| Blackfriars (Shrewsbury) Limited | Real estate | 1999 |
| Blackfriars and Greyfriars Management Limited | Households | 2012 |
| Blackkiteuav Limited | Professional & scientific | 2017 |
| Blacklock Bowlt Ltd | Professional & scientific | 2016 |
| Blackout Dance Camp C.I.C. | Administrative & support | 2021 |
| Blade Pens Ltd | Manufacturing | 2025 |
| Blake Land and Property Development Ltd | Real estate | 2026 |
| Blakeley Walk Management Company Limited | Households | 2008 |
| BLB Marketing Ltd | Wholesale & retail | 2012 |
| Blinding Performance Limited | Arts & recreation | 2019 |
| Block 1 Martello Quay Residents Company Limited | Households | 2003 |
| Block 2 Martello Quay Residents Company Limited | Households | 2003 |
| Blockchain Strategies Ltd | Information & communication | 2021 |
| Bloocow (UK) Limited | Information & communication | 2004 |
| Bloody Good Code Ltd | Information & communication | 2014 |
| Bloomin' Lovely Horticultural Therapy Ltd | Health & social care | 2023 |
| Bloomsbury Imaging Limited | Health & social care | 2014 |
| Blossom Academy Limited | Education | 2024 |
| Blossom at Home Childcare Ltd | Education | 2026 |
| Blossom Meadows (Buttershaw) Management Company Limited | Households | 2012 |
| Blossom Salon Shrewsbury Limited | Other services | 2025 |
| Blount Property Ltd | Real estate | 2024 |
| Blue Acoustic Ltd | Manufacturing | 2023 |
| Blue Bell Construction Limited | Construction | 2021 |
| Blue Glass Therapies Limited | Health & social care | 2021 |
| Blue Horizon Partnership LLP | | 2017 |
| Blue Jade 898 Limited | Hospitality | 2023 |
| Blue Line Tactix Ltd | Education | 2026 |
| Blue Oak Property Management Ltd | Real estate | 2026 |
| Blue Orchid Recruitment Ltd | Administrative & support | 2020 |
| Blue Orchids Cleaning Ltd | Other services | 2018 |
| Blue Space Homes Limited | Real estate | 2006 |
| Bluecoats Management Company Limited | Households | 2013 |
| Blueprint Outsourcing Consultancy Ltd | Professional & scientific | 2026 |
| Blueprint Sales Ltd | Administrative & support | 2021 |
| Blueprint Travel Media Limited | Information & communication | 2007 |
| BLUEPRINT3D Ltd | Other services | 2021 |
| Blues and Twos Property Services Ltd | Real estate | 2021 |
| Bluetree Mentoring CIC | Education | 2021 |
| Bluewater Plumbing & Heating (Shropshire) Ltd | Construction | 2026 |
| Bluewhaleclothinglondon Limited | Wholesale & retail | 2026 |
| Blurred Edge Ltd | Information & communication | 2012 |
| Blyces Ltd | Professional & scientific | 2023 |
| BM Corporate Holdings a Limited | Real estate | 2019 |
| BM Corporate Holdings B Limited | Real estate | 2022 |
| BM Corporate Holdings Limited | Real estate | 2013 |
| BM Partnership Management Limited | Real estate | 2017 |
| BMB Car & Commercials Ltd | Wholesale & retail | 2018 |
| BMC Profiles Limited | Information & communication | 2001 |
| BMD Construction Management Limited | Professional & scientific | 2019 |
| BMG Properties Limited | Real estate | 2025 |
| Bmhm Holdings Limited | Real estate | 2025 |
| Bnasuerte Ltd | Wholesale & retail | 2025 |
| Boat House Lodge Limited | Hospitality | 2022 |
| BOB Johnson Engineers Limited | Professional & scientific | 2007 |
| BOB Martin International Limited | Manufacturing | 2020 |
| BOB Smith Carpets Limited | Wholesale & retail | 2003 |
| Bobby Lockwood Ltd | Professional & scientific | 2019 |
| Bobby's Tacos Ltd | Hospitality | 2024 |
| Bodans (UK) Ltd | Wholesale & retail | 2010 |
| Bodelwyddan Management Company Limited | Real estate | 2023 |
| Body Health Limited | Other services | 2014 |
| Bodymetrics Nutrition Consultancy Ltd | Health & social care | 2013 |
| Boffey Bros Electrical Ltd | Construction | 2023 |
| Bogdar Ltd | Construction | 2021 |
| Bold WE ARE Limited | Professional & scientific | 2017 |
| Bomere Farm Limited | Agriculture & fishing | 2017 |
| Bonsai Group Limited | Hospitality | 2020 |
| Books Covered Limited | Professional & scientific | 2015 |
| Books on the Heath Ltd | Information & communication | 2023 |
| Booths Farm Residents Management Company Limited | Households | 2013 |
| Border Agricultural Engineering Ltd | Manufacturing | 2024 |
| Border Automotive Ltd | Wholesale & retail | 2008 |
| Border Essentials Limited | Wholesale & retail | 2023 |
| Border Garden Services Limited | Administrative & support | 2003 |
| Border Glamping Ltd | Hospitality | 2018 |
| Border Restoration Ltd | Manufacturing | 2013 |
| Border Textiles (Telford) Limited | Wholesale & retail | 2006 |
| Borderline Studios Limited | Professional & scientific | 2019 |
| Boreton Property Limited | Real estate | 2020 |
| Borger UK Limited | Wholesale & retail | 2006 |
| Boring Parties Ltd | Administrative & support | 2026 |
| Boroughs Holdings Limited | Financial services | 2019 |
| Bors Trans Ltd | Transport & logistics | 2019 |
| Bosk Cabinetworks Limited | Manufacturing | 2023 |
| Boss Serviced Accommodation Limited | Administrative & support | 2022 |
| Bott Cruise Architects Ltd | Professional & scientific | 2022 |
| Bottle Top Bar BUS Limited | Hospitality | 2021 |
| Boughey Trust Company Limited(The) | Health & social care | 1937 |
| Boujee Buns and Wings Ltd | Hospitality | 2024 |
| Boultons of Shropshire Limited | Transport & logistics | 2003 |
| Bounce Trauma Resolution Ltd | Health & social care | 2016 |
| Boundary Fields Management Company Ltd | Households | 2025 |
| Bouquet Bites Ltd | Hospitality | 2020 |
| Bourne Hotels Limited | Hospitality | 2014 |
| Bovington (1997) Limited | Households | 1996 |
| BOW Construction Limited | Construction | 1992 |
| Bowbrook Archers Limited | Arts & recreation | 2009 |
| Bowbrook Care Home Limited | Health & social care | 2024 |
| Bowbrook Homes Ltd | Real estate | 2022 |