As of November 6, 2026, SeaStar Medical Holding Corp is a publicly traded company (Nasdaq: ICU); its largest reported holder is Mitchell P. Kopin, with 9.99% on Schedule 13G/A of May 13, 2026, then Ayrton Capital LLC (6.52%). The largest insider holding is Eric Schlorff, the chief executive, with 50,140 shares (1.1% of shares outstanding), per Form 4 of July 2, 2026 (Schedule 13G/A, May 13, 2026).
Is this your company?
About to sign with, pay or invest in SeaStar Medical Holding Corp? See the free Snapshot first.
Free to see. No signup.
Is SeaStar Medical Holding Corp a real, registered company?
- SeaStar Medical Holding Corporation files with the SEC under CIK 1831868 (its SEC filings).
- Its shares are listed under the ticker ICU on Nasdaq (also ICUCW) (SEC company record).
- Incorporated in Delaware; business address in Denver, Colorado, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under SeaStar Medical Holding Corp in our court records and SEC 8-K records (as of 2026-11-06).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Mitchell P. Kopin (filed 2026-05-13).
Who are SeaStar Medical Holding Corp's owners and officers?
SeaStar Medical Holding Corp: incorporated in Delaware; business address in Denver, Colorado; industry Surgical & Medical Instruments & Apparatus (Form D, 2026-10-08).
Officers and directors, each with the role and the filing that names them:
- : Executive Officer, Director (Form D, 2026-10-08)
- : Executive Officer (Form D, 2026-10-08)
- : Executive Officer (Form D, 2026-10-08)
- : Director (Form D, 2026-10-08)
- : Director (Form D, 2026-10-08)
- : Director (Form D, 2026-10-08)
- : Director (Form D, 2026-10-08)
- : Executive Officer (Form D, 2026-10-08)
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-05-13 | Mitchell P. Kopin | 9.99% |
| Schedule 13G, 2026-05-11 | Ayrton Capital LLC | 6.52% |
| Schedule 13G/A, 2026-02-13 | Mitchell P. Kopin | 9.99% |
| Schedule 13G/A, 2025-11-07 | Mitchell P. Kopin | 9.99% |
| Schedule 13G/A, 2025-08-14 | Armistice Capital, LLC | 4.99% |
| Schedule 13G/A, 2025-08-13 | Ayrton Capital LLC | 2.6% |
Questions about who owns SeaStar Medical Holding Corp
Who owns SeaStar Medical Holding Corp?
On this page, 2 holders' latest ownership filings report 5% or more of SeaStar Medical Holding Corp: Mitchell P. Kopin (9.99%, Schedule 13G/A, filed 2026-05-13) and Ayrton Capital LLC (6.52%, Schedule 13G, filed 2026-05-11).
Who are the largest shareholders of SeaStar Medical Holding Corp?
By the share each holder's latest filing reports, the largest holders of SeaStar Medical Holding Corp on this page are Mitchell P. Kopin (9.99%) and Ayrton Capital LLC (6.52%).
When did Mitchell P. Kopin buy into SeaStar Medical Holding Corp?
The filings give report dates, not purchase dates. The earliest filing from Mitchell P. Kopin on this page is the Schedule 13G/A, filed 2025-11-07, reporting 9.99%; its latest, Schedule 13G/A filed 2026-05-13, reports 9.99%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 6 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
Want the whole picture on SeaStar Medical Holding Corp?
Example from a real report (our sample on Target): “The Q2 2026 earnings report, published August 19, 2026, showed adjusted EPS of $2.46 against an expected $2.33” Source: CNBC
A Full Report on SeaStar Medical Holding Corp: verified, sourced, every claim cited, ready in a few minutes. See pricing.
What the Full Report on SeaStar Medical Holding Corp covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
19 cited sources found
Plus the sections for what you are deciding, which you pick after ordering.
A real finished report, first screen. Opens in a new tab.
Which insiders own SeaStar Medical Holding Corp shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , the chief executive: 50,140 shares (1.1% of shares outstanding) (Form 4, 2026-07-02).
- , the chief medical officer: 28,021 shares (0.64% of shares outstanding) (Form 4, 2026-07-02).
- , a director: 16,200 shares (0.37% of shares outstanding) (Form 4, 2026-07-02).
- , a director: 11,940 shares (0.27% of shares outstanding) (Form 4, 2026-07-02).
- , a director: 10,620 shares (0.24% of shares outstanding) (Form 4, 2026-07-02).
Shares outstanding: 4,406,841 as of 2026-08-05, from the company's latest SEC cover page.
How much has SeaStar Medical Holding Corp raised?
| Filed | Sold | Offered |
|---|---|---|
| Form D, 2026-10-08 | $3.30M | $3.30M |
| Form D, 2024-07-26 | $10M | $10M |
Latest IPO step: SeaStar Medical Holding Corp amended its IPO registration (S-1/A, 2026-05-07).
IPO filings: S-1/A, 2026-05-07, S-1, 2026-04-28, S-1, 2025-08-08, 424B4, 2025-06-23, S-1/A, 2025-06-20.
Keep reading
More on SeaStar Medical Holding Corp and the records around it.
SeaStar Medical Holding Corp elsewhere on the record
- Company profile and every filing Oct 2026
- Form D filing Oct 2026
- 5%+ stake filings May 2026
Companies that share a holder
- Ayrton Capital LLC also filed stake reports on 31 other companies: Bluejay Diagnostics, Inc. (Aug 2026), BTC Digital Ltd. (Aug 2026), DEFSEC Technologies Inc. (Aug 2026)
- Mitchell P. Kopin also filed stake reports on 55 other companies: SCWorx Corp. (Sep 2026), NFT Limited (Aug 2026), Silexion Therapeutics Corp (Aug 2026)
- Armistice Capital, LLC also filed stake reports on 120 other companies: Autolus Therapeutics plc (Aug 2026), Bicycle Therapeutics plc (Aug 2026), BioXcel Therapeutics, Inc. (Aug 2026)
Related pages
Funding and filing history5%+ holders
Filings, cases and notices link to their records. A not-found line names the records searched; it is not proof of absence.
Not for employment, credit, insurance or tenancy decisions.
Cite this page
https://mentionfox.com/who-owns/seastar-medical-holding-corp