PRTA
PROTHENA CORP PUBLIC LTD CO
Latest Form 4:Purchase$439KbySCULLY WILLIAM P (10% Owner) · filed Aug 21, 2026
PROTHENA CORP PUBLIC LTD CO (PRTA) has 18 SEC Form 4 filings (29 transaction rows) in the rolling window, disclosed by 3 distinct insiders. Most recent filing: Aug 21, 2026.
The most active filer is 10% Owner SCULLY WILLIAM P with 7 filings. Insiders have net bought $3.7M over the trailing 6 months. The largest single insider purchase in this window was $1.0M by 10% Owner SCULLY WILLIAM P on Jun 11, 2026.
- Industry:Biotechnology
- CEO:Gene G. Kinney
- Employees:67
- HQ:Dublin, DU, IE
- IPO:2012-12-20
Insider Buying
$3.9M
reported purchases (SEC code P)
Insider Selling
$136K
reported sales (SEC code S)
Unique Insiders
3
in the rolling window
Market Cap
$480.0M
latest known value
| Source | ||||||
|---|---|---|---|---|---|---|
| 10% Owner | Purchase | 50,000 | $439K | Aug 21 | SEC ↗ | |
| 10% Owner | Purchase | 37,500 | $323K | Aug 10 | SEC ↗ | |
Kingston Anne EvansFirst filing | Chief Strategy Officer | Sale | 7,662 | $65K | Jul 31 | SEC ↗ |
Isaacs Michael JohnFirst filing | General Counsel & Company Sec. | Sale | 8,386 | $71K | Jul 31 | SEC ↗ |
| 10% Owner | Purchase | 20,000 | $158K | Jun 18 | SEC ↗ | |
| 10% Owner | Purchase | 125,000 | $1.0M | Jun 12 | SEC ↗ | |
| 10% Owner | Purchase | 50,000 | $465K | Jun 5 | SEC ↗ | |
| 10% Owner | Purchase | 50,000 | $471K | Jun 3 | SEC ↗ | |
SCULLY WILLIAM PFirst filing | 10% Owner | Purchase | 100,000 | $981K | May 26 | SEC ↗ |
Related companies
PROTHENA CORP PUBLIC LTD CO is in the Healthcare sector.