Anderson Karli S.

SEC source: 0001104659-26-094271 · tm2622881-1_4seq1.xml · nonDerivative · entry 1

Anderson Karli S. · CIK 0001577417 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 790,909

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 2, 2026.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.7500 to $0.7643, 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.

SEC source: 0001104659-26-067111 · tm2615699-3_4seq1.xml · nonDerivative · entry 1

Anderson Karli S. · CIK 0001577417 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 840,909

F1 · security: Represents restricted stock units that vest on the earlier of Westwater Resources, Inc.'s next Annual General Meeting of Stockholders, or May 22, 2027.

SEC source: 0001104659-25-099411 · tm2528550-1_4seq1.xml · derivative · entry 4

Anderson Karli S. · CIK 0001577417 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 227,808

Underlying: Common Stock · 16,390 shares

Expires 2035-05-27

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001104659-25-099411 · tm2528550-1_4seq1.xml · derivative · entry 3

Anderson Karli S. · CIK 0001577417 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 244,198

Underlying: Common Stock · 224,519 shares

Expires 2034-05-30

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001104659-25-099411 · tm2528550-1_4seq1.xml · nonDerivative · entry 2

Anderson Karli S. · CIK 0001577417 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 640,909

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001104659-25-099411 · tm2528550-1_4seq1.xml · nonDerivative · entry 1

Anderson Karli S. · CIK 0001577417 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 624,519

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001104659-25-054386 · tm2516465-1_4seq1.xml · derivative · entry 3

Anderson Karli S. · CIK 0001577417 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 468,717

Underlying: Common Stock · 16,390 shares

Expires 2035-05-27

F3 · security: Represents non-qualified stock options that vest immediately. Each non-qualified restricted stock unit represents a contingent right to receive one share of the issuer's common stock.

SEC source: 0001104659-25-054386 · tm2516465-1_4seq1.xml · derivative · entry 2

Anderson Karli S. · CIK 0001577417 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 452,327

Underlying: Common Stock · 224,519 shares

Expires 2034-05-30

F2 · derivative.exercise_price: Represents non-qualified stock options that vested on May 27, 2025, with the exercise price corrected from the previously reported price of $0.3943.

SEC source: 0001104659-25-054386 · tm2516465-1_4seq1.xml · nonDerivative · entry 1

Anderson Karli S. · CIK 0001577417 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 400,000

F1 · security: Represents restricted stock units that vest at the earlier of Westwater Resources, Inc.'s next Annual General Meeting of Stockholders, or May 27, 2026.

SEC source: 0000950103-25-001827 · dp224680_4-andersonk.xml · derivative · entry 4

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 13,589 shares

Expires not disclosed

F1 · derivative.exercise_price: At or immediately prior to the effective time of the transactions contemplated by the Agreement and Plan of Merger, dated November 24, 2024, by and among Summit Materials, Inc., Quikrete Holdings, Inc., and Soar Subsidiary, Inc., (i) each share of Class A common stock of the issuer held by the reporting person was canceled, retired and converted into the right to receive $52.50 in cash (the "Merger Consideration"), (ii) each restricted stock unit held by the reporting person was fully vested, canceled and converted into the right to receive the Merger Consideration and (iii) each performance stock unit award held by the reporting person was vested based on target performance, canceled and converted into the right to receive the Merger Consideration.

F1 · price: At or immediately prior to the effective time of the transactions contemplated by the Agreement and Plan of Merger, dated November 24, 2024, by and among Summit Materials, Inc., Quikrete Holdings, Inc., and Soar Subsidiary, Inc., (i) each share of Class A common stock of the issuer held by the reporting person was canceled, retired and converted into the right to receive $52.50 in cash (the "Merger Consideration"), (ii) each restricted stock unit held by the reporting person was fully vested, canceled and converted into the right to receive the Merger Consideration and (iii) each performance stock unit award held by the reporting person was vested based on target performance, canceled and converted into the right to receive the Merger Consideration.

