Oklo 4: DeWitte Jacob sold 7,851,901 shares of Class A Common Stock… (Dec 29, 2025)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2025-12-24 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: Oklo Inc. (OKLO) CIK: 0001849056 --- Reporting Owner --- Name: DeWitte Jacob CIK: 0002021433 Role: Director, Officer (Co-Founder, CEO), 10%+ Owner --- Non-Derivative Transactions --- [Transaction #1] Security: Class A Common Stock Date: 2025-12-24 | Code: G (Gift) Shares: -7,851,901 | Price: $0.00 Shares Owned After: 928,197 | Ownership: D (Direct) Footnotes: [F1] Excludes 1,000,000 shares previously owned directly which were contributed to a grantor retained annuity trust on December 24, 2025. [F2] On December 24, 2025, the Reporting Person transferred 7,851,901 shares to the Jacob DeWitte Family Trust for no consideration. The Reporting Person is trustee of the trust. The Reporting Person, members of his family and certain charitable organizations are the beneficiaries of the trust. The Reporting Person remains the beneficial owner of the securities held by the trust. [Transaction #2] Security: Class A Common Stock Date: 2025-12-24 | Code: G (Gift) Shares: -7,583,085 | Price: $0.00 Shares Owned After: 919,023 | Ownership: I (Indirect) | Nature: By Caroline Cochran Footnotes: [F5] Excludes 1,000,000 shares previously owned by the Reporting Person's spouse which were contributed to a grantor retained annuity trust on December 24, 2025. [F6] On December 24, 2025, spouse of the Reporting Person transferred 7,583,085 shares to the Caroline DeWitte Family Trust for no consideration. Spouse of the Reporting Person is trustee of the trust. Spouse of the Reporting Person, members of her family and certain charitable organizations are the beneficiaries of the trust. Spouse of the Reporting Person remains the beneficial owner of the securities held by the trust. [F7] Represents securities held by the Reporting Person's spouse. --- Holdings --- [Holding #1] Security: Class A Common Stock Ownership: I (Indirect) Footnotes: [F2] On December 24, 2025, the Reporting Person transferred 7,851,901 shares to the Jacob DeWitte Family Trust for no consideration. The Reporting Person is trustee of the trust. The Reporting Person, members of his family and certain charitable organizations are the beneficiaries of the trust. The Reporting Person remains the beneficial owner of the securities held by the trust. [Holding #2] Security: Class A Common Stock Ownership: I (Indirect) Footnotes: [F3] These shares were previously reported as directly beneficially owned but were contributed to a grantor retained annuity trust on December 24, 2025. [Holding #3] Security: Class A Common Stock Ownership: I (Indirect) [Holding #4] Security: Class A Common Stock Ownership: I (Indirect) Footnotes: [F4] Represents securities beneficially owned by the Reporting Person's spouse. [Holding #5] Security: Class A Common Stock Ownership: I (Indirect) Footnotes: [F6] On December 24, 2025, spouse of the Reporting Person transferred 7,583,085 shares to the Caroline DeWitte Family Trust for no consideration. Spouse of the Reporting Person is trustee of the trust. Spouse of the Reporting Person, members of her family and certain charitable organizations are the beneficiaries of the trust. Spouse of the Reporting Person remains the beneficial owner of the securities held by the trust. [F4] Represents securities beneficially owned by the Reporting Person's spouse. [Holding #6] Security: Class A Common Stock Ownership: I (Indirect) Footnotes: [F8] These shares were previously reported as beneficially owned by the Reporting Person's spouse but were contributed to a grantor retained annuity trust on December 24, 2025. [F4] Represents securities beneficially owned by the Reporting Person's spouse. --- Footnotes (Complete Index) --- F1: Excludes 1,000,000 shares previously owned directly which were contributed to a grantor retained annuity trust on December 24, 2025. F2: On December 24, 2025, the Reporting Person transferred 7,851,901 shares to the Jacob DeWitte Family Trust for no consideration. The Reporting Person is trustee of the trust. The Reporting Person, members of his family and certain charitable organizations are the beneficiaries of the trust. The Reporting Person remains the beneficial owner of the securities held by the trust. F3: These shares were previously reported as directly beneficially owned but were contributed to a grantor retained annuity trust on December 24, 2025. F4: Represents securities beneficially owned by the Reporting Person's spouse. F5: Excludes 1,000,000 shares previously owned by the Reporting Person's spouse which were contributed to a grantor retained annuity trust on December 24, 2025. F6: On December 24, 2025, spouse of the Reporting Person transferred 7,583,085 shares to the Caroline DeWitte Family Trust for no consideration. Spouse of the Reporting Person is trustee of the trust. Spouse of the Reporting Person, members of her family and certain charitable organizations are the beneficiaries of the trust. Spouse of the Reporting Person remains the beneficial owner of the securities held by the trust. F7: Represents securities held by the Reporting Person's spouse. F8: These shares were previously reported as beneficially owned by the Reporting Person's spouse but were contributed to a grantor retained annuity trust on December 24, 2025. --- Signature --- /s/ /s/ Richard Craig Bealmear, Attorney-in-Fact (2025-12-29)