OKLO

SEC source: 0001104659-25-031161 · tm2511091-4_4seq1.xml · nonDerivative · entry 4

Cochran Caroline · CIK 0002021786 · Director · Co-Founder, COO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Jacob DeWitte

Disclosed balance after: 10,805,098

F2 · ownership.nature: Represents securities held by the Reporting Person's spouse.

SEC source: 0001104659-25-031161 · tm2511091-4_4seq1.xml · nonDerivative · entry 3

Cochran Caroline · CIK 0002021786 · Director · Co-Founder, COO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Jacob DeWitte

Disclosed balance after: 10,834,106

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: Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock. On March 13, 2025, 56,180 and 39,326 restricted stock units were released to Mr. DeWitte and Ms. Cochran, respectively.

F2 · ownership.nature: Represents securities held by the Reporting Person's spouse.

SEC source: 0001104659-25-031161 · tm2511091-4_4seq1.xml · nonDerivative · entry 2

Cochran Caroline · CIK 0002021786 · Director · Co-Founder, COO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,502,108

SEC source: 0001104659-25-031161 · tm2511091-4_4seq1.xml · nonDerivative · entry 1

Cochran Caroline · CIK 0002021786 · Director · Co-Founder, COO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,522,411

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: Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock. On March 13, 2025, 56,180 and 39,326 restricted stock units were released to Mr. DeWitte and Ms. Cochran, respectively.

SEC source: 0001104659-25-031154 · tm2511091-2_4seq1.xml · derivative · entry 8

DeWitte Jacob · CIK 0002021433 · Director · Co-Founder, CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Caroline Cochran

Disclosed balance after: 196,629

Underlying: Class A Common Stock · 39,326 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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock. On March 13, 2025, 56,180 and 39,326 restricted stock units were released to Mr. DeWitte and Ms. Cochran, respectively.

F3 · derivative.exercise_date: The restricted stock units vest in 12 substantially equal quarterly installments beginning on August 9, 2024.

F3 · derivative.expiration_date: The restricted stock units vest in 12 substantially equal quarterly installments beginning on August 9, 2024.

F2 · ownership.nature: Represents securities held by the Reporting Person's spouse.

SEC source: 0001104659-25-031154 · tm2511091-2_4seq1.xml · derivative · entry 7

DeWitte Jacob · CIK 0002021433 · Director · Co-Founder, CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 280,899

Underlying: Class A Common Stock · 56,180 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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock. On March 13, 2025, 56,180 and 39,326 restricted stock units were released to Mr. DeWitte and Ms. Cochran, respectively.

F3 · derivative.exercise_date: The restricted stock units vest in 12 substantially equal quarterly installments beginning on August 9, 2024.

F3 · derivative.expiration_date: The restricted stock units vest in 12 substantially equal quarterly installments beginning on August 9, 2024.

SEC source: 0001104659-25-031154 · tm2511091-2_4seq1.xml · nonDerivative · entry 4

DeWitte Jacob · CIK 0002021433 · Director · Co-Founder, CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Caroline Cochran

Disclosed balance after: 10,502,108

F2 · ownership.nature: Represents securities held by the Reporting Person's spouse.

SEC source: 0001104659-25-031154 · tm2511091-2_4seq1.xml · nonDerivative · entry 3

DeWitte Jacob · CIK 0002021433 · Director · Co-Founder, CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Caroline Cochran

Disclosed balance after: 10,522,411

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: Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock. On March 13, 2025, 56,180 and 39,326 restricted stock units were released to Mr. DeWitte and Ms. Cochran, respectively.

F2 · ownership.nature: Represents securities held by the Reporting Person's spouse.

SEC source: 0001104659-25-031154 · tm2511091-2_4seq1.xml · nonDerivative · entry 2

DeWitte Jacob · CIK 0002021433 · Director · Co-Founder, CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,805,098

SEC source: 0001104659-25-031154 · tm2511091-2_4seq1.xml · nonDerivative · entry 1

DeWitte Jacob · CIK 0002021433 · Director · Co-Founder, CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,834,106

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: Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock. On March 13, 2025, 56,180 and 39,326 restricted stock units were released to Mr. DeWitte and Ms. Cochran, respectively.

SEC source: 0001104659-25-031158 · tm2511091-3_4seq1.xml · derivative · entry 3

Bealmear Richard Craig · CIK 0001855623 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 196,629

Underlying: Class A Common Stock · 39,326 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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock. On March 13, 2025, 39,326 restricted stock units were released to the Reporting Person.

