8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of

the Securities Exchange Act of 1934

Date of report (Date of earliest event reported): July 22, 2025

AQUA METALS, INC.

(Exact Name of Registrant as Specified in Its Charter)

Securities registered pursuant to Section 12(b)of the Act:

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions.

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14d-2(b)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.07.         Submission of Matters To a Vote of Security Holders

We held an annual meeting of stockholders on July 22, 2025, for purposes of:

All of the persons nominated to serve on our board of directors, namely Vincent DiVito, Stephen Cotton, Steve Henderson, and Eric Gangloff were elected to our board of directors, with shares voted as follows:

There were 2,684,708 broker non-votes in the election of directors.

Our shareholders approved for purposes of complying with Nasdaq Listing Rule 5635(d), the potential issuance and sale of up to $10,000,000 of our common stock, pursuant to our purchase agreement with Lincoln Park Capital Fund, LLC, with shares voted as follows:

There were 2,684,708 broker non-votes in the approval of the purchase agreement with Lincoln Park Capital Fund, LLC.

Our shareholders approved an amendment to our First Amended and Restated Certificate of Incorporation to effect a reverse split of our issued and outstanding shares of common stock, at a specific ratio, ranging from one-for-two (1:2) to one-for-ten (1:10), with the exact ratio within such range to be determined by the Board of Directors of the Company, with shares voted as follows:

There were no broker non-votes in the approval of an amendment to the Company’s Amended and Restated Certificate of Incorporation.

Our shareholders approved an amendment to our 2019 Stock Incentive Plan to increase the number of shares of common stock reserved under the plan, with shares voted as follows:

There were 2,684,708 broker non-votes in the approval of an amendment to our 2019 Stock Incentive Plan to increase the number of shares of common stock reserved under the plan.

Our shareholders approved the appointment of Forvis Mazars, LLP as the Company’s independent registered public accounting firm for the year ending December 31, 2025, with shares voted as follows:

There were no broker non-votes in the approval of the appointment of Forvis Mazars, LLP.

Our shareholders approved, on an advisory basis, the compensation of the Company’s named executive officers, as disclosed in our 2025 Proxy Statement, with shares voted as follows:

There were 2,684,708 broker non-votes in the approval, on an advisory basis, the compensation of the Company’s named executive officers.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.