Asp IsotopesASPI
13F holders, Q4 2025 (December 31)173holders +16
46new positions
32sold out
4famous investors
$5.35avg. 13F price*
At the end of Q4 2025, 173 institutions reported holding Asp Isotopes Inc. (ASPI) in their 13F filings, up 16 from Q3 2025. 46 opened new positions and 32 sold out. The largest holders were BlackRock, Inc. ($36.3M), Vanguard Group Inc. ($34.3M) and Alyeska Investment Group, L.P. ($26.2M). 4 famous investors held it, including Ken Griffin (0.0% of Citadel Advisors's portfolio), Paul Tudor Jones (0.0% of Tudor Investment Corporation's portfolio) and David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio).
- Company
- Asp Isotopes Inc.
- CUSIP
- 00218A105
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 46 | $19.5M |
| Exits | 32 | $92.2M |
All 13F filers, Q3 2025 → Q4 2025: 20,532,473 shares bought and 15,104,991 shares sold, net +5,427,482 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 173 holders
| BlackRock, Inc. | 0.00% | Add +24.3% | 6,789,417 | $36.3M |
| Vanguard Group Inc. | 0.00% | Add +41.8% | 6,406,244 | $34.3M |
| Alyeska Investment Group, L.P. | 0.07% | Add +73.4% | 4,895,546 | $26.2M |
| Rovida Investment Management Ltd | 2.98% | Add +28.1% | 4,100,000 | $21.9M |
| UBS Group AG | 0.00% | Add +150.3% | 2,406,457 | $12.9M |
| Geode Capital Management, LLC | 0.00% | Add +28.0% | 2,384,066 | $12.8M |
| AWM Investment Company, Inc. | 1.10% | Reduce -28.2% | 2,124,496 | $11.4M |
| State Street Corp. | 0.00% | Add +31.2% | 1,844,405 | $9.9M |
| Citadel Advisors | 0.01% | Add +48.0% | 1,725,553 | $9.2M |
| Goldman Sachs Group Inc. | 0.00% | Add +319.6% | 1,715,292 | $9.2M |
| Morgan Stanley | 0.00% | Add +288.8% | 1,709,783 | $9.1M |
| Jane Street Group, LLC | 0.01% | Add +30.2% | 1,586,961 | $8.5M |
| Susquehanna International Group, LLP | 0.01% | Add +13.0% | 1,516,643 | $8.1M |
| Exchange Traded Concepts, LLC | 0.06% | Add +16.1% | 1,400,314 | $7.5M |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 0.01% | Add +42.2% | 944,326 | $5.1M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +33.8% | 885,739 | $4.7M |
| Telemark Asset Management, LLC | 0.44% | Reduce -37.7% | 825,000 | $4.4M |
| Marshall Wace, LLP | 0.00% | Reduce -36.0% | 818,129 | $4.4M |
| Northern Trust Corp. | 0.00% | Add +24.3% | 745,909 | $4.0M |
| Diametric Capital, LP | 1.06% | Add +107.3% | 737,304 | $3.9M |
| WIM INVESTMENT MANAGEMENT Ltd | 0.83% | New | 601,400 | $3.2M |
| Shay Capital LLC | 0.50% | Add +291.2% | 579,000 | $3.1M |
| Barclays PLC | 0.00% | Add +118.1% | 506,788 | $2.7M |
| HITE Hedge Asset Management LLC | 0.15% | New | 449,883 | $2.4M |
| Group One Trading LLC | 0.07% | Reduce -29.3% | 444,345 | $2.4M |
| Schonfeld Strategic Advisors LLC | 0.01% | Add +107.6% | 414,875 | $2.2M |
| Pacer Advisors, Inc. | 0.01% | New | 404,372 | $2.2M |
| Rathbones Group PLC | 0.01% | Add +68.6% | 399,599 | $2.1M |
| Quantbot Technologies LP | 0.07% | Add +11040.4% | 396,599 | $2.1M |
| Saba Capital Management, L.P. | 0.06% | New | 356,377 | $1.9M |
| Two Sigma Investments, LP | 0.00% | Add +5.6% | 356,237 | $1.9M |
| Gsa Capital Partners LLP | 0.15% | Add +2.9% | 329,488 | $1.8M |
| Caprock Group, LLC | 0.04% | Add +8.9% | 322,314 | $1.7M |
| IMC-Chicago, LLC | 0.03% | Add +786.3% | 294,502 | $1.6M |
| Burkehill Global Management, LP | 0.09% | New | 250,000 | $1.3M |
| Bank of New York Mellon Corp | 0.00% | Add +15.3% | 243,987 | $1.3M |
| Bank of America Corp. | 0.00% | Add +80.0% | 230,856 | $1.2M |
| Prelude Capital Management, LLC | 0.09% | Add +132.2% | 228,487 | $1.2M |
| Swiss National Bank | 0.00% | New | 210,100 | $1.1M |
| Arosa Capital Management LP | 0.69% | New | 200,000 | $1.1M |
| JPMorgan Chase & Co. | 0.00% | Reduce -48.1% | 194,479 | $1.0M |
| VARCOV Co. | 0.40% | — | 188,649 | $1.0M |
| Verition Fund Management LLC | 0.01% | Reduce -48.4% | 187,728 | $1.0M |
| Nuveen, LLC | 0.00% | Add +9.2% | 182,725 | $978K |
