| Konastone Healthcare Ltd | Health & social care | 2016 |
| Kpfireprotect Limited | Administrative & support | 2025 |
| Kraverz Limited | Hospitality | 2025 |
| Kriboch Ltd | Health & social care | 2019 |
| Krishna Balram Private Ltd | Construction | 2018 |
| Krown Rustproofing UK Ltd | Wholesale & retail | 2020 |
| KS Carpentry & Building Services Limited | Construction | 2019 |
| KS Dhariwal Transport Ltd | Transport & logistics | 2024 |
| KS Heer Estates Limited | Real estate | 2025 |
| KS Sons Properties Ltd | Real estate | 2025 |
| Kuljas Limited | Real estate | 2026 |
| Kumar Freight Line Ltd. | Wholesale & retail | 2018 |
| Kundlas Logistics Ltd | Transport & logistics | 2020 |
| L&K Constructions Ltd | Professional & scientific | 2020 |
| La.Services and Investment Ltd | Households | 2025 |
| Laddi Food Heaven Ltd | Hospitality | 2024 |
| Laddi Sweets & Caterers Ltd | Hospitality | 2018 |
| Lagos Consulting Limited | Administrative & support | 2013 |
| LAP Academy Ltd | Education | 2024 |
| LAP Aesthetics Ltd | Other services | 2024 |
| Larryemi UK Ltd | Health & social care | 2024 |
| Lawrence Construction Properties Ltd | Construction | 2018 |
| LE AMI Limited | Other services | 2023 |
| Leadxpert Ltd | Professional & scientific | 2019 |
| Leah Crowfoot Consulting Ltd | Professional & scientific | 2021 |
| LEE Guestford Limited | Other services | 2015 |
| Legacy School of Dance CIC | Education | 2024 |
| Legend of Zorro Ltd | Wholesale & retail | 2025 |
| Legniczanka Ltd | Hospitality | 2023 |
| Leon MOT Services Ltd | Wholesale & retail | 2025 |
| LET OR Sold Ltd | Real estate | 2012 |
| Let's EAT Dessert Limited | Hospitality | 2019 |
| Levi Homes Limited | Health & social care | 2025 |
| Lexi Services 1 Limited | Other services | 2025 |
| LHR Assets Ltd | Financial services | 2021 |
| Life in Community C.I.C. | Administrative & support | 2020 |
| Lightway Surfacing Solutions Limited | Administrative & support | 2018 |
| Limit Unlimited Technologies Ltd | Information & communication | 2021 |
| Limitless Essentials Inc. Ltd | Wholesale & retail | 2021 |
| Lion Citizens Supported Living Ltd | Health & social care | 2025 |
| Lioness Security Group Ltd | Administrative & support | 2026 |
| Lisabeth Healthcare Ltd | Health & social care | 2023 |
| Litany Business Consulting Services Ltd | Professional & scientific | 2023 |
| Little Burton Fish and Chips Ltd | Hospitality | 2017 |
| Little Funeral Company Limited | Other services | 2022 |
| Little Play Cafe Ltd | Hospitality | 2023 |
| Liyc Trading Co Ltd | Wholesale & retail | 2023 |
| LMC Construction Ltd | Construction | 2025 |
| Local News Store Ltd | Wholesale & retail | 2025 |
| Local Press Ltd | Wholesale & retail | 2024 |
| Loire Charente Limited | Wholesale & retail | 2020 |
| Lola-Belle's Private Day Nursery Limited | Education | 2009 |
| Love Writing Limited | Manufacturing | 2019 |
| Lovely Hair & Beauty Ltd | Other services | 2022 |
| LOW Cost Courier Ltd | Transport & logistics | 2021 |
| Loyan Market Ltd | Wholesale & retail | 2023 |
| LRA - Pitruchaya Ltd | Administrative & support | 2022 |
| LTT Services Limited | Transport & logistics | 2020 |
| Lubana Road Carrier Ltd | Transport & logistics | 2025 |
| Lukstar Ltd | Administrative & support | 2016 |
| Lunts Healthcare Limited | Wholesale & retail | 2019 |
| Lunts Pharmacies Limited | Wholesale & retail | 1994 |
| Lutek Logistics Ltd | Transport & logistics | 2025 |
| LUX Supellex Limited | Manufacturing | 2025 |
| Luxe Auto Repairs & Paint Ltd | Wholesale & retail | 2026 |
| Luxmoneyclub Ltd | Professional & scientific | 2025 |
| L’Ashleigh Professional Limited | Other services | 2021 |
| M & a Doocey Civil Engineering Limited | Construction | 1989 |
| M & J Drilling Holding Limited | Professional & scientific | 2016 |
| M and M Private Hire Rentals Ltd | Administrative & support | 2015 |
| M Build & Remodel Ltd | Construction | 2022 |
| M D Woodtech Ltd | Manufacturing | 2009 |
| M Power Group Limited | Manufacturing | 2026 |
| M&B Care Limited | Health & social care | 2025 |
| M&H & Sons Ltd | Wholesale & retail | 2017 |
| M&J Asees Construction Ltd | Real estate | 2024 |
| M&M Motor Sale Ltd | Wholesale & retail | 2023 |
| M&M P Ltd | Wholesale & retail | 2021 |
| M. & a. Doocey Plant Hire Limited | Construction | 1983 |
| M. & J. Drilling Services Limited | Construction | 1982 |
| M. W. Plant Operator Limited | Construction | 2015 |
| M1 Garage Ltd | Wholesale & retail | 2025 |
| MA Success Limited | Arts & recreation | 2018 |
| Maan Trade Limited | Wholesale & retail | 2025 |
| Mabvazuva Limited | Wholesale & retail | 2025 |
| MAC Group (West Midlands) Limited | Extraterritorial | 2010 |
| MAC Surfacing Group Limited | Professional & scientific | 2026 |
| MAC Surfacing Limited | Construction | 2004 |
| Mac-E-Mooz Daycare Ltd | Education | 2012 |
| Machaceh a Ltd | Real estate | 2018 |
| Machsell Machine Tools Limited | Wholesale & retail | 2014 |
| Macplane Limited | Professional & scientific | 2010 |
| Madebycole Ltd | Wholesale & retail | 2023 |
| MAF Services Ltd | Transport & logistics | 2015 |
| Mafamm & Company Ltd | Administrative & support | 2023 |
| Mafp Ltd | Real estate | 2022 |
| Magical Minds Limited | Professional & scientific | 2024 |
| Magnificent UK Services Ltd. | Wholesale & retail | 2016 |
| Majhaa Transport Ltd | Transport & logistics | 2025 |
| Major Curry Affair Ltd | Hospitality | 2018 |