F2 · derivative.exercise_date: The restricted stock units vest in 12 substantially equal quarterly installments beginning on August 9, 2024.

F2 · derivative.expiration_date: The restricted stock units vest in 12 substantially equal quarterly installments beginning on August 9, 2024.

SEC source: 0001104659-25-031158 · tm2511091-3_4seq1.xml · nonDerivative · entry 2

Bealmear Richard Craig · CIK 0001855623 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,913

SEC source: 0001104659-25-031158 · tm2511091-3_4seq1.xml · nonDerivative · entry 1

Bealmear Richard Craig · CIK 0001855623 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,326

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: Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock. On March 13, 2025, 39,326 restricted stock units were released to the Reporting Person.

SEC source: 0001104659-25-021824 · tm258595-2_4seq1.xml · derivative · entry 1

PONEMAN DANIEL B · CIK 0001636063 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,446

Underlying: Class A Common Stock · 3,446 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock.

F2 · derivative.exercise_date: The restricted stock units vest in full on March 6, 2026.

F2 · derivative.expiration_date: The restricted stock units vest in full on March 6, 2026.

SEC source: 0001104659-25-021421 · tm258525-2_4seq1.xml · derivative · entry 1

Thompson Michael N. Jr. · CIK 0001824755 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,446

Underlying: Class A Common Stock · 3,446 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock.

F2 · derivative.exercise_date: The restricted stock units vest in full on March 4, 2026.

F2 · derivative.expiration_date: The restricted stock units vest in full on March 4, 2026.

SEC source: 0001104659-25-010963 · tm255920-1_4seq1.xml · derivative · entry 1

Bealmear Richard Craig · CIK 0001855623 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 80,000

Underlying: Class A Common Stock · 80,000 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock.

F2 · derivative.exercise_date: The restricted stock units vest in full on November 29, 2025.

F2 · derivative.expiration_date: The restricted stock units vest in full on November 29, 2025.

SEC source: 0001104659-24-132878 · tm2432344-2_4seq1.xml · nonDerivative · entry 2

Cochran Caroline · CIK 0002021786 · Director · Co-Founder, COO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Jacob DeWitte

Disclosed balance after: 13,068,926

F1 · ownership.nature: Represents securities held by the Reporting Person's spouse.

SEC source: 0001104659-24-132878 · tm2432344-2_4seq1.xml · nonDerivative · entry 1

Cochran Caroline · CIK 0002021786 · Director · Co-Founder, COO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,508,085

SEC source: 0001104659-24-132874 · tm2432344-1_4seq1.xml · nonDerivative · entry 2

DeWitte Jacob · CIK 0002021433 · Director · Co-Founder, CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Caroline Cochran

Disclosed balance after: 12,508,085

F1 · ownership.nature: Represents securities held by the Reporting Person's spouse.

SEC source: 0001104659-24-132874 · tm2432344-1_4seq1.xml · nonDerivative · entry 1

DeWitte Jacob · CIK 0002021433 · Director · Co-Founder, CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,068,926

SEC source: 0001104659-24-132159 · tm2432062-1_4seq1.xml · nonDerivative · entry 1

Kinzley Richard · CIK 0001445637 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,000

SEC source: 0001104659-24-131323 · tm2431816-1_4seq1.xml · nonDerivative · entry 2

Cochran Caroline · CIK 0002021786 · Director · Co-Founder, COO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,543,085

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.4404 to $21.7508, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

SEC source: 0001104659-24-131323 · tm2431816-1_4seq1.xml · nonDerivative · entry 1

Cochran Caroline · CIK 0002021786 · Director · Co-Founder, COO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,771,333

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.075 to $20.3662, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

SEC source: 0001104659-24-131328 · tm2431816-2_4seq1.xml · nonDerivative · entry 2

DeWitte Jacob · CIK 0002021433 · Director · Co-Founder, CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Caroline Cochran

Disclosed balance after: 12,543,085

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.4404 to $21.7508, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

F3 · ownership.nature: Represents securities held by the Reporting Person's spouse.

SEC source: 0001104659-24-131328 · tm2431816-2_4seq1.xml · nonDerivative · entry 1

DeWitte Jacob · CIK 0002021433 · Director · Co-Founder, CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Caroline Cochran

Disclosed balance after: 12,771,333

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.075 to $20.3662, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

F3 · ownership.nature: Represents securities held by the Reporting Person's spouse.

