X0609 4 2026-09-03 0 0001849056 Oklo Inc. OKLO 0002146790 Narayanadas Vivek false C/O OKLO INC. 3190 CORONADO DRIVE SANTA CLARA CA 95054 0 1 0 0 General Counsel & Secretary 1 Class A Common Stock 2026-09-03 4 M 0 1014 A 8613 D Class A Common Stock 2026-09-04 4 S 0 538 39.88 D 8075 D Class A Common Stock 2026-09-08 4 M 0 687 A 8762 D Class A Common Stock 5000 I Joint account with spouse Restricted Stock Units 2026-09-03 4 M 0 1014 0 D Class A Common Stock 1014 17241 D Restricted Stock Units 2026-09-08 4 M 0 687 0 D Class A Common Stock 687 2746 D Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Class A Common Stock. 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. On February 3, 2025, the Reporting Person was granted 36,508 RSUs, vesting as to 20% of the underlying shares on February 3, 2026 and continuing to vest thereafter in 24 substantially equal monthly installments. On September 3, 2026 1,014 RSUs vested. On July 17, 2026, the Reporting Person was granted 8,240 RSUs, and the RSUs vest in 12 substantially equal monthly installments. On September 8, 2026, 687 RSUs vested. /s/ Richard Craig Bealmear, Attorney-in-Fact 2026-09-08