144: Issuer Information

Name of Issuer

Fluence Energy, Inc.

SEC File Number

001-40978

Address of Issuer

4601 Fairfax Drive, Suite 600
Arlington
VIRGINIA
22203

Phone

8333583623

Name of Person for Whose Account the Securities are To Be Sold

AES Grid Stability, LLC

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

Affiliate

144: Securities Information

Title of the Class of Securities To Be Sold

Name and Address of the Broker

Number of Shares or Other Units To Be Sold

Aggregate Market Value

Number of Shares or Other Units Outstanding

Approximate Date of Sale

Name the Securities Exchange

Class A common stock

Goldman Sachs International
Plumtree Court
25 Shoe Lane
London X0 EC4A 2AU

15000000

377850000.00

132811490

06/22/2026

NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class

Date you Acquired

Nature of Acquisition Transaction

Name of Person from Whom Acquired

Is this a Gift?

Date Donor Acquired

Amount of Securities Acquired

Date of Payment

Nature of Payment *

Class A common stock

10/27/2021

Private placement (1)

(1)

58586695

10/27/2021

(1)

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller

Title of Securities Sold

Date of Sale

Amount of Securities Sold

Gross Proceeds

AES Grid Stability, LLC
4300 Wilson Boulevard
Arlington VA 22203

Class A common stock

05/15/2026

10066414

211394694.00

144: Remarks and Signature

Remarks

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.

Date of Notice

06/22/2026

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

/s/ Jennifer V. Gillcrist, Secretary of AES Grid Stability, LLC

144: Filer Information

Submission Contact Information

144: Issuer Information

144: Securities Information

144: Securities To Be Sold

144: Securities Sold During The Past 3 Months

144: Remarks and Signature

ATTENTION:

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)