SEC source: 0001104659-24-121561 · tm2429081-3_4seq1.xml · derivative · entry 4

Cochran Caroline · CIK 0002021786 · Director · Co-Founder, COO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Jacob DeWitte

Disclosed balance after: 0

Underlying: Class A Common Stock · 1,913,474 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.

F1 · derivative.exercise_price: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement. The amount of Earnout Shares reported herein excludes 150,000 Earnout Shares that the Reporting Person forfeitted for no consideration.

F1 · price: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement. The amount of Earnout Shares reported herein excludes 150,000 Earnout Shares that the Reporting Person forfeitted for no consideration.

F1 · derivative.exercise_date: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement. The amount of Earnout Shares reported herein excludes 150,000 Earnout Shares that the Reporting Person forfeitted for no consideration.

F1 · derivative.expiration_date: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement. The amount of Earnout Shares reported herein excludes 150,000 Earnout Shares that the Reporting Person forfeitted for no consideration.

F2 · ownership.nature: Represents securities held by the Reporting Person's spouse.

SEC source: 0001104659-24-121561 · tm2429081-3_4seq1.xml · derivative · entry 3

Cochran Caroline · CIK 0002021786 · Director · Co-Founder, COO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 1,862,054 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.

F1 · derivative.exercise_price: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement. The amount of Earnout Shares reported herein excludes 150,000 Earnout Shares that the Reporting Person forfeitted for no consideration.

F1 · price: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement. The amount of Earnout Shares reported herein excludes 150,000 Earnout Shares that the Reporting Person forfeitted for no consideration.

F1 · derivative.exercise_date: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement. The amount of Earnout Shares reported herein excludes 150,000 Earnout Shares that the Reporting Person forfeitted for no consideration.

F1 · derivative.expiration_date: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement. The amount of Earnout Shares reported herein excludes 150,000 Earnout Shares that the Reporting Person forfeitted for no consideration.

SEC source: 0001104659-24-121561 · tm2429081-3_4seq1.xml · nonDerivative · entry 2

Cochran Caroline · CIK 0002021786 · Director · Co-Founder, COO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Jacob DeWitte

Disclosed balance after: 13,103,926

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: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement. The amount of Earnout Shares reported herein excludes 150,000 Earnout Shares that the Reporting Person forfeitted for no consideration.

F2 · ownership.nature: Represents securities held by the Reporting Person's spouse.

SEC source: 0001104659-24-121561 · tm2429081-3_4seq1.xml · nonDerivative · entry 1

Cochran Caroline · CIK 0002021786 · Director · Co-Founder, COO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,773,654

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: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement. The amount of Earnout Shares reported herein excludes 150,000 Earnout Shares that the Reporting Person forfeitted for no consideration.

SEC source: 0001104659-24-121565 · tm2429081-4_4seq1.xml · derivative · entry 4

DeWitte Jacob · CIK 0002021433 · Director · Co-Founder, CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Caroline Cochran

Disclosed balance after: 0

Underlying: Class A Common Stock · 1,862,054 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.

F1 · derivative.exercise_price: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement. The amount of Earnout Shares reported herein excludes 150,000 Earnout Shares that the Reporting Person forfeitted for no consideration.

F1 · price: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement. The amount of Earnout Shares reported herein excludes 150,000 Earnout Shares that the Reporting Person forfeitted for no consideration.

F1 · derivative.exercise_date: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement. The amount of Earnout Shares reported herein excludes 150,000 Earnout Shares that the Reporting Person forfeitted for no consideration.

F1 · derivative.expiration_date: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement. The amount of Earnout Shares reported herein excludes 150,000 Earnout Shares that the Reporting Person forfeitted for no consideration.

F2 · ownership.nature: Represents securities held by the Reporting Person's spouse.

SEC source: 0001104659-24-121565 · tm2429081-4_4seq1.xml · derivative · entry 3

DeWitte Jacob · CIK 0002021433 · Director · Co-Founder, CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 1,913,474 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.

F1 · derivative.exercise_price: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement. The amount of Earnout Shares reported herein excludes 150,000 Earnout Shares that the Reporting Person forfeitted for no consideration.

F1 · price: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement. The amount of Earnout Shares reported herein excludes 150,000 Earnout Shares that the Reporting Person forfeitted for no consideration.

