| Augur Solutions Ltd | Information & communication | 2024 |
| Auriga Management Limited | Professional & scientific | 2021 |
| Auto Mobile Technician Ltd | Wholesale & retail | 2023 |
| Autodotbiography Limited | Information & communication | 2010 |
| Autotrader Broker Ltd | Wholesale & retail | 2019 |
| Avasar Ltd | Information & communication | 2020 |
| Avord Holdings Limited | Financial services | 2024 |
| Avord Limited | Information & communication | 2017 |
| Axillium Consulting Limited | Professional & scientific | 2007 |
| Axpero LLP | | 2026 |
| Axpero Services Ltd | Information & communication | 2019 |
| Aylata Properties Ltd | Real estate | 2022 |
| Azonic Limited | Administrative & support | 2018 |
| Azzuranova Limited | Professional & scientific | 2024 |
| B & R Steel Limited | Construction | 2008 |
| B2B Personnel Ltd | Wholesale & retail | 2021 |
| Baker Place Capital Limited | Professional & scientific | 2023 |
| Baraka Community Partnerships | Health & social care | 2009 |
| Barnes's Barnets Ltd | Other services | 2020 |
| Barrettini Limited | Professional & scientific | 2008 |
| Bass Enterprise Ltd | Other services | 2023 |
| Baydrive Group Limited | Arts & recreation | 2002 |
| Bazely & Co Limited | Real estate | 2006 |
| Bazelyandcolegalltd Ltd | Professional & scientific | 2022 |
| BBQ BUD Ltd | Professional & scientific | 2021 |
| BDR Bespoke Gardens & Offices Limited | Construction | 2017 |
| Becky Riffel Ltd | Professional & scientific | 2025 |
| Bedfont Sports Limited | Arts & recreation | 2009 |
| Belltingfx Ltd | Arts & recreation | 2023 |
| BEN Morgan Ltd | Manufacturing | 2024 |
| Bence AEC Limited | Wholesale & retail | 2026 |
| Benjamin’S Ltd | Hospitality | 2020 |
| Berlin Europe Ltd | Professional & scientific | 2010 |
| Berries Properties Limited | Real estate | 2023 |
| Bgsm Properties Limited | Real estate | 2019 |
| Bhuller Investments Ltd | Construction | 2020 |
| Big Shoes to Fill Limited | Administrative & support | 2025 |
| BIT Consultancy (U.K) Limited | Information & communication | 2022 |
| Bjsl Training Ltd | Education | 2024 |
| Blinkinc Ltd | Information & communication | 2011 |
| Bliss Productions Ltd | Information & communication | 2022 |
| Bluefree Ltd | Construction | 2000 |
| BMA Surrey Limited | Wholesale & retail | 2018 |
| BML Brickwork & Builders Ltd | Construction | 2021 |
| Bmsc Limited | Construction | 2014 |
| Boat Mate Limited | Manufacturing | 2005 |
| Bordo Trading Ltd | Transport & logistics | 2017 |
| Borela Ltd | Information & communication | 2015 |
| Boultbees Bulbs Ltd | Construction | 2022 |
| Boyes Architectural Design Ltd | Professional & scientific | 2018 |
| Boyes Manto Ventures Limited | Extraterritorial | 2025 |
| BPF Rotating Equipment Consultants Ltd | Professional & scientific | 2026 |
| BPS SW Ltd | Other services | 2026 |
| Bracondale Homes Ltd | Real estate | 2018 |
| Brainstorm Films Ltd | Information & communication | 2009 |
| Brana Consultancy Services Ltd | Professional & scientific | 2015 |
| Branto Active Limited | Other services | 2025 |
| Bridle Booth Limited | Administrative & support | 2024 |
| Bright SON Property Ltd | Real estate | 2024 |
| BRO! Clothing Ltd. | Manufacturing | 2011 |
| Bromont Quality Limited | Professional & scientific | 2014 |
| Brooklands Chauffeurs Ltd | Transport & logistics | 2015 |
| Brunch Life Limited | Hospitality | 2021 |
| Build & Maintenance Limited | Water & waste | 2020 |
| Build and Scale Ltd | Professional & scientific | 2021 |
| Burtchaell Properties Limited | Administrative & support | 2017 |
| Business Connections Live Limited | Information & communication | 2011 |
| Butchers Property Developments Limited | Real estate | 2018 |
| Byron Bay Software Contracts Limited | Professional & scientific | 1998 |
| Bytec Services Ltd | Administrative & support | 2016 |
| BZ Engineering Limited | Wholesale & retail | 2011 |
| C H Skips Limited | Water & waste | 2020 |
| C J Howard Electrical Contractors Limited | Construction | 2007 |
| C York Ltd | Information & communication | 2015 |
| C-B Building and Roofing Ltd | Construction | 2023 |
| C.M Co Trading Ltd | Wholesale & retail | 2022 |
| CA Software Ltd | Information & communication | 2015 |
| Calibreit Consulting Ltd | Professional & scientific | 2016 |
| Cannon Carpets and Flooring Limited | Construction | 2018 |
| Cannon Consulting Ltd | Professional & scientific | 2025 |
| CAP Sunbury Ltd | Wholesale & retail | 2010 |
| Capabilityclarke Ltd | Administrative & support | 2020 |
| Cape Grips Ltd | Information & communication | 2024 |
| Capital Republic Ltd | Manufacturing | 2010 |
| Car Ninja Ltd | Wholesale & retail | 2024 |
| Carmate (Ashford) LLP | | 2007 |
| Casaloma Ltd | Wholesale & retail | 2025 |
| Cascading Leisure Centre Limited | Arts & recreation | 2005 |
| Celestion IT Limited | Information & communication | 2025 |
| Ceylon Coir Products Ltd | Wholesale & retail | 2018 |
| CGB Networks Limited | Construction | 2021 |
| Cgrids Ltd | Professional & scientific | 2008 |
| Chameleon Film Services Ltd | Information & communication | 2022 |
| Chardikala Scaffolding Ltd | Construction | 2021 |
| Charlton Landscapes Limited | Administrative & support | 2025 |
| Charterhall Associates Limited | Financial services | 2005 |
| Chesbury Limited | Administrative & support | 1999 |
| Child First Consultancy Ltd. | Health & social care | 2021 |
| Chloe Eden Artistry Ltd | Other services | 2024 |
| Churchfield Place (Shepperton) Management Company Limited | Households | 2001 |