Who owns OKLO (OKLO)
Which tracked institutional funds hold OKLO, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See OKLO company fundamentals →
Ownership as of the 2026-Q1 13F filings. 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
84 tracked funds added or opened OKLO while 232 trimmed or exited it between 2025-Q4 and 2026-Q1 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
OKLO’s largest tracked holder by dollar value, VANGUARD GROUP INC, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes OKLO more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in OKLO divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 674 tracked filers holding OKLO, 420 increased or opened the position and 301 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in OKLO between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 43
- VANGUARD PORTFOLIO MANAGEMENT LLC$309M
- VANGUARD CAPITAL MANAGEMENT LLC$289M
- Defiance ETFs, LLC$181M
- Alyeska Investment Group, L.P.$85M
- VANGUARD FIDUCIARY TRUST CO$41M
- Hood River Capital Management LLC$29M
Full exits 45
- VANGUARD GROUP INC$825M
- NORGES BANK$74M
- Sculptor Capital LP$15M
- CloudAlpha Capital Management Limited/Hong Kong$12M
- Jain Global LLC$8M
- STRATEGIC PLANNING GROUP, LLC$7M
Largest adds
- D. E. Shaw & Co., Inc.$31M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$30M
- NATIONAL BANK OF CANADA /FI/$24M
- VAN ECK ASSOCIATES CORP$18M
- Connor, Clark & Lunn Investment Management Ltd.$10M
- BNP PARIBAS FINANCIAL MARKETS$7M
Largest trims
- BlackRock, Inc.$381M
- MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.$122M
- STATE STREET CORP$55M
- GEODE CAPITAL MANAGEMENT, LLC$50M
- Clear Street Group Inc.$36M
- CANTOR FITZGERALD, L. P.$33M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. trimmed | 13,772,901 | $683M | 13.4% | 2026-Q1 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 8,856,496 | $439M | 8.6% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 6,237,918 | $309M | 6.1% | 2026-Q1 |
| VAN ECK ASSOCIATES CORP added | 6,081,517 | $302M | 5.9% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 5,830,933 | $289M | 5.7% | 2026-Q1 |
| Defiance ETFs, LLC new | 3,643,044 | $181M | 3.5% | 2026-Q1 |
| STATE STREET CORP added | 3,326,142 | $165M | 3.2% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 3,054,149 | $151M | 3.0% | 2026-Q1 |
| MORGAN STANLEY added | 2,681,738 | $133M | 2.6% | 2026-Q1 |
| Alyeska Investment Group, L.P. added | 1,709,692 | $85M | 1.7% | 2026-Q1 |
| UBS Group AG added | 1,206,299 | $60M | 1.2% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 1,185,731 | $59M | 1.2% | 2026-Q1 |
| NORTHERN TRUST CORP added | 1,153,066 | $57M | 1.1% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 1,041,926 | $52M | 1.0% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 820,630 | $41M | 0.8% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 665,979 | $33M | 0.6% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 662,600 | $33M | 0.6% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 620,281 | $31M | 0.6% | 2026-Q1 |
| NATIONAL BANK OF CANADA /FI/ added | 609,164 | $30M | 0.6% | 2026-Q1 |
| Marex Group plc trimmed | 589,864 | $29M | 0.6% | 2026-Q1 |
| PORTLAND INVESTMENT COUNSEL INC. trimmed | 589,480 | $29M | 0.6% | 2026-Q1 |
| Hood River Capital Management LLC trimmed | 589,294 | $29M | 0.6% | 2026-Q1 |
| Capital World Investors added | 537,354 | $27M | 0.5% | 2026-Q1 |
| BANK OF MONTREAL /CAN/ trimmed | 537,170 | $27M | 0.5% | 2026-Q1 |
| LPL Financial LLC added | 533,951 | $26M | 0.5% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 533,000 | $26M | 0.5% | 2026-Q1 |
| Bank of New York Mellon Corp added | 516,886 | $26M | 0.5% | 2026-Q1 |
| Clear Street Group Inc. trimmed | 499,442 | $25M | 0.5% | 2026-Q1 |
| CANTOR FITZGERALD, L. P. trimmed | 484,541 | $24M | 0.5% | 2026-Q1 |
| Nuveen, LLC added | 461,143 | $23M | 0.4% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 451,280 | $22M | 0.4% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 397,806 | $20M | 0.4% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 353,804 | $18M | 0.3% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 351,727 | $17M | 0.3% | 2026-Q1 |
| ARK Investment Management LLC added | 351,169 | $17M | 0.3% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 331,540 | $16M | 0.3% | 2026-Q1 |
| Mirae Asset Global Investments Co., Ltd. trimmed | 331,391 | $16M | 0.3% | 2026-Q1 |
| Swiss National Bank added | 324,900 | $16M | 0.3% | 2026-Q1 |
