William Scully Insider Trades & Stock Holdings

Prothena Corporation plc · Latest filing Jun 16, 2026

William Scully at Prothena Corporation plc has 4 Form 4 trades on file since Jun 11, 2026. Open-market activity: 3 purchases ($2.20M) and 0 sales ($0), net +$2.20M. Latest filing: acquired 20K shares of $PRTA on Jun 16, 2026 at $7.90.

Trades on file

4

Open-market bought

$2.20M

Open-market sold

$0

Net open-market

+$2.20M

Latest filing

Jun 16, 2026

All insider trades by William Scully

Date	Ticker	Type	Shares	Price	Value	Owned after	ΔOwn	1W	1M	6M	Role	Filing	Story
Jun 16, 2026	$PRTA	Buy (Open-market buy)	20K	$7.90	$158K			+15.2%	+2.2%				Read
Jun 15, 2026	$PRTA	Sell (Gift)	325K	$0	—			+12.3%	+3.4%				—
Jun 11, 2026	$PRTA	Buy (Open-market buy)	125K	$8.17	$1.02M			+8.1%	+6.9%				—
Jun 11, 2026	$PRTA	Buy (Open-market buy)	125K	$8.17	$1.02M			+8.1%	+6.9%				—

"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 William Scully traded

• $PRTA

Frequently asked questions

Has William Scully been buying or selling stock?

William Scully has 3 open-market purchases and 0 open-market sales on file, net +$2.20M. Grants, option exercises and tax withholding are listed separately because they are not open-market trades.

What was William Scully's latest insider trade?

acquired 20K shares of $PRTA on Jun 16, 2026 at $7.90.

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.