Q3 2025 13F Holders as of 9/30/2025
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Type / Class
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Equity / Common Stock
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Shares outstanding
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6.7M
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Number of holders
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35
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Total 13F shares, excl. options
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3.11M
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Shares change
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+2.99M
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Total reported value, excl. options
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$19M
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Value change
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+$18.3M
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Number of buys
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33
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Number of sells
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-2
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Price
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$6.12
Significant Holders of Generation Bio Co. - Common Stock (GBIO) as of Q3 2025
36 filings reported holding GBIO - Generation Bio Co. - Common Stock as of Q3 2025.
Generation Bio Co. - Common Stock (GBIO) has 35 institutional shareholders that have filed 13F forms with the Securities Exchange Commission (SEC).
These institutions hold a total of 3.11M shares
of 6.7M outstanding shares and own 46.45% of the company stock.
Largest 10 shareholders include PRICE T ROWE ASSOCIATES INC /MD/ (577K shares), RENAISSANCE TECHNOLOGIES LLC (344K shares), Siren, L.L.C. (297K shares), VANGUARD GROUP INC (230K shares), MARSHALL WACE, LLP (218K shares), BAKER BROS. ADVISORS LP (194K shares), MORGAN STANLEY (164K shares), UBS Group AG (149K shares), ACADIAN ASSET MANAGEMENT LLC (128K shares), and GOLDMAN SACHS GROUP INC (119K shares).
This table shows the top 35 institutional shareholders of the company equity. This data is sourced directly from the SEC via 13F filings.
| Investor |
Option |
Weight % |
Change % |
Value $ |
* Price $ |
Shares |
Share Change |
Activity |
Report Period |
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.