Asp IsotopesASPI
13F holders, Q3 2025 (September 30)157holders +27
44new positions
16sold out
6famous investors
$9.62avg. 13F price*
At the end of Q3 2025, 157 institutions reported holding Asp Isotopes Inc. (ASPI) in their 13F filings, up 27 from Q2 2025. 44 opened new positions and 16 sold out. The largest holders were BlackRock, Inc. ($52.5M), Vanguard Group Inc. ($43.5M) and Rovida Investment Management Ltd ($30.7M). 6 famous investors held it, including Paul Tudor Jones (0.0% of Tudor Investment Corporation's portfolio), Ken Griffin (0.0% of Citadel Advisors's portfolio) and Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio).
- Company
- Asp Isotopes Inc.
- CUSIP
- 00218A105
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 44 | $44.6M |
| Exits | 16 | $3.5M |
All 13F filers, Q2 2025 → Q3 2025: 18,639,861 shares bought and 7,518,923 shares sold, net +11,120,938 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 157 holders
| BlackRock, Inc. | 0.00% | Add +35.5% | 5,460,992 | $52.5M |
| Vanguard Group Inc. | 0.00% | Add +37.9% | 4,516,763 | $43.5M |
| Rovida Investment Management Ltd | 3.48% | Add +45.5% | 3,200,000 | $30.7M |
| AWM Investment Company, Inc. | 2.67% | Reduce -24.7% | 2,958,596 | $28.5M |
| Alyeska Investment Group, L.P. | 0.08% | Reduce -32.5% | 2,822,695 | $27.2M |
| Capital Research Global Investors | 0.00% | Reduce -28.8% | 2,043,567 | $19.7M |
| Geode Capital Management, LLC | 0.00% | Add +38.2% | 1,862,455 | $17.9M |
| Philadelphia Financial Management of San Francisco, LLC | 3.20% | Reduce -37.8% | 1,661,494 | $16.0M |
| Driehaus Capital Management LLC | 0.10% | Add +1.0% | 1,419,837 | $13.7M |
| State Street Corp. | 0.00% | Add +26.2% | 1,405,732 | $13.5M |
| Susquehanna International Group, LLP | 0.02% | Add +1211.7% | 1,341,783 | $12.9M |
| Telemark Asset Management, LLC | 1.21% | Reduce -7.0% | 1,325,000 | $12.7M |
| Marshall Wace, LLP | 0.01% | Add +3669.1% | 1,279,121 | $12.3M |
| Jane Street Group, LLC | 0.01% | Add +715.6% | 1,218,717 | $11.7M |
| Exchange Traded Concepts, LLC | 0.11% | Reduce -7.5% | 1,206,280 | $11.6M |
| Citadel Advisors | 0.01% | Add +702.9% | 1,165,765 | $11.2M |
| T. Rowe Price Associates Inc. | 0.00% | Add +3839.4% | 1,047,758 | $10.1M |
| UBS Group AG | 0.00% | Reduce -32.7% | 961,292 | $9.2M |
| Jump Financial, LLC | 0.12% | New | 940,500 | $9.0M |
| Sara-Bay Financial | 2.43% | New | 903,103 | $8.7M |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 0.02% | Reduce -66.2% | 663,939 | $6.4M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +278.4% | 661,961 | $6.4M |
| Group One Trading LLC | 0.18% | Reduce -11.1% | 628,243 | $6.0M |
| Squarepoint Ops LLC | 0.01% | New | 624,807 | $6.0M |
| Northern Trust Corp. | 0.00% | Add +38.5% | 600,049 | $5.8M |
| Encompass Capital Advisors LLC | 0.22% | New | 500,000 | $4.8M |
| Tudor Investment Corporation | 0.03% | Add +37.5% | 460,685 | $4.4M |
| Morgan Stanley | 0.00% | Reduce -2.6% | 439,753 | $4.2M |
| Voloridge Investment Management, LLC | 0.01% | Add +85.5% | 417,908 | $4.0M |
| Goldman Sachs Group Inc. | 0.00% | Add +1336.8% | 408,752 | $3.9M |
| JPMorgan Chase & Co. | 0.00% | Add +71.0% | 374,716 | $3.6M |
| Verition Fund Management LLC | 0.02% | Add +417.8% | 363,765 | $3.5M |
| Diametric Capital, LP | 1.27% | Add +32.0% | 355,680 | $3.4M |
| Two Sigma Investments, LP | 0.01% | Reduce -1.6% | 337,245 | $3.2M |
| AQR Capital Management | 0.00% | Add +2237.2% | 328,022 | $3.2M |
| Gsa Capital Partners LLP | 0.26% | Reduce -16.7% | 320,236 | $3.1M |
| Creative Planning | 0.00% | Add +83.3% | 316,765 | $3.0M |
| Caprock Group, LLC | 0.07% | — | 296,000 | $2.7M |
| Millennium Management | 0.00% | Add +662.0% | 245,985 | $2.4M |
| Rathbones Group PLC | 0.01% | Add +13.9% | 237,064 | $2.3M |
| Polen Capital Management LLC | 0.01% | Add +33.0% | 232,913 | $2.2M |
| Barclays PLC | 0.00% | Add +32.1% | 232,364 | $2.2M |
| Concentric Capital Strategies, LP | 0.10% | New | 218,054 | $2.1M |
