ASMB Assembly Biosciences, Inc.

NASDAQ
$20.42

Assembly Biosciences, Inc. (ASMB) Institutional Ownership

What the institutions did with ASMB last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended September 30, 2026.

Managers compared
18
filed both this quarter and last
Managers holding
17
+5 on the quarter
Buyers
13
6 opened new
Sellers
2
1 sold out entirely
Buyer share
86.7%
of managers who traded it
Breadth
+73.3
net buyers, as a share of those trading

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Ownership map

Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.

Cut Unchanged Added Color saturates at ±50%.

Largest holders

Manager Shares % of reported
GILEAD SCIENCES, INC. 5.0M 92.0%
GEODE CAPITAL MANAGEMENT, LLC 361.2K 6.7%
Bank of New York Mellon Corp 33.0K 0.6%
BARCLAYS PLC 16.8K 0.3%
DEUTSCHE BANK AG\ 11.2K 0.2%
CITIGROUP INC 5.6K 0.1%
State of Alaska, Department of Revenue 989 0.0%
Russell Investments Group, Ltd. 788 0.0%
SIMPLEX TRADING, LLC 480 0.0%
Sterling Capital Management LLC 260 0.0%
EverSource Wealth Advisors, LLC 59 0.0%
Parkside Financial Bank & Trust 54 0.0%
GAMMA Investing LLC 20 0.0%
Caitong International Asset Management Co., Ltd 14 0.0%
Allworth Financial LP 10 0.0%
PNC Financial Services Group, Inc. 5 0.0%
Root Financial Partners, LLC 1 0.0%

Largest changes

Manager Action Previous Current Change
Aberdeen Group plc Sold Out 207.0K 0 -207.0K
GEODE CAPITAL MANAGEMENT, LLC Increased 280.4K 361.2K +80.7K
BARCLAYS PLC Increased 6.1K 16.8K +10.7K
Bank of New York Mellon Corp Increased 24.0K 33.0K +9.0K
DEUTSCHE BANK AG\ Increased 9.6K 11.2K +1.6K
CITIGROUP INC Increased 4.6K 5.6K +1.0K
State of Alaska, Department of Revenue New 0 989 +989
SIMPLEX TRADING, LLC New 0 480 +480
Caitong International Asset Management Co., Ltd Reduced 75 14 -61
Sterling Capital Management LLC Increased 199 260 +61
Parkside Financial Bank & Trust New 0 54 +54
GAMMA Investing LLC New 0 20 +20
PNC Financial Services Group, Inc. New 0 5 +5
EverSource Wealth Advisors, LLC Increased 55 59 +4
Root Financial Partners, LLC New 0 1 +1

13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.