PRTA PROTHENA CORP PUBLIC LTD CO
Nasdaq · SEC CIK 1559053 · EDGAR
- Bought, last 12 months
- $4.96M 10 purchases by 1 insiders
- Sold, last 12 months
- $136.0K 2 sales by 2 insiders
- Filings on record
- 215 since 2021-07-12, latest 2026-09-21 16:23
BoughtSold
Most active insiders, 12 months
| Insider | Title | Bought | Sold |
|---|---|---|---|
| SCULLY WILLIAM P | 10% | $4.96M | — |
| Isaacs Michael John | GC, Company Sec | — | $71.1K |
| Kingston Anne Evans | Chief Strategy Off | — | $64.9K |
| Swanson Chad J. | Chief Development Off | — | — |
| Smith Brandon S. | COO | — | — |
| Zago Wagner M. | CSO | — | — |
| Kinney Gene G. | Pres, CEO, Dir | — | — |
| Walker Karin L | CAO | — | — |
| Nguyen Tran | CFO, Chief Strategy Off | — | — |
Transactions 243
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-09-21 16:23 | 2026-09-18 | PRTA | SCULLY WILLIAM P | 10% | P - Purchase | $8.43 | +100.0K | 927.0K | +12% | +$843.5K | |
| 2026-09-03 18:23 | 2026-09-02 | PRTA | SCULLY WILLIAM P | 10% | P - Purchase | $9.47 | +27.0K | 827.0K | +3% | +$255.7K | |
| 2026-08-21 14:32 | 2026-08-20 | PRTA | SCULLY WILLIAM P | 10% | P - Purchase | $8.79 | +50.0K | 800.0K | +7% | +$439.4K | |
| M | 2026-08-18 16:03 | 2026-08-17+ | PRTA | SCULLY WILLIAM P | 10% | G - Gift | $0.00 | -291.6K | 750.0K | -28% | $0 |
| 2026-08-11 16:08 | 2026-08-10 | PRTA | SCULLY WILLIAM P | 10% | G - Gift | $0.00 | +251.6K | 1.04M | +32% | $0 | |
| 2026-08-10 15:24 | 2026-08-07 | PRTA | SCULLY WILLIAM P | 10% | P - Purchase | $8.62 | +34.0K | 790.0K | +4% | +$293.1K | |
| I | 2026-08-10 15:24 | 2026-08-07 | PRTA | SCULLY WILLIAM P | 10% | P - Purchase | $8.62 | +3,500 | 83.5K | +4% | +$30.2K |
| D | 2026-07-30 20:34 | 2026-07-28 | PRTA | Zago Wagner M. | CSO | M - OptEx | — | +51.0K | 85.0K | +150% | — |
| D | 2026-07-30 20:34 | 2026-07-28 | PRTA | Zago Wagner M. | CSO | D - Sale to Iss | $8.56 | -51.0K | 34.0K | -60% | -$436.6K |
| D | 2026-07-30 20:34 | 2026-07-28 | PRTA | Walker Karin L | CAO | M - OptEx | — | +15.0K | 25.0K | +150% | — |
| D | 2026-07-30 20:34 | 2026-07-28 | PRTA | Walker Karin L | CAO | D - Sale to Iss | $8.56 | -15.0K | 10.0K | -60% | -$128.4K |
| D | 2026-07-30 20:33 | 2026-07-28 | PRTA | Swanson Chad J. | Chief Development Off | M - OptEx | — | +51.0K | 85.0K | +150% | — |
| D | 2026-07-30 20:33 | 2026-07-28 | PRTA | Swanson Chad J. | Chief Development Off | D - Sale to Iss | $8.56 | -40.8K | 44.2K | -48% | -$349.2K |
| D | 2026-07-30 20:33 | 2026-07-28 | PRTA | Swanson Chad J. | Chief Development Off | F - Tax | $8.56 | -3,467 | 40.7K | -8% | -$29.7K |
| D | 2026-07-30 20:33 | 2026-07-28 | PRTA | Smith Brandon S. | COO | M - OptEx | — | +78.0K | 130.0K | +150% | — |
