| JW Carpentry Limited | Construction | 2005 |
| JW Maintenance Poole Ltd | Administrative & support | 2018 |
| JW Motor Services Poole Limited | Wholesale & retail | 2020 |
| JW Property Services Ltd | Construction | 2017 |
| JWB Construction Management and Training Services Ltd | Construction | 2023 |
| Jwhp Consulting Ltd | Professional & scientific | 2024 |
| Jxeramics Ltd | Arts & recreation | 2024 |
| Jzzz (Rentals 1) Limited | Real estate | 2004 |
| Jzzz (Rentals 2) Limited | Real estate | 2022 |
| Jzzz (Rentals 3) Limited | Real estate | 2023 |
| Jzzz (Rentals 4) Limited | Real estate | 2023 |
| Jzzz (Rentals 5) Limited | Real estate | 2023 |
| Jzzz (Rentals 6) Limited | Real estate | 2024 |
| Jzzz (Rentals 7) Limited | Real estate | 2025 |
| Jzzz (Rentals 8) Limited | Real estate | 2021 |
| Jzzz (Rentals 9) Limited | Real estate | 2025 |
| Jzzz Holdings Limited | Financial services | 2025 |
| Jzzz Settlement Limited | Financial services | 2024 |
| K & S Hosking Ltd | Wholesale & retail | 2007 |
| K a Lloyd Plant Hire Ltd | Construction | 2022 |
| K C Transport Poole Limited | Transport & logistics | 2011 |
| K Clark Holdings Limited | Real estate | 2022 |
| K G I Associates Limited | Administrative & support | 2010 |
| K G Plastics Ltd | Construction | 2016 |
| K H Building Services Limited | Real estate | 1996 |
| K L G Plastics Ltd | Construction | 2014 |
| K M C Products Ltd | Wholesale & retail | 2021 |
| K M Media Limited | Administrative & support | 2016 |
| K P H Lakes Limited | Real estate | 2004 |
| K Siwak Ltd | Information & communication | 2025 |
| K Surmon Consulting Ltd | Administrative & support | 2024 |
| K&K Goods Limited | Wholesale & retail | 2025 |
| K&K Transport Limited | Transport & logistics | 2025 |
| K&L Group Ventures Ltd | Financial services | 2025 |
| K'S Nail Spa Ltd | Other services | 2024 |
| K-Fax Ltd | Financial services | 2014 |
| K-Isla Healthcare Ltd | Real estate | 2019 |
| K-Jet Aviation Ltd | Real estate | 2011 |
| K-Village Ltd | Wholesale & retail | 2022 |
| K. D. Wardrobes Limited | Manufacturing | 1996 |
| K. P Marine Limited | Manufacturing | 2023 |
| K.D.M. Partners LLP | | 2010 |
| K.F.D World Trade Samuel Limited | Wholesale & retail | 2024 |
| K.O Ecological Restoration Services Ltd | Agriculture & fishing | 2022 |
| K1DPRODUCTIONS Ltd | Information & communication | 2023 |
| K9 Groomers T/A ALL About Dogs Ltd | Other services | 2017 |
| K9 Security (Guarding) Limited | Administrative & support | 2010 |
| K9 Security Operations Limited | Financial services | 2021 |
| K9CITIZEN Dog Training Ltd | Other services | 2023 |
| K9CITIZEN Dog Walking Ltd | Other services | 2023 |
| KA DI Ecommerce Ltd | Wholesale & retail | 2025 |
| KA Hospitality PUB Limited | Hospitality | 2024 |
| Kaama Aeromarine Ltd | Manufacturing | 2017 |
| Kaas Consultin Ltd | Professional & scientific | 2025 |
| Kabaido Ltd | Information & communication | 2026 |
| Kaber Court Management Company Limited | Households | 2013 |
| Kadco Ltd | Information & communication | 2002 |
| Kadi DIA Limited | Wholesale & retail | 2023 |
| Kadima Systems Ltd | Information & communication | 2025 |
| Kahanah Care Ltd | Health & social care | 2011 |
| Kahanah Care Trading Ltd | Health & social care | 2023 |
| Kahraman Software Ltd | Information & communication | 2025 |
| Kahuku Limited | Wholesale & retail | 2018 |
| Kaion LLP | | 2025 |
| Kairos Quantitative Dynamics Ltd | Information & communication | 2024 |
| Kajnat Ltd | Financial services | 2026 |
| KAK Investment Limited | Information & communication | 2017 |
| Kaldena International Ltd | Information & communication | 2025 |
| Kaliblessings Limited | Wholesale & retail | 2025 |
| Kalm Corps Properties Ltd | Real estate | 2021 |
| Kalm Space Ltd | Other services | 2023 |
| Kalmoni Consulting Limited | Information & communication | 2021 |
| Kalonium Ltd | Wholesale & retail | 2026 |
| Kalvin Commercial Ltd | Real estate | 2025 |
| Kalvin Property Ltd | Real estate | 2021 |
| KAM KEI Limited | Wholesale & retail | 2022 |
| KAM SAN International Trading Company Ltd | Wholesale & retail | 2026 |
| KAM TAI Enterprise UK Ltd | Hospitality | 2018 |
| Kamboh Textiles Limited | Wholesale & retail | 2023 |
| Kammy Limited | Manufacturing | 2013 |
| Kampro Limited | Professional & scientific | 2011 |
| Kanchapaka Ltd | Manufacturing | 2021 |
| Kanpai Management Ltd | Professional & scientific | 2023 |
| KAR AD Studio Ltd | Information & communication | 2025 |
| Karakoram Consulting Limited | Information & communication | 2020 |
| Karakoram Limited | Information & communication | 2022 |
| Karaoke Hire Stars Ltd | Administrative & support | 2024 |
| Karbowiak Properties Ltd | Real estate | 2018 |
| Karca Construction Ltd | Construction | 2020 |
| Karca Homes Ltd | Real estate | 2023 |
| Karen Smith Ltd | Extraterritorial | 2023 |
| Kargar Maximum Access Limited | Construction | 2017 |
| Karo Developments Limited | Construction | 2017 |
| Kartechnic Limited | Wholesale & retail | 2006 |
| Karve International Ltd | Information & communication | 2021 |
| Kasper Consumable UK Ltd | Wholesale & retail | 2011 |
| KAT Recruitment Ltd | Administrative & support | 2025 |
| Katagus Inc Limited | Wholesale & retail | 2019 |
| Katame Ltd | Wholesale & retail | 2025 |
| Kate Healey. Happy Ltd | Other services | 2019 |