| Adam Slama Studio Limited | London | 2019 |
| Adam Slater Limited | New Romney | 2006 |
| Adam Smith Asset Management Limited | Blairgowrie | 2004 |
| Adam Smith Group Limited | Blairgowrie | 2004 |
| Adam Smith International Ltd | London | 1992 |
| Adam Smith Property Management Limited | Blairgowrie | 2004 |
| Adam Smith Research Consulting Ltd | Wimborne | 2026 |
| Adam Smith Statistics Ltd | Heworth | 2025 |
| Adam Solicitors Limited | Manchester | 2012 |
| Adam Soloman Consulting Limited | Keighley | 2019 |
| Adam Southwell Media Limited | Mediacityuk | 2018 |
| Adam Spacey Ltd | Ledbury | 2022 |
| Adam Stamp Limited | Altrincham | 2006 |
| Adam Staples Ltd | Brentwood | 2014 |
| Adam Street Advisers Limited | London | 2015 |
| Adam Stringer Holdings Limited | Tiptree | 2012 |
| Adam Strong Consulting Ltd | Windsor | 2014 |
| Adam Studio Ltd | Wolverhampton | 2025 |
| Adam Subsea Limited | Stonehaven | 2004 |
| Adam Tahir Wills Ltd | Bedford | 2024 |
| Adam Tallamy Ltd | Lowestoft | 2017 |
| Adam Thomas - Landscape Design Ltd. | London | 2009 |
| Adam Thompson Consulting Ltd | London | 2025 |
| Adam Todd Design Management Limited | Liverpool | 2021 |
| Adam UK Ltd | Meopham | 2003 |
| Adam Walker Consultancy Ltd | Northampton | 2022 |
| Adam Walker Limited | Lewes | 2019 |
| Adam Watts Design Ltd | West Wickham | 2011 |
| Adam Whitehead Photography Limited | London | 2008 |
| Adam Whitmore Consulting Limited | Woking | 2015 |
| Adam Willis Ltd | Wisbech | 2023 |
| Adam Wilson & Sons (Holdings) Limited | Troon | 2002 |
| Adam Wright Limited | Cardiff | 2014 |
| Adam&Eve\Tbwa Limited | London | 1968 |
| Adam's & Co Services Limited | London | 2025 |
| Adam's Apple Marketing Limited | Nottingham | 2026 |
| Adam's Safety Solutions Limited | Carlisle | 2020 |
| Adam'Z Tyre'Z Ltd | Bradford | 2025 |
| Adama Capital Limited | Redhill | 2024 |
| Adama Consulting Limited | Potters Bar | 2009 |
| Adama Holding Limited | London | 2019 |
| Adama Maiga Ltd | London | 2018 |
| Adama Sentina Ltd | Chatham | 2023 |
| Adamairmechanic Ltd | Wrecsam | 2025 |
| Adamant Accountants Ltd | London | 2016 |
| Adamant Advisory Limited | Gerrards Cross | 2025 |
| Adamant Business Accounting Ltd | London | 2021 |
| Adamant Composites UK Ltd | Cambridge | 2023 |
| Adamant Investment Partners Ltd | Godstone | 2015 |
| Adamant Technology Services Limited | London | 2015 |
| Adamantine Limited | Wallington | 2016 |
| Adamantium Holdings Limited | London | 2020 |
| Adamantium Legal Limited | London | 2015 |
| Adamas Accountancy and Business Services Limited | Watford | 2025 |
| Adamas Consult Ltd | Amersham | 2025 |
| Adamas Consulting Group Limited | Guildford | 2012 |
| Adamas Consulting Limited | Guildford | 1997 |
| Adamas Fides Limited | Sevenoaks | 2026 |
| Adamas Global Consulting Ltd | Birmingham | 2025 |
| Adamas Industries Limited | Ely | 1989 |
| Adamas Invest Limited | London | 2008 |
| Adamas Telecoms Limited | Brentwood | 2019 |
| Adamas Wind Limited | Northampton | 2019 |
| Adamastor Capital Ltd | London | 2025 |
| Adamaxlabs Ltd | London | 2026 |
| Adamco Ltd | Romsey | 2026 |
| Adamford Limited | Ilford | 1983 |
| Adamfromgraphics Limited | Manchester | 2022 |
| Adamgray Financial Services Ltd | Southampton | 2009 |
| Adamhindmarchphotography Limited | Manchester | 2023 |
| Adamia Ltd | Chelmsford | 2019 |
| Adamian Thomas Consulting Limited | Swansea | 2002 |
| Adaminafs Limited | Birmingham | 2023 |
| Adamir Solicitors Ltd | London | 2018 |
| Adammo Limited | Brentwood | 2017 |
| Adamo AI Limited | London | 2026 |
| Adamo Marketing Solutions Limited | Reading | 2025 |
| Adamo Surveying Ltd | Pershore | 2016 |
| Adamoli Consulting Limited | Sale | 2023 |
| Adamotive Limited | Bradford | 2013 |
| Adamou Ltd | Ipswich | 2011 |
| Adampeerphotography Ltd | London | 2025 |
| Adamplify Limited | Preston | 2026 |
| Adampol Advisors Ltd | London | 2017 |
| Adams & Co Immigration Services Limited | London | 2017 |
| Adams & Co. Accountancy Ltd. | Clitheroe | 2014 |
| Adams & Company Accountants Limited | Snodland | 2022 |
| Adams & Moore (NRL) Ltd | Dartford | 2020 |
| Adams & Moore Limited | Dartford | 2005 |
| Adams & Poole Financial Services Ltd | Uttoxeter | 2024 |
| Adams & Remers Limited | East Sussex | 1996 |
| Adams & Ryley Ltd | Hayling Island | 2011 |
| Adams & Sutherland Limited | London | 2001 |
| Adams Accountancy (Bexley) Limited | Bexley | 2015 |
| Adams Accountancy UK Ltd | Dewsbury | 2009 |
| Adams Accountants Ltd | Sunderland | 2019 |
| Adams Accounting Limited | Altrincham | 1999 |
| Adams Accounting Services Ltd | Stalybridge | 2016 |
| Adams Advisory Ltd | London | 2021 |
| Adams Aerial Photography Limited | Chester | 2025 |