ALNY offering history
Every offering-related filing in ALNYLAM PHARMACEUTICALS, INC.’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 1,000 filings back to Aug 15, 2014.
| Date | Filing | What it means | |
|---|---|---|---|
| Sep 12, 2025 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Sep 16, 2022 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Jun 5, 2020 | S-3ASR → | REGISTERED | Automatic shelf registration — effective immediately (large filers) |
| Apr 13, 2020 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Apr 9, 2019 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Jan 15, 2019 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Jan 14, 2019 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Nov 14, 2017 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Nov 13, 2017 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| May 25, 2017 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| May 25, 2017 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| May 23, 2017 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| May 5, 2017 | S-3ASR → | REGISTERED | Automatic shelf registration — effective immediately (large filers) |
| Jan 26, 2015 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Jan 21, 2015 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Jan 20, 2015 | 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.
ALNY offering FAQ
When did ALNY last execute an offering?
Per SEC filings, ALNYLAM PHARMACEUTICALS, INC.'s most recent priced offering document is a 8-K filed 2025-09-12. Note a 424B takedown can price shares or notes (debt) — the linked document says which.
When did ALNY last announce or register an offering?
The most recent registration is a S-3ASR filed 2020-06-05. 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.