Company lists · Data refreshed September 2026
Top 20 Big 5 law firms based in London, Canada
RevenueBase identified 25 company matches for big 5 law firms associated with London, Canada as of September 2026 and tracks 1,248 professional contacts across them, including 840 with verified work emails. Across Canada, Toronto is the largest hub for this category (411 companies); London has 25.
This list covers company matches for big 5 law firms associated with London, Canada, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 23, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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.
The 20 largest big 5 law firms based in London, Canada
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 450 contacts → | ||||
Exact match “Lerners LLP is a full service law firm that has grown to become one of Ontario’s largest firms.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase | |||||
| 2 | 271 contacts → | ||||
Exact match “Siskinds is one of Southwestern Ontario’s leading law firms.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase | |||||
| 3 | 176 contacts → | ||||
Exact match “Harrison Pensa LLP is a full-service law firm with expertise in litigation, business law and real estate, and a strong focus in family, wills and estate, and personal injury law.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase | |||||
| 4 | 130 contacts → | ||||
Exact match “McKenzie Lake is a full-service law firm with offices in Guelph, London and Strathroy, Ontario.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase | |||||
| 5 | 104 contacts → | ||||
Exact match “Founded in London ON in 1974, Cohen Highley, opened its sixth branch office in Windsor ON in 2023.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase | |||||
| 6 | 18 contacts → | ||||
Exact match “The business model for Scott Petrie LLP Law Firm, from the outset, has been the direct delivery of competent legal services by lawyers and staff working within specific areas of…” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase | |||||
| 7 | 17 contacts → | ||||
Exact match “Dyer Brown LLP is a company based out of 495 Richmond St, London, Ontario, Canada.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase | |||||
| 8 | 12 contacts → | ||||
Exact match “At Drake Law, we pride ourselves on delivering exceptional legal services and innovative solutions that exceed expectations.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase | |||||
| 9 | 11 contacts → | ||||
Exact match “Wallace Smith Lawyers is a boutique law firm based in the heart of London, Ontario, offering specialized services in civil litigation with a focus on personal injury, insurance…” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase | |||||
| 10 | 10 contacts → | ||||
Exact match “Started in 1996, the litigation law firm of Advocates LLP has been a pioneer in the use of integrated computer technology and its application in the practice of law.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase | |||||
| 11 | 8 contacts → | ||||
Exact match “Many people go through their entire lives without contacting a lawyer or law firm.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase | |||||
| 12 | 7 contacts → | ||||
Exact match “At Lexcor Business Lawyers LLP, our trade-mark is Strictly Business® - which simply means that our practice is restricted to business law - providing first class legal advice to…” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase | |||||
| 13 | 6 contacts → | ||||
Exact match “We believe that strength of a law firm does not rest in the number of lawyers within the firm, but in the commitment of each lawyer to provide the highest possible degree of…” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase | |||||
| 14 | 6 contacts → | ||||
Exact match “Whether you’re involved in the criminal justice system, looking to buy/sell a home, or just plan for the future, we offer wise guidance and support that will save you time, energy…” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase | |||||
| 15 | 3 contacts → | ||||
Exact match “Belecky & Belecky is a full-service general practice law firm which has provided legal services to London and South-Western Ontario for over 40 years.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase | |||||
| 16 | 2 contacts → | ||||
Exact match “Chinneck Law Professional Corporation is a Law Firm located at 37 Ridout St S, LONDON, Ontario, Canada.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase | |||||
| 17 | 2 contacts → | ||||
Exact match “Menear Worrad & Associates has been Specializing in Service for over 40 years.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase | |||||
| 18 | 1 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase | |||||
| 19 | 1 contacts → | ||||
Exact match “As a dedicated legal practitioner, I specialize in a diverse range of areas including commercial litigation, shareholder/partnership disputes, liquor license regulatory defense…” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase | |||||
| 20 | 1 contacts → | ||||
Exact match “Operating as a small firm in London, Ontario, Jeff Conway Law creates a personable, attentive and client-oriented environment.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “big 5 law firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 20 of 25 big 5 law firms based in London, Canada
See the full list, filter by size, metro and specialty, and access 840 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Big 5 law firms based in London, Canada at a glance
As of Sep 23, 2026Companies by employee count
Email recency for this list is measured across the whole Canada list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 25 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with London, Canada whose business descriptions match “big 5 law firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- 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 displayed company carries at least one verified work email. RevenueBase tracks 840 professional contacts with verified work emails across the full matched dataset. 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 23, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Big 5 law firms by metro in Canada
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “big 5 law firms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many big 5 law firms are there based in London, Canada?
RevenueBase identified 25 company matches for big 5 law firms associated with London, Canada as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
Lerners LLP tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city in Canada has the most big 5 law firms?