| Bank of New York Mellon Corp | 0.00% | Add +38.2% | 211,604 | $2.0M |
| Penn Capital Management Company, LLC | 0.15% | Add +983.0% | 202,144 | $1.9M |
| Renaissance Technologies | 0.00% | New | 201,200 | $1.9M |
| Moore Capital Management, LP | 0.04% | New | 200,000 | $1.9M |
| Schonfeld Strategic Advisors LLC | 0.01% | New | 199,847 | $1.9M |
| Baird Financial Group, Inc. | 0.00% | New | 192,308 | $1.9M |
| Nuveen, LLC | 0.00% | Add +26.8% | 167,375 | $1.6M |
| Shay Capital LLC | 0.26% | Add +240.2% | 148,000 | $1.4M |
| Invesco Ltd. | 0.00% | Reduce -69.6% | 143,307 | $1.4M |
| XTX Topco Ltd | 0.07% | Add +478.7% | 139,782 | $1.3M |
| Bank of America Corp. | 0.00% | Reduce -3.2% | 128,283 | $1.2M |
| Russell Investments Group, Ltd. | 0.00% | Add +1243.2% | 126,578 | $1.2M |
| Virtu Financial LLC | 0.06% | Add +28.8% | 120,131 | $1.2M |
| Stifel Financial Corp. | 0.00% | Add +206.8% | 117,952 | $1.1M |
| Farther Finance Advisors, LLC | 0.02% | Add +15.8% | 111,176 | $1.1M |
| SPX Gestao de Recursos Ltda | 0.09% | New | 109,600 | $1.1M |
| Royal Bank of Canada | 0.00% | Add +338.4% | 107,719 | $1.0M |
| Bank of Montreal | 0.00% | Add +286.6% | 104,372 | $1.0M |
| Rhumbline Advisers | 0.00% | Add +29.5% | 102,287 | $984K |
| Alliancebernstein L.P. | 0.00% | No change | 98,870 | $951K |
| Prelude Capital Management, LLC | 0.07% | Reduce -6.7% | 98,396 | $947K |
| Marex Group Ltd | 0.01% | Reduce -8.7% | 68,500 | $659K |
| Informed Momentum Co LLC | 0.08% | Reduce -11.2% | 68,148 | $656K |
| Commonwealth Equity Services, LLC | 0.00% | Add +23.5% | 65,434 | $629K |
| Scientech Research LLC | 0.22% | Reduce -7.0% | 64,388 | $619K |
| Brevan Howard Capital Management LP | 0.01% | New | 61,120 | $588K |
| HRT Financial LP | 0.00% | New | 54,714 | $526K |
| SBI Securities Co., Ltd. | 0.01% | Add +141.3% | 51,351 | $494K |
| MML Investors Services, LLC | 0.00% | Add +3.9% | 48,849 | $470K |
| Wells Fargo & Company | 0.00% | Add +60.3% | 47,066 | $453K |
| MetLife Investment Management, LLC | 0.00% | Add +31.0% | 45,717 | $440K |
| Nisa Investment Advisors, LLC | 0.00% | Add +4258.2% | 45,238 | $435K |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.00% | No change | 45,000 | $433K |
| Balyasny Asset Management L.P. | 0.00% | New | 42,888 | $413K |
| Deutsche Bank AG | 0.00% | Add +15.4% | 42,701 | $411K |
| Mariner, LLC | 0.00% | Add +43.2% | 41,030 | $395K |
| Jefferies Financial Group Inc. | 0.00% | New | 39,526 | $380K |
| Osaic Holdings, Inc. | 0.00% | Add +392.7% | 36,951 | $358K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +12.4% | 35,598 | $342K |
| Intech Investment Management LLC | 0.00% | Add +33.4% | 34,362 | $331K |
| Allegheny Financial Group | 0.06% | Reduce -1.2% | 33,498 | $322K |
| IMC-Chicago, LLC | 0.01% | Reduce -55.9% | 33,228 | $320K |
| OMERS ADMINISTRATION Corp | 0.00% | Reduce -73.2% | 32,600 | $314K |
| Advisory Services Network, LLC | 0.00% | Add +125.8% | 31,238 | $301K |
| National Bank of Canada | 0.00% | Add +1099.3% | 30,150 | $289K |
| Canal Insurance CO | 0.06% | New | 30,000 | $289K |
| Southport Management, L.L.C. | 1.19% | New | 30,000 | $289K |
| Sanctuary Advisors, LLC | 0.00% | Reduce -16.7% | 28,552 | $275K |
| AlphaQuest LLC | 0.02% | Reduce -18.6% | 28,272 | $272K |
| Centiva Capital, LP | 0.02% | New | 26,244 | $252K |
| Tower Research Capital LLC (TRC) | 0.01% | Add +131.4% | 25,203 | $242K |
| Corsair Capital Management, L.P. | 0.04% | New | 25,000 | $241K |
| Manufacturers Life Insurance Company, The | 0.00% | Add +19.9% | 24,997 | $240K |
| Belvedere Trading LLC | 0.02% | Add +0.8% | 23,822 | $229K |
| PFG Investments, LLC | 0.01% | Reduce -10.2% | 23,800 | $229K |
| Flow Traders U.S. LLC | 0.01% | New | 23,703 | $228K |
| Point72 Asset Management | 0.00% | New | 23,371 | $225K |
"% of holder's portfolio" is ASPI's weight in each manager's 13F, not the share of Asp Isotopes Inc. the manager owns.