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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)
13
Total
Institutional Inflows
(last 12 months)
$10.15M
Number of
Institutional Sellers
(last 12 months)
16
Total
Institutional Outflows
(last 12 months)
$96.49M
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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
2/26/2026 Seven Fleet Capital Management LP5,376$31K0.0%N/A0.080%
2/18/2026 Torno Capital LLC25,000$142K0.0%N/A0.371%
2/18/2026 Opaleye Management Inc.310,000$1.76M0.2%N/A4.599%
2/18/2026 Millennium Management LLC88,563$503K0.0%-9.0%1.314%
2/17/2026 Price T Rowe Associates Inc. MD209,641$1.19M0.0%-63.7%3.110%
2/13/2026 Marshall Wace LLP140,294$797K0.0%-35.8%2.082%
2/13/2026 Siren L.L.C.201,419$1.14M0.0%-32.2%2.988%
2/12/2026 DRW Securities LLC43,812$249K0.0%N/A0.650%
2/12/2026 Renaissance Technologies LLC287,614$1.63M0.0%-16.5%4.267%
2/12/2026 SymBiosis Capital Partners LLC665,000$3.78M3.6%N/A9.866%
2/10/2026 Goldman Sachs Group Inc.91,527$520K0.0%-22.8%1.358%
2/9/2026 Geode Capital Management LLC51,795$294K0.0%+4.0%0.769%
1/29/2026 Deltec Asset Management LLC32,650$185K0.0%N/A0.484%
12/1/2025 Cantor Fitzgerald L. P.99,000$606K0.0%N/A1.469%
11/17/2025 Palo Alto Investors LP15,047$92K0.0%-90.0%0.223%
11/17/2025 Millennium Management LLC97,354$596K0.0%-90.8%1.444%
11/17/2025 Citadel Advisors LLC47,197$289K0.0%-84.7%0.700%
11/17/2025 Baker BROS. Advisors LP194,493$1.19M0.0%-90.0%2.886%
11/17/2025 Bank of America Corp DE84,817$519K0.0%-90.3%1.258%
11/17/2025 Cantor Fitzgerald L. P.99,000$606K0.0%N/A1.469%
11/14/2025 ADAR1 Capital Management LLC22,144$136K0.0%N/A0.329%
11/14/2025 Shay Capital LLC10,414$64K0.0%N/A0.155%
11/14/2025 Two Sigma Investments LP12,442$76K0.0%-88.3%0.185%
11/14/2025 Atlas Venture Life Science Advisors LLC827,946$5.07M0.7%-90.0%12.284%
11/13/2025 UBS Group AG148,721$910K0.0%-83.2%2.207%
11/10/2025 TD 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%
8/15/2025 Bank of America Corp DE871,951$279K0.0%-32.3%12.937%
8/13/2025 Marshall Wace LLP116,201$37K0.0%N/A1.724%
8/8/2025 Geode Capital Management LLC498,080$159K0.0%-55.1%7.390%
8/1/2025 Y Intercept Hong Kong Ltd148,186$47K0.0%N/A2.211%
6/27/2025 Goldman 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%
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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%
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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

During the previous two years, 57 institutional investors and hedge funds held shares of Generation Bio. The most heavily invested institutionals were FMR LLC ($13.14M), Atlas Venture Life Science Advisors LLC ($5.07M), SymBiosis Capital Partners LLC ($3.78M), State Street Corp ($2.45M), Opaleye Management Inc. ($1.76M), Renaissance Technologies LLC ($1.63M), and Vanguard Group Inc. ($1.41M).Learn more on Generation Bio's institutional investors.

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

Of the 38 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), Baker BROS. Advisors LP ($737.99K), SymBiosis Capital Partners LLC ($665K), Militia Capital Partners LP ($542.35K), Acadian Asset Management LLC ($522.58K), Renaissance Technologies LLC ($368.66K), and Opaleye Management Inc. ($310K).

Institutional investors have bought a total of 2,121,120 shares in the last 24 months. This purchase volume represents approximately $10.15M in transactions.

Of the 16 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), Vanguard Group Inc. ($2.07M), Baker BROS. Advisors LP ($1.75M), Bank of America Corp DE ($1.20M), Millennium Management LLC ($973.04K), UBS Group AG ($736.18K), and Geode Capital Management LLC ($610.34K).

Institutional investors have sold a total of 16,342,591 shares in the last 24 months. This volume of shares sold represents approximately $96.49M in transactions.


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This page (NASDAQ:GBIO) was last updated on 5/31/2026 by MarketBeat.com Staff.
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