Latest Period
Q1 2026
Security Snapshot
SeaStar Medical Holding Corporation - Common stock, par value $0.0001 per share (ICU) Institutional Ownership
CUSIP: 81256L203
13F Institutional Holders and Ownership History from Q2 2024 to Q1 2026
Institutions Reporting
0
Shares (Excl. Options)
0
Price
$0.24
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- Security type / class
- Equity / Common stock, par value $0.0001 per share
- Symbol
- ICU on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 0
- Total 13F value
- $0
- Share change
- -420,159
- Value change
- -$100,436
- Number of holders
- 0
- Shares outstanding
- 4,436,967
- SEC-reported price per share
- $0.24
- Insider filing price
- $0.24
Latest holder snapshot
4 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- ICU - SeaStar Medical Holding Corporation - Common stock, par value $0.0001 per share is tracked under CUSIP 81256L203.
- 0 institutions reported positions in Q1 2026.
- 3 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 18 to 0 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $191,006 to $0.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 0 institutions filings for Q1 2026.
Security key
81256L203
Latest holder period
Q1 2026
13F holders
0
13D/G owners
3
CIK / CUSIP context first
Open Q1 2026 holders
ICU full holder history
SeaStar Medical Holding Corp SEC filings
SeaStar Medical Holding Corp company facts
SeaStar Medical Holding Corp insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 81256L203:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
3
Security
ICU
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| ARMISTICE CAPITAL, LLC | 5% | -50% | $864,997 | +$263,221 | 1,466,096 | +44% | Armistice Capital, LLC | 30 Jun 2025 |
| INTRACOASTAL CAPITAL, LLC | 10% | 0% | $106,381 | -$848,979 | 443,253 | -89% | Mitchell P. Kopin | 31 Mar 2026 |
| Ayrton Capital LLC | 6.5% | +131% | $66,825 | -$3,822 | 278,436 | -5.4% | Ayrton Capital LLC | 31 Mar 2026 |
As of 31 Mar 2026, 0 institutional investors reported holding 0 shares of SeaStar Medical Holding Corporation - Common stock, par value $0.0001 per share (ICU). This represents 0% of the company’s total 4,436,967 outstanding shares.
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
8
Latest
Q1 2026
Rows shown
1-8 of 8
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 0 | $0 | -$100,436 | $0.24 | 0 |
| 2025 Q4 | 797,536 | $191,006 | -$239,885 | $0.24 | 18 |
| 2025 Q3 | 1,093,735 | $624,252 | +$354,548 | $0.57 | 26 |
| 2025 Q2 | 481,730 | $204,737 | -$936,285 | $0.43 | 25 |
| 2025 Q1 | 902,474 | $1,495,736 | +$1,191,145 | $1.66 | 25 |
| 2024 Q4 | 181,242 | $351,256 | +$59,877 | $1.94 | 19 |
| 2024 Q3 | 136,569 | $584,327 | -$174,893 | $4.26 | 15 |
| 2024 Q2 | 150,877 | $1,145,286 | +$1,145,286 | $7.59 | 16 |