| Clover House Limited | Transport & logistics | 1987 |
| Club Cricket Conference Limited | Arts & recreation | 2013 |
| Complete Restoration Ltd | Administrative & support | 2002 |
| Confidence Through Sport Ltd | Education | 2019 |
| Contract Transport and Supplies Limited | | 1950 |
| Cookie Bidco Limited | Financial services | 2017 |
| Cookie Topco Limited | Financial services | 2017 |
| Coombs Services Limited | Professional & scientific | 2004 |
| Cooper & Burns Ltd | Professional & scientific | 2006 |
| Courseque Training Systems Limited | Education | 2020 |
| Creative Walls & Floors Ltd | Construction | 2006 |
| Crescere Resourcing Limited | Education | 1996 |
| Cressex Embroidery Limited | Wholesale & retail | 2007 |
| CRM Shipping Limited | Extraterritorial | 2003 |
| Crystal Heights UK Limited | Administrative & support | 2007 |
| Crystalword Limited | Professional & scientific | 1994 |
| D S Nationwide Funeral Service Ltd | Other services | 2022 |
| Daniellatino Limited | Transport & logistics | 2025 |
| David Lynn Associates Limited | Professional & scientific | 2005 |
| Deall Limited | Information & communication | 2007 |
| DG Communications Limited | Other services | 2003 |
| DGA Electrical Limited | Construction | 1998 |
| Digby Diverse SFX Limited | Arts & recreation | 2008 |
| Dimension Contracts Limited | | 1986 |
| Dodman Inns Limited | Hospitality | 2007 |
| Dovetail Consulting Ltd | Administrative & support | 2007 |
| Doxarock Ltd | Professional & scientific | 2006 |
| Drake's | | 1998 |
| Draycast Foundries Limited | Manufacturing | 1964 |
| DU Maurier Productions Limited | Arts & recreation | 1957 |
| Dunstable Motor Sales Limited | | 1963 |
| E-Integral Solutions Ltd | Information & communication | 2006 |
| E. Johnson Motor Engineers Limited | Extraterritorial | 2005 |
| ED FOO Ltd | Professional & scientific | 2005 |
| Elevation Promotions Ltd | Wholesale & retail | 2007 |
| Ellete Limited | Professional & scientific | 2006 |
| Ellie Sanderson Bridalwear Limited | Wholesale & retail | 2006 |
| Elvis Roofer Property Care Ltd | Construction | 2024 |
| Empire Exchange Limited | Wholesale & retail | 2024 |
| Endeavour Woodland Weddings Limited | Arts & recreation | 2023 |
| Energen Ltd. | Professional & scientific | 1988 |
| Energizer Europe Limited | Manufacturing | 2018 |
| England Brothers Limited | Construction | 1993 |
| Estella Holdings Limited | Wholesale & retail | 2006 |
| Eternal Rock Limited | Health & social care | 2023 |
| Etherington Transport Limited | | 1979 |
| Euram Chemicals Limited | Manufacturing | 1986 |
| Excellent Builders Limited | | 1981 |
| Exclusive Countryside Retreats Limited | Real estate | 2002 |
| Exposure (UK) Limited | | 1988 |
| EZI PC Limited | Information & communication | 2004 |
| F.Honour & Sons Limited | Construction | 1957 |
| Fairlie Reid Limited | Professional & scientific | 2007 |
| Family Focused Case Management Limited | Other services | 2007 |
| Farnham Common Nurseries Limited | Wholesale & retail | 1986 |
| Fastlane Leasing Limited | | 1987 |
| Fendgold Limited | | 1984 |
| Flowerama Limited | Wholesale & retail | 2003 |
| Foam Engineers Limited | Manufacturing | 1965 |
| Foampackaging | | 2000 |
| FOODS4U Limited | Wholesale & retail | 2004 |
| Force One Air Conditioning Limited | Construction | 2003 |
| Freeform Graphics Limited | Professional & scientific | 1987 |
| G & L Tompkins Ltd | Construction | 2007 |
| G.H.Dean(Marlow)Limited | Hospitality | 1933 |
| Gaisford House Limited | Households | 2005 |
| Gasper Management Limited | Real estate | 1973 |
| Gems Fire Protection and Security Services Limited | | 1984 |
| Gill Wales (Hughenden Valley) Limited | Professional & scientific | 1989 |
| Girls' Education Company,Limited | Education | 1896 |
| Globewide Transport Limited | | 1985 |
| Good Aviation Limited | Education | 2006 |
| Good Retail Limited | Transport & logistics | 1987 |
| Good Workmanship Limited | Professional & scientific | 2001 |
| Gooseday Ltd | Health & social care | 2011 |
| Gordon Russell Furniture Limited | Professional & scientific | 1964 |
| Grant Castings Limited | Manufacturing | 1961 |
| Greylands Studio Limited | Professional & scientific | 1989 |
| Grouse & ALE Limited | Extraterritorial | 2009 |
| Gulfex Medical & Scientific Limited | Professional & scientific | 1977 |
| H-Four Marketing Limited | | 1988 |
| H.T. Purser Limited | Wholesale & retail | 1973 |
| Hardmead Limited | Professional & scientific | 2005 |
| Hatfish Music Limited | Information & communication | 1996 |
| Headington Holdings Limited | Financial services | 2024 |
| Headstrong Consultants Limited | Administrative & support | 2007 |
| Headtime Limited | Professional & scientific | 1996 |
| Healing Hands Therapy Limited | Other services | 2007 |
| Heavenly Bites Consultants Ltd. | Hospitality | 2025 |
| Hedley Feast Limited | Information & communication | 2002 |
| Hermons Garage Limited | Wholesale & retail | 2007 |
| Hess Automation Limited | Administrative & support | 2005 |
| Hidden Beauty Aylesbury Ltd. | Other services | 2005 |
| Holmer Green Double Glazing Limited | Construction | 2003 |
| Home Counties Sewing Machines Limited | Other services | 1980 |
| Homeace Limited | Households | 1984 |
| House of Binta Ltd | Extraterritorial | 2005 |
| Hrhq Ltd | Other services | 2017 |
| HS Sall Limited | Health & social care | 2007 |
| Hudson Conway (Milton Keynes) Ltd | Professional & scientific | 2006 |