Scully William P: insider buys
Every open-market stock purchase reported by Scully William P to the SEC on Form 4.
Total bought$12.08M
Purchases15
Companies1
Last purchase filedOct 26, 2026
Return on these buys-1.8%
Scully William P has made 15 open-market purchases worth $12.08M in 1 company since May 26, 2026, according to SEC Form 4 filings. The most recent was filed on Oct 26, 2026: 150,000 shares of PRTA at $8.15 (10% Owner), worth $1.22M. The largest was $1.82M of PRTA on Oct 7, 2026. Taken together, these purchases are down 2% at the latest closing prices (split-adjusted, weighted by amount).
Companies Scully William P bought
| Ticker | Company | Role | Buys | Total | Since buy | Last filed |
|---|---|---|---|---|---|---|
| PRTA | Prothena Corp Public Ltd Co | 10% Owner | 15 | $12.08M | -1.8% | Oct 26 |
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| Filed | Stock | Insider | Value | Shares | Price | Since buy | Stake | Trade | |
|---|---|---|---|---|---|---|---|---|---|
| Oct 26 | PRTAProthena Corp Public Ltd Co | Scully William P10% Owner | $1.22M | 150,000 | $8.15 | +4.0% | +14% | Oct 22 | SEC |
| Oct 15 | PRTAProthena Corp Public Ltd Co | Scully William P10% Owner | $920.05K | 110,000 | $8.36 | +1.3% | +12% | Oct 13 | SEC |
| Oct 9 | PRTAProthena Corp Public Ltd Co | Scully William P10% Owner | $1.82M | 215,000 | $8.47 | +0.0% | +68% | Oct 7 | SEC |
| Oct 6 | PRTAProthena Corp Public Ltd Co | Scully William P10% Owner | $857.24K | 100,000 | $8.57 | -1.2% | +47% | Oct 2 | SEC |
| Sep 30 | PRTAProthena Corp Public Ltd Co | Scully William P10% Owner | $1.41M | 162,000 | $8.68 | -2.4% | +312% | Sep 29 | SEC |
| Sep 29 | PRTAProthena Corp Public Ltd Co | Scully William P10% Owner | $890.10K | 103,500 | $8.60 | -1.5% | +124% | Sep 28 | SEC |
| Sep 21 | PRTAProthena Corp Public Ltd Co | Scully William P10% Owner | $843K | 100,000 | $8.43 | +0.5% | +12% | Sep 18 | SEC |
| Sep 3 | PRTAProthena Corp Public Ltd Co | Scully William P10% Owner | $255.69K | 27,000 | $9.47 | -11% | +3% | Sep 2 | SEC |
| Aug 21 | PRTAProthena Corp Public Ltd Co | Scully William P10% Owner | $439.50K | 50,000 | $8.79 | -3.6% | +7% | Aug 20 | SEC |
| Aug 10 | PRTAProthena Corp Public Ltd Co | Scully William P10% Owner | $323.25K | 37,500 | $8.62 | -1.7% | +5% | Aug 7 | SEC |
| Jun 18 | PRTAProthena Corp Public Ltd Co | Scully William P10% Owner | $158K | 20,000 | $7.90 | +7.2% | +3% | Jun 16 | SEC |
| Jun 12 | PRTAProthena Corp Public Ltd Co | Scully William P10% Owner | $1.02M | 125,000 | $8.17 | +3.7% | +13% | Jun 11 | SEC |
| Jun 5 | PRTAProthena Corp Public Ltd Co | Scully William P10% Owner | $465.50K | 50,000 | $9.31 | -9.0% | +6% | Jun 4 | SEC |
| Jun 3 | PRTAProthena Corp Public Ltd Co | Scully William P10% Owner | $471.50K | 50,000 | $9.43 | -10% | +6% | Jun 2 | SEC |
| May 26 | PRTAProthena Corp Public Ltd Co | Scully William P10% Owner | $981K | 100,000 | $9.81 | -14% | +14% | May 22 | SEC |