Odyssey Marine Exploration, Inc. (OMEX) Ownership
OMEX ownership summary
as of October 18, 2026- Institutions
- 47.3% of shares outstanding
- Insiders
- 10.37% of shares outstanding
- Shares outstanding
- 58.7M
- Float
- 41.4M shares available to trade
- Short interest
- 8.18% 4.2M shares short
- Days to cover
- 16.61 short interest down 9.9% vs prior month
- Institutions 47.33%
- Insiders 10.37%
- Other investors 42.30%
OMEX top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Two Seas Capital LP | 9.53% | 5.6M | $3.6M | +407,956 (+7.9%) | March 31, 2026 |
| 2 | Old West Investment Management, LLC | 7.67% | 4.5M | $2.9M | −270,522 (−5.7%) | June 30, 2026 |
| 3 | Vanguard Capital Management, LLC | 4.08% | 2.4M | $1.5M | −2,096 (−0.1%) | June 30, 2026 |
| 4 | Jefferies Financial Group Inc | 2.56% | 1.5M | $960,000 | — | June 30, 2026 |
| 5 | Morgan Stanley - Brokerage Accounts | 2.36% | 1.4M | $884,749 | +1.4M (+126,379.4%) | June 30, 2026 |
| 6 | UBS Group AG | 2.05% | 1.2M | $768,932 | +837,727 (+230.3%) | June 30, 2026 |
| 7 | Susquehanna International Group, LLP | 1.14% | 666K | $426,493 | −162,181 (−19.6%) | June 30, 2026 |
| 8 | Geode Capital Management, LLC | 1.03% | 603K | $385,774 | −2,590 (−0.4%) | June 30, 2026 |
| 9 | BlackRock Inc | 0.78% | 459K | $293,625 | +66,851 (+17.1%) | June 30, 2026 |
| 10 | Vanguard Fiduciary Trust Co | 0.51% | 300K | $191,715 | +32,996 (+12.4%) | June 30, 2026 |
| 11 | State Street Corp | 0.39% | 230K | $147,080 | — | June 30, 2026 |
| 12 | XTX Topco Ltd | 0.29% | 172K | $109,980 | −49,968 (−22.5%) | June 30, 2026 |
| 13 | Papp L Roy & Associates | 0.26% | 152K | $97,575 | — | June 30, 2026 |
| 14 | Group One Trading, LLC | 0.25% | 148K | $95,000 | +21,619 (+17.0%) | June 30, 2026 |
| 15 | Northern Trust Corp | 0.21% | 123K | $79,003 | +6,001 (+5.1%) | June 30, 2026 |
| 16 | Rockefeller Capital Management L.P. | 0.20% | 117K | $74,719 | −7,000 (−5.7%) | June 30, 2026 |
| 17 | Caprock Group Inc | 0.18% | 105K | $67,290 | +20,000 (+23.5%) | June 30, 2026 |
| 18 | BlackDiamond Wealth Management Inc. | 0.17% | 100K | $64,000 | +100,000 (0.0%) | June 30, 2026 |
| 19 | VOISARD ASSET MANAGEMENT GROUP INC | 0.16% | 95K | $60,800 | −13,000 (−12.0%) | September 30, 2026 |
| 20 | Two Sigma Investments LLC | 0.14% | 79K | $50,870 | −13,135 (−14.2%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 9 holders added 2.9M shares and 8 cut 520K.
OMEX top mutual fund and ETF holders
12 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 0.12% | 1.8M | $1.1M | — | August 31, 2026 |
| 2 | MS INVF Global Endurance Z USD Acc | 0.06% | 885K | $566,453 | +885,083 (0.0%) | June 30, 2026 |
| 3 | Morgan Stanley Global Endurance R6 | 0.03% | 480K | $307,029 | +479,733 (0.0%) | June 30, 2026 |
| 4 | Fidelity Extended Market Index | 0.02% | 283K | $181,037 | −1,520 (−0.5%) | August 31, 2026 |
| 5 | Abante Quant Value FI | 0.02% | 258K | $165,107 | +257,980 (0.0%) | August 31, 2026 |
| 6 | iShares Micro-Cap ETF | 0.01% | 173K | $110,612 | −1,192 (−0.7%) | September 30, 2026 |
| 7 | Fidelity Total Market Index | 0.01% | 94K | $60,301 | — | August 31, 2026 |
| 8 | Fidelity Series Total Market Index | 0.01% | 78K | $49,713 | — | August 31, 2026 |
| 9 | Vanguard Balanced Index Inv | <0.01% | 35K | $22,580 | — | August 31, 2026 |
| 10 | Vanguard U.S. Eq Idx £ Acc | <0.01% | 27K | $17,199 | — | August 31, 2026 |
| 11 | 1290 VT Micro Cap K | <0.01% | 12K | $7,775 | — | August 31, 2026 |
| 12 | BlackRock Global Equity Mkt Netrl Instl | 0.00% | 543 | $348 | — | July 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
OMEX insider transactions
latest 5| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2025-10-14 | John D Longley Jr | Sell | $3.72 | 217,072 | $807,508 |
| 2025-10-13 | John D Longley Jr | Sell | $3.50 | 38,977 | $136,420 |
| 2025-07-22 | Gallardo Juan Antonio Cortina | Sell | $1.70 | 409,100 | $695,470 |
| 2025-07-18 | Gallardo Juan Antonio Cortina | Sell | $1.72 | 473,591 | $814,577 |
| 2025-07-17 | Gallardo Juan Antonio Cortina | Sell | $1.70 | 96,409 | $163,895 |
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.
OMEX shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns OMEX
Institutional investors own 47.3% of Odyssey Marine Exploration's shares and insiders 10.37%. The largest holder is Two Seas Capital LP with 9.53% of the shares (5.6M), as of March 31, 2026. Among the top 20 institutions, 9 added shares and 8 reduced their stake in the latest filings. Short interest is 8.18% of the float, or 16.61 days of average trading volume. The share count rose 439.0% since 2014.
Related: OMEX key metrics. See the OMEX stock overview for the latest quote and news.
OMEX ownership FAQ
Who owns the most Odyssey Marine Exploration stock?
The largest shareholders of Odyssey Marine Exploration are Two Seas Capital LP (9.53%), Old West Investment Management, LLC (7.67%), Vanguard Capital Management, LLC (4.08%), Jefferies Financial Group Inc (2.56%), Morgan Stanley - Brokerage Accounts (2.36%).
What percentage of Odyssey Marine Exploration is owned by institutions?
Institutions hold 47.3% of Odyssey Marine Exploration's shares outstanding; insiders hold 10.37%.
Which funds own Odyssey Marine Exploration?
The largest fund holders of Odyssey Marine Exploration are Vanguard MStar Total Stk Mkt Idx Invest (0.12%), MS INVF Global Endurance Z USD Acc (0.06%), Morgan Stanley Global Endurance R6 (0.03%), Fidelity Extended Market Index (0.02%), Abante Quant Value FI (0.02%).
What is Odyssey Marine Exploration's short interest?
4.2M shares of Odyssey Marine Exploration were sold short, 8.18% of the float; at the average daily volume it would take 16.61 days to cover.
Are insiders buying or selling Odyssey Marine Exploration?
Of the latest 5 reported insider transactions in Odyssey Marine Exploration (since July 17, 2025), 0 were purchases and 5 were sales.
How many shares of Odyssey Marine Exploration are outstanding?
Odyssey Marine Exploration has 58.7M shares outstanding, of which 41.4M are in the public float.