WWR · Westwater Resources, Inc.

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.5725 to $0.5750, inclusive. The reporting person undertakes to provide to Westwater Resources, Inc. any stockholder of Westwater Resources, Inc., or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this Footnote No. 2 to this Form 4.

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.5725 to $0.5745, inclusive. The reporting person undertakes to provide to Westwater Resources, Inc. any stockholder of Westwater Resources, Inc., or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this Footnote No. 3 to this Form 4.

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.5725 to $0.5753, inclusive. The reporting person undertakes to provide to Westwater Resources, Inc. any stockholder of Westwater Resources, Inc., or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this Footnote No. 2 to this Form 4.

Represents restricted stock units that vest in three equal annual installments beginning December 31, 2026. Each restricted stock unit represents a contingent right to receive one share of the issuer's common stock.

Represents restricted stock units that vest on the earlier of Westwater Resources, Inc.'s next Annual General Meeting of Stockholders, or May 22, 2027.

Represents restricted stock units that vest on the earlier of Westwater Resources, Inc.'s next Annual General Meeting of Stockholders, or May 22, 2027.

Represents restricted stock units that vest in three equal annual installments beginning December 31, 2026. Each restricted stock unit represents a contingent right to receive one share of the issuer's common stock.

Represents restricted stock units that vest one-third based on total stockholder return ("TSR") for the year ended December 31, 2026, one-third based on TSR for the year ended December 31, 2027, and one-third based on TSR for the year ended December 31, 2028.

Represents restricted stock units that vest one-third based on total stockholder return ("TSR") for the year ended December 31, 2026, one-third based on TSR for the year ended December 31, 2027, and one-third based on TSR for the year ended December 31, 2028.

Represents restricted stock units that vest one-third based on total stockholder return ("TSR") for the year ended December 31, 2026, one-third based on TSR for the year ended December 31, 2027, and one-third based on TSR for the year ended December 31, 2028.

Represents restricted stock units that vest on the earlier of Westwater Resources, Inc.'s next Annual General Meeting of Stockholders, or May 22, 2027.

Represents restricted stock units that vest in three equal annual installments beginning December 31, 2026. Each restricted stock unit represents a contingent right to receive one share of the issuer's common stock.

Represents restricted stock units that vest in three equal annual installments beginning December 31, 2026. Each restricted stock unit represents a contingent right to receive one share of the issuer's common stock.

Represents restricted stock units that vest one-third based on total stockholder return ("TSR") for the year ended December 31, 2026, one-third based on TSR for the year ended December 31, 2027, and one-third based on TSR for the year ended December 31, 2028.

Represents the shares of common stock withheld by the Company in satisfaction of the reporting person's tax withholding obligation arising as a result of the partial vesting of the restricted stock unit award granted on May 27, 2025.

Represents shares of common stock issued upon the partial vesting of restricted stock units subject to performance based-vesting criteria under the Company's May 10, 2023 grant.

Represents the shares of common stock withheld by the Company in satisfaction of the reporting person's tax withholding obligation arising as a result of the partial vesting of the restricted stock unit award granted on May 30, 2024.

Represents shares of common stock issued upon the partial vesting of restricted stock units subject to performance based-vesting criteria under the Company's May 30, 2024 grant.

Represents restricted stock units that vest one-third based on TSR for the year ended December 31, 2025, one-third based on TSR for the year ended December 31, 2026, and one-third based on TSR for the year ended December 31, 2027, with the number of restricted stock units potentially vesting divided equally among the annual periods.

Represents the shares of common stock withheld by the Company in satisfaction of the reporting person's tax withholding obligation arising as a result of the partial vesting of the restricted stock unit award granted on May 27, 2025.

Represents the shares of common stock withheld by the Company in satisfaction of the reporting person's tax withholding obligation arising as a result of the partial vesting of the restricted stock unit award granted on May 30, 2024.

Represents the shares of common stock withheld by the Company in satisfaction of the reporting person's tax withholding obligation arising as a result of the partial vesting of the restricted stock unit award granted on May 27, 2025.

Represents the shares of common stock withheld by the Company in satisfaction of the reporting person's tax withholding obligation arising as a result of the partial vesting of the restricted stock unit award granted on May 27, 2025.

Represents the shares of common stock withheld by the Company in satisfaction of the reporting person's tax withholding obligation arising as a result of the partial vesting of the restricted stock unit award granted on May 27, 2025.

Represents restricted stock units that vest one-third based on TSR for the year ended December 31, 2024, one-third based on TSR for the year ended December 31, 2025, and one-third based on TSR for the year ended December 31, 2026, with the number of restricted stock units potentially vesting divided equally among the annual periods.

