Every Form 4 that Aqua Metals, Inc. (AQMS) has filed with the SEC in the last 12 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A Form 4 covers the transactions officers, directors and large holders report, so if you follow AQMS and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full AQMS filings page.
Aqua Metals, Inc. (symbol: AQMS) is the issuer of record for a Form 4 filing submitted to the SEC.
Aqua Metals, Inc. (AQMS) reported that director Vincent L. DiVito received an equity award of 15,641 shares of Common Stock on August 24, 2026, in the form of restricted stock units (RSUs) at $0.00 per share. Footnotes state the first installment vested immediately on that date, with remaining RSUs vesting in three installments on 11/1/2026, 2/1/2027, and 5/1/2027, each RSU converting into one share of Common Stock. Following this award, DiVito directly holds 26,402 shares, including 11,731 unvested RSUs that are not yet deliverable.
Aqua Metals, Inc. (AQMS) reported that director Eric John Gangloff acquired 10,427 shares of Common Stock on August 24, 2026 through a restricted stock unit (RSU) grant, recorded at $0.0000 per share. Each RSU entitles the holder to receive one share of Common Stock.
The first installment of this RSU award vested immediately on August 24, 2026, with the remaining RSUs scheduled to vest in three installments on November 1, 2026, February 1, 2027, and May 1, 2027. Following this grant, Gangloff’s direct holdings total 22,347 shares, which include 7,820 shares underlying RSUs that are not yet vested and deliverable.
Aqua Metals, Inc. (symbol: AQMS) is the issuer of record for a Form 4 filing submitted to the SEC.
Aqua Metals, Inc. (symbol: AQMS) is the issuer of record for a Form 4 filing submitted to the SEC.
Aqua Metals, Inc. (AQMS) reported that officer Benjamin S. Taecker, Chief Engineering and Operating Officer, received an equity compensation grant of 30,958 restricted stock units (RSUs) on 2026-08-24. These RSUs, granted as non-cash stock awards under the 2026 Long Term Incentive Program, will vest in six equal semi-annual installments over three years, subject to his continued service. Each RSU converts into one share of common stock upon vesting. Following this grant, Taecker’s reported direct holdings total 87,274 shares, including 53,312 unvested RSUs.
Aqua Metals, Inc. (AQMS) reported an insider tax-withholding transaction by officer Benjamin S. Taecker, Chief Eng and Opr Officer. On August 19, 2026, 1,005 shares of common stock were withheld and returned to the plan at $2.67 per share to cover taxes on the vesting of a previously granted restricted share award. After this transaction, Taecker directly holds 56,316 shares of common stock, including 22,354 shares underlying unvested RSUs.
Aqua Metals, Inc. (AQMS) reported that Chief Financial Officer Eric West had 1,213 shares of common stock withheld on August 19, 2026 at $2.67 per share to cover tax liability from the vesting of a previously reported restricted stock grant. Following this tax-withholding disposition, West directly holds 63,124 shares of common stock, which includes 28,239 shares underlying unvested restricted stock units.
Aqua Metals, Inc. (AQMS) reported a Form 4 transaction by Chief Executive Officer and director Stephen Cotton. On August 19, 2026, 3,305 shares of common stock were withheld and returned to the company’s equity plan at $2.67 per share to cover tax liabilities from the vesting of a previously granted restricted share award. Following this withholding transaction, Cotton directly holds 213,966 common shares, which includes 73,718 shares underlying unvested RSUs that are not yet deliverable.
Aqua Metals, Inc. reported a routine insider share withholding by Chief Eng and Opr Officer Benjamin S. Taecker. On July 1, 2026, 744 shares of common stock were withheld and returned to the company’s equity plan to cover tax obligations arising from the vesting of a previously reported restricted share grant. This was recorded as a tax-withholding disposition, not an open-market sale, at a price of $2.97 per share. After this transaction, Taecker directly held 57,321 common shares, including 24,727 shares underlying restricted stock units that are not yet vested and deliverable.
Aqua Metals, Inc. Chief Executive Officer Stephen Cotton reported a routine tax-related share disposition. On the vesting of a previously granted restricted share award on July 1, 2026, 2,402 shares of common stock were withheld and returned to the company plan to cover the related tax liability.
