Company lists · Data refreshed September 2026

Top 25 Upstream oil and gas operators based in Canada

Name: Upstream oil and gas operators based in Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 80 companies tracked

RevenueBase identified 80 upstream oil and gas operators headquartered in Canada as of September 2026 and tracks 8,443 professional contacts across them, including 1,507 with verified work emails. Calgary is the largest hub.

This list covers upstream oil and gas operators headquartered in Canada, 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 19, 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 19, 2026 86% judged on-target in blind review

80Companies

8,443Contacts tracked

1,507Verified emails

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The 25 largest upstream oil and gas operators based in Canada

Ranked by team size

Top 25 of 80 upstream oil and gas operators based in Canada, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to upstream oil and gas operators: 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	Ensign Energy Services	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	1,001-5,000	2,176 contacts →
	Indirect evidence “Ensign Energy Services Inc.” Source: RevenueBase Database · checked Sep 19, 2026
2	Encana Corporation	Strong evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	1,001-5,000	1,690 contacts →
	Strong evidence “Encana is a leading North American energy producer that is focused on growing its strong portfolio of diverse resource plays producing natural gas, oil and natural gas liquids.” Source: RevenueBase Database · checked Sep 19, 2026
3	Gran Tierra Energy	Strong evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	501-1,000	785 contacts →
	Strong evidence “Gran Tierra Energy Inc, together with its subsidiaries, is a company focused on oil and gas exploration and production in Azerbaijan, Canada, Colombia and Ecuador.” Source: RevenueBase Database · checked Sep 19, 2026
4	Enerplus	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	201-500	323 contacts →
	Indirect evidence “Enerplus is an independent North American exploration and production company focused on developing our high-quality assets through a disciplined, returns-based capital program.” Source: RevenueBase Database · checked Sep 19, 2026
5	Tamarack Valley Energy LTD TVE	Partial evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	51-200	156 contacts →
	Partial evidence “Tamarack Valley Energy Ltd (TVE) is an oil & energy company based out of, Calgary, Alberta, Canada.” Source: RevenueBase Database · checked Sep 19, 2026
6	Surge Energy INC	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	51-200	144 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
7	Divestco Geoscience	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	51-200	79 contacts →
	Indirect evidence “Divestco Geoscience is Canada’s largest integrated geoscience provider.” Source: RevenueBase Database · checked Sep 19, 2026
8	Citadel Drilling LTD	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	51-200	74 contacts →
	Indirect evidence “To put it bluntly, Citadel Drilling is different.” Source: RevenueBase Database · checked Sep 19, 2026
9	Liberty Energy - Canada	Strong evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	1,001-5,000	66 contacts →
	Strong evidence “Liberty is a leading North American oilfield services firm that offers one of the most innovative suites of completion services and technologies to onshore oil and natural gas…” Source: RevenueBase Database · checked Sep 19, 2026
10	Petro-Canada Fuels	Strong evidence	Ottawa, ON, CanadaHQ checked Sep 19, 2026	51-200	58 contacts →
	Strong evidence “Petro-Canada Fuels is an oil and gas company based out of 1985 Merivale Road, Ottawa, Ontario, Canada.” Source: RevenueBase Database · checked Sep 19, 2026
11	Barrel OIL Corp	Strong evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	51-200	41 contacts →
	Strong evidence “Barrel Oil Corp is a private integrated energy company engaged in exploration, production, and processing of crude oil, natural gas, and natural gas liquids.” Source: RevenueBase Database · checked Sep 19, 2026
12	Cayros	Strong evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	11-50	35 contacts →
	Strong evidence “is an independent consulting and technology company providing, and for the Oil & Gas Exploration and Production (E&P) industry.” Source: RevenueBase Database · checked Sep 19, 2026
13	Narag Energy Solutions	Strong evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	11-50	35 contacts →
	Strong evidence “Narag Energy Solutions is an innovative oil and gas services provider to clients who need rapid and accurate asset determination services, production optimization, engineering…” Source: RevenueBase Database · checked Sep 19, 2026
14	Northstar Downhole Specialists	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	51-200	27 contacts →
	Indirect evidence “GLOBAL REACH - RELENTLESS COMMITMENT Since 1979 Northstar has had the single mission to help customers unlock the full potential of every reservoir and be a global leader in…” Source: RevenueBase Database · checked Sep 19, 2026
15	Total Energy Services INC	Strong evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	1,001-5,000	23 contacts →
	Strong evidence “Through our distinct business lines we can provide equipment and expertise for your drilling, completion, production, transportation, oil and gas process equipment and natural gas…” Source: RevenueBase Database · checked Sep 19, 2026