| Legal & General Group Plc added | 318,061 | $16M | 0.3% | 2026-Q1 |
| Connor, Clark & Lunn Investment Management Ltd. added | 303,775 | $15M | 0.3% | 2026-Q1 |
| EXCHANGE TRADED CONCEPTS, LLC added | 298,995 | $15M | 0.3% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 307,055 | $14M | 0.3% | 2026-Q1 |
| BARCLAYS PLC trimmed | 280,471 | $14M | 0.3% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC new | 254,218 | $13M | 0.2% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 249,676 | $12M | 0.2% | 2026-Q1 |
| CARDIFF PARK ADVISORS, LLC added | 223,350 | $11M | 0.2% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 211,200 | $10M | 0.2% | 2026-Q1 |
| Man Group plc trimmed | 209,758 | $10M | 0.2% | 2026-Q1 |
| Sumitomo Mitsui Trust Group, Inc. trimmed | 206,946 | $10M | 0.2% | 2026-Q1 |
| Corient Private Wealth LLC trimmed | 204,753 | $10M | 0.2% | 2026-Q1 |
| Trexquant Investment LP added | 203,059 | $10M | 0.2% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. added | 136,094 | $10M | 0.2% | 2026-Q1 |
| FMR LLC trimmed | 190,770 | $9M | 0.2% | 2026-Q1 |
| OpenArc Corporate Advisory, LLC added | 189,620 | $9M | 0.2% | 2026-Q1 |
| CITIGROUP INC added | 188,719 | $9M | 0.2% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL new | 181,899 | $9M | 0.2% | 2026-Q1 |
| Rockefeller Capital Management L.P. added | 181,789 | $9M | 0.2% | 2026-Q1 |
| Quadrature Capital Ltd trimmed | 177,669 | $9M | 0.2% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 172,396 | $9M | 0.2% | 2026-Q1 |
| CIBC Bancorp USA Inc. added | 167,615 | $8M | 0.2% | 2026-Q1 |
| Amundi added | 164,824 | $8M | 0.2% | 2026-Q1 |
| California Public Employees Retirement System trimmed | 161,812 | $8M | 0.2% | 2026-Q1 |
| Mitsubishi UFJ Asset Management Co., Ltd. added | 161,103 | $8M | 0.2% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 160,317 | $8M | 0.2% | 2026-Q1 |
| ROYAL BANK OF CANADA trimmed | 150,370 | $7M | 0.1% | 2026-Q1 |
| AVIVA PLC added | 148,334 | $7M | 0.1% | 2026-Q1 |
| Foundations Investment Advisors, LLC added | 145,512 | $7M | 0.1% | 2026-Q1 |
| Cetera Investment Advisers added | 143,299 | $7M | 0.1% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 142,482 | $7M | 0.1% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 141,293 | $7M | 0.1% | 2026-Q1 |
| WINTON GROUP Ltd added | 134,379 | $7M | 0.1% | 2026-Q1 |
| Jump Financial, LLC trimmed | 132,822 | $7M | 0.1% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 131,188 | $7M | 0.1% | 2026-Q1 |
| Caprock Group, LLC trimmed | 131,115 | $7M | 0.1% | 2026-Q1 |
| Invesco Ltd. added | 130,516 | $6M | 0.1% | 2026-Q1 |
| Quantbot Technologies LP trimmed | 129,143 | $6M | 0.1% | 2026-Q1 |
| HSBC HOLDINGS PLC added | 126,975 | $6M | 0.1% | 2026-Q1 |
| KLP KAPITALFORVALTNING AS added | 124,100 | $6M | 0.1% | 2026-Q1 |
| Focus Partners Wealth trimmed | 119,322 | $6M | 0.1% | 2026-Q1 |
| Cambridge Investment Research Advisors, Inc. added | 114,485 | $6M | 0.1% | 2026-Q1 |
| Private Advisor Group, LLC trimmed | 114,026 | $6M | 0.1% | 2026-Q1 |
| NATIXIS added | 113,276 | $6M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 11,500,034 | $825M | 16.2% | 2025-Q4 stale |
| ExodusPoint Capital Management, LP added | 1,492,879 | $84M | 1.6% | 2025-Q2 stale |
| NORGES BANK new | 1,028,227 | $74M | 1.4% | 2025-Q4 stale |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC new | 567,759 | $32M | 0.6% | 2025-Q2 stale |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 267,600 | $30M | 0.6% | 2025-Q3 stale |
| Sculptor Capital LP trimmed | 208,100 | $15M | 0.3% | 2025-Q4 stale |
| Driehaus Capital Management LLC new | 110,298 | $12M | 0.2% | 2025-Q3 stale |
| CloudAlpha Capital Management Limited/Hong Kong added | 164,299 | $12M | 0.2% | 2025-Q4 stale |
| Headlands Technologies LLC trimmed | 167,247 | $9M | 0.2% | 2025-Q2 stale |
| Jain Global LLC added | 117,599 | $8M | 0.2% | 2025-Q4 stale |
| Y-Intercept (Hong Kong) Ltd added | 65,833 | $7M | 0.1% | 2025-Q3 stale |
| STRATEGIC PLANNING GROUP, LLC trimmed | 98,878 | $7M | 0.1% | 2025-Q4 stale |
| FFG Partners, LLC added | 93,037 | $7M | 0.1% | 2025-Q4 stale |
| PINEBRIDGE INVESTMENTS, L.P. new | 51,807 | $6M | 0.1% | 2025-Q3 stale |
| Windmill Hill Asset Management Ltd | 102,855 | $6M | 0.1% | 2025-Q2 stale |
| VestGen Advisors, LLC added | 50,252 | $6M | 0.1% | 2025-Q3 stale |
| SPX Gestao de Recursos Ltda added | 100,000 | $6M | 0.1% | 2025-Q2 stale |
| Covalis Capital LLP new | 100,000 | $6M | 0.1% | 2025-Q2 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.