UAMY · United States Antimony Corp

The price reported in Column 4 is a weighted average purchase price. This shares were purchased in multiple transactions at prices ranging from $7.41 to $7.50, inclusive. The Reporting Person undertakes to provide to the issuer, any security holder of the Issuer, or the SEC staff, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.05 to $9.26, inclusive. For all transactions reported in this Form 4 utilizing a weighted-average price, the reporting person will provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.

Represents shares of Common Stock underlying a time-based vesting stock option award granted on January 15, 2026 under the Issuer's Amended & Restated 2023 Equity Incentive Plan. The stock option will vest as to one-third, or 4,087 shares of the 12,259 total number of shares on January 15, 2027, and an additional one-third of the total number of shares will vest on January 18, 2028 and January 16, 2029, subject to the Reporting Person's continued service through any vesting date.

Represents shares of Common Stock underlying a time-based vesting restricted stock unit ("RSU") award granted on January 15, 2026, under the Issuer's Amended & Restated 2023 Equity Incentive Plan. One-third, or 16,918 shares of the 50,754 total number of shares of the RSU award will vest on January 15, 2026, and an additional one-third of the total number of shares will vest on January 15, 2027 and January 18, 2028, subject to the Reporting Person's continued service through each vesting date.

Represents shares of Common Stock underlying a time-based vesting restricted stock unit ("RSU") award granted on January 15, 2026, under the Issuer's Amended & Restated 2023 Equity Incentive Plan. One-third, or 13,535 shares of the 40,603 total number of shares of the RSU award will vest on January 15, 2027, and an additional one-third of the total number of shares will vest on January 18, 2028 and January 19, 2029, subject to the Reporting Person's continued service through each vesting date.

Represents shares of Common Stock underlying a time-based vesting restricted stock unit ("RSU") award granted on January 15, 2026, under the Issuer's Amended & Restated 2023 Equity Incentive Plan. One-third, or 24,362 shares of the 73,086 total number of shares of the RSU award will vest on January 15, 2026, and an additional one-third of the total number of shares will vest on January 15, 2027 and January 18, 2028, subject to the Reporting Person's continued service through each vesting date.

Represents shares of Common Stock underlying a stock option award granted on January 15, 2026 under the Issuer's Amended & Restated 2023 Equity Incentive Plan. The stock option will vest upon meeting any of the performance measures specified in the grant at any time during the 10-year term of the award, subject to the Reporting Person's continued service through any vesting date.

Represents shares of Common Stock underlying a stock option award granted on January 15, 2026 under the Issuer's Amended & Restated 2023 Equity Incentive Plan. The stock option will vest upon meeting any of the performance measures specified in the grant at any time during the 10-year term of the award, subject to the Reporting Person's continued service through any vesting date.

Represents shares of Common Stock underlying a time-based vesting restricted stock unit ("RSU") award granted on January 15, 2026, under the Issuer's Amended & Restated 2023 Equity Incentive Plan. One-third, or 24,362 shares of the 73,086 total number of shares of the RSU award will vest on January 15, 2026, and an additional one-third of the total number of shares will vest on January 15, 2027 and January 18, 2028, subject to the Reporting Person's continued service through each vesting date.

Represents shares of Common Stock underlying a time-based vesting restricted stock unit ("RSU") award granted on January 15, 2026, under the Issuer's Amended & Restated 2023 Equity Incentive Plan. One-third, or 553 shares of the 1,659 total number of shares of the RSU award will vest on January 15, 2027, and an additional one-third of the total number of shares will vest on January 18, 2028 and January 16, 2029, subject to the Reporting Person's continued service through each vesting date.

Represents shares of Common Stock underlying a time-based vesting restricted stock unit ("RSU") award granted on January 15, 2026, under the Issuer's Amended & Restated 2023 Equity Incentive Plan. One-third, or 6,635 shares of the 19,903 total number of shares of the RSU award will vest on January 15, 2026, and an additional one-third of the total number of shares will vest on January 15, 2027 and January 18, 2028, subject to the Reporting Person's continued service through each vesting date.

Represents shares of Common Stock underlying a time-based vesting restricted stock unit ("RSU") award granted on January 15, 2026, under the Issuer's Amended & Restated 2023 Equity Incentive Plan. One-third, or 6,635 shares of the 19,903 total number of shares of the RSU award will vest on January 15, 2026, and an additional one-third of the total number of shares will vest on January 15, 2027 and January 18, 2028, subject to the Reporting Person's continued service through each vesting date.

