US Antimony (UAMY) installs interim CFO as Isaak starts temporary leave
Rhea-AI Filing Summary
United States Antimony Corporation announced that Chief Financial Officer Richard Isaak has begun a temporary personal leave of absence effective May 4, 2026. The company states the leave is strictly personal and unrelated to financial performance, accounting, internal controls, or financial reporting.
The Board appointed former financial consultant Shawn Winkler, age 50, as Interim Chief Financial Officer and principal financial officer, effective May 4, 2026. Winkler will receive a monthly cash stipend of $20,000 and a one-time grant of 100,000 stock purchase warrants with a strike price set at the April 27, 2026 closing share price.
Mr. Isaak is expected to return after the leave, currently anticipated to last at least two months. The company also reaffirmed plans to release financial results for the quarter ended March 31, 2026 on May 14, 2026, with Winkler leading the financial reporting process and upcoming earnings call.
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Insights
US Antimony installs experienced interim CFO while emphasizing continuity.
United States Antimony has its CFO, Richard Isaak, on temporary personal leave, explicitly stating the leave is not tied to financial performance, accounting practices, internal controls, or financial reporting. This framing seeks to limit concerns about financial integrity or restatement risk.
The Board named Shawn Winkler, a former financial consultant to the company with over two decades in corporate finance and capital markets, as Interim CFO. His compensation includes a monthly cash stipend of $20,000 and 100,000 stock purchase warrants, aligning part of his incentives with shareholders.
The company reiterates it remains on track to release Q1 results for the period ended March 31, 2026 on May 14, 2026. Actual impact on operations and market perception will depend on the smoothness of financial reporting under interim leadership and the timing of Isaak’s expected return after at least two months.
8-K Event Classification
Key Figures
Key Terms
Interim Chief Financial Officer financial
stock purchase warrants financial
Regulation FD Disclosure regulatory
forward-looking statements regulatory
emerging growth company regulatory
principal financial officer financial
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM
CURRENT REPORT
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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 | ||||
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. |
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| E-Mail: Jmiller@usantimony.com | Denver, Colorado 80202 |
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| Phone: 720-317-8927 |