| Art Never Fade Limited | Arts & recreation | 2024 |
| Art of Brave Ltd | Wholesale & retail | 2025 |
| Art of Focus Limited | Professional & scientific | 2014 |
| Art of Living Media Ltd | Information & communication | 2023 |
| Art of Thai Ltd | Other services | 2024 |
| Art UK Sport Limited | Wholesale & retail | 2026 |
| Art Wood Product Ltd | Wholesale & retail | 2012 |
| ART11 Ltd | Arts & recreation | 2017 |
| Arta Property Ltd | Real estate | 2022 |
| Artaria Ltd | Wholesale & retail | 2021 |
| Artbox Ltd | Administrative & support | 2023 |
| Artbyamanah Ltd | Arts & recreation | 2025 |
| Artbyaz Limited | Arts & recreation | 2025 |
| Artclusiv CIC | Education | 2025 |
| Artco Contracts Ltd | Transport & logistics | 2008 |
| Artdotbarbers Ltd | Other services | 2019 |
| Artdotquarter Ltd | Other services | 2022 |
| Artdotsalon Ltd | Other services | 2023 |
| Artdotsauce Limited | Wholesale & retail | 2022 |
| Arte Management Ltd | Real estate | 2024 |
| Arte Stays Ltd | Real estate | 2021 |
| Artea London Limited | Professional & scientific | 2011 |
| Artebella Limited | Construction | 2025 |
| Artefact (Stirchley) Ltd | Wholesale & retail | 2017 |
| Artell UK Ltd | Financial services | 2024 |
| Arteloux Ltd | Wholesale & retail | 2025 |
| Artemis Creations UK Ltd | Wholesale & retail | 2024 |
| Artemis Property Company Limited | Real estate | 2002 |
| Artemis Resourcing Limited | Administrative & support | 2019 |
| Artemis Search Associates Limited | Professional & scientific | 1999 |
| Arteon Investor Limited | Real estate | 2024 |
| Arteon Property Holdings Ltd | Real estate | 2026 |
| Artesy Studio Ltd | Administrative & support | 2023 |
| Artfkovs Limited | Information & communication | 2024 |
| Artful Technologies Limited | Professional & scientific | 2025 |
| Artfulthreads & Pages Limited | Wholesale & retail | 2024 |
| Artha Investments Ltd | Real estate | 2019 |
| Arthmal Ltd | Health & social care | 2018 |
| Arthralgia Limited | Health & social care | 2026 |
| Arthritis Solution Ltd | Health & social care | 2014 |
| Arthur Brett Limited | Extraterritorial | 2021 |
| Arthur Builds Ltd | Construction | 2026 |
| Arthur Curtis Group Ltd | Administrative & support | 2021 |
| Arthur Housing Ltd | Hospitality | 2026 |
| Arthur Jackson Limited | Wholesale & retail | 2015 |
| Arthur Pro Limited | Transport & logistics | 2025 |
| Arthur Webb (Engineers) Limited | Real estate | 1954 |
| Arthur Webb Holdings Limited | Professional & scientific | 1979 |
| Arthur's College Limited | Education | 2024 |
| Arthur's Fold Buyers Limited | Real estate | 2018 |
| Arthurian Games Ltd | Information & communication | 2022 |
| Arti Bake Ltd | Hospitality | 2015 |
| Artica Galleries Limited | Extraterritorial | 2006 |
| Artichaulage Ltd | Water & waste | 2024 |
| Articulate Advisory Limited | Information & communication | 2015 |
| Artifex Systems Limited | Extraterritorial | 2026 |
| Artificer Technical Services Limited | Administrative & support | 2016 |
| Artificial Grass and Decking Ltd | Other services | 2023 |
| Artigiana Limited | Manufacturing | 2024 |
| Artin Convenience Store Ltd | Wholesale & retail | 2022 |
| Artis Construction Limited | Construction | 2015 |
| Artis Edge Ltd | Professional & scientific | 2026 |
| Artis Fire Solutions Limited | Financial services | 2020 |
| Artisan Bar Northern Limited | Hospitality | 2017 |
| Artisan Barfi Derby Limited | Wholesale & retail | 2021 |
| Artisan Barfi Limited | Extraterritorial | 2021 |
| Artisan Bulk Co Ltd | Wholesale & retail | 2022 |
| Artisan Consulting Limited | Professional & scientific | 2004 |
| Artisan LAB Limited | Wholesale & retail | 2019 |
| Artisan Stays Limited | Real estate | 2023 |
| Artisano Woven Decoration Ltd | Wholesale & retail | 2025 |
| Artisia Ltd | Wholesale & retail | 2024 |
| Artist Music Production Management Limited | Arts & recreation | 2008 |
| Artistry Brow Bar Limited | Other services | 2016 |
| Artistry for Decor Ltd | Construction | 2025 |
| Artisurg Limited | Health & social care | 2025 |
| Artizan Designs Limited | Arts & recreation | 2020 |
| Artizan Technologies Ltd | Information & communication | 2018 |
| Artlux Ltd | Wholesale & retail | 2019 |
| Arto Properties Limited | Real estate | 2005 |
| Artob Consulting Ltd | Professional & scientific | 2014 |
| Artobox Ltd | Wholesale & retail | 2014 |
| Artqd Painting and Decorating Ltd | Construction | 2020 |
| Artrochie Investments Limited | Professional & scientific | 2017 |
| Arts 4 ALL (England) CIC | Education | 2016 |
| Arts of Mind CIC | Education | 2024 |
| Artscoop Central | Arts & recreation | 2016 |
| Artsencrafts Community Interest Company | Manufacturing | 2023 |
| Artsmax Industrial Co. Ltd | Manufacturing | 2019 |
| Artsy Packaging Ltd | Manufacturing | 2023 |
| Artsy Party Brum Limited | Education | 2021 |
| Artsy Party Kidz CIC | Health & social care | 2021 |
| Artt Capital Limited | Real estate | 2025 |
| Artume String Quartet LLP | | 2023 |
| Artur Orzolek Ltd | Transport & logistics | 2026 |
| Arty Farty Limited | Arts & recreation | 2025 |
| Arty Transport Ltd | Construction | 2025 |
| Artycats Ltd | Arts & recreation | 2026 |
| Artz & Vybz CIC | Information & communication | 2025 |
| Arudj Limited | Hospitality | 2025 |