Oklo 4: CFO sells 16.5K shares for $608K (Oct 5, 2026)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-10-01 10b5-1 Pre-arranged Plan: Yes --- 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: 2026-10-01 | Code: M (Exercise of derivative) Shares: +16,477 | Price: $3.18 Total Value: $52,396.86 Shares Owned After: 478,119 | 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: 2026-10-01 | Code: S (Open market sale) Shares: -16,477 | Price: $36.87 Total Value: $607,506.99 Shares Owned After: 461,642 | Ownership: D (Direct) Footnotes: [F2] This sale reported herein was 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: 2026-10-02 | Code: M (Exercise of derivative) Shares: +5,619 | Price: $3.18 Total Value: $17,868.42 Shares Owned After: 467,261 | 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. --- Derivative Transactions --- [Transaction #1] Security: Stock Options Date: 2026-10-01 | Code: M (Exercise of derivative) Shares: -16,477 | Price: $0.00 Exercise Price: $3.18 Exercisable: N/A | Expires: 2033-12-22 Shares Owned After: 597,542 | 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 48 substantially equal monthly installments. [Transaction #2] Security: Stock Options Date: 2026-10-02 | Code: M (Exercise of derivative) Shares: -5,619 | Price: $0.00 Exercise Price: $3.18 Exercisable: N/A | Expires: 2033-12-22 Shares Owned After: 591,923 | 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 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: This sale reported herein was 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 48 substantially equal monthly installments. --- Signature --- /s/ /s/ Richard Craig Bealmear (2026-10-05)