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 ONCOVISTA INNOVATIVE THERAPIES, INC · on record since Nov 15, 2007
10% owner at CAPRICOR THERAPEUTICS, 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 EPL OIL & GAS, INC. · 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 · on record since Jun 20, 2011
No longer own 10% of Issuer at · on record since Oct 17, 2013
Director at · on record since Mar 6, 2012
10% owner at · on record since Nov 12, 2003
10% owner at · on record since May 3, 2012
10% owner at · on record since Oct 15, 2012
10% owner at · on record since Jan 25, 2013
10% owner at · on record since Feb 25, 2013
No longer own 10% of Issuer at · on record since Oct 9, 2013
See Remarks at · on record since May 31, 2013
10% owner at · on record since Apr 10, 2013
Director at · on record since Oct 21, 2016
10% owner at · on record since Oct 21, 2016
10% owner at · on record since Feb 4, 2004
Director at · on record since Dec 19, 2014
10% owner at · on record since Sep 28, 2004
10% owner at · on record since Jun 22, 2015
Director at · on record since Apr 17, 2018
Chief Business Officer at · on record since Jun 22, 2026
Director at · on record since Oct 16, 2020
10% owner at · on record since Nov 14, 2005

Insider trading activity of WEXFORD CAPITAL LLC

Transactions on record: 179; since Sep 9, 2003

Open-market buys: 10; $14.6M

Open-market sells: 107; $696.9M

Companies traded: 15; last filing Sep 16, 2026

Figures computed from official regulatory filings — .

Companies where WEXFORD CAPITAL LLC has traded

9 tx · $10.7M · Sep 16, 2026
8 tx · $125.8M · Jun 22, 2026
11 tx · Jan 5, 2016
25 tx · $267.7M · Dec 10, 2015
3 tx · $24.9K · Dec 22, 2014
1 tx · $156 · Oct 9, 2013
8 tx · $21M · May 31, 2013
4 tx · Jan 4, 2013
29 tx · $105.9M · Jul 9, 2009
1 tx · Dec 1, 2008
2 tx · $2.1M · May 15, 2008
42 tx · $83.5M · May 3, 2006
20 tx · $40.9M · Mar 30, 2004
3 tx · $12.1M · Feb 4, 2004

Track record of WEXFORD CAPITAL LLC

Statistical track record

Free account

Open-market buys: 10

Last buy: Jun 17, 2026

Win rates, median returns and the proven-insider analysis come with a free account.

