| LA Vita Nova Limited | Health & social care | 2011 |
| Laleye Physiotherapy Ltd | Health & social care | 2025 |
| LAR Consultants Ltd | Information & communication | 2024 |
| Lathwells Ltd | Professional & scientific | 2024 |
| Lavi Computers Limited | Information & communication | 1994 |
| Level Force Limited | Administrative & support | 2025 |
| Little Labels Limited | Extraterritorial | 2020 |
| LJ Ecom Ltd | Wholesale & retail | 2022 |
| LMM Consultancy Services Limited | Administrative & support | 2025 |
| Local Spark Ltd | Wholesale & retail | 2019 |
| Logic Financial Services Ltd | Financial services | 2013 |
| Logic Mortgage Services Ltd | Financial services | 2025 |
| Logic Properties and Investments Ltd | Real estate | 2025 |
| Logician Limited | Professional & scientific | 1996 |
| Loic Consultants Ltd | Professional & scientific | 2025 |
| London & Metropolitan Bloodstock Limited | Agriculture & fishing | 2017 |
| London & Metropolitan International (Holdings) Limited | Professional & scientific | 1999 |
| London & Metropolitan International Developments Limited | Real estate | 1989 |
| London & Metropolitan International Limited | Real estate | 1999 |
| LP Bryant Props Limited | Information & communication | 2013 |
| Luna Diam Ltd | Manufacturing | 2021 |
| M L Hamilton Ltd | Professional & scientific | 2019 |
| Macrae Consulting Limited | Professional & scientific | 2003 |
| Made by Mark Ltd | Hospitality | 2021 |
| Maison ILA Ltd | Wholesale & retail | 2025 |
| Managemycare Ltd | Professional & scientific | 2012 |
| Manor Close (Lewknor) Management Company Limited | Households | 2019 |
| Marcus Richardson Ltd. | Administrative & support | 2005 |
| Marlbrook Media Ltd | Information & communication | 2015 |
| Matkin Scott Advisory Ltd | Professional & scientific | 2026 |
| Matri Manufacturing Limited | Wholesale & retail | 2017 |
| Maxx Wealth Holdings Limited | Real estate | 2024 |
| Middlesex Investments Ltd | Real estate | 2014 |
| Mimosa Design Limited | Professional & scientific | 2021 |
| Mimosa Design Studio Limited | Professional & scientific | 2024 |
| MLS Demesne Limited | Administrative & support | 2013 |
| Model Farm Limited | Real estate | 2020 |
| Mothers Beauty Ltd | Wholesale & retail | 2024 |
| MUD HUT Holdings Limited | Real estate | 2020 |
| MUD HUT Management Limited | Real estate | 2010 |
| Music & Travel Tour Consultants Limited | Administrative & support | 2001 |
| My Anthropocene Ltd | Wholesale & retail | 2019 |
| My Exhibition Space Ltd | Manufacturing | 2019 |
| Neil's Woodlands LLP | | 2013 |
| Newminster Pedigrees Limited | Information & communication | 2000 |
| Nice Cars 4U Ltd | Wholesale & retail | 2026 |
| NISSI7 Ltd | Wholesale & retail | 2020 |
| Obstgarten Limited | Agriculture & fishing | 2014 |
| Ocat Cloud Apps Limited | Information & communication | 2008 |
| Olivia DE Souza Limited | Real estate | 2022 |
| Omega X Systems Limited | Professional & scientific | 1999 |
| Oodles Training Ltd | Arts & recreation | 2013 |
| OPS Property Limited | Construction | 2017 |
| Orange Street Builders Ltd. | Construction | 2018 |
| ORE Golf Ltd | Wholesale & retail | 2019 |
| Orpyandco Ltd | Professional & scientific | 2025 |
| Ottetto Limited | Professional & scientific | 2024 |
| OVL Group Limited | Administrative & support | 1991 |
| OX Club Ltd | Hospitality | 2023 |
| Oxaesthetics Limited | Health & social care | 2023 |
| Oxford Energy Limited | Other services | 2018 |
| Oxford Export Services Limited | Wholesale & retail | 1989 |
| Oxford Hearing and Balance Ltd | Wholesale & retail | 2020 |
| Oxford International Education Centre Limited | Extraterritorial | 2015 |
| Oxfordshire ENT Ltd | Health & social care | 2012 |
| Oxfordshire Pies Ltd | Manufacturing | 2025 |
| Parker & Masters LLP | | 2023 |
| Paterson Services Limited | Professional & scientific | 2020 |
| Pendreic Research Ltd | Information & communication | 2024 |
| Peveril Communications Limited | Financial services | 1984 |
| Phase Leadership Ltd | Professional & scientific | 2026 |
| Philanthropy Solutions Ltd | Professional & scientific | 2023 |
| Pinewood Accountancy Ltd | Professional & scientific | 2018 |
| Pinnacle Tooling Limited | Manufacturing | 1991 |
| Pitman Executive Solutions Limited | Professional & scientific | 2010 |
| Planet Friendly Products Ltd | Wholesale & retail | 2003 |
| Poppington | Other services | 2019 |
| Port Heights Ltd | Wholesale & retail | 2026 |
| Powermount Electrical Contractors Limited | Construction | 2004 |
| Primefex Ltd | Real estate | 2022 |
| Production Process Solutions Ltd | Manufacturing | 2017 |
| Propell Marketing Ltd | Professional & scientific | 2024 |
| Pyrton Manor Farms Limited | Agriculture & fishing | 2019 |
| Q Logistics (HW) Ltd | Transport & logistics | 2010 |
| Qsalt Limited | Wholesale & retail | 2010 |
| Queensgate Residential Limited | Real estate | 2002 |
| Querns Investments Limited | Financial services | 2017 |
| Qway Solutions Ltd | Professional & scientific | 2022 |
| R Watson Enterprises Limited | Wholesale & retail | 2016 |
| Raadan Ltd | Real estate | 2021 |
| Rado Chauffeurs Ltd | Transport & logistics | 2019 |
| Rafa Holdings Limited | Real estate | 2021 |
| Raffles Place Apartments Limited | Real estate | 2016 |
| Range Free Kitchen Ltd | Hospitality | 2012 |
| Ravenscroft Coaching Ltd | Education | 2021 |
| Ravenscroft Sports Academy Ltd | Other services | 2014 |
| Rebevid Ltd | Real estate | 2021 |
| Red Kite Installations Ltd. | Construction | 2011 |
| Reutilize Ltd | Other services | 2023 |
| RFA Security Services Ltd | Administrative & support | 2009 |