WEXFORD CAPITAL LLC

10% owner at Bronco Drilling Company, Inc. · on record since Mar 31, 2006
Was 10% Owner at GULFPORT ENERGY CORP · on record since May 3, 2006
10% owner at ICX TECHNOLOGIES INC · on record since Nov 16, 2007
10% owner at NEPHROS INC · on record since Nov 16, 2007
10% owner at NORD RESOURCES CORP · on record since Oct 15, 2007
10% owner at REPUBLIC AIRWAYS HOLDINGS INC · on record since Nov 15, 2006
10% owner at AVIATION UPGRADE TECHNOLOGIES INC · on record since Nov 15, 2007
10% owner at SMI PRODUCTS INC · on record since Sep 19, 2007
10% owner prior to this filing at REPUBLIC AIRWAYS HOLDINGS INC · on record since Sep 6, 2007
10% owner prior to this filing at NORD RESOURCES CORP · on record since Jan 31, 2008
10% owner prior to this filing at JAVELIN PHARMACEUTICALS, INC · on record since May 15, 2008
No longer 10% filer. at Bronco Drilling Company, Inc. · on record since Aug 24, 2009
10% owner at ENERGY PARTNERS LTD · on record since Sep 23, 2009
10% owner at ADELPHIA COMMUNICATIONS CORP · on record since Jul 14, 2003
10% owner at GEOKINETICS INC · on record since Jul 16, 2003
Director at ICX TECHNOLOGIES INC · on record since Sep 10, 2009
10% owner at Rhino Resource Partners LP · on record since Sep 29, 2010
10% owner at SUNTERRA CORP · on record since Sep 9, 2003
10% owner at Empeiria Acquisition Corp · on record since Jun 20, 2011
No longer own 10% of Issuer at Revett Minerals Inc. · on record since Oct 17, 2013
Director at Rhino Resource Partners LP · on record since Mar 6, 2012
10% owner at GENERAL MARITIME CORP/ · on record since Nov 12, 2003
10% owner at RLJ Acquisition, Inc. · on record since May 3, 2012
10% owner at Diamondback Energy, Inc. · on record since Oct 15, 2012
10% owner at LAURIER INTERNATIONAL INC · on record since Jan 25, 2013
10% owner at RLJ ENTERTAINMENT, INC. · on record since Feb 25, 2013
No longer own 10% of Issuer at LAURIER INTERNATIONAL INC · on record since Oct 9, 2013
See Remarks at ENERGY PARTNERS LTD · on record since May 31, 2013
10% owner at Revett Minerals Inc. · on record since Apr 10, 2013
Director at MAMMOTH ENERGY SERVICES, INC. · on record since Oct 21, 2016
10% owner at MAMMOTH ENERGY SERVICES, INC. · on record since Oct 21, 2016
10% owner at SEABULK INTERNATIONAL INC · on record since Feb 4, 2004
Director at Diamondback Energy, Inc. · on record since Dec 19, 2014
10% owner at GULFPORT ENERGY CORP · on record since Sep 28, 2004
10% owner at FAMOUS DAVES OF AMERICA INC · on record since Jun 22, 2015
Director at FAMOUS DAVES OF AMERICA INC · on record since Apr 17, 2018
Chief Business Officer at MAMMOTH ENERGY SERVICES, INC. · on record since Jun 22, 2026
Director at NEPHROS INC · on record since Oct 16, 2020
10% owner at JAVELIN PHARMACEUTICALS, INC · on record since Nov 14, 2005

Insider trading activity of WEXFORD CAPITAL LLC

Transactions on record: 175; since Sep 9, 2003

Open-market buys: 10; $4.2M

Open-market sells: 107; $582.2M

Companies traded: 15; last filing Jun 22, 2026

Figures computed from official regulatory filings — methodology.

Companies where WEXFORD CAPITAL LLC has traded

MAMMOTH ENERGY SERVICES, INC.8 tx · $115.3M · Jun 22, 2026
NEPHROS INC5 tx · $10.6M · Jun 3, 2021
Rhino Resource Partners LP11 tx · Jan 5, 2016
Diamondback Energy, Inc.25 tx · $267.7M · Dec 10, 2015
RLJ ENTERTAINMENT, INC.3 tx · $24.9K · Dec 22, 2014
LAURIER INTERNATIONAL INC1 tx · $156 · Oct 9, 2013
ENERGY PARTNERS LTD8 tx · $21M · May 31, 2013
Empeiria Acquisition Corp4 tx · Jan 4, 2013
Bronco Drilling Company, Inc.29 tx · $101.4M · Jul 9, 2009

Track record of WEXFORD CAPITAL LLC

Statistical track record

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Open-market buys: 10

Last buy: Jun 17, 2026

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Transaction history of WEXFORD CAPITAL LLC

Co-insiders of WEXFORD CAPITAL LLC

This page republishes public regulatory disclosures. Concerned by this data? Exercise your right to object →

