| 2AM Investments Ltd | Real estate | 2018 |
| 2AR Limited | Hospitality | 2026 |
| 2ARO Ltd | Information & communication | 2026 |
| 2IU Constructions Ltd | Construction | 2019 |
| 2JC Plumbing & Heating Limited | Construction | 2021 |
| 2K Property Holdings Ltd | Real estate | 2024 |
| 2MPJ Transport Ltd | Transport & logistics | 2019 |
| 2N Healthcare Ltd | Professional & scientific | 2022 |
| 2Q Group Ltd | Administrative & support | 2025 |
| 2RM Limited | Wholesale & retail | 2013 |
| 3 Beans Consulting Ltd | Information & communication | 2024 |
| 3 Counties Mortgage Services Limited | Administrative & support | 2003 |
| 3 EM Limited | Wholesale & retail | 2014 |
| 3 RSN (UK) Limited | Real estate | 2020 |
| 3 Way Components Ltd. | Administrative & support | 2014 |
| 3.18 Ltd | Administrative & support | 2017 |
| 30 Clarendon Road RTM Company Limited | Households | 2023 |
| 31/33, Crescent Road (Luton) Residents Association Limited | Administrative & support | 1970 |
| 313 Automotive Group Ltd | Wholesale & retail | 2025 |
| 313 Brands Ltd | Hospitality | 2026 |
| 313 Consulting Ltd | Information & communication | 2015 |
| 314 Estates Ltd | Real estate | 2025 |
| 32 Reginald Ltd | Households | 2021 |
| 33 RPM Limited | Manufacturing | 1994 |
| 330GZ Ltd | Wholesale & retail | 2026 |
| 360 Security Limited | Administrative & support | 2022 |
| 365 Childcare Ltd | Health & social care | 2025 |
| 365 Childminding Ltd | Education | 2013 |
| 365 Homecare Services Ltd | Health & social care | 2025 |
| 365 PCO Hire Ltd | Administrative & support | 2021 |
| 37 Stockwood Crescent Freehold Company Limited | Households | 2020 |
| 37 Stockwood Crescent RTM Company Limited | Households | 2019 |
| 3880 Group Ltd | Information & communication | 2025 |
| 3D Games Ltd | Wholesale & retail | 2018 |
| 3D Tact Ltd | Manufacturing | 2025 |
| 3DELTA Limited | Information & communication | 2018 |
| 3JV Holdings Ltd | Financial services | 2024 |
| 3M Construction Services Ltd | Construction | 2016 |
| 3M Motors Ltd | Wholesale & retail | 2021 |
| 3PREREFURBISHMENT Limited | Construction | 2023 |
| 3ROTHER’S Meat Products Ltd | Manufacturing | 2021 |
| 3X Sports Limited | Wholesale & retail | 2015 |
| 3Y3KAY Limited | Extraterritorial | 2012 |
| 4 Beta Investment Ltd | Financial services | 2019 |
| 4 Hire Limited | Transport & logistics | 2019 |
| 4 Seasons 4 YOU Ltd | Administrative & support | 2022 |
| 4 Wheel Motors Limited | Wholesale & retail | 2019 |
| 4 YOU Unisex Hair Stylist Ltd | Other services | 2019 |
| 447 Properties Ltd | Real estate | 2019 |
| 47BUSINESS Limited | Transport & logistics | 2019 |
| 47LOGISTICS Limited | Transport & logistics | 2015 |
| 4A Holdings Ltd | Financial services | 2024 |
| 4BROZ Limited | Wholesale & retail | 2024 |
| 4C Project Management Ltd | Information & communication | 2014 |
| 4CM Limited | Professional & scientific | 2011 |
| 4KHM Solutions Ltd | Wholesale & retail | 2021 |
| 4M Team Limited | Transport & logistics | 2023 |
| 4MATIC Contract Services Ltd | Wholesale & retail | 2019 |
| 4MS Services Ltd | Other services | 2017 |
| 4P'S Generix Ltd | Health & social care | 2022 |
| 4PEOPLE Care Services Ltd | Health & social care | 2024 |
| 4PROPERTIES Ltd | Hospitality | 2023 |
| 4T Healthcare Services Ltd | Health & social care | 2020 |
| 4U Valeting Supplies Limited | Other services | 2012 |
| 5 Akhis ST. Albans Ltd | Hospitality | 2025 |
| 5 BRO Couriers Ltd | Transport & logistics | 2025 |
| 5 Lions Consortium Limited | Professional & scientific | 2025 |
| 5 Plus Travel Limited | Transport & logistics | 2019 |
| 5 Star Clothes Limited | Wholesale & retail | 2025 |
| 5 Star Driveways & Patios Limited | Construction | 2012 |
| 5 Star Linen Hire Ltd | Other services | 2024 |
| 5 Star Luton Car Detailing Ltd | Other services | 2023 |
| 5 Star Roofing (London) Ltd | Construction | 2020 |
| 501 International Ltd | Health & social care | 2024 |
| 51 Padgate Lane Propco Ltd | Real estate | 2025 |
| 542M Limited | Real estate | 2025 |
| 55-57 Archel Road Limited | Households | 2016 |
| 592 Link Ltd | Transport & logistics | 2026 |
| 5AB Services Limited | Transport & logistics | 2020 |
| 5APART Limited | Real estate | 2015 |
| 5BROS Couriers Ltd | Transport & logistics | 2024 |
| 5IVEKEYS Ltd | Administrative & support | 2025 |
| 5N6 Ltd | Information & communication | 2026 |
| 5STAR Aviation Limited | Wholesale & retail | 2025 |
| 5Y3D Property Limited | Real estate | 2025 |
| 5Y3D Trading Limited | Wholesale & retail | 2020 |
| 633 Media Ltd | Professional & scientific | 2016 |
| 65WR Limited | Construction | 2025 |
| 6SENCEPROPERTY Ltd | Real estate | 2025 |
| 7 Days Euro Market Luton Ltd | Wholesale & retail | 2020 |
| 7 Hills Constructions Ltd | Construction | 2019 |
| 7 Icknield Street (RTM Company) Limited | Households | 2014 |
| 7 Plus Consultancy Ltd | Information & communication | 2014 |
| 7 Plus Travel Ltd | Transport & logistics | 2013 |
| 70 One Investment Ltd | Hospitality | 2021 |
| 75 Ladbroke Grove Limited | Professional & scientific | 2006 |
| 75 Tennyson Road Luton Limited | Extraterritorial | 2009 |
| 78 Hastings Street Luton Management Company Limited | Real estate | 2006 |
| 786 Landmark Security Ltd | Administrative & support | 2024 |
| 787 Properties Ltd | Real estate | 2020 |