SeaStar Medical Holding Corporation
SeaStar Medical Holding Corporation (ICU) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ICU · as of Sep 30, 2025
Ownership Breakdown
26
Institutional Holders
▲ 1 vs Q2
$624,252
Total Inst. Value
▲ $419,515 vs Q2
2.84M
Shares Outstanding
freeFloat 99.32%
1.09M
13F Shares Held
▲ 612,005 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
ICU largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC surgical & medical instruments & apparatus | 377.4K | 18.20% | 18.20% | $215.10M | Nov 7, 2025 | ▲ 319.9K |
GEODE CAPITAL MANAGEMENT, LLC surgical & medical instruments & apparatus | 258.9K | 12.49% | 12.49% | $147.59M | Nov 12, 2025 | ▲ 190.1K |
MILLENNIUM MANAGEMENT LLC surgical & medical instruments & apparatus | 179.7K | 8.67% | 8.67% | $102.41M | Nov 14, 2025 | NEW |
TRINITY FINANCIAL ADVISORS LLC surgical & medical instruments & apparatus | 50.0K | 2.41% | 2.41% | $28.50M | Oct 7, 2025 | ▲ 35.0K |
XTX TOPCO LTD surgical & medical instruments & apparatus | 48.6K | 2.34% | 2.34% | $27.68M | Nov 14, 2025 | ▼ 12.4K |
DYNAMIC ADVISOR SOLUTIONS LLC surgical & medical instruments & apparatus | 29.3K | 1.41% | 1.41% | $16.69M | Oct 9, 2025 | NEW |
TORONTO DOMINION BANK surgical & medical instruments & apparatus | 25.0K | 1.21% | 1.21% | $14.25M | Nov 14, 2025 | NEW |
GOLDMAN SACHS GROUP INC surgical & medical instruments & apparatus | 19.0K | 0.92% | 0.92% | $10.82M | Nov 14, 2025 | ▲ 6.6K |
RAYMOND JAMES FINANCIAL INC surgical & medical instruments & apparatus | 17.7K | 0.85% | 0.85% | $10.10M | Nov 14, 2025 | ▼ 19.5K |
TYCHE WEALTH PARTNERS LLC surgical & medical instruments & apparatus | 17.7K | 0.85% | 0.85% | $10.09M | Nov 4, 2025 | ▼ 20.0K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
8
Increased
+555.2K shares3
New Positions
first time holders6
Decreased
−138.4K shares2
Sold Out
fully exitedNet shares change (top 50)
+416.8K
+555.2K / −138.4K
Net new holders
+3
3 new / 2 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ICU insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
1
Buy transactions
0
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Van Heel Kenneth director | Feb 6, 2026 | Award | 3,000 | — | — | 7.9K | Form 4 ↗ |
Neuman John director | Feb 6, 2026 | Award | 3,000 | — | — | 12.2K | Form 4 ↗ |
Vincent Bernadette N director | Feb 6, 2026 | Award | 3,000 | — | — | 4.2K | Form 4 ↗ |
Baird Jennifer A director | Feb 6, 2026 | Award | 3,000 | — | — | 6.6K | Form 4 ↗ |
Towne Bradford K Principal Accounting Officer | Feb 6, 2026 | Award | 7,500 | — | — | 9.1K | Form 4 ↗ |
Chung Kevin Chief Medical Officer | Feb 6, 2026 | Award | 15,000 | — | — | 20.8K | Form 4 ↗ |
Schlorff Eric Chief Executive Officer | Feb 6, 2026 | Award | 30,000 | — | — | 39.9K | Form 4 ↗ |
Baird Jennifer A director | Dec 19, 2025 | Purchase | 4,200 | $0.24 | $987.42 | 36.2K | Form 4 ↗ |
Messinger Michael Chief Financial Officer | Dec 9, 2025 | Purchase | 14,500 | $0.35 | $5.1K | 17.5K | Form 4 ↗ |
Van Heel Kenneth director | Aug 27, 2025 | Purchase | 10,000 | $0.86 | $8.6K | 49.4K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
SeaStar Medical Holding Corporation (ICU) is primarily owned by institutional investors, who hold approximately 38.5% of total shares outstanding. Company insiders own approximately 0.68%, while retail and public investors account for the remaining 60.78%.
The largest institutional shareholder of SeaStar Medical Holding Corporation is VANGUARD GROUP INC, holding approximately 377,377 shares — equal to 18.20% of outstanding shares — as of September 30, 2025.
A total of 26 institutional investors currently hold ICU stock, with a combined institutional value of approximately $624,252 as of the most recent 13F filing period.
Frequently asked questions
ICU ownershipSeaStar Medical Holding Corporation (ICU) is primarily owned by institutional investors, who hold approximately 38.5% of shares. The largest shareholder is VANGUARD GROUP INC with a 18.20% stake. Company insiders hold 0.68%. Data sourced from SEC Form 13F as of September 30, 2025.