Oklo

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-09-09 10b5-1 Pre-arranged Plan: Yes --- Issuer --- Name: Oklo Inc. (OKLO) CIK: 0001849056 --- Reporting Owner --- Name: Narayanadas Vivek CIK: 0002146790 Role: Officer (General Counsel & Secretary) --- Non-Derivative Transactions --- [Transaction #1] Security: Class A Common Stock Date: 2026-09-09 | Code: S (Open market sale) Shares: -365 | Price: $43.31 Total Value: $15,808.15 Shares Owned After: 8,159 | Ownership: D (Direct) Footnotes: [F1] Represents the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of the RSUs. The sale was to satisfy tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary transaction by the Reporting Person. --- Holdings --- [Holding #1] Security: Class A Common Stock Ownership: I (Indirect) --- Footnotes (Complete Index) --- F1: Represents the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of the RSUs. The sale was to satisfy tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary transaction by the Reporting Person. --- Signature --- /s/ /s/ Richard Craig Bealmear, Attorney-in-Fact (2026-09-10)