| Barratt Holdings Ltd | London | 2019 |
| Barratts 24 Holdings Ltd | Maidstone | 2024 |
| Barratts Legal Limited | Nottingham | 2021 |
| Barrds Limited | Durham | 2023 |
| Barreg Group Limited | Pontefract | 2026 |
| Barrel Brothers Limited | Leeds | 2025 |
| Barrell Holdings Limited | Bolton | 2021 |
| Barrels and Bubbles Enterprises Limited | Corfe Mullen | 2025 |
| Barrenjoey Capital Ltd | Richmond | 2007 |
| Barres Investments Ltd | Bournemouth | 2020 |
| Barret & SON Limited | Bristol | 2012 |
| Barrett and Sainty Investments Ltd | Wisbech | 2017 |
| Barrett and Thomson Financial Services Limited | Berks | 2007 |
| Barrett Corp & Harrington Ltd | Cheltenham | 2006 |
| Barrett Engineering Steel Trading Limited | Dudley Hill,Bradford | 1996 |
| Barrett Family Holdings Limited | Thatcham | 2011 |
| Barrett Group Eglish Ltd | Dungannon | 2023 |
| Barrett Group Holdings Ltd | Wolverhampton | 2024 |
| Barrett Mortgages Ltd | Poole | 2017 |
| Barrett Trading Ltd | Waterlooville | 2024 |
| Barrett Underwriting Limited | London | 1998 |
| Barrett Ventures Ltd | London | 2016 |
| Barrhill Community Interest Company | Girvan | 2008 |
| Barri Davies Holdings Limited | Oldbury | 2025 |
| Barrian Claims Ltd | Cwmbran | 2011 |
| Barric Investments Ltd | Coalville | 2024 |
| Barrie Beard EOT Limited | Bromsgrove | 2024 |
| Barrie Bookkeeping & Payroll Solutions Limited | Glenrothes | 2011 |
| Barrie Financial Services Limited | Southampton | 2002 |
| Barrie Highfield & Associates Limited | Chepstow | 2000 |
| Barrie Hough Services (Stoke on Trent) Limited | Audley | 2002 |
| Barrie Roberts Financial Adviser Limited | Cheadle | 2010 |
| Barrie Stephen Holdings Limited | Leicester | 2012 |
| Barrier Holdings (NE) Ltd | Shildon | 2020 |
| Barrier Services Limited | Milton Keynes | 2024 |
| Barrington Asset Management Limited | St. Neots | 2024 |
| Barrington Exchange Ltd | London | 2025 |
| Barrington Hamilton Personal Asset Management Ltd. | Farnborough | 2007 |
| Barrington James Investments Ltd | Tiptree | 2023 |
| Barrington Jarvis Limited | Newcastle | 1992 |
| Barrington Management Ltd | Barry | 2017 |
| Barrington Mortgage Solutions Ltd | Bishop Auckland | 2020 |
| Barrington Securities Limited | Tenterden | 1983 |
| Barrington Security Elite Ltd | Cannock | 2025 |
| Barrington Smith Financial Ltd | Walsall | 2011 |
| Barrington Stanley Holdings Ltd | Liverpool | 2022 |
| Barringtoncooper Ltd | Altrincham | 2009 |
| Barrmill Holdings Ltd | Barrmill | 2023 |
| Barrmona Holdings Ltd | Salford | 2019 |
| Barro Ventures Ltd | Ayr | 2025 |
| Barrock Holdings Limited | London | 2025 |
| Barron Capital Ltd | Nottingham | 2021 |
| Barron Financial Solutions Ltd | Southport | 2001 |
| Barron Investment Properties Ltd | Spalding | 2025 |
| Barron Mccann Holdings Limited | Derby | 2013 |
| Barron Wealth Management Limited | Edinburgh | 2026 |
| Barron Wood Distribution Group Limited | Preston | 2023 |
| Barround Finance Limited | Sheffield | 1964 |
| Barrow Commercial & Residential Ltd | Manchester | 2019 |
| Barrow Family Holdings Limited | Bury St Edmunds | 2026 |
| Barrow Funding Holdings Limited | London | 2023 |
| Barrow Funding PLC | London | 2023 |
| Barrow Hazell & Company Ltd | Essex | 1999 |
| Barrow Lane Holdings Ltd | London | 2022 |
| Barrow Lane Management Limited | Harrow | 2010 |
| Barrowclough Holdings Limited | Nelson | 2018 |
| Barrowfield Holdings Limited | Chester | 2024 |
| Barrowmore Investments Limited | Great Barrow | 2017 |
| Barrows Hill Properties Ltd | Yeovil | 2018 |
| Barrowway NO. 2 Limited | Chorley | 2015 |
| Barrs Holdings Ltd | Darwen | 2025 |
| Barrwood Agricultural Holdings Limited | Glasgow | 2016 |
| Barry Burke Technology Limited | | 2007 |
| Barry Devlin Holdings Limited | Kilmarnock | 2018 |
| Barry Fenton Independent Financial Advisers Ltd | Doncaster | 1997 |
| Barry Grainger Limited | Manchester | 2000 |
| Barry Grewcock Holdings Limited | Corby | 2011 |
| Barry Johnson Financial Services Limited | Northampton | 2015 |
| Barry Laws Holdings Ltd | Bradford | 2025 |
| Barry Lewis Investments Limited | Congleton | 2014 |
| Barry Magill Financial Services Ltd | Newry | 2012 |
| Barry Robinson Mortgage Advisor Ltd | Gloucester | 2018 |
| Barry Wise Mortgages Ltd | Southsea | 2024 |
| Barryroe Holdings Unlimited | Bath | 2019 |
| Barsad Boustan Limited | London | 2025 |
| Barsad Holdings Limited | London | 2023 |
| Barsad Limited | London | 2002 |
| Bart Holdings Ltd | Loughborough | 2025 |
| Barta M.A.I. Limited | London | 2017 |
| Bartas Holdings Limited | Basildon | 2026 |
| Bartaward Limited | Henley-In-Arden | 1968 |
| Barte Ltd | Stockport | 2022 |
| Bartec Holdings Ltd | Northwich | 2022 |
| Bartent Ltd | London | 2022 |
| Barters Farm Holdings Limited | Westbury | 2024 |
| Bartholomew & James (Financial Services) Limited | Belfast | 1987 |
| Bartholomew Hawkins Limited | Cardiff | 2005 |
| Bartington Defence and Aerospace Limited | Witney | 2024 |
| Bartington Holdings Limited | Witney | 2020 |
| Bartleby Topco Limited | London | 2024 |