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Generation Bio (GBIO) Institutional Ownership

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Institutional Ownership Changes (13F Filings) for Generation Bio (NASDAQ:GBIO)

Current
Institutional Ownership
Percentage
95.22%
Number of
Institutional Buyers
(last 12 months)
16
Total
Institutional Inflows
(last 12 months)
$12.85M
Number of
Institutional Sellers
(last 12 months)
19
Total
Institutional Outflows
(last 12 months)
$106.27M
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Skip Chart & View Institutional Buying and Selling Data

GBIO Institutional Buying and Selling by Quarter

Generation Bio Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
2/26/2026Seven Fleet Capital Management LP5,376$31K0.0%N/A0.080%
2/18/2026Torno Capital LLC25,000$142K0.0%N/A0.371%
2/18/2026Opaleye Management Inc.310,000$1.76M0.2%N/A4.599%
2/18/2026Millennium Management LLC88,563$503K0.0%-9.0%1.314%
2/17/2026Price T Rowe Associates Inc. MD209,641$1.19M0.0%-63.7%3.110%
2/13/2026Marshall Wace LLP140,294$797K0.0%-35.8%2.082%
2/13/2026Siren L.L.C.201,419$1.14M0.0%-32.2%2.988%
2/12/2026DRW Securities LLC43,812$249K0.0%N/A0.650%
2/12/2026Renaissance Technologies LLC287,614$1.63M0.0%-16.5%4.267%
2/12/2026SymBiosis Capital Partners LLC665,000$3.78M3.6%N/A9.866%
2/10/2026Goldman Sachs Group Inc.91,527$520K0.0%-22.8%1.358%
2/9/2026Geode Capital Management LLC51,795$294K0.0%+4.0%0.769%
1/29/2026 Deltec Asset Management LLC32,650$185K0.0%N/A0.484%
12/1/2025Cantor Fitzgerald L. P.99,000$606K0.0%N/A1.469%
11/17/2025Palo Alto Investors LP15,047$92K0.0%-90.0%0.223%
11/17/2025Millennium Management LLC97,354$596K0.0%-90.8%1.444%
11/17/2025Citadel Advisors LLC47,197$289K0.0%-84.7%0.700%
11/17/2025Baker BROS. Advisors LP194,493$1.19M0.0%-90.0%2.886%
11/17/2025Bank of America Corp DE84,817$519K0.0%-90.3%1.258%
11/17/2025Cantor Fitzgerald L. P.99,000$606K0.0%N/A1.469%
11/14/2025ADAR1 Capital Management LLC22,144$136K0.0%N/A0.329%
11/14/2025Shay Capital LLC10,414$64K0.0%N/A0.155%
11/14/2025Two Sigma Investments LP12,442$76K0.0%-88.3%0.185%
11/14/2025Atlas Venture Life Science Advisors LLC827,946$5.07M0.7%-90.0%12.284%
11/13/2025UBS Group AG148,721$910K0.0%-83.2%2.207%
11/10/2025TD Asset Management Inc26,708$163K0.0%-92.2%0.396%
11/7/2025Vanguard Group Inc.229,833$1.41M0.0%-90.0%3.410%
8/15/2025Militia Capital Partners LP542,347$174K0.1%N/A8.047%
8/15/2025Bank of America Corp DE871,951$279K0.0%-32.3%12.937%
8/13/2025Marshall Wace LLP116,201$37K0.0%N/A1.724%
8/8/2025Geode Capital Management LLC498,080$159K0.0%-55.1%7.390%
8/1/2025 Y Intercept Hong Kong Ltd148,186$47K0.0%N/A2.211%
6/27/2025Goldman Sachs Group Inc.1,086,098$440K0.0%-10.1%1.620%
5/21/2025Acadian Asset Management LLC1,159,135$468K0.0%+54.3%1.729%
5/16/2025Goldman Sachs Group Inc.1,086,098$440K0.0%-10.1%1.620%
5/16/2025Jacobs Levy Equity Management Inc.182,005$74K0.0%-41.6%0.272%
5/16/2025AQR Capital Management LLC89,014$36K0.0%N/A0.133%
5/12/2025Nuveen LLC169,265$69K0.0%N/A0.253%
5/9/2025Deutsche Bank AG108,771$45K0.0%-40.9%0.162%
5/8/2025Jefferies Financial Group Inc.173,659$70K0.0%-92.3%0.259%
4/22/2025EWA LLC92,901$38K0.0%N/A0.139%
3/7/2025Aegis Wealth Management LLC88,890$94K0.1%N/A0.133%
2/27/2025Jefferies Financial Group Inc.2,261,817$2.40M0.0%N/A3.386%
2/17/2025Squarepoint Ops LLC65,628$70K0.0%N/A0.098%
2/17/2025Two Sigma Investments LP120,403$128K0.0%-19.7%0.180%
2/17/2025Two Sigma Advisers LP194,400$206K0.0%-10.5%0.291%
