Oklo

=== SEC Form 3 — Statement of Changes in Beneficial Ownership === Document Type: 3 Period of Report: 2026-07-27 --- Issuer --- Name: Oklo Inc. (OKLO) CIK: 0001849056 --- Reporting Owner --- Name: Narayanadas Vivek CIK: 0002146790 Role: Officer (General Counsel & Secretary) --- Holdings --- [Holding #1] Security: Class A Common Stock Ownership: D (Direct) [Holding #2] Security: Class A Common Stock Ownership: I (Indirect) [Holding #3] Security: Restricted Stock Units Ownership: D (Direct) Footnotes: [F2] Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock. [F1] The restricted stock units vest as to 20% of the underlying shares on October 17, 2026 and continue to vest thereafter in 48 substantially equal monthly installments. [F1] The restricted stock units vest as to 20% of the underlying shares on October 17, 2026 and continue to vest thereafter in 48 substantially equal monthly installments. [Holding #4] Security: Restricted Stock Units Ownership: D (Direct) Footnotes: [F2] Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock. [F3] The restricted stock units vest in twelve substantially equal monthly installments, which began on February 8, 2026. [F3] The restricted stock units vest in twelve substantially equal monthly installments, which began on February 8, 2026. [Holding #5] Security: Restricted Stock Units Ownership: D (Direct) Footnotes: [F2] Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock. [F4] The restricted stock units vest in three substantially equal annual installments beginning on March 31, 2027. [F4] The restricted stock units vest in three substantially equal annual installments beginning on March 31, 2027. [Holding #6] Security: Restricted Stock Units Ownership: D (Direct) Footnotes: [F2] Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock. [F5] The restricted stock units vest in three substantially equal annual installments, which began on March 6, 2026. [F5] The restricted stock units vest in three substantially equal annual installments, which began on March 6, 2026. [Holding #7] Security: Restricted Stock Units Ownership: D (Direct) Footnotes: [F2] Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock. [F6] The restricted stock units vest in full on September 11, 2026. [F6] The restricted stock units vest in full on September 11, 2026. [Holding #8] Security: Restricted Stock Units Ownership: D (Direct) Footnotes: [F2] Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock. [F7] The restricted stock units vest as to 20% of the underlying shares on February 3, 2026 and continue to vest thereafter in 24 substantially equal monthly installments. [F7] The restricted stock units vest as to 20% of the underlying shares on February 3, 2026 and continue to vest thereafter in 24 substantially equal monthly installments. --- Footnotes (Complete Index) --- F1: The restricted stock units vest as to 20% of the underlying shares on October 17, 2026 and continue to vest thereafter in 48 substantially equal monthly installments. F2: Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock. F3: The restricted stock units vest in twelve substantially equal monthly installments, which began on February 8, 2026. F4: The restricted stock units vest in three substantially equal annual installments beginning on March 31, 2027. F5: The restricted stock units vest in three substantially equal annual installments, which began on March 6, 2026. F6: The restricted stock units vest in full on September 11, 2026. F7: The restricted stock units vest as to 20% of the underlying shares on February 3, 2026 and continue to vest thereafter in 24 substantially equal monthly installments. --- Signature --- /s/ /s/ Richard Craig Bealmear, Attorney-in-Fact (2026-08-04)