F1 · derivative.exercise_date: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement. The amount of Earnout Shares reported herein excludes 150,000 Earnout Shares that the Reporting Person forfeitted for no consideration.

F1 · derivative.expiration_date: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement. The amount of Earnout Shares reported herein excludes 150,000 Earnout Shares that the Reporting Person forfeitted for no consideration.

SEC source: 0001104659-24-121565 · tm2429081-4_4seq1.xml · nonDerivative · entry 2

DeWitte Jacob · CIK 0002021433 · Director · Co-Founder, CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Caroline Cochran

Disclosed balance after: 12,773,654

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: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement. The amount of Earnout Shares reported herein excludes 150,000 Earnout Shares that the Reporting Person forfeitted for no consideration.

F2 · ownership.nature: Represents securities held by the Reporting Person's spouse.

SEC source: 0001104659-24-121565 · tm2429081-4_4seq1.xml · nonDerivative · entry 1

DeWitte Jacob · CIK 0002021433 · Director · Co-Founder, CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,103,926

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: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement. The amount of Earnout Shares reported herein excludes 150,000 Earnout Shares that the Reporting Person forfeitted for no consideration.

SEC source: 0001104659-24-121560 · tm2429081-2_4seq1.xml · derivative · entry 2

Altman Samuel H. · CIK 0001571705 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Hydrazine Capital II, L.P.

Disclosed balance after: 0

Underlying: Class A Common Stock · 581,100 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.

F1 · derivative.exercise_price: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement.

F1 · price: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement.

F1 · derivative.exercise_date: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement.

F1 · derivative.expiration_date: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement.

F2 · ownership.nature: The Reporting Person has sole voting and investment power over the shares held by Hydrazine Capital II, L.P. and therefore may be deemed to share beneficial ownership over such shares.

SEC source: 0001104659-24-121560 · tm2429081-2_4seq1.xml · nonDerivative · entry 1

Altman Samuel H. · CIK 0001571705 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Hydrazine Capital II, L.P.

Disclosed balance after: 3,732,479

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: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. On November 19, 2024, the Earnout Shares were converted into Class A Common Stock of the Issuer following the achievement of the Issuer's price thresholds as disclosed in the Merger Agreement.

F2 · ownership.nature: The Reporting Person has sole voting and investment power over the shares held by Hydrazine Capital II, L.P. and therefore may be deemed to share beneficial ownership over such shares.

SEC source: 0001104659-24-120191 · tm2428710-1_4seq1.xml · nonDerivative · entry 1

Klein Michael Stuart · CIK 0001327392 · Director · 10% owner

M. Klein Associates, Inc. · CIK 0001751504 · Director · 10% owner

AltC Sponsor LLC · CIK 0001849019 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 500,000

F1 · kind: Represents pro rata distribution by AltC Sponsor LLC (the "Sponsor") to its members (the "Distribution") following the business combination of AltC Acquisition Corp. with Oklo Inc., which closed on May 9, 2024. No consideration was paid in connection with the transaction reported herein.

F1 · price: Represents pro rata distribution by AltC Sponsor LLC (the "Sponsor") to its members (the "Distribution") following the business combination of AltC Acquisition Corp. with Oklo Inc., which closed on May 9, 2024. No consideration was paid in connection with the transaction reported herein.

F2 · balance_after: 212,920 of the shares reported (the "Shares") are held of record by M. Klein Associates, Inc. and 287,100 of the Shares are held of record by Allies Capital Corp., each of which received the Shares in the Distribution. Michael Klein is the controlling stockholder of M. Klein Associates, Inc., which is the managing member of the Sponsor. Michael Klein is the sole stockholder of Allies Capital Corp.

F2 · ownership.nature: 212,920 of the shares reported (the "Shares") are held of record by M. Klein Associates, Inc. and 287,100 of the Shares are held of record by Allies Capital Corp., each of which received the Shares in the Distribution. Michael Klein is the controlling stockholder of M. Klein Associates, Inc., which is the managing member of the Sponsor. Michael Klein is the sole stockholder of Allies Capital Corp.

SEC source: 0001104659-24-079565 · tm2419306-4_4seq1.xml · derivative · entry 1

Jansen John M · CIK 0002021774 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,854

Underlying: Class A Common Stock · 16,854 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock.

F2 · derivative.exercise_date: The restricted stock units vest in full on May 9, 2025.

F2 · derivative.expiration_date: The restricted stock units vest in full on May 9, 2025.

