PRTA's three largest insider shareholders as of April 17, 2026 are Capital, Llc Ecor1 (TenPercentOwner, 11.58Mn shares), Capital, Llc Ecor1 (TenPercentOwner, 11.58Mn shares), Capital, Llc Ecor1 (TenPercentOwner, 5.30Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Capital, Llc Ecor1 | - | 0 | 11,584,280 | 06 May, 2022 |
| Capital, Llc Ecor1 | - | 0 | 11,584,280 | 12 Jan, 2022 |
| Capital, Llc Ecor1 | - | 0 | 5,304,596 | 06 May, 2025 |
| Gene G. Kinney | President And Ceo | 152,793 | 0 | 30 Jul, 2025 |
| Brandon S. Smith | Chief Operating Officer | 130,000 | 0 | 30 Jul, 2025 |
| Brandon S. Smith | Chief Operating Officer | 130,000 | 0 | 30 Jul, 2025 |
| Tran Nguyen | Chief Strategy Officer And Cfo | 97,205 | 0 | 30 Jul, 2025 |
| Chad J. Swanson | Chief Development Officer | 85,000 | 0 | 30 Jul, 2025 |
| Wagner M. Zago | Chief Scientific Officer | 85,000 | 0 | 30 Jul, 2025 |
| Chad J. Swanson | Chief Development Officer | 85,000 | 0 | 30 Jul, 2025 |
| Wagner M. Zago | Chief Scientific Officer | 85,000 | 0 | 30 Jul, 2025 |
| Michael J Malecek | Chief Legal Officer | 80,000 | 0 | 30 Jul, 2025 |
| Karin L Walker | Chief Accounting Officer | 25,000 | 0 | 30 Jul, 2025 |
| Karin L Walker | Chief Accounting Officer | 25,000 | 0 | 30 Jul, 2025 |
| Dennis J. Selkoe | - | 2,845 | 0 | 03 Jul, 2023 |
| Dennis J. Selkoe | - | 2,845 | 0 | 03 Jul, 2023 |
| Richard T Collier | - | 1,219 | 0 | 05 Jan, 2023 |
| Lars Ekman | - | 243 | 0 | 05 Jan, 2023 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 10 Apr, 2026 | Anne Evans Kingston | Stock Option (Right to Buy) | A | 100,000 | $0.00 | 100,000 | D | A |
| 03 Mar, 2026 | Brandon S. Smith | Stock Option (Right to Buy) | A | 190,000 | $0.00 | 190,000 | D | A |
| 03 Mar, 2026 | Tran Nguyen | Stock Option (Right to Buy) | A | 230,000 | $0.00 | 230,000 | D | A |
| 03 Mar, 2026 | Gene G. Kinney | Stock Option (Right to Buy) | A | 520,000 | $0.00 | 520,000 | D | A |
| 03 Mar, 2026 | Wagner M. Zago | Stock Option (Right to Buy) | A | 190,000 | $0.00 | 190,000 | D | A |
| 03 Mar, 2026 | Karin L Walker | Stock Option (Right to Buy) | A | 150,000 | $0.00 | 150,000 | D | A |
| 03 Mar, 2026 | Chad J. Swanson | Stock Option (Right to Buy) | A | 190,000 | $0.00 | 190,000 | D | A |
| 03 Mar, 2026 | Michael J Malecek | Stock Option (Right to Buy) | A | 190,000 | $0.00 | 190,000 | D | A |
| 28 Jul, 2025 | Michael J Malecek | Ordinary Shares, par value $0.01 per share | A | 80,000 | $0.00 | 80,000 | D | A |
| 28 Jul, 2025 | Gene G. Kinney | Ordinary Shares, par value $0.01 per share | A | 140,000 | $0.00 | 152,793 | D | A |
| 28 Jul, 2025 | Chad J. Swanson | Ordinary Shares, par value $0.01 per share | A | 85,000 | $0.00 | 85,000 | D | A |
| 28 Jul, 2025 | Tran Nguyen | Ordinary Shares, par value $0.01 per share | A | 95,000 | $0.00 | 97,205 | D | A |
| 28 Jul, 2025 | Karin L Walker | Ordinary Shares, par value $0.01 per share | A | 25,000 | $0.00 | 25,000 | D | A |
| 28 Jul, 2025 | Wagner M. Zago | Ordinary Shares, par value $0.01 per share | A | 85,000 | $0.00 | 85,000 | D | A |
| 28 Jul, 2025 | Brandon S. Smith | Ordinary Shares, par value $0.01 per share | A | 130,000 | $0.00 | 130,000 | D | A |
| 14 May, 2025 | Richard T Collier | Stock Option (Right to Buy) | A | 20,183 | $0.00 | 20,183 | D | A |
| 14 May, 2025 | William H. Jr. Dunn | Stock Option (Right to Buy) | A | 20,183 | $0.00 | 20,183 | D | A |
| 14 May, 2025 | Helen Susan Kim | Stock Option (Right to Buy) | A | 20,183 | $0.00 | 20,183 | D | A |
| 14 May, 2025 | Lars Ekman | Stock Option (Right to Buy) | A | 20,183 | $0.00 | 20,183 | D | A |
| 14 May, 2025 | Dennis J. Selkoe | Stock Option (Right to Buy) | A | 20,183 | $0.00 | 20,183 | D | A |