Toronto leads Canada with 411 company records, followed by Vancouver (140) and Montreal (136). London has 25.
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 840 professional contacts with verified work emails tracked across these 25 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 23, 2026.
Ready to reach these companies? Verified emails and direct dials for all 25 big 5 law firms based in London, Canada. Start with a free account, no credit card.
Download this list →Related lists
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- Big 5 law firms based in Belgium
- Big 5 law firms based in Mexico
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 SmartSearch, 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.
More company lists
Company intelligence · public preview
Top 20 big 5 law firms based in London, Canada
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 25 matching company records for big 5 law firms based in London, Canada, with 1,248 tracked contacts and 840 verified work emails.
This public preview shows 20 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 23, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 20 big 5 law firms based in London, Canada
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Lerners LLPlerners.caHQ: London, ON, CanadaReported employees: 201-500 | London, ON, Canada | 201-500 | Exact match | 450 contacts → |
“Lerners LLP is a full service law firm that has grown to become one of Ontario’s largest firms.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Siskinds LLPsiskinds.comHQ: London, ON, CanadaReported employees: 51-200 | London, ON, Canada | 51-200 | Exact match | 271 contacts → |
“Siskinds is one of Southwestern Ontario’s leading law firms.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Harrison Pensa LLPharrisonpensa.comHQ: London, ON, CanadaReported employees: 51-200 | London, ON, Canada | 51-200 | Exact match | 176 contacts → |
“Harrison Pensa LLP is a full-service law firm with expertise in litigation, business law and real estate, and a strong focus in family, wills and estate, and personal injury law.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Mckenzie Lake Lawyers LLPmckenzielake.comHQ: London, ON, CanadaReported employees: 51-200 | London, ON, Canada | 51-200 | Exact match | 130 contacts → |
“McKenzie Lake is a full-service law firm with offices in Guelph, London and Strathroy, Ontario.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Cohen Highley LLPcohenhighley.comHQ: London, ON, CanadaReported employees: 51-200 | London, ON, Canada | 51-200 | Exact match | 104 contacts → |
“Founded in London ON in 1974, Cohen Highley, opened its sixth branch office in Windsor ON in 2023.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Scott Petrie LLP LAW Firmscottpetrie.com HQ: London, ON, CanadaReported employees: 1-10 | London, ON, Canada | 1-10 | Exact match | 18 contacts → |
“The business model for Scott Petrie LLP Law Firm, from the outset, has been the direct delivery of competent legal services by lawyers and staff working within specific areas of…” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Dyer Brown LLPdyerbrownlaw.com HQ: London, ON, CanadaReported employees: 11-50 | London, ON, Canada | 11-50 | Exact match | 17 contacts → |
“Dyer Brown LLP is a company based out of 495 Richmond St, London, Ontario, Canada.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Drake LAWdrakelaw.ca HQ: London, ON, CanadaReported employees: 11-50 | London, ON, Canada | 11-50 | Exact match | 12 contacts → |
“At Drake Law, we pride ourselves on delivering exceptional legal services and innovative solutions that exceed expectations.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Wallace Smith Lawyerswallacesmith.caHQ: London, ON, CanadaReported employees: 11-50 | London, ON, Canada | 11-50 | Exact match | 11 contacts → |
“Wallace Smith Lawyers is a boutique law firm based in the heart of London, Ontario, offering specialized services in civil litigation with a focus on personal injury, insurance…” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Advocates LLPadvocatesllp.comHQ: London, ON, CanadaReported employees: 1-10 | London, ON, Canada | 1-10 | Exact match | 10 contacts → |
“Started in 1996, the litigation law firm of Advocates LLP has been a pioneer in the use of integrated computer technology and its application in the practice of law.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Hassan LAWhassanlaw.comHQ: London, ON, CanadaReported employees: 11-50 | London, ON, Canada | 11-50 | Exact match | 8 contacts → |
“Many people go through their entire lives without contacting a lawyer or law firm.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Lexcor Business Lawyers LLPlexcor.caHQ: London, ON, CanadaReported employees: 1-10 | London, ON, Canada | 1-10 | Exact match | 7 contacts → |
“At Lexcor Business Lawyers LLP, our trade-mark is Strictly Business® - which simply means that our practice is restricted to business law - providing first class legal advice to…” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Spero LAWsperolaw.ca HQ: London, ON, CanadaReported employees: 11-50 | London, ON, Canada | 11-50 | Exact match | 6 contacts → |
“We believe that strength of a law firm does not rest in the number of lawyers within the firm, but in the commitment of each lawyer to provide the highest possible degree of…” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Amin LAW Professional Corporationdavidaminlaw.com HQ: London, ON, CanadaReported employees: 1-10 | London, ON, Canada | 1-10 | Exact match | 6 contacts → |
