Halliburton Company
HAL
Schlumberger Limited
SLB
RPC, Inc.
RES
U.S. Silica Holdings, Inc.
SLCA
NOV Inc.
NOV
Helix Energy Solutions Group, Inc.
HLX
Oceaneering International, Inc.
OII
Forum Energy Technologies, Inc.
FET
ProPetro Holding Corp.
PUMP
Oil States International, Inc.
OIS
Archrock, Inc.
AROC
NOW Inc.
DNOW
Dril-Quip, Inc.
DRQ
Smart Sand, Inc.
SND
Liberty Oilfield Services Inc.
LBRT
MRC Global Inc.
MRC
FTS International, Inc.
FTSI
TETRA Technologies, Inc.
TTI
Solaris Oilfield Infrastructure, Inc.
SOI
USA Compression Partners, LP
USAC
Newpark Resources, Inc.
NR
Flotek Industries, Inc.
FTK
Select Energy Services, Inc.
WTTR
DMC Global Inc.
BOOM
Cactus, Inc.
WHD
Ranger Energy Services, Inc.
RNGR
Exterran Corporation
EXTN
Natural Gas Services Group, Inc.
NGS
ION Geophysical Corporation
IO
Tidewater Inc.
TDW
NCS Multistage Holdings, Inc.
NCSM
Geospace Technologies Corporation
GEOS
CSI Compressco LP
CCLP
Nine Energy Service, Inc.
NINE
Cypress Environmental Partners, L.P.
CELP
Superior Drilling Products, Inc.
SDPI
Dawson Geophysical Company
DWSN
Profire Energy, Inc.
PFIE
Enservco Corporation
ENSV
National Energy Services Reunited Corp.
NESR
KLX Energy Services Holdings, Inc.
KLXE
U.S. Well Services, Inc.
USWS
Schlumberger Limited
SLB.PA
Baker Hughes Company
BKR
NexTier Oilfield Solutions Inc.
NEX
ChampionX Corporation
CHX
Bristow Group Inc.
VTOL
Halliburton Company
HAL.DE
Halliburton Company
0R23.L
Baker Hughes Company
0RR8.L
Basic Energy Services, Inc.
BASX
Deep Down, Inc.
DPDW
Forbes Energy Services Ltd.
FLSS
Greenway Technologies, Inc.
GWTI
Heron Lake BioEnergy, LLC
HLBYL
Key Energy Services, Inc.
KEGX
QS Energy, Inc.
QSEP
SMG Industries Inc.
SMGI
Victory Oilfield Tech, Inc.
VYEY
Weatherford International plc
WFRD
Expro Group Holdings N.V.
XPRO
Pardee Resources Company
PDER
Parker Drilling Company
PKDC
Cal Dive International, Inc.
CDVIQ
Foy-Johnston Inc.
FOYJ