| Alan W Haird Ltd | Dyfed | 2003 |
| Alan W. Simons Limited | Bournemouth | 2003 |
| Alan Wade Site Engineering Limited | Bristol | 1997 |
| Alan Walker Consultancy Limited | London | 2013 |
| Alan Walter Limited | Hertfordshire | 2002 |
| Alan Water Ltd | Slough | 2024 |
| Alan Waterfield Consulting Limited | Kendal | 2009 |
| Alan Watt Limited | London | 2018 |
| Alan Wheatley Investments Limited | Sevenoaks | 2015 |
| Alan White Housing Limited | Deal | 2018 |
| Alan Wilde Engineering Ltd | Newcastle | 2019 |
| Alan Wilkins Ltd | Kingston Upon Thames | 2024 |
| Alan Williams Associates Ltd | Bristol | 2012 |
| Alan Wilson Consultancy Ltd | London | 2025 |
| Alan Winstanley Ltd | Grimsby | 2020 |
| Alan Wood & Partners Limited | North Humberside | 1991 |
| Alan Wood Partnership Limited | | 1986 |
| Alan Woodbridge Limited | Dolgellau | 2003 |
| Alan Woods Associates Limited | Southwold | 2002 |
| Alan Wrigley Associates Limited | York | 1999 |
| Alana Donnachie Ltd | St. Neots | 2025 |
| Alana Jade Ltd | Henley-On-Thames | 2018 |
| Alana Jones Consulting Ltd | Coventry | 2026 |
| Alana Keating Ltd | London | 2018 |
| Alana Marketing Ltd | Watford | 2002 |
| Alana Rail Ltd | Doncaster | 2024 |
| Alana Ventures Ltd | London | 2025 |
| Alanah Limited | Horsham | 2010 |
| Alanalanalan Limited | Chester Le Street | 2015 |
| Alanbridge Limited | Hamilton | 2007 |
| Alanbrookes Limited | Holt | 2003 |
| Alancordell Limited | Kingston Upon Thames | 2019 |
| Alancy Limited | London | 2025 |
| Aland Engineering Consultancy Ltd | Camberley | 2024 |
| Aland Productions Ltd | London | 2019 |
| Alanda Management Limited | London | 2015 |
| Alandac Limited | Richmond | 2025 |
| Alandale Logistics (Northern) Limited | Beckenham | 2010 |
| Alandale Partnerships Limited | Coventry | 2003 |
| Alandem Consulting Limited | Clevedon | 2009 |
| Alando Design Ltd | Brough | 2014 |
| Alane Lunn Solicitor Limited | Ongar | 2021 |
| Alanf Group Ltd | Andover | 2021 |
| Alanfal Limited | London | 2015 |
| Alangbarr Ltd | St Ives | 2022 |
| Alanh Consulting Limited | Bristol | 2008 |
| Alani Consulting Services Ltd. | London | 2023 |
| Alanichi Limited | London | 2015 |
| Alanis Engineering Ltd. | Stonehaven | 2007 |
| Alanjonesuk Ltd | St. Austell | 2024 |
| Alanka Ltd | Uxbridge | 2019 |
| Alankaya Business Consulting Ltd | London | 2019 |
| Alanmo Consultancy Limited | Purley | 2015 |
| Alannah Limited | Brighton | 2014 |
| Alannah Maria Legal Services Ltd | Northwood Hills | 2022 |
| Alannah Portway Consultancy Services Ltd | Chipstead | 2024 |
| Alanson Solutions Ltd | Bolton | 2018 |
| Alansway Consultants Limited | South Shields | 2017 |
| Alantera Unlimited | Didcot | 2015 |
| Alantis Group Limited | Liverpool | 2018 |
| Alantis Holdings Ltd | London | 2018 |
| Alanya Marketing Ltd | London | 2020 |
| Alapog Consulting Ltd | Banchory | 2014 |
| Alar Capital Limited | East Malling | 2025 |
| Alar Consulting Limited | Haslemere | 2014 |
| Alara Chapters Media Ltd | London | 2024 |
| Alara Consult Limited | Bournemouth | 2024 |
| Alara Group Ltd | Liverpool | 2025 |
| Alara Limited | | 1985 |
| Alara Talent Ltd | Newcastle Upon Tyne | 2026 |
| Alara Technology Services Ltd | London | 2021 |
| Alarab in UK Multimedia Production Ltd | London | 2019 |
| Alaray Ltd | Kington | 2018 |
| Alarcon Construction Services Limited | London | 2017 |
| Alard Engineering Consultants Ltd | Warrington | 2019 |
| Alares Limited | Windsor | 2018 |
| Alaric & Associates Limited | London | 2020 |
| Alaric Advisors UK Ltd | London | 2025 |
| Alaris Consulting Ltd | London | 2025 |
| Alark Consultancy Limited | Maldon | 2023 |
| Alarm Growth Ltd | London | 2025 |
| Alarm Maintenance Company Limited | Aberdeen | 2001 |
| Alarm Response and Guarding Ltd | Templecombe | 2022 |
| Alarm Tech Ltd | Manchester | 2009 |
| Alarm Testing Ltd | Portsmouth | 2021 |
| Alaromora Ltd | London | 2024 |
| Alarp Engineering Services Limited | Nottingham | 2014 |
| Alarp Risk Management Limited | Keighley | 2018 |
| Alas Services Limited | Sheffield | 2003 |
| Alasdair Cant & Associates Limited | Cambridgeshire | 2005 |
| Alasdair Griffiths Ltd | Sheffield | 2016 |
| Alasdair Hobbs Limited | Telford | 2014 |
| Alasdair Marks Sustainability Consulting Ltd | Farnham | 2021 |
| Alasdair Mckenzie Ltd | Poundbury | 2015 |
| Alasdair Mclay Consulting Limited | Derby | 2016 |
| Alasdair Mclellan Limited | London | 2006 |
| Alasdair Mcnab QS Limited | Montrose | 2014 |
| Alasdair Nicholson Community Development Consultant Ltd | Isle Of Lewis | 2025 |
| Alasdair Walker Ltd | Dunoon | 2014 |
| Alasdair Williams Consulting Limited | Fleet | 2021 |