IMMUNOGEN INC

CUSIP: 45253H101 Class: Common Stock

RA CAPITAL MANAGEMENT, L.P.'s Holding History (CIK: 0001346824)

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

Q4 2023
Shares 23,750,601 Value ($000) $704,205 Avg Close — Range —
Q3 2023
Shares 13,322,288 Value ($000) $211,425 Avg Close — Range —
Q2 2023
Shares 2,329,958 Value ($000) $43,966 Avg Close — Range —
Q1 2023
Shares 21,853,958 Value ($000) $83,919 Avg Close — Range —
Q4 2022
Shares 21,853,958 Value ($000) $108,396 Avg Close — Range —
Q3 2022
Shares 21,741,458 Value ($000) $103,924 Avg Close — Range —
Q2 2022
Shares 21,741,458 Value ($000) $97,837 Avg Close — Range —
Q1 2022
Shares 21,741,458 Value ($000) $103,489 Avg Close — Range —
Q4 2021
Shares 20,241,458 Value ($000) $150,192 Avg Close — Range —
Q3 2021
Shares 18,417,458 Value ($000) $104,427 Avg Close — Range —
Q2 2021
Shares 18,417,458 Value ($000) $121,371 Avg Close — Range —
Q1 2021
Shares 18,417,458 Value ($000) $149,181 Avg Close — Range —
Q4 2020
Shares 18,417,458 Value ($000) $118,793 Avg Close — Range —
Q3 2020
Shares 7,040,485 Value ($000) $25,346 Avg Close — Range —
Q1 2020
Shares 5,166,303 Value ($000) $17,617 Avg Close — Range —