Major employers in London
26 employers, 10 of them head offices: 6 worldwide, 4 national and 0 regional. Headcounts are for the site here, with the page that publishes them.
London — the /local page · Who owns London · Who represents London · Companies
Employers26
Worldwide HQ6
National HQ4
Regional HQ0
1
Employers, largest first
People employed at the site in this city where a source publishes it; head offices without a published count follow.
| Company | Here | Employees here | Worldwide HQ | Jobs |
|---|---|---|---|---|
| London Health Sciences CentreHealth care — acute-care teaching hospital | Major site | 15,0002026 | London, Ontario | — |
| Thames Valley District School BoardPublic education — school board | Major site | 14,0002026 | London, Ontario | — |
| St. Joseph's Health Care LondonHealth care — teaching hospital, long-term and mental health care | Major site | 4,8142026 | London, Ontario | — |
| Western UniversityPost-secondary education — research university | Major site | 4,1892025 | London, Ontario | — |
| General Dynamics Land Systems–CanadaDefence manufacturing — armoured vehiclespart of General Dynamics | National HQCanada | 1,7002026 | Reston, Virginia | — |
| Maple Leaf Foods — London PoultryFood processing — poultrypart of Maple Leaf Foods | Major site | 1,7002026 | Mississauga, Ontario | — |
| Trojan TechnologiesManufacturing — UV water treatment equipmentpart of Veralto | Worldwide HQglobal (Trojan Technologies group) | 4502026 | Waltham, Massachusetts | — |
| Kaiser Aluminum CanadaManufacturing — aluminum extrusionspart of Kaiser Aluminum | Major site | 236 | Franklin, Tennessee | — |
| AlimentivContract research — clinical trials, imaging, precision medicine | Worldwide HQglobal | — | London, Ontario | — |
| Digital ExtremesVideo game development | Worldwide HQglobal (studio headquarters) | — | London, Ontario | — |
| GoodLife FitnessFitness clubs | Worldwide HQglobal (Canada-wide club chain) | — | London, Ontario | — |
| Jones Healthcare GroupPharmaceutical packaging — cartons, labels, blister/pouch packaging | Worldwide HQglobal | — | London, Ontario | — |
| Trudell Medical InternationalMedical devices — respiratory/aerosol drug delivery | Worldwide HQglobal | — | London, Ontario | — |
| 3M CanadaManufacturing — diversified industrialpart of 3M | National HQCanada | — | St. Paul, Minnesota | — |
| Diamond Aircraft Industries Inc. (Canada)Aerospace — general aviation aircraft manufacturingpart of Diamond Aircraft Industries | National HQCanada (aircraft manufacturing) | — | Austria | — |
| McCormick CanadaFood manufacturing — spices, seasonings, flavourspart of McCormick & Company | National HQCanada | — | Hunt Valley, Maryland | — |
| Canada LifeInsurance — life, wealth and benefitspart of Great-West Lifeco | Major site | — | Winnipeg, Manitoba | — |
| City of LondonMunicipal government | Major site | — | London, Ontario | — |
| Fanshawe CollegePost-secondary education — college | Major site | — | London, Ontario | — |
| Info-Tech Research GroupIT research and advisory | Major site | — | not established | — |
| Labatt Brewing Company — London breweryBeverage manufacturing — brewerypart of Anheuser-Busch InBev | Major site | — | Leuven, Belgium | — |
| Libro Credit UnionFinancial services — credit union | Major site | — | not established | — |
| London District Catholic School BoardPublic education — Catholic school board | Major site | — | London, Ontario | — |
| London HydroUtilities — electric power distribution | Major site | — | London, Ontario | — |
| Sifton PropertiesReal estate — homebuilding, rentals, commercial | Major site | — | not established | — |
| VoyagoTransportation — student and charter bus, paratransit | Major site | — | not established | — |
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Notes on this record
- LEDC no longer publishes a numbered 'Top Employers' list; its business directory has a 'Largest Employers' view, but the top size band is just '200+ employees' and listings are self-reported (many last updated 2023). Exact headcounts here come from each employer's own site; where none was published, employeesHere is null and the LEDC band is noted.
- Jim's leads: Trojan Technologies is confirmed as headquartered in London (about 450 associates), but its parent is now Veralto (spun out of Danaher in Sept 2023), not Danaher. Canada Life is confirmed: London is one of five main offices, and the former London Life head office is there; group HQ is Winnipeg. 3M Canada's London address comes from LEDC only, because 3M's own Canadian sites refused our User-Agent (3m.ca no response; 3m.com and news.3mcanada.ca robots.txt 403).
- Blocked, recorded and not retried: www.3m.ca (no response), www.3m.com (403), news.3mcanada.ca (403), www.carfax.ca (403), www.cargill.ca and www.cargill.com (403), www.nestle.ca (403), www.voices.com (403), www.gd.com (403), www.startech.com (Cloudflare challenge). So CARFAX Canada (national HQ per LEDC), Cargill's London poultry plant (LEDC self-report: 900 employees), Nestlé Canada London, StarTech.com and Voices.com have no rows, because their own sites could not be opened.
- Also in LEDC's 200+ band in London but not opened or verified this pass: RBC, Scotiabank, TD, Honeywell, Gallagher Canada, Paladin Security, WSIB London, Economical/Definity, GDI, CIBC Mellon, Bill Gosling Outsourcing, Securitas, FCT, Lawson (research arm of LHSC/SJHC), Dillon Consulting, VON, The Original Cakerie, Escalent, Enbridge Gas, Assistance Services Group, Robarts, Canadian Linen, Compass Group, Larlyn, Canusa, London Transit Commission, Canada Post, Trackunit, Lerners, Siskinds, London Public Library, Huron University College, J.D. Power/Autodata, Enercare, Western Fair District, London Free Press, Sodecia, Great Lakes Copper, Bosco & Roxy's, Ethey, Dr. Oetker (London plant), Live Fit Foods, Canadian Pacific, Centennial Windows, Bradken, Campbell Bros, Tyk, BearCom, IBM Canada, Orgill Canada, EllisDon.
- LEDC entries in St. Thomas, Woodstock, Ingersoll, Strathroy, Tillsonburg, Stratford, Dorchester and St. Marys (Magna Formet/Presstran, CAMI, GM Woodstock, Vuteq, Meridian, Vari-Form and others) are left out because they are outside the City of London.
- TVDSB and St. Joseph's counts cover all their sites, some outside the city. Western's figure is full-time only.
- LEDC sector totals (LEDC pages): advanced manufacturing 38,000+ employees in 500 companies; professional services 52,800+; health 25,000+; tech 16,100+; agri-food 7,500+.
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Sources
Prepared 2026-10-23. Each headcount links to the page it is read from; each company to its own site or its /company page.
- London Economic Development Corporation — Business Directory, 'Largest Employers' view · retrieved 2026-10-23Terms: LEDC Terms of Use: 'All of the material provided in this Website is the sole property of the LEDC and cannot be duplicated in whole or in part without the express written permission of the LEDC' — single facts quoted with attribution, no rows reproduced; listings are self-reported and banded (top band '200+ employees')
- LEDC sector pages (Professional Services, Advanced Manufacturing, etc.) · retrieved 2026-10-23Terms: as above
- Company and institution own websites (about/contact/facts pages) · retrieved 2026-10-23Terms: none stated on pages read
- SEC EDGAR submissions records (parent business addresses) and 3M 10-K FY2025 · retrieved 2026-10-23Terms: US government public data