SeaStar Medical Holding Corporation (ICU) Ownership
ICU ownership summary
as of October 17, 2026- Institutions
- 7.6% of shares outstanding
- Insiders
- 11.62% of shares outstanding
- Shares outstanding
- 5.3M
- Float
- 4.4M shares available to trade
- Short interest
- 3.28% 144K shares short
- Days to cover
- 3.20 short interest up 18.1% vs prior month
- Institutions 7.62%
- Insiders 11.62%
- Other investors 80.76%
ICU top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Geode Capital Management, LLC | 1.29% | 50K | $143,820 | −6,049 (−10.9%) | June 30, 2026 |
| 2 | Vanguard Capital Management, LLC | 0.86% | 33K | $95,964 | +4,300 (+14.9%) | June 30, 2026 |
| 3 | UBS Group AG | 0.82% | 31K | $91,054 | +30,605 (+3,859.4%) | June 30, 2026 |
| 4 | Vanguard Fiduciary Trust Co | 0.36% | 14K | $39,707 | — | June 30, 2026 |
| 5 | Jane Street Group LLC | 0.33% | 13K | $36,639 | −15,326 (−54.8%) | June 30, 2026 |
| 6 | Northern Trust Corp | 0.27% | 10K | $30,166 | +10,402 (0.0%) | June 30, 2026 |
| 7 | PNC Financial Services Group Inc | 0.13% | 4,943 | $14,335 | +3,195 (+182.8%) | June 30, 2026 |
| 8 | Tower Research Capital LLC | 0.04% | 1,356 | $3,932 | −39 (−2.8%) | June 30, 2026 |
| 9 | BlackRock Inc | 0.02% | 913 | $2,648 | — | June 30, 2026 |
| 10 | Advisor Group Holdings, Inc. | 0.01% | 195 | $566 | −35 (−15.2%) | June 30, 2026 |
| 11 | Goss Wealth Management LLC | <0.01% | 176 | $510 | — | June 30, 2026 |
| 12 | Vanguard Global Advisers, LLC | <0.01% | 165 | $478 | — | June 30, 2026 |
| 13 | TD Waterhouse Canada Inc | <0.01% | 22 | $64 | — | June 30, 2026 |
| 14 | SBI Securities Co Ltd | <0.01% | 14 | $41 | — | June 30, 2026 |
| 15 | SOA Wealth Advisors, LLC. | <0.01% | 6 | $17 | — | June 30, 2026 |
| 16 | Barclays PLC | <0.01% | 4 | $12 | +4 (0.0%) | June 30, 2026 |
| 17 | Caitong International Asset Management Co., Limited. | <0.01% | 2 | $6 | +2 (0.0%) | June 30, 2026 |
| 18 | Mercer Global Advisors Inc. | 0.00% | 1 | $3 | +1 (0.0%) | June 30, 2026 |
| 19 | CWM, LLC duplicate | 0.00% | 1 | $3 | +1 (0.0%) | March 31, 2026 |
| 20 | Tyche Wealth Partners LLC | 0.00% | — | — | −1,770 (−100.0%) | March 31, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 8 holders added 49K shares and 5 cut 23K.
ICU top mutual fund and ETF holders
8 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Fidelity Extended Market Index | 0.53% | 21K | $59,641 | −111 (−0.5%) | August 31, 2026 |
| 2 | Abante Quant Value FI | 0.30% | 11K | $32,944 | — | August 31, 2026 |
| 3 | Fidelity Total Market Index | 0.23% | 8,656 | $25,102 | — | August 31, 2026 |
| 4 | Fidelity Nasdaq Composite Index | 0.19% | 7,164 | $20,776 | — | August 31, 2026 |
| 5 | Fidelity Series Total Market Index | 0.15% | 5,814 | $16,861 | — | August 31, 2026 |
| 6 | Dimensional US Core Equity 2 ETF | 0.07% | 2,835 | $8,222 | — | September 30, 2026 |
| 7 | DFA US Vector Equity Class F | 0.07% | 2,800 | $8,120 | +2,800 (0.0%) | July 31, 2026 |
| 8 | Vanguard U.S. Eq Idx £ Acc | <0.01% | 165 | $478 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
ICU insider transactions
latest 9| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2025-12-19 | Jennifer A Baird | Buy | $2.40 | 420 | $1,008 |
| 2025-12-09 | Michael Messinger | Buy | $3.50 | 1,450 | $5,075 |
| 2025-08-27 | Heel Kenneth Van | Buy | $8.60 | 1,000 | $8,600 |
| 2025-08-26 | Heel Kenneth Van | Buy | $8.90 | 2,500 | $22,250 |
| 2025-08-22 | Kevin Chung | Buy | $8.00 | 1,000 | $8,000 |
| 2025-06-30 | Jennifer A Baird | Buy | $4.20 | 1,000 | $4,200 |
| 2025-06-24 | John Neuman | Buy | $3.60 | 4,000 | $14,400 |
| 2025-05-20 | Jennifer A Baird | Buy | $12.80 | 1,000 | $12,800 |
| 2025-05-20 | Kevin Chung | Buy | $12.50 | 450 | $5,625 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
ICU shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns ICU
Institutional investors own 7.6% of SeaStar Medical's shares and insiders 11.62%. The largest holder is Geode Capital Management, LLC with 1.29% of the shares (50K), as of June 30, 2026. Among the top 20 institutions, 8 added shares and 5 reduced their stake in the latest filings. Short interest is 3.28% of the float, or 3.20 days of average trading volume. The share count rose 39,614.4% since 2020.
Related: ICU analyst forecast, ICU key metrics. See the ICU stock overview for the latest quote and news.
ICU ownership FAQ
Who owns the most SeaStar Medical stock?
The largest shareholders of SeaStar Medical are Geode Capital Management, LLC (1.29%), Vanguard Capital Management, LLC (0.86%), UBS Group AG (0.82%), Vanguard Fiduciary Trust Co (0.36%), Jane Street Group LLC (0.33%).
What percentage of SeaStar Medical is owned by institutions?
Institutions hold 7.6% of SeaStar Medical's shares outstanding; insiders hold 11.62%.
Which funds own SeaStar Medical?
The largest fund holders of SeaStar Medical are Fidelity Extended Market Index (0.53%), Abante Quant Value FI (0.30%), Fidelity Total Market Index (0.23%), Fidelity Nasdaq Composite Index (0.19%), Fidelity Series Total Market Index (0.15%).
What is SeaStar Medical's short interest?
144K shares of SeaStar Medical were sold short, 3.28% of the float; at the average daily volume it would take 3.20 days to cover.
Are insiders buying or selling SeaStar Medical?
Of the latest 9 reported insider transactions in SeaStar Medical (since May 20, 2025), 9 were purchases and 0 were sales.
How many shares of SeaStar Medical are outstanding?
SeaStar Medical has 5.3M shares outstanding, of which 4.4M are in the public float.