X0609 4 2026-06-01 0 0001849056 Oklo Inc. OKLO 0001855623 Bealmear Richard Craig false C/O OKLO INC. 3190 CORONADO DR. SANTA CLARA CA 95054 0 1 0 0 Chief Financial Officer 1 Class A Common Stock 2026-06-01 4 M 0 16238 3.18 A 413880 D Class A Common Stock 2026-06-01 4 S 0 16238 65 D 397642 D Class A Common Stock 2026-06-01 4 M 0 100000 3.18 A 497642 D Class A Common Stock 2026-06-01 4 S 0 10000 69.31 D 487642 D Class A Common Stock 2026-06-01 4 G 0 2100 0 D 485542 D Class A Common Stock 2026-06-01 4 S 0 46843 69.42 D 438699 D Class A Common Stock 2026-06-02 4 M 0 5858 3.18 A 444557 D Stock Options 3.18 2026-06-01 4 M 0 16238 0 D 2033-12-22 Class A Common Stock 16238 786165 D Stock Options 3.18 2026-06-01 4 M 0 100000 0 D 2033-12-22 Class A Common Stock 100000 686165 D Stock Options 3.18 2026-06-02 4 M 0 5858 0 D 2033-12-22 Class A Common Stock 5858 680307 D 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. This sale reported herein was effected pursuant to a Rule 10b5-1 plan adopted on September 22, 2025. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $69.30- $69.34 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein. Represents shares donated as a gift by the Reporting Person to a donor-advised fund. After donation, the Reporting Person will have no control over, and will not be able to direct the disposition of, the donated shares by such donor-advised fund. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $69.35- $69.55 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein. 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. /s/ Richard Craig Bealmear 2026-06-03