GROUP ONE TRADING LLC's ownership history for CSGP

GROUP ONE TRADING LLC currently holds 19.7K shares with a market value of $1.3M. It started holding CSGP on 2024-12-31. At its peak, it held 19.7K shares on 2025-12-31. Its highest holding value was $1.3M on 2025-12-31. At its lowest, it held 1.1K shares on 2025-09-30, with a value of $89.5K on 2025-09-30. In the recent 180 days, GROUP ONE TRADING LLC has increased its shares by 16.5K.