6-K

UNITEDSTATES

SECURITIESAND EXCHANGE COMMISSION

Washington,D.C. 20549

FORM6-K

Reportof Foreign Private Issuer

Pursuantto Rule 13****a-16or 15d-16

UNDERthe Securities Exchange Act of 1934

For the month of January 2026

Commission File No.: 001-43051

SantacruzSilver Mining Ltd.

(Translation of registrant’s name into English)

480– 1140 West Pender Street

Vancouver,British Columbia

CanadaV6E 4G1

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F: Form 20-F ☐ Form 40-F ☒

EXHIBITINDEX

SIGNATURE

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, thereunto duly authorized.

Exhibit 99.1

SantacruzSilver to Commence Trading on NASDAQ at Market Open Today

Vancouver,B.C. – Santacruz Silver Mining Ltd. (NASDAQ:SCZM) (TSX.V:SCZ) (FSE:1SZ) (“Santacruz” or the “Company”) is pleased to announce that its common shares will commence trading today on the Nasdaq Capital Market (the “Nasdaq”) at market open, January 21, 2026, under the symbol “SCZM”. The Company’s common shares will continue to trade on the TSX Venture Exchange under the symbol “SCZ” and the Frankfurt Stock Exchange under the symbol “1SZ”.

Arturo Préstamo, Executive Chairman and Chief Executive Officer of Santacruz, commented, “Today marks Santacruz’s first day of trading on the Nasdaq, a significant milestone on our growth journey. Securing this listing reflects the successful execution of the Company’s capital markets strategy and our progress in de-risking the business. Entering the Nasdaq positions Santacruz to increase liquidity, attract a more diverse institutional investor base, and enhance visibility in key global markets. Most importantly, it demonstrates our ongoing commitment to creating long-term value for our shareholders as we continue to advance our operational and growth objectives in 2026.”

Upon commencement of trading on the Nasdaq, Santacruz’s common shares will cease to be quoted on the OTCQX® Best Market. Shareholders are not required to take any action; however, shareholders who purchased shares on OTCQX are encouraged to monitor their brokerage accounts to ensure holdings are correctly reflected in respect of the Nasdaq listing.

The Company will participate today, January 21, 2026, in the Nasdaq Opening Bell Ceremony (the “Ceremony”) at 9:15 a.m. Eastern Time. Executive Chairman and Chief Executive Officer, Arturo Préstamo, will lead the Ceremony alongside other members of the Company’s Board of Directors and management team. The Ceremony will be broadcasted live from the Nasdaq MarketSite Tower in New York, NY. To view the live broadcast, please visit: https://www.nasdaq.com/marketsite/bell-ringing-ceremony.

AboutSantacruz Silver Mining Ltd.

Santacruz Silver is engaged in the operation, acquisition, exploration, and development of mineral properties across Latin America. In Bolivia, the Company operates the Bolivar, Porco, and Caballo Blanco mining complexes, with Caballo Blanco comprising the Tres Amigos and Colquechaquita mines. The Reserva mine, whose production is provided to the San Lucas ore sourcing and trading business, is also located in Bolivia. Additionally, the Company oversees the Soracaya exploration project. In Mexico, Santacruz operates the Zimapán mine.

For further information please contact:

Arturo Préstamo

Santacruz Silver Mining Ltd.

Email: [email protected]

Telephone: +52 81 83 785707

Andrés Bedregal

Santacruz Silver Mining Ltd.

Email: [email protected]

Telephone: +591 22444849

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Neitherthe TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) northe Nasdaq Capital Market LLC accepts responsibility for the adequacy or accuracy of this news release. No stock exchange, securitiescommission or other regulatory authority has approved or disapproved the information contained herein.

ForwardLooking Information

Thisnews release includes certain statements and information that may constitute forward-looking information within the meaning of applicableCanadian securities laws. Forward-looking statements relate to future events or future performance and reflect the expectations or beliefsof the management of the Company regarding future events. Generally, forward-looking statements and information can be identified bythe use of forward-looking terminology such as “intends”, “expects” or “anticipates”, or variationsof such words and phrases or statements that certain actions, events or results “may”, “could”, “should”,“would” or will “potentially” or “likely” occur. This information and these statements, referredto herein as “forward-looking statements”, are not historical facts, are made as of the date of this news release and includewithout limitation, statements regarding the listing of the Company’s common shares on Nasdaq, including the timing and the anticipatedbenefits thereof.

Theseforward-looking statements involve numerous risks and uncertainties and actual results might differ materially from results suggestedin any forward-looking statements. These risks and uncertainties include, among other things: that the Company’s common sharesmay not commence trading on the Nasdaq on the expected timing; that the Company may not receive the anticipated benefits of the Nasdaqlisting; changes in equity markets; inflation; and those risks set out in the Company’s public disclosure record on SEDAR+ (www.sedarplus.ca).

Therecan be no assurance that any forward-looking information will prove to be accurate, as actual results and future events could differmaterially from those anticipated in such statements. Accordingly, the reader should not place any undue reliance on forward-lookinginformation or statements. The Company undertakes no obligation to update forward-looking information or statements, other than as requiredby applicable law.

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