| # | Company | Employees |
|---|---|---|
| 1 |
Western Universityuwo.ca
A leading research-intensive university with a global community of students and alumni focused on making change in the world Welcome scholars worldwide |
12,137 |
| 2 |
London Health Sciences Centre (LHSC)lhsc.on.ca
Acute care teaching hospital offering specialized clinical services, leading in discovery and innovation, providing exceptional patient care and training healthcare professionals |
7,092 |
| 3 |
EllisDonellisdon.com
An employee-owned construction company providing comprehensive services in capital projects, facilities management, and sustainable buildings, leading innovation in the construction sector |
5,767 |
| 4 |
GoodLife Fitnessgoodlifefitness.com
The largest fitness provider in Canada and fourth largest globally, with a strong emphasis on member care, personal wellness, and team motivation |
5,525 |
| 5 |
Fanshawe Collegefanshawec.ca
A large college in Ontario offering diploma, degree, certificate, and apprenticeship programs to over 43,000 students annually from 50 countries |
4,454 |
| 6 |
City of London, Canadalondon.ca
A large team of over 3000 employees in London delivering 100+ services, working together to build a better city for all |
1,749 |
| 7 |
St. Joseph's Health Care Londonsjhc.london.on.ca
A leading academic health care organization in Canada providing compassionate care, teaching, and research to help people live life fully |
1,707 |
| 8 |
Emco Corporation: Plumbing, HVAC, Waterworks, Industrial, Irrigation, Fire Protectionemco.ca
Leading Canada-based plumbing wholesale company offering products and services in plumbing, HVAC, waterworks, industrial, irrigation, fire protection, and oilfield supply Focus on customer satisfaction and employee development |
1,695 |
| 9 |
London District Catholic School Boardldcsb.ca
The London District Catholic school system educates over 26,000 students from elementary to secondary levels, supported by a large staff and adult education options |
1,621 |
| 10 |
Oxford Learning Centres Inc.oxfordlearning.com
The company focuses on active learning and critical thinking in academic programs to help students understand the material and its importance in life |
1,174 |
| 11 |
Ivey Business School at Western Universityivey.uwo.ca
A business school specializing in leadership development with experiential learning, offering undergraduate, postgraduate, and executive programs affiliated with a university |
965 |
| 12 |
Voicesvoices.com
A voice marketplace connecting businesses with voice actors for hire and payment, bypassing the need for talent agents |
964 |
| 13 |
Trojan Technologiestrojantechnologies.com
The company provides innovative technologies to help customers meet water quality objectives, reduce costs, and improve environmental stewardship globally |
796 |
| 14 |
Libro Credit Unionlibro.ca
A full-service financial institution focused on serving over 113,000 member-Owners through digital services and physical locations, with a commitment to social and environmental impact |
737 |
| 15 |
Alimentivalimentiv.com
A company specializing in clinical trials, medical imaging, and precision medicine for gastrointestinal disorders, with a history dating back to 1986 |
663 |
| 16 |
Schulich School of Medicine & Dentistryschulich.uwo.ca
The company delivers exceptional education, conducts impactful research, and collaborates with communities to enhance health and well-being for the future |
655 |
| 17 |
General Dynamics Land SystemsโCanadagdlscanada.com
Global leader in providing innovative land and amphibious combat vehicle solutions through cutting-edge technologies in machining, electronics, software development, and systems integration |
576 |
| 18 |
Digital Extremesdigitalextremes.com
A leading independent video game development studio known for creating popular titles such as Warframe and upcoming projects like Soulframe |
560 |
| 19 |
Assistance Services Groupassistanceservicesgroup.com
A provider of various assistance services including Roadside Assistance, Legal Assistance, Business Support Services, and Telehealth solutions |
549 |
| 20 |
StarTech.comstartech.com
Manufacturing and supplying IT connectivity accessories supporting over 200 technologies, focused on simplifying IT professionals' work globally. |
538 |
| 21 |
King's University Collegekings.uwo.ca
