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Assembly Biosciences Ownership | Who Owns Assembly Biosciences?

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Assembly Biosciences Ownership Summary

Assembly Biosciences is owned by 122.10% institutional investors, 32.30% insiders. Gilead sciences is the largest institutional shareholder, holding 58.85% of ASMB shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 2.01% of its assets in Assembly Biosciences shares.

ASMB Ownership Benchmark

TypeName% Inst% Insiders% Retail
StockAssembly Biosciences122.10%32.30%-54.40%
SectorHealthcare Stocks 42.53%10.81%46.67%
IndustryBiotech Stocks 45.24%10.75%44.01%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

HolderShares% HoldingValue
Gilead sciences4.51M58.85%$115.34M
Farallon capital management1.23M16.03%$31.43M
Ra capital management1.02M13.33%$26.12M
Commodore capital lp1.00M13.06%$25.60M
Vanguard group502.11K6.56%$12.85M
Frazier life sciences management456.25K5.96%$11.68M
Blackstone447.79K5.85%$11.46M
Point72 asset management296.02K3.87%$7.58M
Parkman healthcare partners250.98K3.28%$6.43M
Franklin resources238.17K3.11%$11.41M

Top Institutional Shareholders by % of Total Assets

HolderShares% AssetsValue
Gilead sciences4.51M6.44%$115.34M
B group175.71K3.31%$4.50M
Commodore capital lp1.00M1.25%$25.60M
Patient square capital lp135.18K0.93%$3.46M
Parkman healthcare partners250.98K0.67%$6.43M
Monimus capital management, lp42.07K0.66%$1.08M
Frazier life sciences management456.25K0.35%$11.68M
Stempoint capital lp66.13K0.34%$1.69M
Ra capital management1.02M0.32%$26.12M
Palumbo wealth management34.80K0.28%$890.83K

Top Buyers

HolderShares% AssetsChange
Gilead sciences4.51M6.44%2.30M
Farallon capital management1.23M0.13%1.23M
Ra capital management1.02M0.32%1.02M
Commodore capital lp1.00M1.25%1.00M
Frazier life sciences management456.25K0.35%456.25K

Top Sellers

HolderShares% AssetsChange
Armistice capital---23.86K
Squarepoint ops---18.98K
B group175.71K3.31%-13.64K
Man group---13.23K
American century companies---11.80K

New Positions

HolderShares% AssetsChangeValue
Farallon capital management1.23M0.13%1.23M$31.43M
Ra capital management1.02M0.32%1.02M$26.12M
Commodore capital lp1.00M1.25%1.00M$25.60M
Frazier life sciences management456.25K0.35%456.25K$11.68M
Blackstone447.79K0.05%447.79K$11.46M

Sold Out

HolderChange
Frazier financial advisors-1.00
Royal bank of canada-53.00
Ameriflex group-83.00
Tower research capital llc (trc)-250.00
Raymond james financial-250.00

Institutional Ownership Trends

DateHoldingsChange %SharesChange %OwnershipChange %Increased PositionChange %Decreased PositionChange %
Sep 30, 20254326.47%9,347,787196.88%1227.22%30130.77%4-50.00%
Jun 30, 202534-5.56%3,148,666-0.85%412.30%13-18.75%8-20.00%
Mar 31, 2025362.86%3,175,639-0.32%421.81%16-23.81%1042.86%
Dec 31, 20243516.67%3,185,761210.20%4818.52%2161.54%7-
Sep 30, 2024307.14%1,026,987-12.62%163.73%13-13.33%740.00%

Top Mutual Funds Shareholders

HolderShares% HoldingChange
Vanguard Total Stock Mkt Idx Inv127.52K2.01%-2.79K
Vanguard US Total Market Shares ETF114.78K1.53%-
Vanguard Institutional Extnd Mkt Idx Tr68.61K1.08%-32.59K
Franklin Biotechnology Discv A(acc)USD166.20K1.07%166.20K
Federated Hermes MDT Small Cap Growth IS25.39K0.33%-
Federated Hermes MDT SCG Institutional25.39K0.33%-
Vanguard Strategic Small-Cap Equity Inv17.72K0.23%-
Bridgeway Ultra-Small Company Market13.75K0.22%-
Fidelity Extended Market Index27.00K0.17%4.20K
Extended Equity Market Fund K13.08K0.17%8.11K

Recent Insider Transactions

DateNameRoleActivityValue
Aug 08, 2025GILEAD SCIENCES, INC.-Buy$2.30K
Aug 08, 2025GILEAD SCIENCES, INC.-Buy$24.80M
Aug 08, 2025GILEAD SCIENCES, INC.-Buy$24.80M
Mar 31, 2025McHutchison John G-Sell$7.46K
Mar 31, 2025Bjorkquist Jeanette M Principal Accounting OfficerSell$1.77K

Insider Transactions Trends

DateBuySell
2025 Q2--
2025 Q1-4
2024 Q463
2024 Q322
2024 Q2210

ASMB Ownership FAQ

Who Owns Assembly Biosciences?

Assembly Biosciences shareholders are primarily institutional investors at 122.10%, followed by 32.30% insiders and -54.40% retail investors. The average institutional ownership in Assembly Biosciences's industry, Biotech Stocks , is 45.24%, which Assembly Biosciences exceeds.

Who owns the most shares of Assembly Biosciences?

Assembly Biosciences’s largest shareholders are Gilead sciences (4.51M shares, 58.85%), Farallon capital management (1.23M shares, 16.03%), and Ra capital management (1.02M shares, 13.33%). Together, they hold 88.21% of Assembly Biosciences’s total shares outstanding.

Does Blackrock own Assembly Biosciences?

BlackRock is not among the top 10 institutional shareholders of Assembly Biosciences.

Who is Assembly Biosciences’s biggest shareholder by percentage of total assets invested?

Gilead sciences is Assembly Biosciences’s biggest shareholder by percentage of total assets invested, with 6.44% of its assets in 4.51M Assembly Biosciences shares, valued at 115.34M$.

Who is the top mutual fund holder of Assembly Biosciences shares?

Vanguard Total Stock Mkt Idx Inv is the top mutual fund holder of Assembly Biosciences shares, with 2.01% of its total shares outstanding invested in 127.52K Assembly Biosciences shares.

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