| Kryzart Ltd | Extraterritorial | 2007 |
| KSR Digital Ltd | Hospitality | 2018 |
| KTB Allstars Ltd | Education | 2024 |
| Kufic Ltd | Professional & scientific | 2018 |
| Kungoyedzawo Children's Trust | Other services | 2011 |
| Kyoto Motors Ltd | Wholesale & retail | 2026 |
| LA Cantina Meanwood Ltd | Real estate | 2024 |
| LA Dolci Cannoli Ltd | Hospitality | 2025 |
| Labp Products Ltd | Wholesale & retail | 2022 |
| Ladies Only Lounge Ltd | Hospitality | 2025 |
| Laher Catering Limited | Hospitality | 2023 |
| Laher Pharms Ltd | Health & social care | 2017 |
| Laher Travels Ltd | Administrative & support | 2017 |
| Lahori Tawa Ltd | Hospitality | 2025 |
| Lakhi Properties Limited | Real estate | 2024 |
| Lalas the Venue Limited | Hospitality | 2025 |
| Land Ahoy CIC | Arts & recreation | 2024 |
| Laser Detailing Limited | Administrative & support | 2025 |
| Lash Baby Ltd | Wholesale & retail | 2021 |
| Lawrence Beds Ltd | Manufacturing | 2018 |
| Lazenby and Shillito Limited | Construction | 2025 |
| LDB Trading Limited | Wholesale & retail | 2021 |
| LDL Sewing Ltd | Manufacturing | 2024 |
| Learner Driven Adventures Ltd | Administrative & support | 2023 |
| Lease Deals UK Limited | Administrative & support | 2018 |
| Leeds Aircon Solution Ltd | Energy | 2023 |
| Leeds and Cube Resources UK Limited | Construction | 2024 |
| Legend Beds Ltd | Wholesale & retail | 2026 |
| Legends Cafe Batley Limited | Hospitality | 2024 |
| Lejoux Ltd | Wholesale & retail | 2026 |
| Leorusky Pizza Birstall Ltd | Hospitality | 2026 |
| Leslie International Ltd | Wholesale & retail | 2016 |
| LEX Aquila Limited | Real estate | 2024 |
| LG Building Maintenance Ltd | Construction | 2020 |
| LHZ Holdings Limited | Real estate | 2025 |
| Lifeless Fairy Gear Limited | Wholesale & retail | 2023 |
| Lifestyle Upholstery & Interiors Ltd | Manufacturing | 2019 |
| Liftrucs (UK) Limited | Manufacturing | 2004 |
| Lighthuse Properties Limited | Real estate | 2022 |
| Lilibet Manor Ltd | Health & social care | 2023 |
| Lilmo Ltd | Wholesale & retail | 2011 |
| Lily's Nursery Ltd | Education | 2022 |
| Linbrook Assets Limited | Real estate | 2013 |
| Line Management Limited | Professional & scientific | 2015 |
| Little Angels Home Care Services Ltd | Health & social care | 2021 |
| Livingcomfort Bedz Ltd | Manufacturing | 2021 |
| LJB Installations Limited | Construction | 2015 |
| LLB Consultancy Ltd | Professional & scientific | 2014 |
| Local Sparky Ltd | Construction | 2023 |
| Locker Storage - Mirfield Ltd | Transport & logistics | 2025 |
| Locker Storage Ltd | Real estate | 2023 |
| Lodge Brickwork Limited | Construction | 2022 |
| Loft-Homez Limited | Construction | 2025 |
| Logic Online Consulting Ltd | Information & communication | 2020 |
| Logik Cctv Ltd | Administrative & support | 2021 |
| Lohn Properties Ltd | Real estate | 2024 |
| Longfield PMC Ltd | Professional & scientific | 2024 |
| Longlands Care Home (Middlesbrough) Limited | Extraterritorial | 2015 |
| Loonat Catering Services Ltd. | Hospitality | 2009 |
| Loonat Coaches Travel Ltd | Administrative & support | 2007 |
| Lopez Plant Hire Ltd | Administrative & support | 2019 |
| Lorimar Embroidery and Print Ltd | Wholesale & retail | 2015 |
| Louise Heaton Ltd | Other services | 2021 |
| Lovely Things Ltd | Information & communication | 2025 |
| LOW Kost Motor Spares Ltd | Wholesale & retail | 2013 |
| Lowoodlane Fastfood Ltd | Hospitality | 2026 |
| LS Davison Ltd | Real estate | 2025 |
| LS UK Consultants Ltd | Professional & scientific | 2015 |
| Lubna PVT Limited | Health & social care | 2017 |
| Lukad Ltd | Transport & logistics | 2026 |
| Lulawáve Ltd | Wholesale & retail | 2025 |
| Lunar Beds Ltd | Wholesale & retail | 2019 |
| Lunar Financial Ltd | Professional & scientific | 2024 |
| Lureva Ltd | Wholesale & retail | 2026 |
| Lusso Beds Ltd | Wholesale & retail | 2025 |
| Luxe Beauty Clinic Ltd | Other services | 2025 |
| Luxe Living Beds Ltd | Manufacturing | 2023 |
| Luxe Mini Travel Ltd | Transport & logistics | 2026 |
| Luxerest Beds Ltd | Manufacturing | 2026 |
| Luxeza Ltd | Wholesale & retail | 2026 |
| Luxurious Beds Limited | Manufacturing | 2019 |
| Luxurious Beds Online Limited | Wholesale & retail | 2021 |
| Luxury BED (Yorkshire) Company Ltd | Manufacturing | 2022 |
| Luxury BED Store Ltd | Wholesale & retail | 2025 |
| Luxury Beds Direct Ltd | Wholesale & retail | 2025 |
| Luxury Deluxe Ltd | Manufacturing | 2025 |
| Luxury Furnishing Yorkshire Ltd | Wholesale & retail | 2019 |
| Luxury Interiors & Furnishings Ltd | Wholesale & retail | 2023 |
| Luxury Upholstery Limited | Manufacturing | 2023 |
| LWC Trading Ltd | Wholesale & retail | 2022 |
| M a Beds Limited | Manufacturing | 2022 |
| M a Electronics Yorkshire Limited | Wholesale & retail | 2023 |
| M a Lambat Limited | Other services | 2018 |
| M Abujazazr Ltd | Hospitality | 2026 |
| M Deen Properties Ltd | Real estate | 2021 |
| M I M Estates Limited | Real estate | 2024 |
| M J Singh Ltd | Administrative & support | 2018 |
| M O M Consultancy Ltd | Professional & scientific | 2020 |
| M S Transport (Birstall) Ltd | Transport & logistics | 2007 |
| M Sport Car Sales Limited | Wholesale & retail | 2026 |