FLNC

Reflects shares transferred to Siemens Pension-Trust e.V., which wholly owns SPT Holding Sarl. The transfer was exempt from reporting by SPT Holding, SARL, Siemens Pension-Trust e.V., Siemens AG and their affiliates under Rule 16a-13 of the Securities Exchange Act of 1934, as amended. Such transfer does not represent any change to the aggregate number of shares of Issuer Class A Common Stock beneficially owned by Siemens Pension-Trust e.V., Siemens AG and its subsidiaries.

These shares are directly owned by SPT Holding Sarl. SPT Holding Sarl is a wholly owned subsidiary of Siemens Pension-Trust e.V. Siemens AG is an affiliate of Siemens Pension-Trust e.V. and may be deemed to share beneficial ownership of the shares of Class A Common Stock beneficially owned by Siemens Pension-Trust e.V.

The sales reported in this Form 4 were effected pursuant to an existing Rule 10b5-1 trading plan adopted by the reporting person on March 20, 2026. 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 sales of shares is a permissible exemption under the terms of the lock-up agreement.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple open market transactions at prices ranging from $21.24 to $22.94, inclusive. The reporting person undertakes to provide to Fluence, any security holder of Fluence, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range indicated in this footnote.

The sales reported in this Form 4 were effected pursuant to an existing Rule 10b5-1 trading plan adopted by the reporting person on March 20, 2026. 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 sales of shares is a permissible exemption under the terms of the lock-up agreement.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple open market transactions at prices ranging from $24.52 to $25.63, inclusive. The reporting person undertakes to provide to Fluence Energy, Inc. ("Fluence"), any security holder of Fluence, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range indicated in this footnote.

The sale reported in this Form 4 was effected pursuant to an existing Rule 10b5-1 trading plan adopted by the reporting person on March 16, 2026. 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"). The sale of shares is a permissible exemption under the terms of the lock-up agreement.

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.

The OpCo Units and an equal number of shares of Class B-1 Common Stock, together are exchangeable at the discretion of the holder for, at the Issuer's election, shares of Class A Common Stock on a one-for-one basis or the cash value thereof, subject to certain exceptions, conditions and adjustments, and have no expiration date.

On May 15, 2026, AES Grid Stability, LLC ("AES Grid Stability"), a wholly owned, indirect subsidiary of The AES Corporation, exercised its redemption right with respect to 10,066,414 LLC Units of Fluence Energy, LLC ("OpCo Units") together with the corresponding cancellation of 10,066,414 shares of Class B-1 Common Stock of Fluence Energy, Inc. AES Grid Stability exercised such redemption right as a result of AES Grid Stability's and The AES Corporation's determination to sell 10,066,414 shares Class A Common Stock in an underwritten offering.

The OpCo Units and an equal number of shares of Class B-1 Common Stock, together are exchangeable at the discretion of the holder for, at the Issuer's election, shares of Class A Common Stock on a one-for-one basis or the cash value thereof, subject to certain exceptions, conditions and adjustments, and have no expiration date.

On May 15, 2026, Qatar Holding LLC sold shares of Class A Common Stock of the Issuer in an aggregate amount equal to $60,210,612 at $21.00 per share.

Qatar Holding LLC is the direct holder of the securities reflected in this Form 4. Qatar Investment Authority is the ultimate parent of Qatar Holding LLC.

The OpCo Units and an equal number of shares of Class B-1 Common Stock, together are exchangeable at the discretion of the holder for, at the Issuer's election, shares of Class A Common Stock on a one-for-one basis or the cash value thereof, subject to certain exceptions, conditions and adjustments, and have no expiration date.

The OpCo Units are held by AES Grid Stability, LLC, which is a wholly owned subsidiary of The AES Corporation.

This amount represents the $20.5275 sale price per share of Class A common stock, $0.00001 par value ("Class A Common Stock") of the Issuer in a secondary offering.

These shares are directly owned by SPT Holding Sarl. SPT Holding Sarl is a wholly owned subsidiary of Siemens Pension-Trust e.V. Siemens AG is an affiliate of Siemens Pension-Trust e.V. and may be deemed to share beneficial ownership of the shares of Class A Common Stock beneficially owned by Siemens Pension-Trust e.V.

The sales reported on this Form 4 represent the number of shares sold by the Reporting Person to cover tax obligations in connection with the vesting of RSUs.

