SCHEDULE 13G/A 0000940418 XXXXXXXX LIVE 3 Class A common stock, $0.00001 par value 12/31/2025 0001868941 Fluence Energy, Inc. 34379V103 4601 Fairfax Drive, Suite 600 Arlington VA 22203 Rule 13d-1(d) SPT Invest Management Sarl a N4 0.00 0.00 0.00 0.00 0.00 N 0.00 OO SPT Holding Sarl a N4 0 31761131 0 31761131 31761131 N 24.0 OO Siemens Pension-Trust e.V. a 2M 0 31761131 0 31761131 31761131 N 24.0 OO Siemens AG a 2M 19738064 31761131 19738064 31761131 51499195 N 38.9 OO Fluence Energy, Inc. 4601 Fairfax Drive, Suite 600, Arlington, Virginia 22203 This Schedule 13G is filed on behalf of SPT Invest Management Sarl ("SPT IM"), SPT Holding Sarl ("SPT Holding"), Siemens Pension-Trust e.V. ("Siemens e.V.") and Siemens AG ("SAG" together with SPT IM, SPT Holding and Siemens e.V. (the "Reporting Persons"). The business address of SPT IM and SPT Holding is 21 Rue Edmond Reuter, Contern Luxembourg 5326. The business address of Siemens e.V. is Wittelsbacher Platz 2, 80333 Munich, Germany. The business address of SAG is Werner-von-Siemens-Strasse 1, 80333 Munich, Germany. SPT IM and SPT Holding are organized under the laws of Luxembourg. SAG and Siemens e.V. are organized under the laws of Germany. Y The information contained in rows 5, 6, 7, 8, 9, 10, and 11 on each of the cover pages of this Schedule 13G is incorporated by reference in its entirety into this Item 4. As of December 31, 2025, SAG is the record holder of 19,738,064 shares of Class A common stock, $0.00001 par value ("Class A Common Stock") of Fluence Energy, Inc. (the "Issuer") and SPT Holding is the record holder of 31,761,131 shares of Class A Common Stock. SPT Holding is a wholly owned subsidiary of Siemens e.V. and as such, Siemens e.V. may be deemed to share beneficial ownership of the shares of Class A Common Stock beneficially owned by SPT Holding. SAG is an affiliate of Siemens e.V. and as such, may be deemed to share beneficial ownership of the shares of Class A Common Stock beneficially owned by Siemens e.V. Such beneficial ownership represents in the aggregate 38.9% of the total Class A Common Stock of the Issuer outstanding, based on 132,220,374 shares of Class A Common Stock of the Issuer outstanding as of December 31, 2025, as reflected in the Issuer's Quarterly Report on Form 10-Q, which was filed with the Securities and Exchange Commission on February 4, 2026. SPT IM no longer beneficially owns any shares of Class A Common Stock. As such, this Schedule 13G serves as an exit filing for SPT IM and an initial filing for SPT Holding. The Reporting Persons, AES Grid Stability, LLC and Qatar Holding LLC (collectively, the "Stockholders") are parties to a Stockholder Agreement (the "Stockholder Agreement"), which contains, among other things, certain provisions relating to transfer of, and coordination of the voting of, securities of the Issuer by the parties thereto. By virtue of the Stockholder Agreement and the obligations and rights thereunder, the Reporting Persons acknowledge and agree that they are acting as a "group" with the other Stockholders within the meaning of Section 13(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"). Based in part on information provided by or on behalf of such other Stockholders, as of December 31, 2025, such a "group" would be deemed to beneficially own an aggregate of 117,666,665 shares of Class A Common Stock, or 64.0% of the Class A Common Stock of the Issuer, calculated pursuant to Rule 13d-3. The Reporting Persons expressly disclaim beneficial ownership over any shares of Class A Common Stock that they may be deemed to beneficially own solely by reason of the Stockholder Agreement. Certain entities affiliated with the other Stockholders separately file Schedule 13G filings reporting their beneficial ownership of shares of Class A Common Stock. See responses to Item 11 on each cover page and Item 4(a) above. See responses to Item 5 on each cover page and Item 4(a) above. See responses to Item 6 on each cover page and Item 4(a) above. See responses to Item 7 on each cover page and Item 4(a) above. See responses to Item 8 on each cover page and Item 4(a) above. N Y Y N See Item 4(a) above. Y Y LIST OF EXHIBITS Exhibit No. Description 1 Joint Filing Agreement. SPT Invest Management Sarl /s/ Thomas Gruenewald 02/09/2026 /s/ Denis Stoffel 02/09/2026 SPT Holding Sarl /s/ Thomas Gruenewald 02/09/2026 /s/ Denis Stoffel 02/09/2026 Siemens Pension-Trust e.V. /s/ Dr. Peter Rathgeb 02/09/2026 /s/ Heiko Fischer 02/09/2026 Siemens AG /s/ Sabine Kalbitz 02/09/2026 /s/ Hardi Zajewski 02/09/2026