AQMS · Aqua Metals, Inc.

Represents the number of shares withheld and returned to the plan to cover the tax liability of the July 1, 2026 vesting of a previously reported restricted share grant represented in Table I.

Includes 24,727 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents the number of shares withheld and returned to the plan to cover the tax liability of the July 1, 2026 vesting of a previously reported restricted share grant represented in Table I.

Includes 81,522 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents the number of shares withheld and returned to the plan to cover the tax liability of the May 19, 2026 vesting of a previously reported restricted share grant represented in Table I.

Includes 31,102 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents the number of shares withheld and returned to the plan to cover the tax liability of the April 13, 2026 vesting of a previously reported restricted share grant represented in Table I.

Includes 32,803 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents the number of shares withheld and returned to the plan to cover the tax liability of the April 13, 2026 vesting of a previously reported restricted share grant represented in Table I.

Includes 26,482 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents the number of shares withheld and returned to the plan to cover the tax liability of the April 13, 2026 vesting of a previously reported restricted share grant represented in Table I.

Includes 87,192 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents the number of shares withheld and returned to the plan to cover the tax liability of the February 24, 2026 vesting of a previously reported restricted share grant represented in Table I.

Includes 34,840 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents the number of shares withheld and returned to the plan to cover the tax liability of the February 24, 2026 vesting of a previously reported restricted share grant represented in Table I.

Includes 92,745 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents the number of shares withheld and returned to the plan to cover the tax liability of the February 24, 2026 vesting of a previously reported restricted share grant represented in Table I.

Includes 28,170 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

The reporting person is reporting the acquisition of shares of the issuer's common stock pursuant to the Aqua Metals, Inc. 2026 Employee Stock Purchase Plan.

Includes 37,703 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

The reporting person is reporting the acquisition of shares of the issuer's common stock pursuant to the Aqua Metals, Inc. 2026 Employee Stock Purchase Plan.

Includes 30,543 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

The reporting person is reporting the acquisition of shares of the issuer's common stock pursuant to the Aqua Metals, Inc. 2026 Employee Stock Purchase Plan.

Includes 100,549 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents voluntary agreement to forfeit and cancel all outstanding performance stock units ("PSUs") previously granted and reported on Table II.

Represents voluntary agreement to forfeit and cancel all outstanding performance stock units ("PSUs") previously granted and reported on Table II.

Represents voluntary agreement to forfeit and cancel all outstanding performance stock units ("PSUs") previously granted and reported on Table II.

Represents voluntary agreement to forfeit and cancel all outstanding performance stock units ("PSUs") previously granted and reported on Table II.

Represents voluntary agreement to forfeit and cancel all outstanding performance stock units ("PSUs") previously granted and reported on Table II.

Represents voluntary agreement to forfeit and cancel unvested restricted stock units ("RSUs") previously granted and reported on Table I.

Includes 100,549 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents voluntary agreement to forfeit and cancel all outstanding performance stock units ("PSUs") previously granted and reported on Table II.

Represents voluntary agreement to forfeit and cancel all outstanding performance stock units ("PSUs") previously granted and reported on Table II.

Represents voluntary agreement to forfeit and cancel all outstanding performance stock units ("PSUs") previously granted and reported on Table II.

Represents voluntary agreement to forfeit and cancel unvested restricted stock units ("RSUs") previously granted and reported on Table I.

Includes 30,543 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents the number of shares withheld and returned to the plan to cover the tax liability of the January 2, 2026 vesting of a previously reported restricted share grant represented in Table I.

Includes 30,556 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents the number of shares withheld and returned to the plan to cover the tax liability of the January 2, 2026 vesting of a previously reported restricted share grant represented in Table I.

Includes 102,649 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents the number of shares withheld and returned to the plan to cover the tax liability of the December 18, 2025 stock awarded.

Includes 109,377 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents 14,749 of common stock issued to the reporting person on a fully vested basis.

Represents the number of shares withheld and returned to the plan to cover the tax liability of the November 20, 2025 vesting of a previously reported restricted share grant represented in Table I.

Includes 37,703 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents 33,320 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable. The RSUs will vest and be settled in six equal semi-annual installments over a three year period, subject to the Reporting Person's continuation of service with the Company. These RSUs have been granted under the Company's 2025 Long Term Incentive Program as non-cash stock awards. Each RSU shall entitle its holder to receive one Common Stock of the issuer.

