| Birmingham Medical Aesthetics Ltd | Other services | 2023 |
| Birmingham Medical Limited | Health & social care | 2013 |
| Birmingham Medics Ltd | Education | 2024 |
| Birmingham Mercantile UK Ltd | Wholesale & retail | 2018 |
| Birmingham Metal Holdings Limited | Extraterritorial | 1987 |
| Birmingham Metallurgical Association(The) | Other services | 1920 |
| Birmingham Metropolitan Estates Limited | Extraterritorial | 2007 |
| Birmingham Mortgage Hub Limited | Financial services | 2025 |
| Birmingham Moseley Rugby Limited | Arts & recreation | 2002 |
| Birmingham Mosque Trust Limited (the) | Education | 1969 |
| Birmingham MOT Holdings Limited | Financial services | 2025 |
| Birmingham Motor Hub Ltd | Wholesale & retail | 2019 |
| Birmingham Motor Spares Ltd | Wholesale & retail | 2025 |
| Birmingham Motor Tyres Limited | Wholesale & retail | 1935 |
| Birmingham Motor Works Limited | Real estate | 2017 |
| Birmingham Motorcycle Repair Ltd | Wholesale & retail | 2022 |
| Birmingham Motorist Centre Limited | Wholesale & retail | 2003 |
| Birmingham Motors Ltd | Wholesale & retail | 2024 |
| Birmingham Motors Sales UK Limited | Wholesale & retail | 2014 |
| Birmingham Move and Recover Ltd | Transport & logistics | 2025 |
| Birmingham Multi-Care Support Services Ltd | Health & social care | 1989 |
| Birmingham Museums Trading Limited | Wholesale & retail | 2001 |
| Birmingham Museums Trust | Arts & recreation | 2011 |
| Birmingham Muslim Foundation Ltd | Education | 2011 |
| Birmingham Muslim Funeral Services Limited | Other services | 2009 |
| Birmingham Neoglory Ltd | Wholesale & retail | 2015 |
| Birmingham Neuro & Mental Wellbeing Centre C.I.C. | Education | 2025 |
| Birmingham Newman University | Education | 2005 |
| Birmingham Norfolk House Ltd | Hospitality | 2023 |
| Birmingham Office Services Limited | Administrative & support | 2017 |
| Birmingham Oilfield Supply & Services Ltd | Wholesale & retail | 2018 |
| Birmingham Open Media Community Interest Company | Information & communication | 2013 |
| Birmingham Open Studios CIC | Administrative & support | 2024 |
| Birmingham Opera Company | Arts & recreation | 1984 |
| Birmingham Optical Group Limited | Manufacturing | 1972 |
| Birmingham Orchard House Ltd | Real estate | 2023 |
| Birmingham Ormiston Academy Theatre Limited | Arts & recreation | 2014 |
| Birmingham PA Forum Limited | Administrative & support | 2017 |
| Birmingham Packaging Ltd | Extraterritorial | 2010 |
| Birmingham Padel Limited | Arts & recreation | 2023 |
| Birmingham Parathyroid Centre LLP | | 2022 |
| Birmingham Parent Carer Forum C.I.C. | Information & communication | 2021 |
| Birmingham Park Gate Management Company Limited | Households | 2019 |
| Birmingham Parts Ltd | Wholesale & retail | 2026 |
| Birmingham PAT Testing LLP | | 2009 |
| Birmingham Pathfinder CIC | Health & social care | 2023 |
| Birmingham Pelican Ltd | Water & waste | 2021 |
| Birmingham Pest Control Ltd | Other services | 2008 |
| Birmingham Philharmonic Orchestra Productions Limited | Arts & recreation | 2022 |
| Birmingham Phoenix Limited | Arts & recreation | 2019 |
| Birmingham Physiocare Ltd | Other services | 2020 |
| Birmingham Playcare Network | Administrative & support | 2002 |
| Birmingham Plumbing Supplies Ltd | Wholesale & retail | 2021 |
| Birmingham Practical Accountancy Centre Ltd | Education | 2014 |
| Birmingham PRE School Ltd | Health & social care | 2014 |
| Birmingham Press Ltd | Information & communication | 2025 |
| Birmingham Prime Properties Ltd | Real estate | 2026 |
| Birmingham Printmakers | Arts & recreation | 2016 |
| Birmingham Properties Consultant Limited | Real estate | 2021 |
| Birmingham Properties Limited | Real estate | 2025 |
| Birmingham Property Auctions Limited | Real estate | 2012 |
| Birmingham Property Group Limited | Real estate | 2015 |
| Birmingham Property Holdings Ltd | Real estate | 2023 |
| Birmingham Property Improvements Ltd | Construction | 2020 |
| Birmingham Property Investments Limited | Real estate | 2014 |
| Birmingham Property Management and Lettings Ltd. | Real estate | 2016 |
| Birmingham Property Management Ltd | Real estate | 2025 |
| Birmingham Psychodrama Ltd. | Education | 2010 |
| Birmingham Publishing Group Ltd | Information & communication | 2013 |
| Birmingham PVT Limited | Transport & logistics | 2024 |
| Birmingham Radio Cars Limited | Transport & logistics | 1992 |
| Birmingham Railway Museum Limited | Administrative & support | 1988 |
| Birmingham Rathbone Society | Hospitality | 1985 |
| Birmingham RAW Pet Food Limited | Manufacturing | 2020 |
| Birmingham Real Estate Limited | Households | 2023 |
| Birmingham Recycling Services Ltd | Administrative & support | 2008 |
| Birmingham Refugee & Asylum Seeker Advice Service CIC | Professional & scientific | 2023 |
| Birmingham Removals Ltd | Water & waste | 2025 |
| Birmingham Render and Cladding Specialist Ltd | Other services | 2017 |
| Birmingham Renovation Ltd | Construction | 2020 |
| Birmingham Rental Properties Ltd | Real estate | 2020 |
| Birmingham REP Enterprises Limited | Arts & recreation | 1990 |
| Birmingham Reports Ltd | Professional & scientific | 2019 |
| Birmingham Resilience Education and Wellbeing Services CIC | Education | 2021 |
| Birmingham Restaurant Festival Ltd | Hospitality | 2023 |
| Birmingham Restaurant Group Limited | Professional & scientific | 2020 |
| Birmingham Rockets Basketball Club Limited | Arts & recreation | 2025 |
| Birmingham Rovers Basketball Club Community Interest Company | Arts & recreation | 2021 |
| Birmingham Rowing Club Limited | Arts & recreation | 1998 |
| Birmingham Safe Housing Ltd | Real estate | 2019 |
| Birmingham Safety Wear Limited | Manufacturing | 2007 |
| Birmingham Says NO CIC | Other services | 2019 |
| Birmingham Scaffold Ltd | Construction | 2021 |
| Birmingham Scaffolding Ltd | Construction | 2018 |
| Birmingham School Jobs Ltd | Information & communication | 2025 |
| Birmingham School Ltd | Education | 2014 |
| Birmingham School of English Ltd | Extraterritorial | 2021 |
| Birmingham Scrap Cars Limited | Wholesale & retail | 2025 |
| Birmingham Sealed Units Ltd | Manufacturing | 2022 |
| Birmingham Secure Locksmith Ltd | Other services | 2026 |