SEACOR Marine Holdings Inc. (SMHI) Ownership
SMHI ownership summary
as of October 18, 2026- Institutions
- 47.2% of shares outstanding
- Insiders
- 21.01% of shares outstanding
- Shares outstanding
- 27.1M
- Float
- 21.4M shares available to trade
- Short interest
- 3.87% 896K shares short
- Days to cover
- 9.62 short interest up 7.1% vs prior month
- Institutions 47.19%
- Insiders 21.01%
- Other investors 31.80%
SMHI top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Arnhold & S. Bleichroeder Advisers, LLC | 7.62% | 2.1M | $17.0M | +997,489 (+93.2%) | June 30, 2026 |
| 2 | BlackRock Inc | 5.87% | 1.6M | $13.1M | +53,691 (+3.5%) | June 30, 2026 |
| 3 | Oppenheimer & Close Inc | 5.10% | 1.4M | $11.4M | +2,425 (+0.2%) | June 30, 2026 |
| 4 | Dimensional Fund Advisors, Inc. | 4.37% | 1.2M | $9.7M | −65,865 (−5.3%) | June 30, 2026 |
| 5 | Vanguard Capital Management, LLC | 3.48% | 943K | $7.7M | −74,396 (−7.3%) | June 30, 2026 |
| 6 | Robotti Robert | 2.63% | 713K | $5.9M | −54,727 (−7.1%) | June 30, 2026 |
| 7 | Flat Footed LLC | 2.52% | 684K | $5.6M | +683,777 (0.0%) | June 30, 2026 |
| 8 | Geode Capital Management, LLC | 1.96% | 531K | $4.4M | +26,942 (+5.3%) | June 30, 2026 |
| 9 | State Street Corp | 1.83% | 497K | $4.1M | −1,720 (−0.3%) | June 30, 2026 |
| 10 | HPM Partners LLC | 1.59% | 432K | $3.5M | −3,209 (−0.7%) | June 30, 2026 |
| 11 | First Manhattan Co. LLC | 1.14% | 309K | $2.5M | −11,500 (−3.6%) | June 30, 2026 |
| 12 | Morgan Stanley - Brokerage Accounts | 0.91% | 248K | $2.0M | −4,258 (−1.7%) | June 30, 2026 |
| 13 | Oppenheimer & Co Inc | 0.84% | 227K | $1.9M | +4,400 (+2.0%) | June 30, 2026 |
| 14 | Glenorchy Capital Ltd | 0.81% | 219K | $1.8M | +8,334 (+4.0%) | June 30, 2026 |
| 15 | Semper Augustus Investments Group LLC | 0.77% | 208K | $1.7M | — | June 30, 2026 |
| 16 | Northern Trust Corp | 0.63% | 171K | $1.4M | −24,040 (−12.3%) | June 30, 2026 |
| 17 | Vanguard Portfolio Management, LLC | 0.55% | 149K | $1.2M | +22,272 (+17.6%) | June 30, 2026 |
| 18 | Vanguard Fiduciary Trust Co | 0.50% | 136K | $1.1M | +1,767 (+1.3%) | June 30, 2026 |
| 19 | HighTower Advisors, LLC | 0.48% | 129K | $1.1M | +213 (+0.2%) | June 30, 2026 |
| 20 | Renaissance Technologies Corp | 0.42% | 114K | $937,582 | −6,200 (−5.1%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 10 holders added 1.8M shares and 9 cut 246K.
