ASP ISOTOPES INC (ASPI) Institutional Shareholders
ASP ISOTOPES INC (ASPI) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $403.42M in ASPI holdings during the latest filing period.
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 $39.36M, representing an estimated loss of -31.35% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 62% 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
185
Total Reported Value
$403.42M
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 | $39,357,435 | -$17,973,536 | -31.35% | |
| Encompass Capital Advisors Llc | 1.76% | 6,561,754 | $40,814,110 | $28,018,690 | -$12,795,420 | -31.35% | |
| Vanguard Capital Management Llc | 0.00% | 4,982,953 | $30,993,968 | $21,277,209 | -$9,716,759 | -31.35% | |
| Rovida Investment Management Ltd | 1.74% | 4,100,000 | $25,502,000 | $17,507,000 | -$7,995,000 | -31.35% | |
| Ubs Group Ag | 0.00% | 3,247,633 | $20,200,277 | $13,867,393 | -$6,332,884 | -31.35% | |
| Geode Capital Management, Llc | 0.00% | 2,945,901 | $18,328,141 | $12,578,997 | -$5,749,144 | -31.37% | |
| Alyeska Investment Group, L.P. | 0.05% | 2,843,503 | $17,686,589 | $12,141,758 | -$5,544,831 | -31.35% | |
| State Street Corp | 0.00% | 2,595,573 | $16,144,464 | $11,083,097 | -$5,061,367 | -31.35% | |
| Exchange Traded Concepts, Llc | 0.07% | 2,255,509 | $14,029,266 | $9,631,023 | -$4,398,243 | -31.35% | |
| Awm Investment Company, Inc. | 0.85% | 1,581,490 | $9,836,868 | $6,752,962 | -$3,083,906 | -31.35% | |
| Bnp Paribas Asset Management Holding S.A. | 0.01% | 1,577,016 | $9,809,040 | $6,733,858 | -$3,075,182 | -31.35% | |
| Philadelphia Financial Management Of San Francisco, Llc | 2.29% | 1,343,007 | $8,353,504 | $5,734,640 | -$2,618,864 | -31.35% | |
| Morgan Stanley | 0.00% | 1,162,320 | $7,229,630 | $4,963,106 | -$2,266,524 | -31.35% | |
| Vanguard Portfolio Management Llc | 0.00% | 1,115,391 | $6,937,732 | $4,762,720 | -$2,175,012 | -31.35% | |
| Northern Trust Corp | 0.00% | 1,007,214 | $6,264,871 | $4,300,804 | -$1,964,067 | -31.35% | |
| Charles Schwab Investment Management Inc | 0.00% | 935,352 | $5,817,889 | $3,993,953 | -$1,823,936 | -31.35% | |
| Sixth Street Partners Management Company, L.P. | 0.00% | 935,352 | $5,817,889 | $3,993,953 | -$1,823,936 | -31.35% | |
| Barclays Plc | 0.00% | 847,781 | $5,273,199 | $3,620,025 | -$1,653,174 | -31.35% | |
| Marshall Wace, Llp | 0.00% | 835,656 | $5,197,780 | $3,568,251 | -$1,629,529 | -31.35% | |
| Man Group Plc | 0.01% | 828,377 | $5,152,505 | $3,537,170 | -$1,615,335 | -31.35% | |
| Vanguard Fiduciary Trust Co | 0.00% | 788,561 | $4,904,849 | $3,367,155 | -$1,537,694 | -31.35% | |
| Bank Of America Corp | 0.00% | 709,057 | $4,410,335 | $3,027,673 | -$1,382,662 | -31.35% | |
| Susquehanna International Group, Llp | 0.00% | 705,153 | $4,386,052 | $3,011,003 | -$1,375,049 | -31.35% | |
| Goldman Sachs Group Inc | 0.00% | 576,276 | $3,584,437 | $2,460,699 | -$1,123,738 | -31.35% | |
