| # | Company | Employees |
|---|---|---|
| 1 |
Chesapeake Energychk.com
An Oklahoma City-based oil and gas company focused on responsibly developing leading positions in top US plays and aiming for net zero GHG emissions by 2035 |
2,567 |
| 2 |
Continental Resourcesclr.com
Independent oil producer focused on exploration and production in major U.S. basins, driving American energy independence and market leadership. |
1,498 |
| 3 |
SandRidge Energysandridgeenergy.com
An oil and natural gas exploration and production entity focusing on high-return projects in the US Mid-Continent and Niobrara Shale regions |
819 |
| 4 |
Cactus Drilling Cocactusdrlg.com
A leading domestic land drilling contractor in the US, providing skilled personnel and high-quality equipment to meet customer drilling needs safely and effectively |
567 |
| 5 |
Enable Midstream Partnersenablemidstream.com
Gathering, processing, transportation, and storage of oil and natural gas across the United States, focusing on midstream infrastructure. |
535 |
| 6 |
Kimray, Inckimray.com
A manufacturer based in Oklahoma City creating oil and gas control equipment since 1948 Specializing in temperature, level, flow, and pressure control solutions |
532 |
| 7 |
WPX Energydevonenergy.com
A company recently acquired by Devon Energy (NYSE: DVN), specializing in a specific industry or services as part of the acquisition |
454 |
| 8 |
Ascent Resourcesascentresources.com
Leading independent energy company focused on acquiring, developing, and producing natural gas and oil in the Appalachian Basin, particularly Ohio Offering equal employment opportunities to all |
430 |
| 9 |
Flywheel Energy, LLCflywheelenergy.com
Private energy company specializing in acquiring and operating large US oil and gas assets, with a focus on the Rockies and Mid-Continent regions |
400 |
| 10 |
Gulfport Energy Corporationgulfportenergy.com
An independent exploration and production company focused on natural gas in the Appalachia and Anadarko basins, with a strategy for sustainable value creation |
297 |
| 11 |
Unit Drilling Companyunitcorp.com
A leading drilling company in the United States with 58 years of experience operating super-spec rigs in key basins, emphasizing safety, efficiency, and customer satisfaction |
242 |
| 12 |
Canvas Energycanvasenergy.com
An independent oil and gas exploration company focusing on leasehold in the rich gas window of the Anadarko Basin, primarily targeting Meramec, Osage, and Woodford formations |
217 |
| 13 |
MACH Resourcesmachresources.com
MACH Resources is a growth-oriented company acquiring and maximizing responsible development of oil and gas assets in America's top producing basins |
187 |
| 14 |
Mercer Valve Co., Inc.mercervalve.net
A company focused on delivering high-quality pressure relief valves with patented technology, competitive pricing, timely delivery, and professional services |
186 |
| 15 |
Downingdowningusa.com
An American oilfield solutions provider specializing in pressure-control technologies, offering wellhead systems and frac equipment to enhance safety and efficiency in the industry |
181 |
| 16 |
Dudley Land Companydudley-land.com
A full-service land company with five regional offices, offering experienced professionals, cutting-edge technology, and exceptional results in land services nationwide |
180 |
| 17 | 
ACCESS MIDSTREAM PARTNERS L.Pwilliams.com
A North American energy infrastructure company and natural gas processor leading in the industry |
176 |
| 18 |
Legend Energy Servicescrystalcactus.com
A premier coiled tubing service provider with service centers across the US, offering expertise, high-capacity equipment, and support for oilfield applications |
147 |
| 19 |
American Energy Partners, LPamericanenergypartners.com
A dynamic company in the American oil and gas industry, seeking top talent to lead the way in exploration and production |
88 |
| 20 |
MidCentralmidcentralenergy.com
An asset performance management company in the energy industry, emphasizing customer service, data transparency, technology, and innovation to maximize returns and optimize resources |
88 |
| 21 |
Sweatt Constructionsweattconstruction.com
