| Bay Harvest Ltd | Wholesale & retail | 2025 |
| Beauteous Beauty Limited | Wholesale & retail | 2024 |
| Beauteous Health Limited | Wholesale & retail | 2024 |
| Beauteous Skin Limited | Wholesale & retail | 2024 |
| BEE a Community Services Community Interest Company | Administrative & support | 2026 |
| Bella Cannoli Ltd | Hospitality | 2025 |
| Belts Forge Limited | Wholesale & retail | 2025 |
| Bidex Recruitment Services Ltd | Administrative & support | 2021 |
| Billiza Limited | Professional & scientific | 2025 |
| Bizeon Ltd | Wholesale & retail | 2025 |
| Bizlyst Limited | Information & communication | 2018 |
| BJ Accounts Services Ltd | Professional & scientific | 2021 |
| Black and Being Essex CIC | Health & social care | 2024 |
| Blackruby Technologies Limited | Information & communication | 2021 |
| Blaize Luxury Limited | Arts & recreation | 2023 |
| Bloomtree Technologies Ltd | Information & communication | 2022 |
| Blue MAG Ltd | Construction | 2019 |
| Blueridge Group Limited | Information & communication | 2026 |
| Blume Trading Ltd | Wholesale & retail | 2021 |
| Body BUD Ltd | Wholesale & retail | 2022 |
| Bold Services Management Ltd | Professional & scientific | 2026 |
| Bookatechy Limited | Information & communication | 2019 |
| Boparai Express Freight Limited | Construction | 2025 |
| Brahman Bhavan Investments Ltd | Financial services | 2020 |
| Briar Mechanical Services Limited | Construction | 2004 |
| Brickfold Capital Ltd | Financial services | 2026 |
| Bright Sight Management Ltd | Administrative & support | 2011 |
| Brightwell Brands Ltd | Wholesale & retail | 2026 |
| Brilliant Tots Limited | Health & social care | 2023 |
| Briton Homes Limited | Real estate | 2025 |
| Broadcast SOLUTIONS4U Ltd | Information & communication | 2022 |
| Broadway Consultants (London) Ltd | Real estate | 2023 |
| Bronze Apps UK Limited | Information & communication | 2026 |
| Buckle Management & Holdings Limited | Financial services | 1967 |
| Buckle Shipping Limited | Extraterritorial | 1986 |
| Buckle Shipping(Ipswich)Limited | Transport & logistics | 1971 |
| Build Your Fitness UK Ltd | Wholesale & retail | 2023 |
| Buildingflow Limited | Information & communication | 2022 |
| Bulk Bay Logistics Ltd | Wholesale & retail | 2025 |
| Burst FIX Ltd | Construction | 2026 |
| Butt&Jutt Enterprises Limited | Transport & logistics | 2018 |
| Bygfut Media Limited | Information & communication | 2015 |
| Bytehatch Limited | Wholesale & retail | 2025 |
| C.E Capital Holdings Ltd | Financial services | 2024 |
| C.E Company Services Ltd | Manufacturing | 2024 |
| C5M Ltd | Information & communication | 2022 |
| Cadlos Design Ltd | Administrative & support | 2021 |
| Cal-I Jonel Arts Ltd | Education | 2022 |
| Calls That Count Limited | Administrative & support | 2009 |
| Camxpert Ltd | Wholesale & retail | 2025 |
| Canyon Digital Marketing Limited | Administrative & support | 2025 |
| Capsset Limited | Real estate | 2020 |
| Capture My Events Ltd | Administrative & support | 2023 |
| Car Valeting & Trade Ltd | Wholesale & retail | 2026 |
| Carap UK Limited | Administrative & support | 2025 |
| Carbonflow AI Limited | Information & communication | 2026 |
| Casting Hub Ltd | Information & communication | 2025 |
| Cawe Management Limited | Professional & scientific | 2010 |
| Cedars House Christian (International) Limited | Other services | 2011 |
| CENTRAL33 Ltd | Hospitality | 2025 |
| Centx Ltd | Hospitality | 2020 |
| Chadwell Heath Community Centre | Health & social care | 2013 |
| Chadwell Tuition Centre Ltd | Education | 2020 |
| Chaps F&B Ltd | Manufacturing | 2021 |
| Charismatic Ltd | Wholesale & retail | 2023 |
| Chase Side Properties Limited | Real estate | 2026 |
| Chaudhary Brickwork Limited | Construction | 2023 |
| Chiado Music Group Ltd | Information & communication | 2025 |
| Chichester Skin Clinic Limited | Health & social care | 2025 |
| Chigwell Lawn Tennis Club Limited | Professional & scientific | 1956 |
| Children & Authors’ Literary Fanfare and Events (Calf-Events) C.I.C. | Education | 2025 |
| Chouhan Construction Ltd | Construction | 2016 |
| Cipher Bricks Limited | Information & communication | 2025 |
| City Drinks Wholesale Ltd | Wholesale & retail | 2023 |
| CKA Hetma Limited | Wholesale & retail | 2025 |
| Clarity-Ec Ltd | Professional & scientific | 2018 |
| Clarivo Information Technologies Ltd | Information & communication | 2026 |
| Clear Route Immigration Ltd | Other services | 2023 |
| Clipty Ltd | Information & communication | 2025 |
| Closeview Media Ltd | Professional & scientific | 2024 |
| COAST2COAST Property Solutions Limited | Administrative & support | 2026 |
| Cognitive Radiant Craft Ltd | Wholesale & retail | 2022 |
| Collar and Cuffs London Trading Limited | Wholesale & retail | 2016 |
| Collectivepaperco Ltd | Manufacturing | 2025 |
| Comfort Zion Pearl Ltd | Professional & scientific | 2011 |
| Comfy Stays for YOU Ltd | Real estate | 2025 |
| Commercial Window Cleaning Limited | Administrative & support | 2012 |
| Company Services Network Limited | Information & communication | 2004 |
| Confident Career Switch Ltd | Professional & scientific | 2024 |
| Copeland Top Care Solutions Limited | Health & social care | 2025 |
| Core Star Traders Ltd | Wholesale & retail | 2023 |
| Corpacasa Ltd | Real estate | 2025 |
| Cosplay Warden Ltd | Wholesale & retail | 2025 |
| Cotton LEE Limited | Wholesale & retail | 2023 |
| Craftlabstudiouk Limited | Wholesale & retail | 2025 |
| Craufurd Management Limited | Professional & scientific | 2010 |
| Credit Controlled Limited | Administrative & support | 2025 |
| Crizil Ltd | Wholesale & retail | 2022 |
| Crossland Ecology Ltd | Professional & scientific | 2024 |
| Crowncart Trading Ltd | Wholesale & retail | 2025 |