A liberal arts university college rooted in the Catholic intellectual tradition, offering personalized education, emphasizing social justice, and promoting diversity and inclusivity |
532 |
| 22 |
Executive Aviationexecutiveaviation.ca
Provider of FBO and Commercial Ground Services, prioritizing safety and customer service for private aviators, executive travelers, crew, and commercial airlines |
475 |
| 23 |
Lerners LLPlerners.ca
Law firm with over 100 lawyers offering expertise in various practice areas, known for handling complex cases, creating new law, and delivering positive outcomes for clients |
464 |
| 24 |
Huron Universityhuronu.ca
A unique Liberal Arts university fostering ethical leadership, community engagement, and academic achievement, providing elite education with a focus on inclusive leadership development |
416 |
| 25 |
Fit4Less Canadafit4less.ca
Affordable fitness provider in Canada with judgment-free clubs across multiple provinces, offering training, healthcare plans, and a free membership |
390 |
| 26 |
WINMARยฎ Property Restoration Specialists - Corporatewinmar.ca
Leading Canadian property restoration company offering services for flood, fire, wind, mould, sewer, vehicle impact, and board-up with 24/7 emergency services for insurance industry and clients |
350 |
| 27 |
Let's Talk Science | Parlons sciencesletstalkscience.ca
A national charitable organization providing STEM programs to empower Canadian youth, educators, and volunteers, fostering skills for success in an evolving world |
333 |
| 28 |
MTCmanningtrainingconsulting.com
Company specializing in creating customized training programs in IT, telecommunications, customer service, and HR Also offers project management services including controls and testing |
312 |
| 29 |
London Hydrolondonhydro.com
Manages distribution and utilization of electricity in London, Ontario, receiving power from high-voltage transmission grid and overseeing design, construction, and maintenance of facilities |
309 |
| 30 |
JMP Solutions, a CONVERGIX Automation companyjmpsolutions.com
Industrial technology partner providing engineering services and turnkey solutions in process automation, control systems, information systems, robotics, AGVs, and networking/security applications with exceptional customer satisfaction and proven project execution methodologies |
290 |
| 31 |
London Children's Connectionlcc.on.ca
Non-profit organization providing high quality child care programs and services in London area, supporting children, families, and building caring communities |
285 |
| 32 |
Jones Healthcare Groupjoneshealthcaregroup.com
A leading provider of innovative packaging and medication dispensing solutions for global healthcare sectors, with a strong reputation for quality and partnerships |
255 |
| 33 |
Robarts Research Instituterobarts.ca
A leading non-profit medical research institute focused on investigating debilitating diseases through advanced medical imaging and interdisciplinary research collaborations |
233 |
| 34 |
Trudell Medical Internationaltrudellmed.com
Specializing in high-quality aerosol drug delivery devices for respiratory conditions, we provide innovative solutions to improve patient outcomes and reduce healthcare costs |
223 |
| 35 |
VersaBankversabank.com
A Canadian digital bank utilizing an electronic branchless model to offer deposits, loans, leases, and mortgages sourced electronically and through brokers |
207 |
| 36 |
Transdev Ontario Manitobavoyago.ca
Leading Canadian passenger mobility service offering transportation solutions including medical, school busing, charters, and public transit with a focus on safety and innovation |
183 |
| 37 |
Harrison Pensa LLPharrisonpensa.com
A full-service law firm based in London, Ontario, specializing in litigation, business law, real estate, family, wills and estates, and personal injury law |
181 |
| 38 |
Security Guard Group Limitedsecurityguardgroup.ca
Private security services agency specializing in risk assessment and security guard solutions Client and employee-oriented culture with collective 37 years of industry experience |
180 |
| 39 |
McFarlan Rowlands Insurance Brokers Incmcfarlanrowlands.com
Established in 1896 with a recent merge, this insurance brokerage prioritizes clients with 17 offices across Southwestern Ontario, offering personalized service and unique coverages |
