| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
10% Owner
1 company
Scully William P is a 10% Owner at PRTA. Recent filings cover 23 purchases and 0 sales. Those positions are worth an estimated $8.8M at current prices.
Our model assigns Scully William P a below-average insider score of 29/100, based on 4 past trades. Over a 12-month horizon, 0.0% of those trades were profitable, with an average 12-month return of -29.9%.
Scully William P's largest disclosed position is in PRTA as 10% Owner, worth about $8.8M. Net of sales, the recent Form 4 record there shows accumulation of 1,457,436 shares.
| Date | Ticker | Role | Type | Shares | Price | Value | Chg% | 3M | 12M | SEC |
|---|---|---|---|---|---|---|---|---|---|---|
| Jun 11, 2026 | PRTA Prothena Corporation Plc | 10% Owner | Buy | 125,000 | $8.17 | $1,021,225.00 | +13.4% | - | - | |
| Jun 4, 2026 | PRTA Prothena Corporation Plc | 10% Owner | Buy | 50,000 | $9.31 | $465,295.00 | +5.6% | - | - | |
| Jun 2, 2026 | PRTA Prothena Corporation Plc | 10% Owner | Buy | 50,000 | $9.43 | $471,300.00 | +6.0% | - | - | |
| May 22, 2026 | PRTA Prothena Corporation Plc | 10% Owner | Buy | 100,000 | $9.81 | $981,300.00 | +13.6% | - | - | |
| Jan 14, 2025 | PRTA Prothena Corp Public Ltd Co | 10% Owner | Buy | 207,436 | $13.26 | $2,749,916.18 | +39.2% | -21.5% | -27.4% |