F1 · derivative.exercise_date: At or immediately prior to the effective time of the transactions contemplated by the Agreement and Plan of Merger, dated November 24, 2024, by and among Summit Materials, Inc., Quikrete Holdings, Inc., and Soar Subsidiary, Inc., (i) each share of Class A common stock of the issuer held by the reporting person was canceled, retired and converted into the right to receive $52.50 in cash (the "Merger Consideration"), (ii) each restricted stock unit held by the reporting person was fully vested, canceled and converted into the right to receive the Merger Consideration and (iii) each performance stock unit award held by the reporting person was vested based on target performance, canceled and converted into the right to receive the Merger Consideration.

F1 · derivative.expiration_date: At or immediately prior to the effective time of the transactions contemplated by the Agreement and Plan of Merger, dated November 24, 2024, by and among Summit Materials, Inc., Quikrete Holdings, Inc., and Soar Subsidiary, Inc., (i) each share of Class A common stock of the issuer held by the reporting person was canceled, retired and converted into the right to receive $52.50 in cash (the "Merger Consideration"), (ii) each restricted stock unit held by the reporting person was fully vested, canceled and converted into the right to receive the Merger Consideration and (iii) each performance stock unit award held by the reporting person was vested based on target performance, canceled and converted into the right to receive the Merger Consideration.

SEC source: 0000950103-25-001827 · dp224680_4-andersonk.xml · derivative · entry 3

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 9,222 shares

Expires not disclosed

F1 · derivative.exercise_price: At or immediately prior to the effective time of the transactions contemplated by the Agreement and Plan of Merger, dated November 24, 2024, by and among Summit Materials, Inc., Quikrete Holdings, Inc., and Soar Subsidiary, Inc., (i) each share of Class A common stock of the issuer held by the reporting person was canceled, retired and converted into the right to receive $52.50 in cash (the "Merger Consideration"), (ii) each restricted stock unit held by the reporting person was fully vested, canceled and converted into the right to receive the Merger Consideration and (iii) each performance stock unit award held by the reporting person was vested based on target performance, canceled and converted into the right to receive the Merger Consideration.

F1 · price: At or immediately prior to the effective time of the transactions contemplated by the Agreement and Plan of Merger, dated November 24, 2024, by and among Summit Materials, Inc., Quikrete Holdings, Inc., and Soar Subsidiary, Inc., (i) each share of Class A common stock of the issuer held by the reporting person was canceled, retired and converted into the right to receive $52.50 in cash (the "Merger Consideration"), (ii) each restricted stock unit held by the reporting person was fully vested, canceled and converted into the right to receive the Merger Consideration and (iii) each performance stock unit award held by the reporting person was vested based on target performance, canceled and converted into the right to receive the Merger Consideration.

F1 · derivative.exercise_date: At or immediately prior to the effective time of the transactions contemplated by the Agreement and Plan of Merger, dated November 24, 2024, by and among Summit Materials, Inc., Quikrete Holdings, Inc., and Soar Subsidiary, Inc., (i) each share of Class A common stock of the issuer held by the reporting person was canceled, retired and converted into the right to receive $52.50 in cash (the "Merger Consideration"), (ii) each restricted stock unit held by the reporting person was fully vested, canceled and converted into the right to receive the Merger Consideration and (iii) each performance stock unit award held by the reporting person was vested based on target performance, canceled and converted into the right to receive the Merger Consideration.

F1 · derivative.expiration_date: At or immediately prior to the effective time of the transactions contemplated by the Agreement and Plan of Merger, dated November 24, 2024, by and among Summit Materials, Inc., Quikrete Holdings, Inc., and Soar Subsidiary, Inc., (i) each share of Class A common stock of the issuer held by the reporting person was canceled, retired and converted into the right to receive $52.50 in cash (the "Merger Consideration"), (ii) each restricted stock unit held by the reporting person was fully vested, canceled and converted into the right to receive the Merger Consideration and (iii) each performance stock unit award held by the reporting person was vested based on target performance, canceled and converted into the right to receive the Merger Consideration.