| D | 2026-07-30 20:33 | 2026-07-28 | PRTA | Smith Brandon S. | COO | D - Sale to Iss | $8.56 | -78.0K | 52.0K | -60% | -$667.7K |
| D | 2026-07-30 20:32 | 2026-07-28 | PRTA | Nguyen Tran | CFO, Chief Strategy Off | M - OptEx | — | +57.0K | 97.2K | +142% | — |
| D | 2026-07-30 20:32 | 2026-07-28 | PRTA | Nguyen Tran | CFO, Chief Strategy Off | D - Sale to Iss | $8.56 | -57.0K | 40.2K | -59% | -$487.9K |
| D | 2026-07-30 20:31 | 2026-07-28 | PRTA | Kinney Gene G. | Pres, CEO, Dir | M - OptEx | — | +84.0K | 152.8K | +122% | — |
| D | 2026-07-30 20:31 | 2026-07-28 | PRTA | Kinney Gene G. | Pres, CEO, Dir | D - Sale to Iss | $8.56 | -84.0K | 68.8K | -55% | -$719.0K |
| T | 2026-07-30 20:31 | 2026-07-28 | PRTA | Kingston Anne Evans | Chief Strategy Off | F - Tax | $8.56 | -3,498 | 63.4K | -5% | -$29.9K |
| T | 2026-07-30 20:31 | 2026-07-29 | PRTA | Kingston Anne Evans | Chief Strategy Off | S - Sale | $8.47 | -7,662 | 55.8K | -12% | -$64.9K |
| T | 2026-07-30 20:30 | 2026-07-28 | PRTA | Isaacs Michael John | GC, Company Sec | F - Tax | $8.56 | -4,694 | 44.1K | -10% | -$40.2K |
| T | 2026-07-30 20:30 | 2026-07-29 | PRTA | Isaacs Michael John | GC, Company Sec | S - Sale | $8.47 | -8,386 | 35.7K | -19% | -$71.1K |
| 2026-06-18 11:38 | 2026-06-16 | PRTA | SCULLY WILLIAM P | 10% | P - Purchase | $7.90 | +20.0K | 756.0K | +3% | +$158.0K | |
| 2026-06-16 16:58 | 2026-06-15 | PRTA | SCULLY WILLIAM P | 10% | G - Gift | $0.00 | -325.0K | 736.0K | -31% | $0 | |
| 2026-06-12 17:59 | 2026-06-11 | PRTA | SCULLY WILLIAM P | 10% | P - Purchase | $8.17 | +125.0K | 1.06M | +13% | +$1.02M | |
| 2026-06-05 13:46 | 2026-06-04 | PRTA | SCULLY WILLIAM P | 10% | P - Purchase | $9.31 | +50.0K | 936.0K | +6% | +$465.3K | |
| 2026-06-03 12:41 | 2026-06-02 | PRTA | SCULLY WILLIAM P | 10% | P - Purchase | $9.43 | +50.0K | 886.0K | +6% | +$471.3K | |
| 2026-05-26 14:51 | 2026-05-22 | PRTA | SCULLY WILLIAM P | 10% | P - Purchase | $9.81 | +100.0K | 836.0K | +14% | +$981.3K | |
| 2025-07-30 | 2025-07-28 | PRTA | Swanson Chad J. | Chief Development Off | A - Grant | $0.00 | +85.0K | 85.0K | New | $0 | |
| 2025-07-30 | 2025-07-28 | PRTA | Malecek Michael J | CLO | A - Grant | $0.00 | +80.0K | 80.0K | New | $0 | |
| 2025-07-30 | 2025-07-28 | PRTA | Nguyen Tran | CFO, Chief Strategy Off | A - Grant | $0.00 | +95.0K | 97.2K | +4,308% | $0 | |
| 2025-07-30 | 2025-07-28 | PRTA | Zago Wagner M. | CSO | A - Grant | $0.00 | +85.0K | 85.0K | New | $0 | |
| 2025-07-30 | 2025-07-28 | PRTA | Kinney Gene G. | Pres, CEO, Dir | A - Grant | $0.00 | +140.0K | 152.8K | +1,094% | $0 | |
| 2025-07-30 | 2025-07-28 | PRTA | Walker Karin L | CAO | A - Grant | $0.00 | +25.0K | 25.0K | New | $0 | |
