| Barnet Welding Ltd | London | 2015 |
| Barnet Window Company Limited | Barnet | 1997 |
| Barnett & Shaw (Sheetmetal) Limited | Leicester | 2005 |
| Barnett Confectioners Limited | Nottingham | 1972 |
| Barnett Developments Concrete Ltd | York | 2026 |
| Barnett Engineering Limited | Wrexham | 1989 |
| Barnett Steel Services Limited | Waltham Cross | 2018 |
| Barnett's(Buglawton)Limited | Maryport | 1931 |
| Barney Bund Ltd | Belvedere | 2023 |
| Barney's Beer Limited | Stirling | 2012 |
| Barney's Biscuit Boxes Limited | High Wycombe | 2014 |
| Barney's Sarnies UK Ltd | Willenhall | 2025 |
| Barneys Horseradish Co. Ltd | Purfleet | 2004 |
| Barnfather Holdings Limited | Wednesbury | 2001 |
| Barnfather Wire (Midlands) Limited | Wednesbury | 2007 |
| Barnfather Wire Limited | Wednesbury | 2009 |
| Barnfield Foods Limited | London | 2021 |
| Barnies Foods Limited | Watton | 2003 |
| Barno Print Limited | London | 2016 |
| Barnoe Ltd | Dungannon | 2020 |
| Barns Industrial Battery Services Limited | Wickford | 2009 |
| Barnshaw Bending Centre Limited | Oldbury | 1990 |
| Barnshaw Plate Rollers Limited | Oldbury | 1989 |
| Barnshaw Section Benders Limited | Warley | 2001 |
| Barnsley Bolt and NUT Limited | Barnsley | 2024 |
| Barnsley Canister Co. Limited | Oxfordshire | 1919 |
| Barnsley Community Media CIC | Barnsley | 2025 |
| Barnsley Glass & Glazing Limited | Sheffield | 2000 |
| Barnsley Glass (2015) Limited | Barnsley | 2015 |
| Barnsley Refrigeration Services Limited | Barnsley | 1996 |
| Barnswood Limited | Helston | 1994 |
| Barnvale Engineering & Supply Company Limited | Barking | 2000 |
| Barnwell Footwear Limited | Kettering | 2021 |
| Barnwell Print Limited | Norwich | 1999 |
| Barnwood Bespoke Ltd | Ardingly | 2023 |
| Barnwood Carpentry Ltd | Godalming | 2024 |
| Barnyard Aluminium Ltd | Taunton | 2018 |
| Baro Vehicles Ltd | Nuneaton | 2015 |
| Barok Group Ltd | London | 2025 |
| Baron & Birch Ltd | London | 2025 |
| Baron Fire Limited | North Benfleet | 1996 |
| Baron JAY Limited | Newton Abbot | 1973 |
| Baron Mercer Group Limited | Accrington | 2004 |
| Baron Motors Limited | Northampton | 1959 |
| Baron Springs Ltd | Glasgow | 2004 |
| Baron Tailors Limited | London | 2006 |
| Baron Technology Limited | Little Chalfont | 1988 |
| Baron's (Fylde Coast Supplies) Limited | Leyland | 1991 |
| Baron-Colairo Engineering Ltd | Bridlington | 2023 |
| Baron-Oxberry Motorsports Ltd | Leyland | 2022 |
| Baronbury Limited | Newcastle Under Lyme | 1975 |
| Baroness Bakery Ltd | Hereford | 2021 |
| Baronie UK Limited | Corby | 2015 |
| Baronmead International Limited | Bognor Regis | 1982 |
| Baronscourt Brewing Company Ltd | Omagh | 2018 |
| Baronscourt Estate Distillery Company Ltd | Newtownstewart | 2021 |
| Baronsgate Limited | Liverpool | 2014 |
| Barony Clothing UK Ltd | Croydon | 2025 |
| Barony Country Foods Ltd. | Lockerbie | 1998 |
| Barony Universal Products Limited | Salford | 2025 |
| Baroque Bespoke Jewellery Limited | Shoreham-By-Sea | 2006 |
| Baroque Creative Wood and Metal Ltd | Bexhill | 2018 |
| Baroque Designs UK Limited | Canterbury | 2008 |
| Barossa Capital Advisers Limited | Brighton | 2003 |
| Barr & Co Jewellery Ltd | Llandeilo | 2017 |
| Barr & Grosvenor Limited | | 2000 |
| Barr & Larkin Limited | Basingstoke | 2023 |
| Barr Electrical Services Ltd | Paisley | 2025 |
| Barra Watches Ltd | Reading | 2021 |
| Barrack Power Services Ltd | Bristol | 2014 |
| Barracuda Baths Ltd. | Norwich | 2016 |
| Barracuda Equipment Limited | Dartford | 1981 |
| Barramundi Wines Ltd | Blandford Forum | 2017 |
| Barranco’S Coffee, Champagne & Co Limited | Derby | 2025 |
| Barrass (Hull) Limited | Hull | 2002 |
| Barratlantic Limited | Isle Of Barra | 1974 |
| Barratt Boards Ltd | St. Columb | 2021 |
| Barratt Engineering Limited | Emsworth | 2018 |
| Barratt Workwear & Graphics Ltd | Telford | 2021 |
| Barratt's Bakery Ltd | High Peak | 2025 |
| Barraud & Lund Limited | Nottingham | 2010 |
| Barrblast Engineering Limited | Oban | 2013 |
| Barrcroft Group Ltd | Erith | 2024 |
| Barre Construction Limited | Shrewsbury | 2024 |
| Barrel and Crown Co. Ltd | Gateshead | 2025 |
| Barrel Rostery Ltd | Manchester | 2025 |
| Barrel Sauna UK Ltd | Cardiff | 2026 |
| Barrel Top Wagons Ltd | Wells | 2011 |
| Barrell Sculpture Limited | Wadebridge | 2009 |
| Barrelled Black Ltd | Filey | 2018 |
| Barrelled Locksmiths Limited | Exeter | 2023 |
| Barrelsfurniture Ltd | Southampton | 2024 |
| Barrelz Limited | Bewdley | 2024 |
| Barren Land Clothing Ltd | Treorchy | 2021 |
| Barrett & Co. Limited | Gravesend | 1995 |
| Barrett Inter-Signs Company Limited(The) | Bridgnorth | 1964 |
| Barrett Print for Schools Limited | Gravesend | 2012 |
| Barrettine (Industrial) Limited | Bristol | 1982 |
| Barrettine Holdings Limited | Bristol | 2014 |
| Barrettine Products Limited | Bristol | 1982 |