| Keell Touch Ltd | Construction | 2025 |
| Keendev Ltd | Information & communication | 2026 |
| Keepbrook Media Ltd | Professional & scientific | 2025 |
| Keepers Field Management Company Limited | Households | 2021 |
| Keepg RTM Company Limited | Households | 2020 |
| Keepitlashed Ltd | Other services | 2020 |
| Keery Engineering Limited | Administrative & support | 2025 |
| Kegworth Fish Bar Ltd | Hospitality | 2019 |
| Kegworth K9 Ltd | Agriculture & fishing | 2024 |
| Kehkashan Khan Ltd | Wholesale & retail | 2024 |
| Keipei Ltd | Professional & scientific | 2011 |
| Keiranoz Surveying & Assets Stock Management Ltd | Professional & scientific | 2025 |
| Kelag Engineering Services Limited | Manufacturing | 2022 |
| Keldan Business Services Limited | Professional & scientific | 2014 |
| Kelisha Limited | Health & social care | 2018 |
| Keller Construction Ltd | Construction | 2004 |
| Keller Estates Limited | Real estate | 2020 |
| Keller Plant & Tool Hire Limited | Administrative & support | 2020 |
| Kelly Buxton Aesthetics Ltd | Other services | 2025 |
| Kelly Catering Services Limited | Hospitality | 2024 |
| Kelly Dolphin Chair Rentals Limited | Administrative & support | 2018 |
| Kelly Dolphin Salon Limited | Other services | 2012 |
| Kelly Louise Medical Aesthetics Ltd | Other services | 2023 |
| Kelly Middleton Inns Ltd | Hospitality | 2022 |
| Kelly's Logistics Limited | Professional & scientific | 2024 |
| Kema Trans Ltd | Transport & logistics | 2019 |
| Kemland Management Limited | Households | 1981 |
| Kemphouse Kitchens Limited | Administrative & support | 2017 |
| Kemydeji Ltd | Health & social care | 2021 |
| Kem’S Delight Limited | Hospitality | 2024 |
| KEN Rice Limited | Information & communication | 1982 |
| Kena Havens Ltd | Health & social care | 2025 |
| Kenaz Consultancy Ltd | Professional & scientific | 2026 |
| Kenaz Holdings Ltd | Financial services | 2026 |
| Kensaw Limited | Health & social care | 2023 |
| Kensheg Limited | Administrative & support | 2024 |
| Kensington Capital Investments Limited | Real estate | 2021 |
| Kensington Car Sales Ltd | Wholesale & retail | 2019 |
| Kensington Derby Limited | Hospitality | 2023 |
| Kensington Leisure Ltd | Hospitality | 2026 |
| Kensington Windows and Doors Ltd | Construction | 2012 |
| Kentora Breakdown Recovery Ltd | Transport & logistics | 2025 |
| Kenway Structures Ltd | Construction | 2024 |
| Kerbline Construction Ltd | Construction | 2020 |
| Kerdos Collegiate Investment One Limited | Information & communication | 2017 |
| Kerrel Arts Limited | Administrative & support | 2018 |
| Kerry Young Limited | Arts & recreation | 2011 |
| Kerrystone Limited | Real estate | 2026 |
| Keshika Limited | Wholesale & retail | 2023 |
| Kesseler UK Limited | Manufacturing | 2009 |
| Kesslerx Limited | Information & communication | 2026 |
| Kestrel MH Ltd | Health & social care | 2026 |
| KET Homes Limited | Real estate | 2023 |
| Ketbes Ltd | Real estate | 2022 |
| Kevin Jacob Estates Ltd | Real estate | 2025 |
| Kevin Morecroft Plumbing Ltd | Professional & scientific | 2014 |
| Kevin Robins Associates Ltd | Professional & scientific | 2017 |
| Kewall Ltd | Transport & logistics | 2024 |
| Key 2 Care Holdings Limited | Extraterritorial | 2015 |
| Key 2 Care Limited | Health & social care | 2005 |
| Key Bemo Limited | Construction | 1987 |
| Key Commercial Property Ltd | Financial services | 2026 |
| Key Derby Investments Limited | Real estate | 2024 |
| Key Fire Protection Limited | Other services | 2010 |
| Key IT Consulting Ltd | Information & communication | 2019 |
| Key Lettings Ltd | Real estate | 2025 |
| Key Management Systems Limited | Construction | 1996 |
| Key Superior Solutions Ltd | Real estate | 2019 |
| Key Survival Equipment Ltd | Professional & scientific | 2007 |
| Keyhaven Property Limited | Real estate | 2022 |
| Keylaw Holdings Ltd | Construction | 2025 |
| Keyload Limited | Construction | 2000 |
| Keylwerth Enterprises Ltd | Real estate | 2025 |
| Keyman Holdings Ltd | Real estate | 2019 |
| Keynergy Future Ltd | Professional & scientific | 2024 |
| Keynote Consultants Ltd | Education | 2022 |
| Keypoint Technology Limited | Manufacturing | 1996 |
| Keystone Capital Holdings Ltd | Financial services | 2026 |
| Keystone Health Limited | Health & social care | 2022 |
| Keystone Knowledge Limited | Professional & scientific | 2019 |
| Keystone Real Estate Investment Ltd | Real estate | 2019 |
| KF Surfacing Ltd | Construction | 2020 |
| KG Investment Group Limited | Real estate | 2021 |
| KG Law Services Ltd | Professional & scientific | 2023 |
| KGN Consultancy Limited | Professional & scientific | 2011 |
| Kgsuppliers Limited | Wholesale & retail | 2024 |
| KH Design Solutions Limited | Professional & scientific | 2014 |
| KH Financial Management Limited | Financial services | 2007 |
| Kh&Pw Ltd | Hospitality | 2024 |
| KH855 Ltd | Hospitality | 2026 |
| KHA Accountancy (Accounts Firm) Ltd | Administrative & support | 2023 |
| KHA Estates Ltd | Real estate | 2025 |
| Khadija Binte ALI Service Company Ltd | Administrative & support | 2025 |
| Khaira & S Limited | Construction | 2026 |
| Khaki (Eco) Ltd | Agriculture & fishing | 2021 |
| Khalakan Properties Ltd | Real estate | 2024 |
| Khalid Traders Ltd | Wholesale & retail | 2025 |
| Khalsa Children's Care Ltd | Health & social care | 2022 |
| Khalsa Haulage Ltd | Transport & logistics | 2025 |
| Khalsa Investments Ltd | Real estate | 2023 |