As of April 17, 2026, ASP Isotopes's top three insider holders are Jensen Investment Management Ltd Ak (TenPercentOwner, 6.75Mn shares), Jensen Investment Management Ltd Ak (TenPercentOwner, 6.65Mn shares), Jensen Investment Management Ltd Ak (TenPercentOwner, 6.57Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Jensen Investment Management Ltd Ak | - | 0 | 6,746,874 | 16 Oct, 2024 |
| Jensen Investment Management Ltd Ak | - | 0 | 6,646,874 | 05 Aug, 2024 |
| Jensen Investment Management Ltd Ak | - | 0 | 6,566,874 | 05 Aug, 2024 |
| Paul Elliot Mann | Chief Executive Officer | 5,087,500 | 0 | 17 Feb, 2023 |
| Hendrik Strydom | - | 0 | 3,797,423 | 16 Nov, 2022 |
| Hendrik Strydom | - | 0 | 3,797,423 | 16 Nov, 2022 |
| Sergey Vasnetsov | - | 0 | 2,800,000 | 16 Nov, 2022 |
| Sergey Vasnetsov | - | 0 | 2,800,000 | 16 Nov, 2022 |
| Joshua Jay Donfeld | - | 1,000,000 | 0 | 16 Nov, 2022 |
| Joshua Jay Donfeld | - | 1,000,000 | 0 | 16 Nov, 2022 |
| Robert Ainscow | Chief Financial Officer | 900,000 | 0 | 17 Feb, 2023 |
| Robert John Andrew Ryan | - | 537,055 | 0 | 26 Feb, 2024 |
| Robert John Andrew Ryan | - | 537,055 | 0 | 26 Feb, 2024 |
| Todd Wider | - | 400,000 | 0 | 16 Nov, 2022 |
| Duncan Moore | - | 400,000 | 0 | 16 Nov, 2022 |
| Todd Wider | - | 400,000 | 0 | 16 Nov, 2022 |
| Duncan Moore | - | 400,000 | 0 | 16 Nov, 2022 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 11 Oct, 2024 | Jensen Investment Management Ltd Ak | Common Stock, par value $0.01 per share | A | 30,000 | $3.03 | 6,746,874 | I | A |
| 01 Aug, 2024 | Jensen Investment Management Ltd Ak | Common Stock, par value $0.01 per share (Common Stock) | D | 31,849 | $2.45 | 6,646,874 | I | S |
| 02 Aug, 2024 | Jensen Investment Management Ltd Ak | Common Stock | D | 80,000 | $2.23 | 6,566,874 | I | S |
| 08 Jul, 2024 | Jensen Investment Management Ltd Ak | Common Stock, par value $0.01 per share (Common Stock) | A | 70,000 | $3.05 | 6,586,874 | I | P |
| 09 Jul, 2024 | Jensen Investment Management Ltd Ak | Common Stock | A | 30,000 | $3.05 | 6,616,874 | I | P |
| 10 Jul, 2024 | Jensen Investment Management Ltd Ak | Common Stock | A | 61,849 | $3.40 | 6,678,723 | I | P |
| 14 Jan, 2024 | Robert John Andrew Ryan | Common Stock | A | 50,251 | - | 518,709 | D | A |
| 16 Jan, 2024 | Robert John Andrew Ryan | Common Stock | A | 2,550 | $1.92 | 521,259 | D | P |
| 17 Jan, 2024 | Robert John Andrew Ryan | Common Stock | A | 100 | $1.91 | 521,359 | D | P |
| 25 Jan, 2024 | Robert John Andrew Ryan | Common Stock | A | 100 | $2.54 | 521,459 | D | P |
| 29 Jan, 2024 | Robert John Andrew Ryan | Common Stock | A | 15,596 | $2.35 | 537,055 | D | P |
| 30 Dec, 2022 | Robert Ainscow | Common Stock | A | 50,000 | $0.00 | 900,000 | D | A |
| 15 Nov, 2022 | Joshua Jay Donfeld | Common Stock | A | 200,000 | $0.00 | 1,000,000 | D | A |
| 15 Nov, 2022 | Hendrik Strydom | Common Stock | A | 200,000 | $0.00 | 3,797,423 | I | A |
| 15 Nov, 2022 | Todd Wider | Common Stock | A | 200,000 | $0.00 | 400,000 | D | A |
| 15 Nov, 2022 | Robert Ainscow | Common Stock | A | 600,000 | $0.00 | 850,000 | D | A |
| 15 Nov, 2022 | Duncan Moore | Common Stock | A | 200,000 | $0.00 | 400,000 | D | A |
| 15 Nov, 2022 | Sergey Vasnetsov | Common Stock | A | 600,000 | $0.00 | 2,800,000 | I | A |