| 30DV Limited | Real estate | 2026 |
| 40-43 Sedley Grove Management Limited | Extraterritorial | 2012 |
| A & M Investments (Ruislip) Limited | Real estate | 2013 |
| Abbey Electrics Limited | Construction | 1997 |
| ACN Technologies Limited | Administrative & support | 2017 |
| Affinity Analysis Consulting Ltd | Information & communication | 2022 |
| Air Freight Transport Limited | Transport & logistics | 2003 |
| Amja Properties Limited | Real estate | 2021 |
| Anakhe Ltd | Professional & scientific | 2024 |
| Andrew Turner & Co Limited | Professional & scientific | 2014 |
| Arcadia at Church Gardens Limited | Hospitality | 2023 |
| ARK Promotions Limited | Administrative & support | 2021 |
| Ashaki (UK) Limited | Wholesale & retail | 1998 |
| B.D.C. Drainage Clearance and Maintenance Ltd | Water & waste | 2016 |
| Baby Swimming Berkshire LLP | | 2014 |
| Bar One Events Limited | Wholesale & retail | 2021 |
| Barts the Builders Ltd | Construction | 2024 |
| Becker Developments Limited | Construction | 2018 |
| Betta Properties Ltd | Real estate | 2018 |
| Birds & Animals UK Ltd. | Arts & recreation | 2000 |
| BJB Oakfield Properties Limited | Professional & scientific | 2004 |
| Black Velvet Entertainment Ltd | Arts & recreation | 2018 |
| Blue Dice Solutions Limited | Construction | 2012 |
| Blue Edge IT Consulting Ltd | Information & communication | 2022 |
| Brad Brookes Limited | Information & communication | 2024 |
| Brandeston Properties Limited | Real estate | 2004 |
| Breakspear House Limited | Households | 2021 |
| Breconby Limited | Real estate | 2014 |
| Brendon’S Property Group Limited | Real estate | 2020 |
| Bricks and Bricks Limited | Real estate | 2019 |
| Cabfusion Limited | Financial services | 2023 |
| Carbella Rose Ltd | Wholesale & retail | 2025 |
| CH Pharma Ltd | Health & social care | 2020 |
| Chavda Photography Ltd. | Professional & scientific | 2008 |
| CHF Services Ltd | Other services | 2026 |
| Chiltern Mews Management Company Ltd | Households | 2020 |
| Claimont (UK) Limited | Health & social care | 2020 |
| Claimont Health Ltd | Health & social care | 2012 |
| Claimont Pharma Ltd | Professional & scientific | 2020 |
| Clone Valley Consultancy Ltd | Professional & scientific | 2024 |
| Colne Valley Baits Ltd | Wholesale & retail | 2009 |
| Colney Farm Barns (2011) Ltd | Other services | 2011 |
| Compact Bodyshop Limited | Wholesale & retail | 2008 |
| Coppermill Building Construction Ltd | Construction | 2010 |
| Cordic Technology Limited | Information & communication | 2021 |
| Crazy Tails Retreat Ltd | Other services | 2024 |
| D P Redmond & SON Limited | Professional & scientific | 2018 |
| Danel Pharma Limited | Health & social care | 2024 |
| Danel Trading Limited | Wholesale & retail | 1986 |
| Dinler Investments Ltd | Real estate | 2017 |
| DNA Leisure Holdings Limited | Financial services | 2019 |
| DNA Leisure Ltd | Wholesale & retail | 2012 |
| Doyles Steam Cleaning Limited | Professional & scientific | 1999 |
| Econation Ltd | Wholesale & retail | 2022 |
| Education in Action Limited | Other services | 2018 |
| EL Palo Holdings Limited | Professional & scientific | 2013 |
| Emotio Design Group Limited | Information & communication | 2009 |
| Engaging Performance Ltd | Professional & scientific | 2011 |
| Envirotec Services Ltd | Real estate | 2000 |
| ESI Executive Search UK Limited | Administrative & support | 2014 |
| Executives Association of Great Britain Ltd(The) | Other services | 1930 |
| Fisiner Ltd | Hospitality | 2009 |
| Flomo Services Ltd | Construction | 2023 |
| Fortified Global Ltd | Manufacturing | 2025 |
| Forward Facilitation Limited | Other services | 2016 |
| Garden Things Limited | Manufacturing | 2016 |
| Grand Spec Homes Limited | Construction | 2012 |
| Grundon Waste Food Products Limited | Mining & quarrying | 1956 |
| Hannah Elizabeth Interiors Ltd | Professional & scientific | 2022 |
| Harefield Investments Ltd | Administrative & support | 2022 |
| Harefield Opticians Limited | Wholesale & retail | 2014 |
| Harefield Tackle Limited | Wholesale & retail | 2002 |
| Harefield Village Cafe Ltd | Hospitality | 2009 |
| Helix Technology Solutions Ltd | Information & communication | 2023 |
| Highacre Capital Ltd | Financial services | 2021 |
| Home Plans Ltd | Professional & scientific | 2009 |
| ICS Investments Ltd | Professional & scientific | 2019 |
| Iprotec Limited | Professional & scientific | 2006 |
| Jake the Rake Services Ltd | Administrative & support | 2025 |
| K & P News Limited | Wholesale & retail | 2011 |
| Kjad Solutions Limited | Professional & scientific | 2018 |
| Knighthood Properties Limited | Real estate | 2007 |
| L.B. Interiors Limited | Construction | 1994 |
| Lamaa and Company III Limited | Hospitality | 2024 |
| Lamaa and Company IV Limited | Hospitality | 2024 |
| Lamaa and Company V Limited | Hospitality | 2024 |
| Lamaa and Company VI Limited | Hospitality | 2025 |
| LC Electrical Installations Ltd | Construction | 2020 |
| Leghorn Investments Limited | Construction | 2025 |
| LOAN2INVEST Limited | Financial services | 2019 |
| M.J. Musk Marine Sales (Harefield) Limited | Transport & logistics | 1985 |
| Mahal Ltd | Real estate | 2025 |
| Mandala Centre Limited | Other services | 2001 |
| Markatplace Ltd | Wholesale & retail | 2025 |
| Matelect Limited | Manufacturing | 1982 |
| Me-Mo Media Ltd | Professional & scientific | 2011 |
| Melinda Building Services Limited | Construction | 2010 |
| Melinda Construction Limited | Real estate | 2008 |
| Melinda Property Investments 1 Limited | Real estate | 2011 |
| Melinda Property Pinner Ltd | Real estate | 2023 |