SEC source: 0000950103-25-001827 · dp224680_4-andersonk.xml · derivative · entry 2

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 15,289 shares

Expires not disclosed

F1 · derivative.exercise_price: At or immediately prior to the effective time of the transactions contemplated by the Agreement and Plan of Merger, dated November 24, 2024, by and among Summit Materials, Inc., Quikrete Holdings, Inc., and Soar Subsidiary, Inc., (i) each share of Class A common stock of the issuer held by the reporting person was canceled, retired and converted into the right to receive $52.50 in cash (the "Merger Consideration"), (ii) each restricted stock unit held by the reporting person was fully vested, canceled and converted into the right to receive the Merger Consideration and (iii) each performance stock unit award held by the reporting person was vested based on target performance, canceled and converted into the right to receive the Merger Consideration.

F1 · price: At or immediately prior to the effective time of the transactions contemplated by the Agreement and Plan of Merger, dated November 24, 2024, by and among Summit Materials, Inc., Quikrete Holdings, Inc., and Soar Subsidiary, Inc., (i) each share of Class A common stock of the issuer held by the reporting person was canceled, retired and converted into the right to receive $52.50 in cash (the "Merger Consideration"), (ii) each restricted stock unit held by the reporting person was fully vested, canceled and converted into the right to receive the Merger Consideration and (iii) each performance stock unit award held by the reporting person was vested based on target performance, canceled and converted into the right to receive the Merger Consideration.

F1 · derivative.exercise_date: At or immediately prior to the effective time of the transactions contemplated by the Agreement and Plan of Merger, dated November 24, 2024, by and among Summit Materials, Inc., Quikrete Holdings, Inc., and Soar Subsidiary, Inc., (i) each share of Class A common stock of the issuer held by the reporting person was canceled, retired and converted into the right to receive $52.50 in cash (the "Merger Consideration"), (ii) each restricted stock unit held by the reporting person was fully vested, canceled and converted into the right to receive the Merger Consideration and (iii) each performance stock unit award held by the reporting person was vested based on target performance, canceled and converted into the right to receive the Merger Consideration.

F1 · derivative.expiration_date: At or immediately prior to the effective time of the transactions contemplated by the Agreement and Plan of Merger, dated November 24, 2024, by and among Summit Materials, Inc., Quikrete Holdings, Inc., and Soar Subsidiary, Inc., (i) each share of Class A common stock of the issuer held by the reporting person was canceled, retired and converted into the right to receive $52.50 in cash (the "Merger Consideration"), (ii) each restricted stock unit held by the reporting person was fully vested, canceled and converted into the right to receive the Merger Consideration and (iii) each performance stock unit award held by the reporting person was vested based on target performance, canceled and converted into the right to receive the Merger Consideration.

SEC source: 0000950103-25-001827 · dp224680_4-andersonk.xml · nonDerivative · entry 1

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · shares: At or immediately prior to the effective time of the transactions contemplated by the Agreement and Plan of Merger, dated November 24, 2024, by and among Summit Materials, Inc., Quikrete Holdings, Inc., and Soar Subsidiary, Inc., (i) each share of Class A common stock of the issuer held by the reporting person was canceled, retired and converted into the right to receive $52.50 in cash (the "Merger Consideration"), (ii) each restricted stock unit held by the reporting person was fully vested, canceled and converted into the right to receive the Merger Consideration and (iii) each performance stock unit award held by the reporting person was vested based on target performance, canceled and converted into the right to receive the Merger Consideration.

F1 · price: At or immediately prior to the effective time of the transactions contemplated by the Agreement and Plan of Merger, dated November 24, 2024, by and among Summit Materials, Inc., Quikrete Holdings, Inc., and Soar Subsidiary, Inc., (i) each share of Class A common stock of the issuer held by the reporting person was canceled, retired and converted into the right to receive $52.50 in cash (the "Merger Consideration"), (ii) each restricted stock unit held by the reporting person was fully vested, canceled and converted into the right to receive the Merger Consideration and (iii) each performance stock unit award held by the reporting person was vested based on target performance, canceled and converted into the right to receive the Merger Consideration.

SEC source: 0001628280-25-001884 · wk-form4_1737152910.xml · nonDerivative · entry 2

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,285

SEC source: 0001628280-25-001884 · wk-form4_1737152910.xml · nonDerivative · entry 1

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,603

F1 · acquired: Reflects shares of Class A Common Stock earned and delivered on performance units previously granted based upon the satisfaction of certain performance criteria.

