William P. Scully, a 10% owner of PROTHENA CORP PUBLIC LTD CO (PRTA), acquired 125,000 shares of the company on October 9, 2026. The transaction, valued at approximately $1.05 million, was executed at a price of $8.40 per share.
This significant purchase follows a series of other substantial buy transactions by Mr. Scully in recent weeks, indicating a sustained belief in the company's future performance. Insider purchases of this magnitude are often interpreted by the market as a strong signal of confidence from key stakeholders.