| Atlanta Designs Ltd | Bristol | 2023 |
| Atlanta Pallets Limited | Bradford | 2017 |
| Atlanta Stone World Ltd | Slough | 2025 |
| Atlanta Trust Limited | Folkestone | 1976 |
| Atlantamed Limited | London | 2019 |
| Atlantean Graphics Limited | Chesterfield | 2024 |
| Atlantechs Limited | Towcester | 1990 |
| Atlantia UK Ltd | London | 2012 |
| Atlantic & Peninsula Marine Services Limited | Hebburn | 2011 |
| Atlantic Aero Engineering Ltd | Buckfastleigh | 2020 |
| Atlantic Archipelago Limited | Hainford, Norwich | 2023 |
| Atlantic Blue Seafoods Limited | Grimsby | 2014 |
| Atlantic C.S.P. Limited | Leeds | 2000 |
| Atlantic Campers Ltd | London | 2025 |
| Atlantic Canvas Limited | Gosport | 2020 |
| Atlantic Coast Studios Ltd | Tewkesbury | 2003 |
| Atlantic Contract Furnishings Limited | Southampton | 2023 |
| Atlantic Cooling Limited | Bolton | 2020 |
| Atlantic Design Print Ltd | Bolton | 2023 |
| Atlantic Diesel Services Limited | Ringwood | 2007 |
| Atlantic Distillery Ltd | Newquay | 2017 |
| Atlantic Distributions Ltd | London | 2018 |
| Atlantic Energies Ltd | Newport | 2025 |
| Atlantic Fabrications Ltd | Leicester | 2011 |
| Atlantic Fire Ltd | London | 2016 |
| Atlantic Fluid Tech Limited | Coventry | 2009 |
| Atlantic Fork Lifts Limited | Newcastle Upon Tyne | 1998 |
| Atlantic Garden Limited | Musselburgh | 2023 |
| Atlantic Glass Works Ltd | Launceston | 2016 |
| Atlantic Group Trading Ltd | Plymouth | 2004 |
| Atlantic Hardware Ltd | Wrexham | 2009 |
| Atlantic Hydraulics Limited | London | 2025 |
| Atlantic Inertial Systems Limited | Plymouth | 2007 |
| Atlantic Innovations International Limited | Preston | 2019 |
| Atlantic Joinery Services Limited | Birmingham | 2000 |
| Atlantic Kitchen Ltd | London | 2021 |
| Atlantic Machinery Limited | Bridgend | 1994 |
| Atlantic Makers Ltd | Bude | 2019 |
| Atlantic Marine Interiors Limited | Christchurch | 2010 |
| Atlantic Metal Fabrication Limited | Clacton-On-Sea | 2017 |
| Atlantic Metal Solutions Ltd | East Tilbury | 2015 |
| Atlantic Online Ltd | London | 2022 |
| Atlantic Plastics Limited | Bridgend | 1974 |
| Atlantic Pods Limited | Bude | 2012 |
| Atlantic Polymers Limited | Cardiff | 1994 |
| Atlantic Powder Coating Ltd | London | 2023 |
| Atlantic PPE & Workwear Solutions Ltd | Wakefield | 2018 |
| Atlantic Precision Engineering Limited | Yateley | 1989 |
| Atlantic Printing Ltd | Cardiff | 2024 |
| Atlantic Property & Marine Limited | Kington | 2014 |
| Atlantic Propulsion Ltd | Southampton | 2024 |
| Atlantic Pumps Limited | Chesterfield | 2015 |
| Atlantic Refrigeration Limited | Lee On Solent | 1985 |
| Atlantic Research Chemicals Limited | Bude | 2005 |
| Atlantic Rigging Ltd | Helston | 2022 |
| Atlantic Rubber & Plastic Limited | Walsall | 1997 |
| Atlantic Seaweeds Ltd | Antrim | 2026 |
| Atlantic Security London Ltd | London | 2015 |
| Atlantic Service Company (U.K.) Limited | Blackwood | 1974 |
| Atlantic Shutters Limited | Leeds | 2013 |
| Atlantic Signs (Cornwall) Limited | Plymouth | 2010 |
| Atlantic Superyacht Services Ltd | Bury | 2018 |
| Atlantic Technology Limited | Godalming | 2016 |
| Atlantic Track International (UK) Limited | Quedgeley | 2022 |
| Atlantico Intelligent Limited | Daventry | 2020 |
| Atlantis Cake Ltd | London | 2021 |
| Atlantis Capital Invest Ltd | Bury | 2014 |
| Atlantis Caps Limited | Bexley | 2012 |
| Atlantis Electric Limited | Bolton | 2019 |
| Atlantis Engineering and Consulting Limited | London | 2021 |
| Atlantis Holdco UK Limited | London | 2019 |
| Atlantis Industrial Cooling Ltd | Doncaster | 2023 |
| Atlantis Industrial Ltd | Potters Bar | 2014 |
| Atlantis International Limited | Banbury | 1995 |
| Atlantis Operations (UK) Limited | London | 2008 |
| Atlantis Skincare Ltd | Radstock | 2015 |
| Atlantis Space Ltd | Luton | 2025 |
| Atlantis Spas and Hot Tubs Limited | Teignmouth | 2026 |
| Atlantis Water Treatment Limited | Suffolk | 1999 |
| Atlantisgroundworks Limited | Downham Market | 2026 |
| Atlantus Fragrances Ltd | London | 2019 |
| Atlas & I Ltd | Barnsley | 2013 |
| Atlas & Poole Holdings Ltd | London | 2024 |
| Atlas (Scotland) Limited | Kilmarnock | 2003 |
| Atlas 21 Ltd | Warrington | 1958 |
| Atlas Aerospace Ltd. | Farnborough | 2018 |
| Atlas Aircraft Limited | Luton | 2007 |
| Atlas Alarms Limited | Blackburn | 1983 |
| Atlas Automatics Ltd | Stoke-On-Trent | 2006 |
| Atlas Automobiles UK Ltd | Windsor | 2022 |
| Atlas Autoparts Limited | | 2007 |
| Atlas Beverages Ltd. | London | 2019 |
| Atlas Blinds Ltd | Bolton | 2022 |
| Atlas Brewery Limited | Nairn | 2006 |
| Atlas Carpentry Ltd | West Malling | 2022 |
| Atlas Carre Ltd | Richmond | 2023 |
| Atlas Cleaning Machines Ltd | Burton On Trent | 2011 |
| Atlas Clinical Limited | Lichfield | 1990 |
| Atlas Coating Limited | Stafford | 2000 |
| Atlas Combustion Engineering Limited | Gravesend | 1994 |