ASPI Institutional Ownership & Shareholders
ASP ISOTOPES INC (ASPI) is currently held by 183 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $387.85M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of ASPI tracked by InsiderSet, reporting ownership valued at approximately $57.33M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $17.88M, representing an estimated loss of -68.81% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 64% of the total disclosed ASPI value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Encompass Capital Advisors Llc, Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in ASP ISOTOPES INC (ASPI).
This page ranks the largest institutional ASPI shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
183
Total Reported Value
$387.85M
Largest Holder
Blackrock, Inc.
Largest Position
$57.33M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
64
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 9,217,198 | $57,330,971 | $17,881,364 | -$39,449,607 | -68.81% | |
| Encompass Capital Advisors Llc | 1.76% | 6,561,754 | $40,814,110 | $12,729,803 | -$28,084,307 | -68.81% | |
| Vanguard Capital Management Llc | 0.00% | 4,982,953 | $30,993,968 | $9,666,929 | -$21,327,039 | -68.81% | |
| Rovida Investment Management Ltd | 1.74% | 4,100,000 | $25,502,000 | $7,954,000 | -$17,548,000 | -68.81% | |
| Ubs Group Ag | 0.00% | 3,247,633 | $20,200,277 | $6,300,408 | -$13,899,869 | -68.81% | |
| Geode Capital Management, Llc | 0.00% | 2,945,901 | $18,328,141 | $5,715,048 | -$12,613,093 | -68.82% | |
| Alyeska Investment Group, L.P. | 0.05% | 2,843,503 | $17,686,589 | $5,516,396 | -$12,170,193 | -68.81% | |
| State Street Corp | 0.00% | 2,595,573 | $16,144,464 | $5,035,412 | -$11,109,052 | -68.81% | |
| Awm Investment Company, Inc. | 0.85% | 1,581,490 | $9,836,868 | $3,068,091 | -$6,768,777 | -68.81% | |
| Bnp Paribas Asset Management Holding S.A. | 0.01% | 1,577,016 | $9,809,040 | $3,059,411 | -$6,749,629 | -68.81% | |
| Philadelphia Financial Management Of San Francisco, Llc | 2.29% | 1,343,007 | $8,353,504 | $2,605,434 | -$5,748,070 | -68.81% | |
| Morgan Stanley | 0.00% | 1,162,320 | $7,229,630 | $2,254,901 | -$4,974,729 | -68.81% | |
| Vanguard Portfolio Management Llc | 0.00% | 1,115,391 | $6,937,732 | $2,163,859 | -$4,773,873 | -68.81% | |
| Northern Trust Corp | 0.00% | 1,007,214 | $6,264,871 | $1,953,995 | -$4,310,876 | -68.81% | |
| Charles Schwab Investment Management Inc | 0.00% | 935,352 | $5,817,889 | $1,814,583 | -$4,003,306 | -68.81% | |
| Barclays Plc | 0.00% | 847,781 | $5,273,199 | $1,644,695 | -$3,628,504 | -68.81% | |
| Marshall Wace, Llp | 0.00% | 835,656 | $5,197,780 | $1,621,173 | -$3,576,607 | -68.81% | |
| Man Group Plc | 0.01% | 828,377 | $5,152,505 | $1,607,051 | -$3,545,454 | -68.81% | |
| Vanguard Fiduciary Trust Co | 0.00% | 788,561 | $4,904,849 | $1,529,808 | -$3,375,041 | -68.81% | |
| Pacer Advisors, Inc. | 0.01% | 734,960 | $4,571,000 | $1,425,822 | -$3,145,178 | -68.81% | |
| Bank Of America Corp | 0.00% | 709,057 | $4,410,335 | $1,375,571 | -$3,034,764 | -68.81% | |
| Susquehanna International Group, Llp | 0.00% | 705,153 | $4,386,052 | $1,367,997 | -$3,018,055 | -68.81% | |
| Goldman Sachs Group Inc | 0.00% | 576,276 | $3,584,437 | $1,117,975 | -$2,466,462 | -68.81% | |
| Wim Investment Management Ltd | 1.10% | 541,400 | $3,367,508 | $1,050,316 | -$2,317,192 | -68.81% | |
| Diametric Capital, Lp | 0.36% | 538,517 | $3,349,575 | $1,044,723 | -$2,304,852 | -68.81% | |
| Nuveen, Llc | 0.00% | 493,421 | $3,069,079 | $957,237 | -$2,111,842 | -68.81% | |
| Group One Trading Llc | 0.08% | 458,383 | $2,851,142 | $889,263 | -$1,961,879 | -68.81% | |
