IMMUNOGEN INC

CUSIP: 45253H101 Class: Common Stock

North Star Investment Management Corp.'s Holding History (CIK: 0001342857)

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

Q3 2015
Shares 437 Value ($000) $4 Avg Close — Range —
Q2 2015
Shares 437 Value ($000) $6 Avg Close — Range —
Q1 2015
Shares 437 Value ($000) $4 Avg Close — Range —
Q4 2014
Shares 437 Value ($000) $3 Avg Close — Range —