Prothena Corp Public's top three insider shareholders as of March 23, 2026 are Capital, Llc Ecor1 (TenPercentOwner, 5.30Mn shares), Gene G. Kinney (President And Ceo, 152.79K shares), Brandon S. Smith (Chief Operating Officer, 130.00K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| 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 |
| 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 |
| Dennis J. Selkoe | 2,845 | 0 | 03 Jul, 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 |
|---|---|---|---|---|---|---|---|---|
| 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 | 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 | 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 |
| 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 | Michael J Malecek | Ordinary Shares, par value $0.01 per share | A | 80,000 | $0.00 | 80,000 | 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 |
| 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 | Brandon S. Smith | Ordinary Shares, par value $0.01 per share | A | 130,000 | $0.00 | 130,000 | 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 |
| 14 May, 2025 | Dennis J. Selkoe | Stock Option (Right to Buy) | A | 20,183 | $0.00 | 20,183 | D | A |
| 14 May, 2025 | Daniel G Welch | 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 | Paula K Cobb | Stock Option (Right to Buy) | A | 20,183 | $0.00 | 20,183 | D | A |
| 02 May, 2025 | Capital, Llc Ecor1 | Ordinary Shares | D | 3,317,938 | $8.36 | 8,266,342 | I | S |
| 05 May, 2025 | Capital, Llc Ecor1 | Ordinary Shares | D | 977,693 | $8.11 | 7,288,649 | I | S |
| 06 May, 2025 | Capital, Llc Ecor1 | Ordinary Shares | D | 1,984,053 | $7.64 | 5,304,596 | I | S |
| 05 Mar, 2025 | Wagner M. Zago | Stock Option (Right to Buy) | A | 107,500 | $0.00 | 107,500 | D | A |