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GBIO Insider Trading

Insider Ownership Percentage: 21.80%
Insider Buying (Last 12 Months): $203,208.40
Insider Selling (Last 12 Months): $0.00

Generation Bio Insider Trading History Chart

This chart shows the insider buying and selling history at Generation Bio by year and by quarter.

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Generation Bio Share Price & Price History

Current Price: $5.22
Price Change: ▼ Price Decrease of -0.01 (-0.19%)
As of 12/4/2025 05:00 PM ET

This chart shows the closing price history over time for GBIO up to the past year.

Skip Chart and Table DataPrice Data in Insider Trading History Table
Days: 30 | 90 | 365

Generation Bio Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
1/13/2025Anthony G QuinnDirectorBuy8,500$9.70$82,450.0029,928View SEC Filing Icon  
1/10/2025Anthony G QuinnDirectorBuy12,579$9.60$120,758.4021,428View SEC Filing Icon  
7/1/2024Antoinette PaoneCOOSell671$27.40$18,385.401,380View SEC Filing Icon  
1/2/2024Antoinette PaoneCOOSell244$16.20$3,952.80582View SEC Filing Icon  
12/8/2023Dannielle AppelhansDirectorBuy63$18.20$1,146.601,263View SEC Filing Icon  
12/4/2023Dannielle AppelhansDirectorBuy1,200$15.00$18,000.001,200View SEC Filing Icon  
8/23/2023Antoinette PaoneCOOSell311$49.30$15,332.30291View SEC Filing Icon  
7/3/2023Phillip SamayoaInsiderSell311$52.90$16,451.9010,142View SEC Filing Icon  
4/25/2023Antoinette PaoneCOOSell291$46.10$13,415.10View SEC Filing Icon  
1/26/2023Antoinette PaoneCOOSell269$55.60$14,956.40View SEC Filing Icon  
1/9/2023Phillip SamayoaInsiderSell186$51.10$9,504.609,581View SEC Filing Icon  
See Full Table

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

95.22% of Generation Bio stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at GBIO by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

