GROUP ONE TRADING LLC's ownership history for AMSC

GROUP ONE TRADING LLC currently holds 46.9K shares with a market value of $2.8M. It started holding AMSC on 2025-06-30. At its peak, it held 46.9K shares on 2025-09-30. Its highest holding value was $2.8M on 2025-09-30. At its lowest, it held 7.3K shares on 2025-06-30, with a value of $267.8K on 2025-06-30.