| Wim Investment Management Ltd | 1.10% | 541,400 | $3,367,508 | $2,311,778 | -$1,055,730 | -31.35% | |
| Diametric Capital, Lp | 0.36% | 538,517 | $3,349,575 | $2,299,468 | -$1,050,107 | -31.35% | |
| Nuveen, Llc | 0.00% | 493,421 | $3,069,079 | $2,106,908 | -$962,171 | -31.35% | |
| Group One Trading Llc | 0.08% | 458,383 | $2,851,142 | $1,957,295 | -$893,847 | -31.35% | |
| Shay Capital Llc | 0.28% | 413,000 | $2,568,860 | $1,763,510 | -$805,350 | -31.35% | |
| Rathbones Group Plc | 0.01% | 381,619 | $2,373,670 | $1,629,513 | -$744,157 | -31.35% | |
| Citadel Advisors Llc | 0.00% | 357,591 | $2,224,216 | $1,526,914 | -$697,302 | -31.35% | |
| Bank Of New York Mellon Corp | 0.00% | 356,872 | $2,219,743 | $1,523,843 | -$695,900 | -31.35% | |
| Caprock Group, Llc | 0.04% | 321,365 | $1,998,890 | $1,372,229 | -$626,661 | -31.35% | |
| Hite Hedge Asset Management Llc | 0.10% | 301,837 | $1,877,426 | $1,288,844 | -$588,582 | -31.35% | |
| Bank Of Montreal | 0.00% | 262,560 | $1,633,123 | $1,121,131 | -$511,992 | -31.35% | |
| Saba Capital Management, L.P. | 0.05% | 261,470 | $1,626,343 | $1,116,477 | -$509,866 | -31.35% | |
| Jpmorgan Chase & Co | 0.00% | 241,054 | $1,499,356 | $1,029,301 | -$470,055 | -31.35% | |
| Headlands Technologies Llc | 0.16% | 240,197 | $1,494,025 | $1,025,641 | -$468,384 | -31.35% | |
| Dnb Asset Management As | 0.00% | 214,880 | $1,336,554 | $917,538 | -$419,016 | -31.35% | |
| Swiss National Bank | 0.00% | 214,700 | $1,335,434 | $916,769 | -$418,665 | -31.35% | |
| Invesco Ltd. | 0.00% | 203,976 | $1,268,731 | $870,978 | -$397,753 | -31.35% | |
| Purewater Capital Llc | 0.87% | 194,387 | $1,209,087 | $830,032 | -$379,055 | -31.35% | |
| Russell Investments Group, Ltd. | 0.00% | 181,776 | $1,130,651 | $776,184 | -$354,467 | -31.35% | |
| Chicago Partners Investment Group Llc | 0.02% | 265,459 | $1,072,454 | $1,133,510 | +$61,056 | +5.69% | |
| Stifel Financial Corp | 0.00% | 166,034 | $1,032,732 | $708,965 | -$323,767 | -31.35% | |
| Aquatic Capital Management Llc | 0.04% | 163,978 | $1,019,943 | $700,186 | -$319,757 | -31.35% | |
| Sbi Securities Co., Ltd. | 0.02% | 159,346 | $991,132 | $680,407 | -$310,725 | -31.35% | |
| Cetera Investment Advisers | 0.00% | 152,965 | $951,442 | $653,161 | -$298,281 | -31.35% | |
| Polen Capital Management | David M. Polen | 0.01% | 149,559 | $930,257 | $638,617 | -$291,640 | -31.35% |
| Rhumbline Advisers | 0.00% | 141,284 | $878,776 | $603,283 | -$275,493 | -31.35% |
Frequently asked questions about ASPI
Who owns the most ASPI stock?
The largest holders of ASPI are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for ASP ISOTOPES INC (ASPI).
Is ASPI widely held by superinvestors?
Many widely followed stocks like ASPI appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly ASPI is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.