| 247 Taxi Line Limited | Transport & logistics | 2018 |
| 247TAPVUE Limited | Information & communication | 2021 |
| 24HR Swift Care Services Ltd | Health & social care | 2018 |
| 24K Systems Ltd | Professional & scientific | 2024 |
| 24SEVEN Care Solutions Ltd | Health & social care | 2024 |
| 25 Brondesbury Road Limited | Households | 2000 |
| 254 Nurses Agency Limited | Professional & scientific | 2015 |
| 25TH Couriers Ltd | Wholesale & retail | 2016 |
| 26 Glasshouse Limited | Administrative & support | 2022 |
| 29 Addison Gardens Management Limited | Households | 2008 |
| 29 Buckland Crescent Management Company Limited | Professional & scientific | 1977 |
| 2AND2 Print Limited | Manufacturing | 2019 |
| 2B&C Logistics Ltd | Transport & logistics | 2022 |
| 2BOX Wholesale Limited | Wholesale & retail | 2025 |
| 2H Transport Ltd | Transport & logistics | 2025 |
| 2J Creatives Limited | Information & communication | 2010 |
| 2J Group Ltd | Hospitality | 2022 |
| 2K4 Consulting Ltd | Professional & scientific | 2013 |
| 2NCH Limited | Information & communication | 2010 |
| 2NINE Investments Ltd | Real estate | 2023 |
| 2RS Electrical Maintenance Ltd | Construction | 2026 |
| 2SPC Mansfield Ltd | Construction | 2022 |
| 3 C + 1 Limited | Professional & scientific | 2001 |
| 3 CCI | Financial services | 2021 |
| 3 Cliff Tech Ltd | Real estate | 2021 |
| 3 Kingswood Management | Real estate | 2026 |
| 3 Pillars Conditioning Ltd | Other services | 2019 |
| 30 Coningsby Road Management Company Ltd | Real estate | 2016 |
| 318 Route Ltd | Information & communication | 2024 |
| 31U Limited | Wholesale & retail | 2017 |
| 32 Caxton Road Limited | Real estate | 2024 |
| 325 Global Services Limited | Information & communication | 2024 |
| 32HR Freehold Limited | Real estate | 2026 |
| 33 Pember Road Limited | Real estate | 2000 |
| 335 Transport Ltd | Transport & logistics | 2025 |
| 33CONCEPT Ltd | Information & communication | 2010 |
| 33MDR Ltd | Construction | 2015 |
| 355 Investment Group Limited | Financial services | 2025 |
| 360 GFX Ltd | Information & communication | 2019 |
| 360 Hair and Scalp Ltd | Other services | 2024 |
| 360 Play (Basildon) Limited | Arts & recreation | 2013 |
| 360 Play (Birmingham) Limited | Arts & recreation | 2026 |
| 360 Play (Farnborough) Limited | Arts & recreation | 2017 |
| 360 Play (Leicester) Limited | Arts & recreation | 2012 |
| 360 Play (Milton Keynes) Limited | Arts & recreation | 2013 |
| 360 Play (Redditch) Limited | Arts & recreation | 2016 |
| 360 Play (Rushden Lakes) Limited | Arts & recreation | 2016 |
| 360 Play (Stevenage) Limited | Arts & recreation | 2010 |
| 360 Pro Limited | Construction | 2019 |
| 360 Retail Advisory Limited | Professional & scientific | 2020 |
| 360 Social Care Limited | Information & communication | 2020 |
| 360 Wild (Spalding) Limited | Arts & recreation | 2026 |
| 365 Dynamics Group Limited | Information & communication | 2019 |
| 365 Funding Ltd | Financial services | 2020 |
| 365 IT Limited | Information & communication | 2019 |
| 365SERVICESMK Ltd | Construction | 2023 |
| 366 Electrical Concepts Ltd | Construction | 2018 |
| 38 ST. Stephen's Gardens (Management) Limited | Households | 1975 |
| 380 Motors MK Ltd | Wholesale & retail | 2023 |
| 392 Ltd | Real estate | 2021 |
| 3A Properties Limited | Real estate | 2023 |
| 3C Design Partnership Limited | Professional & scientific | 2004 |
| 3CHA Ltd | Real estate | 2013 |
| 3CIX Ltd | Construction | 2021 |
| 3CTOOLS Ltd | Wholesale & retail | 2023 |
| 3D Genie Designs Ltd | Wholesale & retail | 2026 |
| 3D Portal Limited | Manufacturing | 2023 |
| 3D Something Ltd | Manufacturing | 2025 |
| 3D Technical Design Limited | Professional & scientific | 1992 |
| 3D-OSCOPY Ltd | Professional & scientific | 2017 |
| 3DP Ltd | Manufacturing | 2019 |
| 3DSPRINT Ltd | Manufacturing | 2024 |
| 3DTD Holdings Limited | Financial services | 2019 |
| 3E Consulting Ltd | Professional & scientific | 2026 |
| 3E Print Limited | Professional & scientific | 2013 |
| 3EDES Limited | Professional & scientific | 2023 |
| 3FIVESIX Property Solutions Ltd | Real estate | 2021 |
| 3FRC Limited | Public administration | 2023 |
| 3ICONVERGENCE Solutions Limited | Information & communication | 2011 |
| 3MI Consultancy Limited | Information & communication | 2018 |
| 3MOS Consulting Ltd | Manufacturing | 2020 |
| 3MS Pharma Limited | Wholesale & retail | 2023 |
| 3N Soft Limited | Information & communication | 2020 |
| 3R Knowledge Consulting Ltd | Other services | 2014 |
| 3SKH Limited | Financial services | 2025 |
| 3STAX Express Ltd | Hospitality | 2026 |
| 3STAX Ltd | Hospitality | 2025 |
| 3TRIPLE TTT Ltd | Wholesale & retail | 2022 |
| 3VS HP Ltd | Health & social care | 2023 |
| 3WE Limited | Health & social care | 2019 |
| 3XER Ltd | Wholesale & retail | 2023 |
| 4 Absolute Eco Construction Limited | Construction | 2016 |
| 4 Concrete Ltd | Manufacturing | 2016 |
| 4 Lions Cricket Academy Ltd | Arts & recreation | 2018 |
| 4 Sides Construction Ltd | Construction | 2020 |
| 4-STUDENTS Ltd | Education | 2024 |
| 40 Tolc Fish Ltd | Administrative & support | 2019 |
| 41 BPG (RTM) Company Limited | Households | 2011 |
| 41 BPG Limited | Households | 2010 |
| 41 Cavendish Road (Freehold) Limited | Households | 2006 |