| Shay Capital Llc | 0.28% | 413,000 | $2,568,860 | $801,220 | -$1,767,640 | -68.81% | |
| Rathbones Group Plc | 0.01% | 381,619 | $2,373,670 | $740,341 | -$1,633,329 | -68.81% | |
| Citadel Advisors Llc | 0.00% | 357,591 | $2,224,216 | $693,727 | -$1,530,489 | -68.81% | |
| Bank Of New York Mellon Corp | 0.00% | 356,872 | $2,219,743 | $692,332 | -$1,527,411 | -68.81% | |
| Exchange Traded Concepts, Llc | 0.01% | 794,468 | $2,105,340 | $1,541,268 | -$564,072 | -26.79% | |
| Caprock Group, Llc | 0.04% | 321,365 | $1,998,890 | $623,448 | -$1,375,442 | -68.81% | |
| Hite Hedge Asset Management Llc | 0.10% | 301,837 | $1,877,426 | $585,564 | -$1,291,862 | -68.81% | |
| Bank Of Montreal | 0.00% | 262,560 | $1,633,123 | $509,366 | -$1,123,757 | -68.81% | |
| Saba Capital Management, L.P. | 0.05% | 261,470 | $1,626,343 | $507,252 | -$1,119,091 | -68.81% | |
| Jpmorgan Chase & Co | 0.00% | 241,054 | $1,499,356 | $467,645 | -$1,031,711 | -68.81% | |
| Headlands Technologies Llc | 0.16% | 240,197 | $1,494,025 | $465,982 | -$1,028,043 | -68.81% | |
| Empowered Funds, Llc | 0.01% | 225,089 | $1,400,054 | $436,673 | -$963,381 | -68.81% | |
| Dnb Asset Management As | 0.00% | 214,880 | $1,336,554 | $416,867 | -$919,687 | -68.81% | |
| Swiss National Bank | 0.00% | 214,700 | $1,335,434 | $416,518 | -$918,916 | -68.81% | |
| Invesco Ltd. | 0.00% | 203,976 | $1,268,731 | $395,713 | -$873,018 | -68.81% | |
| Russell Investments Group, Ltd. | 0.00% | 181,776 | $1,130,651 | $352,645 | -$778,006 | -68.81% | |
| Stifel Financial Corp | 0.00% | 166,034 | $1,032,732 | $322,106 | -$710,626 | -68.81% | |
| Aquatic Capital Management Llc | 0.04% | 163,978 | $1,019,943 | $318,117 | -$701,826 | -68.81% | |
| Cetera Investment Advisers | 0.00% | 152,965 | $951,442 | $296,752 | -$654,690 | -68.81% | |
| Polen Capital Management | David M. Polen | 0.01% | 149,559 | $930,257 | $290,144 | -$640,113 | -68.81% |
| Rhumbline Advisers | 0.00% | 141,284 | $878,776 | $274,091 | -$604,685 | -68.81% | |
| Squarepoint Ops Llc | 0.00% | 123,951 | $770,975 | $240,465 | -$530,510 | -68.81% | |
| Citigroup Inc | 0.00% | 121,309 | $754,542 | $235,339 | -$519,203 | -68.81% |
Frequently asked questions about ASPI
Who are the largest institutional holders of ASPI?
The largest institutional holders of ASPI reported in the latest SEC Form 13F filings include Blackrock, Inc., Encompass Capital Advisors Llc, Vanguard Capital Management Llc, Rovida Investment Management Ltd, and Ubs Group Ag. InsiderSet ranks institutional holders by their latest reported ASPI position.
What is ASPI institutional ownership?
This page tracks ASPI positions reported by institutional investment managers through SEC Form 13F. ASP ISOTOPES INC (ASPI) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ASPI?
InsiderSet currently tracks 183 institutional managers reporting ASPI holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of ASPI shareholders.
How much ASPI stock do institutions own?
Institutional investment managers disclosed approximately $387.85M in ASPI holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ASPI institutional ownership last updated?
The latest ASPI institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional ASPI holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its ASPI position after the reporting date.
Are institutions buying or selling ASPI?
Institutional buying and selling can be analyzed by comparing ASPI positions across consecutive 13F reporting periods. InsiderSet's ASPI Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ASPI ownership changes.
How has ASPI institutional ownership changed over time?
InsiderSet tracks ASPI institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.