SEC source: 0001104659-24-079561 · tm2419306-2_4seq1.xml · derivative · entry 2

Cochran Caroline · CIK 0002021786 · Director · Co-Founder, COO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Jacob DeWitte

Disclosed balance after: 337,079

Underlying: Class A Common Stock · 337,079 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock.

F2 · derivative.exercise_date: The restricted stock units vest in 12 substantially equal quarterly installments beginning on August 9, 2024.

F2 · derivative.expiration_date: The restricted stock units vest in 12 substantially equal quarterly installments beginning on August 9, 2024.

F3 · balance_after: Represents securities held by the Reporting Person's spouse.

SEC source: 0001104659-24-079561 · tm2419306-2_4seq1.xml · derivative · entry 1

Cochran Caroline · CIK 0002021786 · Director · Co-Founder, COO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 235,955

Underlying: Class A Common Stock · 235,955 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock.

F2 · derivative.exercise_date: The restricted stock units vest in 12 substantially equal quarterly installments beginning on August 9, 2024.

F2 · derivative.expiration_date: The restricted stock units vest in 12 substantially equal quarterly installments beginning on August 9, 2024.

SEC source: 0001104659-24-079563 · tm2419306-3_4seq1.xml · derivative · entry 2

DeWitte Jacob · CIK 0002021433 · Director · Co-Founder, CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Caroline Cochran

Disclosed balance after: 235,955

Underlying: Class A Common Stock · 235,955 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock.

F2 · derivative.exercise_date: The restricted stock units vest in 12 substantially equal quarterly installments beginning on August 9, 2024.

F2 · derivative.expiration_date: The restricted stock units vest in 12 substantially equal quarterly installments beginning on August 9, 2024.

F3 · balance_after: Represents securities held by the Reporting Person's spouse.

SEC source: 0001104659-24-079563 · tm2419306-3_4seq1.xml · derivative · entry 1

DeWitte Jacob · CIK 0002021433 · Director · Co-Founder, CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 337,079

Underlying: Class A Common Stock · 337,079 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock.

F2 · derivative.exercise_date: The restricted stock units vest in 12 substantially equal quarterly installments beginning on August 9, 2024.

F2 · derivative.expiration_date: The restricted stock units vest in 12 substantially equal quarterly installments beginning on August 9, 2024.

SEC source: 0001104659-24-079556 · tm2419306-1_4seq1.xml · derivative · entry 1

Bealmear Richard Craig · CIK 0001855623 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 235,955

Underlying: Class A Common Stock · 235,955 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock.

F2 · derivative.exercise_date: The restricted stock units vest in 12 substantially equal quarterly installments beginning on August 9, 2024.

F2 · derivative.expiration_date: The restricted stock units vest in 12 substantially equal quarterly installments beginning on August 9, 2024.

SEC source: 0001104659-24-079566 · tm2419306-5_4seq1.xml · derivative · entry 1

Kinzley Richard · CIK 0001445637 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,854

Underlying: Class A Common Stock · 16,854 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock.

F2 · derivative.exercise_date: The restricted stock units vest in full on May 9, 2025.

F2 · derivative.expiration_date: The restricted stock units vest in full on May 9, 2025.

SEC source: 0001104659-24-079567 · tm2419306-6_4seq1.xml · derivative · entry 1

Wright Christopher A · CIK 0001292100 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,854

Underlying: Class A Common Stock · 16,854 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock.

F2 · derivative.exercise_date: The restricted stock units vest in full on May 9, 2025.

F2 · derivative.expiration_date: The restricted stock units vest in full on May 9, 2025.

SEC source: 0001104659-24-060611 · tm2414121-10_4seq1.xml · derivative · entry 4

Cochran Caroline · CIK 0002021786 · Director · Co-Founder, COO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Jacob DeWitte

Disclosed balance after: 2,063,583

Underlying: Class A Common Stock · 2,063,583 shares

Expires not disclosed

F3 · derivative.exercise_price: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. Pursuant to an "earnout" provision in the Merger Agreement, the Earnout Shares may be issued in three separate tranches based upon (A) the closing sale price of one share of the Issuer's Class A Common Stock for any twenty trading days within any sixty consecutive trading day period within the five-year period following the closing of the Issuer's business combination or (B) if the Issuer undergoes a Change in Control (as defined in the Merger Agreement), the price per share received by stockholders of the Issuer in such Change in Control transaction.