Generation Bio Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
12/1/2025Cantor Fitzgerald L. P.99,000$0.61M0.0%N/A1.469%Search for SEC Filing on Google Icon
11/17/2025Palo Alto Investors LP15,047$92K0.0%-90.0%0.223%Search for SEC Filing on Google Icon
11/17/2025Millennium Management LLC97,354$0.60M0.0%-90.8%1.444%Search for SEC Filing on Google Icon
11/17/2025Citadel Advisors LLC47,197$0.29M0.0%-84.7%0.700%Search for SEC Filing on Google Icon
11/17/2025Baker BROS. Advisors LP194,493$1.19M0.0%-90.0%2.886%Search for SEC Filing on Google Icon
11/17/2025Bank of America Corp DE84,817$0.52M0.0%-90.3%1.258%Search for SEC Filing on Google Icon
11/17/2025Cantor Fitzgerald L. P.99,000$0.61M0.0%N/A1.469%Search for SEC Filing on Google Icon
11/14/2025ADAR1 Capital Management LLC22,144$0.14M0.0%N/A0.329%Search for SEC Filing on Google Icon
11/14/2025Shay Capital LLC10,414$64K0.0%N/A0.155%Search for SEC Filing on Google Icon
11/14/2025Two Sigma Investments LP12,442$76K0.0%-88.3%0.185%Search for SEC Filing on Google Icon
11/14/2025Atlas Venture Life Science Advisors LLC827,946$5.07M0.7%-90.0%12.284%Search for SEC Filing on Google Icon
11/13/2025UBS Group AG148,721$0.91M0.0%-83.2%2.207%Search for SEC Filing on Google Icon
11/10/2025TD Asset Management Inc26,708$0.16M0.0%-92.2%0.396%Search for SEC Filing on Google Icon
11/7/2025Vanguard Group Inc.229,833$1.41M0.0%-90.0%3.410%Search for SEC Filing on Google Icon
8/15/2025Militia Capital Partners LP542,347$0.17M0.1%N/A8.047%Search for SEC Filing on Google Icon
8/15/2025Bank of America Corp DE871,951$0.28M0.0%-32.3%12.937%Search for SEC Filing on Google Icon
8/13/2025Marshall Wace LLP116,201$37K0.0%N/A1.724%Search for SEC Filing on Google Icon
8/8/2025Geode Capital Management LLC498,080$0.16M0.0%-55.1%7.390%Search for SEC Filing on Google Icon
8/1/2025Y Intercept Hong Kong Ltd148,186$47K0.0%N/A2.211%Search for SEC Filing on Google Icon
6/27/2025Goldman Sachs Group Inc.1,086,098$0.44M0.0%-10.1%1.620%Search for SEC Filing on Google Icon
5/21/2025Acadian Asset Management LLC1,159,135$0.47M0.0%+54.3%1.729%Search for SEC Filing on Google Icon
5/16/2025Goldman Sachs Group Inc.1,086,098$0.44M0.0%-10.1%1.620%Search for SEC Filing on Google Icon
5/16/2025Jacobs Levy Equity Management Inc.182,005$74K0.0%-41.6%0.272%Search for SEC Filing on Google Icon
5/16/2025AQR Capital Management LLC89,014$36K0.0%N/A0.133%Search for SEC Filing on Google Icon
5/12/2025Nuveen LLC169,265$69K0.0%N/A0.253%Search for SEC Filing on Google Icon
5/9/2025Deutsche Bank AG108,771$45K0.0%-40.9%0.162%Search for SEC Filing on Google Icon
5/8/2025Jefferies Financial Group Inc.173,659$70K0.0%-92.3%0.259%Search for SEC Filing on Google Icon
4/22/2025EWA LLC92,901$38K0.0%N/A0.139%Search for SEC Filing on Google Icon
3/7/2025Aegis Wealth Management LLC88,890$94K0.1%N/A0.133%Search for SEC Filing on Google Icon
2/27/2025Jefferies Financial Group Inc.2,261,817$2.40M0.0%N/A3.386%Search for SEC Filing on Google Icon
2/17/2025Squarepoint Ops LLC65,628$70K0.0%N/A0.098%Search for SEC Filing on Google Icon
2/17/2025Two Sigma Investments LP120,403$0.13M0.0%-19.7%0.180%Search for SEC Filing on Google Icon
2/17/2025Two Sigma Advisers LP194,400$0.21M0.0%-10.5%0.291%Search for SEC Filing on Google Icon
2/17/2025Millennium Management LLC91,578$97K0.0%N/A0.137%Search for SEC Filing on Google Icon
2/17/2025Jacobs Levy Equity Management Inc.311,535$0.33M0.0%+13.9%0.466%Search for SEC Filing on Google Icon
2/17/2025Jefferies Financial Group Inc.2,261,817$2.40M0.0%N/A3.386%Search for SEC Filing on Google Icon
2/17/2025Deutsche Bank AG184,173$0.20M0.0%+688.7%0.276%Search for SEC Filing on Google Icon
2/17/2025D. E. Shaw & Co. Inc.344,922$0.37M0.0%-29.3%0.516%Search for SEC Filing on Google Icon
2/17/2025Bridgeway Capital Management LLC246,800$0.26M0.0%-23.8%0.370%Search for SEC Filing on Google Icon
2/14/2025The Manufacturers Life Insurance Company145,094$0.15M0.0%-11.5%0.217%Search for SEC Filing on Google Icon
2/14/2025Integrated Wealth Concepts LLC72,720$77K0.0%N/A0.109%Search for SEC Filing on Google Icon
2/14/2025Price T Rowe Associates Inc. MD9,279,059$9.84M0.0%-0.8%13.893%Search for SEC Filing on Google Icon
2/14/2025Dimensional Fund Advisors LP396,237$0.42M0.0%-10.2%0.593%Search for SEC Filing on Google Icon
2/13/2025Renaissance Technologies LLC962,959$1.02M0.0%+62.0%1.442%Search for SEC Filing on Google Icon
2/12/2025JPMorgan Chase & Co.297,705$0.32M0.0%+74.9%0.446%Search for SEC Filing on Google Icon
2/11/2025Intech Investment Management LLC23,337$25K0.0%N/A0.035%Search for SEC Filing on Google Icon
2/6/2025Charles Schwab Investment Management Inc.367,026$0.39M0.0%-13.3%0.550%Search for SEC Filing on Google Icon
2/4/2025Los Angeles Capital Management LLC245,927$0.26M0.0%-16.8%0.368%Search for SEC Filing on Google Icon
11/19/2024Barclays PLC76,430$0.19M0.0%+165.5%0.114%Search for SEC Filing on Google Icon
11/15/2024Barclays PLC76,430$0.19M0.0%+165.5%0.114%Search for SEC Filing on Google Icon
