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NASDAQ: GBIO
Generation Bio Co Stock Ownership - Who owns Generation Bio Co?

OverviewForecastEarningsRevenueDividendOwnership

Insider buying vs selling

Have Generation Bio Co insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Kevin John ConwayChief Financial Officer2026-02-0272$5.64
$406.08Sell
Yalonda HowzeINTERIM CEO PRESIDENT2026-02-02495$5.64
$2.79kSell
Geoff McDonoughDirector2026-02-02550$5.64
$3.10kSell
Kevin John ConwayChief Financial Officer2026-01-1517$5.64
$95.88Sell
Geoff McDonoughDirector2026-01-15137$5.64
$772.68Sell
Yalonda HowzeCHIEF LEGAL OFFICER2026-01-1599$5.64
$558.36Sell
Geoff McDonoughDirector2025-10-31293$5.51
$1.61kSell
Kevin John ConwayChief Financial Officer2025-10-1518$6.71
$120.78Sell
Phillip SamayoaCHIEF SCIENTIFIC OFFICER2025-10-1534$6.71
$228.14Sell
Geoff McDonoughPRESIDENT AND CEO2025-10-15155$6.71
$1.04kSell

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Net Insider Buy/Sell (L12M) Ownership

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GBIO Shareholders

What type of owners hold Generation Bio Co stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Atlas Venture Fund X LP122.87%8,278,876$46.53MInsider
Zone Healthcare Holdings LLC56.96%3,837,638$21.57MInsider
William Seybold56.96%3,837,638$21.57MInsider
Invus Public Equities LP41.77%2,814,191$15.82MInsider
Wellington Biomedical Innovation Master Investors Cayman I LP31.35%2,112,546$11.87MInsider
Casdin Capital LLC23.91%1,611,215$9.06MInsider
James E. Flynn17.61%1,186,215$6.67MInsider
Jason P. Rhodes17.32%1,166,937$6.56MInsider
Atlas Venture Associates X LP17.32%1,166,937$6.56MInsider
Atlas Venture Life Science Advisors LLC12.29%827,946$4.65MInstitution

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GBIO vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
GBIO12.03%87.97%Net SellingNet Selling
TELO6.78%24.95%
ABVC3.23%86.53%
INMB17.50%27.83%
ALGS6.48%93.52%
View Top Biotech Stocks

Generation Bio Co Stock Ownership FAQ

Who owns Generation Bio Co?

Generation Bio Co (NASDAQ: GBIO) is owned by 58.91% institutional shareholders, 430.92% Generation Bio Co insiders, and 0.00% retail investors. Atlas Venture Fund X LP is the largest individual Generation Bio Co shareholder, owning 8.28M shares representing 122.87% of the company. Atlas Venture Fund X LP's Generation Bio Co shares are currently valued at $47.52M.

If you're new to stock investing, here's how to buy Generation Bio Co stock.
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