F1 · kind: Represents securities received as part of the Issuer's business combination, in connection with that certain Agreement and Plan of Merger and Reorganization, dated as of July 11, 2023 (the "Merger Agreement"), by and between the Issuer (formerly AltC Acquisition Corp.), AltC Merger Sub, Inc., and Oklo Inc. ("Legacy Oklo") pursuant to which shares of common stock of Legacy Oklo automatically converted into the right to receive (i) cash and Class A Common Stock of the Issuer and (ii) the right to receive Earnout Shares (as defined below).

F1 · price: Represents securities received as part of the Issuer's business combination, in connection with that certain Agreement and Plan of Merger and Reorganization, dated as of July 11, 2023 (the "Merger Agreement"), by and between the Issuer (formerly AltC Acquisition Corp.), AltC Merger Sub, Inc., and Oklo Inc. ("Legacy Oklo") pursuant to which shares of common stock of Legacy Oklo automatically converted into the right to receive (i) cash and Class A Common Stock of the Issuer and (ii) the right to receive Earnout Shares (as defined below).

F3 · derivative.exercise_date: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. Pursuant to an "earnout" provision in the Merger Agreement, the Earnout Shares may be issued in three separate tranches based upon (A) the closing sale price of one share of the Issuer's Class A Common Stock for any twenty trading days within any sixty consecutive trading day period within the five-year period following the closing of the Issuer's business combination or (B) if the Issuer undergoes a Change in Control (as defined in the Merger Agreement), the price per share received by stockholders of the Issuer in such Change in Control transaction.

F3 · derivative.expiration_date: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. Pursuant to an "earnout" provision in the Merger Agreement, the Earnout Shares may be issued in three separate tranches based upon (A) the closing sale price of one share of the Issuer's Class A Common Stock for any twenty trading days within any sixty consecutive trading day period within the five-year period following the closing of the Issuer's business combination or (B) if the Issuer undergoes a Change in Control (as defined in the Merger Agreement), the price per share received by stockholders of the Issuer in such Change in Control transaction.

F2 · ownership.nature: Represents securities held by the Reporting Person's spouse.

SEC source: 0001104659-24-060611 · tm2414121-10_4seq1.xml · derivative · entry 3

Cochran Caroline · CIK 0002021786 · Director · Co-Founder, COO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,012,162

Underlying: Class A Common Stock · 2,012,162 shares

Expires not disclosed

F3 · derivative.exercise_price: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. Pursuant to an "earnout" provision in the Merger Agreement, the Earnout Shares may be issued in three separate tranches based upon (A) the closing sale price of one share of the Issuer's Class A Common Stock for any twenty trading days within any sixty consecutive trading day period within the five-year period following the closing of the Issuer's business combination or (B) if the Issuer undergoes a Change in Control (as defined in the Merger Agreement), the price per share received by stockholders of the Issuer in such Change in Control transaction.

F1 · kind: Represents securities received as part of the Issuer's business combination, in connection with that certain Agreement and Plan of Merger and Reorganization, dated as of July 11, 2023 (the "Merger Agreement"), by and between the Issuer (formerly AltC Acquisition Corp.), AltC Merger Sub, Inc., and Oklo Inc. ("Legacy Oklo") pursuant to which shares of common stock of Legacy Oklo automatically converted into the right to receive (i) cash and Class A Common Stock of the Issuer and (ii) the right to receive Earnout Shares (as defined below).

F1 · price: Represents securities received as part of the Issuer's business combination, in connection with that certain Agreement and Plan of Merger and Reorganization, dated as of July 11, 2023 (the "Merger Agreement"), by and between the Issuer (formerly AltC Acquisition Corp.), AltC Merger Sub, Inc., and Oklo Inc. ("Legacy Oklo") pursuant to which shares of common stock of Legacy Oklo automatically converted into the right to receive (i) cash and Class A Common Stock of the Issuer and (ii) the right to receive Earnout Shares (as defined below).

F3 · derivative.exercise_date: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. Pursuant to an "earnout" provision in the Merger Agreement, the Earnout Shares may be issued in three separate tranches based upon (A) the closing sale price of one share of the Issuer's Class A Common Stock for any twenty trading days within any sixty consecutive trading day period within the five-year period following the closing of the Issuer's business combination or (B) if the Issuer undergoes a Change in Control (as defined in the Merger Agreement), the price per share received by stockholders of the Issuer in such Change in Control transaction.

