| KG Programming Limited | Professional & scientific | 2024 |
| KG Smith Limited | Health & social care | 2017 |
| KGR Estates Ltd | Real estate | 2024 |
| KH Car Sales Limited | Wholesale & retail | 2026 |
| KH Hire Services Ltd | Administrative & support | 2022 |
| KH Oriental Group Limited | Wholesale & retail | 2015 |
| KH Oriental Hospitality Group Limited | Hospitality | 2023 |
| KH Wholesale Limited | Wholesale & retail | 2015 |
| Khaine Photography Ltd. | Professional & scientific | 2014 |
| Khaled Farag Limited | Health & social care | 2011 |
| Khaleej Sheffield Ltd | Hospitality | 2024 |
| Khalil & Associates Ltd | Health & social care | 2026 |
| Khan & Kids T/A Mogul Foods Ltd | Wholesale & retail | 2020 |
| Khan and Brothers Properties Limited | Real estate | 2025 |
| Khan Auto Traders Ltd | Wholesale & retail | 2025 |
| Khan Bros Properties Ltd | Real estate | 2025 |
| Khan Darbar Khan Ltd | Hospitality | 2022 |
| Khan Pharm Ltd | Wholesale & retail | 2009 |
| Khan Private Work Ltd | Health & social care | 2024 |
| Khan Travel Services Limited | Administrative & support | 2018 |
| Khans Autos Trading Limited | Wholesale & retail | 2023 |
| Khans Street Food Limited | Hospitality | 2026 |
| Khari's Services Limited | Health & social care | 2020 |
| Khela Enterprises Limited | Wholesale & retail | 2005 |
| Khella Property Services Ltd | Real estate | 2020 |
| Khella Property Trading Ltd | Real estate | 2021 |
| Khepera Group Holdings Limited | Financial services | 2020 |
| Khepera Group Limited | Real estate | 2011 |
| Khepera-Uk Limited | Information & communication | 2002 |
| Khimaar Limited | Wholesale & retail | 2023 |
| Khiz Services Ltd | Wholesale & retail | 2009 |
| KHN Commercial Consultants Ltd | Administrative & support | 2012 |
| Khoda Limited | Health & social care | 2021 |
| Khozand Services Ltd | Health & social care | 2019 |
| Khrisjoi Ltd | Health & social care | 2019 |
| Khtj Ltd | Health & social care | 2021 |
| KHU Everything Ltd | Wholesale & retail | 2023 |
| KHZ Construction Limited | Construction | 2025 |
| KIA Blackburn Ltd | Hospitality | 2019 |
| KIA Technology Services Limited | Information & communication | 2025 |
| Kiaa Limited | Information & communication | 2016 |
| Kian Hot Food Limited | Hospitality | 2026 |
| Kiani (Yorkshire) Limited | Health & social care | 2016 |
| Kiboco Ltd | Professional & scientific | 2022 |
| Kibrinab Properties Limited | Real estate | 2024 |
| Kichikiti Ltd | Manufacturing | 2024 |
| Kickback Recovery Limited | Health & social care | 2023 |
| Kickoffauto Ltd | Wholesale & retail | 2025 |
| Kicks&Coe Limited | Wholesale & retail | 2025 |
| KID Acne Limited | Arts & recreation | 2007 |
| Kidder Property Ltd | Real estate | 2025 |
| Kiddykad Toys Ltd | Wholesale & retail | 2019 |
| Kiddyyoung Ltd | Wholesale & retail | 2025 |
| Kidirsil Limited | Wholesale & retail | 2025 |
| Kidology Arts Community Interest Company | Arts & recreation | 2016 |
| Kids and Kilos Ltd | Education | 2026 |
| Kids Art Academy Limited | Extraterritorial | 2018 |
| Kids Arts Academy Limited | Education | 2018 |
| Kids First Limited | Arts & recreation | 2026 |
| Kids Invent Stuff Ltd | Administrative & support | 2016 |
| Kids Plant Trees Ltd | Agriculture & fishing | 2022 |
| Kidz Clubhouse Ltd | Education | 2019 |
| KIE Comms Ltd | Information & communication | 2023 |
| Kielder WT Ltd. | Manufacturing | 2015 |
| Kiera Bridget Ltd | Information & communication | 2018 |
| Kieran Drainage Services Ltd | Administrative & support | 2025 |
| Kieran Lynch and Co (Care) Limited | Professional & scientific | 2017 |
| Kieran Lynch and Co (UK) Limited | Professional & scientific | 2012 |
| Kieron Gore Limited | Administrative & support | 2016 |
| Kieto and Kompany Limited | Hospitality | 2015 |
| Kieu's Nails Limited | Other services | 2016 |
| Kiia Limited | Real estate | 2020 |
| Kiko Pasta Limited | Hospitality | 2023 |
| Kilco Limited | Information & communication | 1997 |
| Kilcollum Limited | Professional & scientific | 2015 |
| Kilic Painting and Handyman Services Ltd | Manufacturing | 2021 |
| Kilic Property Investments Ltd | Real estate | 2022 |
| Killamarsh Dental Practice Limited | Health & social care | 2008 |
| Killamarsh Fish Ltd | Hospitality | 2026 |
| Killamarsh Foot Clinic Ltd | Health & social care | 2022 |
| Killamarsh Haulage Limited | Transport & logistics | 2015 |
| Killamarsh Physiotherapy Ltd | Health & social care | 2026 |
| Killamarsh Village Day Nursery and Pre-School Limited | Education | 2008 |
| Killaprint Limited | Professional & scientific | 2020 |
| Killer Impression Ltd | Wholesale & retail | 2013 |
| Killis Holdings Limited | Financial services | 2025 |
| Killis Limited | Wholesale & retail | 2018 |
| Kilmaurs Limited | Construction | 2025 |
| Kiln and Cloud Ltd | Wholesale & retail | 2025 |
| Kilner Broadfield Limited | Real estate | 2014 |
| Kilnfolk Coffee Ltd | Hospitality | 2022 |
| Kim's Nails & Spa Limited | Other services | 2023 |
| Kime Millennial Ltd | Real estate | 2017 |
| Kimfitt Ltd | Education | 2022 |
| Kimono Clothing Co Ltd | Wholesale & retail | 2023 |
| Kimpt Ltd | Other services | 2025 |
| KIN & Kulture Limited | Wholesale & retail | 2026 |
| KIN Culture CIC | Administrative & support | 2025 |
| KIN Pottery Works Ltd | Manufacturing | 2025 |
| KIN Wellness Studio Ltd | Hospitality | 2026 |