SEC source: 0001628280-25-001884 · wk-form4_1737152910.xml · derivative · entry 3

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,289

Underlying: Class A Common Stock · 15,289 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Class A Common Stock. The restricted stock units will be settled in either Class A Common Stock or cash (or a combination thereof) at the discretion of the Issuer's Human Capital and Compensation Committee.

F3 · derivative.exercise_date: These restricted stock units vest in three equal annual installments beginning on January 15, 2026.

F3 · derivative.expiration_date: These restricted stock units vest in three equal annual installments beginning on January 15, 2026.

SEC source: 0001628280-24-052432 · wk-form4_1735247754.xml · derivative · entry 7

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 13,589 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F8 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Class A Common Stock. The restricted stock units will be settled in either Class A Common Stock or cash (or a combination thereof) at the discretion of the Issuer's Human Capital and Compensation Committee.

F5 · shares: Reflects the accelerated vesting of restricted stock units for the purpose of reducing or eliminating the excise tax imposed under Sections 280G and 4999 of the Internal Revenue Code of 1986, as amended, that would be imposed on amounts payable to the Reporting Person in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated as of November 24, 2024, by and among the Issuer, Quikrete Holdings, Inc. (Purchaser), and Soar Subsidiary, Inc., a wholly owned subsidiary of Purchaser.

F9 · derivative.exercise_date: These restricted stock units would otherwise vest in three equal annual installments on each of February 28, 2025, February 28, 2026 and February 28, 2027.

F9 · derivative.expiration_date: These restricted stock units would otherwise vest in three equal annual installments on each of February 28, 2025, February 28, 2026 and February 28, 2027.

SEC source: 0001628280-24-052432 · wk-form4_1735247754.xml · derivative · entry 6

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 6,148 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Class A common stock of the Issuer ("Class A Common Stock"). The restricted stock units will be settled in either Class A Common Stock or cash (or a combination thereof) at the discretion of the Issuer's Human Capital and Compensation Committee.

F5 · shares: Reflects the accelerated vesting of restricted stock units for the purpose of reducing or eliminating the excise tax imposed under Sections 280G and 4999 of the Internal Revenue Code of 1986, as amended, that would be imposed on amounts payable to the Reporting Person in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated as of November 24, 2024, by and among the Issuer, Quikrete Holdings, Inc. (Purchaser), and Soar Subsidiary, Inc., a wholly owned subsidiary of Purchaser.

F7 · derivative.exercise_date: These restricted stock units would otherwise vest in two equal annual installments on each of February 28, 2025 and February 28, 2026.

F7 · derivative.expiration_date: These restricted stock units would otherwise vest in two equal annual installments on each of February 28, 2025 and February 28, 2026.

SEC source: 0001628280-24-052432 · wk-form4_1735247754.xml · derivative · entry 5

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 2,409 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Class A common stock of the Issuer ("Class A Common Stock"). The restricted stock units will be settled in either Class A Common Stock or cash (or a combination thereof) at the discretion of the Issuer's Human Capital and Compensation Committee.

F5 · shares: Reflects the accelerated vesting of restricted stock units for the purpose of reducing or eliminating the excise tax imposed under Sections 280G and 4999 of the Internal Revenue Code of 1986, as amended, that would be imposed on amounts payable to the Reporting Person in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated as of November 24, 2024, by and among the Issuer, Quikrete Holdings, Inc. (Purchaser), and Soar Subsidiary, Inc., a wholly owned subsidiary of Purchaser.

F6 · derivative.exercise_date: These restricted stock units would otherwise vest on February 28, 2025.

F6 · derivative.expiration_date: These restricted stock units would otherwise vest on February 28, 2025.

SEC source: 0001628280-24-052432 · wk-form4_1735247754.xml · nonDerivative · entry 4

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 43,016

SEC source: 0001628280-24-052432 · wk-form4_1735247754.xml · nonDerivative · entry 3

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,706

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Reflects restricted stock units that upon vesting converted into shares of Class A common stock of the Issuer ("Class A Common Stock") on a one-for-one basis.

