| KB Care Limited | Health & social care | 2019 |
| KB1 Group Limited | Real estate | 2022 |
| KB1 Homes Limited | Real estate | 2022 |
| KB1 Properties Limited | Real estate | 2023 |
| KBA Store Ltd | Wholesale & retail | 2025 |
| Kbass Ltd | Administrative & support | 2023 |
| KBG Security Solutions Limited | Administrative & support | 2007 |
| Kboy Shine Ltd | Wholesale & retail | 2019 |
| KD Digital 99 Ltd | Construction | 2025 |
| KD Group (Midlands) Ltd | Real estate | 2026 |
| Keaner Kleaning Limited | Administrative & support | 2014 |
| Kebano LAB Ltd | Hospitality | 2026 |
| Keep a Smile Limited | Health & social care | 2010 |
| Keights Precision Tooling Limited | Manufacturing | 2006 |
| Kekius Maximus Limited | Financial services | 2025 |
| Kelea J Financial Ltd | Professional & scientific | 2020 |
| Kelly Services B'Ham Ltd | Transport & logistics | 2017 |
| Kelvin Way Hand Car Wash Ltd | Administrative & support | 2025 |
| Kelvinwaymotors Ltd | Wholesale & retail | 2023 |
| Kenroy Electrics Limited | Construction | 2018 |
| Kensington Corporation Limited | Other services | 2022 |
| Kenya Tea Industries Ltd | Manufacturing | 2003 |
| Kerala Ayur Massage Centre Ltd | Health & social care | 2025 |
| Kerry Ewers Ltd | Education | 2023 |
| Key Found Ltd | Real estate | 2022 |
| Keymark Estates Ltd | Real estate | 2026 |
| KGM Midlands Ltd | Hospitality | 2023 |
| KGS Transport Ltd | Transport & logistics | 2021 |
| KH Optical Limited | Health & social care | 2021 |
| Khadija Care Limited | Health & social care | 2019 |
| Khadijas Jewels Ltd | Wholesale & retail | 2019 |
| Khadka Devi Ltd | Real estate | 2026 |
| Khaira Care Ltd | Wholesale & retail | 2009 |
| Khaira Studio Ltd | Other services | 2021 |
| Khali Housing Estate Limited | Real estate | 2025 |
| Khalsa Nursery CIC | Education | 2025 |
| Khalsa Trading Transport Ltd | Transport & logistics | 2015 |
| Khan Fruits and VEG Ltd | Wholesale & retail | 2025 |
| Khela (UK) Holdings Limited | Real estate | 2020 |
| Khela Couriers Ltd | Transport & logistics | 2025 |
| Khela Group Limited | Financial services | 2023 |
| Khurana’S Booze and News Ltd | Wholesale & retail | 2021 |
| Kiat Ltd | Wholesale & retail | 2025 |
| Kicks Investments Ltd | Real estate | 2018 |
| Kijiji Kimataifa Community Interest Company | Education | 2025 |
| KIN Birmingham Limited | Real estate | 2020 |
| Kings Kitchen Caribbean Takeaway Ltd | Hospitality | 2026 |
| KIT ME OUT Group Limited | Wholesale & retail | 2016 |
| Kiyu Mobile Salon Ltd | Other services | 2026 |
| Kkaura Limited | Health & social care | 2023 |
| KKG Pharma H/C Limited | Wholesale & retail | 2025 |
| Klas Conte Limited | Administrative & support | 2015 |
| Kleen Project Ltd | Administrative & support | 2024 |
| Klocleaning Ltd | Manufacturing | 2026 |
| KMI Consultancy Ltd | Professional & scientific | 2018 |
| KMJ Convenience Stores Ltd | Wholesale & retail | 2021 |
| KMS Associates Limited | Professional & scientific | 2012 |
| Knsolutionss Limited | Wholesale & retail | 2023 |
| Koasha Estates Ltd | Real estate | 2024 |
| Kofai Technologies Ltd | Information & communication | 2026 |
| Kogut Logistics Ltd | Construction | 2021 |
| Kohli Kutz Ltd | Other services | 2018 |
| KOJ Ltd | Hospitality | 2026 |
| Kooner Solutions Ltd | Education | 2024 |
| Korona Wholesale Ltd | Wholesale & retail | 2008 |
| Kostas Constructions Ltd | Construction | 2019 |
| Kpal Limited | Transport & logistics | 2025 |
| KR Dealz Ltd | Wholesale & retail | 2022 |
| Krazy Klean Ltd | Administrative & support | 2025 |
| KRJ Holdings Ltd | Real estate | 2023 |
| Krni Services Ltd | Transport & logistics | 2024 |
| Krrish Jewellers Ltd | Wholesale & retail | 2024 |
| Kruszka Trans Ltd | Transport & logistics | 2015 |
| Krypto Competitions Ltd | Arts & recreation | 2026 |
| KS Kitchen & Bedroom Ltd | Construction | 2021 |
| KS Manufacturing Ltd | Manufacturing | 2026 |
| KS Roadways Ltd | Transport & logistics | 2026 |
| KSL Transportation Ltd | Transport & logistics | 2024 |
| KT Storage Ltd | Transport & logistics | 2025 |
| Kubtrans Ltd | Transport & logistics | 2022 |
| Kuddiesbeautysecrets Ltd | Wholesale & retail | 2025 |
| Kudesnik Ltd | Wholesale & retail | 2025 |
| Kulthum Properties Ltd | Real estate | 2018 |
| Kundai Carlton Taderera Ltd | Construction | 2025 |
| Kunoor Taxis Ltd | Transport & logistics | 2025 |
| Kurdish Airlines Ltd | Administrative & support | 2019 |
| Kushi Sunder Properties Limited | Real estate | 2023 |
| Kushiyara Solution Limited | Financial services | 2024 |
| Kval Roofing Ltd | Construction | 2020 |
| L.18.27 Limited | Administrative & support | 2022 |
| L.M.P Security Solutions Ltd | Administrative & support | 2020 |
| L23 Digital Ltd | Information & communication | 2022 |
| LA Aircraft Support Limited | Manufacturing | 2021 |
| LA Benediction Care Ltd | Health & social care | 2016 |
| LA Cakery Limited | Hospitality | 2022 |
| Laddi Properties Ltd | Real estate | 2021 |
| Ladies of Leisure Ltd | Arts & recreation | 2022 |
| Laesnys Ltd | Extraterritorial | 1996 |
| Lagani Properties Ltd | Real estate | 2025 |
| Lakelife Limited | Arts & recreation | 2017 |