| Atlas Quant Ltd | Saffron Walden | 2025 |
| Atlas Quarry Ltd | London | 2026 |
| Atlas Reach Ltd | London | 2026 |
| Atlas Recruitment Technology Limited | London | 2022 |
| Atlas Red Two Ltd | London | 2024 |
| Atlas Retail Consultants Limited | Leicester | 1998 |
| Atlas Risk Advisory Ltd | London | 2026 |
| Atlas Rock Solutions Ltd | Woking | 2023 |
| Atlas Royalties Limited | London | 2026 |
| Atlas Rust Servers Ltd | Norton | 2021 |
| Atlas Seven Productions Ltd | Godalming | 2024 |
| Atlas Shrugged Consulting Limited | London | 2017 |
| Atlas Smart Technologies Ltd | Ballymena | 2021 |
| Atlas Soft DEV Ltd | Cardiff | 2025 |
| Atlas Software Limited | Exeter | 2005 |
| Atlas Solutions Group Limited | London | 2017 |
| Atlas Sports International Limited | Tipton | 2025 |
| Atlas Sportstech Holdings Ltd | Carrickfergus | 2021 |
| Atlas Stack Ltd | Dundee | 2025 |
| Atlas Sterling Mercantile Ltd | London | 2026 |
| Atlas Strategy Ltd | London | 2026 |
| Atlas Studios Group Ltd | High Wycombe | 2026 |
| Atlas Support Limited | London | 2018 |
| Atlas Systems Limited | Northampton | 2011 |
| Atlas Tech & IT Solutions Ltd | Croydon | 2017 |
| Atlas Tech Consultancy Limited | London | 2023 |
| Atlas Tech Ltd | Borehamwood | 2019 |
| Atlas Tech Solutions Ltd | Manchester | 2024 |
| Atlas Technica UK Holdings Ltd | London | 2022 |
| Atlas Technica UK Ltd | London | 2016 |
| Atlas Technologies Ltd | London | 2012 |
| Atlas Technology Consultants Limited | London | 2017 |
| Atlas Technology Group Ltd | Birmingham | 2019 |
| Atlas Technology Limited | Croydon | 2024 |
| Atlas Technology Mapping Ltd | Kington | 2019 |
| Atlas Television Limited | London | 2002 |
| Atlas Testing Services Ltd. | Nottingham | 2015 |
| Atlas Tower Group Limited | Glastonbury | 2018 |
| Atlas Transformation Limited | Woodford Green | 2020 |
| Atlas Trekkers Limited | London | 2024 |
| Atlas Vanquish Ltd | London | 2024 |
| Atlas Verum Limited | London | 2026 |
| Atlas Vision Innovations Limited | Covent Garden | 2023 |
| Atlas Wonders Consulting Ltd | London | 2025 |
| Atlas-Hub Consulting Ltd | London | 2019 |
| ATLAS07 Limited | London | 2019 |
| ATLAS21 Global Ltd | London | 2024 |
| Atlasapollo Limited | Gaerwen | 2025 |
| Atlasbiomics Ltd | Newcastle Upon Tyne | 2024 |
| Atlascape Ltd | London | 2022 |
| Atlascomms Ltd | Ayr | 2025 |
| Atlasconnect Limited | Perth | 2003 |
| Atlasctc Limited | London | 2017 |
| Atlasd Systems Ltd | Ashford | 2025 |
| Atlasecure Ltd | Edinburgh | 2020 |
| Atlasi Ltd | London | 2022 |
| Atlasica Ltd | Sevenoaks | 2023 |
| Atlasmatch AI Ltd | London | 2026 |
| Atlasmere Ltd | Ilford | 2025 |
| Atlasmotive Ltd | Leicester | 2024 |
| Atlaspoint Limited | Ashford | 2013 |
| Atlass Company Ltd | London | 2024 |
| Atlasservers Ltd | London | 2025 |
| Atlassian (Australia) Limited | London | 2013 |
| Atlassian (UK) Holdings Limited | London | 2017 |
| Atlassian (UK) Limited | London | 2013 |
| Atlassian (UK) Operations Limited | London | 2014 |
| Atlassian Corporation Limited | London | 2013 |
| Atlassic Future Ltd | London | 2026 |
| Atlastone Ltd | London | 2026 |
| Atlasvale Ltd | London | 2025 |
| Atlasweave Ltd | London | 2026 |
| Atlaswise Limited | Oxford | 2024 |
| Atlasyn Ltd | London | 2025 |
| Atlasync AI Ltd | London | 2025 |
| Atlax Labs Ltd | London | 2026 |
| Atlaxer Ltd | East Ham | 2021 |
| Atlc Ltd | Sheerness | 2024 |
| Atlee Phoenix Studios Ltd | Watford | 2024 |
| Atletico SAP Limited | Glasgow | 2015 |
| Atlf Limited | London | 2018 |
| Atli Ventures Ltd | Manchester | 2024 |
| Atlichna Limited | London | 2022 |
| Atlify Ltd | Chertsey | 2022 |
| Atlio Ltd | Southall | 2021 |
| Atlis Solutions Ltd | Basildon | 2017 |
| Atlive Ltd | Swindon | 2017 |
| Atlon Professional Services Ltd | Manchester | 2025 |
| Atlonglast Analytics Ltd | Mildenhall | 2025 |
| Atlum Limited | St. Albans | 2016 |
| Atlusgb Ltd | West Drayton | 2024 |
| Atlz Ltd | London | 2025 |
| ATM Communications Limited | Manchester | 2001 |
| ATM Group Digital Services Ltd | Leicester | 2016 |
| ATM Parts Company Limited | Hook | 2019 |
| Atm-Dev Limited | Bishop'S Stortford | 2016 |
| ATM29 Ltd | Milton Keynes | 2021 |
| ATM8 Ltd | Iver | 2026 |
| Atma AI Limited | Dundee | 2024 |
| Atma Music Limited | London | 2024 |