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.

View SEC Filings from IMGN instead.
Filers who had this stock in their top 10: 0
13F Filers holding this stock: 155
Aggregate shares on 06/30/2016: 80,007,956
Aggregate shares on 03/31/2016: 75,500,477
Percent change: 5.97%
Funds creating new positions: 37
Funds Adding to an existing position: 53
Funds closing out their position: 22
Funds reducing their position: 31
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13F Filers holding this stock

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*Please note that if a filer hasn't submitted a 13F filing for a quarter then the filer's shares will be listed as "Sold All"

Schedule 13D and 13G filings submitted since 06/30/2016

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