F3 · derivative.expiration_date: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. Pursuant to an "earnout" provision in the Merger Agreement, the Earnout Shares may be issued in three separate tranches based upon (A) the closing sale price of one share of the Issuer's Class A Common Stock for any twenty trading days within any sixty consecutive trading day period within the five-year period following the closing of the Issuer's business combination or (B) if the Issuer undergoes a Change in Control (as defined in the Merger Agreement), the price per share received by stockholders of the Issuer in such Change in Control transaction.

SEC source: 0001104659-24-060611 · tm2414121-10_4seq1.xml · nonDerivative · entry 2

Cochran Caroline · CIK 0002021786 · Director · Co-Founder, COO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Jacob DeWitte

Disclosed balance after: 11,190,452

F1 · kind: Represents securities received as part of the Issuer's business combination, in connection with that certain Agreement and Plan of Merger and Reorganization, dated as of July 11, 2023 (the "Merger Agreement"), by and between the Issuer (formerly AltC Acquisition Corp.), AltC Merger Sub, Inc., and Oklo Inc. ("Legacy Oklo") pursuant to which shares of common stock of Legacy Oklo automatically converted into the right to receive (i) cash and Class A Common Stock of the Issuer and (ii) the right to receive Earnout Shares (as defined below).

F1 · price: Represents securities received as part of the Issuer's business combination, in connection with that certain Agreement and Plan of Merger and Reorganization, dated as of July 11, 2023 (the "Merger Agreement"), by and between the Issuer (formerly AltC Acquisition Corp.), AltC Merger Sub, Inc., and Oklo Inc. ("Legacy Oklo") pursuant to which shares of common stock of Legacy Oklo automatically converted into the right to receive (i) cash and Class A Common Stock of the Issuer and (ii) the right to receive Earnout Shares (as defined below).

F2 · ownership.nature: Represents securities held by the Reporting Person's spouse.

SEC source: 0001104659-24-060611 · tm2414121-10_4seq1.xml · nonDerivative · entry 1

Cochran Caroline · CIK 0002021786 · Director · Co-Founder, COO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,911,600

F1 · kind: Represents securities received as part of the Issuer's business combination, in connection with that certain Agreement and Plan of Merger and Reorganization, dated as of July 11, 2023 (the "Merger Agreement"), by and between the Issuer (formerly AltC Acquisition Corp.), AltC Merger Sub, Inc., and Oklo Inc. ("Legacy Oklo") pursuant to which shares of common stock of Legacy Oklo automatically converted into the right to receive (i) cash and Class A Common Stock of the Issuer and (ii) the right to receive Earnout Shares (as defined below).

F1 · price: Represents securities received as part of the Issuer's business combination, in connection with that certain Agreement and Plan of Merger and Reorganization, dated as of July 11, 2023 (the "Merger Agreement"), by and between the Issuer (formerly AltC Acquisition Corp.), AltC Merger Sub, Inc., and Oklo Inc. ("Legacy Oklo") pursuant to which shares of common stock of Legacy Oklo automatically converted into the right to receive (i) cash and Class A Common Stock of the Issuer and (ii) the right to receive Earnout Shares (as defined below).

SEC source: 0001104659-24-060615 · tm2414121-11_4seq1.xml · derivative · entry 4

DeWitte Jacob · CIK 0002021433 · Director · Co-Founder, CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Caroline Cochran

Disclosed balance after: 2,012,162

Underlying: Class A Common Stock · 2,012,162 shares

Expires not disclosed

F3 · derivative.exercise_price: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. Pursuant to an "earnout" provision in the Merger Agreement, the Earnout Shares may be issued in three separate tranches based upon (A) the closing sale price of one share of the Issuer's Class A Common Stock for any twenty trading days within any sixty consecutive trading day period within the five-year period following the closing of the Issuer's business combination or (B) if the Issuer undergoes a Change in Control (as defined in the Merger Agreement), the price per share received by stockholders of the Issuer in such Change in Control transaction.

F1 · kind: Represents securities received as part of the Issuer's business combination, in connection with that certain Agreement and Plan of Merger and Reorganization, dated as of July 11, 2023 (the "Merger Agreement"), by and between the Issuer (formerly AltC Acquisition Corp.), AltC Merger Sub, Inc., and Oklo Inc. ("Legacy Oklo") pursuant to which shares of common stock of Legacy Oklo automatically converted into the right to receive (i) cash and Class A Common Stock of the Issuer and (ii) the right to receive Earnout Shares (as defined below).