Includes 109,377 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents 10,132 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable. The RSUs will vest and be settled in six equal semi-annual installments over a three year period, subject to the Reporting Person's continuation of service with the Company. These RSUs have been granted under the Company's 2025 Long Term Incentive Program as non-cash stock awards. Each RSU shall entitle its holder to receive one Common Stock of the issuer.

Includes 32,607 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents 12,224 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable. The RSUs will vest and be settled in six equal semi-annual installments over a three year period, subject to the Reporting Person's continuation of service with the Company. These RSUs have been granted under the Company's 2025 Long Term Incentive Program as non-cash stock awards. Each RSU shall entitle its holder to receive one Common Stock of the issuer.

Includes 39,403 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents the number of shares withheld and returned to the plan to cover the tax liability of the September 19, 2025 stock awarded.

Includes 76,057 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents 11,250 of common stock issued to the reporting person on a fully vested basis.

Represents the number of shares withheld and returned to the plan to cover the tax liability of the August 19, 2025 vesting of a previously reported restricted share grant represented in Table I.

Includes 22,475 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents the number of shares withheld and returned to the plan to cover the tax liability of the August 19, 2025 vesting of a previously reported restricted share grant represented in Table I.

Includes 76,057 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Includes 27,179 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents 14,238 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable. The RSUs will vest and be settled in six equal semi-annual installments over a three year period, subject to the Reporting Person's continuation of service with the Company. These RSUs have been granted under the Company's 2025 Long Term Incentive Program as non-cash stock awards. Each RSU shall entitle its holder to receive one Common Stock of the issuer.

Represents 46,824 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable. The RSUs will vest and be settled in six equal semi-annual installments over a three year period, subject to the Reporting Person's continuation of service with the Company. These RSUs have been granted under the Company's 2025 Long Term Incentive Program as non-cash stock awards. Each RSU shall entitle its holder to receive one Common Stock of the issuer.

Represents the number of shares withheld and returned to the plan to cover the tax liability of the July 1, 2025 vesting of a previously reported restricted share grant represented in Table I.

Includes 374,750 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents the number of shares withheld and returned to the plan to cover the tax liability of the July 1, 2025 vesting of a previously reported restricted share grant represented in Table I.

Includes 117,488 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents 54,347 shares underlying restricted stock units ("RSUs"). The RSUs will vest and be settled in four equal quarterly installments on 8/6/2025, 11/6/2025, 2/6/2026, and 5/6/2026. Each RSU shall entitle its holder to receive one Common Stock of the issuer.

Includes 54,347 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents 43,478 shares underlying restricted stock units ("RSUs"). The RSUs will vest and be settled in four equal quarterly installments on 8/6/2025, 11/6/2025, 2/6/2026, and 5/6/2026. Each RSU shall entitle its holder to receive one Common Stock of the issuer.

Includes 43,478 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents 65,217 shares underlying restricted stock units ("RSUs"). The RSUs will vest and be settled in four equal quarterly installments on 8/6/2025, 11/6/2025, 2/6/2026, and 5/6/2026. Each RSU shall entitle its holder to receive one Common Stock of the issuer.

Includes 65,217 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents 54,347 shares underlying restricted stock units ("RSUs"). The RSUs will vest and be settled in four equal quarterly installments on 8/6/2025, 11/6/2025, 2/6/2026, and 5/6/2026. Each RSU shall entitle its holder to receive one Common Stock of the issuer.

Includes 54,347 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents 27,208 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable. The RSUs will vest and be settled six months after the grant date, subject to the Reporting Person's continuation of service with the Company. Each RSU shall entitle its holder to receive one Common Stock of the issuer.

Includes 184,901 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Represents 37,103 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable. The RSUs will vest and be settled six months after the grant date, subject to the Reporting Person's continuation of service with the Company. Each RSU shall entitle its holder to receive one Common Stock of the issuer.

Includes 396,710 shares underlying RSUs that are not yet vested and deliverable.

Represents 21,802 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable. The RSUs will vest and be settled six months after the grant date, subject to the Reporting Person's continuation of service with the Company. Each RSU shall entitle its holder to receive one Common Stock of the issuer.

Includes 124,671 shares underlying RSUs that are not yet vested and deliverable.