ASPI ASP ISOTOPES
ASP ISOTOPES (ASPI) Institutional Ownership
What the institutions did with ASPI last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 9.2M | 14.1% |
| Encompass Capital Advisors LLC | 6.6M | 10.0% |
| VANGUARD CAPITAL MANAGEMENT LLC | 5.0M | 7.6% |
| Rovida Investment Management Ltd | 4.1M | 6.3% |
| UBS Group AG | 3.2M | 5.0% |
| GEODE CAPITAL MANAGEMENT, LLC | 2.9M | 4.5% |
| Alyeska Investment Group, L.P. | 2.8M | 4.3% |
| STATE STREET CORP | 2.6M | 4.0% |
| EXCHANGE TRADED CONCEPTS, LLC | 2.3M | 3.4% |
| AWM Investment Company, Inc. | 1.6M | 2.4% |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 1.6M | 2.4% |
| Philadelphia Financial Management of San Francisco, LLC | 1.3M | 2.1% |
| MORGAN STANLEY | 1.2M | 1.8% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1.1M | 1.7% |
| NORTHERN TRUST CORP | 1.0M | 1.5% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 935.4K | 1.4% |
| BARCLAYS PLC | 847.8K | 1.3% |
| MARSHALL WACE, LLP | 835.7K | 1.3% |
| Man Group plc | 828.4K | 1.3% |
| VANGUARD FIDUCIARY TRUST CO | 788.6K | 1.2% |
| Pacer Advisors, Inc. | 735.0K | 1.1% |
| BANK OF AMERICA CORP /DE/ | 709.1K | 1.1% |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 705.2K | 1.1% |
| GOLDMAN SACHS GROUP INC | 576.3K | 0.9% |
| WIM INVESTMENT MANAGEMENT Ltd | 541.4K | 0.8% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| BlackRock, Inc. | Increased | 8.3M | 9.2M | +889.1K |
| MARSHALL WACE, LLP | New | 0 | 835.7K | +835.7K |
| Man Group plc | New | 0 | 828.4K | +828.4K |
| Philadelphia Financial Management of San Francisco, LLC | Increased | 648.3K | 1.3M | +694.7K |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | Increased | 887.2K | 1.6M | +689.8K |
| JANE STREET GROUP, LLC | Reduced | 684.5K | 21.1K | -663.4K |
| Sara-Bay Financial | Sold Out | 586.7K | 0 | -586.7K |
| AWM Investment Company, Inc. | Reduced | 2.1M | 1.6M | -543.0K |
| BANK OF AMERICA CORP /DE/ | Increased | 169.0K | 709.1K | +540.1K |
| Diametric Capital, LP | Reduced | 953.5K | 538.5K | -415.0K |
| MORGAN STANLEY | Reduced | 1.6M | 1.2M | -414.1K |
| CITADEL ADVISORS LLC | Reduced | 768.0K | 357.6K | -410.4K |
| UBS Group AG | Increased | 2.8M | 3.2M | +405.9K |
| Rathbones Group PLC | Reduced | 773.1K | 381.6K | -391.5K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | 1.1M | 705.2K | -352.2K |
| Encompass Capital Advisors LLC | Reduced | 6.9M | 6.6M | -350.3K |
| Yaupon Capital Management LP | Sold Out | 300.0K | 0 | -300.0K |
| Alight Capital Management LP | Sold Out | 300.0K | 0 | -300.0K |
| Nuveen, LLC | Increased | 207.4K | 493.4K | +286.0K |
| STATE STREET CORP | Increased | 2.3M | 2.6M | +273.4K |
| IMC-Chicago, LLC | Sold Out | 268.5K | 0 | -268.5K |
| Burkehill Global Management, LP | Sold Out | 250.0K | 0 | -250.0K |
| Pacer Advisors, Inc. | Increased | 503.9K | 735.0K | +231.0K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 2.7M | 2.9M | +205.4K |
| Arosa Capital Management LP | Sold Out | 200.0K | 0 | -200.0K |
| BARCLAYS PLC | Reduced | 1.0M | 847.8K | -165.2K |
| Headlands Technologies LLC | Increased | 75.2K | 240.2K | +165.0K |
| Aquatic Capital Management LLC | New | 0 | 164.0K | +164.0K |
| TUDOR INVESTMENT CORP ET AL | Sold Out | 161.0K | 0 | -161.0K |
| DNB Asset Management AS | Increased | 59.8K | 214.9K | +155.1K |
| Alyeska Investment Group, L.P. | Increased | 2.7M | 2.8M | +151.3K |
| Invesco Ltd. | Increased | 56.6K | 204.0K | +147.3K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 977.2K | 1.1M | +138.2K |
| GROUP ONE TRADING LLC | Reduced | 595.6K | 458.4K | -137.2K |
| Massar Capital Management, LP | Reduced | 147.4K | 20.3K | -127.0K |
| Point72 Asset Management, L.P. | New | 0 | 120.2K | +120.2K |
| PFG Investments, LLC | Reduced | 152.3K | 38.4K | -113.9K |
| Chicago Partners Investment Group LLC | Reduced | 374.1K | 265.5K | -108.6K |
| Polymer Capital Management (US) LLC | New | 0 | 105.5K | +105.5K |
| Saba Capital Management, L.P. | Reduced | 357.6K | 261.5K | -96.2K |
| WINTON GROUP Ltd | New | 0 | 94.5K | +94.5K |
| Farther Finance Advisors, LLC | Reduced | 150.2K | 62.6K | -87.6K |
| PRELUDE CAPITAL MANAGEMENT, LLC | Reduced | 153.7K | 66.5K | -87.1K |
| SG Americas Securities, LLC | Reduced | 98.0K | 10.9K | -87.0K |
| PEAK6 LLC | Sold Out | 79.2K | 0 | -79.2K |
| SEI INVESTMENTS CO | Reduced | 148.6K | 69.8K | -78.9K |
| VANGUARD CAPITAL MANAGEMENT LLC | Reduced | 5.1M | 5.0M | -77.5K |
| Belpointe Asset Management LLC | Reduced | 101.6K | 27.9K | -73.7K |
| EXCHANGE TRADED CONCEPTS, LLC | Increased | 2.2M | 2.3M | +72.0K |
| NORTHERN TRUST CORP | Increased | 937.5K | 1.0M | +69.7K |
| ALLIANCEBERNSTEIN L.P. | Increased | 38.8K | 107.8K | +69.0K |
| Bank of New York Mellon Corp | Increased | 289.0K | 356.9K | +67.9K |
| FORT WASHINGTON INVESTMENT ADVISORS INC /OH/ | New | 0 | 67.1K | +67.1K |
| WELLS FARGO & COMPANY/MN | Increased | 49.7K | 116.1K | +66.4K |
| Balyasny Asset Management L.P. | Reduced | 76.5K | 11.6K | -64.9K |
| WIM INVESTMENT MANAGEMENT Ltd | Reduced | 601.4K | 541.4K | -60.0K |
| Kingsview Wealth Management, LLC | New | 0 | 54.1K | +54.1K |
| Squarepoint Ops LLC | Increased | 70.6K | 124.0K | +53.4K |
| Virtu Financial LLC | Sold Out | 50.5K | 0 | -50.5K |
| Bleakley Financial Group, LLC | New | 0 | 50.0K | +50.0K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.