Assembly Biosciences ASMB Institutional Ownership

NASDAQ ASMB

$20.46 -0.73 (-3.45%)

At close: Oct 21, 2026 · 4:00 PM EDT

Institutions by Trading Activity

93 Institutions

Increased 69 74.2%

Unchanged 6 6.5%

Reduced 18 19.4%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

94.46%

▲+14.17 pp QoQ

Shares Held by Institutions

18.75Mn

of 19.85Mn outstanding

▲+38.19% QoQ

Shares Outstanding

19.85Mn

1.10Mn held outside 13F filers

Institutional Investors

filed 13F for Jun 2026

▲+19 vs prior quarter

Net Shares Added (QoQ)

+5.18Mn

accumulated since last quarter

Value of Holdings

$397.31Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 10, 2026

Assembly Biosciences, Inc. (NASDAQ:ASMB) had 93 institutional holders reporting a position on Form 13F for the quarter ended June 30, 2026.

Together they owned 94.46% of the outstanding stock in Q2 2026, up from 80.29% a quarter earlier.
Total holdings of ASMB shares rose 38.19% from Q1 2026, and the holder count rose 200.00% from Q2 2025.
Of the 93 holders, 69 added to their positions, 18 reduced their stakes and 6 left their positions unchanged in Q2 2026.
Combined, institutional investors held 18.75Mn shares of ASMB as of Q2 2026, up 5.18Mn from the prior quarter and up 15.64Mn from a year earlier.
As of June 30, 2026, Gilead Sciences, Inc. held the largest stake in Assembly Biosciences with 4.98Mn shares, or 25.07% of shares outstanding.
The biggest increases in ASMB positions during Q2 2026 came from Paradigm Biocapital Advisors LP (+888.5K shares), BlackRock, Inc. (+564.08K shares), Gilead Sciences, Inc. (+471.7K shares), Commodore Capital LP (+415K shares) and Farallon Capital Management, L.L.C. (+377K shares).
The biggest cuts to ASMB positions during Q2 2026 came from Marshall Wace, LLP (-145.66K shares), Caption Management, LLC (-59.01K shares), Eversept Partners, LP (-24.38K shares), Barclays PLC (-20.92K shares) and Qube Research & Technologies Ltd (-17.77K shares).
According to Business Quant data, the leading holders of ASMB for Q2 2026 were Gilead Sciences, Inc. (4.98Mn shares), Farallon Capital Management, L.L.C. (1.6Mn shares), Paradigm Biocapital Advisors LP (1.55Mn shares), Commodore Capital LP (1.42Mn shares), Ra Capital Management, L.P. (1.02Mn shares), Jupiter Topco LLC (849.31K shares), BlackRock, Inc. (766.82K shares), Parkman Healthcare Partners LLC (721.18K shares), Vanguard Capital Management LLC (558.94K shares) and Point72 Asset Management, L.P. (460.59K shares).

Form 13F Holdings

93 Institutional Holders

Report period 30 Jun, 2026

Total shares held 18.75Mn

Of outstanding 94.46%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	Gilead Sciences, Inc.	0000882095	4,977,089	25.07%	▲471,698	+10.47%	$136.77Mn
2	FARALLON CAPITAL MANAGEMENT, L.L.C.	0000909661	1,604,590	8.08%	▲377,000	+30.71%	$44.09Mn
3	Paradigm Biocapital Advisors LP	0001855655	1,553,748	7.83%	▲888,497	+133.56%	$42.70Mn
4	Commodore Capital LP	0001831942	1,415,000	7.13%	▲415,000	+41.50%	$38.88Mn
5	RA CAPITAL MANAGEMENT, L.P.	0001346824	1,020,410	5.14%	0	0.00%	$28.04Mn
6	Jupiter Topco LLC	0002146052	849,309	4.28%	▲849,309	0.00%	$23.37Mn
7	BlackRock, Inc.	0002012383	766,819	3.86%	▲564,076	+278.22%	$21.07Mn
8	Parkman Healthcare Partners LLC	0001777015	721,181	3.63%	▲309,954	+75.37%	$19.82Mn
9	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	558,942	2.82%	▲68,495	+13.97%	$15.36Mn
10	Point72 Asset Management, L.P.	0001603466	460,593	2.32%	▲116,488	+33.85%	$12.66Mn
11	Seven Fleet Capital Management LP	0002092021	433,147	2.18%	▲377,000	+671.45%	$11.90Mn
12	MILLENNIUM MANAGEMENT LLC	0001273087	298,807	1.51%	▲65,157	+27.89%	$8.21Mn
13	GEODE CAPITAL MANAGEMENT, LLC	0001214717	280,424	1.41%	▲147,453	+110.89%	$7.71Mn
14	Schonfeld Strategic Advisors LLC	0001665241	242,153	1.22%	▲121,653	+100.96%	$6.65Mn
15	Ameriprise Financial Inc	0000820027	230,000	1.16%	▲230,000	0.00%	$6.32Mn
16	DV EQUITIES, LLC	0001841659	226,415	1.14%	▲226,415	0.00%	$6.22Mn
17	Aberdeen Group plc	0001716774	207,047	1.04%	▲207,047	0.00%	$5.69Mn
18	Affinity Asset Advisors, LLC	0001773195	190,000	0.96%	▲190,000	0.00%	$5.22Mn
19	B Group, Inc.	0002043476	175,706	0.89%	0	0.00%	$4.83Mn
20	State Street Corp	0000093751	171,931	0.87%	▲115,242	+203.29%	$4.72Mn

Showing 1 to 20 of 93 holders