| KAY Elliott EOT Limited | Administrative & support | 2022 |
| Kazza's Ltd | Wholesale & retail | 2020 |
| Kbbis Devon Ltd | Construction | 2019 |
| KC Bio-Health Ltd | Health & social care | 2024 |
| KC Brand Loyalty Ltd | Professional & scientific | 2024 |
| KC TQ1 Management Ltd | Real estate | 2025 |
| Kcreate Limited | Information & communication | 2009 |
| KD Homes Limited | Construction | 2015 |
| KDP Media Ltd | Professional & scientific | 2017 |
| Keep Torquay Prop Co Ltd | Financial services | 2021 |
| KEIZEN9 Group Ltd | Administrative & support | 2023 |
| Kelvin Court Mansions Limited | Households | 2011 |
| Kenilworth Flats Limited | Real estate | 1991 |
| Kenmart Limited | Wholesale & retail | 2002 |
| Kenmart Realty Limited | Financial services | 2017 |
| Kenneth Taylor Limited | Wholesale & retail | 2011 |
| Kentisknowle Management Company Limited | Real estate | 1988 |
| Kents Cavern Limited | Arts & recreation | 1960 |
| Kenyon Court Limited | Households | 1979 |
| Kept Weddings Ltd | Other services | 2020 |
| Kerswell Gardens Farm Ltd | Real estate | 2023 |
| Kestrel Court (MGT) Limited | Households | 2004 |
| Kestrel Sales Ltd | Wholesale & retail | 2023 |
| Kevin Andrews & SON Ltd | Construction | 2010 |
| Kevton Limited | Information & communication | 2013 |
| Key 2 Assets Limited | Information & communication | 2011 |
| Key Tuition Ltd | Education | 2019 |
| Keys & Locks Direct Limited | Wholesale & retail | 2004 |
| KFJ Logistics Ltd | Transport & logistics | 2019 |
| KFS Builders Ltd | Construction | 2011 |
| KH Mobiles Ltd | Wholesale & retail | 2019 |
| Khartoum Place Limited | Real estate | 2021 |
| Kiddy Wholesale Ltd | Wholesale & retail | 2009 |
| Kiki Dahlia Ltd | Arts & recreation | 2025 |
| Kilburn Hall Management Limited | Households | 2004 |
| Kilmorie Limited | Households | 1961 |
| Kiln Commercial Property Limited | Financial services | 2000 |
| Kilverstone Court (Torquay) Limited | Households | 2001 |
| Kilworthy Management Company (Torquay) Limited | Households | 1991 |
| Kimberley Court Management (Torquay) Limited | Households | 2002 |
| Kingdom Reign Ltd | Wholesale & retail | 2024 |
| Kingfisher Cards Ltd | Administrative & support | 2014 |
| Kingsbridge Management Company (Torquay) Limited | Households | 2002 |
| Kingscliffe Property Company Ltd | Construction | 2024 |
| Kingsdale Court (TQ2) RTM Company Limited | Households | 2017 |
| Kingsleigh Manor Management Company Limited | Households | 1989 |
| Kingston Estate (Devon) Limited | Hospitality | 2021 |
| Kingswood Gardening Services TQ Limited | Administrative & support | 2023 |
| Kinlacey Freehold Ltd | Households | 2025 |
| Kitchen Revival SW Limited | Construction | 2019 |
| Kitchen Sisters Ltd | Hospitality | 2018 |
| Kitson Boyce Limited Liability Partnership | | 2009 |
| KJK Concrete Haulage Limited | Transport & logistics | 2019 |
| KK Holdings SW Ltd | Extraterritorial | 2025 |
| KL Business & Build Limited | Construction | 2026 |
| KLS Investments | Financial services | 2013 |
| KM Bern Ltd | Health & social care | 2024 |
| KMB Creative Limited | Arts & recreation | 2024 |
| KMC Recruitment & Consulting Ltd | Administrative & support | 2018 |
| Kmfn Limited | Wholesale & retail | 2019 |
| KMP Assets Ltd | Real estate | 2025 |
| Knebworth Court Management Company Limited | Households | 1982 |
| Knott Another Mortgage Adviser Limited | Financial services | 2003 |
| Kogel & Kogel Limited | Health & social care | 2014 |
| Komplete Design Ltd | Administrative & support | 2017 |
| Komplex Design Limited | Construction | 2019 |
| Koots Salon Limited | Other services | 2017 |
| Kopc International Limited | Professional & scientific | 2025 |
| Kramjar Limited | Wholesale & retail | 2012 |
| Kris Barras Band Limited | Arts & recreation | 2018 |
| Kroon Art Ltd | Arts & recreation | 2018 |
| KSR Building Services Ltd | Construction | 2014 |
| KU Hair Ltd | Other services | 2024 |
| Kudos Fortysix Ltd | Other services | 2018 |
| Kultivi Ltd | Professional & scientific | 2019 |
| Kumiega Holdings Ltd | Other services | 2016 |
| Kumiega Skin Care Clinic Ltd | Other services | 2016 |
| Kurd Fade Cuts Ltd | Other services | 2024 |
| Kurtz Limited | Professional & scientific | 1995 |
| L W Construction Ltd | Construction | 2006 |
| L a Developments (Torbay) Ltd | Real estate | 2015 |
| L a Property Management Limited | Real estate | 2013 |
| L a Renewables Ltd | Construction | 2023 |
| L Hobley Ltd | Construction | 2009 |
| L&A Morgan Ltd | Hospitality | 2024 |
| L.J.C. (SW) Construction Ltd | Construction | 2004 |
| L.O. Coiffure Limited | Administrative & support | 2010 |
| L.P.H. Construction Limited | | 1975 |
| LA Autos Ltd | Wholesale & retail | 2026 |
| LA Bailey D of C Ltd | Hospitality | 2025 |
| LA Bailey D&C Ltd | Hospitality | 2025 |
| LA Bailey Dog & Duck Ltd | Hospitality | 2024 |
| LA Bailey Dolphin Ltd | Hospitality | 2025 |
| LA Bailey Pubs Ltd | Hospitality | 2024 |
| LA Chine Management Company Limited | Households | 2014 |
| LA Maree DE Trouville Limited | Wholesale & retail | 2019 |
| LA Rochelle Management Company (Torquay) Limited | Households | 1987 |
| LA Vieille Ville Limited | Hospitality | 2020 |
| Laburnum Court (Torquay) Limited | Hospitality | 2005 |
| Laburnum House Management Company (Torquay) Limited | Households | 2006 |