176 |
| 40 |
Paystonepaystone.com
Payment, loyalty, gift card, and customer engagement solutions provider used by 25,000+ businesses in North America for seamless customer interactions |
175 |
| 41 |
Almond Careers - Training, Consultingalmondcareers.com
Almond Careers provides practical work experience and training in project management, helping individuals secure jobs and companies deliver projects affordably and effectively |
174 |
| 42 |
Nerds On Sitenerdsonsite.com
Passionate tech partner focused on maximizing computer technology to enhance profitability and enjoyment, aiming to become the PowerBrand of choice |
173 |
| 43 |
Blackburn Media Incblackburnmedia.ca
A family-owned broadcasting company with 14 radio stations in Southwestern and Midwestern Ontario, offering a variety of music genres to its listeners |
171 |
| 44 |
Stillman Translationsstillmantranslations.com
A cutting-edge multilingual communications provider using technology and experienced linguists to break down language barriers and enhance global communication |
168 |
| 45 |
ProResp Inc.proresp.com
Specializing in respiratory care, CPAP, and oxygen therapy Providing high quality, client-centered services to improve quality of life for individuals with respiratory illnesses |
166 |
| 46 |
Shelby's Canadashelbys.ca
A fast casual shawarma chain from London, Ontario, reinventing shawarma with fresh, flavorful menu items to spread happiness in communities |
166 |
| 47 |
INPS - International Name Plate Supplies, Ltd.inps.net
A versatile manufacturer providing full-scale component acquisition and design services across multiple industries, integrating seamlessly into clients' operations |
165 |
| 48 |
London Health Sciences Foundationsprout.link
London Health Sciences Foundation supports patient care choices made by individuals, facilitating impactful differences in healthcare at @lhsccanada |
165 |
| 49 |
Seedseedcreative.ca
A leading total creative services provider, delivering effective advertising and marketing solutions with a track record of successful problem-solving |
163 |
| 50 |
Sutton Group - Select Realty Inc., Brokeragesuttonselect.com
A reputable Canadian real estate organization with dedicated REALTORSยฎ providing personalized service for buying and selling residential, commercial, and recreational properties |
162 |
| 51 |
Century 21 First Canadian Corp., Brokeragec21.ca
A leading real estate office in London, Ontario, with over 235 Realtors who specialize in selling residential, investment, commercial, and farm properties |
162 |
| 52 |
The London Cross Cultural Learner Centrelcclc.org
A community organization providing settlement services, diversity training, job search workshops, interpreter services, and support for newcomers and refugees |
161 |
| 53 | 159 | |
| 54 |
Northernnorthern.co
Specializing in digital solutions for Retail and Public Service industries, we design tailored digital experiences to drive business success |
158 |
| 55 |
Vorwerk UK and Irelandvorwerk.com
An international brand focused on transforming everyday home care with products like Thermomix and Kobold in the UK and Ireland |
153 |
| 56 | 152 | |
| 57 |
Kingโs University College at the University of Western Ontariokings.uwo.ca
An affiliated Catholic institution offering degree programs in liberal arts, social sciences, and social work, along with master's degrees Renowned for teaching excellence |
148 |
| 58 |
London Police Servicelondonpolice.ca
A company dedicated to ensuring safety in the community by forming partnerships and upholding professionalism and accountability at the highest level |
146 |
| 59 |
Selectpath Benefits & Financial Inc.selectpath.ca
This company offers comprehensive solutions for financial planning, benefits & pension, commercial insurance, HR management, and HRIS & payroll services |
107 |
| 60 |
PRIVITprivit.com
Cutting-edge mobile technology for student athletics stakeholders to safely monitor athletes' health info, promoting safety, compliance, and easy access to accurate data Visit wwwPRIVITcom |
81 |
| 61 |
Scholar's Choicescholarschoice.ca
A leading retailer in Canada providing educational toys and teaching materials to support children's learning and development since 1939 |
77 |
| 62 |
Anova: A Future Without Violenceanovafuture.org