11/15/2024XTX Topco Ltd17,922$44K0.0%-86.5%0.027%Search for SEC Filing on Google Icon
11/15/2024Jane Street Group LLC34,783$86K0.0%-29.9%0.052%Search for SEC Filing on Google Icon
11/15/2024State Street Corp992,188$2.45M0.0%+1.2%1.486%Search for SEC Filing on Google Icon
11/15/2024Jacobs Levy Equity Management Inc.273,445$0.68M0.0%-9.2%0.409%Search for SEC Filing on Google Icon
11/15/2024Baker BROS. Advisors LP1,944,945$4.80M0.0%+61.1%2.912%Search for SEC Filing on Google Icon
11/13/2024FMR LLC5,320,266$13.14M0.0%+0.3%7.966%Search for SEC Filing on Google Icon
11/12/2024Charles Schwab Investment Management Inc.423,299$1.05M0.0%+2.1%0.634%Search for SEC Filing on Google Icon
11/6/2024Cornercap Investment Counsel Inc.28,995$72K0.0%-49.5%0.043%Search for SEC Filing on Google Icon
11/4/2024Los Angeles Capital Management LLC295,727$0.73M0.0%-13.5%0.443%Search for SEC Filing on Google Icon
10/3/2024SG Americas Securities LLC17,067$42K0.0%N/A0.026%Search for SEC Filing on Google Icon
9/16/2024Cubist Systematic Strategies LLC19,046$54K0.0%+91.0%0.029%Search for SEC Filing on Google Icon
8/15/2024The Manufacturers Life Insurance Company164,573$0.46M0.0%+8.7%0.247%Search for SEC Filing on Google Icon
8/14/2024Cubist Systematic Strategies LLC19,046$54K0.0%+91.0%0.029%Search for SEC Filing on Google Icon
8/12/2024XTX Topco Ltd132,716$0.37M0.0%-20.2%0.199%Search for SEC Filing on Google Icon
8/9/2024Renaissance Technologies LLC636,400$1.80M0.0%-4.2%0.957%Search for SEC Filing on Google Icon
8/9/2024Dimensional Fund Advisors LP485,396$1.37M0.0%-3.7%0.730%Search for SEC Filing on Google Icon
8/8/2024Cornercap Investment Counsel Inc.57,424$0.16M0.0%-22.6%0.086%Search for SEC Filing on Google Icon
8/8/2024American Century Companies Inc.31,786$90K0.0%+199.3%0.048%Search for SEC Filing on Google Icon
8/6/2024Acadian Asset Management LLC594,569$1.68M0.0%+23.9%0.894%Search for SEC Filing on Google Icon
8/6/2024Los Angeles Capital Management LLC341,861$0.96M0.0%-10.4%0.514%Search for SEC Filing on Google Icon
8/1/2024Rhumbline Advisers78,903$0.22M0.0%+7.4%0.119%Search for SEC Filing on Google Icon
7/26/2024Bank of New York Mellon Corp186,756$0.53M0.0%+31.2%0.281%Search for SEC Filing on Google Icon
5/17/2024Artal Group S.A.2,830,591$11.52M0.3%+0.6%4.255%Search for SEC Filing on Google Icon
5/16/2024Jacobs Levy Equity Management Inc.32,352$0.13M0.0%-63.5%0.049%Search for SEC Filing on Google Icon
5/15/2024Baker BROS. Advisors LP371,219$1.51M0.0%N/A0.558%Search for SEC Filing on Google Icon
5/15/2024Yiheng Capital Management L.P.191,530$0.78M0.0%N/A0.288%Search for SEC Filing on Google Icon
5/15/2024Bellevue Group AG3,861,575$15.72M0.2%+6.8%5.808%Search for SEC Filing on Google Icon
5/15/2024Price T Rowe Associates Inc. MD8,878,361$36.14M0.0%+28.2%13.353%Search for SEC Filing on Google Icon
5/10/2024Acadian Asset Management LLC479,835$1.95M0.0%+113.9%0.722%Search for SEC Filing on Google Icon
5/10/2024Vanguard Group Inc.2,570,456$10.46M0.0%+0.7%3.866%Search for SEC Filing on Google Icon
5/7/2024PFG Advisors10,000$41K0.0%N/A0.015%Search for SEC Filing on Google Icon
5/7/2024SG Americas Securities LLC16,626$68K0.0%-65.7%0.025%Search for SEC Filing on Google Icon
5/1/2024Mirae Asset Global Investments Co. Ltd.18,259$74K0.0%N/A0.027%Search for SEC Filing on Google Icon
4/5/2024Los Angeles Capital Management LLC381,661$1.55M0.0%+38.4%0.574%Search for SEC Filing on Google Icon
2/15/2024PFM Health Sciences LP1,622,487$2.68M0.2%-35.5%2.455%Search for SEC Filing on Google Icon
2/12/2024Weiss Asset Management LP81,630$0.14M0.0%N/A0.124%Search for SEC Filing on Google Icon
2/8/2024Panagora Asset Management Inc.29,638$49K0.0%N/A0.045%Search for SEC Filing on Google Icon
2/6/2024Los Angeles Capital Management LLC275,834$0.46M0.0%+315.6%0.417%Search for SEC Filing on Google Icon
2/5/2024Kestra Private Wealth Services LLC30,500$50K0.0%N/A0.046%Search for SEC Filing on Google Icon
1/12/2024SG Americas Securities LLC48,470$80K0.0%+260.9%0.073%Search for SEC Filing on Google Icon
11/13/2023FMR LLC8,432,773$31.96M0.0%-2.2%12.790%Search for SEC Filing on Google Icon
10/27/2023TD Asset Management Inc406,598$1.54M0.0%+72.1%0.617%Search for SEC Filing on Google Icon
10/13/2023SG Americas Securities LLC13,430$51K0.0%N/A0.020%Search for SEC Filing on Google Icon
9/21/2023Barclays PLC17,395$95K0.0%-42.4%0.026%Search for SEC Filing on Google Icon
8/11/2023SVB Financial Group27,882$0.15M0.3%-31.0%0.042%Search for SEC Filing on Google Icon
8/11/2023Sectoral Asset Management Inc.356,740$1.96M0.3%-7.4%0.541%Search for SEC Filing on Google Icon
8/9/2023TD Asset Management Inc236,255$1.30M0.0%+2.1%0.358%Search for SEC Filing on Google Icon
8/3/2023Innovis Asset Management LLC10,022$55K0.0%-49.6%0.015%Search for SEC Filing on Google Icon
7/24/2023Vontobel Holding Ltd.356,740$1.96M0.0%-7.4%0.543%Search for SEC Filing on Google Icon
5/15/2023EcoR1 Capital LLC1,956,579$8.41M0.3%N/A3.279%Search for SEC Filing on Google Icon
Data available starting January 2016

