Assembly Biosciences, Inc. (ASMB)
Nasdaq: ASMB · Pharmaceutical Preparations · South San Francisco, CA · filing with the SEC since 2008
Who owns Assembly Biosciences, Inc.
As filed with the SECHolders of 5% or more
7
Gilead Sciences, Inc. holds 25.1% of Common Stock, par value $0.001, as its SCHEDULE 13D/A filed May 27, 2026 says.
Directors and officers
11
report now, of 30 people on the record since 2010. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 7 named at left.
Holders of 5% or moreshare of the class, as filed
Gilead Sciences, Inc.
SCHEDULE 13D/A · filed May 27, 2026 · Common Stock, par value $0.001 · 29% in Aug 12, 2025
Commodore Capital LP
SCHEDULE 13G · filed Aug 15, 2025 · Common Stock, par value $0.001
RA Capital Management, L.P.
SCHEDULE 13G · filed Aug 18, 2025 · Common Stock, par value $0.001 per share
Farallon Capital Management, L.L.C.
SCHEDULE 13G/A · filed Aug 4, 2026 · Common Stock, par value $0.001 per shares (the "Shares")
Paradigm BioCapital Advisors LP
SCHEDULE 13G/A · filed Aug 14, 2026 · Common Stock, $0.001 par value per share · 5.4% in May 11, 2026
Dapice Joshua J.
SCHEDULE 13G/A · filed Feb 9, 2026 · Common Stock, par value $0.001 per shares (the "Shares") · 7.3% in Aug 15, 2025
JANUS HENDERSON GROUP Ltd.
SCHEDULE 13G/A · filed Aug 13, 2026 · Common Stock · 8.2% in Dec 8, 2025
Armistice Capital, LLC
SCHEDULE 13G/A · filed Feb 14, 2025 · Common Stock, par value $0.001 · reported falling below 5%
Alexander Schornstein
SCHEDULE 13G/A · filed Aug 18, 2025 · Common Stock, par value $0.001 · reported falling below 5%, from 4.68% in Aug 12, 2025
What ASMB reports owning in othersstakes of 5% or more, and other ties
3 subsidiaries in 3 countries, from the list filed with the 10-K filed Mar 20, 2025.
Insider tradesForm 4
13sales
0purchases
0sales on a scheduled plan
4people selling
$300,000sold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Nov 3, 2025 to Nov 3, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Nov 3, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window4 of 33 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Okazaki Jason A | CEO and President | 2 | $100,000 | 0 | 0 | $0 |
| Gaggar Anuj | Chief Medical Officer | 2 | $100,000 | 0 | 0 | $0 |
| White Nicole S | Chief Manufacturing Officer | 4 | $100,000 | 0 | 0 | $0 |
| Bjorkquist Jeanette M | PFO and PAO | 5 | $0 | 0 | 0 | $0 |