X0609 4 2026-10-17 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 2026-10-17 4 M 0 4400 A 18169 D Class A Common Stock 2026-10-19 4 S 0 2359 27.63 D 15810 D Restricted Stock Units 2026-10-17 4 M 0 4400 D Class A Common Stock 4400 42234 D Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Class A Common Stock. Includes 5,000 shares held in a joint account with the Reporting Person's spouse, previously reported as indirectly owned. The sale was to satisfy tax withholding obligations to be funded by a "sell to cover" transaction, effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on April 2, 2026, and does not represent a discretionary transaction by the Reporting Person. On March 25, 2026, the Reporting Person was granted 22,000 RSUs, vesting as to 20% of the underlying shares on October 17, 2026 and continuing to vest thereafter in 48 substantially equal monthly installments. On October 17, 2026 4,400 RSUs vested. /s/ Richard Craig Bealmear, Attorney-in-Fact 2026-10-20