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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
Phillip SamayoaCHIEF SCIENTIFIC OFFICER2025-10-1534$6.71
$228.14Sell
Kevin John ConwayChief Financial Officer2025-10-1518$6.71
$120.78Sell
Yalonda HowzeCHIEF LEGAL OFFICER2025-10-1599$6.71
$664.29Sell
Geoff McDonoughPRESIDENT AND CEO2025-10-15155$6.71
$1.04kSell
Antoinette PaoneCHIEF OPERATING OFFICER2025-10-1547$6.71
$315.37Sell
Geoff McDonoughPRESIDENT AND CEO2025-07-151,548$0.43
$659.45Sell
Phillip SamayoaCHIEF SCIENTIFIC OFFICER2025-07-15337$0.43
$143.56Sell
Antoinette PaoneCHIEF OPERATING OFFICER2025-07-15468$0.43
$199.37Sell
Kevin John ConwayChief Financial Officer2025-07-15173$0.43
$73.70Sell
Yalonda HowzeCHIEF LEGAL OFFICER2025-07-15983$0.43
$418.76Sell

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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
Price T Rowe Associates Inc125.64%8,462,611$53.40MInstitution
Atlas Venture Life Science Advisors LLC122.92%8,279,484$52.24MInstitution
Atlas Venture Fund X LP122.91%8,278,876$52.24MInsider
Zone Healthcare Holdings LLC56.98%3,837,638$24.22MInsider
William Seybold56.98%3,837,638$24.22MInsider
Siren LLC44.08%2,968,925$18.73MInstitution
Invus Public Equities LP41.78%2,814,191$17.76MInsider
Renaissance Technologies LLC38.32%2,580,780$16.28MInstitution
Fmr LLC34.82%2,345,624$14.80MInstitution
Vanguard Group Inc34.12%2,298,347$14.50MInstitution

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GBIO vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
GBIO58.82%41.18%Net BuyingNet Selling
HYPD0.72%99.28%
LTRN20.75%62.01%Net Selling
GRCE27.60%50.93%
RNXT24.00%11.42%Net BuyingNet Buying
View Top Biotech Stocks

Generation Bio Co Stock Ownership FAQ

Who owns Generation Bio Co?

Generation Bio Co (NASDAQ: GBIO) is owned by 615.61% institutional shareholders, 431.02% 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 122.91% of the company. Atlas Venture Fund X LP's Generation Bio Co shares are currently valued at $53.07M.

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