Stephen Cotton - 13 Oct 2026 Form 4 Insider Report for Aqua Metals, Inc. (AQMS)

Reporting relationship: Chief Executive Officer, Director
Issuer ticker: AQMS
Reported as of: 13 Oct 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 15 Oct 2026, 16:26:51 UTC
Prior SEC filing: 26 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/ Eric West, by power of attorney

Filing notes and source

Key filing fact

Stephen Cotton filed Form 4 for Aqua Metals, Inc. (AQMS) on 15 Oct 2026.

Key facts

This page summarizes Stephen Cotton's Form 4 filing for Aqua Metals, Inc. (AQMS).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 15 Oct 2026, 16:26.

Change

Previous filing in this sequence was filed on 26 Aug 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001649322 Primary reporting owner

Cotton Stephen

Relationship: Chief Executive Officer, Director
Address: 5370 KIETZKE LN, SUITE 201, RENO
Signature: /s/ Eric West, by power of attorney
Signature date: 15 Oct 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

AQMS transaction

Common Stock

Award

Transaction value
Shares: +35,310
Change %: +11%
Price: $0.000000^*
Shares after: 354,094
Date: 13 Oct 2026
Ownership: Direct
Footnotes: F1

AQMS transaction

Common Stock

Tax liability

Transaction value
Shares: -2,352
Change %: -0.66%
Price: $1.92^*
Shares after: 351,742
Date: 13 Oct 2026
Ownership: Direct
Footnotes: F2, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Represents 35,310 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 2026 Long Term Incentive Program as non-cash stock awards. Each RSU shall entitle its holder to receive one share of Common Stock of the issuer.

Footnote F2

Represents the withholding of 2,352 shares of common stock to satisfy tax withholding obligations in connection with the October 13, 2026 vesting of 5,553 previously reported restricted stock units.

Footnote F3

Includes 208,293 shares underlying restricted stock units ("RSUs") that are not yet vested and deliverable.