IMMUNOGEN INC

CUSIP: 45253H101 Class: Common Stock

CASTLEARK MANAGEMENT LLC's Holding History (CIK: 0001106832)

Note: Option positions (PUT/CALL) are excluded.

Q3 2023
Shares 88,490 Value ($000) $1,404 Avg Close — Range —
Q2 2023
Shares 89,460 Value ($000) $1,688 Avg Close — Range —