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Generation Bio Ownership | Who Owns Generation Bio?

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Generation Bio Ownership Summary

Generation Bio is owned by 11.57% institutional investors, 14.29% insiders, and 74.14% retail investors. Blackrock is the largest institutional shareholder, holding 4.96% of GBIO shares. US Small-Cap Growth II Equity Comp is the top mutual fund, with 7.09% of its assets in Generation Bio shares.

GBIO Ownership Benchmark

TypeName% Inst% Insiders% Retail
StockGeneration Bio11.57%14.29%74.14%
SectorHealthcare Stocks 232.01%10.74%-142.75%
IndustryBiotech Stocks 381.47%10.55%-292.02%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

HolderShares% HoldingValue
Blackrock3.29M4.96%$9.29M
Bank of america corp /de/2.98M4.49%$8.41M
Renaissance287.61K4.27%$1.63M
Artal group2.83M4.26%$7.98M
Vanguard group229.83K3.41%$1.31M
Ubs group164.72K2.45%$935.59K
Morgan stanley161.38K2.40%$916.63K
Acadian asset management121.03K1.80%$686.00K
Goldman sachs group91.53K1.36%$519.87K
Blackrock funding, inc. /de60.07K0.89%$341.20K

Top Institutional Shareholders by % of Total Assets

HolderShares% AssetsValue
Artal group2.83M0.20%$7.98M
Deltec asset management32.65K0.03%$185.45K
Palo alto investors lp15.05K0.02%$92.09K
Accent capital management38.000.01%$23.37K
Drw securities43.81K0.01%$248.85K
Abel hall23.57K0.00%$7.54K
Renaissance287.61K0.00%$1.63M
Acadian asset management121.03K0.00%$686.00K
Bank of america corp /de/2.98M0.00%$8.41M
Cubist systematic strategies19.05K0.00%$53.71K

Top Buyers

HolderShares% AssetsChange
Blackrock3.29M0.00%245.40K
Wellington management group llp119.36K0.00%119.36K
Drw securities43.81K0.01%43.81K
Deltec asset management32.65K0.03%32.65K
Abel hall23.57K0.00%23.57K

Top Sellers

HolderShares% AssetsChange
Price t rowe associates inc /md/---8.46M
Bellevue group---3.92M
Siren---2.97M
Fmr---2.35M
Ecor1 capital---2.05M

New Positions

HolderShares% AssetsChangeValue
Wellington management group llp119.36K0.00%119.36K$336.58K
Drw securities43.81K0.01%43.81K$248.85K
Deltec asset management32.65K0.03%32.65K$185.45K
Abel hall23.57K0.00%23.57K$7.54K
Susquehanna group, llp22.79K-22.79K$24.16K

Sold Out

HolderChange
Nelson, van denburg & campbell wealth management group-9.00
Eversource wealth advisors-27.00
Srs capital advisors-38.00
Capital performance advisors llp-45.00
Gamma investing-50.00

Institutional Ownership Trends

DateHoldingsChange %SharesChange %OwnershipChange %Increased PositionChange %Decreased PositionChange %
Dec 31, 202511-71.79%779,217-80.37%110.33%4-50.00%4-86.21%
Sep 30, 20251-98.31%38-100.00%----100.00%--100.00%
Jun 30, 202558-28.40%41,332,3174.83%611.78%23-4.17%25-34.21%
Mar 31, 2025821.23%47,707,211-11.41%711.09%24-38.46%38100.00%
Dec 31, 202420-73.33%12,890,700-76.66%190.28%7-73.08%5-81.48%

Top Mutual Funds Shareholders

HolderShares% HoldingChange
US Small-Cap Growth II Equity Comp4.76M7.09%-509.39K
T. Rowe Price New Horizons475.51K7.06%-1.00
BB Biotech AG Ord3.92M5.87%-
Fidelity Growth Compy Commingled Pl O1.94M2.91%-
Vanguard US Total Market Shares ETF1.56M2.32%-
Vanguard Total Stock Mkt Idx Inv152.41K2.26%-
T. Rowe Price Health Sciences111.48K1.65%-8.76K
T. Rowe Price New Horizons Tr-Z1.04M1.56%2.03K
Fidelity Growth Company Fund972.42K1.45%-380.52K
Fidelity Growth Compy Commingled Pl S873.41K1.30%-461.25K

Recent Insider Transactions

DateNameRoleActivityValue
Jan 10, 2025Quinn Anthony G.-Buy$120.76K
Jan 13, 2025Quinn Anthony G.-Buy$82.45K
Jul 01, 2024Paone Antoinette CHIEF OPERATING OFFICERSell$18.41K
Jan 02, 2024Paone Antoinette CHIEF OPERATING OFFICERSell$3.96K
Jan 02, 2024Samayoa Phillip CHIEF STRATEGY OFFICERSell$3.96K

Insider Transactions Trends

DateBuySell
2026 Q1--
2025 Q4--
2025 Q3--
2025 Q2--
2025 Q12-

GBIO Ownership FAQ

Who Owns Generation Bio?

Generation Bio shareholders are primarily institutional investors at 11.57%, followed by 14.29% insiders and 74.14% retail investors. The average institutional ownership in Generation Bio's industry, Biotech Stocks , is 381.47%, which Generation Bio falls below.

Who owns the most shares of Generation Bio?

Generation Bio’s largest shareholders are Blackrock (3.29M shares, 4.96%), Bank of america corp /de/ (2.98M shares, 4.49%), and Renaissance (287.61K shares, 4.27%). Together, they hold 13.72% of Generation Bio’s total shares outstanding.

Does Blackrock own Generation Bio?

Yes, BlackRock owns 4.96% of Generation Bio, totaling 3.29M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 9.29M$. In the last quarter, BlackRock increased its holdings by 245.4K shares, a 8.05% change.

Who is Generation Bio’s biggest shareholder by percentage of total assets invested?

Artal group is Generation Bio’s biggest shareholder by percentage of total assets invested, with 0.20% of its assets in 2.83M Generation Bio shares, valued at 7.98M$.

Who is the top mutual fund holder of Generation Bio shares?

US Small-Cap Growth II Equity Comp is the top mutual fund holder of Generation Bio shares, with 7.09% of its total shares outstanding invested in 4.76M Generation Bio shares.

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