Assembly Biosciences Ownership | Who Owns Assembly Biosciences?

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Assembly Biosciences Ownership Summary

Assembly Biosciences is owned by 46.72% institutional investors, 32.38% insiders, and 20.91% retail investors. Gilead sciences is the largest institutional shareholder, holding 40.19% of ASMB shares. Vanguard Morn Total Stk Mkt Idx Investor is the top mutual fund, with 2.09% of its assets in Assembly Biosciences shares.

ASMB Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Assembly Biosciences	46.72%	32.38%	20.91%
Sector	Healthcare Stocks	35.56%	12.08%	52.36%
Industry	Biotech Stocks	35.43%	12.01%	52.56%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Gilead sciences	4.51M	40.19%	$125.02M
Farallon capital management	1.23M	10.95%	$34.07M
Ra capital management	1.02M	9.10%	$28.32M
Commodore capital lp	1.00M	8.92%	$27.75M
Janus henderson group	849.31K	7.58%	$23.48M
Vanguard group	572.90K	7.48%	$19.48M
Paradigm biocapital advisors lp	665.25K	5.93%	$18.46M
Parkman healthcare partners	411.23K	3.67%	$11.41M
Point72 asset management	344.11K	3.07%	$9.55M
Blackstone	296.86K	2.65%	$8.24M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Gilead sciences	4.51M	5.90%	$125.02M
B group	175.71K	3.61%	$4.88M
Commodore capital lp	1.00M	1.61%	$27.75M
Parkman healthcare partners	411.23K	1.18%	$11.41M
Stempoint capital lp	185.44K	1.00%	$5.15M
Patient square capital lp	136.31K	0.67%	$3.78M
Highvista strategies	74.73K	0.57%	$2.07M
Paradigm biocapital advisors lp	665.25K	0.38%	$18.46M
Monimus capital management, lp	48.39K	0.37%	$1.34M
Ra capital management	1.02M	0.30%	$28.32M

Top Buyers

Holder	Shares	% Assets	Change
Parkman healthcare partners	411.23K	1.18%	161.87K
Millennium management	233.65K	0.00%	135.43K
Highvista strategies	74.73K	0.57%	74.73K
Vanguard fiduciary trust	71.61K	0.00%	71.61K
Vanguard group	572.90K	0.00%	70.79K

Top Sellers

Holder	Shares	% Assets	Change
Frazier life sciences management	-	-	-456.25K
Point72 asset management	344.11K	0.01%	-256.50K
Franklin resources	-	-	-210.53K
Eversept partners, lp	40.89K	0.06%	-118.79K
Superstring capital management lp	-	-	-65.27K

New Positions

Holder	Shares	% Assets	Change	Value
Highvista strategies	74.73K	0.57%	74.73K	$2.07M
Vanguard fiduciary trust	71.61K	0.00%	71.61K	$1.99M
Bioimpact capital	39.66K	0.17%	39.66K	$1.02M
Wellington management group llp	26.50K	0.00%	26.50K	$735.26K
Squarepoint ops	23.80K	0.00%	23.80K	$660.56K

Sold Out

Holder	Change
Frazier financial advisors	-1.00
Quadrant capital group	-22.00
Royal bank of canada	-53.00
Fifth third bancorp	-57.00
Sbi securities	-68.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2026	17	-75.36%	5,237,283	-61.84%	46	0.15%	10	-77.27%	4	-71.43%
Dec 31, 2025	36	-38.98%	6,388,221	-48.82%	83	0.31%	23	-50.00%	7	75.00%
Sep 30, 2025	43	26.47%	9,347,787	196.88%	122	7.22%	30	130.77%	4	-50.00%
Jun 30, 2025	34	-5.56%	3,148,666	-0.85%	41	2.30%	13	-18.75%	8	-20.00%
Mar 31, 2025	36	2.86%	3,175,639	-0.32%	42	1.81%	16	-23.81%	10	42.86%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard Morn Total Stk Mkt Idx Investor	413.28K	2.09%	65.40K
Vanguard Total Stock Mkt Idx Inv	413.28K	2.09%	65.40K
Vanguard US Total Market Shares ETF	114.78K	1.53%	-
iShares Russell 2000 ETF	239.71K	1.21%	-4.22K
Vanguard Institutional Extnd Mkt Idx Tr	133.23K	0.67%	7.61K
abrdn Healthcare Investors	129.71K	0.65%	50.11K
iShares Russell 2000 Value ETF	87.84K	0.44%	-
abrdn Life Sciences Investors	77.34K	0.39%	37.74K
Franklin Biotechnology Discv A(acc)USD	72.22K	0.36%	-
Russell 2000 Index Non-Lendable Fund	64.15K	0.32%	64.15K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Jun 17, 2026	Bjorkquist Jeanette M	PFO and PAO	Sell	$674.25
Mar 30, 2026	Bjorkquist Jeanette M	PFO and PAO	Sell	$439.84
Mar 30, 2026	Bjorkquist Jeanette M	PFO and PAO	Sell	$8.31K
Mar 30, 2026	White Nicole S	Chief Manufacturing Officer	Sell	$247.41
Mar 30, 2026	White Nicole S	Chief Manufacturing Officer	Sell	$5.01K

Insider Transactions Trends

Date	Buy	Sell
2026 Q2	-	1
2026 Q1	-	4
2025 Q3	3	-
2025 Q2	-	-
2025 Q1	-	4

ASMB Ownership FAQ

Who Owns Assembly Biosciences?

Assembly Biosciences shareholders are primarily institutional investors at 46.72%, followed by 32.38% insiders and 20.90% retail investors. The average institutional ownership in Assembly Biosciences's industry, Biotech Stocks , is 35.43%, which Assembly Biosciences exceeds.

Who owns the most shares of Assembly Biosciences?

Assembly Biosciences’s largest shareholders are Gilead sciences (4.51M shares, 40.19%), Farallon capital management (1.23M shares, 10.95%), and Ra capital management (1.02M shares, 9.10%). Together, they hold 60.24% 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 5.90% of its assets in 4.51M Assembly Biosciences shares, valued at 125.02M$.

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

Vanguard Morn Total Stk Mkt Idx Investor is the top mutual fund holder of Assembly Biosciences shares, with 2.09% of its total shares outstanding invested in 413.28K Assembly Biosciences shares.

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