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DRIEHAUS CAPITAL MANAGEMENT LLC
> IMGN
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2023 | ImmunoGen, Inc. | IMGN | 1,176,130 | 1,176,130 | 22,193,573,000 | 22,193,573,000 | $18,870.00 |
| 09/30/2022 | ImmunoGen, Inc. | IMGN | 0 | -330,909 | 0 | -1,489,000 | |
| 06/30/2022 | ImmunoGen, Inc. | IMGN | 330,909 | 80,909 | 1,489,000 | 299,000 | $4.50 |
| 03/31/2022 | ImmunoGen, Inc. | IMGN | 250,000 | 0 | 1,190,000 | -665,000 | $4.76 |
| 12/31/2021 | ImmunoGen, Inc. | IMGN | 250,000 | 250,000 | 1,855,000 | 1,855,000 | $7.42 |
| 09/30/2017 | ImmunoGen, Inc. | IMGN | 0 | -67,739 | 0 | -482,000 | |
| 06/30/2017 | ImmunoGen, Inc. | IMGN | 67,739 | 67,739 | 482,000 | 482,000 | $7.12 |
| 09/30/2015 | ImmunoGen, Inc. | IMGN | 0 | -172,288 | 0 | -2,478,000 | |
| 06/30/2015 | ImmunoGen, Inc. | IMGN | 173,720 | -1,240,454 | 2,498,000 | -6,369,000 | $14.38 |
| 09/30/2010 | ImmunoGen, Inc. | IMGN | 1,414,174 | 1,225,739 | 8,867,000 | 7,339,000 | $6.27 |
| 06/30/2010 | ImmunoGen, Inc. | IMGN | 732,783 | 557,754 | 6,793,000 | 5,417,000 | $9.27 |
| 12/31/2009 | ImmunoGen, Inc. | IMGN | 175,029 | -13,406 | 1,376,000 | -152,000 | $7.86 |
| 09/30/2009 | ImmunoGen, Inc. | IMGN | 188,435 | 60,844 | 1,528,000 | 428,000 | $8.11 |
| 06/30/2009 | ImmunoGen, Inc. | IMGN | 127,591 | -271,663 | 1,100,000 | -1,735,000 | $8.62 |
| 03/31/2009 | ImmunoGen, Inc. | IMGN | 399,254 | 399,254 | 2,835,000 | 2,835,000 | $7.10 |
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