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Form 8-K

sec.gov

8-K — UNITED STATES ANTIMONY CORP

Accession: 0001104659-26-055951

Filed: 2026-05-06

Period: 2026-05-04

CIK: 0000101538

SIC: 3330 (PRIMARY SMELTING & REFINING OF NONFERROUS METALS)

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

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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)

May 4, 2026

UNITED

STATES ANTIMONY CORPORATION

(Exact

name of registrant as specified in its charter)

Texas

001-08675

81-0305822

(State or other jurisdiction

of incorporation)

(Commission

File No.)

(IRS Employer

Identification Number)

4438

W. Lovers Lane, Unit

100, Dallas,

TX

75209

(Address of principal executive officers)

(Zip Code)

Registrant’s telephone number, including

area code: (406) 606-4117

Not Applicable

(Former name or former address, if changed since

last report.)

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:

¨

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:

Title

of each class

Trading

Symbol(s)

Name

of each exchange on which registered

Common

Stock, $0.01 par value

UAMY

NYSE

Common

Stock, $0.01 par value

UAMY

NYSE

Texas

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).

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.

(b) Temporary Leave of Absence of Chief Financial

Officer

On May 4, 2026, United States Antimony Corporation

(the "Company") announced that Richard Isaak, the Company's Chief Financial Officer and principal financial officer, will commence

a personal leave of absence effective immediately. During the leave, Mr. Isaak will not perform the duties of Chief Financial Officer

or principal financial officer. Mr. Isaak is expected to return to his role following the conclusion of the leave, although the duration

of the leave has not been determined.

(c) Appointment of Interim Chief Financial Officer

In connection with Richard Isaak's leave of absence,

the Board of Directors of the Company appointed Shawn Winkler, age 50, to serve as Interim Chief Financial Officer and principal financial

officer of the Company, effective May 4, 2026.

Shawn Winkler brings more than two decades of corporate

finance, capital markets, and executive leadership experience to his role as Interim Chief Financial Officer. He most recently served

as Chief Financial Officer of Burrow Global, a Texas-based full-service engineering, procurement, and construction firm serving the energy

industry.

Prior to his CFO tenure, Mr. Winkler spent 15 years

as an investment banker at BMO Capital Markets and Deutsche Bank Securities, advising public and private clients in the natural resources

sector on more than $10 billion of M&A transactions. He led capital raises across the full capital structure including IPOs, follow-on

equity, high-yield and convertible notes, bank and institutional loans, and acquisition financing.

Mr. Winkler holds an MBA from Rice University's Jones

Graduate School of Management, where he was named a Jones Scholar, and a Bachelor of Arts in Economics, Managerial Studies, and Policy

Studies, also from Rice University. There are no arrangements or understandings between Mr. Winkler and any other persons pursuant to

which he was appointed as Interim Chief Financial Officer. There are no family relationships between Mr. Winkler and any director or executive

officer of the Company, and there are no transactions between Mr. Winkler and the Company that would be reportable under Item 404(a) of

Regulation S-K.

In connection with his appointment as Interim Chief

Financial Officer, Mr. Winkler will receive a monthly cash stipend of $20,000 during the period of his service in the interim role and

a one-time equity award of 100,000 stock purchase warrants with a strike price equal to the Company’s share price as of market close

on April 27, 2026.

Item 7.01 Regulation FD Disclosure

On May 6, 2026, the Company issued a press release

announcing Richard Isaak's leave of absence and the appointment of Shawn Winkler as Interim Chief Financial Officer.

A copy of the Press Release is attached as Exhibit

99.1 and is hereby incorporated by reference into this Item 7.01. The information contained in this Current Report on Form 8-K, including

Exhibit 99.1 furnished herewith, is being furnished and shall not be deemed “filed” for any purpose, including for the 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 and shall not be deemed incorporated by reference into any filing under the Exchange Act or the Securities Act of 1933,

as amended, regardless of any general incorporation language in such filing, except to the extent expressly stated in such filing.

