813 institutions reported holding $6.12B of Oklo Inc (ALCC) in SEC 13F filings for 2026-03-31. Largest institutional holders: BlackRock, Inc. ($788.9M), JANE STREET GROUP, LLC ($461.6M), SUSQUEHANNA INTERNATIONAL GROUP, LLP ($444.7M), MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. ($439.2M), VANGUARD PORTFOLIO MANAGEMENT LLC ($309.3M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | BlackRock, Inc. | $788.9M | 15.9M | Added |
| 2 | JANE STREET GROUP, LLC | $461.6M | 9.3M | Trimmed |
| 3 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $444.7M | 9.0M | Added |
| 4 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $439.2M | 8.9M | Added |
| 5 | VANGUARD PORTFOLIO MANAGEMENT LLC | $309.3M | 6.2M | New |
| 6 | VAN ECK ASSOCIATES CORP | $301.6M | 6.1M | Added |
| 7 | VANGUARD CAPITAL MANAGEMENT LLC | $289.2M | 5.8M | New |
| 8 | CITADEL ADVISORS LLC | $270.1M | 5.4M | Trimmed |
| 9 | Defiance ETFs, LLC | $180.7M | 3.6M | New |
| 10 | STATE STREET CORP | $164.9M | 3.3M | Added |
| 11 | IMC-Chicago, LLC | $159.2M | 3.2M | Trimmed |
| 12 | GEODE CAPITAL MANAGEMENT, LLC | $151.2M | 3.1M | Added |
| 13 | MORGAN STANLEY | $133.0M | 2.7M | Added |
| 14 | Alyeska Investment Group, L.P. | $84.8M | 1.7M | New |
| 15 | UBS Group AG | $72.8M | 1.5M | Added |
| 16 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $58.8M | 1.2M | Added |
| 17 | NORTHERN TRUST CORP | $57.2M | 1.2M | Added |
| 18 | CANTOR FITZGERALD, L. P. | $55.8M | 1.1M | Trimmed |
| 19 | GROUP ONE TRADING LLC | $52.5M | 1.1M | Trimmed |
| 20 | GOLDMAN SACHS GROUP INC | $51.7M | 1.0M | Trimmed |
| 21 | BANK OF MONTREAL /CAN/ | $46.9M | 944,770 | Trimmed |
| 22 | VANGUARD FIDUCIARY TRUST CO | $40.7M | 820,630 | New |
| 23 | PEAK6 LLC | $40.0M | 807,189 | Trimmed |
| 24 | Walleye Trading LLC | $36.1M | 728,100 | Added |
| 25 | D. E. Shaw & Co., Inc. | $32.9M | 662,600 | Trimmed |
Source: SEC Form 13F filings · as of 2026-03-31