SEC source: 0001628280-24-052432 · wk-form4_1735247754.xml · nonDerivative · entry 2

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,117

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Reflects restricted stock units that upon vesting converted into shares of Class A common stock of the Issuer ("Class A Common Stock") on a one-for-one basis.

SEC source: 0001628280-24-052432 · wk-form4_1735247754.xml · nonDerivative · entry 1

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,969

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Reflects restricted stock units that upon vesting converted into shares of Class A common stock of the Issuer ("Class A Common Stock") on a one-for-one basis.

F2 · balance_after: Total holdings include shares of Class A Common Stock received pursuant to a stock dividend paid on December 29, 2022.

F3 · balance_after: Total holdings include shares of Class A Common Stock acquired through the Issuer's Employee Stock Purchase Plan on April 14, 2022, October 18, 2022, May 28, 2023, November 30, 2023 and May 31, 2024.

SEC source: 0001104659-24-067961 · tm2416292-5_4seq1.xml · derivative · entry 1

Anderson Karli S. · CIK 0001577417 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 452,327

Underlying: Common Stock · 224,519 shares

Expires 2034-05-30

F1 · security: The Call Options vest on the earlier of Westwater Resources, Inc.'s next Annual General Meeting of Stockholders or May 30, 2025.

F1 · derivative.exercise_date: The Call Options vest on the earlier of Westwater Resources, Inc.'s next Annual General Meeting of Stockholders or May 30, 2025.

SEC source: 0001628280-24-010118 · wk-form4_1709947380.xml · derivative · entry 3

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,589

Underlying: Class A Common Stock · 13,589 shares

Expires not disclosed

F4 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Class A Common Stock. The restricted stock units will be settled in either Class A Common Stock or cash (or a combination thereof) at the discretion of the Issuer's Human Capital and Compensation Committee.

F5 · derivative.exercise_date: These restricted stock units vest in three equal annual installments beginning on February 28, 2025.

F5 · derivative.expiration_date: These restricted stock units vest in three equal annual installments beginning on February 28, 2025.

SEC source: 0001628280-24-010118 · wk-form4_1709947380.xml · nonDerivative · entry 2

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,733

SEC source: 0001628280-24-010118 · wk-form4_1709947380.xml · nonDerivative · entry 1

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,731

F1 · acquired: Reflects shares of Class A Common Stock earned and delivered on performance units previously granted based upon the satisfaction of certain performance criteria.

F2 · balance_after: Total holdings include shares of Class A Common Stock received pursuant to a stock dividend paid on December 29, 2022.

F3 · balance_after: Total holdings include shares of Class A Common Stock acquired through the Issuer's Employee Stock Purchase Plan on April 14, 2022, October 18, 2022, May 28, 2023 and November 30, 2023.

SEC source: 0001628280-24-008672 · wk-form4_1709594369.xml · derivative · entry 7

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,148

Underlying: Class A Common Stock · 3,074 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Class A common stock of the Issuer ("Class A Common Stock"). The restricted stock units will be settled in either Class A Common Stock or cash (or a combination thereof) at the discretion of the Issuer's Human Capital and Compensation Committee.

F7 · derivative.exercise_date: These restricted stock units vest in three equal annual installments beginning on February 29, 2024.

F7 · derivative.expiration_date: These restricted stock units vest in three equal annual installments beginning on February 29, 2024.

SEC source: 0001628280-24-008672 · wk-form4_1709594369.xml · derivative · entry 6

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,409

Underlying: Class A Common Stock · 2,409 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Class A common stock of the Issuer ("Class A Common Stock"). The restricted stock units will be settled in either Class A Common Stock or cash (or a combination thereof) at the discretion of the Issuer's Human Capital and Compensation Committee.

F6 · derivative.exercise_date: These restricted stock units vest in three equal annual installments beginning on February 28, 2023.

F6 · derivative.expiration_date: These restricted stock units vest in three equal annual installments beginning on February 28, 2023.

SEC source: 0001628280-24-008672 · wk-form4_1709594369.xml · derivative · entry 5

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 2,369 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Class A common stock of the Issuer ("Class A Common Stock"). The restricted stock units will be settled in either Class A Common Stock or cash (or a combination thereof) at the discretion of the Issuer's Human Capital and Compensation Committee.

