IMMUNOGEN INC

CUSIP: 45253H101 Class: Common Stock

ESSEX INVESTMENT MANAGEMENT CO LLC's Holding History (CIK: 0000201772)

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

Q3 2023
Shares 7,443 Value ($000) $118 Avg Close — Range —
Q3 2018
Shares 61,676 Value ($000) $584 Avg Close — Range —