| 2025-07-30 | 2025-07-28 | PRTA | Smith Brandon S. | COO | A - Grant | $0.00 | +130.0K | 130.0K | New | $0 | |
| MI | 2025-05-06 | 2025-05-02+ | PRTA | EcoR1 Capital, LLC | 10% | S - Sale | $8.09 | -6.28M | 5.30M | -54% | -$50.83M |
| M | 2025-05-02 | 2024-12-18+ | PRTA | SCULLY WILLIAM P | 10% | G - Gift | $0.00 | -265.7K | 637.0K | -29% | $0 |
| M | 2025-05-02 | 2024-12-18+ | PRTA | SCULLY WILLIAM P | 10% | P - Purchase | $13.26 | +207.4K | 1.30M | +19% | +$2.75M |
| MI | 2025-05-02 | 2024-12-20+ | PRTA | SCULLY WILLIAM P | 10% | G - Gift | $0.00 | -52.0K | 47.0K | -53% | $0 |
| 2025-02-14 | 2020-04-08 | PRTA | Nguyen Tran | CFO, Chief Strategy Off | J - Other | $0.00 | -995 | 2,205 | -31% | $0 | |
| DT | 2024-01-24 | 2024-01-24 | PRTA | Walker Karin L | CAO | S - Sale+OE | $34.00 | -5,000 | 0 | -100% | -$170.0K |
| DT | 2024-01-24 | 2024-01-24 | PRTA | Walker Karin L | CAO | M - OptEx | $13.53 | +5,000 | 5,000 | New | +$67.7K |
| DMT | 2023-12-20 | 2023-12-20 | PRTA | Walker Karin L | CAO | S - Sale+OE | $37.19 | -5,000 | 0 | -100% | -$186.0K |
| DT | 2023-12-20 | 2023-12-20 | PRTA | Walker Karin L | CAO | M - OptEx | $13.53 | +5,000 | 5,000 | New | +$67.7K |
| DT | 2023-11-30 | 2023-11-30 | PRTA | Walker Karin L | CAO | S - Sale+OE | $34.00 | -5,000 | 0 | -100% | -$170.0K |
| DT | 2023-11-30 | 2023-11-30 | PRTA | Walker Karin L | CAO | M - OptEx | $13.53 | +5,000 | 5,000 | New | +$67.7K |
| DMT | 2023-10-25 | 2023-10-25 | PRTA | Walker Karin L | CAO | S - Sale+OE | $41.04 | -5,000 | 294 | -94% | -$205.2K |
| DT | 2023-10-25 | 2023-10-25 | PRTA | Walker Karin L | CAO | M - OptEx | $13.53 | +5,000 | 5,000 | New | +$67.7K |
| DMT | 2023-10-11 | 2023-10-11 | PRTA | Smith Brandon S. | COO | S - Sale+OE | $46.74 | -4,000 | 444 | -90% | -$187.0K |
| DT | 2023-10-11 | 2023-10-11 | PRTA | Smith Brandon S. | COO | M - OptEx | $11.12 | +4,000 | 4,000 | New | +$44.5K |
| DMT | 2023-10-04 | 2023-10-04 | PRTA | Karp Carol D. | Chief Regulatory Off | S - Sale+OE | $46.61 | -5,000 | 663 | -88% | -$233.1K |
| DT | 2023-10-04 | 2023-10-04 | PRTA | Karp Carol D. | Chief Regulatory Off | M - OptEx | $12.15 | +5,000 | 5,000 | New | +$60.8K |
| DMT | 2023-09-27 | 2023-09-27 | PRTA | Malecek Michael J | CLO | S - Sale+OE | $47.37 | -5,000 | 0 | -100% | -$236.9K |
| DT | 2023-09-27 | 2023-09-27 | PRTA | Malecek Michael J | CLO | M - OptEx | $10.27 | +5,000 | 5,000 | New | +$51.4K |
| DT | 2023-09-19 | 2023-09-19 | PRTA | Walker Karin L | CAO | M - OptEx | $15.04 | +5,000 | 5,000 | New | +$75.2K |
| DT | 2023-09-19 | 2023-09-19 | PRTA | Walker Karin L | CAO | S - Sale+OE | $52.36 | -5,000 | 0 | -100% | -$261.8K |
