| 33 Entertainment Group Holdings Limited | Maldon | 2025 |
| 33 Green Limited | Dungannon | 2019 |
| 33 M Limited | London | 2002 |
| 33 Mount Pleasant Road Ltd | London | 2022 |
| 33 North Ltd | London | 2023 |
| 33 WR Holdings Ltd | Downham Market | 2019 |
| 330 Grays Inn Road Holdco Limited | London | 2018 |
| 333 Capital Ltd | Croydon | 2025 |
| 333 Investments Ltd | Newton Aycliffe | 2024 |
| 3333 Financial Limited | Enville | 2026 |
| 333H Ltd | Salford | 2013 |
| 336 Financial Management Ltd | Edinburgh | 2011 |
| 337 Group Limited | Kingston Upon Hull | 2020 |
| 33BLACKINVESTMENTS Limited | Leigh-On-Sea | 2025 |
| 33HZ Events Limited | Woking | 2020 |
| 33RH Ltd | Maidenhead | 2026 |
| 34 Group Ltd | London | 2025 |
| 34 Sherford Ltd | Poole | 2026 |
| 340 London Road Ltd | Altrincham | 2012 |
| 343.2 Ltd | Harrogate | 2022 |
| 345 Rail Leasing Limited | London | 2019 |
| 345 Rail Leasing MID Co Limited | London | 2019 |
| 347 Management Limited | Portsmouth | 2024 |
| 348 Holdings Limited | Droitwich | 2026 |
| 349 Group Limited | London | 2021 |
| 34LRR HCO Ltd | Tadworth | 2024 |
| 34TWELVE Holdings Ltd. | London | 2025 |
| 35 GSS Limited | London | 2026 |
| 350 Group Ltd | Bordon | 2025 |
| 350 PPM Ltd | London | 2011 |
| 353937 Ltd | Newcastle | 2023 |
| 354 Capital Limited | Grantham | 2017 |
| 355 Investment Group Limited | Milton Keynes | 2025 |
| 35720 Group Ltd | Swadlincote | 2025 |
| 358 Holdings Limited | London | 2022 |
| 35N76E | London | 2022 |
| 35TVS Holdings Ltd | Edinburgh | 2025 |
| 36 Colenso Ltd | London | 2025 |
| 36 Shon Ltd | Aberystwyth | 2025 |
| 36 South Management Limited | London | 2012 |
| 36 Sunnyside Road Corporation Limited | Bristol | 2026 |
| 360 Aspire UK Ltd | Harrow | 2020 |
| 360 Asset Finance Limited | Buckingham | 2007 |
| 360 Asset Holdings Ltd | Dumfries | 2025 |
| 360 Brand IP Limited | Manchester | 2024 |
| 360 Business Viewpoint Ltd | Stirling | 2018 |
| 360 Commercial Partners Ltd | Stanmore | 2017 |
| 360 Companies Ltd | Guildford | 2026 |
| 360 Data Services Ltd | Wrexham | 2009 |
| 360 Degrees Finance Ltd | Glasgow | 2021 |
| 360 Evolution Limited | Amersham | 2021 |
| 360 Financial Management Limited | Richmond | 2012 |
| 360 Fund Insight Limited | Edenbridge | 2017 |
| 360 Funding Ltd | York | 2018 |
| 360 Group Holdings Ltd | Telford | 2016 |
| 360 Lifelong Trading Ltd | Wolverhampton | 2025 |
| 360 Mortgage Consultants Limited | Amersham | 2014 |
| 360 Mortgage Solutions Ltd | Stafford | 2024 |
| 360 Mortgages and Finance Ltd | Liverpool | 2020 |
| 360 Mortgages Ltd | Bagshot | 2014 |
| 360 Phoenix Holding Ltd | London | 2020 |
| 360 Real Estate Partners Ltd | London | 2023 |
| 360 Revolution Limited | Ebbw Vale | 2018 |
| 360 Sales Group Limited | Leeds | 2023 |
| 360 Trading Networks UK Limited | London | 2022 |
| 360 UK Group Limited | Peterborough | 2022 |
| 360 Vehicle Management Limited | Blackpool | 2015 |
| 360 Viewpoint Ltd | Stirling | 2018 |
| 360 Wealth Ltd | Billericay | 2022 |
| 360-EQUITY Limited | London | 2019 |
| 360CLAIMSERVICES Limited | Brentwood | 2002 |
| 360VSE (Holdings) Limited | Kent | 2025 |
| 364 Days Wonderland Ltd | London | 2021 |
| 365 Bridging Ltd | Birmingham | 2026 |
| 365 Business Finance Limited | London | 2012 |
| 365 Business Finance SUB Limited | London | 2017 |
| 365 Capital Group Ltd | Wilmington | 2025 |
| 365 Capital Holdings Ltd | Birmingham | 2025 |
| 365 Funding Ltd | Milton Keynes | 2020 |
| 365 Health Group Limited | Liverpool | 2018 |
| 365 Holdings Limited | Leicester | 2016 |
| 365 Motor Finance Limited | Cardiff | 2019 |
| 365 Music Limited | London | 2002 |
| 365 Nagra Holdings Ltd | Leicester | 2025 |
| 365 People Group Ltd | Tugby | 2023 |
| 365 Portfolio Ltd | Bradford | 2025 |
| 365 Secure IT Limited | Southampton | 2022 |
| 365 Solutions Group Limited | Widnes | 2025 |
| 365 Super Holding Ltd. | London | 2018 |
| 366 Holdings Limited | Daventry | 2020 |
| 368 Properties Ltd | Belfast | 2020 |
| 369 Capital Partners Ltd | Stourbridge | 2026 |
| 369 Construction Universe Group Limited | London | 2023 |
| 369 Investors Ltd | Edgware | 2024 |
| 369 Vortex Limited | Market Harborough | 2023 |
| 37 Aviation Holdings Limited | Lincoln | 2025 |
| 37 KS Nominee Limited | London | 2020 |
| 37 Montgomery Street Limited | Glasgow | 2017 |
| 37 Trading Limited | London | 2024 |
| 37 Ventures Limited | London | 2024 |