| PFG Investments, LLC | 0.05% | Add +663.9% | 181,800 | $973K |
| SBI Securities Co., Ltd. | 0.02% | Add +196.2% | 152,120 | $814K |
| Massar Capital Management, LP | 0.16% | New | 147,376 | $788K |
| Russell Investments Group, Ltd. | 0.00% | Add +14.9% | 145,463 | $778K |
| Polen Capital Management LLC | 0.00% | Reduce -40.1% | 139,511 | $746K |
| Empowered Funds, LLC | 0.01% | New | 134,602 | $720K |
| Tudor Investment Corporation | 0.00% | Reduce -71.1% | 132,936 | $711K |
| Wells Fargo & Company | 0.00% | Add +179.8% | 131,671 | $704K |
| Penn Capital Management Company, LLC | 0.05% | Reduce -37.2% | 126,916 | $679K |
| Farther Finance Advisors, LLC | 0.01% | Add +12.0% | 124,563 | $666K |
| Bank of Montreal | 0.00% | Add +12.9% | 117,886 | $631K |
| Stifel Financial Corp. | 0.00% | Reduce -6.9% | 109,852 | $588K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | New | 102,376 | $548K |
| Rhumbline Advisers | 0.00% | Reduce -0.7% | 101,537 | $543K |
| Canal Insurance CO | 0.13% | Add +233.3% | 100,000 | $535K |
| Simplex Trading, LLC | 0.01% | Add +599.5% | 93,716 | $501K |
| AlphaQuest LLC | 0.03% | Add +211.9% | 88,177 | $472K |
| Jefferies Financial Group Inc. | 0.00% | Add +120.8% | 87,260 | $467K |
| Marex Group Ltd | 0.00% | Add +24.4% | 85,201 | $456K |
| FNY Investment Advisers, LLC | 0.13% | Add +580.8% | 85,100 | $455K |
| Southport Management, L.L.C. | 1.59% | Add +183.3% | 85,000 | $455K |
| Balyasny Asset Management L.P. | 0.00% | Add +87.8% | 80,527 | $431K |
| Moore Capital Management, LP | 0.01% | Reduce -60.0% | 80,000 | $428K |
| California State Teachers Retirement System | 0.00% | Add +1949.6% | 77,208 | $413K |
| Sei Investments Co. | 0.00% | New | 77,004 | $412K |
| Legal & General Group Plc | 0.00% | Add +813.4% | 76,511 | $409K |
| Citigroup Inc. | 0.00% | Add +410.8% | 75,352 | $403K |
| Brevan Howard Capital Management LP | 0.01% | Add +17.8% | 72,000 | $386K |
| Cetera Investment Advisers | 0.00% | Add +453.9% | 71,307 | $381K |
| Deutsche Bank AG | 0.00% | Add +60.7% | 68,620 | $367K |
| Graham Capital Management, L.P. | 0.02% | New | 66,998 | $358K |
| National Bank of Canada | 0.00% | Add +107.0% | 62,397 | $333K |
| Invesco Ltd. | 0.00% | Reduce -58.4% | 59,553 | $319K |
| Quantinno Capital Management LP | 0.00% | New | 56,776 | $304K |
| D. E. Shaw & Co. | 0.00% | New | 54,037 | $289K |
| MetLife Investment Management, LLC | 0.00% | Add +15.1% | 52,633 | $282K |
| Osaic Holdings, Inc. | 0.00% | Add +37.2% | 50,686 | $271K |
| Resolute Capital Asset Partners LLC | 0.13% | New | 50,000 | $268K |
| T. Rowe Price Associates Inc. | 0.00% | Reduce -95.3% | 49,044 | $263K |
| MH & Associates Securities Management Corp. | 0.21% | — | 48,666 | $260K |
| LPL Financial LLC | 0.00% | Add +261.5% | 47,600 | $255K |
| Commonwealth Equity Services, LLC | 0.00% | Reduce -31.4% | 44,899 | $240K |
| Atom Investors LP | 0.02% | New | 44,661 | $239K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +20.6% | 42,940 | $230K |
| Janus Henderson Group PLC | 0.00% | New | 39,000 | $208K |
| Axq Capital, LP | 0.05% | New | 38,092 | $204K |
| Caitong International Asset Management Co., Ltd | 0.05% | Add +177.2% | 34,983 | $187K |
| Allegheny Financial Group | 0.03% | Add +2.9% | 34,473 | $184K |
| Advisory Services Network, LLC | 0.00% | Add +10.0% | 34,372 | $184K |
| Royal Bank of Canada | 0.00% | Reduce -70.3% | 32,048 | $172K |
| Dark Forest Capital Management LP | 0.01% | New | 30,737 | $164K |
| Raymond James Financial Inc. | 0.00% | New | 29,566 | $158K |
| Intech Investment Management LLC | 0.00% | Reduce -14.1% | 29,516 | $158K |
| AQR Capital Management | 0.00% | Reduce -91.0% | 29,356 | $157K |
| Leonteq Securities AG | 0.01% | Add +256.4% | 28,515 | $153K |
| Manufacturers Life Insurance Company, The | 0.00% | Add +12.2% | 28,033 | $150K |
"% of holder's portfolio" is ASPI's weight in each manager's 13F, not the share of Asp Isotopes Inc. the manager owns.