After this withholding, Cotton holds 217,271 shares of Aqua Metals common stock directly, which the disclosure states includes 81,522 shares underlying unvested restricted stock units that are not yet deliverable. The transaction did not involve an open-market purchase or sale of shares.
Aqua Metals, Inc. Chief Financial Officer Eric West reported a routine tax-withholding transaction related to a vesting of restricted stock. On the vesting date, 721 common shares were withheld and returned to the equity plan at a price of $3.91 per share to cover tax liabilities. Following this withholding, West directly holds 64,337 common shares, which includes 31,102 shares underlying restricted stock units that are not yet vested and deliverable.
Aqua Metals, Inc. Chief Financial Officer Eric West reported a routine tax-withholding disposition related to a vesting equity award. On the April 13, 2026 vesting of a previously granted restricted share award, 863 shares of common stock were withheld and returned to the company’s plan to cover associated tax liabilities at a value of $3.92 per share. Following this non‑market transaction, West directly holds 65,058 shares of common stock, including 32,803 shares underlying restricted stock units that are not yet vested and deliverable.
Aqua Metals, Inc. Chief Eng and Opr Officer Benjamin S. Taecker reported a tax-withholding disposition of 715 shares of common stock at $3.92 per share. These shares were withheld and returned to the company plan to cover taxes on an April 13, 2026 vesting of a previously granted restricted share award, rather than sold on the open market. Following this transaction, he directly holds 58,065 shares of common stock, which include 26,482 shares underlying restricted stock units that are not yet vested and deliverable.
Aqua Metals, Inc. reported that Chief Executive Officer Stephen Cotton had shares withheld to cover taxes tied to an equity award. On April 13, 2026, 2,352 shares of common stock were withheld and returned to the company plan to satisfy tax liability from a vesting restricted share grant.
After this tax-withholding disposition, Cotton directly holds 219,673 shares of common stock, which includes 87,192 shares underlying unvested restricted stock units that are not yet deliverable. The event reflects routine administration of equity compensation rather than an open-market trade.
Aqua Metals, Inc. Chief Executive Officer Stephen Cotton reported a tax-related share withholding tied to a vesting of restricted stock. On the Form 4, 3,307 shares of common stock were disposed of at $4.76 per share to cover withholding taxes, as indicated by transaction code "F" for a tax-liability payment.
After this transaction, Cotton directly owned 222,025 shares of Aqua Metals common stock, which the filing notes includes 92,745 shares underlying unvested restricted stock units that are not yet deliverable.
Aqua Metals, Inc. reported that Chief Engineering and Operating Officer Benjamin S. Taecker had 1,006 shares of common stock withheld on February 24, 2026 to cover taxes from the vesting of a previously granted restricted share award at $4.76 per share. After this tax-withholding disposition, he directly owns 58,780 shares, including 28,170 unvested RSUs that are not yet deliverable.
Aqua Metals, Inc. Chief Financial Officer Eric West reported a Form 4 transaction involving common stock. On the vesting of a previously granted restricted share award on February 24, 2026, 1,214 shares were withheld and returned to the plan to cover associated tax liabilities at a price of $4.76 per share.
After this tax-withholding disposition, West beneficially owns 65,921 common shares, which include 34,840 shares underlying restricted stock units that are not yet vested and deliverable. The transaction reflects administrative tax settlement rather than an open‑market sale.
West Eric reported acquisition or exercise transactions in a Form 4 filing for AQMS. The filing lists transactions totaling 28,390 shares at a weighted average price of $4.72 per share. Following the reported transactions, holdings were 67,135 shares.
Cotton Stephen reported acquisition or exercise transactions in a Form 4 filing for AQMS. The filing lists transactions totaling 79,873 shares at a weighted average price of $4.72 per share. Following the reported transactions, holdings were 225,332 shares.
Taecker Benjamin S. reported acquisition or exercise transactions in a Form 4 filing for AQMS. The filing lists transactions totaling 23,306 shares at a weighted average price of $4.72 per share. Following the reported transactions, holdings were 59,786 shares.
