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Offerings // Cartesian Therapeutics, Inc.

RNAC offering history

Every offering-related filing in Cartesian Therapeutics, Inc.’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 873 filings back to Jan 5, 2009.

Last executed offering
May 26, 2026
8-K — priced deal (shares or notes)
Last registration (announced)
Dec 13, 2024
S-3 — capacity, not a sale
Executed, last 12 months
1
424B pricings + 8-K 3.02 sales
Registered, last 12 months
0
S-1/S-3/F-series registrations
DateFilingWhat it means
May 26, 20268-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Jan 13, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jan 13, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jan 8, 2025424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Jan 8, 2025424B7 →UPDATEResale prospectus — existing holders registering to sell
Jan 8, 2025424B7 →UPDATEResale prospectus — existing holders registering to sell
Jan 8, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jan 8, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jan 8, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Dec 13, 2024S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Dec 13, 2024S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Dec 13, 2024S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Oct 1, 2024424B7 →UPDATEResale prospectus — existing holders registering to sell
Oct 1, 2024EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Sep 20, 2024S-1/A →REGISTEREDS-1/A registration — capacity to sell shares, not a sale yet
Sep 9, 2024S-1/A →REGISTEREDS-1/A registration — capacity to sell shares, not a sale yet
Aug 2, 2024S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
Jul 2, 20248-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Dec 1, 2023S-3/A →REGISTEREDS-3/A registration — capacity to sell shares, not a sale yet
Dec 1, 2023EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Nov 13, 20238-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Oct 25, 2023S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Apr 7, 2022424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Oct 25, 2021424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Sep 3, 20208-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Aug 14, 2020EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Aug 6, 2020S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Jun 12, 20208-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Feb 6, 2020EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jan 29, 2020S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Dec 26, 20198-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Aug 20, 20198-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Jan 24, 2019424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jan 22, 2019424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Aug 28, 2017EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Aug 11, 2017S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Jul 21, 2017EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jul 13, 2017S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Jun 28, 20178-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Jun 9, 20178-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
RNAC offering-related filings from SEC EDGAR, newest first (capped at 40). Each links to the original document.

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.

Is a shelf active now? →Do they need money? →Red flags →Full RNAC workspace →
RNAC offering FAQ

When did RNAC last execute an offering?

Per SEC filings, Cartesian Therapeutics, Inc.'s most recent priced offering document is a 8-K filed 2026-05-26. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did RNAC last announce or register an offering?

The most recent registration is a S-3 filed 2024-12-13. 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.