F1 · price: Represents securities received as part of the Issuer's business combination, in connection with that certain Agreement and Plan of Merger and Reorganization, dated as of July 11, 2023 (the "Merger Agreement"), by and between the Issuer (formerly AltC Acquisition Corp.), AltC Merger Sub, Inc., and Oklo Inc. ("Legacy Oklo") pursuant to which shares of common stock of Legacy Oklo automatically converted into the right to receive (i) cash and Class A Common Stock of the Issuer and (ii) the right to receive Earnout Shares (as defined below).

F3 · derivative.exercise_date: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. Pursuant to an "earnout" provision in the Merger Agreement, the Earnout Shares may be issued in three separate tranches based upon (A) the closing sale price of one share of the Issuer's Class A Common Stock for any twenty trading days within any sixty consecutive trading day period within the five-year period following the closing of the Issuer's business combination or (B) if the Issuer undergoes a Change in Control (as defined in the Merger Agreement), the price per share received by stockholders of the Issuer in such Change in Control transaction.

F3 · derivative.expiration_date: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. Pursuant to an "earnout" provision in the Merger Agreement, the Earnout Shares may be issued in three separate tranches based upon (A) the closing sale price of one share of the Issuer's Class A Common Stock for any twenty trading days within any sixty consecutive trading day period within the five-year period following the closing of the Issuer's business combination or (B) if the Issuer undergoes a Change in Control (as defined in the Merger Agreement), the price per share received by stockholders of the Issuer in such Change in Control transaction.

F2 · ownership.nature: Represents securities held by the Reporting Person's spouse.

SEC source: 0001104659-24-060615 · tm2414121-11_4seq1.xml · derivative · entry 3

DeWitte Jacob · CIK 0002021433 · Director · Co-Founder, CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,063,583

Underlying: Class A Common Stock · 2,063,583 shares

Expires not disclosed

F3 · derivative.exercise_price: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. Pursuant to an "earnout" provision in the Merger Agreement, the Earnout Shares may be issued in three separate tranches based upon (A) the closing sale price of one share of the Issuer's Class A Common Stock for any twenty trading days within any sixty consecutive trading day period within the five-year period following the closing of the Issuer's business combination or (B) if the Issuer undergoes a Change in Control (as defined in the Merger Agreement), the price per share received by stockholders of the Issuer in such Change in Control transaction.

F1 · kind: Represents securities received as part of the Issuer's business combination, in connection with that certain Agreement and Plan of Merger and Reorganization, dated as of July 11, 2023 (the "Merger Agreement"), by and between the Issuer (formerly AltC Acquisition Corp.), AltC Merger Sub, Inc., and Oklo Inc. ("Legacy Oklo") pursuant to which shares of common stock of Legacy Oklo automatically converted into the right to receive (i) cash and Class A Common Stock of the Issuer and (ii) the right to receive Earnout Shares (as defined below).

F1 · price: Represents securities received as part of the Issuer's business combination, in connection with that certain Agreement and Plan of Merger and Reorganization, dated as of July 11, 2023 (the "Merger Agreement"), by and between the Issuer (formerly AltC Acquisition Corp.), AltC Merger Sub, Inc., and Oklo Inc. ("Legacy Oklo") pursuant to which shares of common stock of Legacy Oklo automatically converted into the right to receive (i) cash and Class A Common Stock of the Issuer and (ii) the right to receive Earnout Shares (as defined below).

F3 · derivative.exercise_date: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. Pursuant to an "earnout" provision in the Merger Agreement, the Earnout Shares may be issued in three separate tranches based upon (A) the closing sale price of one share of the Issuer's Class A Common Stock for any twenty trading days within any sixty consecutive trading day period within the five-year period following the closing of the Issuer's business combination or (B) if the Issuer undergoes a Change in Control (as defined in the Merger Agreement), the price per share received by stockholders of the Issuer in such Change in Control transaction.

F3 · derivative.expiration_date: Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. Pursuant to an "earnout" provision in the Merger Agreement, the Earnout Shares may be issued in three separate tranches based upon (A) the closing sale price of one share of the Issuer's Class A Common Stock for any twenty trading days within any sixty consecutive trading day period within the five-year period following the closing of the Issuer's business combination or (B) if the Issuer undergoes a Change in Control (as defined in the Merger Agreement), the price per share received by stockholders of the Issuer in such Change in Control transaction.