| Abasser Ltd | Health & social care | 2022 |
| Abbas Travels Ltd | Transport & logistics | 2026 |
| Abbey Tapas Limited | Hospitality | 2019 |
| ABC Properties Yorkshire Limited | Real estate | 2024 |
| Abdullah House Ltd | Real estate | 2025 |
| Abhi Rose Homecare Ltd | Health & social care | 2016 |
| Abhi Rose Ltd | Other services | 2015 |
| Ablp Hestia Limited | Wholesale & retail | 1981 |
| Ablp Limited | Financial services | 2024 |
| ABM Softplay Limited | Manufacturing | 2017 |
| Abna Living Ltd | Wholesale & retail | 2021 |
| Absolute Property Security Ltd | Administrative & support | 2022 |
| Absolute Van Locks Ltd | Manufacturing | 2024 |
| Abta Properties Ltd | Real estate | 2025 |
| Abundant Abodes Ltd | Real estate | 2023 |
| ABZ Courier Services Ltd | Transport & logistics | 2025 |
| AC Beds Ltd | Wholesale & retail | 2024 |
| Accommadare Ltd | Construction | 2022 |
| Ace Star Parts Ltd | Wholesale & retail | 2023 |
| Acee Eventss Ltd | Hospitality | 2023 |
| Acee Property Ltd | Real estate | 2026 |
| Achp Holdings Limited | Health & social care | 2024 |
| Aciem Group Limited | Construction | 1997 |
| ACP Programs Ltd | Extraterritorial | 2024 |
| Active Cars Ltd | Administrative & support | 2007 |
| AD6 Properties Ltd | Real estate | 2022 |
| Adam and AA Limited | Transport & logistics | 2025 |
| Adam Fitness Limited | Arts & recreation | 2023 |
| Adam's Car Wash Ltd | Administrative & support | 2022 |
| Adams Accountancy UK Ltd | Professional & scientific | 2009 |
| Adams Estates (Dews) Ltd | Real estate | 2012 |
| Adams Heating Installations Ltd | Construction | 2023 |
| Adams Heating Ltd | Construction | 2020 |
| Adams Opticians Ltd | Health & social care | 2008 |
| Adeels Pharma Limited | Health & social care | 2023 |
| Adjust-A-Bed Ltd | Manufacturing | 2019 |
| Adnaan Iqbal Mohamed Consulting Limited | Information & communication | 1998 |
| Adnan & Rehaman Limited | Transport & logistics | 2025 |
| Adore Sleep Ltd | Manufacturing | 2022 |
| ADS North East Ltd | Real estate | 2020 |
| Adsvance Media Limited | Information & communication | 2025 |
| Adtaximedia Ltd | Information & communication | 2017 |
| Advance Health Practice Ltd | Health & social care | 2022 |
| Advanced Consulting UK Limited | Other services | 2015 |
| ADW Technologies Limited | Professional & scientific | 2019 |
| ADY Consulting Ltd | Professional & scientific | 2022 |
| Aemas Limited | Manufacturing | 2010 |
| Aeonic Sphere Limited | Health & social care | 2023 |
| AF Enterprises Ltd | Wholesale & retail | 2019 |
| AF Investments Dewsbury Ltd | Real estate | 2020 |
| Affordable Quality Limited | Wholesale & retail | 2025 |
| Afridi Property Ltd | Real estate | 2023 |
| AFT Retail Ltd | Wholesale & retail | 2024 |
| Afters Dewsbury Ltd | Wholesale & retail | 2020 |
| Afterstock by AS Ltd | Wholesale & retail | 2025 |
| AH Automotive Limited | Wholesale & retail | 2026 |
| AH Craft Ltd | Manufacturing | 2025 |
| AH Travel YS Ltd | Transport & logistics | 2024 |
| Ahmad Healthcare Limited | Health & social care | 2017 |
| Ahmad&Son’Suk Ltd | Wholesale & retail | 2026 |
| Ahmadkhan Properties Limited | Real estate | 2025 |
| Ahmed Medical Services Ltd | Health & social care | 2026 |
| Ahmed Taekwondo Academy Ltd | Arts & recreation | 2020 |
| AHN Enterprise Ltd | Health & social care | 2019 |
| AHN Healthcare Ltd | Health & social care | 2018 |
| AHN Property Ltd | Real estate | 2020 |
| Ahuru INT Ltd | Wholesale & retail | 2025 |
| AI Autos & Sales Ltd | Wholesale & retail | 2025 |
| Ailytics Ltd | Professional & scientific | 2026 |
| AIM Enterprise Group Limited | Wholesale & retail | 2024 |
| Aiman's Events Ltd | Hospitality | 2026 |
| AIN Consultants Ltd | Information & communication | 2023 |
| Airah Bespoke Interiors Ltd | Manufacturing | 2025 |
| Airvexion Ltd | Manufacturing | 2026 |
| Aizaah Ltd | Real estate | 2026 |
| AJ Focus Limited | Professional & scientific | 2022 |
| AJ Food Enterprise Limited | Hospitality | 2022 |
| AJ Motors (Dewsbury) Ltd | Wholesale & retail | 2017 |
| Aj&S Group Limited | Transport & logistics | 2019 |
| AJA Holdings 2019 Limited | Financial services | 2019 |
| AJK Associates Limited | Professional & scientific | 2020 |
| Ajmal Properties Limited | Construction | 2011 |
| AK Beds (Yorkshire) Ltd | Manufacturing | 2024 |
| AK Beds Limited | Manufacturing | 2017 |
| AK Foodservice (Yorkshire) Ltd | Hospitality | 2025 |
| AK Holding Limited | Professional & scientific | 2014 |
| AK Mobiles Yorkshire Limited | Wholesale & retail | 2018 |
| Akaris Holdings Limited | Financial services | 2025 |
| Akash Batley Ltd | Hospitality | 2024 |
| Akhtar Family Holdings LLP | | 2023 |
| Akhtar Pharm Limited | Health & social care | 2024 |
| Akhtars Properties Ltd | Real estate | 2017 |
| Akira Ventures Ltd | Real estate | 2023 |
| Akmz Logistics Ltd | Transport & logistics | 2022 |
| Aksar Mohammed Consulting Services Ltd | Administrative & support | 2016 |
| Akshop Ltd | Wholesale & retail | 2021 |
| AKU Real Estate Limited | Real estate | 2025 |
| Akudi Enterprises Ltd | Health & social care | 2006 |
| AL Company Trading Ltd | Wholesale & retail | 2023 |
| AL Gernal Trade and Car Services Ltd | Wholesale & retail | 2018 |