Companies catalogue
- H & H Wood Products, Wheatley
- H C & C Contracting, London
- H C & C Contracting, London
- H J Skelton (Canada) Ltd, London
- H.K.Dry Cleaning & Alterations, London
- HCC General Contracting, London
- HDR, Omaha
- HP Filtration/Hoses Plus (Koch Filters), London
- Hach Sales and Service Canada LP, Loveland
- Haines, Jones & Cadbury (HJC) Corporation, London
- Halliday Bruce, London
- Hallmark, London
- Halloween Alley, London
- Halton Recycling Ltd, London
- Hamilton Farmers' Market, Hamilton
- Hamisco Industrial Sales Inc, London
- Hamstra Carpet One, Strathroy
- Hangar9, London
- Hansen's Electric Motor Service, Midland
- Hanwha QCELLS Canada, London
- Happy Dry Cleaners, London
- Harasym Developments (Mike Harasym), London
- HardCore Electronic Supply, London
- Hardie Industrial Services, London
- Harding Drywall Ltd, London
- Hardware Services, Thorndale
- Hardware Solutions, London
- Harring Doors, London
- Harris Gord Construction Ltd, London
- Harris Steel Group Ltd, London
- Hart Stores | Magasins Hart, London
- Hasbeans, London
- Hassan Law, London
- Hastings & Aziz Limited, London
- Hasty Market, Hamilton
- Hasty Market, London
- Hasty Market, London
- Hasty Market - 24Hrs, London
- Hatashita International / DojoBuy, Waterloo
- Hatherell Construction, London
- Havana Castle Cigars, London
- Haven's Creamery, London
- Hawes Drums, London
- Hawkrigg S Backhoe Services, Ailsa Craig
- Hayden Water Wells, Lucan
- Hayman Construction Inc, London
- Hayman Construction Inc, London
- Healthy Creations, Windsor
- Hearn's Ice Cream, Saint Marys
- Heaters Controls & Sensors, London
- Heather Rapiti Massage Therapy (Healthy Living Massage & Wellness Centre), Hamilton
- Heaven Scent body & soul therapies, London
- Hedley Bennett, London
- Helix Courier Limited, London
- HellaCreative Solutions, Kitchener
- Henkel Diversified Inc, London
- Henry Schein Canada, London
- Henry's - London South, London
- Herbalife, London
- Heritage Renovations, London
- Hertz, Barrie
- Hertz, London
- Hertz, London
- Hertz, London
- Hess Millwork, Hamilton
- Hewitt Material Handling, London
- Hewitt Material Handling Inc, Kitchener
- Hey Cupcake!, London
- Hi Convenience, London
- Hi-Tech Controls (London), London
- Hi-Times (Head Shop+Hydroponic Shop), London
- Hi-Ya Mini-Mart, London
- Highbury Ford Sales, London
- Highbury Mini Mart, London
- Himalaya Group Inc | Roofing & General Contractor London Ontario, London
- Hip Fashion, London
- Hodgins Automotive, London
- Hoffer Mechanical Co Ltd, Hamilton
- Holland Cleaning Solutions, London
- Holland Tailor Alterations & dry cleaner, London
- Hollandia Pools & Spas, London
- Holler Electric, London
- Holstead & Redmond Limited, London
- Holt Counselling and Consulting Services, London
- Home & Garden RONA, London
- Home Accents, London
- Home DayCare, Saint Thomas
- Home Depot Cleaning Services - Steam Dry Canada - London, London
- Hose Headquarters Ltd., London
- Household Plumbing, London
- Hudson Doors Plus, London
- Hurex LTD, Delaware
- Hurley Corporation, London
- Huron Pharmasave, London
- Husky Detailing Inc, London
- Hutton House, London
- Hy-Cor International Inc, Komoka
- Hyde Park Computers, London
- Hydro One Networks Inc, Melbourne
- Hydro One substation, Centralia