| MIDSTATES PETROLEUM COMPANY, INC. |
US:AMPY |
| Apache Corporation |
US:APA |
| Antero Resources Corporation |
US:AR |
| Abraxas Petroleum Corporation |
US:AXAS |
| Battalion Oil Corporation |
US:BATL |
| Bonanza Creek Energy, Inc. |
US:BCEI |
| Brookfield Infrastructure Corporation |
US:BIPC |
| Borr Drilling Limited |
US:BORR |
| Barnwell Industries, Inc. |
US:BRN |
| Berry Corporation (bry) |
US:BRY |
| Black Stone Minerals, L.P. |
US:BSM |
| Baytex Energy Corp |
US:BTE |
| Centennial Resource Development, Inc. |
US:CDEV |
| Camber Energy, Inc. |
US:CEI |
| CNOOC Limited |
US:CEO |
| Crestwood Equity Partners LP |
US:CEQP |
| Chaparral Energy, Inc. |
US:CHAP |
| CKX Lands, Inc. |
US:CKX |
| Continental Resources, Inc. |
US:CLR |
| Canadian Natural Resources Limited |
US:CNQ |
| CNX Resources Corporation |
US:CNX |
| Cabot Oil & Gas Corporation |
US:COG |
| Callon Petroleum Company |
US:CPE |
| Crescent Point Energy Corporation |
US:CPG |
| Chesapeake Utilities Corporation |
US:CPK |
| California Resources Corporation |
US:CRC |
| Comstock Resources, Inc. |
US:CRK |
| Cross Timbers Royalty Trust |
US:CRT |
| Cenovus Energy Inc |
US:CVE |
| Concho Resources Inc. |
US:CXO |
| Dorchester Minerals, L.P. |
US:DMLP |
| Denbury Resources Inc. |
US:DNR |
| Devon Energy Corporation |
US:DVN |
| Dawson Geophysical Company |
US:DWSN |
| ENI S.p.A. |
US:E |
| Ecopetrol S.A. |
US:EC |
| ECA Marcellus Trust I |
US:ECT |
| VAALCO Energy, Inc. |
US:EGY |
| EOG Resources, Inc. |
US:EOG |
| Evolution Petroleum Corporation, Inc. |
US:EPM |
| Epsilon Energy Ltd. |
US:EPSN |
| EQT Corporation |
US:EQT |
| Enerplus Corporation |
US:ERF |
| Earthstone Energy, Inc. |
US:ESTE |
| Diamondback Energy, Inc. |
US:FANG |
| Falcon Minerals Corporation |
US:FLMN |
| Falcon Minerals Corporation |
US:FLMNW |
| New Concept Energy, Inc |
US:GBR |
| Goodrich Petroleum Corporation |
US:GDP |
| Gulfport Energy Corporation |
US:GPOR |
| Geopark Ltd |
US:GPRK |
| Gran Tierra Energy Inc. |
US:GTE |
| Hess Midstream LP |
US:HESM |
| Helmerich & Payne, Inc. |
US:HP |
| HighPoint Resources Corporation |
US:HPR |
| Houston American Energy Corporation |
US:HUSA |
| Independence Contract Drilling, Inc. |
US:ICD |
| Indonesia Energy Corporation Limited |
US:INDO |
| Ion Geophysical Corporation |
US:IO |
| Kosmos Energy Ltd. |
US:KOS |
| Kimbell Royalty Partners |
US:KRP |
| Lonestar Resources US Inc. |
US:LONE |
| Laredo Petroleum, Inc. |
US:LPI |
| Marine Petroleum Trust |
US:MARPS |
| Mid-Con Energy Partners, LP |
US:MCEP |
| Contango Oil & Gas Company |
US:MCF |
| Magnolia Oil & Gas Corporation |
US:MGY |
| Brigham Minerals, Inc. |
US:MNRL |
| Montage Resources Corporation |
US:MR |
| Marathon Oil Corporation |
US:MRO |
| Matador Resources Company |
US:MTDR |
| Mesa Royalty Trust |
US:MTR |
| Murphy Oil Corporation |
US:MUR |
| MV Oil Trust |
US:MVO |
| Mexco Energy Corporation |
US:MXC |
| Noble Energy Inc. |
US:NBL |
| Nabors Industries Ltd. |
US:NBR |
| Noble Corporation |
US:NE |
| NextDecade Corporation |
US:NEXT |
| Northern Oil and Gas, Inc. |
US:NOG |
| North European Oil Royality Trust |
US:NRT |
| Oasis Petroleum Inc. |
US:OAS |
| ONEOK, Inc. |
US:OKE |
| Oasis Midstream Partners LP |
US:OMP |
| Ovintiv Inc. |
US:OVV |
| Occidental Petroleum Corporation |
US:OXY |
| Pacific Drilling S.A. |
US:PACD |
| Par Pacific Holdings, Inc. |
US:PARR |
| Pembina Pipeline Corp. |
US:PBA |
| Petroleo Brasileiro S.A.- Petrobras |
US:PBR |
| Permian Basin Royalty Trust |
US:PBT |
| PDC Energy, Inc. |
US:PDCE |
| Precision Drilling Corporation |
US:PDS |
| Parsley Energy, Inc. |
US:PE |
| Pedevco Corp. |
US:PED |
| SandRidge Permian Trust |
US:PER |
| Panhandle Royalty Company |
US:PHX |
| PrimeEnergy Resources Corporation |
US:PNRG |
| PermRock Royalty Trust |
US:PRT |
| Patterson-UTI Energy, Inc. |
US:PTEN |