16	Mcleay Geological Consultants 2006 LTD	Strong evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	11-50	20 contacts →
	Strong evidence “McLeay Geological Consultants (2006) Ltd.(“McLeay”) is an oil and gas service company providing the industry with high quality wellsite and remote geosteering personnel for…” Source: RevenueBase Database · checked Sep 19, 2026
17	Canam Pipe & Supply	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	11-50	15 contacts →
	Indirect evidence “International Supplier of Quality Oilfield Equipment A private company founded in 1990, Canam Pipe & Supply provides industry-leading oilfield technology and equipment and…” Source: RevenueBase Database · checked Sep 19, 2026
18	Western Basin Energy Corporation	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	11-50	13 contacts →
	Indirect evidence “Exploration & Production” Source: RevenueBase Database · checked Sep 19, 2026
19	Barnwell Of Canada, Limited	Strong evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	11-50	13 contacts →
	Strong evidence “Barnwell Of Canada, Limited is an Oil & Gas Company based in the City of Calgary, Alberta, Canada.” Source: RevenueBase Database · checked Sep 19, 2026
20	Lotus Creek Exploration INC	Strong evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	11-50	12 contacts →
	Strong evidence “Lotus Creek's vision is to emerge as the leading junior oil and gas exploration and production company that is renowned for differentiated profitability, operational excellence…” Source: RevenueBase Database · checked Sep 19, 2026
21	CT Energy	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	1-10	10 contacts →
	Indirect evidence “CT Energy is a privately owned and operated O&G service provider that specializes in innovative drilling and completions tools.” Source: RevenueBase Database · checked Sep 19, 2026
22	Synterra Technologies LTD	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	11-50	10 contacts →
	Indirect evidence “We are a premier exploration management firm that, through a robust suite of technical services, informs resource extraction activity for energy producers across Canada and the…” Source: RevenueBase Database · checked Sep 19, 2026
23	Tangle Creek Energy LTD	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	11-50	10 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
24	Stimulate Energy Services INC	Indirect evidence	Fort St John, BC, CanadaHQ checked Sep 19, 2026	11-50	9 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
25	Cuttings Edge Energy	Indirect evidence	Leduc, AB, CanadaHQ checked Sep 19, 2026	11-50	9 contacts →
	Indirect evidence “Cuttings Edge Energy is an intersection where innovation, unparalleled product performance, grass roots service and environmental stewardship come together to provide optimum end…” Source: RevenueBase Database · checked Sep 19, 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: upstream oil and gas operators. 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 upstream oil and gas operators.
Partial evidence: Its own public description names part of upstream oil and gas operators, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name upstream oil and gas operators. 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 80 upstream oil and gas operators based in Canada

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Upstream oil and gas operators based in Canada at a glance

As of Sep 19, 2026

17.8%Verified-email coverage

105.5Average contacts per company

11-50Median size (employees)

63.8%Largest-city concentration · Calgary

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Email recency for this list is measured worldwide rather than for Canada, so it is reported there. Company counts and contact totals on this page are exact for Canada, over 80 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 upstream oil and gas operators, 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 Canada whose own description of what they do matches “upstream oil and gas operators”. 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 upstream oil and gas operators), 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 upstream oil and gas operators, and records with no verified work email. Companies headquartered outside Canada 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, 1,507 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 19, 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.

Upstream oil and gas operators by metro

Upstream oil and gas operators in Calgary51

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 upstream oil and gas operators, 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 upstream oil and gas operators are there based in Canada?

RevenueBase identified 80 upstream oil and gas operators headquartered in Canada 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?

Ensign Energy Services, headquartered in Calgary, tops this list with the largest team on record.

Which city has the most upstream oil and gas operators?

Calgary leads with 51 headquartered companies, followed by Vancouver (3) and Edmonton (2).

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 1,507 verified decision-maker contacts tracked across these 80 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 19, 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.