| 6E Consulting Ltd | Godalming, | 2015 |
| 6F Proactive Engineering and Management Ltd | Buckingham | 2025 |
| 6FIGURE Earner Ltd | London | 2025 |
| 6FN Ltd | York | 2025 |
| 6G Limited | Sheffield | 2008 |
| 6H Buyers Ltd | Liversedge | 2026 |
| 6HM Ltd | Bath | 2009 |
| 6IX Creative Ltd | Beaumaris | 2020 |
| 6IX Managed Solutions Ltd | Erith | 2019 |
| 6IX Media Group Limited | Glasgow | 2020 |
| 6IXPROCESSDESIGN Limited | Bath | 2021 |
| 6IXSIDE Digital Ltd | Bury St. Edmunds | 2026 |
| 6IXTH Sense Solutions Limited | Ruislip | 2008 |
| 6IXTY 3HREE Limited | Edinburgh | 2019 |
| 6JD Engineering Limited | Barnard Castle | 2014 |
| 6KI Limited | London | 2018 |
| 6LY Holdings Ltd | Felixstowe | 2024 |
| 6M Limited | Blackburn | 2026 |
| 6MG Ltd | Billericay | 2025 |
| 6P'S Consultancy Limited | Thirsk | 2006 |
| 6P'S Programming Ltd | Thirsk | 2024 |
| 6PI Consulting Ltd | Banchory | 2015 |
| 6PM Holdings Limited | York | 2004 |
| 6POINT626 Consultancy Services Ltd | Brentford | 2023 |
| 6Q Marketing Ltd | West Byfleet | 2017 |
| 6R Media Limited | Isle Of South Uist | 2023 |
| 6REN Limited | Macclesfield | 2021 |
| 6S Consulting Ltd | London | 2025 |
| 6S Infinity Ltd | Beckenham | 2013 |
| 6S People and Business Consultancy Ltd | Nantwich | 2023 |
| 6SCONSULT ICT Limited | | 2005 |
| 6SIGMADC Limited | Bracknell | 2004 |
| 6SIX9 Ltd | Ellesmere Port | 2019 |
| 6T3 (UK) Ltd. | Market Harborough | 2019 |
| 6TEN Management Ltd | London | 2024 |
| 6TH Door Ltd | Leyland | 2011 |
| 6TH Gear Coaching and Consultancy Ltd | Purley | 2021 |
| 6TH MAN Consulting Ltd | Bristol | 2023 |
| 6TH Sense Digital Marketing Ltd | Birmingham | 2024 |
| 6THSENSEUK Ltd | West Linton | 2025 |
| 6WAS9 Design Co. Ltd. | Stockton-On-Tees | 2024 |
| 6WAVES Consulting Ltd | London | 2019 |
| 6YP Consulting Ltd | Worcester | 2015 |
| 7 & 8 Darlington Street Management (Bath) Limited | Bath | 1978 |
| 7 Accountants and Advisors Ltd | London | 2025 |
| 7 Ace Management Ltd | Ilford | 2019 |
| 7 Ackroyd Road Limited | London | 2002 |
| 7 Advisory Limited | Cambridge | 2024 |
| 7 Atherton Street Management Company Limited | London | 2013 |
| 7 Black Water Engineering Ltd | Banbury | 2025 |
| 7 Cantelupe Limited | East Grinstead | 2006 |
| 7 Cavendish Limited | London | 2019 |
| 7 Consultancy (UK) Limited | London | 2014 |
| 7 Consulting & Management Services Limited | Broadway | 2006 |
| 7 Continental Careers Ltd | London | 2025 |
| 7 Couleurs Ltd | Melton Mowbray | 2018 |
| 7 Crystal Palace Park Road Freehold Limited | London | 2008 |
| 7 Day Ventures Limited | London | 2025 |
| 7 Degrees South Limited | Kingston Upon Thames | 2002 |
| 7 Delta Ltd | Sutton | 2022 |
| 7 Double 7 Ltd | Teddington | 2023 |
| 7 Elements Global Limited | Wokingham | 2017 |
| 7 Engineering Consultancy Limited | Warminster | 2010 |
| 7 Gate Consulting Ltd | Sowerby Bridge | 2013 |
| 7 GEN Analytics Ltd | Catterick Garrison | 2017 |
| 7 Genetics Ltd | Chelmsford | 2025 |
| 7 Group (Ciaic) Limited | Keighley | 2022 |
| 7 Hallam Mews (Garage) Limited | | 1989 |
| 7 Hills Mortgages Limited | Sheffield | 2023 |
| 7 Hills Sports Marketing Ltd | Sheffield | 2025 |
| 7 Hopes Ltd | London | 2018 |
| 7 KBW Limited | London | 2002 |
| 7 Kensington Park Road Limited | London | 1997 |
| 7 Kingdon Road Limited | London | 1997 |
| 7 Larden Road Acton Management Company Limited | London | 1996 |
| 7 Lawyers Limited | Oldham | 2024 |
| 7 Links Accounting Ltd | Ruislip | 2023 |
| 7 Miles a Minute Ltd | Sherborne | 2016 |
| 7 Millennium Drive E14 RTM Company Limited | London | 2014 |
| 7 Montpelier Freehold Limited | London | 2008 |
| 7 Oceans Consultancy Limited | Preston | 2025 |
| 7 Oceans Engineering Ltd | Brighton | 2023 |
| 7 Pillars Consulting Limited | Frome | 2014 |
| 7 Pillars Holdings Ltd | Rainham | 2025 |
| 7 Pinnacles Training and Consulting Limited | London | 2012 |
| 7 Pips Limited | Richmond | 2020 |
| 7 Piquet Road Limited | London | 2004 |
| 7 Plus Ltd | Wigan | 2024 |
| 7 PLY Studio Limited | Wirral | 2025 |
| 7 Projects Inc Ltd | Hayes | 2022 |
| 7 RDD Limited | York | 2009 |
| 7 River Capital Limited | London | 2024 |
| 7 Rosary Gardens Limited | Cardiff | 2015 |
| 7 Rungs Ltd | Southampton | 2026 |
| 7 Seas Engineering Services Ltd | Norwich | 2013 |
| 7 SFI Limited | Andover | 2014 |
| 7 Shades Limited | Swindon | 2025 |
| 7 Shellhouse | London | 2009 |
| 7 Sixty 2 Limited | London | 2024 |
| 7 Squared Design Ltd | Woking | 2025 |