This security is no longer actively traded. Historical data is preserved for reference.Mass exit (>50 sellers), 1 residual holder(s)
ALTR (ALTAIR ENGR INC) is held by 1 institutional investors as of Q4 2025. Largest holders: HUNTINGTON NATIONAL BANK ($2,075).
Data sourced from four SEC data sources: 13F, Form 4, 13D/13G, and STOCK Act. Not financial advice. Full disclaimer