 6, 2025: Temasek: 1.0% Tembusu, Thomson and Anderson: 0.8% Based on 320,896,206 shares of Class A common stock of the Issuer outstanding as of August 25, 2025, as set forth in the Issuer's Proxy Statement. 0.00 Temasek: 3,160,712 Tembusu, Thomson and Anderson: 2,595,854 0.00 0.00 N Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. Temasek Holdings (Private) Limited /s/ Jason Norman Lee 11/10/2025 Tembusu Capital Pte. Ltd. /s/ Gregory Tan 11/10/2025 Thomson Capital Pte. Ltd. /s/ Ng JianZhong 11/10/2025 Anderson Investments Pte. Ltd. /s/ Tan Yee Pin, Stanley 11/10/2025