Arthur W. Homan, 10% Owner at PROTHENA CORP PUBLIC LTD CO (PRTA), bought 103,500 shares at $8.60 ($890K) on 2026-09-28, disclosed to the SEC on 2026-09-29.
10% shareholder Arthur W. Homan purchased 103,500 shares for $860,000, marking the largest insider purchase in the company's history. This significant accumulation by a major holder could signal confidence in the stock's recovery potential following a prolonged downtrend.
The stock is trading down 6.58% over the last 30 days and is currently 25.79% below its 52-week high of $11.77, trading at $8.735. The shares are still 11.77% above the 52-week low of $7.815.
Insider cluster: The trade is flagged as the largest insider purchase ever recorded for PRTA, indicating a strong bullish signal from a major holder. Technical setup: The stock is down 8.68% over the last 90 days, presenting a potential value entry point.
Bearish sentiment: The stock has a short interest of 20.05% of the float, which could lead to volatility if the stock rallies. Sector risk: The stock is down 10.5% over the last year, underperforming the broader market.
Nothing distinguishes this filing.
| Filing → |
| PRTA | BUY | 2026-10-09 | $1.8M | — | Filing → |
| PRTA | BUY | 2026-10-06 | $857K | — | Filing → |
| PRTA | BUY | 2026-09-30 | $1.4M | — | Filing → |