| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Mann Paul Elliot | 11% | -9.2% | $41,341,584 | +$6,087,797 | 7,712,982 | +17% | Mann Paul Elliot | 31 Dec 2024 |
| AK Jensen Investment Management Ltd | 5.4% | -17% | $47,669,611 | +$2,373,350 | 4,955,261 | +5.2% | AK Jensen Investment Management Ltd | 30 Sep 2025 |
| BlackRock, Inc. | 5.5% | $21,200,880 | 3,955,388 | BlackRock, Inc. | 31 Dec 2024 | |||
| BNP Paribas Asset Management UK Ltd | 5.1% | $19,447,232 | 3,628,215 | BNP Paribas Asset Management UK Ltd | 31 Mar 2025 | |||
| AWM Investment Company, Inc. | 6.9% | $4,661,452 | 619,874 | AWM Investment Company, Inc. | 30 Jun 2025 |
As of 30 Sep 2025, 156 institutional investors reported holding 52,905,307 shares of ASP Isotopes Inc. - Common stock, par value $0.01 per share (ASPI). This represents 58% of the company’s total 91,764,093 outstanding shares.
The largest institutional shareholders of ASP Isotopes Inc. - Common stock, par value $0.01 per share (ASPI) together control 46% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 6% | 5,460,992 | +36% | 0% | $52,534,744 |
| VANGUARD GROUP INC | 4.9% | 4,516,763 | +38% | 0% | $43,451,260 |
| Rovida Investment Management Ltd | 3.5% | 3,200,000 | +45% | 3.5% | $30,688,000 |
| AWM Investment Company, Inc. | 3.2% | 2,958,596 | -25% | 2.7% | $28,461,694 |
| Alyeska Investment Group, L.P. | 3.1% | 2,822,695 | -32% | 0.08% | $27,154,326 |
| Capital Research Global Investors | 2.2% | 2,043,567 | -29% | 0% | $19,659,115 |
| GEODE CAPITAL MANAGEMENT, LLC | 2% | 1,862,455 | +38% | 0% | $17,920,765 |
| Philadelphia Financial Management of San Francisco, LLC | 1.8% | 1,661,494 | -38% | 3.2% | $15,983,572 |
| Driehaus Capital Management LLC | 1.5% | 1,419,837 | +1% | 0.1% | $13,658,832 |
| STATE STREET CORP | 1.5% | 1,405,732 | +26% | 0% | $13,523,142 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1.5% | 1,341,783 | +1212% | 0.02% | $12,907,952 |
| Telemark Asset Management, LLC | 1.4% | 1,325,000 | -7% | 1.2% | $12,746,500 |
| MARSHALL WACE, LLP | 1.4% | 1,279,121 | +3669% | 0.01% | $12,305,145 |
| JANE STREET GROUP, LLC | 1.3% | 1,218,717 | +716% | 0.01% | $11,724,058 |
| EXCHANGE TRADED CONCEPTS, LLC | 1.3% | 1,206,280 | -7.5% | 0.11% | $11,604,414 |
| CITADEL ADVISORS LLC | 1.3% | 1,165,765 | +703% | 0.01% | $11,214,659 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 1.1% | 1,047,758 | +3839% | 0% | $10,080,000 |
| UBS Group AG | 1% | 961,292 | -33% | 0% | $9,247,629 |
| Jump Financial, LLC | 1% | 934,500 | 0.12% | $8,989,890 | |
| Sara-Bay Financial | 0.98% | 903,103 | 2.4% | $8,687,851 | |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 0.72% | 663,939 | -66% | 0.02% | $6,387,000 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.72% | 661,961 | +278% | 0% | $6,368,065 |
| GROUP ONE TRADING LLC | 0.68% | 628,243 | -11% | 0.18% | $6,043,698 |
| Squarepoint Ops LLC | 0.68% | 624,807 | 0.01% | $6,010,643 | |
| NORTHERN TRUST CORP | 0.65% | 600,049 | +38% | 0% | $5,772,472 |
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2025 Q4 | 1,417,228 | $7,582,169 | +$800,967 | $5.35 | 7 |
| 2025 Q3 | 52,905,307 | $508,770,188 | +$110,775,066 | $9.62 | 156 |
| 2025 Q2 | 41,457,954 | $305,098,103 | +$67,158,257 | $7.36 | 128 |
| 2025 Q1 | 32,449,321 | $152,180,878 | +$1,683,981 | $4.69 | 95 |
| 2024 Q4 | 32,368,343 | $146,626,225 | +$46,429,858 | $4.53 | 90 |
| 2024 Q3 | 22,358,987 | $62,155,606 | +$36,093,163 | $2.78 | 65 |
| 2024 Q2 | 8,782,584 | $26,865,000 | +$14,523,618 | $3.06 | 50 |
| 2024 Q1 | 3,770,857 | $15,573,438 | +$9,482,875 | $4.13 | 30 |
| 2023 Q4 | 1,674,490 | $3,011,098 | +$2,345,436 | $1.79 | 19 |
| 2023 Q3 | 308,068 | $292,885 | -$942,408 | $0.95 | 11 |
| 2023 Q2 | 551,482 | $1,024,133 | -$1,744,788 | $0.57 | 4 |
| 2023 Q1 | 3,248,596 | $2,772,962 | +$2,733,353 | $0.85 | 6 |
| 2022 Q4 | 47,212 | $75,285 | +$75,285 | $1.58 | 3 |