| Liberty Leisure Group Ltd | Hospitality | 2018 |
| Libertyloving Limited | Administrative & support | 2025 |
| Licc Gelato Limited | Wholesale & retail | 2025 |
| Life Film Limited | Information & communication | 2022 |
| Life Size Studio Limited | Manufacturing | 2024 |
| Lifeplot Ltd | Health & social care | 2025 |
| Lifequote Limited | Administrative & support | 1998 |
| Lifesmiles Limited | Health & social care | 2024 |
| Lifestyle Policy Limited | Other services | 1980 |
| Liftshare Parking Limited | Extraterritorial | 2010 |
| Liftx Wind Limited | Professional & scientific | 2024 |
| Light Lantern Limited | Professional & scientific | 2012 |
| Lightbrook Limited | Real estate | 1992 |
| Lightfoot Inns Limited | Hospitality | 2003 |
| Lighthouse CPS Ltd | Wholesale & retail | 2012 |
| Lighthouse Transitions Ltd | Professional & scientific | 2019 |
| Lightly & Lightly Limited | Professional & scientific | 2003 |
| Lightly & Lightly Management Services Limited | Real estate | 1989 |
| Lightning Transport Group Limited | Transport & logistics | 1998 |
| Lightning Tree Consulting Group Ltd | Professional & scientific | 2026 |
| Lightowler Engineering Limited | Professional & scientific | 2013 |
| Lightscape Design Ltd | Professional & scientific | 2002 |
| Like Father Like SON Apparel Ltd | Wholesale & retail | 2014 |
| Lil's Bar and Bistro (York) Limited | Hospitality | 2016 |
| Lil's on the Waterfront (York) Limited | Hospitality | 2016 |
| Lilac Tree Designs Ltd | Wholesale & retail | 2024 |
| Liley Property Ltd | Real estate | 2025 |
| Liliput Day Nursery (York) Limited | Health & social care | 2012 |
| Lilley's Fitness Limited | Education | 2018 |
| Lillywhite Consultancy Limited | Professional & scientific | 2019 |
| Lily PAD Properties Ltd | Hospitality | 2025 |
| Lilypad (Pocklington) Limited | Wholesale & retail | 2014 |
| Lima Unimog Ltd | Construction | 2022 |
| Lime Associates Limited | Financial services | 2009 |
| Lime Kiln Farm Pet Services Limited | Extraterritorial | 2017 |
| Lime Kiln Pet Crematorium Limited | Extraterritorial | 2017 |
| Lime Tree Court (York) Freehold Company Limited | Households | 2024 |
| Lime Tree Court (York) Management Company Limited | Households | 2009 |
| Lime Tree Court Derby Management Company Limited | Households | 2017 |
| Lime Tree Homes Ltd | Construction | 1992 |
| Limebar Limited | Real estate | 2020 |
| Limecoast Limited | Construction | 2009 |
| Limetree Hospitality Limited | Hospitality | 2025 |
| Limewood Accounting Ltd | Professional & scientific | 2012 |
| Limewood Investments Ltd | Construction | 2003 |
| Linchpin Solutions Limited | Professional & scientific | 2025 |
| Lincolnshire Pet Crematorium Limited | Professional & scientific | 2003 |
| Lincroft Property Ltd | Real estate | 2019 |
| Linda Burke Ltd | Professional & scientific | 2008 |
| Lindale Park (Alverthorpe) Management Company Limited | Households | 2016 |
| Linden Lodge Management Limited | Households | 1987 |
| Lindisfarne Management (Jesmond) Limited | Real estate | 2018 |
| Lindley (Yorkshire) Properties Ltd | Real estate | 2022 |
| Lindrew Services Limited | Health & social care | 2025 |
| Lindsey Sherman & Associates Limited | Professional & scientific | 2009 |
| Lindum Seeded Turf Limited | Agriculture & fishing | 1989 |
| Linear Financial Services Holdings Limited | Financial services | 2005 |
| Linear Mortgage Network Holdings Limited | Financial services | 2003 |
| Linear Mortgage Network Limited | Financial services | 2004 |
| Linear Wealth Management Limited | Financial services | 2003 |
| Lineload Holdings Limited | Financial services | 2025 |
| Linfoot Construction Ltd | Construction | 2025 |
| Lingfield Meadows (Houghton) Management Company Limited | Real estate | 2014 |
| Link Architecture Limited | Professional & scientific | 2022 |
| Linkcove Limited | Professional & scientific | 2014 |
| Links Allen Limited | Administrative & support | 2024 |
| Linkway Properties Limited | Extraterritorial | 1990 |
| Linley Properties (Yorkshire) Limited | Construction | 2018 |
| Linnco Group Limited | Financial services | 2024 |
| Linthorpe Leisure M & D Ltd | Hospitality | 2019 |
| Linton Woods Estate Management Company Limited | Health & social care | 1997 |
| Linton Woods Landscapes Limited | Transport & logistics | 2017 |
| Linyu Kitchen Ltd | Hospitality | 2025 |
| Linzian Ltd | Hospitality | 2018 |
| Lionbird Venture Ltd | Hospitality | 2025 |
| Lionel A.Winder Limited | Wholesale & retail | 1948 |
| Lionheart Property Management Limited | Real estate | 2016 |
| Liphook Equine Hospital Limited | Professional & scientific | 2016 |
| Liquid Indulgence Ltd | Wholesale & retail | 2010 |
| Liquid Noise Films Ltd | Extraterritorial | 2010 |
| Liquid Noise Limited | Information & communication | 2014 |
| Liquid Noise Productions Ltd | Arts & recreation | 2024 |
| Lisa Clifford Limited | Professional & scientific | 2013 |
| Lisa Willcox Solutions Limited | Professional & scientific | 2024 |
| Lissett Furniture Limited | Manufacturing | 2000 |
| Lissett Holiday Homes Limited | Manufacturing | 2000 |
| Lissett Homes Limited | Administrative & support | 2000 |
| Lissett Leisure Homes Ltd | Manufacturing | 2005 |
| Lissett Park Homes Limited | Manufacturing | 2000 |
| Lissett Pods LLP | | 2012 |
| Lissett Residentials Limited | Construction | 1981 |
| Lister Business Analysis Limited | Administrative & support | 2010 |
| Little Acorns New Earswick Ltd | Health & social care | 2013 |
| Little and Lime Limited | Real estate | 2024 |
| Little Asia York Ltd | Hospitality | 2022 |
| Little Blondie Bakehouse Ltd | Manufacturing | 2022 |
| Little Bugs Childcare Limited | Health & social care | 2021 |
| Little Frog Investments Ltd | Professional & scientific | 2014 |
| Little Insights LLP | | 2019 |
| Little Italy Yorkshire Limited | Hospitality | 2019 |