F5 · derivative.exercise_date: These restricted stock units vested on February 29, 2024.

F5 · derivative.expiration_date: These restricted stock units vested on February 29, 2024.

SEC source: 0001628280-24-008672 · wk-form4_1709594369.xml · nonDerivative · entry 4

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,311

SEC source: 0001628280-24-008672 · wk-form4_1709594369.xml · nonDerivative · entry 3

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,838

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Reflects restricted stock units that upon vesting converted into shares of Class A common stock of the Issuer ("Class A Common Stock") on a one-for-one basis.

SEC source: 0001628280-24-008672 · wk-form4_1709594369.xml · nonDerivative · entry 2

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,764

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Reflects restricted stock units that upon vesting converted into shares of Class A common stock of the Issuer ("Class A Common Stock") on a one-for-one basis.

SEC source: 0001628280-24-008672 · wk-form4_1709594369.xml · nonDerivative · entry 1

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,355

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Reflects restricted stock units that upon vesting converted into shares of Class A common stock of the Issuer ("Class A Common Stock") on a one-for-one basis.

F2 · balance_after: Total holdings include shares of Class A Common Stock received pursuant to a stock dividend paid on December 29, 2022.

F3 · balance_after: Total holdings include shares of Class A Common Stock acquired through the Issuer's Employee Stock Purchase Plan on April 14, 2022, October 18, 2022, May 28, 2023 and November 30, 2023.

SEC source: 0001104659-23-059947 · tm2315469-4_4seq1.xml · derivative · entry 1

Anderson Karli S. · CIK 0001577417 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 227,808

Underlying: Common Stock · 117,637 shares

Expires 2033-05-10

F1 · security: The Call Options vest on the earlier of Westwater Resources, Inc.'s next Annual General Meeting of Stockholders or May 10, 2024.

F1 · derivative.exercise_date: The Call Options vest on the earlier of Westwater Resources, Inc.'s next Annual General Meeting of Stockholders or May 10, 2024.

SEC source: 0001628280-23-005898 · wf-form4_167771051285247.xml · derivative · entry 7

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,818

Underlying: Class A Common Stock · 2,409 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Class A common stock of the Issuer ("Class A Common Stock"). The restricted stock units will be settled in either Class A Common Stock or cash (or a combination thereof) at the discretion of the Issuer's Human Capital and Compensation Committee.

F7 · derivative.exercise_date: These restricted stock units vest in three equal annual installments beginning on February 28, 2023.

F7 · derivative.expiration_date: These restricted stock units vest in three equal annual installments beginning on February 28, 2023.

SEC source: 0001628280-23-005898 · wf-form4_167771051285247.xml · derivative · entry 6

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,369

Underlying: Class A Common Stock · 2,369 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Class A common stock of the Issuer ("Class A Common Stock"). The restricted stock units will be settled in either Class A Common Stock or cash (or a combination thereof) at the discretion of the Issuer's Human Capital and Compensation Committee.

F6 · derivative.exercise_date: These restricted stock units vest in three equal annual installments beginning on February 28, 2022.

F6 · derivative.expiration_date: These restricted stock units vest in three equal annual installments beginning on February 28, 2022.

SEC source: 0001628280-23-005898 · wf-form4_167771051285247.xml · derivative · entry 5

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 2,201 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Class A common stock of the Issuer ("Class A Common Stock"). The restricted stock units will be settled in either Class A Common Stock or cash (or a combination thereof) at the discretion of the Issuer's Human Capital and Compensation Committee.

F5 · derivative.exercise_date: These restricted stock units vest in three equal annual installments beginning on February 28, 2021.

F5 · derivative.expiration_date: These restricted stock units vest in three equal annual installments beginning on February 28, 2021.

SEC source: 0001628280-23-005898 · wf-form4_167771051285247.xml · nonDerivative · entry 4

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,407

SEC source: 0001628280-23-005898 · wf-form4_167771051285247.xml · nonDerivative · entry 3

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,576

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Reflects restricted stock units that upon vesting converted into shares of Class A common stock of the Issuer ("Class A Common Stock") on a one-for-one basis.