See Full Table
Generation Bio logo
Generation Bio Co. develops non-viral genetic medicines for the treatment of rare and prevalent diseases. The company develops cell-targeted lipid nanoparticle (ctLNP) platform, a modular delivery system for nucleic acids to avoid off-target clearance by the liver and spleen that enables ctLNPs to persist in systemic circulation, which allows for highly selective and potent ligand-driven targeting to specific tissues and cell types; and novel immune-quiet DNA (iqDNA) to enable long-lasting high levels of gene expression from non-integrating episomes and avoids innate immune sensors that have long prevented DNA from use in non-viral systems. It uses its platform for developing a portfolio of programs for treating cancer, autoimmune, hematologic disorders, prioritizing sickle cell, beta-thalassemia, and hemophilia A diseases, as well as for other tissues and cell types, including retina, skeletal muscle, and central nervous system. The company was formerly known as Torus Therapeutics, Inc. and changed its name to Generation Bio Co. in November 2017. Generation Bio Co. was incorporated in 2016 and is headquartered in Cambridge, Massachusetts.
Read More on Generation Bio

Today's Range

Now: $5.22
Low: $5.09
High: $5.36

50 Day Range

MA: $5.73
Low: $5.01
High: $6.71

52 Week Range

Now: $5.22
Low: $3.00
High: $13.80

Volume

27,711 shs

Average Volume

56,724 shs

Market Capitalization

$35.18 million

P/E Ratio

N/A

Dividend Yield

N/A

Beta

1.96

Who are the company insiders with the largest holdings of Generation Bio?

Generation Bio's top insider shareholders include:
  1. Anthony G Quinn (Director)
  2. Antoinette Paone (COO)
  3. Dannielle Appelhans (Director)
Learn More about top insider investors at Generation Bio.

Who are the major institutional investors of Generation Bio?

Generation Bio's top institutional investors include:
  1. Atlas Venture Life Science Advisors LLC — 12.28%
  2. Vanguard Group Inc. — 3.41%
  3. Baker BROS. Advisors LP — 2.89%
  4. UBS Group AG — 2.21%
  5. Cantor Fitzgerald L. P. — 1.47%
  6. Cantor Fitzgerald L. P. — 1.47%
Learn More about top institutional investors of Generation Bio stock.

Which institutional investors are selling Generation Bio stock?

In the previous quarter, GBIO stock was sold by these institutional investors:
  1. Atlas Venture Life Science Advisors LLC
  2. Vanguard Group Inc.
  3. Baker BROS. Advisors LP
  4. Millennium Management LLC
  5. Bank of America Corp DE
  6. UBS Group AG
  7. TD Asset Management Inc
  8. Citadel Advisors LLC

Which institutional investors are buying Generation Bio stock?

In the last quarter, GBIO stock was purchased by institutional investors including:
  1. Cantor Fitzgerald L. P.
  2. Cantor Fitzgerald L. P.
  3. ADAR1 Capital Management LLC
  4. Shay Capital LLC
In the last year, these company insiders have bought Generation Bio stock:
  1. Anthony G Quinn (Director)
  2. Antoinette Paone (COO)
Learn More investors buying Generation Bio stock.