| Link by Design Limited | Professional & scientific | 2014 |
| Link by Lighting Limited | Manufacturing | 2014 |
| Link by Systems Limited | Manufacturing | 2014 |
| Linnel IT Consultant Ltd | Information & communication | 2023 |
| Lioli Limited | Other services | 2019 |
| Lion Ahmet Ltd | Construction | 2021 |
| Lion Lane Properties Ltd | Real estate | 2020 |
| Lion's and Lionesses Ltd | Wholesale & retail | 2026 |
| Lioncrest Automotive Ltd. | Wholesale & retail | 2025 |
| Lioncrest Logistics Ltd | Transport & logistics | 2025 |
| Lionhead Limited | Real estate | 2017 |
| Lions Construction Repair Services Limited | Construction | 2021 |
| Lipersk Ltd | Other services | 2019 |
| Liquid Fleet Holdings EOT Limited | Administrative & support | 2022 |
| Liquid Fleet Holdings Ltd | Administrative & support | 2018 |
| Liquid Fleet Limited | Administrative & support | 2005 |
| Lisa Webb Photography Ltd | Professional & scientific | 2018 |
| Lisec (UK and Ireland) Limited | Wholesale & retail | 2003 |
| Litigation Finance Limited | Financial services | 2025 |
| Little Acre Properties Limited | Real estate | 2021 |
| Little Chicks Pre-School Limited | Health & social care | 2014 |
| Little Dragons Child Care Centre Limited | Education | 2009 |
| Little Explorers Nursery Telford Ltd | Education | 2025 |
| Little Istanbul's Barber Ltd | Other services | 2024 |
| Little NUT Ltd | Professional & scientific | 2008 |
| Little Rascals Childrens Salon Ltd | Other services | 2023 |
| Little Wenlock Properties (Shropshire) Ltd | Real estate | 2006 |
| Live Life Nights Ltd | Arts & recreation | 2024 |
| Livestream Nation | Education | 2020 |
| LIZ Ofori Limited | Health & social care | 2014 |
| Lizziely Ltd | Wholesale & retail | 2025 |
| LJ Care Limited | Health & social care | 2010 |
| Ljk-P Limited | Wholesale & retail | 2020 |
| LJR Commercial Solutions Ltd | Extraterritorial | 2022 |
| LJR Sweeper Services Ltd | Manufacturing | 2025 |
| LKP Construction Ltd | Construction | 2022 |
| Lloyds Bathroom & Plumbing Ltd | Construction | 2025 |
| Lloyds Electrical Design Limited | Construction | 2015 |
| Lloyds Safety Ltd | Extraterritorial | 2023 |
| LLT Holdings Ltd | Financial services | 2021 |
| LMB Software Solutions Limited | Information & communication | 2025 |
| LMG Projects Ltd | Construction | 2019 |
| LNV Essentials Ltd | Wholesale & retail | 2026 |
| Local Buzz Ltd | Professional & scientific | 2025 |
| Local Home Movers Ltd | Water & waste | 2025 |
| Local Print Pros Ltd | Manufacturing | 2023 |
| Local Support Community Interest Company | Hospitality | 2025 |
| Local Tint Limited | Extraterritorial | 2023 |
| Lockdown Cyber Security Limited | Information & communication | 2020 |
| Locked UP Events Ltd | Hospitality | 2025 |
| Lockett & Co Limited | Extraterritorial | 2010 |
| Lockfit (Shropshire) Limited | Other services | 2019 |
| Lockin’ Stays Ltd | Hospitality | 2025 |
| Lockley Security Ltd | Administrative & support | 2011 |
| LOCKMAN247 Locksmiths Ltd | Manufacturing | 2015 |
| Lockside Steakhouse Telford Limited | Hospitality | 2026 |
| Lodger Bars Limited | Professional & scientific | 2013 |
| Lodginet Holding Ltd | Financial services | 2024 |
| Lodginet Ltd | Construction | 2021 |
| Loftus Property Group Ltd | Real estate | 2025 |
| Logical Timber Limited | Wholesale & retail | 2020 |
| Logical-Networks Limited | Information & communication | 2016 |
| Logik FX Limited | Other services | 2018 |
| Logistics Training Services (Midlands) Ltd | Administrative & support | 2006 |
| Lohne Services Ltd | Other services | 2023 |
| Lokat Holdings Limited | Real estate | 2021 |
| LOL Health Ltd | Administrative & support | 2016 |
| Lola's Cooking Academy CIC | Education | 2024 |
| Loluxe Limited | Wholesale & retail | 2026 |
| Lomi Estates Ltd | Hospitality | 2025 |
| London Blinds Limited | Extraterritorial | 2017 |
| London BLINDS4LESS Limited | Extraterritorial | 2018 |
| London Court Apartments Management Ltd | Households | 2020 |
| Lonely Seat Limited | Other services | 2021 |
| Longside Debt Consultancy Ltd | Professional & scientific | 2024 |
| Longswood Developments Ltd | Construction | 2024 |
| Longswood Holdings Ltd | Other services | 2021 |
| Lonnies Ltd | Other services | 2018 |
| Loop Business Solutions Limited | Administrative & support | 2016 |
| Lora Consulting Ltd | Information & communication | 2024 |
| Lorca Ltd | Other services | 2020 |
| Lorrward Ltd | Real estate | 2016 |
| Lotus Advisory & Consulting Ltd | Information & communication | 2024 |
| Lotus Asset Partners Limited | Real estate | 2021 |
| Lotus Edge Ltd | Information & communication | 2024 |
| Lotus Retail Stores Limited | Wholesale & retail | 2019 |
| Lotus Rising CIC | Education | 2025 |
| Louchee Clean Ltd | Administrative & support | 2022 |
| Loud Media Ltd | Professional & scientific | 2024 |
| Loughborough Road 1970 Limited | Extraterritorial | 2014 |
| Louise Glover Healthcare Ltd | Professional & scientific | 2016 |
| Lourus Limited | Professional & scientific | 2024 |
| Love & Savvy B Ltd | Arts & recreation | 2025 |
| Love for Recycle Ltd | Wholesale & retail | 2021 |
| Love Hair on Broadway Ltd | Other services | 2022 |
| Love IS Limited | Wholesale & retail | 2016 |
| Love Lane Homes Ltd | Construction | 2026 |
| Lovemark Care Limited | Administrative & support | 2020 |
| Loving My Bump Limited | Wholesale & retail | 2014 |
| LOW Carbon Digital Ltd | Information & communication | 2025 |