| Kent House Freehold Association Ltd. | Households | 2003 |
| Kenton House Consulting Limited | Information & communication | 2017 |
| Kerala Coffee House Ltd | Hospitality | 2025 |
| Kerb Appeal Services Limited | Households | 2020 |
| Kerik Ltd | Administrative & support | 2023 |
| Kerley Court Management Co Limited | Real estate | 1991 |
| Keros Management Services Limited | Extraterritorial | 2018 |
| Kerry Nicholls Dance CIC | Education | 2016 |
| Ketchell Limited | Information & communication | 2001 |
| Keto Holdings Limited | Financial services | 2024 |
| Keto Limited | Wholesale & retail | 2002 |
| Keto Protein Company Ltd | Manufacturing | 2025 |
| Keverstone Court Freehold Limited | Households | 1996 |
| Kevin Bassett Property Co. Ltd | Real estate | 2014 |
| Kevin J Fournier Intellectual Property Legal Services Limited | Professional & scientific | 2021 |
| KEW Partners Limited | Professional & scientific | 2001 |
| Key Cars Trading Limited | Wholesale & retail | 2009 |
| Key Drummond Lettings Limited | Real estate | 2023 |
| Key IP Limited | Financial services | 2000 |
| Key Media Marketing Ltd | Information & communication | 2019 |
| Key to Hearing Limited | Health & social care | 2012 |
| Key to Mortgages Limited | Financial services | 2021 |
| KEY2ONE Limited | Real estate | 2017 |
| Keyfort Limited | Information & communication | 2025 |
| Keyhole Design Ltd | Wholesale & retail | 2021 |
| Keyhole Holdings Limited | Real estate | 2025 |
| Keysearchai Ltd | Professional & scientific | 2026 |
| Keystone Commercial Assets Ltd | Real estate | 2026 |
| Keystone Electronics Holdings Limited | Financial services | 2019 |
| Keystone Electronics Limited | Wholesale & retail | 2011 |
| Keystone Holdings (South) Ltd | Financial services | 2018 |
| Keystone Homes (South) Ltd | Extraterritorial | 2018 |
| Keystone Investment Portfolio Limited | Professional & scientific | 2021 |
| Keystone Plant Hire Ltd | Administrative & support | 2018 |
| Keyworker Properties Limited | Real estate | 2001 |
| Kezan Medics Limited | Health & social care | 2011 |
| KH Bournemouth Limited | Hospitality | 2020 |
| KH Services Ltd | Administrative & support | 2022 |
| KHALIFA67 Limited | Hospitality | 2023 |
| Khalima Ltd | Hospitality | 2014 |
| Khayal Studio Ltd | Real estate | 2022 |
| Khejiegoldjeweler Ltd | Wholesale & retail | 2026 |
| KHJ2 Ltd | Manufacturing | 2023 |
| KHL Holdco Limited | Financial services | 2025 |
| KHM Marketing Ltd | Construction | 2018 |
| KI Consultant Limited | Information & communication | 2017 |
| Ki-Cchin Sushi Bar Ltd | Hospitality | 2019 |
| Kickr Ltd | Administrative & support | 2020 |
| KID N Play Store Limited | Wholesale & retail | 2024 |
| Kids Play Cafe Charminster Ltd | Hospitality | 2024 |
| Kiesvital Ltd | Wholesale & retail | 2020 |
| Kight Campos Crawford 1956 Ltd | Professional & scientific | 2026 |
| Kikki Couture Limited | Wholesale & retail | 2018 |
| Kilburn Varieties Limited | Professional & scientific | 1942 |
| Killick (Spire) Limited | Health & social care | 2012 |
| Kimbeau Property Management Limited | Households | 2023 |
| Kimberley Garage Limited | Wholesale & retail | 2002 |
| Kimmeridge Capital Limited | Financial services | 2020 |
| Kimono Lettings Limited | Real estate | 2019 |
| Kind & Co. (Holdings) Limited | Construction | 1945 |
| Kind Pilates Ltd | Arts & recreation | 2025 |
| Kinderworld Day Nursery (Holdings) Limited | Professional & scientific | 2013 |
| Kinderworld Day Nursery Limited | Education | 2013 |
| Kindheart Services Limited | Health & social care | 2025 |
| Kindred Spirit Sailing LLP | | 2024 |
| Kineticfilm Ltd | Information & communication | 2012 |
| Kinetiq Home Ltd | Wholesale & retail | 2025 |
| King & Company IFA Limited | Extraterritorial | 2005 |
| King Edward Court (Bournemouth) Management Company Limited | Households | 1986 |
| King Edward Court (Freehold) Limited | Households | 2004 |
| King Property Rental & Maintenance Limited | Real estate | 2015 |
| Kingborne Developments Limited | Real estate | 2025 |
| Kingdom Collectables Limited | Wholesale & retail | 2026 |
| Kingdom Life | Other services | 2007 |
| Kingdom Medical Ltd | Health & social care | 2021 |
| Kingdom Sounds Limited | Information & communication | 2025 |
| Kingdom Windows South Ltd | Construction | 2017 |
| Kingfisher Aerospace Ltd | Professional & scientific | 2025 |
| Kingfisher Court Management Bournemouth Limited | Households | 1987 |
| Kingren Groundworks Limited | Construction | 2003 |
| Kings Close Poole Limited | Households | 2003 |
| Kings Court (Saxonbury Road) Limited | Households | 2008 |
| Kings Estates Limited | Real estate | 2018 |
| Kingsbridge Court Management (in Dorset) Ltd | Households | 2009 |
| Kingsbury Partnership Limited | Construction | 2005 |
| Kingsbury Projects Limited | Construction | 2016 |
| Kingsdene Management Company(Bournemouth)Limited | Real estate | 1967 |
| Kingsdown Energetics Ltd | Manufacturing | 2025 |
| Kingsdown Homes Limited | Real estate | 2012 |
| Kingsfield House (Management Company) Limited | Households | 2005 |
| Kingsgate Freehold Limited | Households | 1979 |
| Kingsland Court (Canford Cliffs) Management Company Limited | Real estate | 1978 |
| Kingsleigh Primary School | Education | 2015 |
| Kingsley DRY Cleaners Limited | Other services | 2022 |
| Kingsley Villas RTE Limited | Households | 2008 |
| Kingsmead Investments Limited | Real estate | 1960 |
| Kingston Beck Holdings Limited | Hospitality | 2021 |
| Kingston Operating Limited | Wholesale & retail | 2023 |
| Kingsvale Investments Ltd | Extraterritorial | 2022 |
| Kingswood Day Nurseries Limited | Administrative & support | 2007 |