| Bailey Building Projects Limited | Construction | 2015 |
| Baldwin IT Support & Solutions Limited | Information & communication | 2015 |
| Ballyhoo Media Limited | Professional & scientific | 2012 |
| Bangons Electrical Services Ltd | Construction | 2010 |
| Barham and Gilbert Construction Limited | Construction | 2019 |
| Bath Room (Yorkshire) Ltd | Administrative & support | 2017 |
| Batley D.I.Y. Centre Limited | Wholesale & retail | 1985 |
| Bay Ventures 2018 Limited | Hospitality | 2018 |
| BE Fabulous Limited | Wholesale & retail | 2014 |
| Bear Installations Ltd | Other services | 2016 |
| Beast Enterprises Limited | Information & communication | 2009 |
| Beckhampton Ltd | Information & communication | 2015 |
| Being Whole NOW Ltd | Health & social care | 2020 |
| Belltops Roofing Specialists Ltd | Construction | 2015 |
| Berrisons of Brighton Ltd | Wholesale & retail | 2024 |
| Bespoke Living Hertfordshire Limited | Construction | 2019 |
| Bespoke Worker Limited | Wholesale & retail | 2015 |
| Best Cleaning 4U Ltd | Other services | 2017 |
| Best Hospitality Limited | Hospitality | 2014 |
| Beta Building Services Limited | Construction | 2015 |
| BHC Plumbing and Heating Ltd | Other services | 2018 |
| Big BEN Products Ltd. | Administrative & support | 2016 |
| Bigfoot Logistics Limited | Transport & logistics | 2016 |
| Billericay Brewing Company Ltd | Manufacturing | 2012 |
| Bishop & Young Ltd | Hospitality | 2009 |
| Bitemega Ltd | Hospitality | 2017 |
| Blackmore Consultancy Ltd | Professional & scientific | 2018 |
| Blackwell and Garner Ltd | Hospitality | 2020 |
| Blackwell Roofing Services Limited | Construction | 2017 |
| Blackwood Automotive Repairs Limited | Wholesale & retail | 2011 |
| Blue Bubble Books Limited | Information & communication | 2018 |
| Blue DOT Adventure Limited | Arts & recreation | 2009 |
| Blue Gecko Cleaning Ltd | Other services | 2012 |
| BLUE24 Limited | Construction | 2018 |
| BOILERS2AC Ltd | Construction | 2019 |
| Boss Gym Ltd | Arts & recreation | 2020 |
| Boulton and Hornsey Ltd | Manufacturing | 2023 |
| Bourne Home Furniture Ltd | Wholesale & retail | 2018 |
| Boutique Stone Ltd | Wholesale & retail | 2020 |
| Brand Sixteen Eateries Limited | Hospitality | 2019 |
| Brandvital Limited | Manufacturing | 1987 |
| Brew Coffee & Kitchen Ltd | Hospitality | 2018 |
| Bristol Movement Space Limited | Arts & recreation | 2017 |
| Brown Bear's Coffee House Ltd | Hospitality | 2019 |
| Build Collective Limited | Professional & scientific | 2005 |
| Build-It Builders Ltd | Construction | 2022 |
| BUILDERSEXPERTS1 Ltd | Construction | 2015 |
| Bumbles Hair Limited | Other services | 2004 |
| Burgervore Limited | Hospitality | 2022 |
| Business Steps Limited | Administrative & support | 2013 |
| Bustagut Recruitment Limited | Administrative & support | 2007 |
| C I Project Solutions Limited | Professional & scientific | 2012 |
| C&G Advertising Services Limited | Construction | 2011 |
| CA Marketing Solutions Limited | Professional & scientific | 2016 |
| CAB Productions Ltd | Administrative & support | 2014 |
| Cable I.T (UK) Limited | Information & communication | 2007 |
| Caer Health Services Limited | Health & social care | 2002 |
| CAL Bain Ltd | Professional & scientific | 2013 |
| Calder Brick, Stone and Clay Quarry Ltd | Mining & quarrying | 2019 |
| Camping & Leisure World Limited | Wholesale & retail | 2001 |
| Canterbury Business Advisors Ltd | Professional & scientific | 2015 |
| Capa Solutions Limited | Information & communication | 2016 |
| Care Agency Media Ltd | Administrative & support | 2018 |
| Care Staff Services Ltd | Health & social care | 2015 |
| Carp & Coarse Fishing Holidays Limited | Arts & recreation | 1999 |
| Carter & Shields Ltd | Other services | 2017 |
| Castlemeare Ltd | Other services | 2022 |
| Caurum Construction Ltd | Households | 2018 |
| Cavell Hairdressing Ltd | Other services | 2022 |
| CB Network Solutions Limited | Information & communication | 2010 |
| Cb-S&C Ltd | Health & social care | 2019 |
| CF Repbyrep Ltd | Arts & recreation | 2020 |
| CFC Consult Limited | Administrative & support | 2015 |
| CH Garden Spaces Ltd | Administrative & support | 2018 |
| Chambers Self Storage Ltd | Real estate | 2010 |
| Channel Connect Limited | Professional & scientific | 2014 |
| Chapel Garden Design Ltd | Construction | 2020 |
| Chaps Group Limited | Wholesale & retail | 2015 |
| Charles Geddes Carpets Limited | Wholesale & retail | 2015 |
| Chartermark Construction Management Services Limited | Public administration | 2014 |
| Chartwell Global Limited | Manufacturing | 2017 |
| Chemi-Call Ltd | Wholesale & retail | 2003 |
| Cheshire East Security Ltd | Administrative & support | 2019 |
| Chester James Limited | Professional & scientific | 2017 |
| Chicken MAY Ltd | Hospitality | 2014 |
| Chris Howe Ceramics Limited | Health & social care | 2001 |
| Church Meadow Yorkshire Ltd | Hospitality | 2018 |
| Circles Health & Wellbeing Ltd | Health & social care | 2019 |
| Cirencester Home Improvements Ltd | Construction | 2011 |
| Cirrusx Limited | Information & communication | 2022 |
| City Driver Training Limited | Education | 2021 |
| CJ Deliveries Ltd | Transport & logistics | 2013 |
| CL Plumbing & Heating Ltd | Construction | 2019 |
| Claire Simpson Interiors Ltd | Professional & scientific | 2013 |
| Clayton Construction (East Anglia) Limited | Construction | 2014 |
| Clean Genie Banbury Limited | Administrative & support | 2018 |
| Clear Commercial Solutions Limited | Information & communication | 2018 |
| Clearview Windows Cardiff Limited | Construction | 2016 |
| Clephane Consulting Ltd | Information & communication | 2016 |
| Clever HR Ltd. | Administrative & support | 2014 |