William P. Scully, a 10% owner of PROTHENA CORP PUBLIC LTD CO (PRTA), acquired 162,000 shares of the company on September 29, 2026. The transaction, valued at approximately $1.41 million, occurred at an average price of $8.68 per share.
This substantial purchase follows a series of other acquisitions by Mr. Scully in recent weeks, totaling hundreds of thousands of shares. Insider buying of this magnitude is often interpreted as a strong signal of an executive's confidence in the company's future performance and growth prospects.