Canton Hathaway, LLC's ownership history for PTGX

Canton Hathaway, LLC currently holds 1.0K shares with a market value of $105.4K. It started holding PTGX on 2025-12-31. At its peak, it held 1.0K shares on 2025-12-31. Its highest holding value was $105.4K on 2026-03-31. At its lowest, it held 1.0K shares on 2025-12-31, with a value of $87.3K on 2025-12-31.