Company lists · Data verified August 2026

Top 25 Constitutional law firms based in Canada

Name: Constitutional law firms based in Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 198 companies tracked

There are 198 constitutional law firms headquartered in Canada (RevenueBase, August 2026). RevenueBase tracks 2,111 professional contacts across them, including 1,170 with verified work emails and 109 with mobile numbers. Toronto is the largest hub.

This list covers constitutional law firms headquartered in Canada, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

198Companies

2,111Contacts tracked

1,170Verified emails

109Mobile numbers

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The 25 largest constitutional law firms based in Canada

Ranked by team size

Top 25 of 198 constitutional law firms based in Canada, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Lerners LLP	Kitchener, ON	201-500	447	302
2	Weirfoulds LLP	Toronto, ON	201-500	282	212
3	Pace LAW Firm	Toronto, ON	51-200	123	83
4	Merchant LAW Group LLP	Regina, SK	11-50	55	47
5	Aikins, Macaulay & Thorvaldson LLP	Winnipeg, MB	201-500	49	11
6	Walsh LLP	Calgary, AB	51-200	47	33
7	Cavalluzzo LLP	Toronto, ON	51-200	44	30
8	LMS Lawyers LLP	Kanata, ON	11-50	37	17
9	Prowse Barrette LLP	Edmonton, AB	11-50	36	27
10	Riendeau Avocats	Montreal, QC	11-50	31	22
11	Duncan, Linton LLP	Waterloo, ON	11-50	30	23
12	Cook Roberts LLP	Victoria, BC	11-50	23	18
13	Speigel Nichols FOX LLP	Mississauga, ON	11-50	21	16
14	Dewart Gleason LLP	Toronto, ON	11-50	20	15
15	Gauthier Bédard Avocats INC	Chicoutimi, QC	11-50	20	11
16	Brimage LAW Group	Port Rowan, ON	11-50	18	16
17	Velletta Pedersen Christie Lawyers	Victoria, BC	11-50	18	11
18	Lakes, Whyte LLP	North Vancouver, BC	11-50	17	12
19	Matlow, Miller, Cummins, Thrasher, LLP	Cambridge, ON	11-50	15	5
20	Grey Casgrain S.E.N.C.	Montreal, QC	11-50	15	1
21	Duboff Edwards Schachter LAW Corporation	Winnipeg, MB	11-50	14	8
22	Chenette, Boutique DE Litige INC	Montreal, QC	11-50	13	11
23	George Murray Shipley Bell, LLP	Sarnia, ON	11-50	13	9
24	Bélanger Paradis Avocats INC	Boucherville, QC	11-50	13	9
25	Campbell LEA Barristers & Solicitors	Charlottetown, PE	11-50	13	4

Showing 25 of 198 constitutional law firms based in Canada

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Constitutional law firms based in Canada at a glance

As of Aug 28, 2026

1-10Median size (employees)

TorontoLargest hub · 39 HQs

109Contacts with mobile numbers

4Emails re-verified in last 30 days

Companies by employee count

1-10

135

11-50

51-200

201-500

Constitutional law firms by metro

Metro	Companies
Constitutional law firms in Toronto	39
Constitutional law firms in Montreal	18
Constitutional law firms in Edmonton	12
Constitutional law firms in Vancouver	12
Constitutional law firms in Winnipeg	10
Constitutional law firms in Ottawa	10
Constitutional law firms in Mississauga	9
Constitutional law firms in Calgary	8

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “constitutional law firms”, with match quality audited by blind human judging, and headquartered in Canada.
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: Contact records re-verify on a rolling cadence; 4 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many constitutional law firms are there based in Canada?

There are 198 constitutional law firms headquartered in Canada as of August 2026 (RevenueBase).

What is the largest company on this list?

Lerners LLP, headquartered in Kitchener, tops this list with the largest team on record.

Which city has the most constitutional law firms?

Toronto leads with 39 headquartered companies, followed by Montreal (18) and Edmonton (12).

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 1,170 verified decision-maker contacts tracked across these 198 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.