| Avicenna Medical Limited | Education | 2008 |
| Aydm Ltd | Real estate | 2020 |
| Ayur Property Management Ltd | Real estate | 2024 |
| B.T.A Food & Wine Ltd | Wholesale & retail | 2024 |
| Babolat VS UK Limited | Wholesale & retail | 1998 |
| Bach Flower Remedies Limited | Manufacturing | 1993 |
| Backflip Gymnastics Limited | Arts & recreation | 2008 |
| Baddie Limited | Real estate | 2020 |
| Battlemanor Holdings Limited | Hospitality | 2023 |
| Baybreeze Properties Ltd | Real estate | 2022 |
| Beer and Beyond Ltd | Wholesale & retail | 2020 |
| Belgian Beer Import Limited | Administrative & support | 2001 |
| Bellbourne House Limited | Wholesale & retail | 1993 |
| Bentley Oliver Limited | Wholesale & retail | 2013 |
| Bethel Oasis of Jesus Christ | Other services | 2019 |
| Beyondd Ltd | Information & communication | 2025 |
| Beyourownhero Ltd | Transport & logistics | 2017 |
| Bhagyamma & Sons Limited | Information & communication | 2025 |
| Bhuchar Boulevard Limited | Arts & recreation | 2017 |
| Biran Consulting Ltd | Professional & scientific | 2017 |
| Blackstone Property Group Ltd | Real estate | 2018 |
| Blossom Services Limited | Health & social care | 2018 |
| Blue PM Limited | Arts & recreation | 1993 |
| Blues Match Limited | Administrative & support | 2007 |
| BMK (the Manor) Ltd | Real estate | 2019 |
| BMS Removals Limited | Administrative & support | 2015 |
| Boldmove.Tv Ltd | Information & communication | 2024 |
| Books Under Thinking Fearless Ltd | Information & communication | 2023 |
| Bowden Consultancy Limited | Professional & scientific | 2015 |
| Boyd Morison Limited | Construction | 2022 |
| Brainology Ltd | Professional & scientific | 2019 |
| Bramley Hedge Environmental Services Limited | Administrative & support | 2003 |
| Branded Mall Ltd | Wholesale & retail | 2021 |
| Brasted Holdings Limited | Financial services | 2026 |
| Brasted Investments (Anerley) Limited | Financial services | 2025 |
| Brayford Axon Media Limited | Information & communication | 2011 |
| Breastfeeding London Ltd | Education | 2018 |
| Bridge House Properties Ltd | Real estate | 2017 |
| Bright Futures Home Care Ltd | Administrative & support | 2026 |
| Britmed Ltd | Wholesale & retail | 2022 |
| Broadway College Limited | Education | 2010 |
| Brockman Richards Holt Ltd | Real estate | 2014 |
| Broden Media Limited | Information & communication | 2000 |
| Brokertalk Limited | Administrative & support | 2009 |
| Brookfields Consultancy Limited | Extraterritorial | 2022 |
| Brookvex Academy Limited | Education | 2010 |
| Brookvex Communications Limited | Information & communication | 2010 |
| Brookvex Electrical Limited | Professional & scientific | 2013 |
| Brookvex Security Limited | Administrative & support | 2010 |
| Budi Worldwide Ltd | Wholesale & retail | 2025 |
| Buildxcape Ltd | Construction | 2025 |
| Burnt Oak (Cameron Court) Limited | Households | 1976 |
| Business & Industrial Company Limited | | 1985 |
| BVX Property Holdings Ltd | Professional & scientific | 2014 |
| C. a. Webber Limited | Professional & scientific | 2003 |
| Cannizaro Wealth Management LLP | | 2026 |
| Capital Rainbow Groups Ltd | Wholesale & retail | 2017 |
| Cappagh Aggregates Limited | Water & waste | 2002 |
| Cappagh Browne Limited | Construction | 2010 |
| Cappagh Contractors Construction (London) Limited | Construction | 1973 |
| Cappagh Developer Services Limited | Construction | 2017 |
| Cappagh Investments Limited | Real estate | 2008 |
| Cappagh Lining Limited | Water & waste | 2022 |
| Cappagh Lining Solutions Limited | Water & waste | 2022 |
| Cappagh Properties Limited | Real estate | 1991 |
| Cappagh Public Works Limited | Water & waste | 1988 |
| Cappagh Utilities Limited | Construction | 2002 |
| Car Craft (Wimbledon) Ltd | Wholesale & retail | 2015 |
| Cargo King (UK) Limited | Administrative & support | 2010 |
| Carmelita London Limited | Wholesale & retail | 2025 |
| Cashprint Limited | Arts & recreation | 1989 |
| Catalyst Transformation Partners Limited | Administrative & support | 2025 |
| Catesby-Lewis Limited | Real estate | 2020 |
| Cave Products Limited | Wholesale & retail | 2009 |
| Cavell Laundry Ltd | Other services | 2018 |
| Cavendish W4 Ltd | Real estate | 2022 |
| Caxton Homes London Limited | Real estate | 2019 |
| Cedar Court(Wimbledon)Limited | Other services | 1957 |
| Centre for Breastfeeding Education and Research | Education | 2020 |
| Centrodoc Limited | Information & communication | 2010 |
| Cepheus Carriage Ltd | Transport & logistics | 2024 |
| CG Dwellings Ltd | Real estate | 2025 |
| Changing Cities Limited | Professional & scientific | 2012 |
| Chapter 2 NBR Consulting Ltd | Information & communication | 2024 |
| Charism Consultants Limited | Professional & scientific | 2006 |
| Charles Cadogan Consulting Limited | Professional & scientific | 2021 |
| Charlesworth Affiliate Services Ltd | Professional & scientific | 2017 |
| Chaucer House Freehold Limited | Households | 2024 |
| Chaucer House Williams Place Management Company Limited | Households | 2024 |
| Chewific Limited | Wholesale & retail | 2020 |
| Chippers of Cockfosters Limited | Hospitality | 2013 |
| Chiswick Solutions Limited | Information & communication | 2004 |
| Choicetitle Property Management Limited | Households | 1995 |
| Chris Letts Plumbing and Heating Limited | Construction | 2023 |
| Christopher John Nicola Limited | Administrative & support | 2007 |
| City Tree Ltd | Other services | 2019 |
| CJ Group Surrey Limited | Financial services | 2020 |
| CKS Holdings Ltd | Administrative & support | 2016 |
| Cleanapp Limited | Administrative & support | 2023 |
| Cleverlee Ltd | Information & communication | 2020 |