| Lenson Limited | Administrative & support | 2012 |
| LEO Cleaners Ltd | Administrative & support | 2025 |
| Lest WE Forget Ministries Limited | Wholesale & retail | 2015 |
| Levant Perfume Ltd | Wholesale & retail | 2020 |
| Level House Games Limited | Information & communication | 2023 |
| Levron Limited | Wholesale & retail | 2007 |
| LEX Allan Limited | Real estate | 2010 |
| Lexica Properties Limited | Real estate | 2021 |
| Leyshon Properties Limited | Real estate | 2017 |
| LG Plants Limited | Financial services | 2025 |
| Lgtt Consultings UK Ltd | Administrative & support | 2025 |
| LH Motorhome Holidays Ltd | Wholesale & retail | 2018 |
| LH Motorhome Rentals Ltd | Other services | 2022 |
| Lia-Con Ltd | Administrative & support | 2025 |
| Liam's Housing Ltd | Real estate | 2025 |
| Libas Luxe Ltd | Wholesale & retail | 2025 |
| Life Centered Planners Limited | Financial services | 2018 |
| Lifting Development Services Limited | Professional & scientific | 2022 |
| Lifting Gear Centre Limited(The) | Extraterritorial | 1985 |
| Lifting Supplies Limited | Manufacturing | 2008 |
| Light Lion Distribution Ltd | Wholesale & retail | 2024 |
| Lighthouse Coffee Stop Limited | Hospitality | 2012 |
| Lighthouse Venture Holdings Limited | Financial services | 2010 |
| LIL Watan Holding Company Ltd | Financial services | 2024 |
| LIL Watan Ltd | Hospitality | 2019 |
| Lilsap Limited | Construction | 2023 |
| Lily Blue Gifts and Home Ltd | Wholesale & retail | 2013 |
| Lily Roxy Cleaning Limited | Administrative & support | 2022 |
| LIN LIU Limited | Hospitality | 2020 |
| Lindon Limited | Wholesale & retail | 2002 |
| Lindsay Davies Limited | Health & social care | 2022 |
| Link Development Construction Services Ltd | Construction | 2018 |
| Link Load Logistics Ltd | Other services | 2019 |
| Listen to the Music Limited | Arts & recreation | 2015 |
| Lithium Forktrucks Ltd | Extraterritorial | 2022 |
| Little Aston Estates Limited | Construction | 2017 |
| Little Blue OWL Ltd | Wholesale & retail | 2023 |
| Little Hands Daycare Group Holdings Ltd | Health & social care | 2025 |
| Little Hands Daycare Group Ltd | Health & social care | 2022 |
| Little Lobsters Play Centre Ltd | Arts & recreation | 2022 |
| Little Peaches Nursery Stourbridge Ltd | Education | 2025 |
| Little Saints Preschool Stourbridge Management Committee Ltd. | Education | 2011 |
| Little Swimmers UK Limited | Arts & recreation | 2023 |
| Littlethink Limited | Education | 2018 |
| Littleton Enterprises Limited | Transport & logistics | 2021 |
| Livava Home Ltd | Wholesale & retail | 2024 |
| Livells Contracts Ltd | Construction | 2026 |
| Livemi Limited | Professional & scientific | 2013 |
| LJB Financial Services Ltd | Professional & scientific | 2018 |
| LJG Property Holdings Limited | Real estate | 2026 |
| Lkcn Properties Limited | Real estate | 2024 |
| Lloyd's Conveyancing Services Limited | Professional & scientific | 2022 |
| Llure Limited | Construction | 2021 |
| LNN Engineering Services Limited | Construction | 2014 |
| LNZ Safety Solutions Ltd | Administrative & support | 2025 |
| Local Building Control Limited | Construction | 2019 |
| Lockley Brickworks Ltd | Construction | 2020 |
| Lockside Steakhouse Limited | Hospitality | 2017 |
| Lockwood Laundry Services Limited | Administrative & support | 2016 |
| Lofi Inductions Ltd | Health & social care | 2023 |
| Loft Event Group Ltd | Information & communication | 2019 |
| Loftus Coaching and Consultancy Limited | Education | 2022 |
| Logmen Limited | Manufacturing | 2021 |
| London & Mercia Advisory Limited | Real estate | 2026 |
| Lones (UK) Limited | Wholesale & retail | 2004 |
| Longheadland Limited | Transport & logistics | 2014 |
| Looperman Ltd | Information & communication | 2020 |
| Lord Walker Estates Limited | Real estate | 2025 |
| Lorna Restall Limited | Other services | 2023 |
| LOU Halliday Physiotherapy Limited | Health & social care | 2013 |
| Loubarttech Ltd | Professional & scientific | 2024 |
| Louder Events Limited | Arts & recreation | 2025 |
| Louise Russell Design Ltd | Professional & scientific | 2014 |
| Loupharm Limited | Information & communication | 2025 |
| Lova Group Limited | Real estate | 2023 |
| Lovato (UK) Limited | Extraterritorial | 2011 |
| Lovato Electric Limited | Wholesale & retail | 1991 |
| Love & Lifestyle Ltd | Wholesale & retail | 2024 |
| Love Lane Residents Limited | Households | 2017 |
| Love Madina Ltd | Wholesale & retail | 2026 |
| Love PR & Marketing Limited | Administrative & support | 2010 |
| Love YOU More by Brad Limited | Wholesale & retail | 2026 |
| Loveourtravels Ltd | Administrative & support | 2024 |
| Lowe Accountants Limited | Professional & scientific | 2014 |
| Lowe Risk Management Limited | Wholesale & retail | 2010 |
| Lowethorpe Developments (Maidstone) Ltd | Construction | 2019 |
| Lowethorpe Developments Limited | Construction | 2011 |
| Lowethorpe Limited | Construction | 2021 |
| Lozboutique Ltd | Wholesale & retail | 2018 |
| LP SD Ninety Eight Limited | Wholesale & retail | 2023 |
| LP SD Ninety Limited | Wholesale & retail | 2023 |
| LR Dance Studios Ltd | Arts & recreation | 2025 |
| LR Health Ltd | Health & social care | 2025 |
| LSD Markets Limited | Real estate | 2012 |
| LSD Promotions (Consultancy) Limited | Real estate | 2015 |
| LSD Promotions (Events) Limited | Real estate | 2015 |
| LSD Promotions (Market Place) Limited | Wholesale & retail | 2005 |
| LSD Promotions (Oxford) Ltd | Real estate | 2012 |
| LSD Promotions (Stall Hire) Limited | Real estate | 2015 |
| LSD Promotions (Stratford) Limited | Real estate | 2015 |