As of March 23, 2026, Plus Therapeutics's top three insider holders are Marc H Hedrick (Chief Executive Officer, 339.79K shares), Robert P Lenk (Director, 139.33K shares), Andrew John Hugh Macintyre Sims (Chief Financial Officer, 106.46K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Marc H Hedrick | Chief Executive Officer | 339,787 | 0 | 02 Jan, 2026 |
| Robert P Lenk | 139,327 | 0 | 25 Aug, 2025 | |
| Andrew John Hugh Macintyre Sims | Chief Financial Officer | 106,461 | 0 | 02 Jan, 2026 |
| Greg Petersen | 48,921 | 0 | 13 Sep, 2024 | |
| Howard Clowes | 26,497 | 0 | 13 Sep, 2024 | |
| Richard J Hawkins | 15,188 | 0 | 17 Sep, 2024 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 25 Feb, 2026 | Marc H Hedrick | Restricted Stock Units | A | 2,419,582 | $0.00 | 4,016,388 | D | A |
| 25 Feb, 2026 | Andrew John Hugh Macintyre Sims | Restricted Stock Units | A | 349,542 | $0.00 | 732,774 | D | A |
| 25 Feb, 2026 | Andrew John Hugh Macintyre Sims | Stock Option (Right to Buy) | A | 349,541 | $0.00 | 349,541 | D | A |
| 25 Feb, 2026 | Marc H Hedrick | Stock Option (Right to Buy) | A | 2,419,582 | $0.00 | 2,419,582 | D | A |
| 01 Jan, 2026 | Andrew John Hugh Macintyre Sims | Common Stock | A | 38,323 | $0.00 | 106,461 | D | M |
| 01 Jan, 2026 | Marc H Hedrick | Common Stock | A | 159,681 | $0.00 | 339,787 | D | M |
| 01 Jan, 2026 | Andrew John Hugh Macintyre Sims | Restricted Stock Units | D | 38,323 | $0.00 | 383,232 | D | M |
| 01 Jan, 2026 | Marc H Hedrick | Restricted Stock Units | D | 159,681 | $0.00 | 1,596,806 | D | M |
| 04 Nov, 2025 | Andrew John Hugh Macintyre Sims | Common Stock | A | 20,000 | $0.51 | 68,138 | D | P |
| 01 Oct, 2025 | Andrew John Hugh Macintyre Sims | Common Stock | A | 38,323 | $0.00 | 48,138 | D | M |
| 13 Aug, 2025 | Andrew John Hugh Macintyre Sims | Stock Option (Right to Buy) | A | 1,379,636 | $0.00 | 1,379,636 | D | A |
| 01 Oct, 2025 | Marc H Hedrick | Common Stock | A | 159,681 | $0.00 | 180,106 | D | M |
| 13 Aug, 2025 | Marc H Hedrick | Stock Option (Right to Buy) | A | 5,748,506 | $0.00 | 5,748,506 | D | A |
| 13 Aug, 2025 | Andrew John Hugh Macintyre Sims | Restricted Stock Units | A | 459,878 | $0.00 | 459,878 | D | A |
| 01 Oct, 2025 | Marc H Hedrick | Restricted Stock Units | D | 159,681 | $0.00 | 1,756,487 | D | M |
| 13 Aug, 2025 | Marc H Hedrick | Restricted Stock Units | A | 1,916,168 | $0.00 | 1,916,168 | D | A |
| 01 Oct, 2025 | Andrew John Hugh Macintyre Sims | Restricted Stock Units | D | 38,323 | $0.00 | 421,555 | D | M |
| 22 Aug, 2025 | Robert P Lenk | Common Stock | A | 110,000 | $0.49 | 139,327 | D | P |
| 13 Aug, 2025 | Es-Johansson An Van | Stock Option (Right to Buy) | A | 297,794 | $0.00 | 297,794 | D | A |
| 13 Aug, 2025 | Andrew John Hugh Macintyre Sims | Stock Option (Right to Buy) | A | 1,379,636 | $0.00 | 1,379,636 | D | A |