DAVIDSON CHARLES E

10% owner at Bronco Drilling Company, Inc. · on record since Mar 31, 2006
10% owner at REPUBLIC AIRWAYS HOLDINGS INC · on record since Jan 4, 2006
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
Director at REPUBLIC AIRWAYS HOLDINGS INC · on record since Aug 14, 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 NORD RESOURCES CORP · on record since Jan 31, 2008
10% owner at JAVELIN PHARMACEUTICALS, INC · on record since May 15, 2008
10% owner at EPL OIL & GAS, INC. · on record since Sep 23, 2009
Chairman at ADELPHIA COMMUNICATIONS CORP · on record since Jul 14, 2003
10% owner at ADELPHIA COMMUNICATIONS CORP · on record since Jul 14, 2003
10% owner at GEOKINETICS INC · on record since Jul 16, 2003
10% owner at Rhino Resource Partners LP · on record since Sep 29, 2010
Director at Rhino Resource Partners LP · on record since Oct 7, 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
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 28, 2013
10% owner at · on record since Apr 15, 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
10% owner at · on record since Jun 22, 2015
Director by Deputization at · on record since Nov 19, 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

Insider trading activity of DAVIDSON CHARLES E

Transactions on record: 191; since Sep 9, 2003

Open-market buys: 3; $17.5M

Open-market sells: 162; $1.3B

Companies traded: 11; last filing Jun 22, 2026

Figures computed from official regulatory filings — .

Companies where DAVIDSON CHARLES E has traded

3 tx · Jun 22, 2026
7 tx · $1M · Jan 8, 2021
6 tx · $3.5M · Jan 25, 2016
27 tx · $465.7M · Nov 19, 2015
2 tx · $24.1K · Jan 8, 2015
21 tx · $26.1M · Jun 18, 2013
28 tx · $373.3M · Mar 13, 2012
46 tx · $80.8M · Aug 10, 2009
18 tx · $263.9M · Sep 6, 2007
20 tx · $40.9M · Mar 30, 2004
13 tx · $57.2M · Oct 14, 2003

Track record of DAVIDSON CHARLES E

Insufficient history for a statistical track record (fewer than 5 open-market buys).

Transaction history of DAVIDSON CHARLES E

Co-insiders of DAVIDSON CHARLES E

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Src
MAMMOTH ENERGY SERVICES, INC.Listing on record	Jun 22, 2026	Other	2,403,831	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	Other	4,066,610	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	Mar 14, 2024	Other	-535,366	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
NEPHROS INCListing on record	Jan 8, 2021	Award	3,196	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
NEPHROS INCListing on record	Oct 16, 2020	Award	166,667	6.00 USD	$1M	SEC
Rhino Resource Partners LPListing unverified	Jan 25, 2016	Sell	-159,216	0.52 USD	$82.8K	SEC
Rhino Resource Partners LPListing unverified	Jan 25, 2016	Sell	-599,631	0.52 USD	$311.8K	SEC
Rhino Resource Partners LPListing unverified	Jan 25, 2016	Sell	-6,010,265	0.52 USD	$3.1M	SEC
Diamondback Energy, Inc.Listing on record	Nov 19, 2015	Sell	-9,736	80.71 USD	$785.8K	SEC
Diamondback Energy, Inc.Listing on record	Nov 19, 2015	Sell	-15,013	79.60 USD	$1.2M	SEC
Rhino Resource Partners LPListing unverified	Oct 7, 2015	Award	121,952	—	n/a (No price was disclosed in the filing)	SEC
Diamondback Energy, Inc.Listing on record	Sep 4, 2015	Sell	-50,000	67.23 USD	$3.4M	SEC
Diamondback Energy, Inc.Listing on record	Sep 4, 2015	Sell	-70,000	68.42 USD	$4.8M	SEC
Diamondback Energy, Inc.Listing on record	Sep 1, 2015	Sell	-1,315	67.54 USD	$88.8K	SEC
Diamondback Energy, Inc.Listing on record	Sep 1, 2015	Sell	-240,000	68.45 USD	$16.4M	SEC
Diamondback Energy, Inc.Listing on record	Jun 22, 2015	Sell	-18,299	80.53 USD	$1.5M	SEC
Diamondback Energy, Inc.Listing on record	Mar 19, 2015	Sell	-24,040	71.81 USD	$1.7M	SEC
Diamondback Energy, Inc.Listing on record	Mar 19, 2015	Sell	-203,136	72.14 USD	$14.7M	SEC
Diamondback Energy, Inc.Listing on record	Mar 19, 2015	Sell	-4,455	71.25 USD	$317.4K	SEC
Diamondback Energy, Inc.Listing on record	Feb 3, 2015	Sell	-250,000	69.40 USD	$17.4M	SEC
Diamondback Energy, Inc.Listing on record	Feb 3, 2015	Sell	-47,493	72.14 USD	$3.4M	SEC
Diamondback Energy, Inc.Listing on record	Feb 3, 2015	Sell	-54,100	71.42 USD	$3.9M	SEC
Diamondback Energy, Inc.Listing on record	Jan 27, 2015	Sell	-194,412	67.84 USD	$13.2M	SEC
Diamondback Energy, Inc.Listing on record	Jan 27, 2015	Sell	-291,189	—	n/a (No price was disclosed in the filing)	SEC
Diamondback Energy, Inc.Listing on record	Jan 27, 2015	Sell	-539,941	68.21 USD	$36.8M	SEC

