| Arthington Futures Limited | Financial services | 2025 |
| Arthington Hall Estates Limited | Real estate | 2025 |
| Arthington Hall Properties Limited | Real estate | 2025 |
| Arthington Light Haulage Ltd | Transport & logistics | 2026 |
| Arthington Ventures Limited | Financial services | 2025 |
| Arts People Ltd | Education | 2018 |
| Arundel Travel Limited | Other services | 2017 |
| AS Electrical (Otley) Limited | Construction | 2013 |
| AS Electrical Supplies (Otley) Ltd | Wholesale & retail | 2023 |
| Ashfield Park (Grounds) Management Company Limited | Households | 2011 |
| Askwith Limited | Real estate | 1999 |
| Aspire Supply Chain Solutions Limited | Professional & scientific | 2015 |
| Aston Charles Limited | Administrative & support | 2007 |
| Atherton Hall Properties Ltd | Construction | 2019 |
| ATK Developments (Yorkshire) Limited | Construction | 2019 |
| ATM Groundworks & Civils Limited | Construction | 2018 |
| Aura of Otley Limited | Wholesale & retail | 2025 |
| Auto Autonomy Ltd | Wholesale & retail | 2016 |
| Autonomy Press Ltd | Information & communication | 2023 |
| Avon Chemical Regulatory Enterprises Consultancy Ltd | Information & communication | 2020 |
| Avondale BS Ltd | Professional & scientific | 2024 |
| Avondale Medical Limited | Administrative & support | 2011 |
| AW Medical Training Ltd | Education | 2026 |
| B Delaney I R Limited | Arts & recreation | 2013 |
| B Houldsworth and Sons Limited | Construction | 2001 |
| B L Mitchell Ltd | Administrative & support | 2015 |
| B&S Sports Consultancy Limited | Real estate | 2013 |
| B&W Studio Limited | Professional & scientific | 2004 |
| B.B.S. (Brick and Stone) Limited | Wholesale & retail | 1990 |
| Baker & Wyld Anaesthetic Services Limited | Health & social care | 2014 |
| Bamboo Tamboo Ltd | Arts & recreation | 2011 |
| Baobab Hospitality Ltd | Hospitality | 2025 |
| Barbara Nixon Limited | Professional & scientific | 2021 |
| Barber & Bennett Limited | Wholesale & retail | 2020 |
| Bargainry Limited | Extraterritorial | 2024 |
| Barrowby Estate Management Limited | Households | 2001 |
| Baruch Hashem Ltd | Construction | 2023 |
| Bassquinn Express Distribution Ltd | Transport & logistics | 2019 |
| BBS Brick & Stone Group Ltd | Financial services | 2025 |
| BBS Natural Stone Specialists Limited | Wholesale & retail | 2021 |
| Beachside Estates Limited | Real estate | 2012 |
| Bean Vaping Limited | Wholesale & retail | 2021 |
| Beat Street Music Limited | Extraterritorial | 2013 |
| Beauty in Harrogate Ltd | Other services | 2025 |
| Beech Hill Garage Limited | Wholesale & retail | 2009 |
| Beesport Limited | Extraterritorial | 2016 |
| Bell Solutions Limited | Information & communication | 2019 |
| Belvedere Commercial Law Limited | Professional & scientific | 2016 |
| Bentley Aerospace Ltd | Professional & scientific | 2020 |
| Best Kebab Otley Limited | Hospitality | 2024 |
| BFE Brays Limited | Professional & scientific | 2006 |
| BG Foodtechs Ltd | Professional & scientific | 2016 |
| Big Change Consulting Limited | Information & communication | 2022 |
| Big Fred Sound Services Ltd | Information & communication | 2025 |
| Bike Futures Ltd | Education | 2022 |
| Bioenergy Consultancy Limited | Professional & scientific | 2022 |
| Biomechanical Logic Limited | Wholesale & retail | 2007 |
| Biomechanists Limited | Professional & scientific | 2016 |
| Biota Trace Limited | Information & communication | 2024 |
| Biota Trace Systems Limited | Information & communication | 2025 |
| Bird Resilience Limited | Education | 2020 |
| Bishopwood Ltd | Professional & scientific | 2019 |
| Bixley Plastering Ltd | Construction | 2007 |
| Black LAB Digital Marketing Ltd | Professional & scientific | 2017 |
| BLD Property Solutions Yorkshire Ltd | Construction | 2020 |
| Bloody Altar Ltd | Wholesale & retail | 2020 |
| Bloomfield Square Otley Limited | Hospitality | 2019 |
| Blue Barn Holdings Limited | Financial services | 2020 |
| Blue Box Properties Limited | Real estate | 2003 |
| Blue Magic Construction Ltd | Construction | 2026 |
| Blue Sky Designs Group Limited | Professional & scientific | 2005 |
| Blue Sky Designs Limited | Professional & scientific | 2002 |
| Blue Sky Studios (UK) Limited | Professional & scientific | 2004 |
| Blueside Eccleshill Solutions Limited | Wholesale & retail | 2025 |
| BM Plastering & Rendering Ltd | Construction | 2023 |
| BMP Electrical Ltd | Other services | 2015 |
| Bodega Movil Limited | Wholesale & retail | 2020 |
| Bookish DUO Limited | Information & communication | 2024 |
| Books and Booze Limited | Wholesale & retail | 2024 |
| Boring Food Ltd | Wholesale & retail | 2025 |
| Boroughgate Holdings Limited | Real estate | 2016 |
| Bowman Home Solutions Ltd | Construction | 2021 |
| Boxclever Consultants Limited | Professional & scientific | 2012 |
| BR & AR Services Limited | Construction | 2025 |
| BR Associates Ltd | Professional & scientific | 2024 |
| Brackenridge Properties Ltd | Real estate | 2014 |
| Briars Financial Planning Ltd | Financial services | 2013 |
| Brick House Roofing & Building Ltd | Construction | 2006 |
| Bright Ideas Childcare (Otley) Ltd | Education | 2026 |
| Bright Ideas Childcare (Yeadon) Ltd | Education | 2023 |
| Bronte Developments Limited | Real estate | 2020 |
| Bronte Suit Case Company Ltd | Wholesale & retail | 2012 |
| Brookroyd Consulting Limited | Real estate | 2025 |
| Brooks Kitchens and Joinery Services Ltd | Construction | 2025 |
| Browse Wood Designs Limited | Manufacturing | 2013 |
| BSJ Enterprises Limited | Information & communication | 2006 |
| Buer Holdings Limited | Real estate | 2021 |
| Building a Healthy Hillingdon Limited | Construction | 2024 |
| Bunyan Properties Ltd | Real estate | 2022 |
| Buon Apps Ltd. | Hospitality | 2009 |