# Prothena Corp Public Ltd Co (PRTA) insider trading, Q3 2026

Canonical: https://sec-api.dev/insider-trading/prta

> 27 non-derivative transactions: 7 purchases ($4.2M), 2 sales ($136K). CIK 1559053.

| Date | Insider | Relationship | Code | Shares | Price | Owned after | Filing |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 2026-09-29 | SCULLY WILLIAM P | TenPercentOwner | P | 162000.0 | 8.68 | 214000.0 | https://www.sec.gov/Archives/edgar/data/1559053/000104546326000018/0001045463-26-000018-index.htm |
| 2026-09-28 | SCULLY WILLIAM P | TenPercentOwner | P | 103500.0 | 8.6 | 187000.0 | https://www.sec.gov/Archives/edgar/data/1559053/000104546326000017/0001045463-26-000017-index.htm |
| 2026-09-18 | SCULLY WILLIAM P | TenPercentOwner | P | 100000.0 | 8.43 | 927000.0 | https://www.sec.gov/Archives/edgar/data/1559053/000104546326000016/0001045463-26-000016-index.htm |
| 2026-09-02 | SCULLY WILLIAM P | TenPercentOwner | P | 27000.0 | 9.47 | 827000.0 | https://www.sec.gov/Archives/edgar/data/1559053/000104546326000015/0001045463-26-000015-index.htm |
| 2026-08-20 | SCULLY WILLIAM P | TenPercentOwner | P | 50000.0 | 8.79 | 800000.0 | https://www.sec.gov/Archives/edgar/data/1559053/000104546326000014/0001045463-26-000014-index.htm |
| 2026-08-18 | SCULLY WILLIAM P | TenPercentOwner | G | 627553.0 | 0.0 | 750000.0 | https://www.sec.gov/Archives/edgar/data/1559053/000104546326000013/0001045463-26-000013-index.htm |
| 2026-08-17 | SCULLY WILLIAM P | TenPercentOwner | G | 336000.0 | 0.0 | 1377553.0 | https://www.sec.gov/Archives/edgar/data/1559053/000104546326000013/0001045463-26-000013-index.htm |
| 2026-08-10 | SCULLY WILLIAM P | TenPercentOwner | G | 251553.0 | 0.0 | 1041553.0 | https://www.sec.gov/Archives/edgar/data/1559053/000104546326000011/0001045463-26-000011-index.htm |
| 2026-08-07 | SCULLY WILLIAM P | TenPercentOwner | P | 3500.0 | 8.62 | 83500.0 | https://www.sec.gov/Archives/edgar/data/1559053/000104546326000010/0001045463-26-000010-index.htm |
| 2026-08-07 | SCULLY WILLIAM P | TenPercentOwner | P | 34000.0 | 8.62 | 790000.0 | https://www.sec.gov/Archives/edgar/data/1559053/000104546326000010/0001045463-26-000010-index.htm |
| 2026-07-29 | Isaacs Michael John | Officer | S | 8386.0 | 8.47 | 35745.0 | https://www.sec.gov/Archives/edgar/data/1559053/000090514826003409/0000905148-26-003409-index.htm |
| 2026-07-29 | Kingston Anne Evans | Officer | S | 7662.0 | 8.47 | 55782.0 | https://www.sec.gov/Archives/edgar/data/1559053/000090514826003410/0000905148-26-003410-index.htm |
| 2026-07-28 | Isaacs Michael John | Officer | F | 4694.0 | 8.56 | 44131.0 | https://www.sec.gov/Archives/edgar/data/1559053/000090514826003409/0000905148-26-003409-index.htm |
| 2026-07-28 | Kingston Anne Evans | Officer | F | 3498.0 | 8.56 | 63444.0 | https://www.sec.gov/Archives/edgar/data/1559053/000090514826003410/0000905148-26-003410-index.htm |
| 2026-07-28 | Kinney Gene G. | Director, Officer | M | 84000.0 |  | 152793.0 | https://www.sec.gov/Archives/edgar/data/1559053/000090514826003412/0000905148-26-003412-index.htm |
| 2026-07-28 | Kinney Gene G. | Director, Officer | D | 84000.0 | 8.56 | 68793.0 | https://www.sec.gov/Archives/edgar/data/1559053/000090514826003412/0000905148-26-003412-index.htm |
| 2026-07-28 | Nguyen Tran | Officer | M | 57000.0 |  | 97205.0 | https://www.sec.gov/Archives/edgar/data/1559053/000090514826003413/0000905148-26-003413-index.htm |
| 2026-07-28 | Nguyen Tran | Officer | D | 57000.0 | 8.56 | 40205.0 | https://www.sec.gov/Archives/edgar/data/1559053/000090514826003413/0000905148-26-003413-index.htm |
| 2026-07-28 | Smith Brandon S. | Officer | M | 78000.0 |  | 130000.0 | https://www.sec.gov/Archives/edgar/data/1559053/000090514826003414/0000905148-26-003414-index.htm |
| 2026-07-28 | Smith Brandon S. | Officer | D | 78000.0 | 8.56 | 52000.0 | https://www.sec.gov/Archives/edgar/data/1559053/000090514826003414/0000905148-26-003414-index.htm |
| 2026-07-28 | Swanson Chad J. | Officer | M | 51000.0 |  | 85000.0 | https://www.sec.gov/Archives/edgar/data/1559053/000090514826003415/0000905148-26-003415-index.htm |
| 2026-07-28 | Swanson Chad J. | Officer | F | 3467.0 | 8.56 | 40733.0 | https://www.sec.gov/Archives/edgar/data/1559053/000090514826003415/0000905148-26-003415-index.htm |
| 2026-07-28 | Swanson Chad J. | Officer | D | 40800.0 | 8.56 | 44200.0 | https://www.sec.gov/Archives/edgar/data/1559053/000090514826003415/0000905148-26-003415-index.htm |
| 2026-07-28 | Walker Karin L | Officer | D | 15000.0 | 8.56 | 10000.0 | https://www.sec.gov/Archives/edgar/data/1559053/000090514826003416/0000905148-26-003416-index.htm |
| 2026-07-28 | Walker Karin L | Officer | M | 15000.0 |  | 25000.0 | https://www.sec.gov/Archives/edgar/data/1559053/000090514826003416/0000905148-26-003416-index.htm |
| 2026-07-28 | Zago Wagner M. | Officer | D | 51000.0 | 8.56 | 34000.0 | https://www.sec.gov/Archives/edgar/data/1559053/000090514826003417/0000905148-26-003417-index.htm |
| 2026-07-28 | Zago Wagner M. | Officer | M | 51000.0 |  | 85000.0 | https://www.sec.gov/Archives/edgar/data/1559053/000090514826003417/0000905148-26-003417-index.htm |

Source: https://www.sec.gov/data-research/sec-markets-data/insider-transactions-data-sets

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