SeaStar Medical Holding Corporation (ICU)
Nasdaq: ICU · Surgical & Medical Instruments & Apparatus · Denver, CO · filing with the SEC since 2020
Who owns SeaStar Medical Holding Corporation
As filed with the SECHolders of 5% or more
2
Mitchell P. Kopin holds 9.99% of Common stock, par value $0.0001 per share, as its SCHEDULE 13G/A filed May 13, 2026 says.
Directors and officers
8
report now, of 18 people on the record since 2021. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 2 named at left.
Holders of 5% or moreshare of the class, as filed
Mitchell P. Kopin
SCHEDULE 13G/A · filed May 13, 2026 · Common stock, par value $0.0001 per share · 9.99% in Feb 13, 2026
Ayrton Capital LLC
SCHEDULE 13G · filed May 11, 2026 · Common stock, par value $0.0001 per share · 2.6% in Aug 13, 2025
Armistice Capital, LLC
SCHEDULE 13G/A · filed Aug 14, 2025 · Common Stock, $0.0001 par value · reported falling below 5%, from 9.99% in May 15, 2025
What ICU reports owning in othersstakes of 5% or more, and other ties
SeaStar Medical Holding Corporation reports no stake in another company in the record.
Insider tradesForm 4
0sales
3purchases
0sales on a scheduled plan
0people selling
$0sold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Sep 30, 2025 to Sep 30, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Sep 30, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window2 of 22 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Messinger Michael | Chief Financial Officer | 0 | $0 | 0 | 2 | $0 |
| Baird Jennifer A | director | 0 | $0 | 0 | 1 | $0 |