Company lists · Data refreshed September 2026

Top 25 Oil and gas exploration companies based in Denver, United States

Name: Oil and gas exploration companies based in Denver, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 49 companies tracked

RevenueBase identified 49 oil and gas exploration companies headquartered in Denver, United States as of September 2026 and tracks 3,912 professional contacts across them, including 983 with verified work emails. Houston is the largest hub.

This list covers oil and gas exploration companies headquartered in Denver, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 17, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 17, 2026 86% judged on-target in blind review

49Companies

3,912Contacts tracked

983Verified emails

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The 25 largest oil and gas exploration companies based in Denver, United States

Ranked by team size

Top 25 of 49 oil and gas exploration companies based in Denver, United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to oil and gas exploration companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	SM Energy Company	Strong evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	501-1,000	2,176 contacts →
	Strong evidence “SM Energy Company is an independent energy company focused on the exploration, exploitation, development, acquisition, and production of natural gas and crude oil in the United…” Source: RevenueBase Database · checked Sep 17, 2026
2	Cimarex Energy	Strong evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	501-1,000	388 contacts →
	Strong evidence “The merger between Cimarex Energy and Cabot Oil & Gas was completed on October 1, 2021, creating the new E&P company, Coterra Energy.” Source: RevenueBase Database · checked Sep 17, 2026
3	Jonah Energy	Strong evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	201-500	197 contacts →
	Strong evidence “Jonah Energy LLC is a leading oil and gas exploration and development company headquartered in Denver, Colorado with assets in Wyoming, New Mexico, Kansas, Oklahoma, Ohio and…” Source: RevenueBase Database · checked Sep 17, 2026
4	Discovery Natural Resources LLC	Partial evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	51-200	186 contacts →
	Partial evidence “Discovery Natural Resources LLC is a domestic, onshore exploration and production company with over wells in operation in Texas.” Source: RevenueBase Database · checked Sep 17, 2026
5	Validus Energy	Strong evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	51-200	129 contacts →
	Strong evidence “What We Do Validus Energy is a Denver-based exploration and production company focused on the acquisition and exploitation of upstream oil and gas assets.” Source: RevenueBase Database · checked Sep 17, 2026
6	Petroleum Field Services, LLC	Indirect evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	51-200	94 contacts →
	Indirect evidence “As of January 1, 2017, Petroleum Field Services is rebranded as Ascent Geomatics Solutions.” Source: RevenueBase Database · checked Sep 17, 2026
7	Raisa Energy LLC	Strong evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	51-200	74 contacts →
	Strong evidence “Founded in 2014 and based in Denver with a tech hub in Cairo, Raisa Energy is an independent Oil & Gas exploration and production company that creates value by owning and leasing…” Source: RevenueBase Database · checked Sep 17, 2026
8	Phoenix Capital Group	Partial evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	51-200	36 contacts →
	Partial evidence “Phoenix Energy One, LLC (“Phoenix Energy”), formerly known as Phoenix Capital Group Holdings, LLC, is a leading energy company specializing in oil production, mineral rights…” Source: RevenueBase Database · checked Sep 17, 2026
9	GMT Exploration Company	Strong evidence	Denver, United StatesHQ checked Sep 17, 2026	11-50	35 contacts →
	Strong evidence “GMT Exploration Company LLC is a privately held independent oil and natural gas company currently engaged in the operation and development of oil and natural gas properties…” Source: RevenueBase Database · checked Sep 17, 2026
10	Enservco Corporation	Strong evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	201-500	21 contacts →
	Strong evidence “Enservco Corporation provides a variety of well-site services to the domestic on-shore oil and gas industry.” Source: RevenueBase Database · checked Sep 17, 2026
11	Samuel Gary Jr. & Associates, INC	Indirect evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	11-50	17 contacts →
	Indirect evidence “Since Sam Gary Jr.” Source: RevenueBase Database · checked Sep 17, 2026
12	Sundance Energy, INC	Strong evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	51-200	16 contacts →
	Strong evidence “Sundance Energy is a leading independent US E&P company focused on the exploration and production of oil and gas reserves in the Eagle Ford shale formation.” Source: RevenueBase Database · checked Sep 17, 2026
13	Hawkwood Energy	Strong evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	11-50	15 contacts →
	Strong evidence “Hawkwood Energy is a Denver-based independent exploration and production company focused on acquiring and economically developing oil and natural gas resources in East Texas.” Source: RevenueBase Database · checked Sep 17, 2026
14	Beech Resources, LLC	Indirect evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	11-50	14 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
15	Central Resources, INC	Strong evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	51-200	11 contacts →
	Strong evidence “We are an independent oil and gas producing and operating company with business concerns in the U.S, Argentina, Brazil, Canada and The Netherlands.” Source: RevenueBase Database · checked Sep 17, 2026
16	Infinity OIL & Gas, INC	Indirect evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	1-10	6 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
17	Aexco Petroleum INC	Indirect evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	11-50	5 contacts →
	Indirect evidence “AEXCO is an independent Denver, Colorado based energy company with a district office in Edmond, Oklahoma.” Source: RevenueBase Database · checked Sep 17, 2026
18	Allied Resource Partners	Strong evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	1-10	4 contacts →
	Strong evidence “Allied Resource Partners is an entity in the oil and gas sector, focusing on the exploration, development, and production of petroleum and natural gas resources.” Source: RevenueBase Database · checked Sep 17, 2026
19	Shaw Resources Management LLC	Indirect evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	1-10	4 contacts →
	Indirect evidence “Shaw Resources Management LLC is a privately held Management and Service Company headquartered in Denver, Colorado.” Source: RevenueBase Database · checked Sep 17, 2026
20	Lago Petroleum Consulting	Strong evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	1-10	4 contacts →
	Strong evidence “Lago Petroleum Consulting, based in Denver, Colorado, is a small, but growing geological and geophysical consulting firm, serving the upstream oil & gas industry.” Source: RevenueBase Database · checked Sep 17, 2026
21	James C Karo Associates	Strong evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	11-50	3 contacts →
	Strong evidence “Oil and Gas Land Services providing exploration and production companies with a full spectrum of land related actvities including: Permitting, Leasing, Surface Use Agreements…” Source: RevenueBase Database · checked Sep 17, 2026
22	White Eagle Exploration INC	Strong evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	1-10	3 contacts →
	Strong evidence “White Eagle Exploration Inc, founded in 1974, is a privately owned Denver-based energy corporation actively engaged in the exploration and development of oil and natural gas.” Source: RevenueBase Database · checked Sep 17, 2026
23	Transworld Systems Petroleum INC	Indirect evidence	Denver, United StatesHQ checked Sep 17, 2026	11-50	3 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
24	Mayo Geophysical Services Limited	Indirect evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	1-10	2 contacts →
	Indirect evidence “Mayo Geophysical Services Limited (MayoGeo) is a subsurface imaging company based in Colorado that applies innovative non-invasive geophysical methods to aid real-world…” Source: RevenueBase Database · checked Sep 17, 2026
25	Integrated Energy Resources	Indirect evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	1-10	1 contacts →
	Indirect evidence “Integrated Energy Resources (IER) manages assessments and operations for clients and private projects.” Source: RevenueBase Database · checked Sep 17, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: oil and gas exploration companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names oil and gas exploration companies.
Partial evidence: Its own public description names part of oil and gas exploration companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name oil and gas exploration companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 49 oil and gas exploration companies based in Denver, United States

