IMMUNOGEN INC

CUSIP: 45253H101 Class: Common Stock

STATE OF WISCONSIN INVESTMENT BOARD's Holding History (CIK: 0000854157)

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

Q4 2023
Shares 232,462 Value ($000) $6,892 Avg Close Range
Q3 2023
Shares 219,902 Value ($000) $3,490 Avg Close Range
Q2 2023
Shares 218,977 Value ($000) $4,132 Avg Close Range
Q1 2023
Shares 183,242 Value ($000) $704 Avg Close Range
Q4 2022
Shares 192,475 Value ($000) $955 Avg Close Range
Q3 2022
Shares 204,717 Value ($000) $979 Avg Close Range
Q2 2022
Shares 215,579 Value ($000) $970 Avg Close Range
Q1 2022
Shares 245,100 Value ($000) $1,167 Avg Close Range
Q4 2021
Shares 285,900 Value ($000) $2,121 Avg Close Range
Q3 2021
Shares 307,900 Value ($000) $1,746 Avg Close Range
Q2 2021
Shares 293,100 Value ($000) $1,932 Avg Close Range
Q1 2021
Shares 282,000 Value ($000) $2,284 Avg Close Range
Q4 2020
Shares 293,900 Value ($000) $1,896 Avg Close Range
Q3 2020
Shares 365,700 Value ($000) $1,317 Avg Close Range
Q2 2020
Shares 242,300 Value ($000) $1,115 Avg Close Range
Q1 2020
Shares 223,800 Value ($000) $763 Avg Close Range
Q4 2019
Shares 211,300 Value ($000) $1,079 Avg Close Range
Q3 2019
Shares 211,300 Value ($000) $511 Avg Close Range
Q2 2019
Shares 211,300 Value ($000) $459 Avg Close Range
Q1 2019
Shares 206,700 Value ($000) $560 Avg Close Range
Q4 2018
Shares 148,200 Value ($000) $711 Avg Close Range
Q3 2018
Shares 130,500 Value ($000) $1,236 Avg Close Range
Q2 2018
Shares 130,500 Value ($000) $1,270 Avg Close Range
Q1 2018
Shares 101,800 Value ($000) $1,071 Avg Close Range
Q4 2017
Shares 58,000 Value ($000) $372 Avg Close Range
Q3 2017
Shares 58,000 Value ($000) $444 Avg Close Range
Q2 2017
Shares 58,000 Value ($000) $412 Avg Close Range