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- Departure of CFO (new) — CFO taking indefinite leave without specified return date creates uncertainty around financial leadership continuity.
UAMY CFO Richard Isaak takes indefinite leave; Shawn Winkler named Interim CFO
Filed May 6, 2026 · Period ending May 4, 2026 · ~1 min read
Key Changes
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CFO Richard Isaak began an indefinite personal leave of absence effective May 4, 2026, and will not perform CFO duties during this period. While expected to return, no timeline has been set, creating uncertainty around permanent financial leadership.
Item 5.02 verify on EDGAR → -
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Shawn Winkler, 50, appointed Interim CFO effective May 4, 2026.
Item 5.02 verify on EDGAR → -
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Interim CFO compensation set at $20,000 monthly cash stipend plus one-time grant of 100,000 stock warrants with strike price equal to share price at market close on April 27, 2026, aligning interim executive interests with shareholders.
Item 5.02 verify on EDGAR →
Summary
United States Antimony Corporation disclosed that CFO Richard Isaak has taken an indefinite personal leave of absence effective May 4, 2026, stepping away from all CFO duties. While the company states Isaak is expected to return, the lack of a defined timeline introduces uncertainty about the duration of interim financial leadership.
The board moved quickly to appoint Shawn Winkler as Interim CFO, bringing substantial finance credentials including prior CFO experience and investment banking background advising on major transactions. For retail investors, the key concern is continuity in financial reporting and strategic oversight during what could be a critical period for the antimony producer.
Winkler's compensation package—$20,000 monthly plus 100,000 warrants—suggests the interim role could extend beyond a brief transition. The indefinite nature of Isaak's leave raises questions about whether underlying issues exist beyond the stated "personal" reasons. Watch for the next quarterly earnings call and 10-Q filing to assess whether financial reporting quality and strategic communication remain consistent under interim leadership. Any extension of the interim arrangement beyond 90 days would warrant closer scrutiny of the circumstances.
Section-by-Section Diff
Event · Item 5.02 — Departure of Directors or Certain Officers; Election of Directors; Compensation
Item 5.02 — Departure of Directors or Certain Officers; Election of Directors; Compensation filed; see Key Changes for terms.
Added in current filing · verify on EDGAR →
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, age 50, has been appointed Interim CFO effective May 4, 2026. He brings over 20 years of corporate finance and investment banking experience, most recently serving as CFO of Burrow Global and previously as an investment banker at BMO Capital Markets and Deutsche Bank Securities advising on over $10 billion in M&A transactions.
Event · Item 7.01 — Regulation FD Disclosure
Item 7.01 — Regulation FD Disclosure filed; see Key Changes for terms.
Added in current filing · verify on EDGAR →
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.
The company disclosed that CFO Richard Isaak is taking a leave of absence effective May 4, 2026. Shawn Winkler has been appointed as Interim Chief Financial Officer during this period. The press release indicates Mr. Isaak is expected to return, though no specific timeline is provided in the 8-K body.
Event · Item 9.01 — Financial Statements and Exhibits
UAMY filed an 8-K attaching a press release dated May 6, 2026; no material business event disclosed in the filing body.
Show 1 minor / wording change
Added in current filing · verify on EDGAR →
99.1 Press Release issued by United States Antimony Corporation dated May 6, 2026
The 8-K lists a press release as Exhibit 99.1 dated May 6, 2026. The filing body provides no detail on the press release content, so the nature and materiality of the disclosure cannot be determined from this 8-K alone.
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Figures/quotes linked to EDGAR · Narrative written by AI · Jun 9, 2026 · How we verify