| Bristol Parkway North Limited | Professional & scientific | 1996 |
| Britannica UK Travel Ltd | Administrative & support | 2026 |
| Brockhill Limited | Financial services | 2020 |
| Bronzed Club Ltd | Other services | 2023 |
| Broochini Ltd | Administrative & support | 2013 |
| Brookwood Lettings and Management Ltd | Real estate | 2011 |
| Bruce Mazibuko Photography Ltd | Professional & scientific | 2024 |
| BSA Management & Consulting Limited | Other services | 2006 |
| Buddha Consultancy Services Ltd | Professional & scientific | 2014 |
| Bukhari Traders Ltd | Wholesale & retail | 2025 |
| Bullens Property Services Ltd | Construction | 2024 |
| Business Insight Solutions Limited | Administrative & support | 2024 |
| Business Risk Systems Assured Limited | Professional & scientific | 2017 |
| BUSINESSLINK4DEAF Ltd | Professional & scientific | 2008 |
| BUX Corrugated Containers Limited | Professional & scientific | 1951 |
| Buzz Broadcast Engineering Ltd | Information & communication | 2021 |
| BXB Digital Limited | Information & communication | 1997 |
| Byfleet Trailers (UK) Ltd | Manufacturing | 2019 |
| Bytt AI Limited | Information & communication | 2023 |
| C & B Group Limited | Financial services | 2021 |
| C and B Management Solutions Ltd | Professional & scientific | 2021 |
| C S L Support Services Limited | Professional & scientific | 2005 |
| C T Designs Limited | Professional & scientific | 2018 |
| C2E Consulting Limited | Professional & scientific | 2012 |
| C2SH Limited | Hospitality | 2022 |
| CAB Smith Limited | Manufacturing | 2017 |
| CABLES4LESS Limited | Wholesale & retail | 2021 |
| Cafe Ultimo Ltd | Hospitality | 2023 |
| Cakebrainz Ltd | Information & communication | 2023 |
| Calm + Chaos Ltd | Health & social care | 2024 |
| Calow Consultancy Limited | Professional & scientific | 2020 |
| Camara CU DE Toate Ltd | Wholesale & retail | 2025 |
| Cameramango Ltd | Information & communication | 2020 |
| Camper Tribe Limited | Administrative & support | 2019 |
| Capital Orthopaedics & Sports Medicine Limited | Health & social care | 2016 |
| Capital Orthopaedics & Sports Medicine London LLP | | 2018 |
| Cardrona Group Limited | Financial services | 2025 |
| Care Consortium (Biddulph) Limited | Health & social care | 1996 |
| Care Consortium Holdings Limited | Health & social care | 2018 |
| Care Link Plus Limited | Hospitality | 2017 |
| Career Outlook Limited | Administrative & support | 2003 |
| Caremaid Services Limited | Health & social care | 2014 |
| Carl Bianco Limited | Arts & recreation | 2007 |
| Carlo's Barber Shop Limited | Other services | 2008 |
| Caroline & Brian Limited | Real estate | 1964 |
| Carswell Communications Limited | Administrative & support | 2014 |
| Casa Montessori Ltd | Education | 2016 |
| Castle Bidco Home Loans Limited | Financial services | 2021 |
| Cater Oils Ltd | Water & waste | 2013 |
| Catholicplus Limited | Education | 2023 |
| Caxton Avenue 2001 Limited | Households | 2001 |
| Cazla Properties Limited | Real estate | 2020 |
| CBC Builders Ltd | Construction | 2024 |
| CBD Mountain Limited | Wholesale & retail | 2018 |
| CCP Maintenance Limited | Construction | 2018 |
| CD Concierge Ltd | Transport & logistics | 2023 |
| Cddh Aerospace Engineering Limited | Manufacturing | 2017 |
| CDK Designs Ltd | Professional & scientific | 2020 |
| Ceedee Mail Limited | Wholesale & retail | 1994 |
| Celestial Properties PVT Ltd | Construction | 2026 |
| Celex IT Limited | Information & communication | 2017 |
| Celu B2L Ltd | Real estate | 2024 |
| Celu Ltd | Real estate | 2022 |
| Ceniel Limited | Health & social care | 2019 |
| Certus Energy Limited | Wholesale & retail | 2025 |
| CFL Johns TMC Limited | Administrative & support | 2025 |
| CGT Operations Limited | Professional & scientific | 2025 |
| Chamberlains International Limited | Water & waste | 2017 |
| Chambers & Co Consultants Ltd | Professional & scientific | 2019 |
| Chambers of Fragrance Limited | Manufacturing | 2022 |
| Chance Chapman Scenery Ltd | Information & communication | 2020 |
| Charles Baker Building Limited | Construction | 2024 |
| Charlotte Olley Ltd | Professional & scientific | 2015 |
| Charlwood Project Consulting Ltd | Professional & scientific | 2020 |
| Chattman Ltd | Wholesale & retail | 2012 |
| Chaucer Way Estate 2000 Limited | Households | 2001 |
| Chemeyes Limited | Professional & scientific | 2012 |
| Chemflow Environmental Limited | Administrative & support | 2004 |
| Chemflow UK Limited | Administrative & support | 2015 |
| Chep UK Limited | Administrative & support | 1924 |
| Chertsey Mot's 4U Ltd | Wholesale & retail | 2004 |
| Chilbolton Residents Limited | Households | 1981 |
| Childs and Company Ltd | Real estate | 2025 |
| Chiltern Street (43A) Limited | Real estate | 2018 |
| Chorley Lodge Limited | Health & social care | 2018 |
| Christian Russell Ltd | Professional & scientific | 2013 |
| Christies Hair Designers Ltd | Other services | 2015 |
| Christopher Dean Editing Service Ltd | Information & communication | 2014 |
| Church Close (Addlestone) Residents Association Limited | Households | 1996 |
| Cimon Consulting Ltd | Information & communication | 2022 |
| Cinnamond Developments Limited | Construction | 2023 |
| Cipla (EU) Limited | Wholesale & retail | 2002 |
| Cisla Limited | Financial services | 2015 |
| Citimex Limited | Information & communication | 2010 |
| City Cabs and Cars Ltd | Transport & logistics | 2001 |
| Civic Studios International Limited | Information & communication | 2022 |
| Cj.K Property Ltd | Real estate | 2017 |
| CJM91 Properties Ltd | Real estate | 2024 |
| CKL Builders Limited | Construction | 2020 |
| Clapham Dine Ltd | Hospitality | 2025 |