A
- AB Energy Opp. Mgmt. LLC
- Aethon Energy
- Alamo Borden County, LLC
- Alliance Bernstein
- Alleghany Capital Partners
- Alpine Energy Capital
- Alvarado 2014 LLC
- Ameredev II LLC
- American Patriot
- Amexco, LLC
- Amplify Energy
- Andeavor Corporation
- Apollo Management
- Approach Resources
- Arclight Capital Partners LLC
- Ares Management
- Armor Energy
- Armstrong Energy Corporation
- Aspen Midstream, LLC
- Atinum E&P Inc.
- Atlas Resource Partners, LP
- ATX Energy Partners
- Avenue Capital Group
- Aves Capital Management, L.P.
- Azure Midstream
B
- Bainbridge Uinta, LLC
- Ballard Petroleum Holdings
- Bank Of America
- Bank Of New York Mellon Trust Co
- Bank SNB
- Barclays Capital
- Basin Oil & Gas
- Bellatorum Resources
- Bepco LP
- BHP Consulting
- Big Sky Energy Advisors
- Big West Exploration and Production LLC
- Bishop Of Wheeling-Charleston
- Black Falcon Energy
- Black Hills Expl & Prod
- Black River Operating
- Black Shale Minerals, LLC
- Blackbeard Energy
- Blackbeard Operating
- Blackbuck Resources
- Blackgold Capital Management
- Bluefin Resources LLC
- Bluescape Resources
- Blue Maple Group
- BMO Capital Markets
- Boaz Energy II LLC
- BOK Financial
- Bounty Investments
- Bounty Minerals
- BP Capital LP
- Breck Operating Co
- Breitburn Operating LP
- Brigham Exploration
- Brigham Minerals LLC
- Broe Group
- Buffalo Oil & Gas
- Bufkin Holdings LLC
- Burk Royalty Co., Ltd.
- Burnett Petroleum Co
C
- Caerus Operating LLC
- Calyx Energy III
- Camelback Midstream
- Candor Midstream
- Cantey & Hanger LLP
- Canyon Creek Energy II
- Caprock Midstream
- Carbon California Company
- Carbon Energy
- Cardinal Midstream III
- Carson Private Capital, Inc.
- Carrier Petroleum (now Waste Mgmt)
- Casillas Petroleum Corp
- Castex Energy
- Castlerock Exploration LLC
- Castleton Commodities
- Catena Resources
- Caza Oil & Gas
- Cazadores Royalty Partners
- Centennial Mineral Holdings, LLC
- Century Exploration
- CH4 Energy
- Cardinal Midstream II
- Champion Lone Star
- Chaparral Energy Inc.
- Chesapeake Energy Corporation
- Chisholm Energy Holding, LLC
- Chisos Energy
- Citation Oil & Gas
- Citi Investment Group
- Citizens Financial Group
- Clearfork Resources LLC
- COERT Holdings 1 LLC
- COG Operating LLC (Concho)
- Cogent Midstream LLC
- Colony HB2 Energy
- Concho Resources (COG Oper)
- Confluence Resources
- ConocoPhillips
- Core Minerals
- Cortez Resources LLC
- CountryMark Cooperative Holding Corp
- Crescent Pass Energy LLC
- Crestline Investors Inc.
- Crestwood Equity Partners
- Crimson Energy Partners IV LLC
- Cross Timbers Energy
- Crownquest Operating LLC
- CSG Investments Inc.
- Cureton Midstream, LLC
- Curtis Companies, LLC
D
- Dara Energy
- DJ Simmons Inc.
- Daunis Properties
- Davis Exploration
- Delaware Basin Resources
- Denver Mineral & Royalty
- Desert Peak Minerals
- Desert Royalty Company
- Devonshire Investors
- Dollarhide Energy, LLC
- Double Eagle Energy Holding II LLC
- DoublePoint Energy
- DT Midstream
- DTE Midstream
- Dynamic Production Inc.
E
- E2 Energy Services, LLC
- Eagle Oil & Gas Co
- Eagle Valley Energy
- Earthstone Energy
- Echo Production
- Edge Natural Resources
- Elliott Management Corporation
- Elm Ridge Resources Inc.
- Empire Petroleum
- Enbridge Inc.
- EnCap Investments LLC
- EnCap Flatrock Midstream
- EnCore Permian Holdings, LLC
- Enduring Resources
- Enduro Resource Partners
- Enduro Royalty Trust
- Energy Capital Partners
- Energy Management Corp
- Energyquest
- Enervest LTD
- ENR Partners II
- Ensign Natural Resources
- Epic Permian
- ETX Energy LLC
- Evercore Group, LLC
- Evolution Midstream
- Excalibur Resources, LLC
F
- Fine Energy Nemaha, Inc.
- Finley Resources Inc.
- First Bank Southwest
- First Reserve Corp
- Five States Energy Co
- Flat Creek Resources
- Fleet Oil & Gas
- Fletcher Petroleum Co
- Foothills Energy LLC
- Foothills Resources Inc
- Foreland Resources LLC
- Formation Energy
- Fortress Investment Group
- Fortson Oil Company
- Forty Acres
- Four Corners Petroleum LLC
- FourPass Energy
- FourPoint Energy, LLC
- Franklin Mountain Energy
