Odyssey Marine Exploration Inc (Nasdaq: OMEX), an SEC filer in Water Transportation, closed at $0.82, -8.6%, on 2026-08-28, with a market cap of $53M as of 2026-08-27, a net margin of -12180.6% and 3-year sales growth of 24.4%. Institutional ownership, earnings history and filed financials are on the tabs below.
| # | Holder | Shares | Value | % of shares out | Δ QoQ |
|---|---|---|---|---|---|
| 1 | Two Seas Capital LP | 5,592,9855.6M | $5M | 9.61% | ADD 8% |
| 2 | Old West Investment Management, LLC | 4,773,1964.8M | $4M | 8.20% | TRIM -13% |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 2,396,6412.4M | $2M | 4.12% | NEW† |
| 4 | CITADEL ADVISORS LLC | 1,549,0821.5M | $1M | 2.66% | ADD 9191% |
| 5 | Jefferies Financial Group Inc. | 1,500,0001.5M | $1M | 2.58% | — |
| 6 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 828,577828,577 | $691,033 | 1.42% | TRIM -29% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 605,362605,362 | $505,091 | 1.04% | ADD 8% |
| 8 | RENAISSANCE TECHNOLOGIES LLC | 541,721541,721 | $451,795 | 0.93% | ADD 11% |
| 9 | BlackRock, Inc. | 391,938391,938 | $326,877 | 0.67% | TRIM -6% |
| 10 | UBS Group AG | 363,730363,730 | $303,351 | 0.62% | ADD 12% |
† NEW this big is usually a rename.
Ranked by each filer’s own reported value, not shares.
1 holder — The filer reported no value for this line, so it carries no dollar figure and is left out of the percentage and value columns.
| Biggest buyers | Δ shares | Δ value | |
|---|---|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC | +2,396,641 | $2M | OPEN |
| CITADEL ADVISORS LLC | +1,532,409 | $1M | ADD |
| Two Seas Capital LP | +407,956 | $340,235 | ADD |
| VANGUARD FIDUCIARY TRUST CO | +266,559 | $222,310 | OPEN |
| Rockefeller Capital Management L.P. | +123,749 | $103,207 | OPEN |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| VANGUARD GROUP INC | −868,585 | $724,400 | CLOSE |
| Old West Investment Management, LLC | −723,252 | $603,192 | TRIM |
| Rangeley Capital, LLC | −608,749 | $507,697 | CLOSE |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | −340,719 | $284,160 | TRIM |
| GROUP ONE TRADING LLC | −330,900 | $275,971 | TRIM |
Prior quarter split-rebased · 13Fs are long, US-listed only.
| Holder | 2024-Q4 | 2025-Q1 | 2025-Q2 | 2025-Q3 | 2025-Q4 | 2026-Q1 | Latest value |
|---|---|---|---|---|---|---|---|
| Two Seas Capital LP | 2.5M | 2.5M | 1.4M | 4.6M | 5.2M | 5.6M | $5M |
| Old West Investment Management, LLC | — | — | — | 3.7M | 5.5M | 4.8M | $4M |
| VANGUARD CAPITAL MANAGEMENT LLC | — | — | — | — | — | 2.4M | $2M |
| CITADEL ADVISORS LLC | — | — | — | 157K | 17K | 1.5M | $1M |
| Jefferies Financial Group Inc. | — | — | — | 400K | 1.5M | 1.5M | $1M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 209K | — | 667K | 671K | 1.2M | 829K | $691,033 |
| GEODE CAPITAL MANAGEMENT, LLC | 211K | 304K | 305K | 408K | 560K | 605K | $505,091 |
| RENAISSANCE TECHNOLOGIES LLC | — | — | — | 32K | 489K | 542K | $451,795 |
| BlackRock, Inc. | 228K | 228K | 251K | 331K | 415K | 392K | $326,877 |
| UBS Group AG | 127K | 163K | 2K | 68K | 326K | 364K | $303,351 |
Green = added, red = trimmed, grey = held; a dash is a quarter with no 13F on file — a gap, not an exit.
Breaks = no 13F that quarter.
Short interest has its own tab now — open SI →
SEC Form 13F · ~10,250 filers, 10y · long-only, US-listed, filed ≤45d after quarter-end.
