Sec Form 4 Filing - Cochran Caroline @ Oklo Inc. - 2024-05-09

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Cochran Caroline 2. Issuer Name and Ticker or Trading Symbol Oklo Inc. [ OKLO] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner X __ Officer (give title below) _____ Other (specify below) Co-Founder, COO (Last) (First) (Middle) C/O OKLO INC., 3190 CORONADO DR. 3. Date of Earliest Transaction (MM/DD/YY) 05/09/2024 (Street) SANTA CLARA, CA95054 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class A Common Stock 05/09/2024 A( 1 ) 10,911,600 A 10,911,600 D Class A Common Stock 05/09/2024 A( 1 ) 11,190,452 A 11,190,452 I By Jacob DeWitte ( 2 )

< td style="text-align: center;"> ( 3 ) Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Earnout Rights 05/09/2024 A( 1 ) 2,012,162 ( 3 ) ( 3 ) Class A Common Stock 2,012,162 ( 1 ) 2,012,162 D Earnout Rights ( 3 ) 05/09/2024 A( 1 ) 2,063,583 ( 3 ) ( 3 ) Class A Common Stock 2,063,583 ( 1 ) 2,063,583 I By Jacob DeWitte ( 2 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Cochran Caroline C/O OKLO INC. 3190 CORONADO DR. SANTA CLARA, CA95054 X X Co-Founder, COO Signatures /s/ Richard Craig Bealmear, Attorney-in-Fact 05/13/2024 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents securities received as part of the Issuer's business combination, in connection with that certain Agreement and Plan of Merger and Reorganization, dated as of July 11, 2023 (the "Merger Agreement"), by and between the Issuer (formerly AltC Acquisition Corp.), AltC Merger Sub, Inc., and Oklo Inc. ("Legacy Oklo") pursuant to which shares of common stock of Legacy Oklo automatically converted into the right to receive (i) cash and Class A Common Stock of the Issuer and (ii) the right to receive Earnout Shares (as defined below). ( 2 )Represents securities held by the Reporting Person's spouse. ( 3 )Each earnout right represents a contingent right to receive one share of the Issuer's Class A Common Stock (each, an "Earnout Share") upon the satisfaction of certain price thresholds. Pursuant to an "earnout" provision in the Merger Agreement, the Earnout Shares may be issued in three separate tranches based upon (A) the closing sale price of one share of the Issuer's Class A Common Stock for any twenty trading days within any sixty consecutive trading day period within the five-year period following the closing of the Issuer's business combination or (B) if the Issuer undergoes a Change in Control (as defined in the Merger Agreement), the price per share received by stockholders of the Issuer in such Change in Control transaction.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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