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Oil and gas exploration companies based in Denver, United States at a glance

As of Sep 17, 2026

25.1%Verified-email coverage

79.8Average contacts per company

11-50Median size (employees)

606.1%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United States list rather than for Denver, so it is reported there. Company counts and contact totals on this page are exact for Denver, over 49 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among oil and gas exploration companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Denver, United States whose own description of what they do matches “oil and gas exploration companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names oil and gas exploration companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among oil and gas exploration companies, and records with no verified work email. Companies headquartered outside Denver are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 983 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 17, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Oil and gas exploration companies by metro in the United States

Oil and gas exploration companies in Houston297
Oil and gas exploration companies in Dallas85
Oil and gas exploration companies in Oklahoma City52
Oil and gas exploration companies in Denver49
Oil and gas exploration companies in Fort Worth46
Oil and gas exploration companies in Midland46
Oil and gas exploration companies in Tulsa29

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names oil and gas exploration companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many oil and gas exploration companies are there based in Denver, United States?

RevenueBase identified 49 oil and gas exploration companies headquartered in Denver, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

SM Energy Company, headquartered in Denver, tops this list with the largest team on record.

Which city has the most oil and gas exploration companies?

Houston leads with 297 headquartered companies, followed by Dallas (85) and Oklahoma City (52).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 983 verified decision-maker contacts tracked across these 49 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 17, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.