Form 8-K

8-K — Golden Minerals Co

Accession: 0001104659-26-106690

Filed: 2026-09-10

Period: 2026-09-04

CIK: 0001011509

SIC: 1040 (GOLD & SILVER ORES)

Item: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Item: Regulation FD Disclosure

Item: Financial Statements and Exhibits

Documents

8-K — tm2625163d1_8k.htm (Primary)

EX-99.1 — EXHIBIT 99.1 (tm2625163d1_ex99-1.htm)

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON,

D.C. 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): September

4, 2026

GOLDEN MINERALS COMPANY

(Exact name of registrant as specified in its

charter)

delaware

1-13627

26-4413382

(State or other jurisdiction of

incorporation or organization)

(Commission File Number)

(I.R.S.

Employer Identification

Number)

1312

17th Street, Unit

2136

Golden,

Colorado 80202

(Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including

area code: (303) 839-5060

Check the appropriate box below if the Form 8-K filing is intended

to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2.

below):

¨ 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 240.14a-12)

¨ 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))

Securities registered pursuant to

Section 12(b) of the Act: None

Indicate by check mark whether the registrant is an emerging growth

company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405 of this chapter) or Rule 12b-2 of the Securities

Exchange Act of 1934 (17 CFR §240.12b-2 of this chapter).

Emerging growth company ¨

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 5.02             Departure of Directors or Certain

Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

Departure of President and Chief Executive

Officer

On September 4, 2026, Pablo

Castanos notified Golden Minerals Company (the “Company”) of his resignation as President and Chief Executive Officer of the

Company, effective September 30, 2026. Mr. Castanos will continue to serve as a member of the Board of Directors of the Company (the “Board”).

Mr. Castanos’s resignation is not the result of any disagreement with the Company on any matter relating to the Company’s

operations, policies or practices.

Appointment of President and Chief Executive

Officer

On September 10, 2026, the

Board appointed David H. Watkins, a current member of the Board, as President and Chief Executive Officer of the Company, effective September

30, 2026. Mr. Watkins will continue to serve as a member of the Board.

Mr. Watkins, 81, has served

as a director of the Company since March 2009. Mr. Watkins is an exploration geologist with over 50 years of experience in the mining

industry as a senior executive with major mining companies and with junior exploration and development companies. From 2011 to 2016, Mr.

Watkins served as Chairman of Atna Resources Ltd. (“ATNA”), a company engaged in the exploration, development and production

of gold properties. Mr. Watkins previously served ATNA as Executive Chairman from June 2010 to June 2011 and Chief Executive Officer from

March 2000 to June 2010. From 1993 to 1999, Mr. Watkins served as Senior Vice President, Exploration of Cyprus Amax Minerals Company,

a producer of commodities including copper, gold, molybdenum, lithium and coal. Prior to his employment with Cyprus Amax, Mr. Watkins

served as President of Minova Inc., a producer of precious metals and base metals from mining operations in Canada. Since March 2020,

Mr. Watkins has served on the board of directors of Enduro Metals Corporation. Mr. Watkins previously served on the board of directors

of Argonaut Gold Inc. (2012–2016), Bearing Lithium Corporation (2012–2014), Camino Minerals Corporation (2010–2015),

Canplatts Inc. (2008–2010), Commander Resources Ltd. (2009–2025), Euro Resources S.A. (2006–2024), Landdrill International

Inc. (1999–2012), Maudore Minerals Ltd. (2004–2010), Rio Novo Gold Inc. (2011–2015), Valley High Ventures (2009 - 2011).

Mr. Watkins holds a B.A. in Geology from Queen’s University at Kingston and an M.S. in Geology from Carleton University, Ottawa,

and is a graduate of the Executive Business Program of the University of Western Ontario. Mr. Watkins is a member of the Canadian Institute

of Mining and Metallurgy, Geological Association of Canada, Geological Society of Nevada and Prospectors and Developers Association of

Canada.

The Company has not entered

into an employment agreement with Mr. Watkins or determined his compensation in connection with his appointment. The Company will file

an amendment to this Current Report on Form 8-K disclosing any material compensation arrangements made in connection with this appointment

when determined.

There is no arrangement or

understanding between Mr. Watkins and any other person pursuant to which he was appointed as President and Chief Executive Officer of

the Company. Mr. Watkins does not have any family relationship with any of the Company’s other directors or executive officers or

persons nominated or chosen by the Company to become a director or executive officer. Mr. Watkins has no direct or indirect material interest

in any transaction or proposed transaction required to be reported under Item 404(a) of Regulation S-K.

