Who owns Oklo (OKLO)?

82 holders named in SEC filings declare between 37.4% and 51.5% of Oklo's shares outstanding, as of Sep 28, 2026. The largest are Jacob DeWitte (10.9%), Vanguard (7.5%) and Mirae Asset (5.0%); the five largest hold 31.6% together. Another 590 institutions hold small positions worth 4.1%. At least 44.4% of the shares appear in no ownership filing: investors who do not have to report, mostly individuals. From Mar 31, 2026 to Jun 30, 2026, institutions that filed both quarters bought 7.5% and sold 12.6% of the shares, a net sale of 5.1%; 106 opened a position, 244 added, 168 reduced and 113 sold out. Biggest buyers: VanEck (+1.8M shares) and Marshall Wace (+1.1M shares). Biggest sellers: BlackRock (-8.6M) and Defiance ETFs, LLC (-3.5M). Schedule 13D/G filings since Mar 31, 2026: Jacob DeWitte cut its stake to 11.1% on Jul 1, 2026 and BlackRock, Inc. fell below 5% (3.3% still declared) on Jun 30, 2026. Directors and officers, from their latest Form 4: Jacob DeWitte (10.9%), Alexandra Renner (0.32%) and Richard Craig Bealmear (0.25%). Over time, 658 managers declared Oklo in their 13F for Q2 2026, against 93 for Q2 2024: together at most 46.9% of the shares outstanding, against 32.7%.

Oklo institutional ownership over time

From SEC Form 13F, every quarter since the end of 2019, read like the current quarter: entities of a house summed, a value contradicting its share count set aside. The share of the company is an upper bound — two managers can declare the same shares — over the shares outstanding at that date.

More on Oklo

• Oklo stock (OKLO): price and overview
• Oklo dividend
• Oklo financials
• Oklo technicals and short interest

All tracked companies · Holders · Dividends