144 0001891368 XXXXXXXX LIVE 0001868941 Fluence Energy, Inc. 001-40978 4601 Fairfax Drive, Suite 600 Arlington VA 22203 8333583623 AES Grid Stability, LLC Affiliate Class A common stock Goldman Sachs International

Plumtree Court 25 Shoe Lane London X0 EC4A 2AU

15000000 377850000.00 132811490 06/22/2026 NASDAQ Class A common stock 10/27/2021 Private placement (1) (1) N 58586695 10/27/2021 (1) N AES Grid Stability, LLC

4300 Wilson Boulevard Arlington VA 22203

Class A common stock 05/15/2026 10066414 211394694.00 In accordance with procedures described in interpretive letters from staff of the SEC to Goldman, Sachs & Co., dated December 20, 1999, and to Bank of America, N.A., Merrill Lynch, Pierce, Fenner & Smith Inc., dated December 1, 2011, shares being sold are subject to a post-paid forward sale contract with a financial institution. At maturity, seller expects to deliver up to the number of shares described herein and receive a cash payment based on the VWAP of Class A shares during a valuation period determined by the financial institution, subject to an agreed maturity window. The final number of Class A shares delivered may be reduced if, during the valuation period, the VWAP is below a specified minimum price. The seller expects to pledge as collateral LLC Units and Class B-1 shares redeemable for Class A shares deliverable at settlement. Any related hedging activity would be conducted by or through the broker named herein. (1) See Annex A on Exhibit 99.1 hereto. 06/22/2026 /s/ Jennifer V. Gillcrist, Secretary of AES Grid Stability, LLC