| 1MSM Limited | West George Street | 2016 |
| 1NESECURITY Limited | Swanley | 2025 |
| 1NEWCO Ltd | Hereford | 2024 |
| 1NXGENTECH Holdings Limited | London | 2026 |
| 1OAK Capital Limited | London | 2009 |
| 1OF1 Bespoke Design Ltd | Wembley | 2025 |
| 1PS Group Limited | Tunbridge Wells | 2018 |
| 1Q Ltd | Dundee | 2024 |
| 1REDCUBE Holdings Ltd | Dudley | 2020 |
| 1RG Holdings Limited | Colindale | 2020 |
| 1SEVEN Investment Holdings Ltd | London | 2022 |
| 1SPS Bidco 1 Ltd | Altrincham | 2026 |
| 1SPS Holdco 1 Ltd | Altrincham | 2026 |
| 1ST & Eco Holdings Limited | Liverpool | 2025 |
| 1ST 4 UK Mortgages Ltd | March | 2019 |
| 1ST Call 4 Mortgages (UK) Ltd | Shanklin | 2014 |
| 1ST Call Plant Group Limited | Gloucester | 2017 |
| 1ST Call Services Group Ltd | Sheffield | 2024 |
| 1ST Care Holding Ltd | Harrow | 2023 |
| 1ST Choice Auto Body Group UK Ltd | Cardiff | 2017 |
| 1ST Choice Auto Holdings Ltd | Cardiff | 2026 |
| 1ST Choice Garage Doors & Gates Limited | Wrotham Heath | 1976 |
| 1ST Choice Group Limited | Chorley | 2022 |
| 1ST Choice Holdings Limited | Leicester | 2025 |
| 1ST Choice Memorials Holdings Limited | Milton Keynes | 2025 |
| 1ST Choice Mortgages Limited | Pinner | 2018 |
| 1ST Choice Security Ltd | London | 2024 |
| 1ST Choice Vehicle Finance Limited | Shoreham By Sea | 2008 |
| 1ST CLAIMS4U Limited | Glasgow | 2018 |
| 1ST Class Financial Services Limited | Birmingham | 2026 |
| 1ST Class Holidays (Holdings) Limited | Manchester | 2015 |
| 1ST Commercial Finance (London) Limited | Milton Keynes | 2024 |
| 1ST Commercial Funding Limited | Poole | 2014 |
| 1ST Coverall Holdings Ltd | Ashford | 2020 |
| 1ST Drywall Limited | Colchester | 2019 |
| 1ST Financial Foundations Limited | Milton Keynes | 2001 |
| 1ST Financial Group Limited | Sunderland | 2001 |
| 1ST Financial Limited | London | 2000 |
| 1ST Financial Services Ltd | Crawley | 2016 |
| 1ST Financial Services(London) Limited | Bucks | 2006 |
| 1ST Folding Sliding Holdings Limited | London | 2023 |
| 1ST FS Limited | Tunbridge Wells | 2018 |
| 1ST Furnace Holdings Limited | Tamworth | 2016 |
| 1ST Homecare (Holdings) Limited | Leighton Buzzard | 2015 |
| 1ST Horizon Capital Ltd | Barnsley | 2025 |
| 1ST Legacy Estates Ltd | London | 2019 |
| 1ST Line Group Ltd | Ammanford | 2026 |
| 1ST Mortgage Services & Co Ltd | Halifax | 2019 |
| 1ST MX Holdings Limited | Leyland | 2021 |
| 1ST Option Consulting Services Limited | Warrington | 1996 |
| 1ST Policy Lond Limited | London | 2009 |
| 1ST Practice Holdings Limited | Beverley | 2023 |
| 1ST Premier Finance Ltd | Northampton | 2015 |
| 1ST Rate Investment (UK) Limited | London | 2004 |
| 1ST Solutions Group Limited | Perth | 2025 |
| 1ST Step to Claim Ltd | Cardiff | 2024 |
| 1ST Sure Limited | Potters Bar | 2006 |
| 1ST Technologies Group Ltd | London | 2025 |
| 1ST Traders Limited | London | 2021 |
| 1ST Union Holding Limited | London | 2023 |
| 1ST1 Technology Group Limited | Leicester | 2023 |
| 1STCALLLEGAL Ltd | Portsmouth | 2023 |
| 1STCHOICE Connected Limited | Birmingham | 2025 |
| 1TOP Stop Limited | London | 2025 |
| 1VN Ltd | Towcester | 2024 |
| 1X2 Network Holdings Limited | Brentwood | 2025 |
| 1XZ Holdings Ltd | London | 2021 |
| 1Y7E Ltd | Canterbury | 2025 |
| 2 & 4 Investments Limited | St. Asaph | 2021 |
| 2 Agriculture Holdings Limited | Birmingham | 2025 |
| 2 ALP Finance Ltd | London | 2023 |
| 2 Apples Limited | Braunstone | 2015 |
| 2 Birds Group Ltd | Birmingham | 2024 |
| 2 Blocks Ventures Limited | London | 2021 |
| 2 Brothers Holdings Limited | Portsmouth | 2024 |
| 2 Burnaby Gardens Limited | London | 2017 |
| 2 D Services Holdings Limited | Chippenham | 2020 |
| 2 Degrees West Holdings Limited | Harrow | 2018 |
| 2 Direct Limited | Peterborough | 2003 |
| 2 Excel (Holdings) Limited | London | 2017 |
| 2 Excel Group Limited | London | 2024 |
| 2 Excel Midco Limited | London | 2024 |
| 2 EXP Financial Services Limited | Caerphilly | 2016 |
| 2 Heads Global Holdings Limited | Marlow | 2009 |
| 2 Last Real Limited | London | 2012 |
| 2 Lucan Place Nominees Limited | Southall | 2024 |
| 2 Making Smiles Limited | Beaconsfield | 2024 |
| 2 MAN Dispatch Holdings Limited | Sutton Coldfield | 2021 |
| 2 Plan Wealth Management Limited | Leeds | 2006 |
| 2 Recycling Holdings Limited | Altrincham | 2018 |
| 2 SAN Global Holdings Ltd | Carnforth | 2021 |
| 2 Sisters Holdings Limited | London | 2025 |
| 2-10 Mortimer Street (GP NO 1) Limited | London | 2010 |
| 2-10 Mortimer Street GP Limited | London | 2010 |
| 2-8 Eastcheap Limited | Norwich | 2025 |
| 2.1E7 Ltd | London | 2025 |
| 2.5POCHES Ltd | Hornchurch | 2025 |
| 20 DS Lease Limited | London | 2025 |
| 20 Gracechurch (General Partner) Limited | London | 2006 |
| 20 Seconds Investments Ltd | Oxford | 2026 |