MACKAY SHIELDS LLC's ownership history for IONS

MACKAY SHIELDS LLC currently holds 2.4M shares with a market value of $3.8M. It started holding IONS on 2026-06-30. At its peak, it held 2.4M shares on 2026-06-30. Its highest holding value was $3.8M on 2026-06-30. At its lowest, it held 2.4M shares on 2026-06-30, with a value of $3.8M on 2026-06-30.