Generation Bio Co. - #OTHER (GBIO) Institutional Ownership

13F Institutional Holders and Ownership History from Q2 2020 to Q3 2025

Type / Class
Equity / #OTHER
Symbol
GBIO on Nasdaq
Shares outstanding
67,017,829
Price per share
$6.12
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares
858,490
Total reported value
$5,187,430
% of total 13F portfolios
0%
Share change
-40,487,518
Value change
-$56,969,290
Number of holders
4
Price from insider filings
$6.12
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of Generation Bio Co. - #OTHER (GBIO) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
FMR LLC 3.5% -49% $867,881 -$843,756 2,345,624 -49% FMR LLC 30 Jun 2025
BlackRock, Inc. 1.7% $426,257 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.

Institutional Holders of Generation Bio Co. - #OTHER (GBIO) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q3 858,490 $5,187,430 -$56,969,290 $6.12 4
2025 Q2 41,347,715 $13,261,214 -$2,191,293 $0.32 58
2025 Q1 47,705,137 $19,320,313 -$4,690,769 $0.40 80
2024 Q4 53,853,674 $57,085,179 -$7,372,062 $1.06 79
2024 Q3 55,236,044 $136,421,239 -$9,378,724 $2.47 75
2024 Q2 55,483,336 $156,463,248 +$1,094,149 $2.82 76
2024 Q1 54,950,269 $223,660,804 +$11,345,357 $4.07 75
2023 Q4 18,902 $31,188 $1.65 1
2023 Q3 57,190,687 $216,754,391 -$1,305,533 $3.79 74
2023 Q2 57,297,209 $315,134,256 +$379,810 $5.50 81
2023 Q1 57,371,466 $246,704,491 +$1,752,662 $4.30 85
2022 Q4 57,124,415 $224,482,658 -$3,071,464 $3.93 95
2022 Q3 52,985,630 $281,271,114 -$8,664,702 $5.31 97
2022 Q2 51,263,788 $336,118,544 -$10,544,053 $6.56 84
2022 Q1 52,944,545 $388,576,875 +$11,177,267 $7.34 81
2021 Q4 51,434,738 $364,159,640 -$38,591,043 $7.08 82
2021 Q3 47,830,042 $1,199,146,395 +$36,292,768 $25.07 80
2021 Q2 46,431,797 $1,248,094,742 +$48,874,473 $26.90 94
2021 Q1 44,565,741 $1,268,305,627 +$358,564,189 $28.46 87
2020 Q4 29,157,773 $826,697,426 +$57,532,382 $28.35 67
2020 Q3 29,423,428 $896,346,193 +$44,792,550 $30.91 52
2020 Q2 28,360,183 $580,774,000 +$580,766,107 $21.00 48