ImmunoGen Inc. discovers and develops therapeutic monoclonal antibodies and novel treatments in the field of oncology. Its lead technology, which it refers to as tumor-activated prodrug, uses antibodies to deliver potent cell-killing agents specifically to cancer cells.

Filers who had this stock in their top 10: 0
13F Filers holding this stock: 148
Aggregate shares on 09/30/2015: 76,360,624
Aggregate shares on 06/30/2015: 77,226,312
Percent change: -1.12%
Funds creating new positions: 23
Funds Adding to an existing position: 48
Funds closing out their position: 12
Funds reducing their position: 50
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13F Filers holding this stock

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Schedule 13D and 13G filings submitted since 09/30/2015

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