Cautionary Note Regarding Forward-Looking Statements

This Current Report on Form 8-K, including the

Press Release, contains forward-looking statements, including statements regarding Mr. Isaak's expected return, the timing of the Company's

Q1 earnings release, and the Company's financial reporting process. Forward-looking statements reflect management's current knowledge,

assumptions, judgment, and expectations regarding future performance or events. Although management believes that the expectations reflected

in such statements are reasonable, they give no assurance that such expectations will prove to be correct, and you should be aware that

actual events or results may differ materially from those contained in the forward- looking statements. Words such as “will,”

“expect,” “intend,” “plan,” “potential,” “possible,” “goals,”

“accelerate,” “continue,” and similar expressions identify forward-looking statements.

Forward-looking statements are subject to a number

of risks and uncertainties including, but not limited to, those described in the Company’s filings on Form 10-K, Form 10-Q, and

Form 8-K with the United States Securities and Exchange Commission.

All forward-looking statements are expressly qualified

in their entirety by this cautionary notice. You should not rely upon any forward-looking statements as predictions of future events.

The Company undertakes no obligation to revise or update any forward-looking statements made in this Current Report on Form 8-K to reflect

events or circumstances after the date hereof, to reflect new information or the occurrence of unanticipated events, to update the reasons

why actual results could differ materially from those anticipated in the forward-looking statements, in each case, except as required

by law.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

Exhibit

No.

Description

99.1

Press Release issued by United States Antimony Corporation dated May 6, 2026

104

Cover Page Interactive Data File (embedded with 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.

UNITED STATES ANTIMONY CORPORATION

Dated:

May 6, 2026

By:

/s/ Gary C. Evans

Gary C. Evans

Chairman and Chief

Executive Officer

EX-99.1 — EXHIBIT 99.1

EX-99.1

Filename: tm2613688d1_ex99-1.htm · Sequence: 2

Exhibit 99.1

United

States Antimony Announces

Shawn

Winkler Appointed as Interim Chief Financial Officer

“The

Critical Minerals and ZEO Company”

~

Antimony, Cobalt, Tungsten, and Zeolite ~

DALLAS, TX / ACCESS Newswire / May

6, 2026 / United States Antimony Corporation

(“USAC,”

“US Antimony,” or the “Company”), (NYSE: UAMY) (NYSE Texas: UAMY), a leading producer and processor of antimony,

zeolite, and other critical minerals, and the only fully integrated antimony company in the world outside of China and Russia, today

announced that Richard Isaak, the Company’s Senior Vice President and Chief Financial Officer, has commenced a temporary personal

leave of absence effective May 4, 2026. The Board of Directors has appointed Shawn Winkler, the Company’s prior Financial Consultant,

to serve as Interim Chief Financial

Officer during Mr. Isaak’s absence,

effective May 4, 2026.

Mr. Isaak’s

leave is strictly personal related and has nothing to do with the Company’s financial performance, accounting practices, internal

controls, or any matter involving the Company’s financial reporting. Mr. Isaak is expected to return to his role following the

conclusion of the leave, currently anticipated for a minimum of two months.

The Company confirms

that it remains on track to release First Quarter ending March 31, 2026 financial results on May 14, 2026, as previously announced. Mr.

Winkler has worked closely with Mr. Isaak throughout 2026 along with the other members of the finance team and is fully prepared to lead

the Company’s financial reporting process and upcoming earnings call.

Shawn Winkler

brings more than two decades of corporate finance, capital markets, and executive leadership experience to his role as Interim Chief

Financial Officer. He most recently served as Chief Financial Officer of Burrow Global, a Texas-based full-service engineering, procurement,

and construction firm serving the energy industry.

Prior to

his CFO tenure, Mr. Winkler spent 15 years as an investment banker at BMO Capital Markets and Deutsche Bank Securities, advising public

and private clients in the natural resources sector on more than $10 billion of M&A transactions. He led capital raises across the

full capital structure including IPOs, follow-on equity, high-yield and convertible notes, bank and institutional loans, and acquisition

financing associated with clients of the banks were he was employed.

Mr. Winkler

holds an MBA from Rice University's Jones Graduate School of Management, where he was named a Jones Scholar, and a Bachelor of Arts in

Economics, Managerial Studies, and Policy Studies, also from Rice University.

