| Kiln Green Management Company Limited | Households | 2017 |
| KIM Mayers Assessment Services Ltd | Health & social care | 2025 |
| KIM YOU Jung Ltd | Wholesale & retail | 2024 |
| Kinbade Ltd | Other services | 2020 |
| Kincraig Management Limited | Real estate | 2017 |
| Kindra Cargo Ltd | Transport & logistics | 2022 |
| Kindred Strategies Limited | Wholesale & retail | 2025 |
| Kindredbymia Ltd | Wholesale & retail | 2025 |
| Kindstead Care Limited | Other services | 2025 |
| Kindtech Ltd | Information & communication | 2025 |
| Kingdom Caravans & Motorhomes Ltd | Wholesale & retail | 2024 |
| Kingdom Kream (Trading AS Bittersweet) Ltd | Hospitality | 2016 |
| Kingdom Suite Ltd | Hospitality | 2024 |
| Kingfisher Courier Services Ltd | Wholesale & retail | 2025 |
| Kingfisher Court Property Holdings Limited | Real estate | 2020 |
| Kingfisher Inc Limited | Real estate | 2021 |
| Kingfisher Learning Trust | Education | 2016 |
| Kingfisher Plastics & Roofing Ltd | Construction | 2023 |
| Kingland Properties Limited | Real estate | 2009 |
| Kings Produce Limited | Wholesale & retail | 2014 |
| Kingsbridge Warf North Management Company Limited | Real estate | 2009 |
| Kinshow Management & Promotions Limited | Information & communication | 2024 |
| KIO Lawson & Co Ltd | Professional & scientific | 2023 |
| Kion Capital Limited | Professional & scientific | 2021 |
| Kipling Consulting Limited | Information & communication | 2012 |
| Kiran’S Optical Ltd | Health & social care | 2025 |
| Kirby Construction (NW) Ltd | Construction | 2025 |
| Kirica Ltd | Information & communication | 2007 |
| Kirkham Conveyancing Services Ltd | Professional & scientific | 2009 |
| Kirkham Homes (Hunt Lane) Ltd | Construction | 2018 |
| Kirkham Property Ltd | Real estate | 2023 |
| Kirkham Property Management Ltd | Real estate | 2019 |
| Kirkland Trading Ltd | Administrative & support | 2026 |
| Kiss Fitness Centre Ltd | Arts & recreation | 2016 |
| Kiss My Ace Ltd | Manufacturing | 2024 |
| Kiss Online Ltd | Arts & recreation | 2023 |
| Kitchen & Bedrooms 4 U Ltd | Manufacturing | 2015 |
| Kitchen Supermarket Ltd | Professional & scientific | 2019 |
| Kitcliffe Management Limited | Real estate | 2017 |
| Kitini Limited | Manufacturing | 2021 |
| Kitwizard Limited | Wholesale & retail | 2014 |
| Kivoro Ltd | Wholesale & retail | 2025 |
| Kiwi Apartment Ltd | Real estate | 2021 |
| KJ Conveyancing Limited | Professional & scientific | 2026 |
| Kjarr Properties Ltd | Real estate | 2025 |
| KJB Enterprises Ltd | Financial services | 2026 |
| KJI Trading Ltd | Professional & scientific | 2020 |
| KJM North West Limited | Administrative & support | 2018 |
| KKI Investments Ltd | Construction | 2017 |
| KKS Investors Ltd | Real estate | 2018 |
| KL Leisure Limited | Wholesale & retail | 2020 |
| KL Properties & Holdings Limited | Real estate | 2025 |
| Klas HR Ltd | Professional & scientific | 2019 |
| Klash Limited | Administrative & support | 2018 |
| Klash Properties Limited | Real estate | 1998 |
| Klearkleen Ltd | Administrative & support | 2025 |
| Klenco Limited | Hospitality | 2017 |
| KLH Hair Ltd | Other services | 2017 |
| KLN & Co NW Ltd | Real estate | 2025 |
| KLP Electrical Contractors Ltd | Construction | 2016 |
| KLS Financial Group Ltd | Real estate | 2025 |
| KLT Transport Ltd | Transport & logistics | 2019 |
| Klub Bramboraku Ltd | Administrative & support | 2025 |
| KM Travels Ltd | Administrative & support | 2015 |
| Kmad Barbers Ltd | Other services | 2020 |
| KMC Trader Ltd | Wholesale & retail | 2019 |
| KMF Convenience Store Ltd | Wholesale & retail | 2026 |
| KML Accident Repair Centre Ltd | Wholesale & retail | 2021 |
| KMS Electro-Tech Limited | Construction | 2016 |
| KNA Maison Properties Ltd | Hospitality | 2025 |
| Knarr Mill Holdings Limited | Financial services | 2019 |
| Knect Group Limited | Professional & scientific | 2019 |
| Knight Motors Ltd | Wholesale & retail | 2026 |
| Knight Property Management Ltd | Construction | 2026 |
| Knightbridge Investments Ltd | Real estate | 2009 |
| Knightbridge Oldham Ltd | Construction | 2022 |
| Knightbridge Property MCR Ltd | Real estate | 2023 |
| Knightly's Amusements Limited | Arts & recreation | 2003 |
| Knightly's Electric Avenue Ltd | Arts & recreation | 2019 |
| Knightly's K2 Limited | Hospitality | 2023 |
| Knightlys FUN Parks Limited | Arts & recreation | 2007 |
| Knights Regency Limited | Construction | 2006 |
| Koad Financial Services Ltd | Financial services | 2026 |
| Kobe Coffee Ltd | Hospitality | 2018 |
| Kobe Ruger Ltd Ltd | Hospitality | 2024 |
| Kodeark Ltd | Information & communication | 2024 |
| Kodra Cleaning Services Ltd | Administrative & support | 2022 |
| Koffee Kingdom Limited | Hospitality | 2015 |
| Koltrane Lighting Limited | Wholesale & retail | 1986 |
| Komec Co Ltd | Wholesale & retail | 2025 |
| Konnect Recruitment Limited | Administrative & support | 2015 |
| Koome Limited | Hospitality | 2023 |
| Kopo Grips Limited | Information & communication | 2017 |
| Kornnofuli Ltd | Other services | 2025 |
| Korz Limited | Wholesale & retail | 2024 |
| Kosh Limited | Wholesale & retail | 2024 |
| Kosher Bread Limited | Manufacturing | 2023 |
| Kourah Properties Limited | Real estate | 2018 |
| KP Engineering & Automation Ltd | Manufacturing | 2007 |
| KP UK Food Ltd | Hospitality | 2023 |