X0609 4 2026-06-02 0 0001868941 Fluence Energy, Inc. FLNC 0001452008 Fessenden Elizabeth Anne false C/O FLUENCE ENERGY, INC. 4601 FAIRFAX DRIVE, SUITE 600 ARLINGTON VA 22203 1 0 0 0 0 Class A Common Stock 2026-06-02 4 G 0 1000 0 D 66250 D Reflects the gift of Class A common stock to a charitable donor advised fund. The reporting person is subject to a lock-up agreement that expires at the close of business on June 26, 2026, that was entered into with the representatives of the underwriters in connection with an underwritten public offering of the Issuer's Class A common stock (the "Offering"). This charitable contribution is a permissible exemption under the terms of the lock-up agreement. /s/ Leah Patterson as Attorney-in-fact for Elizabeth Anne Fessenden 2026-06-04