“Mr. Winkler

is a seasoned finance leader who has been part of our team for six months serving as an independent contractor,” said Gary C. Evans,

Chairman and CEO of US Antimony. “We are confident in his ability to take the lead of our ever growing financial team during this

period. I have personally known Shawn for approximately twenty years as he served as my prior commercial banker at both Deutsche Bank

and BMO Capital Markets. The entire Company joins me in sending Mr. Isaak our best wishes. When I hired Rick in July 2023, neither one

of us could have ever anticipated the incredible growth trajectory this company would be on over the last few years. He is an extremely

talented individual and deserves some time to recharge his batteries.”

About USAC:

United States Antimony

Corporation and its subsidiaries in the U.S., Mexico, and Canada

("USAC,"

“U.S. Antimony,” the "Company," "Our," "Us," or "We") sell antimony, zeolite, and

precious metals primarily in the U.S., Mexico, and Canada. The Company mines, purchases, and processes ore primarily into antimony oxide,

antimony metal, antimony trisulfide, and precious metals at its facilities located in Montana and Mexico. Antimony oxide is used to form

a flame-retardant system for plastics, rubber, fiberglass, textile goods, paints, coatings, and paper, as a color fastener in paint,

and as a phosphorescent agent in fluorescent light bulbs. Antimony metal is used in bearings, storage batteries, and ordnance. Antimony

trisulfide is used as a primer in ammunition. The Company also recovers precious metals, primarily gold and silver, at its Montana facility

from third party ore. At its Bear River Zeolite (“BRZ”) facility located in Idaho, the Company mines and processes zeolite,

a group of industrial minerals used in water filtration, sewage treatment, nuclear waste and other environmental cleanup, odor control,

gas separation, animal nutrition, soil amendment and fertilizer, and other miscellaneous applications. Beginning in 2024 and continuing

in 2025, the Company acquired mining claims, real properties (patented claims) and leases located in Alaska, Montana, and Ontario, Canada

in an effort to reduce the cost of third-party antimony ore purchases and to expand its product offerings.

Learn more about

United States Antimony Corporation at www.usantimony.com.

Forward-Looking Statements:

This press release

contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, including, without limitation,

statements regarding Mr. Isaak's expected return, the timing of the Company's Q1 earnings release, and the Company's financial reporting

process. These statements are based on current expectations, estimates, forecasts, and projections about the industries in which the

Company operates, as well as management’s beliefs and assumptions. Words such as “anticipates,” “expects,”

“intends,” “plans,” “believes,” “seeks,” “estimates,” “may,”

“will,” “should,” “could,” and variations of these words or similar expressions are intended to identify

such forward-looking statements.

Forward-looking

statements are subject to certain risks and uncertainties that could cause actual results to differ materially from those indicated in

such statements, including, but not limited to: fluctuations in the market prices and demand for antimony and zeolite; changes in domestic

and global economic conditions; operational risks inherent in mining and mineral processing; geological or metallurgical conditions;

availability and cost of energy, equipment, transportation, and labor; the Company’s ability to maintain or obtain permits, licenses,

and regulatory approvals; changes in environmental and mining laws or regulations; competitive factors; the impact of geopolitical developments;

and the effects of weather, natural disasters, or health pandemics on operations and supply chains. Additional information regarding

risk factors that could cause actual results to differ materially is included in the Company’s filings with the U.S. Securities

and

Exchange Commission,

including its Annual Report on Form 10-K and Quarterly Reports on Form 10-Q.

The Company undertakes

no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events, or

otherwise, except as required by law. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak

only as of the date hereof.

Investor Relations

Contact:

Media Relations

Contact:

Jonathan Miller, VP, Investor

Relations

Anthony D. Andora

4438 W. Lovers Lane, Unit 100

Edge Consulting, Inc.

Dallas, Texas 75209

1560 Market Street, Ste. 701

E-Mail: Jmiller@usantimony.com

Denver, Colorado 80202

Phone: 406-606-4117

E-Mail: Anthony@EdgeConsultingSolutions.com

Phone: 720-317-8927

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