Company	Filed	Type	Qty	Price	Value · USD	Src
MAMMOTH ENERGY SERVICES, INC.	Jun 22, 2026	Other	1,072,896	0.00 USD	—	SEC
MAMMOTH ENERGY SERVICES, INC.	Jun 22, 2026	Buy	4,019,574	2.60 USD	—	SEC
MAMMOTH ENERGY SERVICES, INC.	Jun 22, 2026	Other	6,354,667	0.00 USD	—	SEC
MAMMOTH ENERGY SERVICES, INC.	Jun 21, 2022	Buy	10,382	2.17 USD	$22.5K	SEC
MAMMOTH ENERGY SERVICES, INC.	Jun 21, 2022	Buy	35,000	2.13 USD	$74.6K	SEC
NEPHROS INC	Jun 3, 2021	OtherD	-66,667	2.70 USD	$180K	SEC
NEPHROS INC	Jun 3, 2021	Other	66,667	2.70 USD	$180K	SEC
MAMMOTH ENERGY SERVICES, INC.	Nov 15, 2019	Buy	35,904	1.36 USD	$48.8K	SEC
MAMMOTH ENERGY SERVICES, INC.	Aug 1, 2018	Sell	-266,026	38.01 USD	$10.1M	SEC
MAMMOTH ENERGY SERVICES, INC.	Jul 3, 2018	Sell	-2,764,400	38.01 USD	$105.1M	SEC
Rhino Resource Partners LP	Jan 5, 2016	Other	-2,222,779	—	—	SEC
Rhino Resource Partners LP	Jan 5, 2016	OtherD	-9,719	0.00 USD	$0	SEC
Rhino Resource Partners LP	Jan 5, 2016	OtherD	-3,179,613	0.00 USD	$0	SEC
Rhino Resource Partners LP	Jan 5, 2016	Other	-6,793	—	—	SEC
Diamondback Energy, Inc.	Dec 10, 2015	Sell	-9,822	76.74 USD	$753.7K	SEC
Diamondback Energy, Inc.	Sep 22, 2015	Sell	-70,000	68.58 USD	$4.8M	SEC
Diamondback Energy, Inc.	Sep 17, 2015	Sell	-105,100	70.93 USD	$7.5M	SEC
Diamondback Energy, Inc.	Sep 17, 2015	Sell	-216,135	69.53 USD	$15M	SEC
Diamondback Energy, Inc.	Sep 17, 2015	Sell	-7,579	67.15 USD	$508.9K	SEC
Diamondback Energy, Inc.	Mar 24, 2015	Sell	-242,671	71.93 USD	$17.5M	SEC
Diamondback Energy, Inc.	Mar 9, 2015	Sell	-16,900	71.19 USD	$1.2M	SEC
Diamondback Energy, Inc.	Mar 9, 2015	Sell	-300,000	71.46 USD	$21.4M	SEC
Diamondback Energy, Inc.	Mar 4, 2015	Sell	-450,000	71.52 USD	$32.2M	SEC
Diamondback Energy, Inc.	Mar 4, 2015	Sell	-125,795	71.28 USD	$9M	SEC
Diamondback Energy, Inc.	Mar 4, 2015	Sell	-525,960	71.79 USD	$37.8M	SEC

Company	Filed	Type	Qty	Price	Value · USD	Src
MAMMOTH ENERGY SERVICES, INC.	Jun 22, 2026	Other	1,072,896	0.00 USD	—	SEC
MAMMOTH ENERGY SERVICES, INC.	Jun 22, 2026	Buy	4,019,574	2.60 USD	—	SEC
MAMMOTH ENERGY SERVICES, INC.	Jun 22, 2026	Other	6,354,667	0.00 USD	—	SEC
MAMMOTH ENERGY SERVICES, INC.	Jun 21, 2022	Buy	10,382	2.17 USD	$22.5K	SEC
MAMMOTH ENERGY SERVICES, INC.	Jun 21, 2022	Buy	35,000	2.13 USD	$74.6K	SEC
NEPHROS INC	Jun 3, 2021	OtherD	-66,667	2.70 USD	$180K	SEC
NEPHROS INC	Jun 3, 2021	Other	66,667	2.70 USD	$180K	SEC
MAMMOTH ENERGY SERVICES, INC.	Nov 15, 2019	Buy	35,904	1.36 USD	$48.8K	SEC
MAMMOTH ENERGY SERVICES, INC.	Aug 1, 2018	Sell	-266,026	38.01 USD	$10.1M	SEC
MAMMOTH ENERGY SERVICES, INC.	Jul 3, 2018	Sell	-2,764,400	38.01 USD	$105.1M	SEC
Rhino Resource Partners LP	Jan 5, 2016	Other	-2,222,779	—	—	SEC
Rhino Resource Partners LP	Jan 5, 2016	OtherD	-9,719	0.00 USD	$0	SEC
Rhino Resource Partners LP	Jan 5, 2016	OtherD	-3,179,613	0.00 USD	$0	SEC
Rhino Resource Partners LP	Jan 5, 2016	Other	-6,793	—	—	SEC
Diamondback Energy, Inc.	Dec 10, 2015	Sell	-9,822	76.74 USD	$753.7K	SEC
Diamondback Energy, Inc.	Sep 22, 2015	Sell	-70,000	68.58 USD	$4.8M	SEC
Diamondback Energy, Inc.	Sep 17, 2015	Sell	-105,100	70.93 USD	$7.5M	SEC
Diamondback Energy, Inc.	Sep 17, 2015	Sell	-216,135	69.53 USD	$15M	SEC
Diamondback Energy, Inc.	Sep 17, 2015	Sell	-7,579	67.15 USD	$508.9K	SEC
Diamondback Energy, Inc.	Mar 24, 2015	Sell	-242,671	71.93 USD	$17.5M	SEC
Diamondback Energy, Inc.	Mar 9, 2015	Sell	-16,900	71.19 USD	$1.2M	SEC
Diamondback Energy, Inc.	Mar 9, 2015	Sell	-300,000	71.46 USD	$21.4M	SEC
Diamondback Energy, Inc.	Mar 4, 2015	Sell	-450,000	71.52 USD	$32.2M	SEC
Diamondback Energy, Inc.	Mar 4, 2015	Sell	-125,795	71.28 USD	$9M	SEC
Diamondback Energy, Inc.	Mar 4, 2015	Sell	-525,960	71.79 USD	$37.8M	SEC