SEC source: 0001628280-23-005898 · wf-form4_167771051285247.xml · nonDerivative · entry 2

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,167

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Reflects restricted stock units that upon vesting converted into shares of Class A common stock of the Issuer ("Class A Common Stock") on a one-for-one basis.

SEC source: 0001628280-23-005898 · wf-form4_167771051285247.xml · nonDerivative · entry 1

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,798

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Reflects restricted stock units that upon vesting converted into shares of Class A common stock of the Issuer ("Class A Common Stock") on a one-for-one basis.

F2 · balance_after: Total holdings include shares of Class A Common Stock received pursuant to a stock dividend paid on December 29, 2022.

F3 · balance_after: Total holdings include shares of Class A Common Stock acquired through the Issuer's Employee Stock Purchase Plan on April 14, 2022 and October 18, 2022.

SEC source: 0001628280-23-005101 · wf-form4_167728019966590.xml · derivative · entry 1

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,222

Underlying: Class A Common Stock · 9,222 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Class A common stock of the Issuer ("Class A Common Stock"). The restricted stock units will be settled in either Class A Common Stock or cash (or a combination thereof) at the discretion of the Issuer's Human Capital and Compensation Committee.

F2 · derivative.exercise_date: These restricted stock units vest in three equal annual installments beginning on February 28, 2024.

F2 · derivative.expiration_date: These restricted stock units vest in three equal annual installments beginning on February 28, 2024.

SEC source: 0001628280-22-024381 · wf-form4_166249719902770.xml · derivative · entry 3

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 1,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Class A Common Stock. The restricted stock units will be settled in either Class A Common Stock or cash (or a combination thereof) at the discretion of the Issuer's Human Capital and Compensation Committee.

F4 · derivative.exercise_date: On September 3, 2019, the Reporting Person was granted 3,000 restricted stock units that vest in three equal annual installments beginning on September 3, 2020.

F4 · derivative.expiration_date: On September 3, 2019, the Reporting Person was granted 3,000 restricted stock units that vest in three equal annual installments beginning on September 3, 2020.

SEC source: 0001628280-22-024381 · wf-form4_166249719902770.xml · nonDerivative · entry 2

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,162

SEC source: 0001628280-22-024381 · wf-form4_166249719902770.xml · nonDerivative · entry 1

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,601

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Reflects restricted stock units that upon vesting converted into shares of Class A common stock of the Issuer ("Class A Common Stock") on a one-for-one basis.

F2 · balance_after: Includes 365 shares acquired through the Issuer's Employee Stock Purchase Plan on 4/14/2022.

SEC source: 0001628280-22-019991 · wf-form4_165939309509434.xml · derivative · entry 3

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 5,710 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Class A Common Stock. The restricted stock units will be settled in either Class A Common Stock or cash (or a combination thereof) at the discretion of the Issuer's Human Capital and Compensation Committee.

F4 · derivative.exercise_date: The Reporting Person was granted 11,421 restricted stock units that vest in two equal installments beginning on July 30, 2021.

F4 · derivative.expiration_date: The Reporting Person was granted 11,421 restricted stock units that vest in two equal installments beginning on July 30, 2021.

SEC source: 0001628280-22-019991 · wf-form4_165939309509434.xml · nonDerivative · entry 2

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,601

SEC source: 0001628280-22-019991 · wf-form4_165939309509434.xml · nonDerivative · entry 1

Anderson Karli S. · CIK 0001577417 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,108

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Reflects restricted stock units that upon vesting converted into shares of Class A common stock of the Issuer ("Class A Common Stock") on a one-for-one basis.

F2 · balance_after: Includes 365 shares acquired through the Issuer's Employee Stock Purchase Plan on April 14, 2022.

SEC source: 0001104659-22-058916 · tm2215138-8_4seq1.xml · derivative · entry 1

Anderson Karli S. · CIK 0001577417 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 110,171

Underlying: Common Stock · 78,720 shares

Expires 2032-05-09

F1 · derivative.exercise_date: The Call Options vest on the earlier of Westwater Resources, Inc.'s next Annual General Meeting of Stockholders or May 9, 2023.