| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| FMR LLC | 3.5% | -49% | $750,600 | -$729,735 | 2,345,624 | -49% | FMR LLC | 30 Jun 2025 |
| BlackRock, Inc. | 1.7% | $414,737 | 1,152,047 | BlackRock, Inc. | 30 Jun 2025 |
As of 30 Sep 2025, 4 institutional investors reported holding 858,490 shares of Generation Bio Co. - #OTHER (GBIO). This represents 1.3% of the company’s total 67,017,829 outstanding shares.
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2025 Q3 | 858,490 | $5,187,430 | -$56,969,423 | $6.12 | 4 |
| 2025 Q2 | 41,347,675 | $13,241,105 | -$2,211,405 | $0.32 | 56 |
| 2025 Q1 | 47,705,137 | $19,320,399 | -$4,690,760 | $0.40 | 80 |
| 2024 Q4 | 53,853,674 | $57,085,022 | -$7,372,065 | $1.06 | 79 |
| 2024 Q3 | 55,236,044 | $136,420,864 | -$9,378,723 | $2.47 | 75 |
| 2024 Q2 | 55,483,336 | $156,462,811 | +$1,094,118 | $2.82 | 76 |
| 2024 Q1 | 54,950,269 | $223,660,626 | +$10,865,322 | $4.07 | 75 |
| 2023 Q4 | 52,571,531 | $86,742,055 | -$23,320,359 | $1.65 | 75 |
| 2023 Q3 | 57,206,477 | $216,814,886 | -$1,287,599 | $3.79 | 75 |
| 2023 Q2 | 57,297,209 | $315,133,897 | +$381,806 | $5.50 | 81 |
| 2023 Q1 | 57,380,158 | $246,742,110 | +$1,739,378 | $4.30 | 85 |
| 2022 Q4 | 57,156,978 | $224,610,878 | -$3,045,863 | $3.93 | 97 |
| 2022 Q3 | 57,722,564 | $306,424,712 | -$6,672,501 | $5.31 | 106 |
| 2022 Q2 | 55,404,809 | $363,530,297 | -$9,079,416 | $6.56 | 90 |
| 2022 Q1 | 56,326,705 | $413,402,875 | +$10,960,565 | $7.34 | 84 |
| 2021 Q4 | 54,866,351 | $388,453,640 | -$38,102,073 | $7.08 | 84 |
| 2021 Q3 | 47,987,388 | $1,203,091,395 | +$36,561,347 | $25.07 | 80 |
| 2021 Q2 | 46,476,896 | $1,249,307,742 | +$48,933,202 | $26.90 | 95 |
| 2021 Q1 | 44,565,545 | $1,268,300,627 | +$358,564,223 | $28.46 | 86 |
| 2020 Q4 | 31,971,964 | $906,479,426 | +$57,532,398 | $28.35 | 68 |
| 2020 Q3 | 29,423,428 | $896,346,193 | +$44,778,577 | $30.91 | 52 |
| 2020 Q2 | 28,360,183 | $580,774,000 | +$580,774,000 | $21.00 | 48 |