| Black Barrel Armouries Ltd | Bury St. Edmunds | 2022 |
| Black Beacon (SA) Limited | Newcastle Upon Tyne | 2025 |
| Black Bean Productions Ltd | Harlow | 2022 |
| Black Bear Honey Company Ltd | Newbury | 2020 |
| Black Bear Ltd | Newbury | 2021 |
| Black Bear Paddleboarding Limited | Morpeth | 2007 |
| Black Bear Timber Framing Limited | Totnes | 2018 |
| Black BEE Honey Limited | Shepton Mallet | 2017 |
| Black BEE RUM Company Limited | Stanley | 2022 |
| Black Belt Embroidery Ltd | Kington | 2022 |
| Black Bess Limited | Cambridge | 2014 |
| Black BIN Bags Co Ltd | Birmingham | 2025 |
| Black Bird Brewery Limited | Bury St. Edmunds | 2014 |
| Black Bison Group Industries Limited | High Wycombe | 2020 |
| Black Bones Jewellery Ltd | Wolverhampton | 2025 |
| Black Boots Limited | London | 2013 |
| Black Box (London) Limited | Ilford | 2014 |
| Black Box Bakery Ltd | Newcastle | 2026 |
| Black Box Brewery Ltd | Southend On Sea | 2021 |
| Black Box Design Solutions Ltd | London | 2025 |
| Black Box Group Ltd | Peebles | 2016 |
| Black Box Spices Ltd | Shrewsbury | 2019 |
| Black British Soul Food Ltd | London | 2025 |
| Black Brow Abattoir Limited | Wigton | 2023 |
| Black Bull Fencing Limited | Manchester | 2014 |
| Black CAB Studio Ltd | Peterborough | 2016 |
| Black Candy Dance Designs Limited | Glasgow | 2014 |
| Black Cat Barbell Ltd | London | 2022 |
| Black Cat Business Services Limited | High Wycombe | 2005 |
| Black Cat Displays Limited | Reading | 2007 |
| Black Cat Distillery Ltd | Penrith | 2022 |
| Black Cat Embroidery Ltd. | Sowerby Bridge | 2008 |
| Black Cat Manufacturing Ltd | Wigan | 2015 |
| Black Cat Prints Limited | York | 2022 |
| Black Cat Productions Limited | Croydon | 2025 |
| Black Cat Sourdough Limited | Hornchurch | 2024 |
| Black Cat Studio Limited | Birmingham | 2023 |
| Black Cat Wholesale Bakery Ltd | Glasgow | 2016 |
| Black Cat Works Ltd | London | 2024 |
| Black Chantry Productions Limited | Nottingham | 2017 |
| Black Cherry Catering Ltd | Edinburgh | 2015 |
| Black Classic Ltd | Bushey | 2006 |
| Black Clawson Limited | Newport | 2000 |
| Black Cocoa Patisserie Limited | Peacehaven | 2018 |
| Black Country Binding Ltd | West Midlands | 2007 |
| Black Country Brewery Limited | West Midlands | 2003 |
| Black Country Electrical Supplies Ltd | Wednesbury | 2021 |
| Black Country Engineering Group Limited | Northampton | 2020 |
| Black Country Fire Protection Limited | Tipton | 2020 |
| Black Country Furniture Ltd | Dudley | 2025 |
| Black Country Glass Ltd | Walsall | 2017 |
| Black Country Industrial Maintenance Ltd | Dudley | 2026 |
| Black Country Jaguars Limited | Norwich | 2020 |
| Black Country Marine Limited | Birmingham | 2026 |
| Black Country Paints Limited | Wolverhampton | 1993 |
| Black Country Pins Limited | Bilston | 1993 |
| Black Country Pressings Limited | Stourbridge | 2000 |
| Black Country RAW Limited | Wednesbury | 2023 |
| Black Country Refurbishments Ltd | Cradley Heath | 2012 |
| Black Country Rope and Lifting Ltd | Tipton | 2021 |
| Black Country Saddles Limited | Cannock | 2002 |
| Black Country Shoes Ltd | Oldbury | 2020 |
| Black Country Signs Limited | Halesowen | 2016 |
| Black Country Skirting Ltd | Stourbridge | 2024 |
| Black Country Windows Limited | Walsall | 1991 |
| Black Cowboy Jeans Co Ltd | Sutton | 2016 |
| Black Crow Gaming Ltd | Norwich | 2025 |
| Black Crown Label Limited | Camberley | 2020 |
| Black Cuillin Holdings Ltd | London | 2022 |
| Black CUP Ltd | London | 2025 |
| Black Diamond Cars & Wraps Limited | Waterlooville | 2018 |
| Black Diamond Fibreglass Ltd | Cambridge | 2024 |
| Black Diamond Printing Ltd | Wolverhampton | 2025 |
| Black Dog Deli Foods Limited | Halesworth | 2017 |
| Black Dog Design and Production Limited | Barnet | 2005 |
| Black Dog Digital Limited | Barnet | 2006 |
| Black Dog Fabrication Limited | Radstock | 2018 |
| Black Dog Hill Estates Ltd | Hailsham | 2014 |
| Black Dog Precision Limited | Poole | 2025 |
| Black Dog RUM Limited | Isle Of Arran | 2023 |
| Black Dog Signs Limited | Saxlingham | 2002 |
| Black Dog Upholstery Limited | Walsall | 2016 |
| Black Eagle Agency Ltd | London | 2025 |
| Black Eagle International UK Ltd. | Bristol | 2016 |
| Black ELK Leisure Limited | Skipton | 2018 |
| Black Ember Ltd | Poole | 2025 |
| Black Ember Smokehouse Limited | Molton | 2026 |
| Black FEN Brewery Ltd | Burwell | 2017 |
| Black Fern Media Ltd | Dunfermline | 2025 |
| Black Fief Ltd | New Mills | 2018 |
| Black Flag Brewery Ltd | Perranporth | 2013 |
| Black Flag Drinks Ltd | Winchester | 2024 |
| Black Forest Chocolates Limited | Redditch | 2017 |
| Black Forest Joinery Ltd | Newry | 2023 |
| Black Forge Manufacturing Ltd | London | 2025 |
| Black FOX Metalcraft Ltd | Berwick-Upon-Tweed | 2012 |
| Black FOX Products Ltd | Windsor | 2016 |
| Black Frames Creative Ltd | London | 2025 |
| Black Gals Livin' Ltd | London | 2020 |
| Black Gang Marine Ltd | Portsmouth | 2018 |