RPID offering history
Every offering-related filing in RAPID MICRO BIOSYSTEMS, INC.’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 328 filings back to Oct 23, 2006.
| Date | Filing | What it means | |
|---|---|---|---|
| May 19, 2026 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| May 19, 2026 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Aug 12, 2025 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Dec 28, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Dec 26, 2023 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Dec 15, 2023 | S-3 → | REGISTERED | S-3 registration — capacity to sell shares, not a sale yet |
| Jul 16, 2021 | 424B4 → | EXECUTED | Final prospectus — offering priced (typical for IPOs and marketed share deals) |
| Jul 14, 2021 | S-1MEF → | REGISTERED | S-1MEF registration — capacity to sell shares, not a sale yet |
| Jul 14, 2021 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Jul 12, 2021 | S-1/A → | REGISTERED | S-1/A registration — capacity to sell shares, not a sale yet |
| Jun 25, 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.
RPID offering FAQ
When did RPID last execute an offering?
Per SEC filings, RAPID MICRO BIOSYSTEMS, INC.'s most recent priced offering document is a 424B5 filed 2026-05-19. Note a 424B takedown can price shares or notes (debt) — the linked document says which.
When did RPID last announce or register an offering?
The most recent registration is a S-3 filed 2023-12-15. 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.
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