IMMUNOGEN INC

CUSIP: 45253H101 Class: Common Stock

MACKAY SHIELDS LLC's Holding History (CIK: 0000061227)

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

Q1 2019
Shares 66,110 Value ($000) $179 Avg Close — Range —
Q4 2018
Shares 66,110 Value ($000) $317 Avg Close — Range —
Q3 2018
Shares 55,800 Value ($000) $528 Avg Close — Range —
Q2 2018
Shares 45,700 Value ($000) $445 Avg Close — Range —