Anova provides support, shelter, counseling, and resources to survivors of gender-based violence, striving to eliminate patriarchal patterns and create a world without violence |
70 |
| 63 |
FCFPclassicfls.com
Specializes in fire protection services and life safety solutions through a partnership with FCFP, now operating under the name Classic Fire + Life Safety |
66 |
| 64 |
THINQ Technologies Ltd. | DirectDial.comdirectdial.com
A leading provider of IT technology solutions to businesses, offering a wide range of hardware and software products, expert consultation, and extensive service coverage |
56 |
| 65 |
Travel Trade Recruitmenttraveltradejobs.com
A specialist recruitment agency for the travel industry in UK and Australia, offering permanent, temporary & executive job opportunities globally with award-winning service |
55 |
| 66 |
Mercedes-Benz Londonmblondon.com
A company passionate about providing unparalleled quality, service, and commitment to preserving luxury vehicles while giving back to the community |
51 |
| 67 |
Tempur-Pedic Canadatempurpedic.ca
This company specializes in engineering mattresses with TEMPUR material to provide body-conforming support, eliminate pressure points, and promote restful sleep |
51 |
| 68 |
interValinter-val.ai
interVal provides a technology platform for financial institutions to offer real-time valuation data to help business owners make informed decisions |
37 |
| 69 |
Tactic Studiostacticstudios.com
Game development studio based in London, Canada, specializing in PC games with engaging stories Released Immortal Empire and Claire de Lune using proprietary Immortal Engine |
37 |
| 70 |
Sle-Co Plasticssleco.com
A TS 16949 Tier II automotive parts supplier with 29 years of experience specializing in injection molded components and assemblies for OEM markets |
33 |
| 71 |
NAL Insurance Inc.nalinsurance.com
A leading provider of alternative coverage for trucking industry workers, offering innovative programs and resources for healthier lifestyles on the road |
32 |
| 72 |
London Kialondonkia.com
A company located in London, Ontario, specializing in an unspecified field at the address 764 Wharncliffe Road South, N3S 0B6 |
25 |
| 73 |
Thames Glass Limitedthamesglass.ca
A provider of innovative glass and glazing solutions in Southwestern Ontario since 1966, working on design-build projects with architects and contractors |
20 |
| 74 |
Elemex Architectural Facade Systemselemex.com
Providing innovative panel systems solutions for limitless architectural applications, specializing in custom cladding materials with proprietary attachment technology for superior design flexibility and quality |
19 |
| 75 |
Zavitz Insurance & Wealth, A Hub International Companyzavitzinsurance.com
The company provides insurance, group benefits, and wealth management services to protect and invest in the lives of individuals, families, and businesses |
19 |
| 76 |
MLD Solutions Inc.mldsolutions.com
MLD Solutions Inc offers software development, CRM software, and training services/products, with a focus on innovative solutions for business problems |
19 |
| 77 |
North American Brandsnorthamericanbrands.com
Third-party logistics provider offering eCommerce, B2B, retail fulfillment, inventory management, customs brokerage, and financial services from London, Ontario. |
15 |
| 78 |
Founderyfoundery.ca
A digital marketing agency in London specializing in SEO, SEM, content marketing, and website development to help businesses grow online |
15 |
| 79 |
Ketolibriyumketolibriyum.ca
A fast-growing business based in Ontario and Quebec specializing in fresh, low-carb and ketogenic meals, desserts, and snacks for a healthy eating lifestyle |
14 |
| 80 |
Highstreet Asset Managementhighstreet.ca
Investment management firm offering diverse pooled funds for high-net-worth individuals, families, foundations, and endowments, utilizing a holistic approach and disciplined investment management strategies |
13 |
| 81 |
External Logisticsexternallogistics.com
Canadian company specializing in last-mile delivery services in GTA and Southwestern Ontario, focusing on innovation, efficiency, and customer satisfaction. |
13 |
| 82 |
Wufwufwufwuf.co.uk
A subscription-based e-commerce for dog owners in the UK, providing surprise packages of treats, toys, chews, accessories, and grooming products monthly |
12 |
| 83 |
Platinum Wealth Management Inc.
