William Carroll Murphy Goodwin - 22 Dec 2025 Form 4 Insider Report for Oklo Inc. (OKLO)

Role: Chief Legal & Strategy Officer
Signature: /s/ Richard Craig Bealmear, Attorney-in-Fact
Issuer symbol: OKLO
Transactions as of: 22 Dec 2025
Net transactions value: -$159,866
Form type: 4
Filing time: 10 Mar 2026, 20:23:48 UTC
Previous filing: 02 Dec 2025
Next filing: 17 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Goodwin William Carroll Murphy	Chief Legal & Strategy Officer	C/O OKLO INC., 3190 CORONADO DR., SANTA CLARA	/s/ Richard Craig Bealmear, Attorney-in-Fact	10 Mar 2026	0002080717

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	OKLO	Class A Common Stock	Options Exercise		+5,191	+38%		18,811	06 Mar 2026	Direct	F1
transaction	OKLO	Class A Common Stock	Sale	$159,866	-2,820	-15%	$56.69	15,991	09 Mar 2026	Direct	F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	OKLO	Restricted Stock Units	Options Exercise		-5,191	-3.1%	$0.000000^*	159,943	06 Mar 2026	Class A Common Stock	5,191		Direct	F1, F3
transaction	OKLO	Restricted Stock Units	Award		+27,500	+17%	$0.000000^*	187,443	22 Dec 2025	Class A Common Stock	27,500		Direct	F4, F5

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Class A Common Stock. On March 6, 2026, 5,191 RSUs were released to the Reporting Person.
F2	Represents the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of the RSUs listed in Table II. The sale was to satisfy tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary transaction by the Reporting Person.
F3	On November 4, 2025 the Reporting Person was granted 3,294 RSUs, vesting in full as to all the underlying shares on September 26, 2026. On December 22, 2025, the Reporting Person was granted 15,574 RSUs, vesting as to one-third of the underlying shares on December 31, 2025 and thereafter in two substantially equal annual installments.
F4	Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock.
F5	On December 22, 2025, the Reporting Person was granted 27,500 RSUs, vesting as to one-third of the underlying shares on March 31, 2027 and thereafter in two substantially equal annual installments.