IMMUNOGEN INC

CUSIP: 45253H101 Class: Common Stock

NatWest Group plc's Holding History (CIK: 0000844150)

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

Q3 2014
Shares 91,856 Value ($000) $973 Avg Close — Range —
Q2 2014
Shares 74,216 Value ($000) $879 Avg Close — Range —
Q1 2014
Shares 68,918 Value ($000) $1,029 Avg Close — Range —
Q4 2013
Shares 59,292 Value ($000) $870 Avg Close — Range —
Q3 2013
Shares 53,763 Value ($000) $915 Avg Close — Range —
Q2 2013
Shares 61,485 Value ($000) $1,020 Avg Close — Range —