| Kingswood Paving Ltd | Other services | 2014 |
| Kingwood Property Group Ltd | Construction | 2016 |
| Kinson Masonic Hall Management Company Limited | Real estate | 1997 |
| Kinson Motors Ltd | Wholesale & retail | 2024 |
| Kirby Way Management Limited | Real estate | 2002 |
| Kirk Estates Limited | Real estate | 2014 |
| Kiroj Limited | Manufacturing | 2018 |
| KIS (Southern) Limited | Construction | 2006 |
| KIS Communications Limited | Information & communication | 2005 |
| Kiskis Limited | Real estate | 2023 |
| Kiss ME Cosmetics Limited | Other services | 2020 |
| Kitchen & Lounge Ltd | Hospitality | 2017 |
| Kitchen Elegance Contracts Limited | Manufacturing | 2018 |
| Kitchen Elegance Limited | Wholesale & retail | 1997 |
| Kitchen Hephzibah Limited | Hospitality | 2018 |
| Kitchens First Ltd | Wholesale & retail | 2020 |
| Kitchens Instyle Ltd | Wholesale & retail | 2014 |
| Kits Medical Services Limited | Health & social care | 2014 |
| Kitsune Consulting Limited | Information & communication | 2014 |
| Kivs Property Ltd | Real estate | 2023 |
| Kizito Care Limited | Health & social care | 2023 |
| KJM Roof & Build Ltd | Construction | 2024 |
| Kjmm Ltd | Other services | 2025 |
| Kjnc Percussion Pro Ltd | Wholesale & retail | 2022 |
| KJP (Bournemouth) Limited | Real estate | 2021 |
| KJS Hospitality Limited | Professional & scientific | 2009 |
| KK Advisors Ltd | Extraterritorial | 2005 |
| KK Bullion Limited Partnership | | 2007 |
| KK Bullion Services Ltd | Financial services | 2007 |
| KK F&B Ltd | Hospitality | 2023 |
| KK Ganatra Ltd | Real estate | 2021 |
| KK SAM & Co Limited | Health & social care | 2024 |
| KL & JL Property Ltd | Real estate | 2021 |
| KL Social Limited | Hospitality | 2025 |
| KLA Transport Dorset Ltd | Transport & logistics | 2024 |
| Klear Projects Ltd | Construction | 2025 |
| KLH Catering Ltd | Hospitality | 2015 |
| Klix Tattoo Ltd | Other services | 2025 |
| Klorrpan Express Ltd | Hospitality | 2024 |
| Klub Consultancy Ltd | Education | 2024 |
| Klys Transport Ltd | Transport & logistics | 2024 |
| KMA Construct Ltd | Construction | 2016 |
| KMB Design Limited | Other services | 2014 |
| KMB Property Solutions Limited | Construction | 2019 |
| KMB Trucking UK Ltd | Transport & logistics | 2023 |
| Kmbenning Electrical Services Ltd | Manufacturing | 2025 |
| KME Production Limited | Real estate | 2024 |
| KMH Sales Limited | Wholesale & retail | 2014 |
| KMJ Security Solutions Ltd | Administrative & support | 2024 |
| KNF Style Ltd | Construction | 2020 |
| Knial Ltd | Wholesale & retail | 2020 |
| Knight Life Brewing Ltd | Other services | 2018 |
| Knightsbridge Court (Bournemouth) Management Limited | Households | 1995 |
| Knightwood Management Limited | Households | 1989 |
| Knightwood Properties Limited | Construction | 2015 |
| Knockout Trading Ltd | Information & communication | 2021 |
| Knocky Limited | Information & communication | 2023 |
| Knole Hall Management Company Limited | Households | 1988 |
| Knott Properties Ltd | Real estate | 2013 |
| Know Your Worth Recruitment Ltd | Administrative & support | 2022 |
| Knyveton Court Management Company Limited | Households | 2018 |
| Knyveton House Management Ltd | Real estate | 2012 |
| Knyveton Lodge Management Limited | Real estate | 2012 |
| KOA Limited | Health & social care | 2004 |
| Koala Building Services Ltd | Construction | 2021 |
| Koala Landscaping Services Ltd | Construction | 2021 |
| KOC Properties Limited | Real estate | 2021 |
| KOC Sandford Limited | Real estate | 2021 |
| Kocher Group Ltd | Health & social care | 2025 |
| Kochi 2 Mumbai Ltd | Hospitality | 2025 |
| Kohan Brothers Ltd | Real estate | 2026 |
| KOI Sakana Ltd | Hospitality | 2021 |
| Kokila Service Limited | Transport & logistics | 2021 |
| Koko Creative Limited | Professional & scientific | 2015 |
| Koko Food Ltd | Hospitality | 2025 |
| Kokunda Limited | Administrative & support | 2017 |
| Kolt Recruitment Limited | Administrative & support | 2020 |
| Komorebi FM Ltd | Hospitality | 2023 |
| Kompart Ltd | Information & communication | 2026 |
| Konak Restaurant Limited | Hospitality | 2019 |
| Koncept Architects Limited | Professional & scientific | 2009 |
| Kontraste Limited | Wholesale & retail | 2018 |
| Koovejee Holdings Ltd | Real estate | 2021 |
| KOR Skin Care Limited | Wholesale & retail | 2019 |
| Korean Grill Limited | Hospitality | 2024 |
| Korkmaz Trading Ltd | Construction | 2020 |
| Koru Architecture Ltd | Professional & scientific | 2023 |
| Koru Group (Holdings) Limited | Professional & scientific | 2025 |
| Koru Homes Limited | Real estate | 2025 |
| Kostas Grill House Ltd | Hospitality | 2024 |
| Kostek Dorset Ltd | Information & communication | 2021 |
| Kougar Services Ltd. | Real estate | 2003 |
| Koya Kitchen Ltd | Hospitality | 2026 |
| KPD Bournemouth Properties Ltd | Real estate | 2024 |
| KPL Statics Ltd | Wholesale & retail | 2025 |
| KPS Recruitment Limited | Administrative & support | 2013 |
| KPT Training and Development Ltd | Administrative & support | 2017 |
| KR Commercial Limited | Financial services | 2024 |
| KR Drive Limited | Wholesale & retail | 2024 |
| KR Events & Promotions Ltd | Arts & recreation | 2016 |