IMMUNOGEN INC

CUSIP: 45253H101 Class: Common Stock

Aperio Group, LLC's Holding History (CIK: 0001364615)

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

Q4 2020
Shares 32,609 Value ($000) $210 Avg Close — Range —
Q3 2020
Shares 34,628 Value ($000) $125 Avg Close — Range —
Q2 2020
Shares 33,960 Value ($000) $156 Avg Close — Range —
Q1 2020
Shares 30,699 Value ($000) $105 Avg Close — Range —
Q4 2019
Shares 20,318 Value ($000) $104 Avg Close — Range —
Q3 2019
Shares 17,508 Value ($000) $42 Avg Close — Range —
Q2 2019
Shares 6,220 Value ($000) $13 Avg Close — Range —
Q1 2019
Shares 10,392 Value ($000) $28 Avg Close — Range —
Q4 2018
Shares 13,367 Value ($000) $64 Avg Close — Range —
Q3 2018
Shares 12,386 Value ($000) $117 Avg Close — Range —
Q2 2017
Shares 16,797 Value ($000) $119 Avg Close — Range —
Q1 2017
Shares 11,576 Value ($000) $45 Avg Close — Range —
Q3 2014
Shares 16,077 Value ($000) $170 Avg Close — Range —