Round Rock Advisors, LLC's ownership history for OSIS

Round Rock Advisors, LLC currently holds 1.2K shares with a market value of $309.4K. It started holding OSIS on 2025-09-30. At its peak, it held 1.2K shares on 2025-12-31. Its highest holding value was $309.4K on 2025-12-31. At its lowest, it held 859 shares on 2025-09-30, with a value of $214.1K on 2025-09-30.