SMHI top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | First Eagle Small Cap Opportunity I | 3.35% | 909K | $7.5M | — | September 30, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 2.53% | 687K | $5.6M | — | August 31, 2026 |
| 3 | iShares Russell 2000 ETF | 2.02% | 549K | $4.5M | −6,336 (−1.1%) | September 30, 2026 |
| 4 | DFA US Small Cap Value I | 1.02% | 276K | $2.3M | +2,730 (+1.0%) | August 31, 2026 |
| 5 | Fidelity Small Cap Index | 0.88% | 240K | $2.0M | +1,117 (+0.5%) | July 31, 2026 |
| 6 | iShares Russell 2000 Value ETF | 0.71% | 192K | $1.6M | +292 (+0.2%) | September 30, 2026 |
| 7 | DFA US Targeted Value I | 0.58% | 158K | $1.3M | +1,448 (+0.9%) | August 31, 2026 |
| 8 | Pinnacle Value | 0.52% | 140K | $1.1M | — | June 30, 2026 |
| 9 | Vanguard Russell 2000 ETF | 0.48% | 129K | $1.1M | +1,331 (+1.0%) | September 30, 2026 |
| 10 | Dimensional US Small Cap Value ETF | 0.39% | 106K | $867,222 | — | September 24, 2026 |
| 11 | DFA US Small Cap I | 0.39% | 105K | $858,602 | — | August 31, 2026 |
| 12 | Fidelity Extended Market Index | 0.38% | 103K | $845,531 | −553 (−0.5%) | August 31, 2026 |
| 13 | BSF Systematic US Eq Abs Ret A2 USD | 0.34% | 92K | $757,652 | −2,898 (−3.0%) | December 31, 2025 |
| 14 | DFA US Micro Cap I | 0.33% | 90K | $738,728 | — | August 31, 2026 |
| 15 | Dimensional US Targeted Value ETF | 0.31% | 85K | $701,249 | +58 (+0.1%) | September 30, 2026 |
| 16 | First Eagle US Small Cap Opp I-UC | 0.30% | 81K | $668,409 | — | September 30, 2026 |
| 17 | Dimensional US Small Cap ETF | 0.29% | 79K | $648,894 | — | September 30, 2026 |
| 18 | iShares Micro-Cap ETF | 0.26% | 70K | $574,355 | −482 (−0.7%) | September 30, 2026 |
| 19 | iShares Core S&P Total US Stock Mkt ETF | 0.21% | 58K | $478,019 | +50 (+0.1%) | September 30, 2026 |
| 20 | Schwab Small Cap Index | 0.20% | 53K | $435,516 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
SMHI insider transactions
latest 1| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2025-11-11 | Julie Persily | Sell | $7.45 | 7,000 | $52,150 |
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.
SMHI shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns SMHI
Institutional investors own 47.2% of SEACOR Marine's shares and insiders 21.01%. The largest holder is Arnhold & S. Bleichroeder Advisers, LLC with 7.62% of the shares (2.1M), as of June 30, 2026. Among the top 20 institutions, 10 added shares and 9 reduced their stake in the latest filings. Short interest is 3.87% of the float, or 9.62 days of average trading volume. The share count rose 48.4% since 2015.
Related: SMHI analyst forecast, SMHI key metrics. See the SMHI stock overview for the latest quote and news.
SMHI ownership FAQ
Who owns the most SEACOR Marine stock?
The largest shareholders of SEACOR Marine are Arnhold & S. Bleichroeder Advisers, LLC (7.62%), BlackRock Inc (5.87%), Oppenheimer & Close Inc (5.10%), Dimensional Fund Advisors, Inc. (4.37%), Vanguard Capital Management, LLC (3.48%).
What percentage of SEACOR Marine is owned by institutions?
Institutions hold 47.2% of SEACOR Marine's shares outstanding; insiders hold 21.01%.
Which funds own SEACOR Marine?
The largest fund holders of SEACOR Marine are First Eagle Small Cap Opportunity I (3.35%), Vanguard MStar Total Stk Mkt Idx Invest (2.53%), iShares Russell 2000 ETF (2.02%), DFA US Small Cap Value I (1.02%), Fidelity Small Cap Index (0.88%).
What is SEACOR Marine's short interest?
896K shares of SEACOR Marine were sold short, 3.87% of the float; at the average daily volume it would take 9.62 days to cover.
Are insiders buying or selling SEACOR Marine?
Of the latest 1 reported insider transactions in SEACOR Marine (since November 11, 2025), 0 were purchases and 1 were sales.
How many shares of SEACOR Marine are outstanding?
SEACOR Marine has 27.1M shares outstanding, of which 21.4M are in the public float.