Insider · CIK 0001045463
William P Scully
owner
Files at PRTA (PROTHENA CORP PUBLIC LTD CO). First filing May 2, 2025, latest Oct 9, 2026.
Track record
Not enough history
Fewer than three past buys with six months of prices.
Median 6-month excess
-
after past buys, n = 0
Hit rate
-
past buys that beat the index over 6 months
Open-market trades
7 / 0
$8.8M bought, $0 sold
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
PRTA: PROTHENA CORP PUBLIC LTD CO
PRTAOct 9, 2026 · close 8.84
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 61Notable | PRTAbuy PROTHENA CORP PUBLIC LTD CO | $1.8M 215,000 shares | +68% | +7% from low-26% from high | |
| 55Moderate | PRTAbuy PROTHENA CORP PUBLIC LTD CO | $857k 100,000 shares | +47% | +6% from low-27% from high | |
| 51Moderate | PRTAbuy PROTHENA CORP PUBLIC LTD CO | $1.4M 162,000 shares | +312% | +11% from low-24% from high | |
| 49Moderate | PRTAbuy PROTHENA CORP PUBLIC LTD CO | $890k 103,500 shares | +124% | +10% from low-24% from high | |
| 52Moderate | PRTAbuy PROTHENA CORP PUBLIC LTD CO | $843k 100,000 shares | +12% | +8% from low-25% from high | |
| 20Weak | PRTAbuy PROTHENA CORP PUBLIC LTD CO | $256k 27,000 shares | +3% | - | |
| 53Moderate | PRTAbuy PROTHENA CORP PUBLIC LTD CO | $2.7M 207,436 shares | +17% | 0% from low-46% from high |
Transactions
Every row this insider has filed, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Oct 7, 2026 | PRTA PROTHENA CORP PUBLIC LTD CO | POpen-market purchase Ordinary Shares, par value $0.01 per shareindirect: By Spouse | +125,000 | $8.40 | $1.1M | 439,000 | 3 d ago |
| Oct 8, 2026 | PRTA PROTHENA CORP PUBLIC LTD CO | POpen-market purchase Ordinary Shares, par value $0.01 per shareindirect: By Spouse | +90,000 | $8.57 | $771k | 529,000 | 3 d ago |
| Oct 2, 2026 | PRTA PROTHENA CORP PUBLIC LTD CO | POpen-market purchase Ordinary Shares, par value $0.01 per shareindirect: By Spouse | +100,000 | $8.57 | $857k | 314,000 | 6 d ago |
| Sep 29, 2026 | PRTA PROTHENA CORP PUBLIC LTD CO | POpen-market purchase Ordinary Shares, par value $0.01 per shareindirect: By Spouse | +162,000 | $8.68 | $1.4M | 214,000 | 12 d ago |
| Sep 28, 2026 | PRTA PROTHENA CORP PUBLIC LTD CO | POpen-market purchase Ordinary Shares, par value $0.01 per shareindirect: By Manatee Equity Fund LLC | +103,500 | $8.60 | $890k | 187,000 | 13 d ago |
| Sep 18, 2026 | PRTA PROTHENA CORP PUBLIC LTD CO | POpen-market purchase Ordinary Shares, par value $0.01 per share | +100,000 | $8.43 | $843k | 927,000 | 21 d ago |
| Sep 2, 2026 | PRTA PROTHENA CORP PUBLIC LTD CO | POpen-market purchase Ordinary Shares, par value $0.01 per share | +27,000 | $9.47 | $256k | 827,000 | 39 d ago |
| Dec 18, 2024 | PRTA PROTHENA CORP PUBLIC LTD CO | GGift Ordinary Shares, par value $0.01 per share | +430,000 | $0.00 | $0 | 1,224,257 | May 2, 2025 |
| Dec 18, 2024 | PRTA PROTHENA CORP PUBLIC LTD CO | POpen-market purchase Ordinary Shares, par value $0.01 per share | +73,436 | $13.93 | $1.0M | 1,297,693 | May 2, 2025 |
| Dec 19, 2024 | PRTA PROTHENA CORP PUBLIC LTD CO | GGift Ordinary Shares, par value $0.01 per share | -681,000 | $0.00 | $0 | 616,693 | May 2, 2025 |
| Dec 20, 2024 | PRTA PROTHENA CORP PUBLIC LTD CO | POpen-market purchase Ordinary Shares, par value $0.01 per share | +2,000 | $15.91 | $32k | 618,693 | May 2, 2025 |
| Dec 20, 2024 | PRTA PROTHENA CORP PUBLIC LTD CO | GGift Ordinary Shares, par value $0.01 per share | -500 | $0.00 | $0 | 618,193 | May 2, 2025 |
| Dec 31, 2024 | PRTA PROTHENA CORP PUBLIC LTD CO | POpen-market purchase Ordinary Shares, par value $0.01 per share | +1,200 | $13.37 | $16k | 619,393 | May 2, 2025 |
| Dec 31, 2024 | PRTA PROTHENA CORP PUBLIC LTD CO | POpen-market purchase Ordinary Shares, par value $0.01 per share | +800 | $13.39 | $11k | 620,193 | May 2, 2025 |
| Dec 31, 2024 | PRTA PROTHENA CORP PUBLIC LTD CO | POpen-market purchase Ordinary Shares, par value $0.01 per share | +30,000 | $12.99 | $390k | 650,193 | May 2, 2025 |
| Jan 2, 2025 | PRTA PROTHENA CORP PUBLIC LTD CO | GGift Ordinary Shares, par value $0.01 per share | -13,200 | $0.00 | $0 | 636,993 | May 2, 2025 |
| Jan 3, 2025 | PRTA PROTHENA CORP PUBLIC LTD CO | GGift Ordinary Shares, par value $0.01 per share | -1,000 | $0.00 | $0 | 635,993 | May 2, 2025 |
| Jan 14, 2025 | PRTA PROTHENA CORP PUBLIC LTD CO | POpen-market purchase Ordinary Shares, par value $0.01 per share | +100,000 | $12.79 | $1.3M | 735,993 | May 2, 2025 |
| Dec 20, 2024 | PRTA PROTHENA CORP PUBLIC LTD CO | GGift Ordinary Shares, par value $0.01 per shareindirect: By Spouse | -40,000 | $0.00 | $0 | 59,000 | May 2, 2025 |
| Jan 15, 2025 | PRTA PROTHENA CORP PUBLIC LTD CO | GGift Ordinary Shares, par value $0.01 per shareindirect: By Spouse | -12,000 | $0.00 | $0 | 47,000 | May 2, 2025 |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.