Prothena Corp Public's top three insider shareholders as of May 30, 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 |
|---|---|---|---|---|
| Richard T Collier | - | 1,219 | 0 | 05 Jan, 2023 |
| Lars Ekman | - | 243 | 0 | 05 Jan, 2023 |
| Tran Nguyen | Chief Strategy Officer And Cfo | 97,205 | 0 | 30 Jul, 2025 |
| Karin L Walker | Chief Accounting Officer | 25,000 | 0 | 30 Jul, 2025 |
| Gene G. Kinney | President And Ceo | 152,793 | 0 | 30 Jul, 2025 |
| Dennis J. Selkoe | - | 2,845 | 0 | 03 Jul, 2023 |
| Capital, Llc Ecor1 | - | 0 | 11,584,280 | 12 Jan, 2022 |
| Wagner M. Zago | Chief Scientific Officer | 85,000 | 0 | 30 Jul, 2025 |
| Michael J Malecek | Chief Legal Officer | 80,000 | 0 | 30 Jul, 2025 |
| Brandon S. Smith | Chief Operating Officer | 130,000 | 0 | 30 Jul, 2025 |
| Chad J. Swanson | Chief Development Officer | 85,000 | 0 | 30 Jul, 2025 |
* 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 |
| 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 | Wagner M. Zago | Stock Option (Right to Buy) | A | 190,000 | $0.00 | 190,000 | 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 | Michael J Malecek | 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 | Wagner M. Zago | Stock Option (Right to Buy) | A | 190,000 | $0.00 | 190,000 | 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 | Chad J. Swanson | Stock Option (Right to Buy) | A | 190,000 | $0.00 | 190,000 | 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 | Chad J. Swanson | Stock Option (Right to Buy) | A | 190,000 | $0.00 | 190,000 | 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 | Karin L Walker | Stock Option (Right to Buy) | A | 150,000 | $0.00 | 150,000 | 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 |
| 28 Jul, 2025 | Brandon S. Smith | Ordinary Shares, par value $0.01 per share | A | 130,000 | $0.00 | 130,000 | 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 | Chad J. Swanson | Ordinary Shares, par value $0.01 per share | A | 85,000 | $0.00 | 85,000 | D | A |