William P Scully Insider Trading Activity
William P Scully has been net-buying over the last 12 months with 6 purchases and 0 sales across 1 company.
PRTA is the most-traded position with 6 trades. The largest single transaction was a purchase of PRTA for $981K on May 22, 2026.
Performance Scorecard
Forward stock performance after each transaction by William P Scully. Buy returns measure price movement after open-market purchases; sell-avoided measures the loss avoided after open-market sales. Success rate counts trades where the insider's direction was right.
| PERIOD | AVG BUY RETURN | AVG SELL AVOIDED | SUCCESS RATE | TRADES |
|---|---|---|---|---|
| 30 days | +1.1% | — | 67% | 3 |
| 90 days | -8.0% | — | 0% | 1 |
| 120 days | — | — | — | — |
Performance based on stock price movement after each transaction date. Past results do not predict future returns. Not financial advice.
Price & Trades
Pro: Trade MarkersPRTA · PROTHENA CORP PUBLIC LTD CO
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Upgrade to ProRecent Trades
| DATE | TICKER | TYPE | SHARES | PRICE | VALUE | Δ OWNED | ROLE | FILING |
|---|---|---|---|---|---|---|---|---|
Aug 20, 2026 | PRTA | Buy | 50,000 | $8.79 | $439K | +6.7% | 10%+ Owner | |
Aug 7, 2026 | PRTA | Buy | 34,000 | $8.62 | $293K | +4.5% | 10%+ Owner | |
Aug 7, 2026 | PRTA | Buy | 3,500 | $8.62 | $30K | +4.4% | 10%+ Owner | |
Jun 16, 2026 | PRTA | Buy | 20,000 | $7.90 | $158K | +2.7% | 10%+ Owner | |
Jun 2, 2026 | PRTA | Buy | 50,000 | $9.43 | $471K | +6.0% | 10%+ Owner | |
May 22, 2026 | PRTA | Buy | 100,000 | $9.81 | $981K | +13.6% | 10%+ Owner |
Top Companies Traded
| TICKER | COMPANY | TRADES | TOTAL VOLUME |
|---|---|---|---|
| PRTA | PROTHENA CORP PUBLIC LTD CO | 6 | $2.4M |