IMMUNOGEN INC

CUSIP: 45253H101 Class: Common Stock

CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM's Holding History (CIK: 0000919079)

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

Q1 2021
Shares 349,000 Value ($000) $2,827 Avg Close Range
Q4 2020
Shares 383,709 Value ($000) $2,475 Avg Close Range
Q3 2020
Shares 388,721 Value ($000) $1,399 Avg Close Range
Q2 2020
Shares 385,632 Value ($000) $1,774 Avg Close Range
Q1 2020
Shares 329,664 Value ($000) $1,124 Avg Close Range
Q4 2019
Shares 315,164 Value ($000) $1,609 Avg Close Range
Q3 2019
Shares 227,100 Value ($000) $550 Avg Close Range
Q2 2019
Shares 191,200 Value ($000) $415 Avg Close Range
Q1 2019
Shares 348,900 Value ($000) $946 Avg Close Range
Q4 2018
Shares 383,986 Value ($000) $1,843 Avg Close Range
Q3 2018
Shares 184,531 Value ($000) $1,748 Avg Close Range
Q2 2018
Shares 146,302 Value ($000) $1,424 Avg Close Range
Q1 2018
Shares 172,204 Value ($000) $1,812 Avg Close Range
Q4 2017
Shares 197,132 Value ($000) $1,264 Avg Close Range
Q3 2017
Shares 111,500 Value ($000) $853 Avg Close Range
Q2 2017
Shares 111,500 Value ($000) $793 Avg Close Range
Q1 2017
Shares 111,500 Value ($000) $432 Avg Close Range
Q4 2016
Shares 116,300 Value ($000) $237 Avg Close Range
Q3 2016
Shares 116,300 Value ($000) $312 Avg Close Range
Q2 2016
Shares 124,300 Value ($000) $383 Avg Close Range
Q1 2016
Shares 128,200 Value ($000) $1,092 Avg Close Range
Q4 2015
Shares 136,000 Value ($000) $1,846 Avg Close Range
Q3 2015
Shares 136,000 Value ($000) $1,306 Avg Close Range
Q2 2015
Shares 136,000 Value ($000) $1,956 Avg Close Range
Q1 2015
Shares 136,000 Value ($000) $874 Avg Close Range
Q4 2014
Shares 136,000 Value ($000) $874 Avg Close Range
Q3 2014
Shares 145,500 Value ($000) $1,541 Avg Close Range
Q2 2014
Shares 142,700 Value ($000) $1,691 Avg Close Range
Q1 2014
Shares 136,000 Value ($000) $1,882 Avg Close Range
Q4 2013
Shares 136,000 Value ($000) $2,073 Avg Close Range
Q3 2013
Shares 139,600 Value ($000) $2,376 Avg Close Range
Q2 2013
Shares 107,600 Value ($000) $1,785 Avg Close Range