| Fairshields Limited | Hospitality | 2002 |
| Farah Media Ltd | Professional & scientific | 2024 |
| FH Nominees Limited | Other services | 2023 |
| Find Ampthill Ltd | Wholesale & retail | 2022 |
| Fiona Gray Financial Planning Limited | Administrative & support | 2007 |
| Fiordilatteuk Limited | Hospitality | 2018 |
| Firelight IT Solutions Limited | Information & communication | 2018 |
| FIRST4SPORT Ltd | Arts & recreation | 2012 |
| FK Financial Limited | Financial services | 2004 |
| FKP (2013) Limited | Financial services | 2013 |
| Fluid Infrastructure Limited | Construction | 2016 |
| Fold-A-Box Limited | Manufacturing | 2005 |
| Foot Adapt Solutions Limited | Other services | 2024 |
| Fordfield House Nursery Limited | Education | 2002 |
| Fsktr Limited | Arts & recreation | 2018 |
| Future and Beyond Associate Ltd | Information & communication | 2015 |
| Gavin Sewell Consulting Limited | Information & communication | 2015 |
| GKP (Ampthill) Limited | Professional & scientific | 2013 |
| Gleworks Limited | Real estate | 2005 |
| Global Cyber Consultants Ltd | Information & communication | 2018 |
| Global Ridgeway Holdings Limited | Professional & scientific | 2011 |
| Global Ridgeway Management Limited | Administrative & support | 2012 |
| Grabigail Properties Limited | Real estate | 2018 |
| Great Estate Management Zero Ltd | Professional & scientific | 2025 |
| Green Metric Consulting Limited | Other services | 2025 |
| Gurney Properties Limited | Real estate | 2015 |
| H & W Properties Ltd | Real estate | 2017 |
| Happily Minds Ltd | Education | 2023 |
| Harvey Thomas Limited | Administrative & support | 2009 |
| Hasler Management Services Limited | Information & communication | 2013 |
| Heartwood Carpentry Limited | Manufacturing | 2018 |
| Heayl Limited | Health & social care | 2025 |
| Heritage Park Family Law Limited | Professional & scientific | 2021 |
| HI Honey Ltd | Real estate | 2018 |
| Hispray Solutions Ltd | Construction | 2020 |
| HKS Developments Ltd | Construction | 2023 |
| Hnri Global Limited | Other services | 2022 |
| Home Counties Town Planning Ltd | Professional & scientific | 2020 |
| Home of Finance Ltd | Financial services | 2018 |
| Horse Chestnut Investments Limited | Real estate | 2021 |
| HPS21 Ltd | Financial services | 2022 |
| Hummingbird & Co Services Ltd | Professional & scientific | 2024 |
| IAN Fowler Ltd | Other services | 2018 |
| Independent Fleet Consultants Holdings Limited | Professional & scientific | 2020 |
| Independent Fleet Consultants Limited | Professional & scientific | 2001 |
| Insurance Resource Limited | Professional & scientific | 2005 |
| Integral Property Hub Limited | Real estate | 2020 |
| Intelligent Ideas International Ltd | Information & communication | 2024 |
| Intelligent Ideas Ltd | Information & communication | 2013 |
| ITU Construction Academy Ltd | Financial services | 2025 |
| IVY Lane Interiors Limited | Professional & scientific | 2018 |
| J & M Recycling Limited | Water & waste | 2012 |
| Jedltd Limited | Professional & scientific | 2025 |
| Jessop & Co Ltd | Administrative & support | 2013 |
| Jifh Capital Limited | Other services | 2022 |
| JM Automation & Control Systems Ltd | Professional & scientific | 2019 |
| John & Anna Priest LLP | | 2014 |
| Kapoor Property Hub Limited | Real estate | 2020 |
| Karma Gemstones Limited | Wholesale & retail | 2008 |
| Kartt Limited | Manufacturing | 2015 |
| Kasbia Property Ltd | Real estate | 2019 |
| Kateri Ltd | Health & social care | 2019 |
| Katrine Johnston Consultancy Limited | Professional & scientific | 2011 |
| Kemp Management Group Ltd. | Real estate | 2020 |
| Kgkx Limited | Information & communication | 2014 |
| Kingmind Limited | Households | 1979 |
| Kings Fire Doors Ltd | Public administration | 2022 |
| KKN Legal Limited | Other services | 2020 |
| Klapton Management Limited | Financial services | 2011 |
| KNN Properties Limited | Real estate | 2016 |
| KST Business Finance Limited | Financial services | 2023 |
| Latam Partners Limited | Other services | 2022 |
| Lemann Limited | Real estate | 2020 |
| Lilycharles Limited | Financial services | 2024 |
| LT Home Maintenance Limited | Construction | 2014 |
| M.K. Funding Limited | Financial services | 1989 |
| Magjam Cottages Ltd | Hospitality | 2025 |
| Malo Limited | Administrative & support | 1989 |
| Manipri Holdings Limited | Other services | 2018 |
| Masterford Limited | Manufacturing | 1972 |
| MAW Network Solutions Limited | Administrative & support | 2007 |
| MEP Services Design Limited | Other services | 2018 |
| Mexor Limited | Real estate | 2017 |
| Michael Crouch Estate Agents Limited | Real estate | 1991 |
| Mighty Oak Press Limited | Information & communication | 2010 |
| MK5 (PTY) UK Ltd | Wholesale & retail | 2025 |
| Mokthadir Limited | Real estate | 1971 |
| Morris Resource Economics Ltd | Professional & scientific | 2010 |
| Mortgage Store (Ampthill) Ltd | Other services | 2018 |
| Mossmore Ltd | Professional & scientific | 2002 |
| Newguild Limited | Extraterritorial | 2004 |
| Nicholas Lowe Construction Limited | Construction | 2015 |
| Nick Pinny Autos Limited | Wholesale & retail | 2006 |
| Nightingale P2 Management Company Ltd | Households | 2024 |
| NINETEEN-75 Limited | Professional & scientific | 2007 |
| NMP Investment Holdings Limited | Other services | 2018 |
| NP Property Hub Limited | Real estate | 2021 |
| OAD Consultancy Limited | Real estate | 2020 |
| Old Coach House Management Company Limited(The) | Real estate | 1984 |
| Omnisonic International Limited | Manufacturing | 2007 |