| Broom Investments Limited | London | 2012 |
| Broom Midco Limited | London | 2024 |
| Broom Mortgages and Wealth Ltd | Colchester | 2021 |
| Broomco (3319) Limited | London | 2003 |
| Broomco (3971) Limited | Rickmansworth | 2005 |
| Broomco (4061) Limited | London | 2006 |
| Broomco (4276) Limited | London | 2014 |
| Broome & Wellington (Holdings) Limited | Manchester | 1987 |
| Broome Farm Holdings Limited | Stourport-On-Severn | 2021 |
| Broomer Farm Holdings Limited | Chichester | 2023 |
| Broomes and Curtis Finance Ltd | Northampton | 2026 |
| Broomes Holdings Limited | Preston | 2022 |
| Broomesque Holdings Ltd | London | 2025 |
| Broomfield & Alexander Wealth Management Ltd | Neath | 2011 |
| Broomfield Estates Limited | Hale Altricham | 2001 |
| Broomfield Holdings Ltd | Kingston Upon Thames | 2022 |
| Broomling Technologies Ltd | Ruislip | 2022 |
| Broomsleigh Properties Ltd | Harlow | 2021 |
| Broomway Limited | Chatham | 2001 |
| Bropharma Holding Limited | Wembley | 2019 |
| Brora Financial Services Ltd. | Brora | 2007 |
| Brora Golf Club Property Limited | Brora | 2024 |
| Bros and Co Holdings Ltd | Egham | 2025 |
| Bros Holdings Ltd | Romford | 2020 |
| Brosen Limited | Blackburn | 2019 |
| Broseph Property Holdings Ltd | Chesterfield | 2020 |
| Brosterfield Investments Ltd | Hope Valley | 2016 |
| Brother + KIN Holdings Limited | Hawarden | 2025 |
| Brother Finance (U.K.) PLC | Manchester | 1989 |
| Brothers & Business Investment Limited | St Albans | 2020 |
| Brothers International (UK) Limited | London | 2018 |
| Brothers Investments (Leic) Ltd | Leicester | 2017 |
| Brothers Press Limited | Borehamwood | 2016 |
| Brotherton Capital Limited | London | 2017 |
| Brotherton Fine Limited | London | 2017 |
| Brotherton Holdings Limited | London | 2018 |
| Brotherton Newco Limited | Newbury | 2025 |
| Brotherton Uzan Limited | London | 2017 |
| Brotherwood Holdings Limited | Sherborne | 2017 |
| Brothwell Irvine (Holdings) Ltd | Newton Abbot | 2024 |
| Brouard Olivier Services Ltd | London | 2016 |
| Brough Enterprises Limited | Polesworth | 2018 |
| Brough Holdings Ltd | Birmingham | 2023 |
| Brougham Investments Limited | Glasgow | 2016 |
| Broughroyd Limited | Chalfont St Giles | 1960 |
| Brought UP Ltd | London | 2026 |
| Broughton Capital Ltd | Solihull | 2002 |
| Broughton Electro Holdings Ltd | Redditch | 2021 |
| Broughton Group Limited | Melksham | 2023 |
| Broughton Investco 1 Limited | Eccleshall | 2023 |
| Broughton of Batley (Holdings) | Ilminster | 1958 |
| Broughton Ventures Limited | Skipton | 2010 |
| Broughtons Financial Planning Limited | Manchester | 2000 |
| Broughtons Group Limited | Leicester | 2018 |
| Brower Limited | Esher | 2016 |
| Browett & Co Mortgage Services Limited | Harrow | 2021 |
| Browfield Farm Holdings Ltd | Accrington | 2021 |
| Browhead Holdings Limited | Rochdale | 2025 |
| Brown & Blond Group Limited | Hyde | 2021 |
| Brown & Brown (Europe) Holdco Limited | London | 2022 |
| Brown & Brown (Europe) Limited | London | 2013 |
| Brown & Brown (UK) Holdco Limited | London | 2020 |
| Brown & Brown Broking Holdco (Europe) Limited | London | 2014 |
| Brown & Brown Claims (UK) Limited | London | 2008 |
| Brown & Brown Health and Employee Benefits Limited | London | 2000 |
| Brown & Brown Insurance Brokers (UK) Limited | London | 2015 |
| Brown & Brown Minorities (UK) Limited | London | 2021 |
| Brown & Brown Retail Holdco (Europe) Limited | London | 2015 |
| Brown & Brown Services Ltd | London | 2010 |
| Brown & Co Financial Planning Ltd | Bicester | 2023 |
| Brown & Co Group Limited | Thornton-Cleveleys | 2023 |
| Brown & Co Holdings Ltd | Macclesfield | 2021 |
| Brown & Co Trustees Limited | Norwich | 2022 |
| Brown & Co. B.V. Ltd | London | 2023 |
| Brown & Everett Holdings Ltd | Luton | 2020 |
| Brown & Grey Holdings Limited | London | 2025 |
| Brown & Holmes (Tamworth) Holdings Limited | Birmingham | 2024 |
| Brown & Hulme Entertainment Limited | Scarborough | 2026 |
| Brown & Sutherland Associates Limited | Seaham | 2005 |
| Brown Advisory US Smaller Companies PLC | London | 1993 |
| Brown and Shaw Limited | Leicester | 2018 |
| Brown Argus Trading Limited | London | 2014 |
| Brown Bidco Limited | Luton | 2020 |
| Brown Booth Holdings Limited | Poole | 2022 |
| Brown Boveri Investment Co., Ltd | London | 2017 |
| Brown Box Group Ltd | Tamworth | 2025 |
| Brown Brothers Harriman Investor Services Ltd. | London | 1999 |
| Brown Brothers Security Limited | Chorley | 2019 |
| Brown Butler Group Limited | Leeds | 2020 |
| Brown Butlin Group Pension Trust Limited | Wisbech | 1986 |
| Brown Carrick Holdings Limited | London | 2026 |
| Brown Dog Holdings Limited | Huddersfield, | 2026 |
| Brown Family Developments Ltd | Leamington Spa | 2024 |
| Brown Ginger and Grey Limited | Cobham | 2026 |
| Brown Group Holdings Limited | Ripley | 2021 |
| Brown Hawke Holdings Limited | Bodmin | 2022 |
| Brown Holdings Limited | Sutton-In-Ashfield | 2026 |
| Brown Housing Holdings Limited | March | 2020 |
| Brown Investment Group Limited | London | 2019 |
| Brown JC Limited | Derby | 2019 |