William Carroll Murphy Goodwin - 19 May 2026 Form 4 Insider Report for Oklo Inc. (OKLO)

Reporting relationship: Chief Legal & Strategy Officer
Issuer ticker: OKLO
Reported as of: 19 May 2026
Net transaction value: -$612,206
SEC form: 4
Accepted by SEC: 21 May 2026, 16:37:15 UTC
Prior SEC filing: 26 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Richard Craig Bealmear, Attorney-in-Fact

Key filing fact

William Carroll Murphy Goodwin filed Form 4 for Oklo Inc. (OKLO) on 21 May 2026.

Key facts

This page summarizes William Carroll Murphy Goodwin's Form 4 filing for Oklo Inc. (OKLO).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 21 May 2026, 16:37.

Change

Previous filing in this sequence was filed on 26 Mar 2026.
Current net transaction value: -$612,206.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002080717 Primary reporting owner

Goodwin William Carroll Murphy

Relationship: Chief Legal & Strategy Officer
Address: C/O OKLO INC., 3190 CORONADO DR., SANTA CLARA
Signature: /s/ Richard Craig Bealmear, Attorney-in-Fact
Signature date: 21 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

OKLO transaction

Class A Common Stock

Options Exercise

Transaction value
Shares: +20,686
Change %: +79%
Price
Shares after: 46,723
Date: 19 May 2026
Ownership: Direct
Footnotes: F1, F2

OKLO transaction

Class A Common Stock

Sale

Transaction value: $612,206
Shares: -10,548
Change %: -23%
Price: $58.04
Shares after: 36,175
Date: 20 May 2026
Ownership: Direct
Footnotes: F2, F3

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

OKLO transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -20,686
Change %: -12%
Price: $0.000000^*
Shares after: 146,072
Date: 19 May 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 20,686
Exercise price
Footnotes: F1, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Class A Common Stock. On May 19, 2026, 20,686 RSUs were released to the Reporting Person.

Footnote F2

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.

Footnote F3

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.

Footnote F4

On August 12, 2024, the Reporting Person was granted 248,227 RSUs, vesting as to one-third of the underlying shares on August 12, 2025 and thereafter in eight substantially equal quarterly installments.