Transaction history of WEXFORD CAPITAL LLC

Co-insiders of WEXFORD CAPITAL LLC

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
NEPHROS INCListing on record	Sep 16, 2026	Other	-3,355,111	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NEPHROS INCListing on record	Sep 16, 2026	Other	-22,710	3.95 USD	$89.7K		SEC
NEPHROS INCListing on record	Aug 20, 2026	ExerciseD (derivative)	-3,765	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NEPHROS INCListing on record	Aug 20, 2026	Exercise	812	3.60 USD	$2.9K		SEC
MAMMOTH ENERGY SERVICES, INC.Listing on record	Jun 22, 2026	Other	1,072,896	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MAMMOTH ENERGY SERVICES, INC.Listing on record	Jun 22, 2026	Buy	4,019,574	2.60 USD	$10.5M	conv 76Unusual sizeFirst in 12mo	SEC
MAMMOTH ENERGY SERVICES, INC.Listing on record	Jun 22, 2026	Other	6,354,667	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MAMMOTH ENERGY SERVICES, INC.Listing on record	Jun 21, 2022	Buy	10,382	2.17 USD	$22.5K	conv 28Cluster	SEC
MAMMOTH ENERGY SERVICES, INC.Listing on record	Jun 21, 2022	Buy	35,000	2.13 USD	$74.6K	conv 39ClusterFirst in 12mo	SEC
NEPHROS INCListing on record	Jun 3, 2021	OtherD (derivative)	-66,667	2.70 USD	$180K		SEC
NEPHROS INCListing on record	Jun 3, 2021	Other	66,667	2.70 USD	$180K		SEC
MAMMOTH ENERGY SERVICES, INC.Listing on record	Nov 15, 2019	Buy	35,904	1.36 USD	$48.8K	conv 41First in 12mo	SEC
MAMMOTH ENERGY SERVICES, INC.Listing on record	Aug 1, 2018	Sell	-266,026	38.01 USD	$10.1M		SEC
MAMMOTH ENERGY SERVICES, INC.Listing on record	Jul 3, 2018	Sell	-2,764,400	38.01 USD	$105.1M	Unusual size	SEC
Rhino Resource Partners LPListing unverified	Jan 5, 2016	Other	-2,222,779	—	n/a (No price was disclosed in the filing)		SEC
Rhino Resource Partners LPListing unverified	Jan 5, 2016	OtherD (derivative)	-9,719	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Rhino Resource Partners LPListing unverified	Jan 5, 2016	OtherD (derivative)	-3,179,613	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Rhino Resource Partners LPListing unverified	Jan 5, 2016	Other	-6,793	—	n/a (No price was disclosed in the filing)		SEC
Diamondback Energy, Inc.Listing on record	Dec 10, 2015	Sell	-9,822	76.74 USD	$753.7K		SEC
Diamondback Energy, Inc.Listing on record	Sep 22, 2015	Sell	-70,000	68.58 USD	$4.8M		SEC
Diamondback Energy, Inc.Listing on record	Sep 17, 2015	Sell	-105,100	70.93 USD	$7.5M		SEC
Diamondback Energy, Inc.Listing on record	Sep 17, 2015	Sell	-216,135	69.53 USD	$15M		SEC
Diamondback Energy, Inc.Listing on record	Sep 17, 2015	Sell	-7,579	67.15 USD	$508.9K		SEC
Diamondback Energy, Inc.Listing on record	Mar 24, 2015	Sell	-242,671	71.93 USD	$17.5M		SEC
Diamondback Energy, Inc.Listing on record	Mar 9, 2015	Sell	-16,900	71.19 USD	$1.2M		SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
NEPHROS INCListing on record	Sep 16, 2026	Other	-3,355,111	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NEPHROS INCListing on record	Sep 16, 2026	Other	-22,710	3.95 USD	$89.7K		SEC
NEPHROS INCListing on record	Aug 20, 2026	ExerciseD (derivative)	-3,765	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NEPHROS INCListing on record	Aug 20, 2026	Exercise	812	3.60 USD	$2.9K		SEC
MAMMOTH ENERGY SERVICES, INC.Listing on record	Jun 22, 2026	Other	1,072,896	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MAMMOTH ENERGY SERVICES, INC.Listing on record	Jun 22, 2026	Buy	4,019,574	2.60 USD	$10.5M	conv 76Unusual sizeFirst in 12mo	SEC
MAMMOTH ENERGY SERVICES, INC.Listing on record	Jun 22, 2026	Other	6,354,667	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MAMMOTH ENERGY SERVICES, INC.Listing on record	Jun 21, 2022	Buy	10,382	2.17 USD	$22.5K	conv 28Cluster	SEC
MAMMOTH ENERGY SERVICES, INC.Listing on record	Jun 21, 2022	Buy	35,000	2.13 USD	$74.6K	conv 39ClusterFirst in 12mo	SEC
NEPHROS INCListing on record	Jun 3, 2021	OtherD (derivative)	-66,667	2.70 USD	$180K		SEC
NEPHROS INCListing on record	Jun 3, 2021	Other	66,667	2.70 USD	$180K		SEC
MAMMOTH ENERGY SERVICES, INC.Listing on record	Nov 15, 2019	Buy	35,904	1.36 USD	$48.8K	conv 41First in 12mo	SEC
MAMMOTH ENERGY SERVICES, INC.Listing on record	Aug 1, 2018	Sell	-266,026	38.01 USD	$10.1M		SEC
MAMMOTH ENERGY SERVICES, INC.Listing on record	Jul 3, 2018	Sell	-2,764,400	38.01 USD	$105.1M	Unusual size	SEC
Rhino Resource Partners LPListing unverified	Jan 5, 2016	Other	-2,222,779	—	n/a (No price was disclosed in the filing)		SEC
Rhino Resource Partners LPListing unverified	Jan 5, 2016	OtherD (derivative)	-9,719	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Rhino Resource Partners LPListing unverified	Jan 5, 2016	OtherD (derivative)	-3,179,613	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Rhino Resource Partners LPListing unverified	Jan 5, 2016	Other	-6,793	—	n/a (No price was disclosed in the filing)		SEC
Diamondback Energy, Inc.Listing on record	Dec 10, 2015	Sell	-9,822	76.74 USD	$753.7K		SEC
Diamondback Energy, Inc.Listing on record	Sep 22, 2015	Sell	-70,000	68.58 USD	$4.8M		SEC
Diamondback Energy, Inc.Listing on record	Sep 17, 2015	Sell	-105,100	70.93 USD	$7.5M		SEC
Diamondback Energy, Inc.Listing on record	Sep 17, 2015	Sell	-216,135	69.53 USD	$15M		SEC
Diamondback Energy, Inc.Listing on record	Sep 17, 2015	Sell	-7,579	67.15 USD	$508.9K		SEC
Diamondback Energy, Inc.Listing on record	Mar 24, 2015	Sell	-242,671	71.93 USD	$17.5M		SEC
Diamondback Energy, Inc.Listing on record	Mar 9, 2015	Sell	-16,900	71.19 USD	$1.2M		SEC