| DMT | 2023-09-13 | 2023-09-13 | PRTA | Smith Brandon S. | COO | S - Sale+OE | $55.49 | -4,000 | 0 | -100% | -$222.0K |
| DT | 2023-09-13 | 2023-09-13 | PRTA | Smith Brandon S. | COO | M - OptEx | $11.12 | +4,000 | 4,000 | New | +$44.5K |
| DT | 2023-09-13 | 2023-09-13 | PRTA | Garren Hideki | Chief Medical Off | M - OptEx | $24.90 | +2,000 | 2,000 | New | +$49.8K |
| DT | 2023-09-13 | 2023-09-13 | PRTA | Garren Hideki | Chief Medical Off | S - Sale+OE | $55.48 | -2,000 | 0 | -100% | -$111.0K |
| DT | 2023-09-06 | 2023-09-06 | PRTA | Karp Carol D. | Chief Regulatory Off | M - OptEx | $12.15 | +5,000 | 5,000 | New | +$60.8K |
| DMT | 2023-09-06 | 2023-09-06 | PRTA | Karp Carol D. | Chief Regulatory Off | S - Sale+OE | $54.76 | -5,000 | 6 | -100% | -$273.8K |
| DMT | 2023-08-30 | 2023-08-30 | PRTA | Malecek Michael J | CLO | S - Sale+OE | $55.02 | -5,000 | 14 | -100% | -$275.1K |
| DT | 2023-08-30 | 2023-08-30 | PRTA | Malecek Michael J | CLO | M - OptEx | $10.27 | +5,000 | 5,000 | New | +$51.4K |
| DT | 2023-08-18 | 2023-08-18 | PRTA | Walker Karin L | CAO | M - OptEx | $15.04 | +5,000 | 5,000 | New | +$75.2K |
| DT | 2023-08-18 | 2023-08-18 | PRTA | Walker Karin L | CAO | S - Sale+OE | $57.18 | -5,000 | 0 | -100% | -$285.9K |
| DMT | 2023-08-16 | 2023-08-16 | PRTA | Garren Hideki | Chief Medical Off | S - Sale+OE | $58.74 | -2,000 | 0 | -100% | -$117.5K |
| DT | 2023-08-16 | 2023-08-16 | PRTA | Garren Hideki | Chief Medical Off | M - OptEx | $24.90 | +2,000 | 2,000 | New | +$49.8K |
| DT | 2023-08-16 | 2023-08-16 | PRTA | Smith Brandon S. | COO | M - OptEx | $11.12 | +4,000 | 4,000 | New | +$44.5K |
| DMT | 2023-08-16 | 2023-08-16 | PRTA | Smith Brandon S. | COO | S - Sale+OE | $58.71 | -4,000 | 0 | -100% | -$234.8K |
| DT | 2023-08-02 | 2023-08-02 | PRTA | Karp Carol D. | Chief Regulatory Off | M - OptEx | $12.15 | +5,000 | 5,000 | New | +$60.8K |
| DMT | 2023-08-02 | 2023-08-02 | PRTA | Karp Carol D. | Chief Regulatory Off | S - Sale+OE | $67.02 | -5,000 | 0 | -100% | -$335.1K |
| DMT | 2023-08-02 | 2023-08-02 | PRTA | Zago Wagner M. | CSO | S - Sale+OE | $67.04 | -4,000 | 229 | -95% | -$268.2K |
| DT | 2023-08-02 | 2023-08-02 | PRTA | Zago Wagner M. | CSO | M - OptEx | $12.15 | +4,000 | 4,000 | New | +$48.6K |
| DMT | 2023-07-26 | 2023-07-26 | PRTA | Malecek Michael J | CLO | S - Sale+OE | $62.33 | -5,000 | 620 | -89% | -$311.6K |
| DT | 2023-07-26 | 2023-07-26 | PRTA | Malecek Michael J | CLO | M - OptEx | $10.27 | +5,000 | 5,000 | New | +$51.4K |
| DMT | 2023-07-19 | 2023-07-19 | PRTA | Walker Karin L | CAO | S - Sale+OE | $69.19 | -5,000 | 1,034 | -83% | -$346.0K |
