SeaStar Medical Holding Corp
ICU- Exchange
- Nasdaq
- Industry
- Surgical & Medical Instruments & Apparatus
- SEC CIK
- 0001831868
In the last 90 days, SeaStar Medical Holding Corp insiders filed 1 open-market purchase and 0 sales; 18 institutions reported holding it in 13F filings for Q2 2026, worth $582.1K in total; no superinvestor holds it.
Other share classesICUCW
Key figures
- Insider buysLast 90 days, $2.45K in total
- 1
- Insider sellsOpen market, last 90 days
- 0
- 13F holdersQ2 2026, +2 vs. previous quarter
- 18
- 13F valueReported value at the end of Q2 2026
- $582.1K
- Superinvestors holdingAt the end of Q2 2026
- 0
Price chart
Superinvestors holding ICU, Q2 2026
No superinvestor reported holding ICU at the end of Q2 2026.
Latest insider trades
Open-market purchases and sales by SeaStar Medical Holding Corp insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Aug 19, 2026 (view filing)4:21 PM ET | Aug 18 | 1 day | Messinger MichaelChief Financial Officer | PPurchaseCommon Stock, par value $0.0001 | +750 | $3.27 | +$2.45K | +42.9%2.50K after | |
| Dec 22, 2025 (view filing)6:55 PM ET | Dec 19 | 3 days | Baird Jennifer ADirector | PPurchase | +4.20K | $0.2351 | +$987.42 | +13.1%36.2K after | |
| Dec 11, 2025 (view filing)6:49 PM ET | Dec 9 | 2 days | Messinger MichaelChief Financial Officer | PPurchase | +14.5K | $0.3516 | +$5.10K | +483.3%17.5K after | |
| Aug 28, 2025 (view filing) | Aug 26-27 | 2 days | Van Heel KennethDirector | PPurchaseCommon Stock, par value $0.0001 per share | +35.0K | $0.8814 | +$30.9K | +243.1%49.4K after | 2 lots |
| Aug 25, 2025 (view filing) | Aug 22 | 3 days | Chung KevinChief Medical Officer | PPurchaseCommon Stock, par value $0.0001 per share | +10.0K | $0.80 | +$8.00K | +20.8%58.2K after | |
| Jul 2, 2025 (view filing)7:32 PM ET | Jun 30 | 2 days | Baird Jennifer ADirector | PPurchaseCommon Stock, par value $0.0001 per share | +10.0K | $0.4174 | +$4.17K | +55.6%28.0K after | |
| Jun 27, 2025 (view filing)6:00 AM ET | Jun 24 | 3 daysLate | Neuman JohnDirector | PPurchaseCommon Stock, par value $0.0001 per share | +40.0K | $0.3599 | +$14.4K | +100.0%80.0K after | |
| May 22, 2025 (view filing) | May 20 | 2 days | Baird Jennifer ADirector | PPurchaseCommon Stock, par value $0.0001 per share | +10.0K | $1.28 | +$12.8K | New position10.0K after | |
| May 20, 2025 (view filing) | May 20 | Same day | Chung KevinChief Medical Officer | PPurchaseCommon Stock, par value $0.0001 per share | +4.50K | $1.25 | +$5.63K | +32.9%18.2K after | |
| Feb 27, 2025 (view filing) | Jun 14-Dec 11, 2024 | 258 daysLate | Neuman JohnDirector | PPurchaseCommon Stock, par value $0.0001 per share | +40.0K | $3.83 | +$153.2K | New position40.0K after | 4 lots |
Top 10 13F holders, Q2 2026
The largest institutional positions in SeaStar Medical Holding Corp at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Geode Capital Management, LLC | 49,593 | $182.0K | 0.00% | −6,049−10.9% | Reduced |
| Vanguard Capital Management LLC | 33,091 | $121.4K | 0.00% | +4,300+14.9% | Added |
| UBS Group AG | 31,398 | $115.2K | 0.00% | +30,605+3,859.4% | Added |
| Vanguard Fiduciary Trust Co | 13,692 | $50.3K | 0.00% | 00.0% | Unchanged |
| Jane Street Group, LLC | 12,634 | $46.4K | 0.00% | −15,326−54.8% | Reduced |
| Northern Trust Corp | 10,402 | $38.2K | 0.00% | +10,402 | New |
| The PNC Financial Services Group, Inc. | 4,943 | $18.1K | 0.00% | +3,195+182.8% | Added |
| Tower Research Capital LLC (TRC) | 1,356 | $4.98K | 0.00% | −39−2.8% | Reduced |
| BlackRock, Inc. | 913 | $3.35K | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 195 | $714 | 0.00% | −35−15.2% | Reduced |