Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in ICU held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | GEODE CAPITAL MANAGEMENT, LLC | 50K | $182K | -10.9% | 1.214% | 0.00% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 33K | $121K | +14.9% | 0.810% | 0.00% |
| 3 | UBS Group AG | 31K | $115K | +3859.4% | 0.769% | 0.00% |
| 4 | VANGUARD FIDUCIARY TRUST CO | 14K | $50K | 0.0% | 0.335% | 0.00% |
| 5 | JANE STREET GROUP, LLC | 13K | $46K | -54.8% | 0.309% | 0.00% |
| 6 | NORTHERN TRUST CORP | 10K | $38K | — | 0.255% | 0.00% |
| 7 | PNC FINANCIAL SERVICES GROUP, INC. | 5K | $18K | +182.8% | 0.121% | 0.00% |
| 8 | Tower Research Capital LLC (TRC) | 1K | $5K | -2.8% | 0.033% | 0.00% |
| 9 | BlackRock, Inc. | 913 | $3K | 0.0% | 0.022% | 0.00% |
| 10 | OSAIC HOLDINGS, INC. | 195 | $714 | -15.2% | 0.005% | 0.00% |
| 11 | NewEdge Advisors, LLC | 176 | $647 | 0.0% | 0.004% | 0.00% |
| 12 | Vanguard Global Advisers, LLC | 165 | $606 | 0.0% | 0.004% | 0.00% |
| 13 | TD Waterhouse Canada Inc. | 22 | $106 | 0.0% | 0.001% | 0.00% |
| 14 | SBI Securities Co., Ltd. | 14 | $51 | 0.0% | 0.000% | 0.00% |
| 15 | SOA Wealth Advisors, LLC. | 6 | $22 | 0.0% | 0.000% | 0.00% |
| 16 | BARCLAYS PLC | 4 | $15 | — | 0.000% | 0.00% |
| 17 | HighMark Wealth Management LLC | 2 | $7 | 0.0% | 0.000% | 0.00% |
| 18 | Caitong International Asset Management Co., Ltd | 2 | $7 | — | 0.000% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in ICU — a direct measure of their conviction.
Filings activity in ICU during Q2 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 18 | +5.9% | 3.88% | +0.66 pp | $1M | +19% |
| Q1 2026 | 17 | 19% | 3.22% | +1.27 pp | $0M | +156% |
| Q4 2025 | 21 | 25% | 1.95% | 0.73 pp | $0M | 69% |
| Q3 2025 | 28 | +3.7% | 2.68% | +1.58 pp | $1M | +226% |
| Q2 2025 | 27 | +0.0% | 1.10% | 1.11 pp | $0M | 87% |
| Q1 2025 | 27 | +29% | 2.21% | +1.80 pp | $1M | +359% |
| Q4 2024 | 21 | +31% | 0.41% | +0.10 pp | $0M | 39% |
| Q3 2024 | 16 | — | 0.31% | — | $1M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying ICU stock.
Based on Q2 2026 13F filings, institutional ownership of SeaStar Medical Holding Corporation stands at 3.9%, held across 18 reporting institutions.
GEODE CAPITAL MANAGEMENT, LLC is the largest reported institutional holder of ICU, with approximately 49,593 shares worth $0.00B as of Q2 2026.
Yes — 1 widely-followed marquee investor appear among the top 25 institutional holders of ICU, including JANE STREET GROUP, LLC.
Our composite Smart Money Score for ICU is 63 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
3 institutions opened new positions in ICU during Q2 2026, while 1 fully exited. 4 added to existing positions and 9 trimmed.
ICU institutional ownership rose by 0.66 percentage points quarter-over-quarter, with a net change of +1 holders.
The top 10 institutions account for 99.7% of all reported 13F value in ICU, and the top 25 account for 100.0%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
SeaStar Medical Holding Corporation (ICU) Institutional Ownership