| Legends Motors Ltd | Wholesale & retail | 2026 |
| Lehane Development Ltd | Education | 2008 |
| Leiston Hydrogen Limited | Administrative & support | 2022 |
| Lejeune Clinic for Children With Down Syndrome | Health & social care | 1996 |
| Lekkii Resources Ltd | Wholesale & retail | 2020 |
| Lemarsh Building Services Limited | Construction | 2004 |
| Lemhill Farms Limited | Agriculture & fishing | 1996 |
| Lemontree Property Improvements Ltd | Construction | 2005 |
| Lendahand Ethex Ltd | Financial services | 2016 |
| Lendahand Ethex Nominee Ltd | Financial services | 2022 |
| Leng Fine Arts Limited | Wholesale & retail | 2023 |
| Lenie Boya Ltd | Manufacturing | 2023 |
| Leno Capital Ltd | Households | 2026 |
| Lens Architects Limited | Professional & scientific | 2024 |
| LEO Catering Oxford Ltd | Hospitality | 2024 |
| LEO Drive Ltd | Transport & logistics | 2026 |
| LEO K Limited | Construction | 2025 |
| Leo's Group Ltd. | Hospitality | 2022 |
| Leonida W1 Limited | Health & social care | 2009 |
| Leopardpress.Com Limited | Information & communication | 2005 |
| Leopold House Management Company Ltd | Households | 2001 |
| Lesinke Enterprise Limited | Transport & logistics | 2015 |
| Lestrade Financial Services Limited | Professional & scientific | 2016 |
| Let's Art Ltd | Education | 2022 |
| Let's Just DO IT Services Ltd | Construction | 2023 |
| Letcombe Court Management Company Limited | Households | 2014 |
| Letcombe House Management Company Limited | Households | 2015 |
| Lether Limited | Real estate | 2020 |
| Lets Oxford Ltd | Hospitality | 2019 |
| Lets Safe LLP | | 2013 |
| Levada Limited | Information & communication | 2010 |
| Leviathan Group Limited | Construction | 2025 |
| Lewin Bioscience Ltd | Professional & scientific | 2024 |
| Lewis Baker Retail Limited | Wholesale & retail | 2005 |
| Lewis Fire & Security Holdco Limited | Professional & scientific | 2008 |
| LEX Navitas Limited | Information & communication | 2024 |
| Lexel Engineering Limited | Manufacturing | 1982 |
| Lexnovus Ltd | Professional & scientific | 2018 |
| Leyland Trucks Limited | Manufacturing | 1993 |
| Leylandii Management Limited | Real estate | 2021 |
| Leys Community Club Limited | Arts & recreation | 2026 |
| Leys Community Development Initiative | Health & social care | 2009 |
| Leys Consultants Limited | Health & social care | 2013 |
| Leys Cricket Club Ltd | Arts & recreation | 2026 |
| Leys Housing Limited | Real estate | 2022 |
| LF Management Limited | Real estate | 2012 |
| LG Shackleton Limited | Construction | 2025 |
| LGL Power Limited | Manufacturing | 2026 |
| LGUA17 Limited | Wholesale & retail | 1959 |
| Liberal Media Limited | Information & communication | 2017 |
| Liberty Tech Limited | Information & communication | 2011 |
| Libmus Ltd | Information & communication | 2018 |
| Libpubmedia Limited | Administrative & support | 2011 |
| Life Design Club Ltd | Administrative & support | 2024 |
| Life Research Oxford Limited | Professional & scientific | 2024 |
| Life's Big Stuff Ltd | Wholesale & retail | 2011 |
| Lifebuild Holdings Ltd | Real estate | 2024 |
| Lifelink Computers Limited | Information & communication | 1991 |
| Lifesnice Ltd | Wholesale & retail | 2016 |
| Lifetime Financial Therapy Limited | Administrative & support | 2008 |
| Lifetouch Systems Ltd | Manufacturing | 2025 |
| Lifts and Sprints Academy CIC | Education | 2025 |
| Lifts and Sprints Limited | Other services | 2018 |
| Light Airs | Financial services | 2024 |
| Light Touch Printing Limited | Professional & scientific | 2015 |
| Lightbox Architects LLP | | 2015 |
| Lighthouse Innovations Ltd | Professional & scientific | 2020 |
| Lighthouse Primary Care Ltd | Health & social care | 2022 |
| Lighthousewitney Outreach Community Interest Company | Hospitality | 2024 |
| Lightricity Limited | Wholesale & retail | 2017 |
| Lightwave Group Ltd | Wholesale & retail | 2024 |
| LIL Rice Enterprises Ltd | Hospitality | 2022 |
| Lilas Project Limited | Construction | 2017 |
| Lilleeng Advisory Limited | Administrative & support | 2024 |
| Lillian REY Developments Ltd | Construction | 2024 |
| Lily (Oxford) Ltd | Hospitality | 2019 |
| Limbeck Holdings Ltd | Construction | 2020 |
| Lime Court Residents Limited | Households | 1992 |
| Lime Walk Farm (Kirtlington) Limited | Agriculture & fishing | 2021 |
| Limelight Safari Africa Limited | Hospitality | 2019 |
| LIMITED007 Limited | Wholesale & retail | 2026 |
| LIN Fast Food Ltd | Hospitality | 2024 |
| Lina Residence Ltd | Hospitality | 2017 |
| Linacre College Developments Limited | Construction | 2023 |
| Linacre College Trading Limited | Administrative & support | 2023 |
| Lincoln College Enterprises Limited | Construction | 1992 |
| Lincoln College Trading Limited | Hospitality | 2008 |
| Lincoln Hollis Brickwork Limited | Construction | 2017 |
| Lincombe Lane Woodland Limited | Real estate | 2012 |
| Linden House (Oxford) Management Company Limited | Households | 2022 |
| Linfield Limited | Construction | 1995 |
| Link Shires Limited | Transport & logistics | 2018 |
| Link@M Ltd | Wholesale & retail | 2025 |
| Linkam Properties Ltd | Real estate | 2025 |
| Linkside Homes Limited | Construction | 2014 |
| Linley Brands Ltd | Professional & scientific | 2025 |
| Linnells Secretarial Services Limited | Professional & scientific | 1997 |
| Lintel Labs Limited | Information & communication | 2026 |
| Lion Therapy CIC | Health & social care | 2025 |
| Lionsfield Limited | Real estate | 2019 |