IMMUNOGEN INC

CUSIP: 45253H101 Class: Common Stock

Artisan Partners Limited Partnership's Holding History (CIK: 0001466153)

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

Q4 2023
Shares 1,172,323 Value ($000) $34,759 Avg Close — Range —
Q3 2023
Shares 3,724,583 Value ($000) $59,109 Avg Close — Range —
Q2 2023
Shares 3,725,921 Value ($000) $70,308 Avg Close — Range —
Q1 2023
Shares 3,181,379 Value ($000) $12,216 Avg Close — Range —