- Baker Hughes
- Baytex Energy Corp.
- Calfrac Well Services Ltd.
- CARBO Ceramics Inc.
- Cenovus Energy Inc.
- Chart Industries, Inc.
- ConocoPhillips
- CVR Energy Inc.
- CVR Refining, LP
- Enbridge Energy Partners, L.P.
- Ensco PLC
- Enterprise Products Partners L.P.
- EQT Corporation
- EQT Midstream Partners, LP
- Frank’s International N.V.
- Helmerich & Payne, Inc. – Q3
- Independence Contract Drilling Inc.
- Marathon Petroleum Corporation
- Martin Midstream Partners L.P.
- MEG Energy Corp.
- Midcoast Energy Partners L.P.
- MPLX LP
- Murphy Oil Corporation
- National Oilwell Varco, Inc.
- Noble Corporation PLC
- Patterson-UTI Energy, Inc.
- Pioneer Energy Services
- Pioneer Natural Resources Company
- QEP Resources Inc.
- Royal Dutch Shell
- Total SA
- TransCanada Corporation
- Vanguard Natural Resources, LLC
- Weatherford International PLC
- Whiting Petroleum Corporation