Financial services company based in London, Ontario, Canada, specializing in wealth management and financial planning for clients |
11 |
| 84 |
HCP PUMPS INTERNATIONALhcppumpsintl.com
A pump manufacturer with over 40 years of experience, offering a wide range of products and services to over 60 countries worldwide |
10 |
| 85 |
๐ช๐ผ๐ฟ๐น๐ฑ๐๐ผ๐ป๐ป๐ฒ๐ฐ๐ ๐๐ฟ๐ฎ๐ป๐ฑ๐worldconnectbrands.com
The company assists businesses in the fashion, accessories, manufacturing, and Import/Export industry through strategic partner selection and comprehensive consultation for business growth and development |
10 |
| 86 |
Helix Courier Limitedhelixcourier.com
Provides local messenger services in London and overnight inter-city courier services across North America, ensuring timely delivery of parcels. |
9 |
| 87 |
WCS Financial Serviceswcsfinancial.com
A full service insurance MGA offering term, permanent, critical illness, disability, long term care, and investment products from over 15 companies |
9 |
| 88 |
Mustang Capital
A student-led investment group managing a fund, focusing on various strategies and asset classes, providing training programs for finance newcomers |
8 |
| 89 |
ESAC Electrical & Systems Advanced Control Inc.esac.com
Specializing in electrical power engineering and integrated solutions for utilities, institutions, and industries, focusing on green energy and future growth |
8 |
| 90 |
Titan Firm Inc.titanfirm.com
The company focuses on building with transparent communication, innovation, and incentivizing employees to create rewarding and challenging opportunities |
8 |
| 91 |
Robert Q Airbus
The company provides courier services, helping businesses and individuals deliver packages efficiently and securely to their intended destinations |
8 |
| 92 |
Filthy Rebena Vintagefilthyrebena.com
A vintage clothing store in Canada that sells trend-based clothing, footwear, accessories, and housewares while focusing on sustainable practices and promoting the reuse of clothing |
7 |
| 93 |
Fire Roasted Coffee Co.fireroastedcoffee.com
Specialty coffee roaster in London, focusing on ethically and sustainably sourced beans for consistent and high-quality brews sold through various retail partners |
7 |
| 94 |
Jockey Canada Company Limitedjockeyp2p.ca
Shop online for a wide variety of underwear, t-shirts, bras, and panties for men and women, including exclusive styles and a large selection of sizes and colors |
6 |
| 95 |
Visitor Queueleadinfo.com
Software providing sales teams with detailed insights on website visitors and personalized website experiences to generate qualified B2B leads. |
5 |
| 96 |
Stevenson and Hunt, o/a Arthur J. Gallagher Canada Limited
A leading insurance and risk management company offering commercial, personal, and benefits services, with a focus on exceptional client service and long-lasting relationships |
4 |
| 97 |
Express Plusexpresspluss.com
A newly formed courier company in London, Ontario, focusing on top quality service, corporate social responsibility, innovation, and environmentally friendly practices in logistics |
3 |
| 98 |
Vision Gate Solutionsvisiongatesolutions.com
Specializing in agile strategy and technology consulting, the company focuses on strategy implementation and management for businesses |
2 |
| 99 |
INVINCI INCinvinci.ca
Specializing in leveraging AI and ML technologies to enhance content quality and develop innovative products for improving data sets accuracy |
2 |
Turn this list into pipeline
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 24, 2026.
The same list elsewhere in Canada
- The largest companies in Canada 9,391
- The largest companies in Ontario 4,330
- The largest companies in the province of Quebec 1,985
- The largest companies in British Columbia 1,162
- The largest companies in Alberta 1,133
- The largest companies in Manitoba 215
- The largest companies in Nova Scotia 135
- The largest companies in Saskatchewan 120
- The largest companies in New Brunswick 97
- The largest companies in Toronto 1,663
- The largest companies in Montreal 856
- The largest companies in Calgary 601
- The largest companies in Vancouver 511
- The largest companies in Mississauga 438
- The largest companies in Ottawa 314
- The largest companies in Edmonton 226
- The largest companies in Quebec City 212
- The largest companies in Winnipeg 174
- The largest companies in Markham 141
- The largest companies in Brampton 119
- The largest companies in Burnaby 99
- The largest companies in Oakville 97
- The largest companies in Vaughan 90
- The largest companies in Surrey 89