| Allied Hands Ltd | Administrative & support | 2018 |
| Alta VUE Limited | Professional & scientific | 2017 |
| Alternative Finance Group Ltd | Financial services | 2019 |
| AM Environmental Services Northern Limited | Administrative & support | 2016 |
| AM Scaffolding (West Yorkshire) Ltd | Construction | 2026 |
| AM Vehicle Services Ltd | Transport & logistics | 2026 |
| Amba Management Group Limited | Real estate | 2026 |
| Amber JH Nails Ltd | Other services | 2023 |
| Ambiance Construction Limited | Construction | 2024 |
| Ambiance Stoves Ltd | Wholesale & retail | 2024 |
| AME Accounting & Co. Ltd | Professional & scientific | 2021 |
| Amplus Electrical Ltd | Construction | 2025 |
| Amypen Limited | Professional & scientific | 2012 |
| Anada Properties Limited | Real estate | 2022 |
| Anandaqua Clean Ltd | Administrative & support | 2026 |
| Andrew Mclean Properties Ltd | Real estate | 2025 |
| Angelito Desserts Limited | Hospitality | 2026 |
| Angels Solutions Ltd | Professional & scientific | 2011 |
| Anglo Carbon & Contacts Limited | Manufacturing | 1960 |
| Anglo Carbon (Auto) Limited | Extraterritorial | 1967 |
| Anglo Carbon (Industrial) Limited | Extraterritorial | 1967 |
| Anglo Carbon Group Limited | Financial services | 2019 |
| Angus Mcdonald Photography Limited | Professional & scientific | 2011 |
| Annie Knell Limited | Education | 2026 |
| Anomaly Productions Ltd | Information & communication | 2022 |
| Anoopt Ltd | Real estate | 2020 |
| Apex Performance Labs Ltd | Wholesale & retail | 2025 |
| Apex Yorkshire Ltd | Construction | 2022 |
| Apperley Dogs and Cats Limited | Other services | 2018 |
| Appsgenii UK Ltd | Information & communication | 2021 |
| APW Collective Group Ltd | Arts & recreation | 2026 |
| AR Punjabi Cafe Ltd | Hospitality | 2024 |
| Arabesque Artistry Ltd | Arts & recreation | 2016 |
| ARC Ventilation Services Ltd | Construction | 2026 |
| Arch Bar 28 Ltd | Hospitality | 2026 |
| Archer Elite Ltd | Wholesale & retail | 2025 |
| Arista Homes Ltd | Construction | 2020 |
| Arora Construction Limited | Construction | 2013 |
| Art by Arjo Limited | Wholesale & retail | 2018 |
| Aryo Barber Ltd | Other services | 2022 |
| Asap Temp Recruitment Limited | Administrative & support | 2015 |
| ASH Shifa Limited | Wholesale & retail | 2007 |
| ASH Shifa Properties Limited | Administrative & support | 2015 |
| Ashville Academy Limited | Arts & recreation | 2021 |
| Askot Ltd | Hospitality | 2020 |
| Aspire Milestones Limited | Hospitality | 2023 |
| Athelas CIC | Other services | 2016 |
| Attitude Dance Leeds Ltd | Education | 2026 |
| Audio Addicts Ltd | Wholesale & retail | 2024 |
| Audioserv Limited | Manufacturing | 2004 |
| Aurora Environmental Consulting Limited | Professional & scientific | 2024 |
| Aurora Environmental Holdings Limited | Financial services | 2025 |
| Authentic Crafts Limited | Transport & logistics | 2020 |
| AV8 Logistics Limited | Transport & logistics | 2006 |
| Aventyr Calling Ltd | Wholesale & retail | 2022 |
| Avenues Healthcare Ltd | Health & social care | 2020 |
| Avrm Ltd | Financial services | 2020 |
| AW Health & Safety Ltd | Health & social care | 2018 |
| AX Estates Limited | Real estate | 2023 |
| Axis Bidco Limited | Financial services | 2015 |
| Axis Care Consultants Ltd | Professional & scientific | 2026 |
| Axis Midco Limited | Financial services | 2015 |
| Axis Topco Limited | Extraterritorial | 2015 |
| Ayden and Maya Ltd | Real estate | 2026 |
| Aydin Traders Ltd | Wholesale & retail | 2026 |
| Ayoob Limited | Health & social care | 2011 |
| AZ Tutoring Group Ltd | Education | 2025 |
| Azonic Digital Limited | Information & communication | 2015 |
| B Harton Installations Limited | Construction | 2022 |
| B K Westerby Consultancy Ltd | Professional & scientific | 2018 |
| B Medina Cafe Ltd | Hospitality | 2024 |
| B Medina SM Ltd | Hospitality | 2025 |
| B Tomlinson & SON Limited | Agriculture & fishing | 2014 |
| B Williams Associates Ltd | Administrative & support | 2018 |
| BA Solutions Limited | Professional & scientific | 2021 |
| Baccu Sales and Marketing Ltd | Professional & scientific | 2020 |
| Back in Action Physiotherapy Limited | Health & social care | 2001 |
| Backscratch Limited | Information & communication | 2021 |
| Badminton World Ltd | Wholesale & retail | 2022 |
| Baker Harding Recruitment Limited | Administrative & support | 2001 |
| Balavon Studios Ltd | Information & communication | 2025 |
| BAM BAM & Friends Fluffy Holidays Limited | Other services | 2020 |
| Barhouse Joiners & Builders Limited | Construction | 1984 |
| Barkers Living Limited | Hospitality | 2025 |
| Barkers Mills Limited | Real estate | 2015 |
| Barkers Properties Ltd | Real estate | 2018 |
| Barna Design Ltd | Professional & scientific | 2025 |
| Barr and Grill Ltd | Hospitality | 2022 |
| Barr Utilities Leeds Ltd | Administrative & support | 2026 |
| Barr Utilities Limited | Administrative & support | 2022 |
| Baskerville Reactors & Autoclaves Limited | Manufacturing | 2015 |
| Basra Consultancy Ltd | Professional & scientific | 2022 |
| Basra Properties Ltd | Real estate | 2020 |
| BB School SUB Ltd | Real estate | 2024 |
| BDS Group North Ltd | Financial services | 2025 |
| BE Smart International Ltd | Wholesale & retail | 2015 |
| Bean & Gone Espresso Bar Ltd | Hospitality | 2020 |
| Bearded Panda Ltd | Real estate | 2025 |
| Bears Pantry (Yorkshire) Ltd | Hospitality | 2014 |
| Beauty and the Bleach (Leeds) Limited | Administrative & support | 2023 |