2/17/2025Millennium Management LLC91,578$97K0.0%N/A0.137%
2/17/2025Jacobs Levy Equity Management Inc.311,535$330K0.0%+13.9%0.466%
2/17/2025Jefferies Financial Group Inc.2,261,817$2.40M0.0%N/A3.386%
2/17/2025Deutsche Bank AG184,173$195K0.0%+688.7%0.276%
2/17/2025D. E. Shaw & Co. Inc.344,922$366K0.0%-29.3%0.516%
2/17/2025Bridgeway Capital Management LLC246,800$262K0.0%-23.8%0.370%
2/14/2025The Manufacturers Life Insurance Company145,094$154K0.0%-11.5%0.217%
2/14/2025Integrated Wealth Concepts LLC72,720$77K0.0%N/A0.109%
2/14/2025Price T Rowe Associates Inc. MD9,279,059$9.84M0.0%-0.8%13.893%
2/14/2025Dimensional Fund Advisors LP396,237$420K0.0%-10.2%0.593%
2/13/2025Renaissance Technologies LLC962,959$1.02M0.0%+62.0%1.442%
2/12/2025JPMorgan Chase & Co.297,705$316K0.0%+74.9%0.446%
2/11/2025Intech Investment Management LLC23,337$25K0.0%N/A0.035%
2/6/2025Charles Schwab Investment Management Inc.367,026$389K0.0%-13.3%0.550%
2/4/2025Los Angeles Capital Management LLC245,927$261K0.0%-16.8%0.368%
11/19/2024Barclays PLC76,430$189K0.0%+165.5%0.114%
11/15/2024Barclays PLC76,430$189K0.0%+165.5%0.114%
11/15/2024XTX Topco Ltd17,922$44K0.0%-86.5%0.027%
11/15/2024Jane Street Group LLC34,783$86K0.0%-29.9%0.052%
11/15/2024State Street Corp992,188$2.45M0.0%+1.2%1.486%
11/15/2024Jacobs Levy Equity Management Inc.273,445$675K0.0%-9.2%0.409%
11/15/2024Baker BROS. Advisors LP1,944,945$4.80M0.0%+61.1%2.912%
11/13/2024FMR LLC5,320,266$13.14M0.0%+0.3%7.966%
11/12/2024Charles Schwab Investment Management Inc.423,299$1.05M0.0%+2.1%0.634%
11/6/2024Cornercap Investment Counsel Inc.28,995$72K0.0%-49.5%0.043%
11/4/2024Los Angeles Capital Management LLC295,727$730K0.0%-13.5%0.443%
10/3/2024SG Americas Securities LLC17,067$42K0.0%N/A0.026%
9/16/2024Cubist Systematic Strategies LLC19,046$54K0.0%+91.0%0.029%
8/15/2024The Manufacturers Life Insurance Company164,573$464K0.0%+8.7%0.247%
8/14/2024Cubist Systematic Strategies LLC19,046$54K0.0%+91.0%0.029%
8/12/2024XTX Topco Ltd132,716$374K0.0%-20.2%0.199%
8/9/2024Renaissance Technologies LLC636,400$1.80M0.0%-4.2%0.957%
8/9/2024Dimensional Fund Advisors LP485,396$1.37M0.0%-3.7%0.730%
8/8/2024Cornercap Investment Counsel Inc.57,424$162K0.0%-22.6%0.086%
8/8/2024American Century Companies Inc.31,786$90K0.0%+199.3%0.048%
8/6/2024Acadian Asset Management LLC594,569$1.68M0.0%+23.9%0.894%
8/6/2024Los Angeles Capital Management LLC341,861$964K0.0%-10.4%0.514%
8/1/2024Rhumbline Advisers78,903$222K0.0%+7.4%0.119%
7/26/2024Bank of New York Mellon Corp186,756$527K0.0%+31.2%0.281%
5/17/2024Artal Group S.A.2,830,591$11.52M0.3%+0.6%4.255%
5/16/2024Jacobs Levy Equity Management Inc.32,352$132K0.0%-63.5%0.049%
5/15/2024Baker BROS. Advisors LP371,219$1.51M0.0%N/A0.558%
5/15/2024Yiheng Capital Management L.P.191,530$780K0.0%N/A0.288%
5/15/2024Bellevue Group AG3,861,575$15.72M0.2%+6.8%5.808%
5/15/2024Price T Rowe Associates Inc. MD8,878,361$36.14M0.0%+28.2%13.353%
5/10/2024Acadian Asset Management LLC479,835$1.95M0.0%+113.9%0.722%
5/10/2024Vanguard Group Inc.2,570,456$10.46M0.0%+0.7%3.866%
5/7/2024PFG Advisors10,000$41K0.0%N/A0.015%
5/7/2024SG Americas Securities LLC16,626$68K0.0%-65.7%0.025%
5/1/2024Mirae Asset Global Investments Co. Ltd.18,259$74K0.0%N/A0.027%
4/5/2024Los Angeles Capital Management LLC381,661$1.55M0.0%+38.4%0.574%
2/15/2024PFM Health Sciences LP1,622,487$2.68M0.2%-35.5%2.455%
2/12/2024Weiss Asset Management LP81,630$135K0.0%N/A0.124%
2/8/2024Panagora Asset Management Inc.29,638$49K0.0%N/A0.045%