“Whether you’re involved in the criminal justice system, looking to buy/sell a home, or just plan for the future, we offer wise guidance and support that will save you time, energy…” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Belecky & Beleckybelecky.ca HQ: London, ON, CanadaReported employees: 1-10 | London, ON, Canada | 1-10 | Exact match | 3 contacts → |
“Belecky & Belecky is a full-service general practice law firm which has provided legal services to London and South-Western Ontario for over 40 years.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Chinneck LAW Professional Corporationchinneck.ca HQ: London, ON, CanadaReported employees: 11-50 | London, ON, Canada | 11-50 | Exact match | 2 contacts → |
“Chinneck Law Professional Corporation is a Law Firm located at 37 Ridout St S, LONDON, Ontario, Canada.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Menear Worrad & Associatesmenearlaw.com HQ: London, ON, CanadaReported employees: 1-10 | London, ON, Canada | 1-10 | Exact match | 2 contacts → |
“Menear Worrad & Associates has been Specializing in Service for over 40 years.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Macdonald Evendenmacdonaldevenden.ca HQ: London, ON, CanadaReported employees: 1-10 | London, ON, Canada | 1-10 | Exact match | 1 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 19 | Jbrennan LAWjbrennanlaw.ca HQ: London, ON, CanadaReported employees: 1-10 | London, ON, Canada | 1-10 | Exact match | 1 contacts → |
“As a dedicated legal practitioner, I specialize in a diverse range of areas including commercial litigation, shareholder/partnership disputes, liquor license regulatory defense…” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Jeff Conway LAWjeffconwaylaw.com HQ: London, ON, CanadaReported employees: 1-10 | London, ON, Canada | 1-10 | Exact match | 1 contacts → |
“Operating as a small firm in London, Ontario, Jeff Conway Law creates a personable, attentive and client-oriented environment.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 20 of 25 company matches
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Big 5 law firms: dataset insights
September 23, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
25 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole Canada list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 25 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 23, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Big 5 law firms by metro in Canada
Questions about this company list
What does Exact match mean for big 5 law firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many big 5 law firms did RevenueBase find based in London, Canada?
The saved snapshot records 25 matching company records, 1,248 tracked contacts and 840 verified emails. The public preview displays 20 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 23, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Big 5 law firms by geography
- Big 5 law firms based in Brazil
- Big 5 law firms based in the United States
- Big 5 law firms based in France
- Big 5 law firms based in the United Kingdom
- Big 5 law firms based in Germany
- Big 5 law firms based in Italy
- Big 5 law firms based in South Africa
- Big 5 law firms based in Spain
- Big 5 law firms based in Canada
- Big 5 law firms based in Switzerland
- Big 5 law firms based in Belgium
- Big 5 law firms based in Mexico
Cite this list
RevenueBase Data Team. Top 20 big 5 law firms based in London, Canada. Snapshot: September 23, 2026. https://revenuebase.ai/companies/big-5-law-firms/canada/london.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
Company intelligence · public preview
Top 20 big 5 law firms based in London, Canada
RevenueBase records 25 matching company records for big 5 law firms based in London, Canada, with 1,248 tracked contacts and 840 verified work emails.
This public preview shows 20 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 23, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 20 big 5 law firms based in London, Canada
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Lerners LLPlerners.ca HQ: London, ON, CanadaReported employees: 201-500 | London, ON, Canada | 201-500 | Exact match | 450 contacts → |
“Lerners LLP is a full service law firm that has grown to become one of Ontario’s largest firms.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Siskinds LLPsiskinds.com HQ: London, ON, CanadaReported employees: 51-200 | London, ON, Canada | 51-200 | Exact match | 271 contacts → |
“Siskinds is one of Southwestern Ontario’s leading law firms.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Harrison Pensa LLPharrisonpensa.com HQ: London, ON, CanadaReported employees: 51-200 | London, ON, Canada | 51-200 | Exact match | 176 contacts → |
“Harrison Pensa LLP is a full-service law firm with expertise in litigation, business law and real estate, and a strong focus in family, wills and estate, and personal injury law.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Mckenzie Lake Lawyers LLPmckenzielake.com HQ: London, ON, CanadaReported employees: 51-200 | London, ON, Canada | 51-200 | Exact match | 130 contacts → |
“McKenzie Lake is a full-service law firm with offices in Guelph, London and Strathroy, Ontario.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Cohen Highley LLPcohenhighley.com HQ: London, ON, CanadaReported employees: 51-200 | London, ON, Canada | 51-200 | Exact match | 104 contacts → |
“Founded in London ON in 1974, Cohen Highley, opened its sixth branch office in Windsor ON in 2023.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Scott Petrie LLP LAW Firmscottpetrie.com HQ: London, ON, CanadaReported employees: 1-10 | London, ON, Canada | 1-10 | Exact match | 18 contacts → |
