IMMUNOGEN INC

CUSIP: 45253H101 Class: Common Stock

Rock Springs Capital Management LP's Holding History (CIK: 0001595725)

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

Q4 2023
Shares 759,365 Value ($000) $22,515 Avg Close — Range —
Q3 2023
Shares 759,365 Value ($000) $12,051 Avg Close — Range —
Q2 2023
Shares 112,620 Value ($000) $2,125 Avg Close — Range —