Represents the shares of common stock withheld by the Company in satisfaction of the reporting person's tax withholding obligation arising as a result of the partial vesting of the restricted stock unit award granted on May 30, 2024.

Represents the shares of common stock withheld by the Company in satisfaction of the reporting person's tax withholding obligation arising as a result of the partial vesting of the restricted stock unit award granted on May 10, 2023.

Represents shares of common stock issued upon the partial vesting of restricted stock units subject to performance based-vesting criteria under the Company's May 30, 2024 grant.

Represents the shares of common stock withheld by the Company in satisfaction of the reporting person's tax withholding obligation arising as a result of the partial vesting of the restricted stock unit award granted on May 10, 2023.

Represents the shares of common stock withheld by the Company in satisfaction of the reporting person's tax withholding obligation arising as a result of the partial vesting of the restricted stock unit award granted on May 27, 2025.

Represents shares of common stock issued upon the partial vesting of restricted stock units subject to performance based-vesting criteria under the Company's May 27, 2025 grant.

Represents the shares of common stock withheld by the Company in satisfaction of the reporting person's tax withholding obligation arising as a result of the partial vesting of the restricted stock unit award granted on May 30, 2024.

Represents the shares of common stock withheld by the Company in satisfaction of the reporting person's tax withholding obligation arising as a result of the partial vesting of the restricted stock unit award granted on May 27, 2025.

Represents restricted stock units that vest one-third based on TSR for the year ended December 31, 2024, one-third based on TSR for the year ended December 31, 2025, and one-third based on TSR for the year ended December 31, 2026, with the number of restricted stock units potentially vesting divided equally among the annual periods.

Represents the shares of common stock withheld by the Company in satisfaction of the reporting person's tax withholding obligation arising as a result of the partial vesting of the restricted stock unit award granted on May 27, 2025.

Represents the shares of common stock withheld by the Company in satisfaction of the reporting person's tax withholding obligation arising as a result of the partial vesting of the restricted stock unit award granted on May 27, 2025.

Represents restricted stock units that vest one-third based on TSR for the year ended December 31, 2025, one-third based on TSR for the year ended December 31, 2026, and one-third based on TSR for the year ended December 31, 2027, with the number of restricted stock units potentially vesting divided equally among the annual periods.

Represents shares of common stock issued upon the partial vesting of restricted stock units subject to total stockholder return ("TSR") criteria under the Company's May 27, 2025 grant.

Represents shares of common stock issued upon the partial vesting of restricted stock units subject to performance based-vesting criteria under the Company's May 30, 2024 grant.

Represents the shares of common stock withheld by the Company in satisfaction of the reporting person's tax withholding obligation arising as a result of the partial vesting of the restricted stock unit award granted on May 27, 2025.

Represents the shares of common stock withheld by the Company in satisfaction of the reporting person's tax withholding obligation arising as a result of the partial vesting of the restricted stock unit award granted on May 30, 2024.

Represents shares of common stock issued upon the partial vesting of restricted stock units subject to total stockholder return ("TSR") criteria under the Company's May 30, 2024 grant.

Represents shares of common stock issued upon the partial vesting of restricted stock units subject to performance based-vesting criteria under the Company's May 27, 2025 grant.

Represents shares of common stock issued upon the partial vesting of restricted stock units subject to performance based-vesting criteria under the Company's May 27, 2025 grant.

Represents the shares of common stock withheld by the Company in satisfaction of the reporting person's tax withholding obligation arising as a result of the partial vesting of the restricted stock unit award granted on May 30, 2024.

Represents the shares of common stock withheld by the Company in satisfaction of the reporting person's tax withholding obligation arising as a result of the partial vesting of the restricted stock unit award granted on May 30, 2024.

Represents the shares of common stock withheld by the Company in satisfaction of the reporting person's tax withholding obligation arising as a result of the partial vesting of the restricted stock unit award granted on May 30, 2024.

Represents shares of common stock issued upon the partial vesting of restricted stock units subject to performance based-vesting criteria under the Company's May 27, 2025 grant.

Represents restricted stock units that vest one-third based on TSR for the year ended December 31, 2024, one-third based on TSR for the year ended December 31, 2025, and one-third based on TSR for the year ended December 31, 2026, with the number of restricted stock units potentially vesting divided equally among the annual periods.

Represents the shares of common stock withheld by the Company in satisfaction of the reporting person's tax withholding obligation arising as a result of the partial vesting of the restricted stock unit award granted on May 30, 2024.