This transaction was executed in multiple trades at prices ranging from $16.49 to $16.56, inclusive. The price reported above reflects the weighted average sales price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

The RSUs vested in full on March 17, 2026. The RSUs had no expiration date.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

The RSUs vested in full on March 17, 2026. The RSUs had no expiration date.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

The RSUs vested in full on March 17, 2026. The RSUs had no expiration date.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

The RSUs vested in full on March 17, 2026. The RSUs had no expiration date.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

The RSUs will vest in full on March 12, 2027, the first anniversary of the date of grant, subject to the reporting person's continued service on the Board of Directors of the Issuer through the applicable vesting date. The RSUs have no expiration date.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

The RSUs will vest in full on March 12, 2027, the first anniversary of the date of grant, subject to the reporting person's continued service on the Board of Directors of the Issuer through the applicable vesting date. The RSUs have no expiration date.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

The RSUs will vest in full on March 12, 2027, the first anniversary of the date of grant, subject to the reporting person's continued service on the Board of Directors of the Issuer through the applicable vesting date. The RSUs have no expiration date.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

The RSUs will vest in full on March 12, 2027, the first anniversary of the date of grant, subject to the reporting person's continued service on the Board of Directors of the Issuer through the applicable vesting date. The RSUs have no expiration date.

Non-qualified stock options vest in three equal annual installments beginning on the first anniversary of the grant date, subject to continued service with the Issuer through the applicable vesting date.

Non-qualified stock options vest in three equal annual installments beginning on the first anniversary of the grant date, subject to continued service with the Issuer through the applicable vesting date.

Non-qualified stock options vest in three equal annual installments beginning on the first anniversary of the grant date, subject to continued service with the Issuer through the applicable vesting date.

Non-qualified stock options vest in three equal annual installments beginning on the first anniversary of the grant date, subject to continued service with the Issuer through the applicable vesting date.

Non-qualified stock options vest in three equal annual installments beginning on the first anniversary of the grant date, subject to continued service with the Issuer through the applicable vesting date.

Non-qualified stock options vest in three equal annual installments beginning on the first anniversary of the grant date, subject to continued service with the Issuer through the applicable vesting date.

Non-qualified stock options vest in three equal annual installments beginning on the first anniversary of the grant date, subject to continued service with the Issuer through the applicable vesting date.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

The reporting person was granted 32,705 RSUs on January 1, 2024. The vesting schedule is as follows: 1/3 of the total RSUs vested on January 1, 2025, 1/3 of the total RSUs vested on January 1, 2026, and 1/3 of the total RSUs will vest on January 1, 2027, subject to continued service through such vesting date. The RSUs have no expiration date.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

Represents the number of shares of Class A Common Stock that have been withheld to satisfy tax withholding obligations in connection with the vesting of the RSUs.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

The RSUs vest in three equal annual installments with the first installment having vested on December 18, 2025, the second installment vesting on December 18, 2026 and the final installment vesting on December 18, 2027, subject to Reporting Person's continued service with the Issuer through the applicable vesting date.

Represents the number of shares of Class A Common Stock that have been withheld to satisfy tax withholding obligations in connection with the vesting of the RSUs.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

Represents the number of shares of Class A Common Stock that have been withheld to satisfy tax withholding obligations in connection with the vesting of the RSUs.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

The RSUs vest in two equal annual installments with the first installment having vested on December 18, 2025 and the second installment vesting on December 18, 2026, subject to Reporting Person's continued service with the Issuer through the applicable vesting date.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

The RSUs vest in three equal annual installments with the first installment having vested on December 18, 2025, the second installment vesting on December 18, 2026 and the final installment vesting on December 18, 2027, subject to Reporting Person's continued service with the Issuer through the applicable vesting date.

Represents the number of shares of Class A Common Stock that have been withheld to satisfy tax withholding obligations in connection with the vesting of the RSUs.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

Represents the number of shares of Class A Common Stock that have been withheld to satisfy tax withholding obligations in connection with the vesting of the RSUs.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

The RSUs vest in three equal annual installments with the first installment having vested on December 18, 2025, the second installment vesting on December 18, 2026 and the final installment vesting on December 18, 2027, subject to Reporting Person's continued service with the Issuer through the applicable vesting date.

Represents the number of shares of Class A Common Stock that have been withheld to satisfy tax withholding obligations in connection with the vesting of the RSUs.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A Common Stock of the Issuer.

The RSUs vest in three equal annual installments with the first installment having vested on December 18, 2025, the second installment vesting on December 18, 2026 and the final installment vesting on December 18, 2027, subject to Reporting Person's continued service with the Issuer through the applicable vesting date.