ASMB offering history
Every offering-related filing in ASSEMBLY BIOSCIENCES, INC.’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 893 filings back to Feb 7, 2008.
| Date | Filing | What it means | |
|---|---|---|---|
| May 26, 2026 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| May 22, 2026 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Mar 27, 2026 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Mar 19, 2026 | S-3 → | REGISTERED | S-3 registration — capacity to sell shares, not a sale yet |
| Nov 21, 2025 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Nov 21, 2025 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Oct 14, 2025 | S-3 → | REGISTERED | S-3 registration — capacity to sell shares, not a sale yet |
| Aug 11, 2025 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Aug 11, 2025 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Aug 11, 2025 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Aug 7, 2025 | S-3MEF → | REGISTERED | S-3MEF registration — capacity to sell shares, not a sale yet |
| Apr 1, 2025 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Mar 20, 2025 | S-3 → | REGISTERED | S-3 registration — capacity to sell shares, not a sale yet |
| Dec 19, 2024 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Nov 7, 2024 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Jun 18, 2024 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Jun 18, 2024 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Oct 17, 2023 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Apr 14, 2023 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Mar 22, 2023 | S-3 → | REGISTERED | S-3 registration — capacity to sell shares, not a sale yet |
| Sep 4, 2020 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Aug 28, 2020 | S-3 → | REGISTERED | S-3 registration — capacity to sell shares, not a sale yet |
| Dec 13, 2019 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Dec 11, 2019 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Jul 13, 2018 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Jul 10, 2018 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Jan 10, 2018 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Dec 29, 2017 | S-3 → | REGISTERED | S-3 registration — capacity to sell shares, not a sale yet |
| Nov 3, 2017 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Nov 1, 2017 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Jan 19, 2016 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Dec 30, 2015 | S-3 → | REGISTERED | S-3 registration — capacity to sell shares, not a sale yet |
| Mar 20, 2015 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Mar 18, 2015 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Jan 15, 2015 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Nov 26, 2014 | S-3 → | REGISTERED | S-3 registration — capacity to sell shares, not a sale yet |
| Oct 1, 2014 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Oct 1, 2014 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Jul 14, 2014 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Sep 13, 2013 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
Two honest limits. (1) A 424B takedown can price shares or notes — EDGAR’s metadata doesn’t say which, so open the document: large investment-grade filers use these mostly for bond deals (no dilution), small-caps mostly for shares. (2) At-the-market (ATM) programs sell shares gradually and individual sales are not separately filed — the visible footprint is the enabling shelf and its 424B5; actual ATM share counts surface later in the 10-Q/10-K share count. Educational information from public filings, not investment advice.
ASMB offering FAQ
When did ASMB last execute an offering?
Per SEC filings, ASSEMBLY BIOSCIENCES, INC.'s most recent priced offering document is a 424B5 filed 2026-05-26. Note a 424B takedown can price shares or notes (debt) — the linked document says which.
When did ASMB last announce or register an offering?
The most recent registration is a S-3 filed 2026-03-19. A registration is capacity to sell shares — not a sale.
Does an offering always mean dilution?
Registered direct offerings and shelf takedowns issue new shares and dilute existing holders. Resale registrations (424B3/B7) let existing holders sell and do not create new shares. Secondary sales by insiders also do not dilute. Each row here is labeled with what it is.