Portolan Capital Management, LLC's ownership history for ONTO

Portolan Capital Management, LLC currently holds 22.3K shares with a market value of $4.6M. It started holding ONTO on 2025-09-30. At its peak, it held 44.6K shares on 2025-09-30. Its highest holding value was $5.8M on 2025-09-30. At its lowest, it held 22.3K shares on 2026-03-31, with a value of $4.6M on 2026-03-31.