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OMEX

Odyssey Marine Exploration Inc

Company with tickers: OMEX

CIK
798528
CUSIP
676118201
Shares Outstanding
58,574,115
13F Activity (30d)
48 filings 48 filers
Holders: 60
Total Value: $18,189,114
Total Shares: 21,809,527

Institutional Ownership Trend

25 quarters

Holder Concentration

Across 60 13F filers · Δ vs Dec 31, 2025
Top Holder
25.6%
Jun 2023 → Mar 2026 · range 25.6% – 51.3%
−0.7 pts
Top 5
73.7%
Jun 2023 → Mar 2026 · range 59.4% – 74.3%
+1.6 pts
Top 10
87.6%
Jun 2023 → Mar 2026 · range 77.8% – 89.7%
+3.4 pts
HHI
1,428
Jun 2023 → Mar 2026 · range 1,197 – 2,828
Broadly held −89

Quarterly Activity

vs Dec 31, 2025
New
18
Increased
11
Decreased
12
Sold Out
16
Unchanged
19
Holder count: +2
Institutional value: -55.5%
Shares held: +4.5%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mega CITADEL ADVISORS LLC +1,431,909 1,809,782
Mid Two Seas Capital LP +407,956 5,592,985
Mega JANE STREET GROUP, LLC +132,806 448,461
Mid XTX Topco Ltd +121,677 221,812
Large RENAISSANCE TECHNOLOGIES LLC +53,122 541,721

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP −939,019 1,048,577
Small Old West Investment Management, LLC −723,252 4,773,196
Mid GROUP ONE TRADING LLC −330,900 126,819
Mid SIMPLEX TRADING, LLC −157,817 20,737
Mid Foundations Investment Advisors, LLC −107,500 183,750

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 2,396,641 $1,998,798
Mega VANGUARD FIDUCIARY TRUST CO 266,559 $222,310
Large Rockefeller Capital Management L.P. 123,749 $103,206
Mid BBR PARTNERS, LLC 60,616 $50,553
Small Pilgrim Partners Asia Pte Ltd 36,600 $30,524

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega VANGUARD GROUP INC 868,585 $1,702,425
Small Rangeley Capital, LLC 608,749 $1,193,148
Mid MANGROVE PARTNERS IM, LLC 197,952 $387,985
Large Qube Research & Technologies Ltd 77,812 $152,511
Mid NewEdge Advisors, LLC 62,066 $121,649
Filter: New 18 Increased 11 Reduced 12 Sold out 16 Unchanged 19
Showing 67 of 67
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Mid Two Seas Capital LP $4,664,549 25.64% 5,592,985
Small Old West Investment Management, LLC $3,980,845 21.89% 4,773,196
Mega VANGUARD CAPITAL MANAGEMENT LLC $1,998,798 10.99% 2,396,641
Mega CITADEL ADVISORS LLC $1,291,934 7.10% 1,549,082
Large Jefferies Financial Group Inc. $1,251,000 6.88% 1,500,000
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $691,033 3.80% 828,577
Mega GEODE CAPITAL MANAGEMENT, LLC $504,871 2.78% 605,362
Large RENAISSANCE TECHNOLOGIES LLC $451,795 2.48% 541,721
Mega BlackRock, Inc. $326,874 1.80% 391,938
Mega UBS Group AG $303,350 1.67% 363,730
Mega JANE STREET GROUP, LLC $298,788 1.64% 358,261
Mega VANGUARD FIDUCIARY TRUST CO Bank $222,310 1.22% 266,559
Mega STATE STREET CORP $191,663 1.05% 229,812
Mid XTX Topco Ltd $184,991 1.02% 221,812
Mid Foundations Investment Advisors, LLC Endowment $153,247 0.84% 183,750
Small SLT Holdings LLC $153,247 0.84% 183,750
Mega CITADEL ADVISORS LLC $135,358 0.74% 162,300
Small L. Roy Papp & Associates, LLP $127,152 0.70% 152,461
Mid GROUP ONE TRADING LLC $105,767 0.58% 126,819
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $105,667 0.58% 126,700
Large Rockefeller Capital Management L.P. $103,206 0.57% 123,749
Mega NORTHERN TRUST CORP Bank $97,945 0.54% 117,441
Micro VOISARD ASSET MANAGEMENT GROUP, INC. $90,072 0.50% 108,000
Mega CITADEL ADVISORS LLC $82,065 0.45% 98,400
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $77,812 0.43% 93,300
Mega TWO SIGMA INVESTMENTS, LP $77,245 0.42% 92,620
Mid Caprock Group, LLC $71,006 0.39% 85,140
Mega JANE STREET GROUP, LLC $61,548 0.34% 73,800
Mid BBR PARTNERS, LLC $50,553 0.28% 60,616
Small Pilgrim Partners Asia Pte Ltd $30,524 0.17% 36,600
Mega GOLDMAN SACHS GROUP INC $25,412 0.14% 30,471
Mega Vanguard Global Advisers, LLC $22,412 0.12% 26,873
Small TWO SIGMA SECURITIES, LLC Broker-Dealer $21,522 0.12% 25,806
Large Schonfeld Strategic Advisors LLC $20,016 0.11% 24,000
Mid Apollon Wealth Management, LLC $18,886 0.10% 22,646
Mid SIMPLEX TRADING, LLC $17,294 0.10% 20,737
Mid Valeo Financial Advisors, LLC $16,680 0.09% 20,000
Small Catalyst Funds Management Pty Ltd $16,429 0.09% 19,700
Small Scientech Research LLC $16,111 0.09% 19,318
Mid CARY STREET PARTNERS FINANCIAL LLC $15,846 0.09% 19,000
Mid Concurrent Investment Advisors, LLC $14,178 0.08% 17,000
Mid Baader Bank Aktiengesellschaft Bank $13,816 0.08% 16,566
Mega JANE STREET GROUP, LLC $13,677 0.08% 16,400
Large COMMONWEALTH EQUITY SERVICES, LLC $12,942 0.07% 15,518
Mega JPMORGAN CHASE & CO $12,712 0.07% 15,243
Mid Graham Capital Management, L.P. $12,286 0.07% 14,732
Micro 5th Street Advisors, LLC $11,359 0.06% 13,621
Small GenTrust, LLC $8,655 0.05% 10,378
Mid Tower Research Capital LLC (TRC) $3,213 0.02% 3,853
Mid MAI Capital Management $2,564 0.01% 3,075
Mid Valeo Financial Advisors, LLC $2,525 0.01% 3,028
Mega MORGAN STANLEY $911 0.01% 1,093
Small Parkside Financial Bank & Trust Bank $842 0.00% 1,010
Mid Farther Finance Advisors, LLC $834 0.00% 1,000
Micro Avion Wealth $729 0.00% 875
Large OSAIC HOLDINGS, INC. $559 0.00% 671
Mega BNP PARIBAS ARBITRAGE, SA $452 0.00% 543
Small Truvestments Capital LLC $417 0.00% 500
Mid SBI Securities Co., Ltd. Broker-Dealer $306 0.00% 367
Mid Allworth Financial LP $243 0.00% 292
Micro True Wealth Design, LLC $35 0.00% 42
Large US BANCORP \DE\ Bank $14 0.00% 17
Mid HARBOUR INVESTMENTS, INC. $8 0.00% 10
Small Silicon Valley Capital Partners $7 0.00% 9
Small FINANCIAL CONSULATE, INC $7 0.00% 9
Mega WELLS FARGO & COMPANY/MN $0 0.00% 1
Small Caitong International Asset Management Co., Ltd $0 0.00% 1

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