| Buildsphere Constructors Ltd | Construction | 2024 |
| Bulksave Wholesale Foods Limited | Wholesale & retail | 2018 |
| Bull&Bear Trading Ltd | Education | 2025 |
| Burger N Tea Limited | Hospitality | 2021 |
| Burlington Barber Ltd | Other services | 2021 |
| Burlington Court (Surbiton) Limited | Households | 2000 |
| Burwin Property Ltd | Real estate | 2022 |
| Business Insystems Limited | Professional & scientific | 2024 |
| Busprosys Consulting Ltd | Professional & scientific | 2018 |
| Butcher Decs Limited | Construction | 2020 |
| Butlers (Royston) Limited | Transport & logistics | 2012 |
| Butte Enterprises Limited | Wholesale & retail | 2015 |
| Bvams Ltd Limited | Professional & scientific | 2013 |
| Bwamanga Sustainable Investment Advisors Limited | Other services | 2011 |
| Bwintas Ltd | Real estate | 2025 |
| Byfleet Holdings Limited | Real estate | 1960 |
| C & S Processing Limited | Manufacturing | 2006 |
| C J Cole Limited | Information & communication | 2005 |
| C Jane Care Services Ltd | Health & social care | 2020 |
| C Y Events Ltd | Hospitality | 2022 |
| C.C.(Surbiton)Management Co Limited | Real estate | 1970 |
| C.E.Group Limited | Manufacturing | 2016 |
| C360 Live Ltd | Hospitality | 2023 |
| Cabotz Ltd | Financial services | 2025 |
| Cabstop Taxi Repairs Limited | Transport & logistics | 2014 |
| Cachet Kids Limited | Wholesale & retail | 2004 |
| CAE Fidelity Ltd | Arts & recreation | 2019 |
| Cafe Jovi Ltd | Hospitality | 2024 |
| Cafe NIK Naks Limited | Hospitality | 2015 |
| Cafe Rosa Ltd | Hospitality | 2025 |
| Caithness & Co Limited | Financial services | 1974 |
| Cajun HR Ltd | Professional & scientific | 2011 |
| Calabay Environmental Limited | Manufacturing | 2005 |
| Calbrio Limited | Information & communication | 2024 |
| Calibre Consultancy Limited | Administrative & support | 1995 |
| Callabcreative Ltd | Professional & scientific | 2025 |
| Callcut West Limited | Professional & scientific | 1986 |
| Calvert Petrophysics Limited | Mining & quarrying | 2023 |
| Cambridge Park Court Residents Association Limited | Households | 1976 |
| Camilla Green Ltd | Health & social care | 2014 |
| Camolite Ltd | Information & communication | 2021 |
| Campbell Acquisitions Limited | Real estate | 2012 |
| Candidate Source Limited | Administrative & support | 2010 |
| Canirecycle Limited | Information & communication | 2022 |
| Canopy Code Ltd | Information & communication | 2026 |
| Canscan Ltd | Extraterritorial | 2025 |
| Cape & Dantzig Ltd | Professional & scientific | 2022 |
| Cape Futura Ltd | Professional & scientific | 2024 |
| Capital Direct Ltd | Wholesale & retail | 2019 |
| Capital Engineering Consultancy Ltd | Construction | 2020 |
| Capra Falconeri Ltd | Information & communication | 2015 |
| Captain Goods Ltd | Wholesale & retail | 2025 |
| Car Wash and Valets Ltd | Other services | 2025 |
| CAR4U Parts Limited | Wholesale & retail | 2019 |
| Cardinal & Kohain Ltd | Extraterritorial | 2018 |
| Care Compass Ltd | Health & social care | 2026 |
| Care in Time Ltd | Health & social care | 2022 |
| Carl Chaplin Consulting Ltd | Professional & scientific | 2019 |
| Carlyle Court Flat 56 Limited | Real estate | 2026 |
| Carmella Patisserie Limited | Manufacturing | 2022 |
| Carna Software Ltd. | Information & communication | 2023 |
| Caroline Clinic London Ltd | Health & social care | 2025 |
| Caroline Court (Surbiton) Residents Association Limited | Households | 1968 |
| Caroline Davison Nutrition Limited | Health & social care | 2022 |
| Carpetmania (Surbiton) Limited | Wholesale & retail | 2011 |
| Carrow Design Limited | Professional & scientific | 2005 |
| Carry App Limited | Information & communication | 2026 |
| Casa Vision Ltd | Construction | 2023 |
| Casapro International Ltd | Real estate | 2024 |
| Cassia 1 Holdings Limited | Construction | 2020 |
| Cassia Lili Ltd | Wholesale & retail | 2023 |
| Castle Stars Educational Day Nursery Limited | Education | 2013 |
| Castro Lage Ltd | Health & social care | 2024 |
| Catalyst Transformation Group Ltd | Professional & scientific | 2015 |
| Catanoo Technologies Ltd | Professional & scientific | 2025 |
| Catherine Road Residents (Surbiton) Limited | Households | 1973 |
| Catherine’S Deep Investments Ltd | Professional & scientific | 2024 |
| Catt Instincts Ltd | Professional & scientific | 2023 |
| Cbec Ltd | Construction | 2010 |
| CDM Exchange Ltd | Wholesale & retail | 2025 |
| CED Consulting Limited | Administrative & support | 2010 |
| Cedars Resident Management Limited(The) | Households | 1986 |
| Cellvital AI Ltd | Manufacturing | 2026 |
| Celtic Touch Ltd | Wholesale & retail | 2025 |
| CEM Bookkeeping & Consultancy Ltd | Professional & scientific | 2017 |
| Censea Services Limited | Professional & scientific | 2018 |
| Centered Care Cleaning Ltd | Administrative & support | 2025 |
| Ceramic Solutions London Ltd | Professional & scientific | 2013 |
| Cerberus Group (Holdings) Limited | Financial services | 2023 |
| Cerberus Maintenance Ltd | Construction | 2025 |
| Cetex Energy Limited | Financial services | 2026 |
| Ceylon Silks Ltd | Wholesale & retail | 2012 |
| CG Bluesky Ltd | Construction | 2019 |
| CGD Handy Property Services Ltd | Construction | 2026 |
| CGD Mechanical Services Limited | Construction | 2018 |
| CH4 Accounts Limited | Construction | 2011 |
| Chain Enable Ltd | Information & communication | 2018 |
| Chalford Estates Limited | Real estate | 1994 |
| Chambers Farm Flowers Limited | Agriculture & fishing | 2017 |
| Change Business Solutions Ltd | Professional & scientific | 2019 |