PRTA

William P. Scully

Known title: 10% OwnerCIK: 0001045463

William P. Scully's purchase track record

How the stock did after each of William P. Scully's open-market purchases, measured from the purchase date. Several fills within a week count as one purchase.

Purchases measured
3
of 12 since December 18, 2024
Stock higher 6 months later
0%
3 months: 50%
Median 6-month return
-51.9%
3 months: +0.3%
Beat the S&P 500
0%
median -57.8% vs. index
PurchaseStockAmount3 months6 months
10/7/2026PRTA$1.82Mpendingpending
9/28/2026PRTA$3.15Mpendingpending
9/18/2026PRTA$843Kpendingpending
9/2/2026PRTA$256Kpendingpending
8/20/2026PRTA$439Kpendingpending
6/11/2026PRTA$1.18M+9.2%pending
6/2/2026PRTA$937K+4.6%pending
5/22/2026PRTA$981K-4.0%pending
1/14/2025PRTA$1.28M-24.3%-50.9%
12/31/2024PRTA$416K-15.2%-54.8%
12/18/2024PRTA$1.05M+7.8%-51.9%

Computed by MarketWall from SEC Form 4 filings and daily closing prices (close on the purchase date to the close about 3 and 6 months later). Companies that have since delisted are not included. Past results, not investment advice.

Associated companies

AI Market Commentary

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Synthesized from recent news and fundamentals/technical data -- not human analyst commentary or trader sentiment.

September 25, 2026

Prothena included in Alzheimer's Day stock watchlist. Prothena was featured in a Yahoo Finance article listing four Alzheimer's drug stocks to watch on World Alzheimer's Day. This inclusion highlights the company's relevance in the neurodegenerative disease sector. The stock is currently trading near its 52-week low, with technical indicators showing a rejection at support levels.

this person other insiders at PRTA

Transaction History

PRTA▲ Buy$771K
PRTA▲ Buy$1.1M
PRTA▲ Buy$857K
PRTA▲ Buy$1.4M
PRTA▲ Buy$890K
PRTA▲ Buy$843K
PRTA▲ Buy$256K
PRTA▲ Buy$439K
PRTA▼ Sell$0
PRTA▼ Sell$0
PRTA▼ Sell$0
PRTA▲ Buy$293K
PRTA▲ Buy$30K
PRTA▲ Buy$158K
PRTA▼ Sell$0
PRTA▲ Buy$1.0M
PRTA▲ Buy$465K
PRTA▲ Buy$471K
PRTA▲ Buy$981K
PRTA▼ Sell$0
PRTA▲ Buy$1.3M
PRTA▼ Sell$0
PRTA▼ Sell$0
PRTA▲ Buy$16K
PRTA▲ Buy$11K
PRTA▲ Buy$390K
PRTA▲ Buy$32K
PRTA▼ Sell$0
PRTA▼ Sell$0
PRTA▼ Sell$0
PRTA▲ Buy$1.0M
PRTA▼ Sell$0

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