Represents shares of Common Stock underlying a stock option award granted on January 15, 2026 under the Issuer's Amended & Restated 2023 Equity Incentive Plan. The stock option will vest upon meeting any of the performance measures specified in the grant at any time during the 10-year term of the award, subject to the Reporting Person's continued service through any vesting date.

Represents shares of Common Stock underlying a time-based vesting stock option award granted on January 15, 2026 under the Issuer's Amended & Restated 2023 Equity Incentive Plan. The stock option will vest as to one-third, or 341 shares of the 1,022 total number of shares on January 15, 2027, and an additional one-third of the total number of shares will vest on January 18, 2028 and January 16, 2029, subject to the Reporting Person's continued service through any vesting date.

Represents shares of Common Stock underlying a stock option award granted on January 15, 2026 under the Issuer's Amended & Restated 2023 Equity Incentive Plan. The stock option will vest upon meeting any of the performance measures specified in the grant at any time during the 10-year term of the award, subject to the Reporting Person's continued service through any vesting date.

Represents shares of Common Stock underlying a time-based vesting restricted stock unit ("RSU") award granted on January 15, 2026, under the Issuer's Amended & Restated 2023 Equity Incentive Plan. One-third, or 2,488 shares of the 7,464 total number of shares of the RSU award will vest on January 15, 2027, and an additional one-third of the total number of shares will vest on January 18, 2028 and January 16, 2029, subject to the Reporting Person's continued service through each vesting date.

Represents shares of Common Stock underlying a time-based vesting restricted stock unit ("RSU") award granted on January 15, 2026, under the Issuer's Amended & Restated 2023 Equity Incentive Plan. One-third, or 7,652 shares of the 22,955 total number of shares of the RSU award will vest on January 15, 2027, and an additional one-third of the total number of shares will vest on January 18, 2028 and January 19, 2029, subject to the Reporting Person's continued service through each vesting date.

Represents shares of Common Stock underlying a time-based vesting restricted stock unit ("RSU") award granted on January 15, 2026, under the Issuer's Amended & Restated 2023 Equity Incentive Plan. One-third, or 101,508 shares of the 304,524 total number of shares of the RSU award will vest on January 15, 2026, and an additional one-third of the total number of shares will vest on January 15, 2027 and January 18, 2028, subject to the Reporting Person's continued service through each vesting date.

Represents shares of Common Stock underlying a stock option award granted on January 15, 2026 under the Issuer's Amended & Restated 2023 Equity Incentive Plan. The stock option will vest upon meeting any of the performance measures specified in the grant at any time during the 10-year term of the award, subject to the Reporting Person's continued service through any vesting date.

Represents shares of Common Stock underlying a time-based vesting stock option award granted on January 15, 2026 under the Issuer's Amended & Restated 2023 Equity Incentive Plan. The stock option will vest as to one-third, or 4,087 shares of the 12,259 total number of shares on January 15, 2027, and an additional one-third of the total number of shares will vest on January 18, 2028 and January 16, 2029, subject to the Reporting Person's continued service through any vesting date.

Represents shares of Common Stock underlying a time-based vesting stock option award granted on January 15, 2026 under the Issuer's Amended & Restated 2023 Equity Incentive Plan. The stock option will vest as to one-third, or 1,533 shares of the 4,597 total number of shares on January 15, 2027, and an additional one-third of the total number of shares will vest on January 18, 2028 and January 16, 2029, subject to the Reporting Person's continued service through any vesting date.

Represents shares of Common Stock underlying a stock option award granted on January 15, 2026 under the Issuer's Amended & Restated 2023 Equity Incentive Plan. The stock option will vest upon meeting any of the performance measures specified in the grant at any time during the 10-year term of the award, subject to the Reporting Person's continued service through any vesting date.

Represents shares of Common Stock underlying a time-based vesting restricted stock unit ("RSU") award granted on January 15, 2026, under the Issuer's Amended & Restated 2023 Equity Incentive Plan. One-third, or 6,635 shares of the 19,903 total number of shares of the RSU award will vest on January 15, 2026, and an additional one-third of the total number of shares will vest on January 15, 2027 and January 18, 2028, subject to the Reporting Person's continued service through each vesting date.

Represents shares of Common Stock underlying a time-based vesting stock option award granted on January 15, 2026 under the Issuer's Amended & Restated 2023 Equity Incentive Plan. The stock option will vest as to one-third, or 4,087 shares of the 12,259 total number of shares on January 15, 2027, and an additional one-third of the total number of shares will vest on January 18, 2028 and January 16, 2029, subject to the Reporting Person's continued service through any vesting date.