| A Starz Fashion Ltd | Wholesale & retail | 2024 |
| A Stubley Limited | Construction | 2004 |
| A T Hewitson Fabrication Limited | Manufacturing | 2003 |
| A Team Constructionz Limited | Construction | 2021 |
| A to B Properties Yorkshire Ltd | Real estate | 2024 |
| A to Z Care Limited | Health & social care | 2025 |
| A to ZEB Solutions Limited | Administrative & support | 2017 |
| A Traders Limited | Wholesale & retail | 2025 |
| A U Property Maintenance Ltd | Administrative & support | 2022 |
| A U R Locum Services Limited | Health & social care | 2015 |
| A V Energy Solution Limited | Other services | 2011 |
| A W Developments ( UK) Ltd | Construction | 2015 |
| A W M F Ltd | Wholesale & retail | 2014 |
| A W Water Treatment Services Limited | Water & waste | 2025 |
| A Z Property Solutions Limited | Construction | 2010 |
| A&A (Bradford) Ltd | Wholesale & retail | 2018 |
| A&A Logistics Ltd | Transport & logistics | 2026 |
| A&A Munch Box Limited | Wholesale & retail | 2024 |
| A&B Deliveries Ltd | Wholesale & retail | 2020 |
| A&D Drip Ltd | Wholesale & retail | 2022 |
| A&G Build Limited | Construction | 2017 |
| A&H Beauty Secrets Ltd | Other services | 2022 |
| A&H Corporations Ltd | Wholesale & retail | 2025 |
| A&H Locum Limited | Health & social care | 2022 |
| A&H Property Holdings Limited | Real estate | 2023 |
| A&I Access Platforms Ltd | Administrative & support | 2022 |
| A&J Investment Management Limited | Administrative & support | 2015 |
| A&J Mcevoy Limited | Financial services | 2020 |
| A&M Fourecourts Ltd | Wholesale & retail | 2026 |
| A&M Physio Limited | Public administration | 2023 |
| A&M Process Solutions Limited | Professional & scientific | 2023 |
| A&N Traders Limited | Wholesale & retail | 2020 |
| A&R 12 Ltd | Households | 2023 |
| A&S Automobile Ltd | Wholesale & retail | 2020 |
| A&S Car Centre Ltd | Wholesale & retail | 2020 |
| A&S Cityride Ltd | Transport & logistics | 2025 |
| A&S Commercial Lettings Ltd | Real estate | 2022 |
| A&S Dental Surgeons Ltd | Health & social care | 2011 |
| A&S Dhillon Store Ltd | Wholesale & retail | 2019 |
| A&S Fried Chicken Ltd | Hospitality | 2018 |
| A&S Plastic Solutions Ltd | Water & waste | 2022 |
| A&S Security Limited | Construction | 2021 |
| A&T Clinical Ltd | Health & social care | 2024 |
| A&U Networks Limited | Wholesale & retail | 2025 |
| A&Z Management Limited | Real estate | 2026 |
| A'Latosh Ltd | Wholesale & retail | 2026 |
| A-Rated Shine Ltd | Administrative & support | 2025 |
| A-Star Phones Limited | Wholesale & retail | 2020 |
| A-Z Auto Sales Limited | Wholesale & retail | 2024 |
| A-Z Car Hire Ltd | Transport & logistics | 2019 |
| A-Z Convenience Stores Ltd | Wholesale & retail | 2026 |
| A-Z House Heating Service Ltd | Construction | 2025 |
| A-Z Secure Solutions Ltd Ltd | Administrative & support | 2024 |
| A. & N. Vevers Limited | Manufacturing | 1983 |
| A. B. P. Plasterers Limited | Construction | 1997 |
| A. Crabtree (Plumbing & Heating) Limited | Construction | 2005 |
| A. J. Atkins Excavation Contractors Limited | Construction | 2003 |
| A.A Care Ltd | Health & social care | 2021 |
| A.C. Wood (Speciality Fibres) Limited | Wholesale & retail | 1977 |
| A.E Fete Ltd | Transport & logistics | 2026 |
| A.H Car Saless Ltd | Wholesale & retail | 2026 |
| A.H IT Consultant Ltd | Real estate | 2021 |
| A.H Logistics Yorkshire Ltd | Transport & logistics | 2023 |
| A.I.A Banqueting Ltd | Hospitality | 2020 |
| A.I.D Builders Ltd | Construction | 2024 |
| A.J. - Northern Blitz Ltd | Administrative & support | 2022 |
| A.K. Import Export Ltd | Wholesale & retail | 2019 |
| A.K.A. Property Investments Limited | Administrative & support | 2012 |
| A.M Commercial Cleaning Limited | Administrative & support | 2017 |
| A.M Events & Management Ltd | Hospitality | 2025 |
| A.M Furnishings Limited | Wholesale & retail | 2020 |
| A.M. Aluminium Ltd | Manufacturing | 2014 |
| A.M. and C. Wilcox Limited | Wholesale & retail | 2005 |
| A.N.N. Beauty Services Ltd | Other services | 2023 |
| A.N.Online Ltd | Wholesale & retail | 2025 |
| A.O.A Print Ltd | Manufacturing | 2021 |
| A.P.S. Plumbing Ltd | Construction | 2025 |
| A.Q. Travelling Ltd | Transport & logistics | 2023 |
| A.R. Consultants (UK) Limited | Professional & scientific | 1998 |
| A.R.C Social Ltd | Professional & scientific | 2024 |
| A.R.M (Yorkshire) Properties Ltd | Real estate | 2024 |
| A.RETAIL1 Limited | Wholesale & retail | 2024 |
| A.S. Builders (Yorkshire) Ltd | Construction | 2014 |
| A.S.C Properties U.K Ltd | Real estate | 2017 |
| A.S.J Investment Holdings Limited | Real estate | 2026 |
| A.S.P. Confidential Ltd. | Financial services | 2002 |
| A.Saeed Optics Ltd | Health & social care | 2022 |
| A.V.A Auto Body Ltd | Wholesale & retail | 2026 |
| A01 Properties Ltd | Real estate | 2025 |
| A1 Bumpers and Grilles Limited | Wholesale & retail | 2018 |
| A1 Daily Solutions Ltd | Wholesale & retail | 2025 |
| A1 Driveways and Building Ltd | Construction | 2021 |
| A1 Hirajewellers Ltd | Manufacturing | 2024 |
| A1 Meat & Poultry Ltd | Wholesale & retail | 2016 |
| A1 Mortgage Solutions Ltd | Financial services | 2022 |
| A1 Packaging UK Limited | Administrative & support | 2010 |
| A1 Physio Ltd | Health & social care | 2016 |
| A1 Poultry Wholesale BIS Ltd | Wholesale & retail | 2021 |
| A1 Poultry Wholesale Ltd | Wholesale & retail | 2010 |
| A1 Rides Ltd | Transport & logistics | 2025 |