144 0002021433 XXXXXXXX LIVE 0001849056 Oklo, Inc. 001-40583 3190 Coronado Drive Santa Clara CA 95054 650-550-0127 Jacob DeWitte CEO / Director / 10% Shareholder Class A Common Stock J.P. Morgan Securities LLC 270 Park Avenue, 10h Floor New York NY 10017 400000 15532000 173990987 08/03/2026 NYSE Class A Common Stock 03/27/2025 Transfer From Jacob DeWitte, who acquired the Founder shares on 12/31/13 N 160000 03/27/2025 N/A Class A Common Stock 12/31/2013 Founder Shares Issuer N 240000 12/31/2013 N/A N Jacob DeWitte C/o Oklo, Inc. 3190 Coronado Drive Santa Clara CA 95054 Class A Common Stock 06/01/2026 60000 4097154 Jacob DeWitte C/o Oklo, Inc. 3190 Coronado Drive Santa Clara CA 95054 Class A Common Stock 07/01/2026 60000 3175727 Jacob DeWitte Grantor Annuity Trust #1 C/o Oklo, Inc. 3190 Coronado Drive Santa Clara CA 95054 Class A Common Stock 06/01/2026 40000 2731436 Jacob DeWitte Grantor Annuity Trust #1 C/o Oklo, Inc. 3190 Coronado Drive Santa Clara CA 95054 Class A Common Stock 07/01/2026 40000 2117151 Caroline Cochran C/o Oklo, Inc. 3190 Coronado Drive Santa Clara CA 95054 Class A Common Stock 06/01/2026 60000 4097154 Caroline Cochran C/o Oklo, Inc. 3190 Coronado Drive Santa Clara CA 95054 Class A Common Stock 07/01/2026 60000 3175727 Caroline Cochran Grantor Annuity Trust #1 C/o Oklo, Inc. 3190 Coronado Drive Santa Clara CA 95054 Class A Common Stock 06/01/2026 40000 2731436 Caroline Cochran Grantor Annuity Trust #1 C/o Oklo, Inc. 3190 Coronado Drive Santa Clara CA 95054 Class A Common Stock 07/01/2026 40000 2117151 The shares filed today will be sold by Jacob DeWitte & the Jacob DeWitte Grantor Retained Annuity Trust No. 1, Jacob DeWitte as Trustee. 08/03/2026 09/22/2025 /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Jacob DeWitte