Organization and Operations	9 Months Ended
Jun. 30, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Operations	Organization and Operations Fluence Energy, Inc., a Delaware corporation (the “Company”), was formed on June 21, 2021. We conduct our business operations through Fluence Energy, LLC, and its direct and indirect subsidiaries. Fluence Energy, LLC was formed on June 30, 2017 as a joint venture between Siemens Industry, Inc. (“Siemens Industry”), an indirect subsidiary of Siemens AG (“Siemens”), and AES Grid Stability, LLC (“AES Grid Stability”), an indirect subsidiary of The AES Corporation (“AES”), and commenced operations on January 1, 2018. We refer to Siemens Industry and AES Grid Stability as the “Founders” in this Quarterly Report on Form 10-Q for the period ended June 30, 2026 (this “Report”). Fluence Energy, Inc. is a holding company whose sole material assets are the limited liability company interests (the “LLC Interests”) in Fluence Energy, LLC. All of our business is conducted through Fluence Energy, LLC, together with its subsidiaries, and the financial results of Fluence Energy, LLC are consolidated in our financial statements. Fluence Energy, LLC is taxed as a partnership for federal income tax purposes and, as a result, its members, including Fluence Energy, Inc., pay income taxes with respect to their allocable shares of its net taxable income. As of June 30, 2026, Fluence Energy, LLC had subsidiaries operating in Germany, Australia, Philippines, Chile, the Netherlands, the United States, India, Singapore, United Kingdom, Canada, Taiwan, Ireland, Japan, Italy, and Switzerland. Except where the context clearly indicates otherwise, “Fluence,” “we,” “us,” “our,” or the “Company” refers to Fluence Energy, Inc. and all of its direct and indirect subsidiaries, including Fluence Energy, LLC. The Company’s fiscal year begins on October 1 and ends on September 30. References to “fiscal year 2025” and “fiscal year 2026” refer to the twelve months ended September 30, 2025 and ending September 30, 2026, respectively. The Company’s chief operating decision maker (“CODM”) is its Chief Executive Officer. The Company’s CODM reviews financial information on a consolidated basis for purposes of making operating decisions, allocating resources, and evaluating financial performance. As such, the Company has determined that it operates in one operating segment, which corresponds to one reportable segment. The CODM uses gross margin, earnings before interest, taxes, depreciation and amortization (“EBITDA”), and consolidated net income (loss) to assess performance for the Company, monitor budget versus actual results, and determine how to allocate resources. The Company has concluded that consolidated net income (loss) as reported in the condensed consolidated statements of operations is the measure of segment profit or loss. There are no other expense categories regularly provided to the CODM that are not already included in the financial statements included herein. Secondary Offering and AES Redemption of LLC Interests On May 15, 2026, AES Grid Stability, SPT Holding, SARL, and Qatar Holding LLC (collectively, the "Selling Stockholders") closed an underwritten public offering (the “Offering”) of 23,000,000 shares of the Company’s Class A common stock par value $0.00001 per share (“Class A common stock”) by the Selling Stockholders. The Company did not sell any shares in the Offering and did not receive any proceeds from the sale of shares by the Selling Stockholders. Pursuant to the terms of the Company’s Registration Rights Agreement, dated as of November 1, 2021, by and among the Company and the Original Equity Owners (as defined therein), the Company paid approximately $0.5 million in certain expenses of the Selling Stockholders related to the Offering, which are included in “General and administrative” expenses in the accompanying condensed consolidated statements of operations for the three and nine months ended June 30, 2026, while the Selling Stockholders paid all applicable underwriting discounts and commissions. In conjunction with the Offering, AES Grid Stability exercised its redemption right under the Third Amended and Restated Limited Liability Agreement of Fluence Energy, LLC, dated October 27, 2021, as may be amended from time to time (the “LLC Agreement”), with respect to 10,066,414 LLC Interests, together with the corresponding cancellation of an equivalent number of shares of the Company's Class B-1 common stock, par value $0.00001 per share (the "AES Redemption"). The Company elected to settle the AES Redemption through the issuance of 10,066,414 newly issued shares of Class A common stock and settlement occurred on May 15, 2026. The AES Redemption increased the beneficial ownership interest of the Company in Fluence Energy, LLC to 77.54% as of May 15, 2026. The impact of the change in ownership interest did not result in a change in control. The transaction has been accounted for as an equity transaction and the carrying amount of non-controlling interest has been adjusted.

