IMMUNOGEN INC

CUSIP: 45253H101 Class: Common Stock

Arizona State Retirement System's Holding History (CIK: 0001558481)

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

Q4 2023
Shares 66,111 Value ($000) $1,960 Avg Close — Range —
Q3 2023
Shares 62,272 Value ($000) $988 Avg Close — Range —
Q2 2023
Shares 61,430 Value ($000) $1,159 Avg Close — Range —
Q1 2023
Shares 57,567 Value ($000) $221 Avg Close — Range —
Q4 2022
Shares 56,052 Value ($000) $278 Avg Close — Range —
Q3 2022
Shares 53,937 Value ($000) $258 Avg Close — Range —
Q2 2022
Shares 53,788 Value ($000) $242 Avg Close — Range —
Q1 2022
Shares 54,771 Value ($000) $261 Avg Close — Range —
Q4 2021
Shares 54,477 Value ($000) $404 Avg Close — Range —
Q3 2021
Shares 54,463 Value ($000) $309 Avg Close — Range —
Q2 2021
Shares 52,927 Value ($000) $349 Avg Close — Range —
Q1 2021
Shares 54,590 Value ($000) $442 Avg Close — Range —
Q4 2020
Shares 50,640 Value ($000) $327 Avg Close — Range —
Q3 2020
Shares 52,623 Value ($000) $189 Avg Close — Range —
Q2 2020
Shares 39,323 Value ($000) $181 Avg Close — Range —
Q1 2020
Shares 40,150 Value ($000) $137 Avg Close — Range —