| Atlas Hotels (Salford Quays) Limited | Leicester | 1997 |
| Atlas Hotels (Stevenage) Limited | Leicester | 2003 |
| Atlas Hotels (Stirling) Limited | Edinburgh | 1995 |
| Atlas Hotels (Stoke on Trent) Limited | Leicester | 1998 |
| Atlas Hotels (Taunton) Limited | Leicester | 1997 |
| Atlas Hotels (Trading) Limited | Leicester | 2006 |
| Atlas Hotels (Warwick) Limited | Leicester | 1997 |
| Atlas Hotels Limited | Leicester | 1996 |
| Atlas Hunt’S Cross Ltd | Liverpool | 2026 |
| Atlas Invest Ltd | London | 2021 |
| Atlas Kebab House Limited | Stafford | 2017 |
| Atlas Kebab Limited | Lincoln | 2025 |
| Atlas Lounge Limited | Thornton Heath | 2026 |
| Atlas NG Ltd | Liverpool | 2026 |
| Atlas Old Swan Ltd | Liverpool | 2026 |
| Atlas on SET Ltd | Leeds | 2024 |
| Atlas Oxford Ltd | Oxford | 2018 |
| Atlas Pizza Ltd | St Albans | 2026 |
| Atlas Prestige Ltd | London | 2025 |
| Atlas Property (London) Limited | | 1996 |
| Atlas Property Investments Limited | | 1999 |
| Atlas Sandwich Limited | London | 2024 |
| Atlas Serviced Accommodation Ltd | Coventry | 2018 |
| Atlas Shawarma Limited | Reading | 2026 |
| Atlas Shawarma One Ltd | Keighley | 2024 |
| Atlas Sovereign Ltd | London | 2024 |
| Atlas Stays Limited | London | 2024 |
| Atlas Takeaway Ltd | Lytham St. Annes | 2024 |
| Atlas UK Global Access Limited | Cardiff | 1988 |
| Atlas Venue and Studio Ltd | Cleethorpes | 2026 |
| Atlas Warrington Ltd | Warrington | 2026 |
| Atlas Workstay Solutions Limited | London | 2026 |
| Atlas World Food Ruthin Ltd | Ruthin | 2026 |
| ATLAS2 (Bicester) Limited | London | 2023 |
| ATLAS2 Hotels (Trading) Limited | London | 2021 |
| ATLAS2 Hotels Birmingham JQ Limited | London | 2021 |
| ATLAS4 Hotels (Folkestone Trading) Limited | London | 2024 |
| ATLAS4 Hotels Ltd | London | 2024 |
| Atlasfish Limited | Felixstowe | 2025 |
| Atlasway 4 Ltd | | 2000 |
| ATLETICO70 Ltd | Sunderland | 2026 |
| Atlis Properties Ltd | Leeds | 2025 |
| ATM (North East) Limited | Harrow | 2018 |
| ATM 1 Limited | Wolverhampton | 2025 |
| ATM Bar and Restaurants Ltd | Wickford | 2023 |
| ATM Developments Limited | Devon | 2003 |
| ATM ENT UK Ltd | Birmingham | 2022 |
| ATM Food Ltd | Pontypridd | 2023 |
| ATM Foods Supplier Ltd | Birmingham | 2025 |
| ATM Grill Ltd | London | 2022 |
| ATM Hospitality Limited | Isleworth | 2025 |
| ATM Leisure Ltd | Dunblane | 2018 |
| ATM Merrow Ltd | Guildford | 2024 |
| ATM Partnership Ltd | Mansfield | 2024 |
| Atmaca Essex Ltd | Loughton | 2024 |
| Atmk Ltd | Fareham | 2023 |
| Atmos Hospitality Group Ltd | Birmingham | 2026 |
| Atmos Restaurant Ltd | Birmingham | 2025 |
| Atmosphere Restaurant Limited | London | 2025 |
| Atmospheric Ltd | London | 2020 |
| Atmospheric PUB Company Limited | London | 2009 |
| Atmospresso Ltd | London | 2023 |
| Atmosveer Ltd | London | 2026 |
| ATN Cafes Ltd | Hollinwood | 2022 |
| ATN Estates Ltd | Kendal | 2025 |
| Atni Ltd | Craigavon | 2025 |
| Atns Solutions Limited | Manchester | 2014 |
| ATO Catering Ltd | Maidstone | 2017 |
| ATO Newcastle Ltd | Newcastle Upon Tyne | 2024 |
| ATO Treats Limited | London | 2024 |
| Ato&Mir Ltd | Redhill | 2025 |
| Atofi Ltd | Chatham | 2022 |
| Atogarden Ltd | London | 2023 |
| Atok Limited | London | 2024 |
| Atom 2.0 Ltd | London | 2019 |
| Atom Bar Hull Limited | Hull | 2022 |
| Atom Bars Ltd | York | 2024 |
| Atom Coffee Ltd. | Northampton | 2018 |
| Atom Facilities Ltd | Stevenage | 2008 |
| Atom Franchising Ltd | London | 2025 |
| Atom Ventures 2 Limited | Nottingham | 2023 |
| Atom Ventures Ltd | Nottingham | 2017 |
| Atomeca Deansgate Square Ltd | Stockport | 2021 |
| Atomeca Spinningfields Ltd | Stockport | 2023 |
| Atomic Buns Ltd | Oldham | 2025 |
| Atomic Business Ltd | Selby | 2019 |
| Atomic Cleaning and Catering Ltd | Bristol | 2019 |
| Atomic Events Ltd | Leicester | 2026 |
| Atomic Trading Co. Limited | Rugby | 2011 |
| Atomic Wings Ltd | London | 2020 |
| Aton Analytics Limited | London | 2015 |
| Atopas Fiveways Hospitality Ltd | Hull | 2026 |
| Ator Catering Ltd | London | 2018 |
| Atorro Sports Ltd | Christchurch | 2019 |
| Atour Hotel Ltd | New Malden | 2024 |
| Atousa.Anahita Event Limited | London | 2025 |
| Atoussa Ltd | Corby | 2025 |
| Atoy Venue Ltd | Sheffield | 2021 |
| Atoyen's Kitchen Ltd | West Bromwich | 2021 |
| Atoz Food Limited | Cardiff | 2026 |