Company lists · Data refreshed September 2026

Top 25 Infrastructure conglomerates based in Canada

RevenueBase identified 591 infrastructure conglomerates headquartered in Canada as of September 2026 and tracks 105,459 professional contacts across them, including 47,213 with verified work emails. Calgary is the largest hub.

This list covers infrastructure conglomerates 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 20, 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 20, 2026 86% judged on-target in blind review
591Companies
105,459Contacts tracked
47,213Verified emails
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The 25 largest infrastructure conglomerates based in Canada

Ranked by team size
Top 25 of 591 infrastructure conglomerates based in Canada, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure conglomerates: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceMontreal, QC, CanadaHQ checked Sep 20, 202610001+22,733 contacts →

Indirect evidence

“We are a world-class engineering services and nuclear organization.”

Source: RevenueBase Database · checked Sep 20, 2026
2Indirect evidenceMississauga, ON, CanadaHQ checked Sep 20, 20265,001-10,00010,272 contacts →

Indirect evidence

“Our organization is passionately committed to the pursuit of a better world through positive change.”

Source: RevenueBase Database · checked Sep 20, 2026
3Indirect evidenceMontreal, QC, CanadaHQ checked Sep 20, 202610001+10,015 contacts →

Indirect evidence

“We are one of the world’s leading professional services firms, uniting our engineering, advisory and science-based expertise to shape communities to advance humanity.”

Source: RevenueBase Database · checked Sep 20, 2026
4Indirect evidenceMontreal, QC, CanadaHQ checked Sep 20, 202610001+9,992 contacts →

Indirect evidence

“SNC Lavalin is now AtkinsRéalis.”

Source: RevenueBase Database · checked Sep 20, 2026
5Partial evidenceVancouver, BC, CanadaHQ checked Sep 20, 20265,001-10,0006,184 contacts →

Partial evidence

“The Ledcor Group of Companies is one of North America’s most diversified construction companies, serving the building, heavy industrial, civil and Infrastructure, mining…”

Source: RevenueBase Database · checked Sep 20, 2026
6Partial evidenceToronto, ON, CanadaHQ checked Sep 20, 202610001+5,565 contacts →

Partial evidence

“Aecon Group Inc.(TSX: ARE) is a North American construction and infrastructure development company with global experience.”

Source: RevenueBase Database · checked Sep 20, 2026
7Indirect evidenceMississauga, ON, CanadaHQ checked Sep 20, 20265,001-10,0004,948 contacts →

Indirect evidence

“EllisDon is a leading construction and building services company that delivers complex, high-performance projects across Canada and internationally.”

Source: RevenueBase Database · checked Sep 20, 2026
8Indirect evidenceEdmonton, AB, CanadaHQ checked Sep 20, 20261,001-5,0002,511 contacts →

Indirect evidence

“Clean water, reliable electricity, drainage services and natural gas are at the heart of what we do.”

Source: RevenueBase Database · checked Sep 20, 2026
9Indirect evidenceAB, CanadaHQ checked Sep 20, 20265,001-10,0002,335 contacts →

Indirect evidence

“ATCO is a global leader in housing, energy and defence, delivering the essential services people and communities depend on every day.”

Source: RevenueBase Database · checked Sep 20, 2026
10Indirect evidenceUsa, ON, CanadaHQ checked Sep 20, 20265,001-10,0001,364 contacts →

Indirect evidence

“Built on a foundation of excellence, FlatironDragados operates in the United States and Canada through FlatironDragados USA and FlatironDragados Canada.”

Source: RevenueBase Database · checked Sep 20, 2026
11Indirect evidenceMarkham, ON, CanadaHQ checked Sep 20, 20261,001-5,0001,246 contacts →

Indirect evidence

“Our work makes the world work.”

Source: RevenueBase Database · checked Sep 20, 2026
12Indirect evidenceEdmonton, AB, CanadaHQ checked Sep 20, 20261,001-5,0001,112 contacts →

Indirect evidence

“Headquartered in Edmonton, Alberta - Valard is Canada’s premier utility contractor, with full-service capabilities for transmission, distribution, substations, foundations…”

Source: RevenueBase Database · checked Sep 20, 2026
13Partial evidenceToronto, ON, CanadaHQ checked Sep 20, 2026501-1,000992 contacts →

Partial evidence

Infrastructure Ontario (IO) is a world class agency that creates value out of the public assets of the province, to build a connected and competitive Ontario.”

Source: RevenueBase Database · checked Sep 20, 2026
14Indirect evidenceCalgary, AB, CanadaHQ checked Sep 20, 2026501-1,000991 contacts →

Indirect evidence

“Bantrel is an engineering, procurement, construction and construction management (EPCM) services company.”

