Aqua Metals officer has 1,005 shares withheld for tax

Aqua Metals, Inc. (AQMS) reported an insider tax-withholding transaction by officer Benjamin S. Taecker, Chief Eng and Opr Officer.

Rhea-AI Filing Summary

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.

Insider Trade Summary

Tax Withholding: 1,005 shares

Tax Withholding 1 txn

Insider Taecker Benjamin S.

Role Chief Eng and Opr Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1, F2	1,005	$2.67	$3K

Holdings After Transaction: Common Stock — 56,316 shares (Direct)

Footnotes (2)

1. F1. Represents the number of shares withheld and returned to the plan to cover the tax liability of the August 19, 2026 vesting of a previously reported restricted share grant represented in Table I.
2. F2. Includes 22,354 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

Key Figures

Shares withheld for tax liability: 1,005 shares Transaction price per share: $2.67 per share Shares held after transaction: 56,316 shares +1 more

4 metrics

Shares withheld for tax liability 1,005 shares Shares withheld and returned to the plan on August 19, 2026

Transaction price per share $2.67 per share Value used for the 1,005 shares withheld for tax liability

Shares held after transaction 56,316 shares Direct Aqua Metals common stock holdings of Benjamin S. Taecker after the transaction

Unvested RSUs included in holdings 22,354 shares underlying RSUs Unvested and not yet deliverable restricted stock units included in post-transaction holdings

Key Terms

restricted stock units ("RSUs"), withheld and returned to the plan, tax liability

3 terms

restricted stock units ("RSUs") financial

"Includes 22,354 shares underlying restricted stock units ("RSUs") that are not yet"

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

withheld and returned to the plan financial

"Represents the number of shares withheld and returned to the plan to cover"

tax liability financial

"returned to the plan to cover the tax liability of the August 19, 2026"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Aqua Metals (AQMS) report for Benjamin S. Taecker?

Aqua Metals reported that 1,005 shares of common stock for Benjamin S. Taecker were withheld and returned to the plan on August 19, 2026 to cover tax liability related to a vesting restricted share grant.

Was the Aqua Metals (AQMS) Form 4 transaction a market sale or a tax withholding?

The Form 4 describes a tax-withholding disposition. Shares were withheld and returned to the plan to pay the tax liability on the August 19, 2026 vesting of a restricted share grant, not sold in the open market.

How many Aqua Metals (AQMS) shares does Benjamin S. Taecker hold after this transaction?

Following the August 19, 2026 transaction, Benjamin S. Taecker directly holds 56,316 shares of Aqua Metals common stock, which includes 22,354 shares underlying RSUs that are not yet vested and deliverable.

What was the price per share used for the Aqua Metals (AQMS) tax-withholding transaction?

The tax-withholding disposition for Benjamin S. Taecker used a price of $2.67 per share for the 1,005 shares that were withheld and returned to the plan to cover tax liability tied to the restricted share vesting.

What type of equity award is referenced in the Aqua Metals (AQMS) Form 4 footnotes?

The Form 4 footnotes reference a vesting of a previously reported restricted share grant and also note that Taecker’s holdings include 22,354 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 08/21/2026 - 04:02 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Taecker Benjamin S.

(Last) (First) (Middle)

5370 KIETZKE LN

SUITE 201

(Street)

RENO NEVADA 89511

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Aqua Metals, Inc. [ AQMS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Eng and Opr Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/19/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/19/2026		F(1)		1,005	D	$2.67	56,316(2)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

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

2. Includes 22,354 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.

	/s/ Eric West, by power of attorney	08/21/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)