OKLO's three largest insider shareholders as of September 29, 2026 are Jacob Dewitte (Co Founder, Ceo, 16.42Mn shares), Caroline Cochran (Co Founder, Coo, 16.42Mn shares), Michael Stuart Klein (Director, 13.95Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Michael Stuart Klein | Director, TenPercentOwner | 0 | 14,100,000 | 14,100,000 | 61.5% | 24 Sep, 2025 |
| 2 | Samuel H. Altman | Director | 0 | 3,732,479 | 3,732,479 | 16.3% | 21 Nov, 2024 |
| 3 | Caroline Cochran | Co Founder, Coo | 398,039 | 1,457,495 | 1,855,534 | 8.1% | 02 Sep, 2026 |
| 4 | Jacob Dewitte | Co Founder, Ceo | 431,533 | 1,424,001 | 1,855,534 | 8.1% | 02 Sep, 2026 |
| 5 | Alexandra Renner | Chief Product Officer | 477,595 | 0 | 477,595 | 2.1% | 29 Sep, 2026 |
| 6 | Richard Craig Bealmear | Chief Financial Officer | 461,642 | 0 | 461,642 | 2.0% | 03 Sep, 2026 |
| 7 | John Hanson | Chief Of Staff | 361,350 | 0 | 361,350 | 1.6% | 29 Sep, 2026 |
| 8 | William Carroll Murphy Goodwin | Chief Strategy Officer | 46,787 | 0 | 46,787 | 0.2% | 29 Sep, 2026 |
| 9 | Patrick Joseph Schweiger | Chief Technology Officer | 19,430 | 0 | 19,430 | 0.1% | 25 Mar, 2026 |
| 10 | Richard Kinzley | Director | 0 | 15,754 | 15,754 | 0.1% | 30 Mar, 2026 |
| 11 | Vivek Narayanadas | General Counsel Secretary | 8,369 | 0 | 8,369 | 0.0% | 15 Sep, 2026 |
| 12 | John M Jansen | Director | 6,000 | 0 | 6,000 | 0.0% | 15 Sep, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 26 Sep, 2026 | William Carroll Murphy Goodwin | Chief Strategy Officer | Acquired M | 3,294 | — | — | 48,562 | Direct |
| 26 Sep, 2026 | John Hanson | Chief Of Staff | Acquired M | 2,059 | — | — | 362,450 | Direct |
| 26 Sep, 2026 | Alexandra Renner | Chief Product Officer | Acquired M | 2,471 | — | — | 478,695 | Direct |
| 28 Sep, 2026 | Alexandra Renner | Chief Product Officer | Disposed S | 1,100 | $37.39 | $41.13K | 477,595 | Direct |
| 28 Sep, 2026 | John Hanson | Chief Of Staff | Disposed S | 1,100 | $37.39 | $41.13K | 361,350 | Direct |
| 28 Sep, 2026 | William Carroll Murphy Goodwin | Chief Strategy Officer | Disposed S | 1,775 | $37.39 | $66.37K | 46,787 | Direct |
| 26 Sep, 2026 | William Carroll Murphy Goodwin | Chief Strategy Officer | Disposed M | 3,294 | $0.00 | $0 | 94,593 | Direct |
| 26 Sep, 2026 | John Hanson | Chief Of Staff | Disposed M | 2,059 | $0.00 | $0 | 53,062 | Direct |
| 26 Sep, 2026 | Alexandra Renner | Chief Product Officer | Disposed M | 2,471 | $0.00 | $0 | 127,171 | Direct |
| 09 Sep, 2026 | Vivek Narayanadas | General Counsel Secretary | Disposed S | 365 | $43.31 | $15.81K | 8,159 | Direct |
| 08 Sep, 2026 | Vivek Narayanadas | General Counsel Secretary | Disposed S | 238 | $42.06 | $10.01K | 8,524 | Direct |
| 03 Sep, 2026 | Vivek Narayanadas | General Counsel Secretary | Acquired M | 1,014 | — | — | 8,613 | Direct |
| 04 Sep, 2026 | Vivek Narayanadas | General Counsel Secretary | Disposed S | 538 | $39.88 | $21.46K | 8,075 | Direct |
| 08 Sep, 2026 | Vivek Narayanadas | General Counsel Secretary | Acquired M | 687 | — | — | 8,762 | Direct |
| 03 Sep, 2026 | Vivek Narayanadas | General Counsel Secretary | Disposed M | 1,014 | $0.00 | $0 | 17,241 | Direct |
| 08 Sep, 2026 | Vivek Narayanadas | General Counsel Secretary | Disposed M | 687 | $0.00 | $0 | 2,746 | Direct |
| 01 Sep, 2026 | Richard Craig Bealmear | Chief Financial Officer | Acquired M | 16,430 | $3.18 | $52.25K | 472,406 | Direct |
| 01 Sep, 2026 | Alexandra Renner | Chief Product Officer | Disposed S | 1,930 | $38.40 | $74.11K | 475,022 | Direct |
| 01 Sep, 2026 | Richard Craig Bealmear | Chief Financial Officer | Disposed S | 16,430 | $38.76 | $636.83K | 455,976 | Direct |
| 02 Sep, 2026 | Richard Craig Bealmear | Chief Financial Officer | Acquired M | 5,666 | $3.18 | $18.02K | 461,642 | Direct |