As of 30 Sep 2025, 1 institutional investors reported holding 1 shares of IMMUNOGEN INC - COMMON STOCK (IMGN).
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2025 Q4 | 1 | $269 | $269.00 | 1 | |
| 2025 Q3 | 1 | $269 | $269.00 | 1 | |
| 2025 Q2 | 1 | $269 | $269.00 | 1 | |
| 2025 Q1 | 1 | $269 | $269.00 | 1 | |
| 2024 Q4 | 1 | $269 | $269.00 | 1 | |
| 2024 Q3 | 1 | $269 | $269.00 | 1 | |
| 2024 Q2 | 1 | $31 | -$59,396 | $31.00 | 1 |
| 2024 Q1 | 893 | $27,761 | -$7,522,571,671 | $31.00 | 3 |
| 2023 Q4 | 254,094,050 | $7,533,999,824 | +$401,339,258 | $29.65 | 326 |
| 2023 Q3 | 246,454,885 | $3,911,227,602 | +$257,146,887 | $15.87 | 276 |
| 2023 Q2 | 224,551,519 | $4,237,141,822 | +$343,848,874 | $18.87 | 264 |
| 2023 Q1 | 210,134,362 | $806,046,933 | +$5,739,854 | $3.84 | 187 |
| 2022 Q4 | 204,686,288 | $1,015,224,276 | +$15,852,646 | $4.96 | 198 |
| 2022 Q3 | 196,733,103 | $940,400,518 | +$7,046,885 | $4.78 | 202 |
| 2022 Q2 | 196,092,107 | $882,406,823 | +$7,352,086 | $4.50 | 197 |
| 2022 Q1 | 194,501,818 | $924,831,254 | -$12,112,857 | $4.76 | 200 |
| 2021 Q4 | 189,754,200 | $1,407,026,080 | +$89,029,135 | $7.42 | 214 |
| 2021 Q3 | 176,648,627 | $1,001,871,527 | -$25,186,396 | $5.67 | 201 |
| 2021 Q2 | 180,668,821 | $1,190,571,826 | -$26,866,259 | $6.59 | 195 |
| 2021 Q1 | 182,687,155 | $1,479,725,302 | +$74,532,731 | $8.10 | 203 |
| 2020 Q4 | 173,709,826 | $1,120,464,336 | +$212,001,470 | $6.45 | 197 |
| 2020 Q3 | 142,008,985 | $511,237,055 | +$6,612,840 | $3.60 | 165 |
| 2020 Q2 | 139,175,703 | $640,170,630 | +$17,620,182 | $4.60 | 175 |
| 2020 Q1 | 137,178,692 | $467,794,385 | +$82,382,310 | $3.41 | 169 |
| 2019 Q4 | 111,809,273 | $567,678,267 | +$41,943,730 | $5.10 | 174 |
| 2019 Q3 | 103,982,410 | $251,586,634 | +$5,492,886 | $2.42 | 164 |
| 2019 Q2 | 102,051,776 | $221,128,288 | -$29,615,975 | $2.17 | 166 |
| 2019 Q1 | 117,682,098 | $318,624,822 | -$28,869,908 | $2.71 | 182 |
| 2018 Q4 | 122,756,981 | $588,847,064 | -$60,802,727 | $4.80 | 177 |
| 2018 Q3 | 124,766,837 | $1,181,528,261 | -$9,871,259 | $9.47 | 188 |
| 2018 Q2 | 125,723,455 | $1,223,252,651 | +$198,903,783 | $9.73 | 183 |
| 2018 Q1 | 104,934,056 | $1,103,855,950 | +$31,576,229 | $10.52 | 193 |
| 2017 Q4 | 103,884,846 | $665,949,340 | +$83,951,114 | $6.41 | 182 |
| 2017 Q3 | 90,282,460 | $690,629,199 | +$108,864,763 | $7.65 | 169 |
| 2017 Q2 | 76,168,455 | $541,547,835 | +$63,586,322 | $7.11 | 147 |
| 2017 Q1 | 67,598,721 | $261,589,769 | +$26,227,730 | $3.87 | 122 |
| 2016 Q4 | 66,971,713 | $136,614,635 | -$18,795,271 | $2.04 | 140 |
| 2016 Q3 | 75,431,853 | $201,946,041 | -$17,035,141 | $2.68 | 137 |
| 2016 Q2 | 81,532,810 | $251,080,099 | +$1,581,580 | $3.08 | 139 |
| 2016 Q1 | 77,027,993 | $656,394,142 | -$9,499,906 | $8.52 | 138 |
| 2015 Q4 | 77,614,965 | $1,053,239,260 | +$2,552,467 | $13.57 | 145 |
| 2015 Q3 | 77,716,380 | $746,150,091 | -$4,514,138 | $9.60 | 144 |
| 2015 Q2 | 78,867,330 | $1,134,054,269 | +$87,968,575 | $14.38 | 135 |
| 2015 Q1 | 74,117,079 | $662,816,260 | +$49,520,429 | $8.95 | 132 |
| 2014 Q4 | 69,292,924 | $422,665,502 | -$92,941,856 | $6.10 | 127 |
| 2014 Q3 | 75,100,804 | $795,229,916 | +$13,273,482 | $10.59 | 138 |
| 2014 Q2 | 73,805,446 | $874,504,384 | -$33,989,744 | $11.85 | 135 |
| 2014 Q1 | 76,361,856 | $1,139,805,895 | +$14,032,171 | $14.93 | 137 |