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(Loss) income per Share
 9 Months Ended
Jun. 30, 2026
Earnings Per Share [Abstract]  
(Loss) income per Share Loss) income per Share
As of June 30, 2026, the Company has two classes of common stock outstanding, Class A and Class B-1. (Loss) income per share is calculated and reported under the “two-class” method. The “two-class” method is an earnings allocation method under which (loss) income per share is calculated for each class of common stock considering both distributions declared or accumulated and participation rights in undistributed earnings as if all such (loss) income had been distributed during the period.
Basic (loss) income per share of Class A common stock is computed by dividing net (loss) income attributable to Class A common stockholders by the weighted average number of shares of Class A common stock outstanding during the period. Diluted (loss) income per share of Class A common stock is computed by adjusting the net (loss) income available to Class A common stockholders and the weighted average shares of Class A common stock outstanding to give effect to potentially dilutive securities. Shares of our Class B-1 common stock are not entitled to receive any distributions or dividends. When an LLC Interest of Fluence Energy, LLC is redeemed for cash or Class A common stock by a Founder who holds shares of our Class B-1 common stock, such Founder will be required to surrender a share of Class B-1 common stock, as the case may be, which we will cancel for no consideration. In the event of cash settlement, the Company is required to issue new shares of Class A common stock and use the proceeds from the sale of these newly-issued shares of Class A common stock to fully fund the cash settlement. Therefore, we did not include shares of our Class B-1 common stock in the computation of basic (loss) income per share.
In periods in which we have a loss, diluted loss per share is equal to basic loss per share because the effect of potentially dilutive securities would be antidilutive.
The following table presents the potentially dilutive securities that were excluded from the computation of diluted (loss) income per share:
Three Months Ended June 30,Nine Months Ended June 30,
2026202520262025
Class B-1 common stock41,432,781 — 41,432,781 51,499,195 
Shares underlying the conversion option in the 2030 Convertible Senior Notes18,738,880 18,738,880 18,738,880 18,738,880 
Outstanding pre-IPO options issued pursuant to the 2020 Unit Option Plan1,205,058 1,222,197 1,205,058 2,376,486 
Outstanding restricted stock units (“RSUs”)1,649,622 2,431,460 1,649,622 2,595,352 
Outstanding performance share units (“PSUs”)964,545 986,767 964,545 986,767 
Outstanding non-qualified stock options 623,653 472,381 623,653 472,381 
Basic and diluted (loss) income per share of Class A common stock for the three and nine months ended June 30, 2026 and 2025, respectively, have been computed as follows:
Three Months Ended June 30,
20262025
In thousands, except share and per share amountsLossShares$ per ShareIncomeShares$ per Share
Basic (loss) income per Share
Net (loss) income attributable to Fluence Energy, Inc.$(32,817)138,129,139 $(0.24)$6,252 130,723,258 $0.05 
Effect of Dilutive Securities
Class B-1 common stock— — (4,266)51,499,195 
Pre-IPO options— — — 1,197,408 
Phantom units— — — — 
RSUs— — — 225,632 
PSUs— — — — 
NQSOs— — — — 
Diluted (loss) income per Share
Net (loss) income attributable to Fluence Energy, Inc.$(32,817)138,129,139 $(0.24)$1,986 183,645,493 $0.01 
Nine Months Ended June 30,
20262025
In thousands, except share and per share amountsLossShares$ per ShareLossShares$ per Share
Basic loss per Share
Net loss attributable to Fluence Energy, Inc.$(98,814)134,060,941 $(0.74)$(66,260)130,062,109 $(0.51)
Diluted loss per Share
Net loss attributable to Fluence Energy, Inc.
$(98,814)134,060,941 $(0.74)$(66,260)130,062,109 $(0.51)