“The business model for Scott Petrie LLP Law Firm, from the outset, has been the direct delivery of competent legal services by lawyers and staff working within specific areas of…” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Dyer Brown LLPdyerbrownlaw.com HQ: London, ON, CanadaReported employees: 11-50 | London, ON, Canada | 11-50 | Exact match | 17 contacts → |
“Dyer Brown LLP is a company based out of 495 Richmond St, London, Ontario, Canada.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Drake LAWdrakelaw.ca HQ: London, ON, CanadaReported employees: 11-50 | London, ON, Canada | 11-50 | Exact match | 12 contacts → |
“At Drake Law, we pride ourselves on delivering exceptional legal services and innovative solutions that exceed expectations.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Wallace Smith Lawyerswallacesmith.ca HQ: London, ON, CanadaReported employees: 11-50 | London, ON, Canada | 11-50 | Exact match | 11 contacts → |
“Wallace Smith Lawyers is a boutique law firm based in the heart of London, Ontario, offering specialized services in civil litigation with a focus on personal injury, insurance…” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Advocates LLPadvocatesllp.com HQ: London, ON, CanadaReported employees: 1-10 | London, ON, Canada | 1-10 | Exact match | 10 contacts → |
“Started in 1996, the litigation law firm of Advocates LLP has been a pioneer in the use of integrated computer technology and its application in the practice of law.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Hassan LAWhassanlaw.com HQ: London, ON, CanadaReported employees: 11-50 | London, ON, Canada | 11-50 | Exact match | 8 contacts → |
“Many people go through their entire lives without contacting a lawyer or law firm.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Lexcor Business Lawyers LLPlexcor.ca HQ: London, ON, CanadaReported employees: 1-10 | London, ON, Canada | 1-10 | Exact match | 7 contacts → |
“At Lexcor Business Lawyers LLP, our trade-mark is Strictly Business® - which simply means that our practice is restricted to business law - providing first class legal advice to…” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Spero LAWsperolaw.ca HQ: London, ON, CanadaReported employees: 11-50 | London, ON, Canada | 11-50 | Exact match | 6 contacts → |
“We believe that strength of a law firm does not rest in the number of lawyers within the firm, but in the commitment of each lawyer to provide the highest possible degree of…” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Amin LAW Professional Corporationdavidaminlaw.com HQ: London, ON, CanadaReported employees: 1-10 | London, ON, Canada | 1-10 | Exact match | 6 contacts → |
“Whether you’re involved in the criminal justice system, looking to buy/sell a home, or just plan for the future, we offer wise guidance and support that will save you time, energy…” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Belecky & Beleckybelecky.ca HQ: London, ON, CanadaReported employees: 1-10 | London, ON, Canada | 1-10 | Exact match | 3 contacts → |
“Belecky & Belecky is a full-service general practice law firm which has provided legal services to London and South-Western Ontario for over 40 years.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Chinneck LAW Professional Corporationchinneck.ca HQ: London, ON, CanadaReported employees: 11-50 | London, ON, Canada | 11-50 | Exact match | 2 contacts → |
“Chinneck Law Professional Corporation is a Law Firm located at 37 Ridout St S, LONDON, Ontario, Canada.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Menear Worrad & Associatesmenearlaw.com HQ: London, ON, CanadaReported employees: 1-10 | London, ON, Canada | 1-10 | Exact match | 2 contacts → |
“Menear Worrad & Associates has been Specializing in Service for over 40 years.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Macdonald Evendenmacdonaldevenden.ca HQ: London, ON, CanadaReported employees: 1-10 | London, ON, Canada | 1-10 | Exact match | 1 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 19 | Jbrennan LAWjbrennanlaw.ca HQ: London, ON, CanadaReported employees: 1-10 | London, ON, Canada | 1-10 | Exact match | 1 contacts → |
“As a dedicated legal practitioner, I specialize in a diverse range of areas including commercial litigation, shareholder/partnership disputes, liquor license regulatory defense…” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Jeff Conway LAWjeffconwaylaw.com HQ: London, ON, CanadaReported employees: 1-10 | London, ON, Canada | 1-10 | Exact match | 1 contacts → |
“Operating as a small firm in London, Ontario, Jeff Conway Law creates a personable, attentive and client-oriented environment.” Recorded description excerpt · September 23, 2026Open company data in RevenueBase ↗Free signup required. | |||||
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Big 5 law firms: dataset insights
September 23, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
25 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole Canada list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 25 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 23, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Big 5 law firms by metro in Canada
Questions about this company list
What does Exact match mean for big 5 law firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many big 5 law firms did RevenueBase find based in London, Canada?
The saved snapshot records 25 matching company records, 1,248 tracked contacts and 840 verified emails. The public preview displays 20 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 23, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 20 big 5 law firms based in London, Canada. Snapshot: September 23, 2026. https://revenuebase.ai/companies/big-5-law-firms/canada/london.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