- The Japanese Scissor Company - 12 Tudor Crescent, Enfield, EN2 0TU
- The Jersey Pottery Ltd - 8 Beressord Road, Jersey, Channel Islands, JE1 5JP
- The Jewel Blade Ltd - 442 Penistone Road, Sheffield, South Yorkshire, S6 2FU
- The Jones Tool Company - York House, 198 Barnsley Road, Huddersfield, West Yorkshire, HD8 8TS
- The Jordon Group Ltd - Refrigeration House, Oldham, Greater Manchester, OL9 6QL
- The JPM Group - 126 Rickmansworth Road, Watford, Herts, WD18 7WR
- The Just Slate Company - Selbrae House, Mitchelston Industrial Estate, Kirkcaldy, KY1 3PS
- The K A Wing Group Ltd - 1 Grove Street, Peterborough, Cambridgeshire, PE2 9AG
- The Kaymeet Anodised Ware - Unit 15-16, London, SE16 3LF
- The Kent Scale Company - 55 Sun Lane, Gravesend, Kent, DA12 5HQ
- The Kerry Johns Partnership - Unit 19c , Hilperton, Wiltshire, BA14 6JB
- The Key 2 Growth - Milnwood House, Horsham, West Sussex, RH12 2BT
- The Key Computer Company Ltd - Systems House, Redditch, Worcestershire, B98 9PA
- The Key Consultancy Ltd - The Mount School, Worcestershire, B61 0EP
- The Keyholding Company - Unit 4-6, London, London, SW6 2UZ.
Companies 1936 to 1950 | Page 130 of 295