Item 7.01              Regulation FD

Disclosure

On September 4, 2026, the

Company issued a press release announcing the foregoing management changes and providing an update on its Argentine projects. A copy of

this press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The information contained

in Item 7.01 of this Form 8-K, including Exhibit 99.1, is being furnished and shall not be deemed “filed” for purposes of

Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities

of that section, nor shall it be deemed incorporated by reference in any filing by the company under the Securities Act of 1933, as amended,

or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Item 9.01              Financial

Statements and Exhibits.

(d)          Exhibits.

Exhibit No.

Description

99.1

Press Release, dated September 4, 2026.

104

Cover Page Interactive Data File (embedded within the Inline XBRL document).

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.

Date: September 10, 2026

Golden Minerals Company

By:

/s/ Pablo Castanos

Name:

Pablo Castanos

Title:

President and Chief Executive Officer

EX-99.1 — EXHIBIT 99.1

EX-99.1

Filename: tm2625163d1_ex99-1.htm · Sequence: 2

Exhibit 99.1

Golden Minerals Announces Management Change

and Argentine Project Update

Denver, CO - / ACCESS NEWS WIRE/ - September

4, 2026 / Golden Minerals Company ("Golden Minerals," "Golden" or the "Company") (OTCQB: AUMN and TSX:

AUMN) announces that Pablo Castanos has notified the Company of his resignation from the offices of President and CEO, effective September

30, 2026 to pursue another opportunity. Mr. Castanos will continue to serve as a director of the Company. The Company’s Board of

Directors (the “Board”) thanks Mr. Castanos for his service and efforts over the past three years. The Board has appointed

David Watkins, a director of the Company since 2009, as President and CEO of the Company, effective September 30, 2026, and Mr. Watkins

will continue to serve as a director of the Company. Mr. Watkins is an exploration geologist and seasoned mining executive with a track

record of the discovery and development of multiple base and precious metals mines around the world.

Additionally, the Company notes that its partner

in the Sarita Este and Desierto projects in Argentina, Cascadero Copper Corporation, stated in its September 1, 2026 news release that

it had agreed to sell its interests in these and other properties in Argentina to Lumina Copper Corporation, a wholly-owned affiliate

of First Quantum Minerals, Ltd. (“First Quantum”). If the sale is completed, Golden looks forward to working with First Quantum.

Golden is planning a first-stage drill program to test potentially deep mineralization similar to mineralization at First Quantum’s

Taca Taca project immediately north of Golden’s targets at the Desierto concessions. The Company expects to announce the details

of its drilling program later in September.

Forward-Looking Statements

This press release contains forward-looking statements

within the meaning of the Securities Act of 1933, as amended, and the Securities Exchange Act of 1934, as amended, and forward-looking

information with the meaning of applicable Canadian securities legislation (collectively, "forward-looking statements"), including

statements regarding changes in executive management and the timing thereof; the Company’s planned first-stage drill program and

anticipated exploration at the Desierto project in Argentina and the expected timing of the announcement of the details of, and any results

from, that program; and the proposed sale by Cascadero Copper Corporation of its interests in the Sarita Este and Desierto projects to

Lumina Copper Corporation, an affiliate of First Quantum Minerals, Ltd., and the completion and timing thereof. These statements are

subject to risks and uncertainties, including increases in costs and declines in general economic conditions; changes in political conditions,

in tax, royalty, environmental and other laws in the United States, Mexico, Argentina and other jurisdictions in which the Company operates

or may operate; risks associated with joint ventures and international operations; and fluctuations in silver and gold prices. Golden

Minerals assumes no obligation to update this information. Additional risks relating to Golden Minerals may be found in the periodic

and current reports filed with the SEC by Golden Minerals and under the Company's profile on SEDAR+ at www.sedarplus.ca, including the

Company's Annual Report on Form 10-K for the year ended December 31, 2025.

For additional information, please visit http://www.goldenminerals.com/

or contact:

Golden Minerals Company

(303) 839-5060

SOURCE: Golden Minerals Company

1312 17TH STREET, UNIT 2136, GOLDEN, COLORADO 80202 - MAIN (303) 839-5060

www.GoldenMinerals.com

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