Fluence Energy, Inc., a Delaware corporation (the “Company”), was formed on June 21, 2021. We conduct our business operations through Fluence Energy, LLC, and its direct and indirect subsidiaries. Fluence Energy, LLC was formed on June 30, 2017 as a joint venture between Siemens Industry, Inc. (“Siemens Industry”), an indirect subsidiary of Siemens AG (“Siemens”), and AES Grid Stability, LLC (“AES Grid Stability”), an indirect subsidiary of The AES Corporation (“AES”), and commenced operations on January 1, 2018. We refer to Siemens Industry and AES Grid Stability as the “Founders” in this Quarterly Report on Form 10-Q for the period ended June 30, 2026 (this “Report”).

Fluence Energy, Inc. is a holding company whose sole material assets are the limited liability company interests (the “LLC Interests”) in Fluence Energy, LLC. All of our business is conducted through Fluence Energy, LLC, together with its subsidiaries, and the financial results of Fluence Energy, LLC are consolidated in our financial statements. Fluence Energy, LLC is taxed as a partnership for federal income tax purposes and, as a result, its members, including Fluence Energy, Inc., pay income taxes with respect to their allocable shares of its net taxable income. As of June 30, 2026, Fluence Energy, LLC had subsidiaries operating in Germany, Australia, Philippines, Chile, the Netherlands, the United States, India, Singapore, United Kingdom, Canada, Taiwan, Ireland, Japan, Italy, and Switzerland. Except where the context clearly indicates otherwise, “Fluence,” “we,” “us,” “our,” or the “Company” refers to Fluence Energy, Inc. and all of its direct and indirect subsidiaries, including Fluence Energy, LLC.

The Company’s fiscal year begins on October 1 and ends on September 30. References to “fiscal year 2025” and “fiscal year 2026” refer to the twelve months ended September 30, 2025 and ending September 30, 2026, respectively.

The Company’s chief operating decision maker (“CODM”) is its Chief Executive Officer. The Company’s CODM reviews financial information on a consolidated basis for purposes of making operating decisions, allocating resources, and evaluating financial performance. As such, the Company has determined that it operates in one operating segment, which corresponds to one reportable segment. The CODM uses gross margin, earnings before interest, taxes, depreciation and amortization (“EBITDA”), and consolidated net income (loss) to assess performance for the Company, monitor budget versus actual results, and determine how to allocate resources. The Company has concluded that consolidated net income (loss) as reported in the condensed consolidated statements of operations is the measure of segment profit or loss. There are no other expense categories regularly provided to the CODM that are not already included in the financial statements included herein.

On May 15, 2026, AES Grid Stability, SPT Holding, SARL, and Qatar Holding LLC (collectively, the "Selling Stockholders") closed an underwritten public offering (the “Offering”) of 23,000,000 shares of the Company’s Class A common stock par value $0.00001 per share (“Class A common stock”) by the Selling Stockholders. The Company did not sell any shares in the Offering and did not receive any proceeds from the sale of shares by the Selling Stockholders. Pursuant to the terms of the Company’s Registration Rights Agreement, dated as of November 1, 2021, by and among the Company and the Original Equity Owners (as defined therein), the Company paid approximately $0.5 million in certain expenses of the Selling Stockholders related to the Offering, which are included in “General and administrative” expenses in the accompanying condensed consolidated statements of operations for the three and nine months ended June 30, 2026, while the Selling Stockholders paid all applicable underwriting discounts and commissions.

In conjunction with the Offering, AES Grid Stability exercised its redemption right under the Third Amended and Restated Limited Liability Agreement of Fluence Energy, LLC, dated October 27, 2021, as may be amended from time to time (the “LLC Agreement”), with respect to 10,066,414 LLC Interests, together with the corresponding cancellation of an equivalent number of shares of the Company's Class B-1 common stock, par value $0.00001 per share (the "AES Redemption"). The Company elected to settle the AES Redemption through the issuance of 10,066,414 newly issued shares of Class A common stock and settlement occurred on May 15, 2026.