| Kass Developments Limited | Construction | 2026 |
| Kasyoun UK Limited | Wholesale & retail | 2020 |
| KAT FPD Ltd | Health & social care | 2013 |
| Kate Gibson Consulting Limited | Professional & scientific | 2025 |
| Kate Gray Limited | Professional & scientific | 2023 |
| Katherine Collins HR Ltd | Administrative & support | 2021 |
| Katies Homemade Kitchen Limited | Hospitality | 2019 |
| Katie’S Groom Room Ltd | Other services | 2022 |
| Katrina Lewis Interiors Limited | Other services | 2021 |
| Katypave Concrete Products Ltd | Manufacturing | 2019 |
| Kaur Sidana Ltd | Administrative & support | 2021 |
| Kauser Properties Ltd | Wholesale & retail | 2014 |
| Kavanagh Transport Consultancy Limited | Administrative & support | 2025 |
| Kavanagh Woods Consulting Limited | Professional & scientific | 2003 |
| Kawaii Global Ltd | Wholesale & retail | 2023 |
| Kawyka Property Service Limited | Real estate | 2024 |
| KAY Medicals Limited | Health & social care | 2010 |
| Kays Platinum Estates Ltd | Real estate | 2024 |
| KAZ PUB Solutions Ltd | Hospitality | 2018 |
| KAZ Traders 110 Limited | Other services | 2025 |
| KB & a Ltd | Transport & logistics | 2020 |
| KB Care Recruitment Agency Ltd | Administrative & support | 2025 |
| KB Electrical Projects Ltd | Administrative & support | 2017 |
| KBR Motors Limited | Wholesale & retail | 2026 |
| Kbrb Properties Ltd | Real estate | 2024 |
| KC Planning and Property Limited | Households | 2024 |
| KCM Healthcare Ltd | Health & social care | 2023 |
| KD Afro Ltd | Wholesale & retail | 2025 |
| KD Contracting Ltd | Construction | 2026 |
| KD Plumbing and Property Services Ltd | Construction | 2022 |
| KD Vapes Limited | Wholesale & retail | 2022 |
| KDN Property Services Limited | Construction | 2009 |
| KDP Management Solutions Limited | Wholesale & retail | 2001 |
| Ke&Ke Limited | Wholesale & retail | 2024 |
| Keane J Limited | Public administration | 2021 |
| Keathan Ltd | Health & social care | 2025 |
| Keep Safe Lockers Ltd | Administrative & support | 2023 |
| Keeping Developments Limited | Information & communication | 2008 |
| Keeproy Properties Limited | Real estate | 1984 |
| Keith Matthews Electrical Contractors Limited | Construction | 2002 |
| Kel-Mech-El Limited | Construction | 2025 |
| Kelaty Asset Management Ltd | Construction | 2021 |
| Kelly Construction (Huddersfield) Limited | Construction | 2019 |
| Kelly Power Network Ltd | Construction | 2022 |
| Kelstone Limited | Construction | 2004 |
| Kelvin Smith Enterprises Limited | Transport & logistics | 2007 |
| Kemritz Ltd | Health & social care | 2025 |
| Kemtec Ltd | Administrative & support | 2024 |
| Kendale Publications Limited | Arts & recreation | 1983 |
| Kenfconsultancy Ltd | Professional & scientific | 2021 |
| Kennedy Lettings Ltd | Real estate | 2021 |
| Kenneth Hall (Builder) Limited | Construction | 1963 |
| Kenneth Hall (Residential) Limited | Real estate | 2024 |
| Kenny & Friends Limited | Other services | 2022 |
| Kentro CIC | Real estate | 2025 |
| Kentronix Engineering Ltd | Professional & scientific | 2024 |
| Kentzura Ltd | Professional & scientific | 2025 |
| Kenworth Products Limited | Wholesale & retail | 2019 |
| Kenyon Leigh Limited | Professional & scientific | 2022 |
| Kepa Global Ltd | Information & communication | 2025 |
| Kerf Joinery Ltd | Construction | 2017 |
| Keri-Amber Ltd | Information & communication | 2022 |
| Kerry Katona Ltd | Arts & recreation | 2020 |
| Kerrys Five a Day Limited | Arts & recreation | 2024 |
| Kesmm Limited | Wholesale & retail | 2025 |
| Kesterwood Limited | Professional & scientific | 2003 |
| Kestrel Developments (NW) Limited | Construction | 1996 |
| Kestrel NO 1 Limited | Professional & scientific | 2001 |
| Kevard Textile Machinery (1994) Limited | Professional & scientific | 1983 |
| Kevin Davies Consulting Limited | Professional & scientific | 2023 |
| Kevin Moorhouse Limited | Education | 2014 |
| Kevs Corner Bakery Ltd | Hospitality | 2025 |
| KEW Dog Blackley Ltd | Other services | 2025 |
| Kewmore Solutions Limited | Information & communication | 2023 |
| Key Business Planning Limited | Financial services | 2009 |
| Key Commercial Finance Solutions Ltd | Financial services | 2007 |
| Key Property Solutions Manchester LLP | | 2007 |
| Key Selection Investments Limited | Financial services | 2020 |
| Key Selection Limited | Financial services | 2011 |
| Key Selection Recruitment Limited | Administrative & support | 2020 |
| Key Staffing Solutions Ltd | Administrative & support | 2025 |
| Key Words Copywriting Ltd | Information & communication | 2012 |
| Keyaanoos Limited | Hospitality | 2024 |
| Keycadsolutions Ltd | Construction | 2022 |
| Keydean Limited | Wholesale & retail | 2018 |
| Keys Kitchen Limited | Hospitality | 2018 |
| Keystone Healthcare Holdings Limited | Professional & scientific | 2014 |
| Keystone Healthcare Ltd | Administrative & support | 2005 |
| Keystone Learning Ltd | Education | 2024 |
| Keystone Networks Limited | Information & communication | 2025 |
| Keyturn Limited | Real estate | 2021 |
| Kg.Gill Ltd | Transport & logistics | 2019 |
| KGB Productions Limited | Information & communication | 2006 |
| KH Careers Hub Ltd | Other services | 2025 |
| Khaan Autos Ltd | Wholesale & retail | 2024 |
| Khadijah Ltd | Health & social care | 2021 |
| Khadim Stores Ltd | Wholesale & retail | 2026 |
| Khadim Wholesale Ltd | Wholesale & retail | 2008 |
| Khajwal-Dar Limited | Health & social care | 2024 |
| Khak ACS Ltd | Wholesale & retail | 2026 |