| Bianca Construct Limited | Construction | 2026 |
| Bianca Contract Building Limited | Construction | 2022 |
| Big Foot Kitchens Ltd | Manufacturing | 2023 |
| Big Ideas Corporation Ltd | Administrative & support | 2009 |
| Big Mood Co Ltd | Hospitality | 2023 |
| Big Star Creations Ltd | Arts & recreation | 2008 |
| Big Star Speakers Limited | Arts & recreation | 2024 |
| Bigt Mobile Ltd | Professional & scientific | 2022 |
| Bill Passmore International Limited | Other services | 2016 |
| Billingham & Co (Stourbridge) Limited | Real estate | 2006 |
| Bingham & Christie Properties Limited | Real estate | 2018 |
| Bioenergy Solutions Limited | Manufacturing | 2020 |
| Birmingham 1000 Basketball Club C.I.C. | Education | 2024 |
| Birmingham Education Advisory Service Limited | Administrative & support | 2023 |
| Birmingham Horror Film Festival Ltd | Arts & recreation | 2025 |
| Birmingham Orthopaedics LLP | | 2023 |
| Birmingham Probate Services (Bpsi) Ltd | Administrative & support | 1999 |
| Birmingham Probate Services Limited | Professional & scientific | 1993 |
| Birmingham SAW Blades Limited | Manufacturing | 1972 |
| Birmingham Speedway 2022 Limited | Arts & recreation | 2021 |
| Birway Limited | Administrative & support | 2001 |
| Biss Cleaning Ltd | Administrative & support | 2025 |
| Bitandpieces Vape Limited | Wholesale & retail | 2013 |
| Bitech Group Ltd | Administrative & support | 2022 |
| BJM Properties Limited | Real estate | 2002 |
| Bjsmith Consultancy Limited | Information & communication | 2007 |
| BJT Land Holdings Limited | Agriculture & fishing | 2011 |
| BKL Forward Ltd | Real estate | 2024 |
| Black Country & Beyond Ltd | Wholesale & retail | 2024 |
| Black Country Asbestos Contracts Limited | Water & waste | 2016 |
| Black Country Barbell Limited | Arts & recreation | 2016 |
| Black Country BJJ Limited | Education | 2019 |
| Black Country Boating Festivals Limited | Hospitality | 2004 |
| Black Country Brickwork Limited | Construction | 2016 |
| Black Country Leisure Zone Ltd | Arts & recreation | 2024 |
| Black Country Pressings Holdings Ltd | Real estate | 2019 |
| Black Country Pressings Limited | Manufacturing | 2000 |
| Black Country Properties Limited | Real estate | 2025 |
| Black Country Rocks & Fossils Ltd | Wholesale & retail | 2019 |
| Black Country Scooters Limited | Extraterritorial | 2021 |
| Black Country Skirting Ltd | Manufacturing | 2024 |
| Black Country Steam Engineering Ltd | Professional & scientific | 2024 |
| Black Country Sweepers and Environmental Services Ltd | Administrative & support | 2026 |
| Black Country Utilities Limited | Energy | 2010 |
| Black Diamond Star Limited | Wholesale & retail | 2025 |
| Blackfoot Developments Limited | Real estate | 2015 |
| Blacktide Investments Ltd | Real estate | 2015 |
| Blacktide P3M Ltd | Information & communication | 2023 |
| Blackwell Tree Solutions Limited | Agriculture & fishing | 2009 |
| Blair Media Ltd | Information & communication | 2021 |
| Blakedown Mews Management Limited | Real estate | 2004 |
| Blessed Horizon Ltd | Real estate | 2025 |
| Blnc Ltd | Real estate | 2025 |
| Blondie's Cake House Ltd | Manufacturing | 2022 |
| Bloom & Cross Ltd | Professional & scientific | 2017 |
| Blossomfield Road Management Co. Limited | Extraterritorial | 2019 |
| Blue ASH Property Leasing Limited | Real estate | 2017 |
| Blue Bright Electrics Ltd | Construction | 2023 |
| Blue Daisy Flowers Limited | Wholesale & retail | 2008 |
| Blue Jade Holdings Limited | Real estate | 2021 |
| Blue Kraken Productions Ltd | Information & communication | 2021 |
| Blue Line Aerial Photography Ltd | Professional & scientific | 2026 |
| Blue Oak Enterprises Limited | Transport & logistics | 2010 |
| Blue Rock Capital A6 Ltd | Real estate | 2025 |
| Blue Star 19 Limited | Wholesale & retail | 2025 |
| Blueprint Design and Graphics Limited | Manufacturing | 2006 |
| BM Racing Limited | Financial services | 2010 |
| BM Trading Management Limited | Real estate | 2020 |
| BMAUTOPARTS24 Ltd | Wholesale & retail | 2024 |
| BMK Couriers Ltd | Transport & logistics | 2025 |
| BMO Holdings Ltd | Financial services | 2023 |
| BMT1 Limited | Administrative & support | 2020 |
| BOB Francis Limited | Professional & scientific | 2003 |
| BOB Stinton Garages Limited | Real estate | 1957 |
| Bobby & Vino Ltd | Wholesale & retail | 2025 |
| Bobglen Limited | Transport & logistics | 1986 |
| Bodywork Solutions Ltd | Manufacturing | 2016 |
| Bokiodogshop Ltd | Wholesale & retail | 2025 |
| Bong Motor Services Limited | Wholesale & retail | 2023 |
| Bonita Griffiths Ltd | Health & social care | 2021 |
| Bonsha Estate Ltd | Real estate | 2025 |
| Bonsha Motors Ltd | Wholesale & retail | 2019 |
| Bonsha Property 1 Ltd | Real estate | 2025 |
| Bookkeeping & Payroll Solutions Ltd | Professional & scientific | 2018 |
| Boost Analytics Limited | Administrative & support | 2022 |
| Borditt and Legitt Ltd | Construction | 1994 |
| Borne Holdings Limited | Financial services | 2023 |
| Borne Joinery Limited | Manufacturing | 2017 |
| Bosh Property Services Ltd | Real estate | 2024 |
| Bosworth Commercials Ltd | Wholesale & retail | 2025 |
| Bottle for Life Limited | Professional & scientific | 2011 |
| Boulton Bookkeeping Limited | Professional & scientific | 2018 |
| Boundary Marketing & PR Limited | Professional & scientific | 2021 |
| Boundless Events Ltd | Hospitality | 2017 |
| Bournebrook Transport & Trade Limited | Transport & logistics | 2015 |
| Bowers Traditional Builders Limited | Construction | 2011 |
| Bpja Investments Limited | Real estate | 2016 |
| BPS (Wills) Limited | Professional & scientific | 1994 |
| BR Housing Development Limited | Real estate | 2022 |
| BR Pipework Limited | Construction | 2015 |