Reporting owner · CIK 0001045463
Scully William P
SEC Form 4 history across 1 companies, 13 transactions and 10 filings.
10%PROTHENA CORP PUBLIC LTD CO
Open-market transaction mix100% buys11 buys · 0 sales
Available history · Jun 04, 2026 – Oct 14, 2026
Latest insider transactions
Form 4 filings from available history.Latest Form 4 facts
Quick context from source filings
Latest open-market transaction
buy at PROTHENA CORP PUBLIC LTD CO on Oct 14, 2026 valued at $84,569.
Review SEC filingLatest sale
No open-market insider sale is available.
Monthly open-market activity
Last 4 reported months · purchases and sales
View exact monthly values
| Month | Purchases | Sales | Buy value | Sale value | Net value |
|---|---|---|---|---|---|
| Jun 2026 | 1 | 0 | $465,295.00 | $0.00 | $465,295.00 |
| Aug 2026 | 1 | 0 | $439,430.00 | $0.00 | $439,430.00 |
| Sep 2026 | 4 | 0 | $3,394,744.90 | $0.00 | $3,394,744.90 |
| Oct 2026 | 5 | 0 | $3,598,343.00 | $0.00 | $3,598,343.00 |
Net value is disclosed purchases minus sales, not profit. A dash means the value is unavailable.
Ownership and transaction size
Ownership and ticket size
Average P/S size$718K
Median P/S size$835.5K
Direct8
Indirect5
Oct 14, 2026buy
Filing-only signals
Deterministic matches in this insider's history
Associated companies
Companies in the disclosed reporting history
Open-market buy performance
90-day forward return on this insider's open-market purchases
Forward return is not available yet
No purchases currently have the price observations needed for a 90-day return. This may reflect incomplete price coverage or purchases that have not reached the return window.
Disclosed ownership
How reported shareholdings evolved
Non-derivative shares held after reported transactions—not stock prices or a complete portfolio.
8 observations · Jun 4, 2026 – Oct 14, 2026. Window ends at the latest available report, not today.
Selected observation · Oct 14, 20261,037,000 shares reported
Inspect transaction View exact observations and source transactions
| Transaction date | Shares held after | Filed | Source |
|---|---|---|---|
| Jun 4, 2026 | 936,000 | Jun 5, 2026 | View transaction |
| Aug 17, 2026 | 1,377,553 | Aug 18, 2026 | View transaction |
| Aug 18, 2026 | 750,000 | Aug 18, 2026 | View transaction |
| Aug 20, 2026 | 800,000 | Aug 21, 2026 | View transaction |
| Sep 2, 2026 | 827,000 | Sep 3, 2026 | View transaction |
| Sep 18, 2026 | 927,000 | Sep 21, 2026 | View transaction |
| Oct 13, 2026 | 1,027,000 | Oct 15, 2026 | View transaction |
| Oct 14, 2026 | 1,037,000 | Oct 15, 2026 | View transaction |
Securities and direct/indirect ownership contexts are kept separate and never summed. Joint filings may associate the same disclosed row with multiple owners. Unknown values are omitted, not treated as zero. Lines connect observations for readability; they do not establish holdings between filings, cost basis, or current ownership. Amendments and stock splits require reviewing the source.
Scully William P Insider Activity FAQ
SEC Form 4 context
Who is Scully William P?
Scully William P is a reporting owner in SEC Form 4 filings with reporting owner CIK 0001045463.
Which companies has Scully William P reported transactions for?
PROTHENA CORP PUBLIC LTD CO
When was Scully William P's latest insider buy?
buy at PROTHENA CORP PUBLIC LTD CO on Oct 14, 2026 valued at $84,569.
When was Scully William P's latest insider sale?
No open-market insider sale is available for this period.
Where can I see the original SEC filings?
Each transaction row links directly to the source SEC filing so the reported Form 4 details can be reviewed.
Are performance metrics included?
The profile shows average and median 90-day stock returns after open-market purchases when price coverage is available. These are unadjusted stock returns, not realized trading gains. Win rates, benchmark-adjusted returns and conviction scores are not calculated.