Source: RevenueBase Database · checked Sep 20, 2026
15Indirect evidenceQuebec, QC, CanadaHQ checked Sep 20, 2026501-1,000677 contacts →

Indirect evidence

“Founded in 1963, Norda Stelo is one of Canada's leading engineering firms, with operations in some 50 countries.”

Source: RevenueBase Database · checked Sep 20, 2026
16Indirect evidenceVancouver, BC, CanadaHQ checked Sep 20, 2026501-1,000659 contacts →

Indirect evidence

“Allnorth is a multi-disciplinary engineering, project delivery, and construction services company.”

Source: RevenueBase Database · checked Sep 20, 2026
17Partial evidenceEdmonton, AB, CanadaHQ checked Sep 20, 2026501-1,000611 contacts →

Partial evidence

“At ISL, we share an enthusiasm for community infrastructure.”

Source: RevenueBase Database · checked Sep 20, 2026
18Indirect evidenceMontreal, QC, CanadaHQ checked Sep 20, 20261,001-5,000560 contacts →

Indirect evidence

“Une ingénierie multidisciplinaire, passionnée et indépendante Chez Artelia, nous croyons que chaque projet est une opportunité unique de créer des solutions pour une vie positive.”

Source: RevenueBase Database · checked Sep 20, 2026
19Partial evidenceCalgary, AB, CanadaHQ checked Sep 20, 2026501-1,000498 contacts →

Partial evidence

“Surerus Murphy Joint Venture (SMJV) brings together two leading infrastructure companies, Surerus Pipeline Inc.”

Source: RevenueBase Database · checked Sep 20, 2026
20Indirect evidenceOttawa, ON, CanadaHQ checked Sep 20, 2026501-1,000475 contacts →

Indirect evidence

“Starting with a single-axle dump truck in 1952, R.W.”

Source: RevenueBase Database · checked Sep 20, 2026
21Indirect evidenceNisku, AB, CanadaHQ checked Sep 20, 20261,001-5,000436 contacts →

Indirect evidence

“One Partner.”

Source: RevenueBase Database · checked Sep 20, 2026
22Partial evidenceBrossard, QC, CanadaHQ checked Sep 20, 20261,001-5,000377 contacts →

Partial evidence

“Eurovia Québec, filiale de VINCI Construction, est l’un des principaux acteurs de la construction d’infrastructures de transport et d’aménagements urbains.”

Source: RevenueBase Database · checked Sep 20, 2026
23Indirect evidenceFort Mcmurray, AB, CanadaHQ checked Sep 20, 2026501-1,000374 contacts →

Indirect evidence

“Bouchier Canada’s leading Indigenous & integrated site services business, exceeding expectations relating to safety and service delivery, while inspiring and supporting our…”

Source: RevenueBase Database · checked Sep 20, 2026
24Partial evidenceMarkham, ON, CanadaHQ checked Sep 20, 2026201-500370 contacts →

Partial evidence

“LEA Group (LEA) is a privately-held, global consulting firm providing planning, engineering design, and construction administration services for urban infrastructure projects.”

Source: RevenueBase Database · checked Sep 20, 2026
25Indirect evidenceEdmonton, AB, CanadaHQ checked Sep 20, 2026501-1,000367 contacts →

Indirect evidence

“Forbes Bros.”

Source: RevenueBase Database · checked Sep 20, 2026

Showing 25 of 591 infrastructure conglomerates based in Canada

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Infrastructure conglomerates based in Canada at a glance

As of Sep 20, 2026
44.8%Verified-email coverage
178.4Average contacts per company
11-50Median size (employees)
8.6%Largest-city concentration · Calgary
Sep 20, 2026Page data refreshed

Companies by employee count

1-10
139
11-50
169
51-200
134
201-500
71
501-1,000
38
1,001-5,000
24
5,001-10,000
10
10001+
6

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 591 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 infrastructure conglomerates, 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 “infrastructure conglomerates”. 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 infrastructure conglomerates), 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 infrastructure conglomerates, 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, 47,213 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 20, 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.

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 infrastructure conglomerates, 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 infrastructure conglomerates are there based in Canada?

RevenueBase identified 591 infrastructure conglomerates 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?

Atkinsréalis, headquartered in Montreal, tops this list with the largest team on record.

Which city has the most infrastructure conglomerates?

Calgary leads with 51 headquartered companies, followed by Toronto (43) and Edmonton (26).

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 47,213 verified decision-maker contacts tracked across these 591 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 20, 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.