A – L
- Air Products & Chemicals, Inc.
- Algonquin Power & Utilities Corp.
- Apache Corporation
- Atmos Energy Corporation
- Berkshire Hathaway Energy Company
- BHP Group
- Borealis
- Bruce Power L.P.
- California Resources Corporation
- CEPSA Group
- CNOOC Petroleum North America ULC
- ConocoPhillips Company
- Consolidated Edison Inc.
- Delek US Holdings, Inc.
- Dominion Energy, Inc.
- The Dow Chemical Company
- Duke Energy Corporation
- Eastman Chemical Company
- Emera Incorporated
- Energy Transfer LP
- ENI S.p.A.
- EPCO Inc.
- Equinor
- Exxon Mobil Corporation
- Formosa Plastics Corporation, U.S.A.
- Hess Corporation
- Husky Energy Inc.
- Lyondell Chemical Company
M – X
- Marathon Oil Corporation
- Marathon Petroleum Corporation
- Motiva Enterprises LLC
- Murphy Oil Corporation
- National Fuel Gas
- NextEra Energy, Inc
- NiSource Inc.
- Noble Energy, Inc.
- NOVA Chemicals Corporation
- Occidental Petroleum Corporation
- Santos Limited
- Sasol Limited
- Sempra Energy
- Southwest Gas Holdings, Inc.
- Spire Inc.
- Suncor Petro Cda.
- Teck Resources Limited
- TOTAL S.A.
- Valero Energy Corporation
- WGL Holdings, Inc.
The Williams Companies Inc.
