Oklo 4: Bealmear Richard Craig bought 16,342 shares of Class A Comm… (Apr 3, 2026)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-04-01 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: Oklo Inc. (OKLO) CIK: 0001849056 --- Reporting Owner --- Name: Bealmear Richard Craig CIK: 0001855623 Role: Officer (Chief Financial Officer) --- Non-Derivative Transactions --- [Transaction #1] Security: Class A Common Stock Date: 2026-04-01 | Code: M (Exercise of derivative) Shares: +16,342 | Price: $3.18 Total Value: $51,967.56 Shares Owned After: 402,350 | Ownership: D (Direct) Footnotes: [F1] For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission. [Transaction #2] Security: Class A Common Stock Date: 2026-04-01 | Code: S (Open market sale) Shares: -16,342 | Price: $51.08 Total Value: $834,749.36 Shares Owned After: 386,008 | Ownership: D (Direct) Footnotes: [F2] The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on September 22, 2025. [F1] For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission. [Transaction #3] Security: Class A Common Stock Date: 2026-04-02 | Code: M (Exercise of derivative) Shares: +5,754 | Price: $3.18 Total Value: $18,297.72 Shares Owned After: 391,762 | Ownership: D (Direct) --- Derivative Transactions --- [Transaction #1] Security: Stock Options Date: 2026-04-01 | Code: M (Exercise of derivative) Shares: -16,342 | Price: $0.00 Exercisable: N/A | Expires: 2033-12-22 Shares Owned After: 830,253 | Ownership: D (Direct) Footnotes: [F3] The stock option vested as to 20% of the underlying shares on August 1, 2024 and continues to vest thereafter in 47 substantially equal monthly installments. [Transaction #2] Security: Stock Options Date: 2026-04-02 | Code: M (Exercise of derivative) Shares: -5,754 | Price: $0.00 Exercisable: N/A | Expires: 2033-12-22 Shares Owned After: 824,499 | Ownership: D (Direct) Footnotes: [F4] The stock option vested as to 20% of the underlying shares on August 1, 2024 and continues to vest thereafter in 48 substantially equal monthly installments. --- Footnotes (Complete Index) --- F1: For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission. F2: The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on September 22, 2025. F3: The stock option vested as to 20% of the underlying shares on August 1, 2024 and continues to vest thereafter in 47 substantially equal monthly installments. F4: The stock option vested as to 20% of the underlying shares on August 1, 2024 and continues to vest thereafter in 48 substantially equal monthly installments. --- Signature --- /s/ /s/ Richard Craig Bealmear (2026-04-03)