IMRX offering history
Every offering-related filing in Immuneering Corp’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 320 filings back to Oct 4, 2019.
| Date | Filing | What it means | |
|---|---|---|---|
| Sep 25, 2025 | FWP → | MARKETING | Free-writing prospectus — offering being marketed |
| Sep 25, 2025 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Sep 24, 2025 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Sep 24, 2025 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Sep 24, 2025 | FWP → | MARKETING | Free-writing prospectus — offering being marketed |
| Sep 8, 2025 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Sep 8, 2025 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Sep 3, 2025 | S-3 → | REGISTERED | S-3 registration — capacity to sell shares, not a sale yet |
| Aug 25, 2025 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Aug 20, 2025 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Aug 13, 2025 | S-3 → | REGISTERED | S-3 registration — capacity to sell shares, not a sale yet |
| Jun 23, 2025 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Mar 20, 2025 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Apr 19, 2023 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Apr 18, 2023 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Aug 19, 2022 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Aug 10, 2022 | S-3 → | REGISTERED | S-3 registration — capacity to sell shares, not a sale yet |
| Jul 30, 2021 | 424B4 → | EXECUTED | Final prospectus — offering priced (typical for IPOs and marketed share deals) |
| Jul 29, 2021 | S-1MEF → | REGISTERED | S-1MEF registration — capacity to sell shares, not a sale yet |
| Jul 29, 2021 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Jul 28, 2021 | S-1/A → | REGISTERED | S-1/A registration — capacity to sell shares, not a sale yet |
| Jul 26, 2021 | S-1/A → | REGISTERED | S-1/A registration — capacity to sell shares, not a sale yet |
| Jul 9, 2021 | S-1 → | REGISTERED | S-1 registration — capacity to sell shares, not a sale yet |
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.
IMRX offering FAQ
When did IMRX last execute an offering?
Per SEC filings, Immuneering Corp's most recent priced offering document is a 424B5 filed 2025-09-25. Note a 424B takedown can price shares or notes (debt) — the linked document says which.
When did IMRX last announce or register an offering?
The most recent registration is a S-3 filed 2025-09-03. 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.