| Kitchen Trade Suppliers EOT Limited | Financial services | 2025 |
| Kitchen Trade Suppliers Ltd | Wholesale & retail | 1996 |
| Kitchen Transformation Private Limited | Construction | 2019 |
| Kitchen Transformations Ltd | Construction | 2017 |
| Kitchenex Limited | Wholesale & retail | 2012 |
| Kitchenproperties Limited | Real estate | 2025 |
| Kitching Property Investments Ltd | Real estate | 2024 |
| Kitching Property Management Ltd | Real estate | 2024 |
| Kitchip Consultancy Limited | Health & social care | 2025 |
| Kite Miller Ltd | Professional & scientific | 2014 |
| Kith and KIN Photography Ltd | Professional & scientific | 2023 |
| Kitlocker.Com Limited | Manufacturing | 2008 |
| Kitson Consult Limited | Professional & scientific | 2017 |
| Kitson's Thermal Supplies Limited | Extraterritorial | 1965 |
| Kitsu KOI Limited | Wholesale & retail | 2009 |
| Kittyklawset Ltd | Wholesale & retail | 2023 |
| Kiveton Groundworks Limited | Construction | 2009 |
| Kiveton Park and Wales Community Development Trust | Education | 1997 |
| Kiveton Park and Wales Village Hall | Real estate | 2007 |
| Kiveton Park Health & Fitness Suite Limited | Arts & recreation | 2005 |
| Kiveton Park Steel Ltd | Manufacturing | 2024 |
| Kiveton Properties Ltd | Real estate | 2023 |
| Kiveton TAP Ltd | Hospitality | 2024 |
| Kiveton Turf Ltd | Administrative & support | 2026 |
| Kiveton Vape&Beyond Ltd | Wholesale & retail | 2023 |
| Kiveton Windows Ltd | Construction | 2022 |
| Kivintshuma Healthcare Ltd | Health & social care | 2014 |
| Kiviro Ltd | Professional & scientific | 2025 |
| Kivo 47 Ltd | Hospitality | 2025 |
| KJ Auto Electrician Limited | Wholesale & retail | 2025 |
| KJ Civils Ltd | Energy | 2025 |
| KJ Hire Ltd | Administrative & support | 2016 |
| KJ Sales Ltd | Wholesale & retail | 2025 |
| KJB Cuts Limited | Information & communication | 2015 |
| Kjubane Limited | Transport & logistics | 2025 |
| KJW Building Services Ltd | Construction | 2021 |
| KK Driving Solutions Ltd | Education | 2025 |
| Kkbw Limited | Real estate | 2020 |
| KKH Haematology Limited | Health & social care | 2014 |
| Kkrii Ltd | Other services | 2026 |
| Kkvels PVT Ltd | Wholesale & retail | 2026 |
| KL Medical Ltd | Health & social care | 2024 |
| Klass Hair and Beauty Limited | Other services | 2012 |
| Klaus Investments Ltd | Real estate | 2019 |
| KLB Family Holdings Ltd | Wholesale & retail | 2026 |
| KLB Services Limited | Wholesale & retail | 2008 |
| Klean Slate Limited | Administrative & support | 2024 |
| Kleanix Services Ltd | Administrative & support | 2025 |
| Kleber Design Ltd | Information & communication | 1997 |
| Kled UK Limited | Professional & scientific | 2015 |
| Kleeli Holdings Limited | Financial services | 2026 |
| Kleeli Property Investments Limited | Real estate | 2022 |
| Klei Limited | Professional & scientific | 2023 |
| Kline Talent Ltd | Administrative & support | 2024 |
| Klink Hospitality Limited | Hospitality | 2023 |
| KLL Logistics Ltd | Transport & logistics | 2022 |
| Klom Services Limited | Arts & recreation | 2017 |
| Klove Limited | Information & communication | 2016 |
| Klr-Rad Limited | Health & social care | 2024 |
| Klrb Property Management Limited | Real estate | 2024 |
| KLS Bookings Limited | Arts & recreation | 2023 |
| KLS Residentials Limited | Real estate | 2024 |
| Klubcolours Ltd | Wholesale & retail | 2022 |
| Klue Disability Ltd | Manufacturing | 2025 |
| KLW Group Ltd | Construction | 2021 |
| Klwt Audio Limited | Manufacturing | 2025 |
| Klyk Limited | Information & communication | 2020 |
| Klyner Solutions Limited | Information & communication | 2023 |
| Klyracommerce Limited | Wholesale & retail | 2026 |
| KM Football Scouting Limited | Arts & recreation | 2025 |
| KM Hairdresses and Salon Ltd | Other services | 2017 |
| KM IFA Support Ltd | Administrative & support | 2024 |
| Km&E Services Limited | Construction | 2025 |
| Kmac Services Ltd | Agriculture & fishing | 2015 |
| Kmac Services Properties Ltd | Real estate | 2026 |
| Kmaz Ltd | Health & social care | 2020 |
| KMB Motor Factors Ltd | Wholesale & retail | 2019 |
| KMD Property Services Limited | Households | 2016 |
| KMI Estates Ltd | Real estate | 2019 |
| KMK Lifestyle Ltd | Wholesale & retail | 2020 |
| KML Caravans Ltd | Wholesale & retail | 2021 |
| KML Supplies Limited | Wholesale & retail | 2013 |
| KMR Building Group Ltd | Construction | 2025 |
| KMR Lounge Ltd | Hospitality | 2023 |
| KMR Property Developments Ltd | Real estate | 2025 |
| KMS Estates Limited | Administrative & support | 2003 |
| KMU Group Ltd | Financial services | 2024 |
| KN Capital Limited | Real estate | 2020 |
| KN Development Group Limited | Construction | 2020 |
| KN Group Limited | Financial services | 2020 |
| KN Group Services Limited | Financial services | 2020 |
| Knaggs Farriery Services Limited | Professional & scientific | 2008 |
| Knck Limited | Arts & recreation | 2018 |
| Knead Sheff Limited | Hospitality | 2025 |
| Knekt Limited | Professional & scientific | 2025 |
| KNG Crepes Limited | Hospitality | 2025 |
| Kngdompcs Ltd | Information & communication | 2023 |
| Kngs Car Ltd | Wholesale & retail | 2025 |
| Knife Tech Limited | Manufacturing | 2008 |
| Knight & Dellaway Ltd | Wholesale & retail | 2017 |