| KAP Concept Autos Ltd | Wholesale & retail | 2025 |
| Kasada MCR Limited | Information & communication | 2025 |
| Kastean Limited | Transport & logistics | 2021 |
| Kataria Investment Ltd | Real estate | 2024 |
| Katsha Properties Ltd | Real estate | 2026 |
| Kaynat Limited | Manufacturing | 2015 |
| KCA Holdings Ltd | Financial services | 2016 |
| KD Holiday Rentals Ltd | Real estate | 2025 |
| Kdgf Consulting Ltd | Other services | 2020 |
| KEA DAS Developments Ltd | Construction | 2024 |
| Kenshi Cyane Limited | Wholesale & retail | 2024 |
| Kentanu Transport Limited | Transport & logistics | 2017 |
| Key Computer Applications Limited | Information & communication | 1990 |
| KHB Global Ltd | Professional & scientific | 2025 |
| Khuram Leigh Limited | Wholesale & retail | 2024 |
| Khushals Limited | Wholesale & retail | 2017 |
| Khushals Management Limited | Real estate | 2023 |
| Ki&Ka Beauty Limited | Other services | 2024 |
| Kieron Peet Ltd | Construction | 2019 |
| Kind Hands Health Care Ltd | Health & social care | 2024 |
| King House Limited | Wholesale & retail | 2020 |
| Kings Park (Leigh) Management Limited | Households | 2013 |
| Kinsella Industries Limited | Extraterritorial | 2010 |
| Kinzfood Limited | Hospitality | 2023 |
| Kirk OFF Licence Limited | Wholesale & retail | 2017 |
| Kitto & Co Limited | Professional & scientific | 2010 |
| Kiva Automotive Limited | Administrative & support | 2022 |
| KLA Direct Services Ltd | Transport & logistics | 2024 |
| KLM Civils Ltd | Construction | 2016 |
| Kloci London Ltd | Wholesale & retail | 2020 |
| Klutch Kingz Ltd | Wholesale & retail | 2025 |
| KM Family Ltd | Hospitality | 2024 |
| KN95-UK Ltd | Wholesale & retail | 2020 |
| KNIGHT369 Proporties Ltd | Real estate | 2024 |
| Knightsway HR Consultancy Limited | Professional & scientific | 2018 |
| Koddus Leigh Ltd | Hospitality | 2019 |
| Kodoclo Ltd | Wholesale & retail | 2026 |
| Kojiro Ltd | Wholesale & retail | 2023 |
| Korezi Services Ltd | Administrative & support | 2016 |
| KP Eyewear Huddersfield Limited | Health & social care | 2024 |
| KP Eyewear Leeds Limited | Health & social care | 2024 |
| Kraken Signs Ltd | Professional & scientific | 2024 |
| Krakin Catering Ltd | Hospitality | 2019 |
| KRD Barber (Leigh) Ltd | Other services | 2025 |
| Kris Neale & Sons Ltd | Manufacturing | 2021 |
| Kris Neale & Sons Property Ltd | Real estate | 2024 |
| Kristos Chippy Limited | Hospitality | 2020 |
| Krystian Walento Transport Ltd. | Transport & logistics | 2015 |
| KSB Trade Ltd | Wholesale & retail | 2025 |
| Kurdish Barbers Ltd | Other services | 2025 |
| Kusab Training Matters Limited | Education | 2021 |
| Kwok YI Service Limited | Wholesale & retail | 2025 |
| KY Applications Ltd | Administrative & support | 2019 |
| L Coco Limited | Wholesale & retail | 2025 |
| L D Bathrooms Ltd | Construction | 2024 |
| L K Motor Company Ltd | Wholesale & retail | 2025 |
| L&K Stores Ltd | Wholesale & retail | 2026 |
| L&R Projects Ltd | Construction | 2020 |
| L&R Vehicles Ltd | Wholesale & retail | 2024 |
| L.A.M Urban Woodcraft Ltd | Manufacturing | 2024 |
| L1 Group Holdings Ltd | Financial services | 2025 |
| LA Building Solutions Ltd | Construction | 2025 |
| LA Familia Pizza Ltd | Hospitality | 2026 |
| Lacey Darwen Ltd | Professional & scientific | 2023 |
| Laltex & Co.Limited | Wholesale & retail | 1962 |
| Laltex Promo Limited | Professional & scientific | 2016 |
| Landlord Portfolio Services Ltd | Real estate | 2024 |
| Landside Mechanical Services Limited | Construction | 2001 |
| Langley Installations Ltd | Construction | 2025 |
| Laniyan Healthcare Ltd | Transport & logistics | 2018 |
| Laserstrip IP Ltd | Administrative & support | 2026 |
| Laserstrip Ltd | Extraterritorial | 2026 |
| Laundry FIX Domestic Ltd | Other services | 2026 |
| Laundry FIX Ltd | Manufacturing | 2020 |
| Lauren Elizabeth Installation & Maintenance Services Limited | Construction | 2022 |
| Lauren Elizabeth Window Systems Limited | Information & communication | 2018 |
| Lavender Media Ltd | Professional & scientific | 2021 |
| Lawtek Ltd | Professional & scientific | 2003 |
| Lawton Crossland Ltd | Real estate | 2025 |
| Layla & Co NW Ltd | Hospitality | 2025 |
| LAZER3D Ltd | Manufacturing | 2020 |
| LDD Haulage Limited | Transport & logistics | 2025 |
| LDK Design Group Ltd | Wholesale & retail | 2025 |
| LDM Productions Limited | Information & communication | 2022 |
| LDM Roofing Group Ltd | Construction | 2016 |
| LDM Services Limited | Administrative & support | 2019 |
| LDM Studios Limited | Information & communication | 2022 |
| LE Bar DE Cheveux Ltd | Other services | 2013 |
| Leca's Trans Ltd | Transport & logistics | 2015 |
| LEE Crombleholme Consultancy Ltd | Arts & recreation | 2013 |
| Lee's Waste Wizards Ltd | Water & waste | 2019 |
| Legacy 2022 Ltd | Construction | 2023 |
| Legacy Telecom Limited | Information & communication | 2003 |
| Leigh 1967 Limited | Extraterritorial | 2014 |
| Leigh Accountants Limited | Professional & scientific | 2017 |
| Leigh Boxing and Community Gym CIC | Education | 2023 |
| Leigh Brewing and Malting Company CIC | Manufacturing | 2025 |
| Leigh Building Preservation Trust Limited | Real estate | 2015 |
| Leigh Cables Commercial Limited | Wholesale & retail | 2004 |
| Leigh Cables Manufacturing Limited | Wholesale & retail | 2016 |