| Bubble & Squeak Cleaning Ltd | Administrative & support | 2018 |
| Bubbulls Ltd | Wholesale & retail | 2025 |
| Buchhalter.Pro Ltd | Information & communication | 2023 |
| Buckeye Services Limited | Professional & scientific | 2026 |
| Budget Estimate Limited | Professional & scientific | 2004 |
| Buffalo Community Group CIC | Information & communication | 2025 |
| Build IT With ROB Ltd | Construction | 2023 |
| Builders Beams R US Ltd | Manufacturing | 2024 |
| Building Construction Partnership Group Ltd | Financial services | 2019 |
| Building Construction Partnership Holdings Ltd | Financial services | 2025 |
| Building Construction Partnership Limited | Construction | 2011 |
| Building Contractor - Marketing Ltd | Construction | 2006 |
| Building Resilience Limited | Education | 2014 |
| Buildtex Ltd | Other services | 2007 |
| Bulk Vehicle Parts Ltd | Wholesale & retail | 2024 |
| Bull Flag Properties Limited | Real estate | 2019 |
| Bulsara Consulting Ltd | Professional & scientific | 2025 |
| Bumble & Rocket Investments Ltd. | Professional & scientific | 2021 |
| Bundaster Limited | Wholesale & retail | 2017 |
| Buns & Guns Ltd | Hospitality | 2026 |
| Burger Hubb Ltd | Hospitality | 2021 |
| Burn Vale Holdings Limited | Real estate | 1997 |
| Burratattack Ltd | Hospitality | 2025 |
| Burrow Roofing Ltd | Construction | 2017 |
| Bursary Management Solutions Limited | Professional & scientific | 2024 |
| Business DAD Ltd | Professional & scientific | 2023 |
| Business Direct Germany Limited | Professional & scientific | 2009 |
| Business Guardians Ltd | Administrative & support | 2019 |
| Butane Ltd | Professional & scientific | 2020 |
| Butlers Driver Solutions Ltd | Transport & logistics | 2026 |
| Butt & Hobbs Limited | Wholesale & retail | 2005 |
| Butter & Oats Ltd | Transport & logistics | 2020 |
| Butterfly Aesthetics (Wakefield) Ltd | Health & social care | 2019 |
| Butterley Investco Limited | Financial services | 2024 |
| Button TM Ltd | Construction | 2024 |
| Butucelu Ltd | Transport & logistics | 2024 |
| Buxted Chicken Limited | Other services | 1995 |
| Buynexa Limited | Wholesale & retail | 2025 |
| BVK Ltd | Real estate | 2019 |
| BVR Engineering Ltd | Professional & scientific | 2026 |
| BW Hair Ltd | Other services | 2025 |
| BW Installations Limited | Construction | 2024 |
| BWH4 Limited | Health & social care | 2023 |
| BX2 Services Ltd | Administrative & support | 2026 |
| BY Direct CS Limited | Wholesale & retail | 2024 |
| BY Julian Limited | Professional & scientific | 2008 |
| Byrom and Bird Limited | Hospitality | 2025 |
| Bytesatwork Limited | Administrative & support | 2004 |
| C & C Developments (York) Ltd | Construction | 2020 |
| C & C Holdings (York) Ltd | Real estate | 2022 |
| C & H Digging and Gritting Ltd | Administrative & support | 2021 |
| C & K Access Platforms Ltd | Other services | 2018 |
| C and S Care Ltd | Education | 2024 |
| C G Hill Holdings Ltd | Construction | 2019 |
| C Gomersall Electrical Ltd | Construction | 2022 |
| C H Roofing (Leeds) Ltd | Construction | 2018 |
| C J Pallets Ltd | Manufacturing | 2011 |
| C Mcintosh Limited | Financial services | 2021 |
| C P Engineering & Design Ltd | Professional & scientific | 2024 |
| C Price & Sons (Light Demolition & Recycling) Ltd | Construction | 2025 |
| C R Thermal Insulations Ltd | Manufacturing | 2012 |
| C S Media Services Ltd | Professional & scientific | 2024 |
| C W DIX Limited | Professional & scientific | 2012 |
| C Wherritt & Co Ltd | Real estate | 2025 |
| C&A Holmes Property Limited | Real estate | 2021 |
| C&B Entertainment Limited | Hospitality | 2025 |
| C&J Construction and Roofing Ltd | Construction | 2024 |
| C&M Learning Ltd | Professional & scientific | 2019 |
| C&S Howley Ltd | Real estate | 2022 |
| C&W Associates Ltd | Professional & scientific | 2021 |
| C. & R. Services Limited | Other services | 1980 |
| C. S. Consulting and Systems Ltd. | Professional & scientific | 2005 |
| C.B. Precast Flooring Limited | Construction | 2004 |
| C.L.M.Property Maintenance Ltd | Construction | 2025 |
| C.O.W.E. Developments Limited | Real estate | 2006 |
| C.R. Myton Limited | Construction | 1988 |
| C.V.S Recovery and Transportation Ltd | Transport & logistics | 2025 |
| C.Y.H. Limited | Hospitality | 2010 |
| C13 Audio Limited | Information & communication | 2015 |
| C2 Events Group Limited | Professional & scientific | 2016 |
| C2 Events Ltd | Administrative & support | 2004 |
| C2 Events Trustees Limited | Professional & scientific | 2024 |
| C2B Electrical Limited | Construction | 2024 |
| C2K Security Ltd | Administrative & support | 2024 |
| CAB Security Ltd | Administrative & support | 2018 |
| Cache Instrumentation Limited | Wholesale & retail | 2000 |
| CAD IT UP Ltd | Professional & scientific | 2021 |
| Caddick Civil Engineering Limited | Construction | 2006 |
| Caddick Construction (Midlands) Limited | Construction | 2022 |
| Caddick Construction (NW) Limited | Construction | 2017 |
| Caddick Construction Limited | Construction | 1979 |
| Cadman Housing Developments Limited | Construction | 2017 |
| Caeri-Med Ltd. | Wholesale & retail | 2005 |
| Cafe Bombay (Chinley) Ltd | Hospitality | 2022 |
| Cafe Deli Margaux Limited | Hospitality | 2021 |
| Caffe Capri Ltd | Hospitality | 2018 |
| Cajo Properties Ltd | Real estate | 2022 |
| CAL Works Limited | Wholesale & retail | 2025 |
| Calder Catering Equipment Services Limited | Administrative & support | 2006 |
| Calder Farm Services Limited | Arts & recreation | 2024 |