Odyssey Marine Exploration, Inc.
Odyssey Marine Exploration, Inc. (OMEX) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · OMEX · as of Sep 30, 2025
Ownership Breakdown
60
Institutional Holders
▲ 9 vs Q2
$27.77M
Total Inst. Value
▲ $22.99M vs Q2
31.14M
Shares Outstanding
freeFloat 79.53%
14.24M
13F Shares Held
▲ 10.19M 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
OMEX largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
TWO SEAS CAPITAL LP water transportation | 4.57M | 14.86% | 14.86% | $8.91B | Nov 14, 2025 | ▲ 3.14M |
OLD WEST INVESTMENT MANAGEMENT, LLC water transportation | 3.68M | 11.96% | 11.96% | $7.17B | Nov 5, 2025 | NEW |
GROUP ONE TRADING, L.P. water transportation | 702.8K | 2.29% | 2.29% | $1.37B | Nov 12, 2025 | ▲ 625.4K |
SUSQUEHANNA INTERNATIONAL GROUP, LLP water transportation | 671.1K | 2.18% | 2.18% | $1.31B | Nov 14, 2025 | ▲ 4.2K |
VANGUARD GROUP INC water transportation | 640.4K | 2.08% | 2.08% | $1.25B | Nov 7, 2025 | ▲ 179.1K |
PEAK6 LLC water transportation | 600.0K | 1.95% | 1.95% | $1.17B | Mar 31, 2026 | NEW |
SUSQUEHANNA INTERNATIONAL GROUP, LLP water transportation | 522.6K | 1.70% | 1.70% | $1.02B | Nov 14, 2025 | ▲ 413.0K |
RANGELEY CAPITAL, LLC water transportation | 479.5K | 1.56% | 1.56% | $934.98M | Nov 14, 2025 | NEW |
GEODE CAPITAL MANAGEMENT, LLC water transportation | 407.9K | 1.33% | 1.33% | $795.70M | Nov 12, 2025 | ▲ 102.5K |
JEFFERIES FINANCIAL GROUP INC. water transportation | 400.0K | 1.30% | 1.30% | $780.00M | Nov 13, 2025 | NEW |
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
20
Increased
+5.06M shares14
New Positions
first time holders6
Decreased
−291.8K shares0
Sold Out
fully exitedNet shares change (top 50)
+4.77M
+5.06M / −291.8K
Net new holders
+28
14 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
OMEX insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
2
Buy transactions
11
Sell transactions
0.18
Buy/Sell ratio
$1M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Gordon Mark Chief Executive Officer | Oct 16, 2025 | Sale | 30,000 | $3.87 | $116.0K | 542.2K | Form 4 ↗ |
Gordon Mark Chief Executive Officer | Oct 17, 2025 | Sale | 30,000 | $3.50 | $105.0K | 512.2K | Form 4 ↗ |
Gordon Mark Chief Executive Officer | Oct 20, 2025 | Sale | 30,000 | $3.56 | $106.9K | 482.2K | Form 4 ↗ |
Longley John D Jr President & COO | Oct 13, 2025 | Sale | 38,977 | $3.50 | $136.4K | 223.9K | Form 4 ↗ |
Longley John D Jr President & COO | Oct 14, 2025 | Sale | 73,572 | $3.75 | $275.6K | 150.3K | Form 4 ↗ |
Longley John D Jr President & COO | Oct 14, 2025 | Sale | 143,500 | $3.71 | $532.9K | 150.3K | Form 4 ↗ |
Gordon Mark Chief Executive Officer | Oct 13, 2025 | Sale | 20,956 | $3.50 | $73.3K | 632.2K | Form 4 ↗ |
Gordon Mark Chief Executive Officer | Oct 14, 2025 | Sale | 30,000 | $3.74 | $112.1K | 602.2K | Form 4 ↗ |
Gordon Mark Chief Executive Officer | Oct 15, 2025 | Sale | 30,000 | $3.98 | $119.4K | 572.2K | Form 4 ↗ |
Cortina Gallardo Juan Antonio Carlos 10 percent owner | Jul 31, 2025 | X-InTheMoney | 1,939,468 | $1.10 | $2.13M | 3.93M | 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
Odyssey Marine Exploration, Inc. (OMEX) is primarily owned by institutional investors, who hold approximately 45.7% of total shares outstanding. Company insiders own approximately 20.47%, while retail and public investors account for the remaining 33.80%.
The largest institutional shareholder of Odyssey Marine Exploration, Inc. is TWO SEAS CAPITAL LP, holding approximately 4.57 million shares — equal to 14.86% of outstanding shares — as of September 30, 2025.
A total of 60 institutional investors currently hold OMEX stock, with a combined institutional value of approximately $27,766,468 as of the most recent 13F filing period.
Frequently asked questions
OMEX ownershipOdyssey Marine Exploration, Inc. (OMEX) is primarily owned by institutional investors, who hold approximately 45.7% of shares. The largest shareholder is TWO SEAS CAPITAL LP with a 14.86% stake. Company insiders hold 20.47%. Data sourced from SEC Form 13F as of September 30, 2025.