Portolan Capital Management, LLC's ownership history for AMPY

Portolan Capital Management, LLC currently holds 74.1K shares with a market value of $462.5K. It started holding AMPY on 2025-12-31. At its peak, it held 89.1K shares on 2025-12-31. Its highest holding value was $462.5K on 2026-03-31. At its lowest, it held 74.1K shares on 2026-03-31, with a value of $407.0K on 2025-12-31.