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Scully William P Insider Trades & Stock Holdings

10% Owner · Prothena Corporation plc · Latest filing Oct 14, 2026

Scully William P, 10% Owner at Prothena Corporation plc has 8 Form 4 trades on file since Sep 18, 2026. Open-market activity: 8 purchases ($6.74M) and 0 sales ($0), net +$6.74M. Latest filing: acquired 10K shares of $PRTA on Oct 14, 2026 at $8.46.

Trades on file
8
Open-market bought
$6.74M
Open-market sold
$0
Net open-market
+$6.74M
Latest filing
Oct 14, 2026

All insider trades by Scully William P

DateTicker TypeSharesPriceValue Owned afterΔOwn 1W1M6MRoleFilingStory
$PRTA Buy (Open-market buy) 10K $8.46 $84.57K 10% Owner Read
$PRTA Buy (Open-market buy) 100K $8.35 $835.48K 10% Owner Read
$PRTA Buy (Open-market buy) 90K $8.57 $770.90K -1.3% 10% Owner —
$PRTA Buy (Open-market buy) 125K $8.40 $1.05M -1.3% 10% Owner —
$PRTA Buy (Open-market buy) 100K $8.57 $857.24K +5.7% 10% Owner —
$PRTA Buy (Open-market buy) 162K $8.68 $1.41M -8.7% 10% Owner —
$PRTA Buy (Open-market buy) 103.50K $8.60 $889.87K -5.2% 10% Owner —
$PRTA Buy (Open-market buy) 100K $8.43 $843.46K -3.4% 10% Owner Read

"Buy" means shares acquired on the Form 4 (including grants and option exercises); "Sell" means shares disposed. 1W / 1M / 6M = how the stock moved after the trade.

Stocks Scully William P traded

Frequently asked questions

Has Scully William P been buying or selling stock?

Scully William P has 8 open-market purchases and 0 open-market sales on file, net +$6.74M. Grants, option exercises and tax withholding are listed separately because they are not open-market trades.

What was Scully William P's latest insider trade?

acquired 10K shares of $PRTA on Oct 14, 2026 at $8.46.

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Data comes from public SEC Form 4 and 13F filings and STOCK Act disclosures. Dates are the trade or filing date reported. This page is for research only and is not investment advice.

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