| Barbara Smith (Properties) Limited | Real estate | 2003 |
| Barber Court (Birmingham) Management Company Limited | Real estate | 2018 |
| Barbican Court Flats Management Company Limited | Households | 1999 |
| Barbican Holdings Limited | Extraterritorial | 2004 |
| Barclay Mcpherson Limited | Professional & scientific | 2012 |
| Bare Earth Projects Ltd | Professional & scientific | 2017 |
| Bareaesthetics by Courtenay Ltd | Other services | 2025 |
| Barefoot Lightning Limited | Information & communication | 2013 |
| Barfoss Place Management Company | Households | 2023 |
| Barker Developments York Limited | Households | 2018 |
| Barker Joinery & Construction Limited | Construction | 2010 |
| Barker Joinery LLP | | 2013 |
| Barkerbrown York Ltd | Construction | 2018 |
| Barkerend Estate Company Limited | Real estate | 1982 |
| Barkers Development Limited | Construction | 2016 |
| Barkers Garage Limited | Wholesale & retail | 2007 |
| Barkers Investment Properties Ltd | Real estate | 2021 |
| Barkersson Consulting Ltd | Professional & scientific | 2015 |
| Barking MAD Creations Limited | Extraterritorial | 2008 |
| Barlby Cleaning Services Limited | Administrative & support | 2025 |
| Barley Motor Company Limited | Wholesale & retail | 2023 |
| Barley Studios Limited | Construction | 2000 |
| Barleydale Limited | Real estate | 2025 |
| Barmby Grange Investment Co. Limited | Real estate | 1965 |
| Barmbyfield Barns Limited | Real estate | 2013 |
| Barnabas Care Limited | Health & social care | 2022 |
| Barnby Leisure Ltd | Hospitality | 2023 |
| Barnes Associates Ltd | Agriculture & fishing | 2016 |
| Barnett Developments Concrete Ltd | Manufacturing | 2026 |
| Barnett Developments Ltd | Real estate | 2024 |
| Barnington Harper Limited | Extraterritorial | 2021 |
| Barnside Developments Ltd | Construction | 2023 |
| Baron Truck Tyres Limited | Extraterritorial | 2009 |
| Barratt Electrical Services (York) Ltd | Construction | 2025 |
| Barrett Developments & Lettings Limited | Extraterritorial | 2014 |
| Barrigan Bell Limited | Professional & scientific | 2013 |
| Barrington Whyte Limited | Administrative & support | 2008 |
| Barron's Mechanical & Electrical Consultancy Ltd | Construction | 2011 |
| Barrson Properties Limited | Real estate | 2018 |
| Barstow Electrical Limited | Construction | 2018 |
| Bart Harrison Promotions Limited | Professional & scientific | 2023 |
| Bartizan House Ltd | Wholesale & retail | 2020 |
| Bartlett Inns Ltd | Hospitality | 2023 |
| Bartlett Mettham Ltd | Professional & scientific | 2025 |
| Barton Brooke & Co Ltd | Professional & scientific | 2020 |
| Barton Howe Associates Limited | Administrative & support | 2012 |
| Barton Villa York Ltd | Hospitality | 2016 |
| Bartpol (Yorkshire) Limited | Construction | 2019 |
| Barwies Limited | Real estate | 2025 |
| BAS Corporation Ltd | Agriculture & fishing | 2007 |
| Basanbec Ltd | Wholesale & retail | 2024 |
| Base 4 Plumbing & Heating Ltd | Extraterritorial | 2013 |
| Base Accountants Ltd | Professional & scientific | 2022 |
| Baskerville Properties & Investments Ltd | Real estate | 2024 |
| Baslow Cottages Ltd | Real estate | 2024 |
| Baston Lane Huby Management Company Limited | Households | 2024 |
| Bastow & Co Limited | Financial services | 2003 |
| Batanga Ltd | Hospitality | 2023 |
| Bates Imaging Limited | Health & social care | 2019 |
| Batey Works Limited | Wholesale & retail | 2025 |
| Bathology Ltd | Wholesale & retail | 2024 |
| Bathroom Design Ltd | Wholesale & retail | 2013 |
| Batrudding Shoot Ltd | Arts & recreation | 2024 |
| Battalion Martial Arts Ltd | Arts & recreation | 2024 |
| Battery Solutions York Ltd | Other services | 2007 |
| Battery Solutions Yorkshire Ltd | Other services | 2023 |
| Battle Line Armouries Limited | Wholesale & retail | 2025 |
| Battlesey Limited | Administrative & support | 2022 |
| Batwing Apothecary Ltd | Wholesale & retail | 2024 |
| Bavidge Cafe’S Limited | Hospitality | 2023 |
| Bawtry Lettings and Sales Limited | Real estate | 2010 |
| Baxby Awakening Limited | Other services | 2025 |
| Baxby Microlights Limited | Manufacturing | 1990 |
| Bay Cottage Industries Limited | Other services | 2005 |
| Bay Horse Enterprises Limited | Real estate | 2020 |
| Bay Horse House Ltd | Hospitality | 2025 |
| Bay Logic Limited | Transport & logistics | 2023 |
| Bayley Croft Management Company Limited | Real estate | 2019 |
| Baylis and Baylis Limited | Professional & scientific | 2020 |
| Bayshire Relocations Limited | Hospitality | 2021 |
| Bayshore Colt Limited | Extraterritorial | 2026 |
| Baytown Cleaning & Management Limited | Administrative & support | 2017 |
| Baytown Holiday Cottages Limited | Real estate | 2017 |
| BB Property (York) LLP | | 2023 |
| BB64 Ltd | Real estate | 2025 |
| Bbdy Ltd | Transport & logistics | 2025 |
| BBM Media Ltd. | Professional & scientific | 2021 |
| BBS Accounts & Bookkeeping Services Ltd | Professional & scientific | 2017 |
| BC Elite Builders Limited | Construction | 2024 |
| Bcast Media Limited | Information & communication | 2026 |
| Bchll Ltd | Information & communication | 2023 |
| BCM Project Management and Building Limited | Construction | 2021 |
| BCQ Engineering Limited | Professional & scientific | 2026 |
| BCS (York) Limited | Construction | 2015 |
| BCS Property Investment Ltd. | Real estate | 2024 |
| BCT Accountants Ltd | Professional & scientific | 2011 |
| BCT Investments Ltd | Professional & scientific | 2020 |
| BDA 1 Ltd | Construction | 2018 |
| BDA Properties (York) Ltd | Real estate | 2026 |
| BDH Race SIM Hardware Ltd | Manufacturing | 2022 |