An oil and energy company based in Oklahoma City, specializing in construction services within the industry |
57 |
| 22 |
Basin Engineeringbasinengineering.com
Energy engineering and operations consulting firm specializing in drilling, completion, production operations, and petroleum engineering for oil and gas companies worldwide |
46 |
| 23 |
PostRock Energy Corporationpstr.com
An energy corporation focused on acquiring, exploring, and producing crude oil and natural gas in Kansas, Oklahoma, and the Appalachian Basin |
40 |
| 24 |
Duncan Oil Properties, Inc.wdoil.com
Privately-held oil and gas exploration and production company with a long history, focusing on drilling opportunities and sustainable growth through conservative financial practices |
40 |
| 25 |
CORKEN - an IDEX Energy businesscorken.com
Global leader in industrial compressors, pumps, and accessories for liquefied gas transfer, air boosting, vapor recovery, with a strong commitment to customer service and innovation |
39 |
| 26 |
Mammoth Energy Servicesmammothenergy.com
An integrated oilfield service company specializing in growth-oriented operations, providing various services for exploration and development of North American onshore unconventional oil and gas reserves |
38 |
| 27 |
MidCentral Energymidcentralenergy.com
A company specializing in energy industry services, providing customer service, asset management, data transparency, technology, and innovation to optimize resources and reduce costs |
37 |
| 28 |
Circle 9 Resources LLCcircle9llc.com
An Oklahoma City based energy company specializing in acquiring and developing oil and natural gas resources in East Central Oklahoma |
30 |
| 29 |
89 Energyeightynine.energy
A growth-oriented oil and gas exploration company in the Mid-Continent region, focused on creating value for partners, investors, and landowners |
28 |
| 30 |
Novo Oil and Gas, LLCnovoog.com
A privately held oil and gas company based in Oklahoma City focused on creating value through innovative exploration in liquids-rich regions |
26 |
| 31 |
TSI Flow Productstsiflowproducts.com
A leading provider of innovative flow control equipment, known for exceptional customer service, with locations across the US and Canada |
23 |
| 32 |
White Star Petroleum, LLCwstr.com
A growing independent oil and natural gas exploration company based in Oklahoma City, focused on expanding and developing resources responsibly |
21 |
| 33 |
Spartan Energy Servicesspartanenergyservices.com
A leading provider of pipeline, facilities, maintenance, construction, and integrity solutions in 10 states, focused on hiring, cultivating talent, and family-oriented values |
21 |
| 34 |
EnerQuest Oil & Gas, LLCenerquest.net
A successful exploration and development company based in Oklahoma, with diverse oil and gas assets and a disciplined investment approach |
18 |
| 35 |
osebergoseberg.io
Next-gen oil & gas data analytics company transforming public regulatory data into actionable intelligence, offering B2B SaaS products for rapid analysis |
14 |
| 36 |
Cheyenne Petroleum Company Limited Partnershipcheypet.com
A trusted and responsible energy company pursuing growth opportunities with expertise in the energy field |
10 |
| 37 |
ViNtrol, Inc.vintrol.com
Manufacturer of flow control products for the oil and gas industry, offering a comprehensive range of valve solutions with customized engineering options |
9 |
| 38 |
Beasley Oil
An Oklahoma-based oil & energy company specializing in the production and distribution of oil products |
8 |
| 39 |
Impact Energy Operating, LLCimpactenergy.us
A privately held company operating in the oil and gas industry |
5 |
| 40 |
SENEX Energy Partners, LLC.senexep.com
A seasoned team pursues oil and gas opportunities worldwide by evaluating, drilling, and developing conventional and unconventional resources with solid geological and financial analysis |
2 |
| 41 |
Park Energy Servicesparkenergyservices.com
An oil and energy company located in Oklahoma City, specializing in providing energy services to the industry in the United States |
2 |
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Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 24, 2026.
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