SEC Form S-8 filed by Fluence Energy Inc.

As filed with the Securities and Exchange Commission on November 25, 2025

Registration No. 333-               

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-8

REGISTRATION STATEMENT

Under

The Securities Act of 1933

Fluence Energy, Inc.

(Exact name of registrant as specified in its charter)

4601 Fairfax Drive, Suite 600

Arlington, Virginia 22203

(Address of principal executive offices) (Zip code)

Fluence Energy, Inc. 2021 Incentive Award Plan

(Full title of the plan)

Julian Nebreda

Chief Executive Officer and President

4601 Fairfax Drive, Suite 600

Arlington, Virginia 22203

(Name and address of agent for service)

Telephone: (833) 358-3623

(Telephone number, including area code, of agent for service)

Copies to:

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ¨

EXPLANATORY NOTE

This Registration Statement on Form S-8 is being filed for the purpose of registering an additional 1,975,940 shares of Class A common stock of Fluence Energy, Inc. (the “Registrant” or the “Company”) to be issued pursuant to the Fluence Energy, Inc. 2021 Incentive Award Plan (the “Incentive Plan”) that have become or may become available for issuance under the Incentive Plan pursuant to the provisions of the Incentive Plan as a result of the forfeiture or expiration of awards. A Registration Statement of the Registrant on Form S-8 relating to the Incentive Plan is effective.

INCORPORATION BY REFERENCE OF CONTENTS OF

REGISTRATION STATEMENTS ON FORM S-8

Except as set forth below, the contents of the Registration Statement on Form S-8 (File No. 333-260544), including any amendments thereto, filed with the Securities and Exchange Commission (the “Commission”), relating to the Incentive Plan, are incorporated by reference herein.

+ Filed herewith

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Arlington, Virginia, on the 25^th day of November, 2025.

SIGNATURES AND POWER OF ATTORNEY

Each person whose signature appears below constitutes and appoints each of Julian Nebreda and Ahmed Pasha, acting alone or together with another attorney-in-fact, as his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubtitution, for such person and in his or her name, place and stead, and in any and all capacities, to sign any and all amendments (including post-effective amendments) to this Registration Statement, and every act and thing requisite or necessary to be done in and about the premises, as fully and to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities and on the date indicated.