IMMUNOGEN INC

CUSIP: 45253H101 Class: Common Stock

Choate Investment Advisors's Holding History (CIK: 0001399794)

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

Q1 2021
Shares 10,000 Value ($000) $81 Avg Close — Range —
Q4 2020
Shares 10,000 Value ($000) $65 Avg Close — Range —