GBIO Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of GBIO shares?

During the previous two years, 61 institutional investors and hedge funds held shares of Generation Bio. The most heavily invested institutionals were Bellevue Group AG ($15.72M), FMR LLC ($13.14M), Artal Group S.A. ($11.52M), Atlas Venture Life Science Advisors LLC ($5.07M), SymBiosis Capital Partners LLC ($3.78M), State Street Corp ($2.45M), and Opaleye Management Inc. ($1.76M).Learn more on Generation Bio's institutional investors.

What percentage of Generation Bio's stock is owned by institutional investors?

95.22% of Generation Bio's stock is owned by institutional investors. Learn more on GBIO's institutional investor holdings.

Which institutional investors have been buying Generation Bio's stock?

Of the 44 institutional investors that purchased Generation Bio's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Jefferies Financial Group Inc. ($4.52M), Price T Rowe Associates Inc. MD ($1.95M), Baker BROS. Advisors LP ($1.11M), Acadian Asset Management LLC ($778.05K), SymBiosis Capital Partners LLC ($665K), Militia Capital Partners LP ($542.35K), and Renaissance Technologies LLC ($368.66K).

How much institutional buying is happening at Generation Bio?

Institutional investors have bought a total of 2,787,242 shares in the last 24 months. This purchase volume represents approximately $12.85M in transactions.

Which of Generation Bio's major shareholders have been selling company stock?

Of the 19 institutional investors that sold Generation Bio's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Atlas Venture Life Science Advisors LLC ($7.45M), Jefferies Financial Group Inc. ($2.09M), Vanguard Group Inc. ($2.07M), Baker BROS. Advisors LP ($1.75M), Bank of America Corp DE ($1.20M), Millennium Management LLC ($973.04K), and UBS Group AG ($736.18K).

How much institutional selling is happening at Generation Bio?

Institutional investors have sold a total of 18,757,852 shares in the last 24 months. This volume of shares sold represents approximately $106.27M in transactions.


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This page (NASDAQ:GBIO) was last updated on 5/6/2026 by MarketBeat.com Staff.
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