SCULLY WILLIAM P — SEC Form 4 Insider Trading Activity

Summary

Updated Jul 16, 2026

SCULLY WILLIAM P has filed 6 SEC Form 4 filings across 1 company in the last 90 days — buying. Lifetime open-market purchases: $5.85M. Historical track record: 4/5 stars across 6 tracked purchases.

Track Record

InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realised performance after each tracked open-market purchase.

InsiderAlpha rating★★★★☆ (4/5)
Total purchases tracked6
Purchases with forward-return data6
30-day win rate8333%
90-day win rate1667%
Avg 5-day return+465.07%
Avg 30-day return+599.63%
Avg 90-day return-1026.21%
Best 30-day return+1523.01%

Recent Transactions

DateTickerCompanyCodeSharesPriceValue
2026-06-18PRTAPROTHENA CORP PUBLIC LTD COP — Open-market purchase20.0K$7.90$158K
2026-06-16PRTAPROTHENA CORP PUBLIC LTD COG — Bona-fide gift325.0K$0.00
2026-06-12PRTAPROTHENA CORP PUBLIC LTD COP — Open-market purchase125.0K$8.17$1.02M
2026-06-05PRTAPROTHENA CORP PUBLIC LTD COP — Open-market purchase50.0K$9.31$465K
2026-06-03PRTAPROTHENA CORP PUBLIC LTD COP — Open-market purchase50.0K$9.43$471K
2026-05-26PRTAPROTHENA CORP PUBLIC LTD COP — Open-market purchase100.0K$9.81$981K
2024-12-18PRTAPROTHENA CORP PUBLIC LTD COG — Bona-fide gift12.0K$0.00
2024-12-18PRTAPROTHENA CORP PUBLIC LTD COG — Bona-fide gift40.0K$0.00
2024-12-18PRTAPROTHENA CORP PUBLIC LTD COP — Open-market purchase100.0K$12.79$1.28M
2024-12-18PRTAPROTHENA CORP PUBLIC LTD COG — Bona-fide gift1.0K$0.00
2024-12-18PRTAPROTHENA CORP PUBLIC LTD COG — Bona-fide gift13.2K$0.00
2024-12-18PRTAPROTHENA CORP PUBLIC LTD COP — Open-market purchase30.0K$12.99$390K
2024-12-18PRTAPROTHENA CORP PUBLIC LTD COP — Open-market purchase800$13.39$11K
2024-12-18PRTAPROTHENA CORP PUBLIC LTD COP — Open-market purchase1.2K$13.37$16K
2024-12-18PRTAPROTHENA CORP PUBLIC LTD COG — Bona-fide gift500$0.00
2024-12-18PRTAPROTHENA CORP PUBLIC LTD COP — Open-market purchase2.0K$15.91$32K
2024-12-18PRTAPROTHENA CORP PUBLIC LTD COG — Bona-fide gift681.0K$0.00
2024-12-18PRTAPROTHENA CORP PUBLIC LTD COP — Open-market purchase73.4K$13.93$1.02M
2024-12-18PRTAPROTHENA CORP PUBLIC LTD COG — Bona-fide gift430.0K$0.00

Companies — Last 90 Days

Frequently Asked Questions

Who is SCULLY WILLIAM P?

SCULLY WILLIAM P is a corporate insider — currently tracked as 10% Owner of PROTHENA CORP PUBLIC LTD CO (PRTA). InsiderAlpha tracks every SEC Form 4 filing in real time.

How many SEC Form 4 filings has SCULLY WILLIAM P submitted recently?

6 primary Form 4 filings in the last 90 days, covering 1 company.

Has SCULLY WILLIAM P been buying or selling stock?

Recorded transactions: 11 open-market purchases ($5.85M) and 0 open-market sales () across all tracked filings.

How accurate is SCULLY WILLIAM P's historical track record?

Across 6 tracked purchases, SCULLY WILLIAM P averaged +599.6% avg 30-day return with a 8333% 30-day win rate. InsiderAlpha rates the track record at 4/5 stars.

Where can I see all of SCULLY WILLIAM P's SEC filings?

All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.

Learn More

Open the live SCULLY WILLIAM P profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.