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Offerings // SeaStar Medical Holding Corp

ICU offering history

Every offering-related filing in SeaStar Medical Holding Corp’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 543 filings back to Dec 1, 2020.

Last executed offering
Oct 5, 2026
8-K — priced deal (shares or notes)
Last registration (announced)
Oct 30, 2026
S-3 — capacity, not a sale
Executed, last 12 months
2
424B pricings + 8-K 3.02 sales
Registered, last 12 months
3
S-1/S-3/F-series registrations
DateFilingWhat it means
Oct 30, 2026S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Oct 5, 20268-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
May 13, 2026424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
May 11, 2026EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
May 7, 2026S-1/A →REGISTEREDS-1/A registration — capacity to sell shares, not a sale yet
May 5, 2026EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
May 5, 2026EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
May 5, 2026EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Apr 28, 2026S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
Nov 20, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Oct 14, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Aug 12, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Aug 8, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Aug 8, 2025S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
Aug 1, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Aug 1, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Jul 14, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Jul 11, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jul 10, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jun 23, 2025424B4 →EXECUTEDFinal prospectus — offering priced (typical for IPOs and marketed share deals)
Jun 20, 2025S-1/A →REGISTEREDS-1/A registration — capacity to sell shares, not a sale yet
Jun 20, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jun 16, 2025S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
May 29, 2025424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
May 27, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
May 19, 2025S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
Apr 29, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Apr 25, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Apr 22, 2025S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Apr 2, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Feb 3, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Feb 3, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Aug 27, 2024EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Aug 27, 2024EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Aug 21, 2024424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Aug 16, 2024S-3/A →REGISTEREDS-3/A registration — capacity to sell shares, not a sale yet
Aug 16, 2024S-3/A →REGISTEREDS-3/A registration — capacity to sell shares, not a sale yet
Aug 2, 2024S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Jul 11, 2024424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jul 11, 20248-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
ICU 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 ICU workspace →
ICU offering FAQ

When did ICU last execute an offering?

Per SEC filings, SeaStar Medical Holding Corp's most recent priced offering document is a 8-K filed 2026-10-05. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did ICU last announce or register an offering?

The most recent registration is a S-3 filed 2026-10-30. 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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