IMMUNOGEN INC

CUSIP: 45253H101 Class: Common Stock

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM's Holding History (CIK: 0001081019)

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

Q4 2023
Shares 250,499 Value ($000) $7,427 Avg Close — Range —
Q3 2023
Shares 246,379 Value ($000) $3,910 Avg Close — Range —
Q2 2023
Shares 273,184 Value ($000) $5,155 Avg Close — Range —
Q1 2023
Shares 254,360 Value ($000) $977 Avg Close — Range —
Q4 2022
Shares 258,567 Value ($000) $1,282 Avg Close — Range —
Q3 2022
Shares 255,574 Value ($000) $1,222 Avg Close — Range —
Q2 2022
Shares 260,904 Value ($000) $1,174 Avg Close — Range —
Q1 2022
Shares 264,587 Value ($000) $1,259 Avg Close — Range —
Q4 2021
Shares 277,833 Value ($000) $2,062 Avg Close — Range —
Q3 2021
Shares 268,915 Value ($000) $1,525 Avg Close — Range —
Q2 2021
Shares 269,361 Value ($000) $1,775 Avg Close — Range —
Q1 2021
Shares 289,325 Value ($000) $2,344 Avg Close — Range —
Q4 2020
Shares 279,411 Value ($000) $1,802 Avg Close — Range —
Q3 2020
Shares 259,545 Value ($000) $934 Avg Close — Range —
Q2 2020
Shares 256,811 Value ($000) $1,181 Avg Close — Range —
Q1 2020
Shares 256,811 Value ($000) $876 Avg Close — Range —
Q4 2019
Shares 221,520 Value ($000) $1,131 Avg Close — Range —
Q3 2019
Shares 225,995 Value ($000) $547 Avg Close — Range —
Q2 2019
Shares 221,402 Value ($000) $480 Avg Close — Range —
Q1 2019
Shares 221,402 Value ($000) $600 Avg Close — Range —
Q4 2018
Shares 222,760 Value ($000) $1,069 Avg Close — Range —
Q3 2018
Shares 219,618 Value ($000) $2,080 Avg Close — Range —
Q2 2018
Shares 196,130 Value ($000) $1,908 Avg Close — Range —
Q1 2018
Shares 152,115 Value ($000) $1,600 Avg Close — Range —
Q4 2017
Shares 157,447 Value ($000) $1,009 Avg Close — Range —
Q3 2017
Shares 134,658 Value ($000) $1,030 Avg Close — Range —
Q2 2017
Shares 149,150 Value ($000) $1,060 Avg Close — Range —
Q1 2017
Shares 165,950 Value ($000) $642 Avg Close — Range —
Q4 2016
Shares 173,450 Value ($000) $354 Avg Close — Range —
Q3 2016
Shares 177,850 Value ($000) $477 Avg Close — Range —
Q2 2016
Shares 176,650 Value ($000) $544 Avg Close — Range —
Q1 2016
Shares 182,577 Value ($000) $1,556 Avg Close — Range —
Q4 2015
Shares 159,672 Value ($000) $2,167 Avg Close — Range —
Q3 2015
Shares 157,135 Value ($000) $1,508 Avg Close — Range —
Q2 2015
Shares 157,335 Value ($000) $2,262 Avg Close — Range —
Q1 2015
Shares 156,612 Value ($000) $1,402 Avg Close — Range —
Q4 2014
Shares 159,112 Value ($000) $971 Avg Close — Range —
Q3 2014
Shares 158,435 Value ($000) $1,678 Avg Close — Range —
Q2 2014
Shares 156,636 Value ($000) $1,856 Avg Close — Range —
Q1 2014
Shares 153,636 Value ($000) $2,294 Avg Close — Range —
Q4 2013
Shares 153,036 Value ($000) $2,245 Avg Close — Range —
Q3 2013
Shares 152,036 Value ($000) $2,588 Avg Close — Range —
Q2 2013
Shares 147,288 Value ($000) $2,444 Avg Close — Range —
Q1 2013
Shares 145,110 Value ($000) $2,330 Avg Close — Range —