Company	Filed	Type	Qty	Price	Value · USD	Src
MAMMOTH ENERGY SERVICES, INC.Listing on record	Jun 22, 2026	Other	2,403,831	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	Other	4,066,610	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	Mar 14, 2024	Other	-535,366	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
NEPHROS INCListing on record	Jan 8, 2021	Award	3,196	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
NEPHROS INCListing on record	Oct 16, 2020	Award	166,667	6.00 USD	$1M	SEC
Rhino Resource Partners LPListing unverified	Jan 25, 2016	Sell	-159,216	0.52 USD	$82.8K	SEC
Rhino Resource Partners LPListing unverified	Jan 25, 2016	Sell	-599,631	0.52 USD	$311.8K	SEC
Rhino Resource Partners LPListing unverified	Jan 25, 2016	Sell	-6,010,265	0.52 USD	$3.1M	SEC
Diamondback Energy, Inc.Listing on record	Nov 19, 2015	Sell	-9,736	80.71 USD	$785.8K	SEC
Diamondback Energy, Inc.Listing on record	Nov 19, 2015	Sell	-15,013	79.60 USD	$1.2M	SEC
Rhino Resource Partners LPListing unverified	Oct 7, 2015	Award	121,952	—	n/a (No price was disclosed in the filing)	SEC
Diamondback Energy, Inc.Listing on record	Sep 4, 2015	Sell	-50,000	67.23 USD	$3.4M	SEC
Diamondback Energy, Inc.Listing on record	Sep 4, 2015	Sell	-70,000	68.42 USD	$4.8M	SEC
Diamondback Energy, Inc.Listing on record	Sep 1, 2015	Sell	-1,315	67.54 USD	$88.8K	SEC
Diamondback Energy, Inc.Listing on record	Sep 1, 2015	Sell	-240,000	68.45 USD	$16.4M	SEC
Diamondback Energy, Inc.Listing on record	Jun 22, 2015	Sell	-18,299	80.53 USD	$1.5M	SEC
Diamondback Energy, Inc.Listing on record	Mar 19, 2015	Sell	-24,040	71.81 USD	$1.7M	SEC
Diamondback Energy, Inc.Listing on record	Mar 19, 2015	Sell	-203,136	72.14 USD	$14.7M	SEC
Diamondback Energy, Inc.Listing on record	Mar 19, 2015	Sell	-4,455	71.25 USD	$317.4K	SEC
Diamondback Energy, Inc.Listing on record	Feb 3, 2015	Sell	-250,000	69.40 USD	$17.4M	SEC
Diamondback Energy, Inc.Listing on record	Feb 3, 2015	Sell	-47,493	72.14 USD	$3.4M	SEC
Diamondback Energy, Inc.Listing on record	Feb 3, 2015	Sell	-54,100	71.42 USD	$3.9M	SEC
Diamondback Energy, Inc.Listing on record	Jan 27, 2015	Sell	-194,412	67.84 USD	$13.2M	SEC
Diamondback Energy, Inc.Listing on record	Jan 27, 2015	Sell	-291,189	—	n/a (No price was disclosed in the filing)	SEC
Diamondback Energy, Inc.Listing on record	Jan 27, 2015	Sell	-539,941	68.21 USD	$36.8M	SEC