Aqua Metals, Inc. filed a Form 4 for Chief Engineering and Operating Officer Benjamin S. Taecker reporting voluntary cancellations of equity awards. On January 7, 2026, he agreed to forfeit and cancel unvested restricted stock units (RSUs) previously granted, which is shown as a disposition of 13 shares of common stock at a price of $0. Following this adjustment, he beneficially owned 36,480 shares of common stock, including 30,543 shares underlying RSUs that are not yet vested and deliverable.
The filing also reports that he voluntarily agreed to forfeit and cancel all outstanding performance share units (PSUs). These included several PSU awards covering 443 shares each and one award covering 1,329 shares of common stock, all recorded as derivative securities with a $0 exercise price and reduced to zero units held after the transactions. These changes represent internal modifications to his equity compensation rather than open-market share sales.
Aqua Metals, Inc. Chief Executive Officer and director Stephen Cotton reported voluntary cancellations of unvested equity awards. On 01/07/2026, he forfeited 2,100 shares of common stock at $0, reflecting the cancellation of unvested restricted stock units. After this adjustment, he directly beneficially owned 145,459 shares of common stock, which includes 100,549 shares underlying restricted stock units that are not yet vested and deliverable. Cotton also voluntarily forfeited and cancelled multiple performance share unit awards, including blocks of 1,510 units tied to dates in 2025 and 2026 and 4,530 units tied to 2027, leaving him with 0 performance share units outstanding.
Aqua Metals, Inc. (AQMS) reported a routine insider equity transaction by Chief Executive Officer and Director Stephen Cotton. On January 2, 2026, 3,208 shares of common stock were withheld and returned to the company’s equity plan to cover tax liabilities arising from the vesting of a previously reported restricted share grant, rather than being sold on the open market.
Following this tax withholding, Cotton beneficially owned 147,559 shares of Aqua Metals common stock, including 102,649 shares underlying restricted stock units (RSUs) that have not yet vested or become deliverable. The filing is a compliance disclosure showing how vested equity awards are used to satisfy personal tax obligations while retaining a substantial equity position.
Aqua Metals, Inc. officer Benjamin S. Taecker reported a tax-related withholding of 979 shares of Aqua Metals common stock on January 2, 2026. The shares were withheld at $4.8 per share to cover tax liability tied to the vesting of a previously reported restricted share grant. After this withholding, Taecker beneficially owned 36,493 shares of common stock. This total includes 30,556 shares underlying restricted stock units that are not yet vested and deliverable, so they may be received in the future as vesting conditions are met.
Aqua Metals, Inc. (AQMS) Chief Financial Officer Eric West reported an insider transaction on a Form 4. On 11/20/2025, 720 shares of common stock were withheld and returned to the company’s equity plan to cover taxes owed on the vesting of a previously reported restricted share grant. After this tax-withholding transaction, West beneficially owned 38,745 shares of Aqua Metals common stock, including 37,703 shares underlying restricted stock units that have not yet vested or been delivered.
Aqua Metals (AQMS) filed a Form 4 reporting that its Chief Financial Officer acquired 12,224 shares of common stock underlying restricted stock units on 10/13/2025. The filing lists a price of $9.58 for the transaction.
The RSUs were granted as non-cash stock awards under the company’s 2025 Long Term Incentive Program and will vest in six equal semi-annual installments over three years, contingent on continued service. Following the award, the reporting person beneficially owned 39,465 shares. The filing notes this includes 39,403 unvested RSUs. Each RSU represents the right to receive one share of common stock upon vesting.
Aqua Metals (AQMS) reported an insider equity award on a Form 4. The company’s Chief Engineering and Operating Officer acquired 10,132 shares of common stock through restricted stock units (RSUs) on 10/13/2025, recorded at $9.58 per share.
The RSUs vest in six equal semi-annual installments over three years, contingent on continued service, with each RSU delivering one share. Following the grant, the reporting person beneficially owned 37,472 shares directly, which includes 32,607 unvested RSUs. No sales were reported in this filing.
Aqua Metals (AQMS) reported an insider equity award. The company’s Chief Executive Officer and Director acquired 33,320 shares of common stock on 10/13/2025, reflecting restricted stock units (RSUs) granted under the 2025 Long Term Incentive Program. The form lists a price of $9.58.
The RSUs vest in six equal semi-annual installments over three years, contingent on continued service. Following the award, the reporting person beneficially owned 142,265 shares directly, which includes 109,377 unvested RSUs noted in the filing.