| Armitage Bridge Cricket Club (Community) Ltd | Arts & recreation | 2024 |
| Armitage Consultancy Services Ltd | Construction | 2019 |
| Armitage Developments UK Limited | Construction | 2001 |
| Armitage Hague Estates Ltd | Real estate | 2020 |
| Armour Fire Protection Limited | Other services | 2025 |
| Armstrong Investments Limited | Real estate | 2003 |
| Armstrong Products Limited | Manufacturing | 2009 |
| Arncliffe Court (Huddersfield) Maintenance Limited | Households | 1974 |
| Arnies Burgers & Shakes Ltd | Hospitality | 2020 |
| ARO Market Ltd | Wholesale & retail | 2019 |
| Aroma Restaurant & Grill Ltd | Hospitality | 2019 |
| Arooj Store Ltd | Wholesale & retail | 2024 |
| Aroosa Beauty (UK) Ltd | Other services | 2009 |
| Aroosh Limited | Transport & logistics | 2024 |
| Arosmix Limited | Wholesale & retail | 2022 |
| Around the Table With Lawrence Ltd | Hospitality | 2026 |
| Arowana Technologies Limited | Information & communication | 2014 |
| Arra Trading Limited | Wholesale & retail | 2025 |
| Arreviews Ltd | Information & communication | 2026 |
| Arrow Commercial Centre (Huddersfield) Limited | Wholesale & retail | 1987 |
| Arrow Commercial Holdings Limited | Financial services | 2018 |
| Arrow Industrial Group Limited | Construction | 2002 |
| Arrow Industrial Holdings Limited | Professional & scientific | 2007 |
| Arrow Industrial Limited | Extraterritorial | 1981 |
| Arrows Legal Ltd | Other services | 2023 |
| Arsam,S Couture Ltd | Wholesale & retail | 2026 |
| Arshad & Sons GRP Limited | Hospitality | 2024 |
| Arshed Properties Ltd | Real estate | 2025 |
| Art at the House CIC | Arts & recreation | 2022 |
| Art Music Experimental CIC | Information & communication | 2019 |
| Artech Enterprise Ltd | Other services | 2024 |
| Artemis Fabrics Limited | Other services | 2017 |
| Artero UK Ltd | Other services | 2019 |
| Artful Splodgers (West Yorkshire) Ltd | Arts & recreation | 2019 |
| Arthur Lockwood & SON Limited | Construction | 1993 |
| Arthur Rose Property Ltd | Professional & scientific | 2015 |
| Articulum Ltd | Manufacturing | 2024 |
| Artisan Hair (Shepley) Limited | Other services | 2023 |
| Artisan Skin Clinic Ltd | Other services | 2023 |
| Artish Huddersfield CIC | Arts & recreation | 2023 |
| Artist Colony Limited | Information & communication | 2019 |
| Artistic Expression Limited | Administrative & support | 2001 |
| Artnova Capital PLC | Arts & recreation | 2020 |
| Artwaseem Ltd | Arts & recreation | 2021 |
| Artwood Interiors Ltd | Professional & scientific | 2009 |
| Arty Explorers Ltd | Education | 2021 |
| Arvilo Ltd | Wholesale & retail | 2025 |
| Arvin Tradelink Ltd | Wholesale & retail | 2018 |
| Arvonix Limited | Wholesale & retail | 2025 |
| ARX Ltd | Administrative & support | 2008 |
| Aryia Limited | Wholesale & retail | 2026 |
| Aryoz Shop Ltd | Wholesale & retail | 2020 |
| AS Apparel Impex Limited | Wholesale & retail | 2022 |
| AS Apparel UK Ltd | Wholesale & retail | 2025 |
| AS Design House Ltd | Professional & scientific | 2024 |
| AS Developments Ltd | Real estate | 2024 |
| AS Fairmont Holdings Limited | Financial services | 2026 |
| AS Fairmont Property Limited | Real estate | 2026 |
| AS HR Solutions Ltd | Administrative & support | 2025 |
| AS Pharmaceutical Ltd | Wholesale & retail | 2023 |
| AS Restore Ltd | Construction | 2026 |
| AS Stars Tuition Ltd | Education | 2025 |
| AS Technical Consultancy Ltd | Construction | 2024 |
| As&H (Coform) 129 Limited | Transport & logistics | 1958 |
| ASA Hudds Ltd | Health & social care | 2021 |
| ASA Private Limited | Health & social care | 2017 |
| Asad UK Properties Ltd | Real estate | 2025 |
| Asad's Optical Ltd | Public administration | 2025 |
| Asaf ALI Ltd | Households | 2026 |
| Asap Analgesia Ltd | Extraterritorial | 2024 |
| Ascent Climbing Coaching Ltd | Arts & recreation | 2025 |
| Ascot House Investments Limited | Real estate | 2022 |
| ASD & Adhd Focus Ltd | Health & social care | 2025 |
| ASD Mortgage and Protection Ltd | Financial services | 2025 |
| Asfa Brothers and Limited | Wholesale & retail | 2023 |
| ASH Airport Taxi Service Ltd | Transport & logistics | 2024 |
| ASH Brittain Ltd | Wholesale & retail | 2023 |
| ASH Design Ltd | Professional & scientific | 2023 |
| ASH Grove Automotive Ltd | Wholesale & retail | 2021 |
| ASH Health Ltd | Health & social care | 2023 |
| ASH Pharm (Yorkshire) Ltd | Health & social care | 2024 |
| ASH Trading Ltd | Wholesale & retail | 2022 |
| ASH Well Grove Management Company Ltd | Households | 2023 |
| Ashbrook Properties (2018) Limited | Real estate | 2018 |
| Asheibi Ltd | Health & social care | 2026 |
| Ashfield Colours Ltd | Construction | 2024 |
| Ashfield Hotel Ltd | Other services | 2015 |
| Ashfield Property Rentals Ltd | Real estate | 2024 |
| Ashford Manor Estates Limited | Real estate | 1999 |
| Ashgrove Services Ltd | Professional & scientific | 2022 |
| Ashimala Ltd | Real estate | 2023 |
| Ashley Campbell Music Ltd | Arts & recreation | 2026 |
| Ashley Herbert Limited | Other services | 2014 |
| Ashley Interiors (Denby Dale) Ltd | Manufacturing | 2022 |
| Ashley Jackson Gallery Limited | Wholesale & retail | 1969 |
| Ashmede Holdings Ltd | Extraterritorial | 2007 |
| Ashraf & Sons Travels Ltd | Transport & logistics | 2025 |
| Ashraf-Khan Finance Limited | Financial services | 2017 |
| Ashwell Property Holdings Limited | Real estate | 2026 |
| Ashworth Online Ltd | Wholesale & retail | 2022 |