| Brian Fell (Leven) Limited | Manufacturing | 1966 |
| Bricks N Mortar Property Maintenance Limited | Construction | 2016 |
| Brid Holidays Ltd | Real estate | 2021 |
| Brid LET Ltd | Real estate | 2016 |
| Bridal Reloved Beverley Limited | Wholesale & retail | 2016 |
| Bridbrewer and Taproom Ltd | Hospitality | 2020 |
| Bridge Child Contact Centre | Health & social care | 2010 |
| Bridlington Seasider C.I.C. | Arts & recreation | 2020 |
| Bridlington Thai Ltd | Hospitality | 2014 |
| Bright Future Holdings Ltd | Administrative & support | 2017 |
| Brightedgesolar Ltd | Construction | 2023 |
| Brinkman (Horticultural Service) U.K. Limited | Wholesale & retail | 1974 |
| Bristol Carriage Masters Limited | Other services | 2004 |
| Brit Auto Services Limited | Wholesale & retail | 2012 |
| Britchem Limited | Manufacturing | 2002 |
| Britvolt Ltd | Administrative & support | 2018 |
| Broad Mere Ltd | Information & communication | 2025 |
| Broadacres Consultancy Ltd | Professional & scientific | 2024 |
| Broadgate Safety Consultants Limited | Professional & scientific | 2014 |
| Broadgate Traders Limited | Real estate | 2007 |
| Broadtrench Limited | Agriculture & fishing | 1986 |
| Broken Bones Limited | Professional & scientific | 2012 |
| Broken Fence Games Limited | Information & communication | 2014 |
| Brother Nature Nutrition Ltd | Wholesale & retail | 2014 |
| Brown Accomodation Ltd | Real estate | 2011 |
| Browns (Kelk) Ltd | Professional & scientific | 2015 |
| BRR Electrical Ltd | Manufacturing | 2025 |
| Bryan Horberry Commercial Property Limited | Construction | 2017 |
| Bsaea Limited | Public administration | 2019 |
| BSC Enterprises Limited | Real estate | 2004 |
| BTB Services Ltd | Professional & scientific | 2022 |
| BTM Holdings Ltd | Real estate | 2019 |
| Buckley Consultants Ltd | Health & social care | 2017 |
| Budget Inn Ltd | Hospitality | 2023 |
| Budget Steel Fabrications Limited | Manufacturing | 2002 |
| BUG Vinyl Records Limited | Wholesale & retail | 2017 |
| Bump Brush Ltd | Other services | 2011 |
| Burgerly Limited | Hospitality | 2020 |
| Burke Transport Limited | Transport & logistics | 2021 |
| Burngate Property Services Ltd | Real estate | 2024 |
| Burton House Builders Ltd | Construction | 2017 |
| Buttercup Trading Limited | Hospitality | 2002 |
| BY Tracy Fletcher Limited | Professional & scientific | 2015 |
| Byrd Homes Ltd | Real estate | 2017 |
| Byway Craft Co Ltd | Manufacturing | 2025 |
| C & J Consulting Limited | Professional & scientific | 2025 |
| C B Land Management Limited | Households | 2006 |
| C H K G Holdings Limited | Professional & scientific | 2011 |
| C Horse Limited | Hospitality | 1999 |
| C J Display Limited | Construction | 2013 |
| C&S Property Services ( East Yorkshire) Ltd | Construction | 2026 |
| C.A.N. Hire Ltd | Administrative & support | 2017 |
| C.H Buildings Limited | Real estate | 2025 |
| C.N.Joinery Limited | Construction | 2003 |
| C2C Property Investments Ltd | Construction | 2025 |
| Ca's Garage Ltd | Wholesale & retail | 2022 |
| Cabung Limited | Manufacturing | 2016 |
| Cacti Design Limited | Administrative & support | 2003 |
| Cafe House Limited | Hospitality | 2024 |
| Cafe Leon 2018 Ltd | Hospitality | 2018 |
| Calm Garms Ltd | Wholesale & retail | 2025 |
| Calvard Financial Limited | Professional & scientific | 2015 |
| Cameron Construction (York) Ltd. | Construction | 2015 |
| Camions Management Company Limited | Real estate | 2005 |
| Cammack Homes Ltd | Construction | 2022 |
| Cammack Properties North Limited | Real estate | 2025 |
| Candlemas Consulting Limited | Professional & scientific | 2026 |
| Candoo Partners Limited | Professional & scientific | 2022 |
| Cans (2009) Limited | Other services | 2009 |
| Capax Health & Safety Limited | Professional & scientific | 2019 |
| Cape and Crown Limited | Real estate | 2024 |
| Cape Contractors Ltd | Construction | 2026 |
| Cape Property Ltd | Real estate | 2019 |
| Capratechnology Limited | Professional & scientific | 2000 |
| Capture Consultants Ltd | Financial services | 2025 |
| Car Body and Paint Centre Limited | Wholesale & retail | 2003 |
| Carabuild Park & Leisure Homes Ltd | Manufacturing | 2012 |
| Caravan Hire Online Ltd | Administrative & support | 2012 |
| Caravan Services Online Limited | Wholesale & retail | 2019 |
| Care Candidate Limited | Extraterritorial | 2024 |
| Care in Home Ltd | Health & social care | 2022 |
| Carefree Caravan Hire Limited | Administrative & support | 2017 |
| Caresmith Limited | Health & social care | 2022 |
| Cariad Features Limited | Information & communication | 2022 |
| Cariad House Limited | Information & communication | 2025 |
| Cariad Lifestyle Limited | Professional & scientific | 2019 |
| Carl Hammond Limited | Wholesale & retail | 2014 |
| Carlile Education Limited | Education | 2006 |
| Carlton Mini Market Limited | Wholesale & retail | 2016 |
| Carnaby Powder Coatings Limited | Manufacturing | 2002 |
| Carol Bird Interiors Limited | Professional & scientific | 2016 |
| Carr Hill Farm Ltd | Agriculture & fishing | 2014 |
| Carr Project Engineering Ltd | Construction | 2022 |
| Carter & Burton Ltd | Households | 2023 |
| Carter Burnett Ltd | Professional & scientific | 2018 |
| Carter Equestrian Limited | Arts & recreation | 2019 |
| Casadea Ltd | Administrative & support | 2024 |
| Cast Connect Ltd | Administrative & support | 2024 |
| Castello Pizzeria Ltd | Hospitality | 2026 |
| Castium Limited | Administrative & support | 2011 |