| DT | 2023-07-19 | 2023-07-19 | PRTA | Walker Karin L | CAO | M - OptEx | $15.04 | +5,000 | 5,000 | New | +$75.2K |
| DMT | 2023-07-12 | 2023-07-12 | PRTA | Smith Brandon S. | COO | S - Sale+OE | $67.51 | -4,000 | 0 | -100% | -$270.0K |
| DT | 2023-07-12 | 2023-07-12 | PRTA | Smith Brandon S. | COO | M - OptEx | $11.12 | +4,000 | 4,000 | New | +$44.5K |
| DMT | 2023-07-12 | 2023-07-12 | PRTA | Garren Hideki | Chief Medical Off | S - Sale+OE | $67.51 | -2,000 | 92 | -96% | -$135.0K |
| DT | 2023-07-12 | 2023-07-12 | PRTA | Garren Hideki | Chief Medical Off | M - OptEx | $24.90 | +2,000 | 2,000 | New | +$49.8K |
| DMT | 2023-07-05 | 2023-07-05 | PRTA | Karp Carol D. | Chief Regulatory Off | S - Sale+OE | $68.13 | -5,000 | 0 | -100% | -$340.6K |
| DT | 2023-07-05 | 2023-07-05 | PRTA | Karp Carol D. | Chief Regulatory Off | M - OptEx | $12.15 | +5,000 | 5,000 | New | +$60.8K |
| DMT | 2023-07-05 | 2023-07-05 | PRTA | Zago Wagner M. | CSO | S - Sale+OE | $68.16 | -4,000 | 1,009 | -80% | -$272.6K |
| DT | 2023-07-05 | 2023-07-05 | PRTA | Zago Wagner M. | CSO | M - OptEx | $12.15 | +4,000 | 4,000 | New | +$48.6K |
| DT | 2023-07-03 | 2023-07-03 | PRTA | Selkoe Dennis J. | Dir | M - OptEx | $11.33 | +5,000 | 7,845 | +176% | +$56.6K |
| DT | 2023-07-03 | 2023-07-03 | PRTA | Selkoe Dennis J. | Dir | S - Sale+OE | $67.43 | -5,000 | 2,845 | -64% | -$337.2K |
| DMT | 2023-06-28 | 2023-06-28 | PRTA | Malecek Michael J | CLO | S - Sale+OE | $69.82 | -5,000 | 3,760 | -57% | -$349.1K |
| DT | 2023-06-28 | 2023-06-28 | PRTA | Malecek Michael J | CLO | M - OptEx | $10.27 | +5,000 | 5,000 | New | +$51.4K |
| DT | 2023-06-20 | 2023-06-20 | PRTA | Walker Karin L | CAO | M - OptEx | $15.04 | +5,000 | 5,000 | New | +$75.2K |
| DMT | 2023-06-20 | 2023-06-20 | PRTA | Walker Karin L | CAO | S - Sale+OE | $68.90 | -5,000 | 3,000 | -62% | -$344.5K |
| DT | 2023-06-16 | 2023-06-16 | PRTA | Garren Hideki | Chief Medical Off | M - OptEx | $24.90 | +7,331 | 7,331 | New | +$182.5K |
| DT | 2023-06-16 | 2023-06-16 | PRTA | Garren Hideki | Chief Medical Off | S - Sale+OE | $74.00 | -7,331 | 0 | -100% | -$542.5K |
| DMT | 2023-06-14 | 2023-06-14 | PRTA | Smith Brandon S. | COO | S - Sale+OE | $73.98 | -5,333 | 1,362 | -80% | -$394.6K |
| DT | 2023-06-14 | 2023-06-14 | PRTA | Smith Brandon S. | COO | M - OptEx | $11.12 | +5,333 | 5,333 | New | +$59.3K |
| DMT | 2023-06-14 | 2023-06-14 | PRTA | Garren Hideki | Chief Medical Off | S - Sale+OE | $74.22 | -4,669 | 4,160 | -53% | -$346.5K |
| DT | 2023-06-14 | 2023-06-14 | PRTA | Garren Hideki | Chief Medical Off | M - OptEx | $24.90 | +4,669 | 4,669 | New | +$116.3K |
Purchase Sale Sale after option exercise All abbreviations