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Buy Day today: Neutral (51) Mixed market breadth · no major macro event
ASMB

Assembly Biosciences Inc

Healthcare · Biotechnology

25.00$ -1.5% vs. previous close Closing price · As of: Sep 18, 2026

Ownership

Ownership Structure

Who owns Assembly Biosciences Inc (ASMB)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 45.1% of the shares are freely tradable; institutional investors hold 48.4%.

Institutional ownership ?Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings. 48.4%
Insiders ?Share of the stock held by the executives, founders and major shareholders of the company itself. 28.4%
Float ?Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders. 45.1%
Short % of float ?Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices. 13.9%
Shares Outstanding ?Total number of shares issued. Price times share count gives market cap. 20Mio.

Largest Shareholders

Institutions

Institutions ASMB
Name Stake (%) Shares Change (%) Date
Paradigm Biocapital Advisors LP 7.83 1,553,748 +133.6 06/30/2026
Farallon Capital Management, L.L.C. 6.18 1,227,590 +0.0 03/31/2026
RA Capital Management, LLC 5.14 1,020,410 +0.0 03/31/2026
COMMODORE CAPITAL LP 5.04 1,000,000 +0.0 03/31/2026
HHG PLC 4.28 849,309 +1.4 03/31/2026
Parkman Healthcare Partners LLC 3.63 721,181 +75.4 06/30/2026
Vanguard Capital Management, LLC 2.47 490,447 +0.0 03/31/2026
StemPoint Capital LP 1.87 370,870 +136.6 03/31/2026
Point72 Asset Management, L.P. 1.73 344,105 -42.7 03/31/2026

Funds

Funds ASMB
Name Stake (%) Shares Change (%) Date
Vanguard MStar Total Stk Mkt Idx Invest 2.08 413,284 +0.0 07/31/2026

Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.

Data as of: September 18, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)

Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.

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