ICU
SeaStar Medical Holding CorpCompany with tickers: ICU, ICUCW
CIK
1831868
CUSIP
81256L302
Shares Outstanding
3,997,002
13F Activity (30d)
14 filings
14 filers
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Holders: 17
Total Value: $489,431
Total Shares: 131,570
Institutional Ownership Trend
Holder Concentration
Across 17 13F filers · Δ vs Dec 31, 2025Top Holder
42.3%
−30.6 pts
Top 5
97.2%
−2.8 pts
Top 10
99.8%
−0.2 pts
HHI
2,831
Highly concentrated
−3,217
Quarterly Activity
vs Dec 31, 2025
New
15
Increased
0
Decreased
2
Sold Out
0
Unchanged
0
Holder count:
+15
Institutional value:
+100399.2%
Shares held:
+64712.8%
Top Buyers
vs Dec 31, 2025No qualifying movers this quarter.
Top Sellers
vs Dec 31, 2025| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Mid SBI Securities Co., Ltd. | −134 | 14 | |
| Small SOA Wealth Advisors, LLC. | −49 | 6 |
Top New Positions
vs Dec 31, 2025| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Mega GEODE CAPITAL MANAGEMENT, LLC | 55,642 | $206,987 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC | 28,791 | $107,102 | |
| Mega JANE STREET GROUP, LLC | 27,960 | $104,011 | |
| Mega VANGUARD FIDUCIARY TRUST CO | 13,692 | $50,934 | |
| Mega PNC FINANCIAL SERVICES GROUP, INC. | 1,748 | $6,502 |
Top Sold-Out Positions
vs Dec 31, 2025No fully closed positions this quarter.
| Holder | Value (USD) | % of 13F | Shares | Type | Discretion | Filed | Open | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Mega GEODE CAPITAL MANAGEMENT, LLC | $206,987 | 42.29% | 55,642 | Shares | Defined | 2026-05-15 | ||||
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $107,102 | 21.88% | 28,791 | Shares | Defined | 2026-05-15 | ||||
| Mega JANE STREET GROUP, LLC | $104,011 | 21.25% | 27,960 | Shares | Defined | 2026-05-12 | ||||
| Mega VANGUARD FIDUCIARY TRUST CO Bank | $50,934 | 10.41% | 13,692 | Shares | Defined | 2026-05-08 | ||||
| Mega PNC FINANCIAL SERVICES GROUP, INC. | $6,502 | 1.33% | 1,748 | Shares | Defined | 2026-05-08 | ||||
| Mid Tower Research Capital LLC (TRC) | $5,189 | 1.06% | 1,395 | Shares | Defined | 2026-05-15 | ||||
| Mega BlackRock, Inc. | $3,396 | 0.69% | 913 | Shares | Sole | 2026-05-13 | ||||
| Mega UBS Group AG | $2,949 | 0.60% | 793 | Shares | Defined | 2026-05-05 | ||||
| Large OSAIC HOLDINGS, INC. | $855 | 0.17% | 230 | Shares | Defined | 2026-05-15 | ||||
| Large NewEdge Advisors, LLC | $654 | 0.13% | 176 | Shares | Sole | 2026-06-03 | ||||
| Mega Vanguard Global Advisers, LLC | $613 | 0.13% | 165 | Shares | Defined | 2026-05-08 | ||||
| Large TD Waterhouse Canada Inc. | $81 | 0.02% | 22 | Shares | Defined | 2026-05-12 | ||||
| Mega MORGAN STANLEY | $74 | 0.02% | 20 | Shares | Defined | 2026-05-15 | ||||
| Mid SBI Securities Co., Ltd. Broker-Dealer | $52 | 0.01% | 14 | Shares | Defined | 2026-04-28 | ||||
| Small SOA Wealth Advisors, LLC. | $22 | 0.00% | 6 | Shares | Sole | 2026-05-20 | ||||
| Micro HighMark Wealth Management LLC | $7 | 0.00% | 2 | Shares | Sole | 2026-05-06 | ||||
| Large CWM, LLC | $3 | 0.00% | 1 | Shares | Sole | 2026-05-14 | ||||
| No holders match your search. | ||||||||||