| 1 Call Construction Group Limited | Manufacturing | 2024 |
| 3 IS Family Ltd | Real estate | 2025 |
| 3D-PARTS Ltd | Manufacturing | 2010 |
| A 55 Landscaping Limited | Construction | 2023 |
| A S K Contractors Ltd | Construction | 2001 |
| A Star Support Group Ltd | Professional & scientific | 2018 |
| A Star Support Services Group Ltd | Financial services | 2026 |
| A Star Support Services Ltd | Health & social care | 2014 |
| Abakhan Storage Ltd | Transport & logistics | 2025 |
| Abbey Care (NW) Limited | Health & social care | 2012 |
| Abbey Manor NW Limited | Real estate | 2005 |
| Abbeysage Limited | Professional & scientific | 1996 |
| Aberconwy Limited | Hospitality | 2011 |
| Access Eco Limited | Administrative & support | 2019 |
| Access to CBT Ltd | Health & social care | 2015 |
| Additive Futures Ltd | Professional & scientific | 2016 |
| Adref Medical Ltd | Transport & logistics | 2024 |
| Adrian Waters Architecture Ltd | Extraterritorial | 2011 |
| Advnsys UK Holding Limited | Financial services | 2025 |
| Aelwyn Ltd | Information & communication | 2026 |
| Aerosolutions Marketing Limited | Professional & scientific | 2013 |
| Alarms R Fixed UK Ltd | Manufacturing | 2013 |
| Aled Davies Agricultural Contracting Ltd | Agriculture & fishing | 2022 |
| ALL Round Construction Ltd | Construction | 2018 |
| ALL Round Consultancy Ltd | Professional & scientific | 2014 |
| Alper Healthcare Ltd | Administrative & support | 2019 |
| Alper Virtual Tours Ltd | Professional & scientific | 2020 |
| Ambience Events Limited | Arts & recreation | 2011 |
| Amir Pharma Ltd | Wholesale & retail | 2022 |
| Amlec Ltd | Construction | 2018 |
| AMT Business Consultancy Limited | Professional & scientific | 2023 |
| Amullholland Ltd | Information & communication | 2019 |
| Andy Buchanan Limited | Professional & scientific | 2014 |
| Ankles Trimly Limited | Professional & scientific | 2013 |
| Aovidi Ltd | Wholesale & retail | 2019 |
| Artisan Living Company Limited | Wholesale & retail | 2021 |
| Arwelfa Ltd | Hospitality | 2021 |
| Arwyn Parry Construction Services Limited | Construction | 2012 |
| Aunty Vikki's Pet Services Ltd | Other services | 2025 |
| Automobilist Limited | Real estate | 2005 |
| Ayrview Caravan Sales and Repairs Ltd | Hospitality | 2024 |
| B & J Scaffolding Northwest Ltd | Construction | 2010 |
| B C Farms Ltd | Agriculture & fishing | 2025 |
| B H Home Services Limited | Administrative & support | 2023 |
| B Harrison Services Ltd | Wholesale & retail | 2014 |
| Bagillt Heritage Society | Education | 2013 |
| Bailey & Oliver Limited | Administrative & support | 2014 |
| Barlow Classic Engineering Limited | Professional & scientific | 2021 |
| Baron Super Limited | Construction | 1996 |
| Beata Baran (NW) Ltd | Professional & scientific | 2025 |
| Becarezz CIC | Health & social care | 2025 |
| Beswick Brothers Bloodstock Ltd | Agriculture & fishing | 2019 |
| BET 666 Ltd | Extraterritorial | 2006 |
| Betty Berkins Ltd | Hospitality | 2026 |
| Bevisory Ltd | Information & communication | 2024 |
| Beyondlean Limited | Professional & scientific | 2006 |
| BGB Group Global Ltd | Construction | 2007 |
| BGB International Energy Services Ltd | Construction | 2026 |
| BGB Lettings Ltd | Hospitality | 2022 |
| BGB Renewables Ltd | Professional & scientific | 2023 |
| BGB Scaffolding Group Global Ltd | Construction | 2024 |
| Billie Williams Management Limited | Hospitality | 2022 |
| Billrick Limited | Wholesale & retail | 1983 |
| Bilt Limited | Extraterritorial | 2004 |
| Biokinetics Limited | Manufacturing | 2002 |
| BIS Connect Training Ltd | Education | 2024 |
| BKB Solutions Limited | Transport & logistics | 2018 |
| Blue Pebble Ltd | Information & communication | 2022 |
| Blush Publishing Limited | Manufacturing | 2006 |
| Bonwood Properties Limited | Real estate | 2022 |
| Bookmachine Ltd | Information & communication | 2019 |
| Boss Horseboxes Ltd | Manufacturing | 2020 |
| Bridge Scour Management to CS 469 Limited | Construction | 2024 |
| Bridlewood Livery Yard Limited | Agriculture & fishing | 2024 |
| Brownbill Heritage Ltd | Construction | 2026 |
| C & M L Consultants Limited | Professional & scientific | 2016 |
| C Y Civils Ltd | Construction | 2022 |
| Cain Architectural Services Limited | Professional & scientific | 2014 |
| Calcoed Vets Limited | Professional & scientific | 2021 |
| CAM 3D Ltd | Manufacturing | 2020 |
| Candid Canine Ltd | Agriculture & fishing | 2018 |
| Cannon Christian Properties Ltd | Real estate | 2001 |
| Caravan Estate Agent Ltd | Administrative & support | 2016 |
| Caravan Move Ltd | Real estate | 2025 |
| Carreg Elwy Limited | Construction | 2019 |
| Carreg Elwy Stonemasonry Limited | Construction | 2019 |
| Carriages of Distinction Limited | Wholesale & retail | 2003 |
| Cars of Conwy Limited | Wholesale & retail | 2011 |
| Castle Oak Flintshire Ltd | Wholesale & retail | 2022 |
| Cat Amongst Limited | Professional & scientific | 2026 |
| Cdia Technologies Limited | Information & communication | 2026 |
| Celt Rowlands & Co Limited | Real estate | 2003 |
| Celtic Interior Construction Limited | Construction | 2007 |
| Centriblast Abrasives Limited | Wholesale & retail | 2026 |
| Centriblast Global Holdings Limited | Financial services | 2022 |
| Ceyin Ltd | Information & communication | 2018 |
| Chapel Marketing and Management Consultancy Ltd | Professional & scientific | 2011 |
| Charlotte Eleanor Group CYF | Wholesale & retail | 2025 |
| Check Chicken Ltd | Hospitality | 2026 |
| Cheeky Fragrance Ltd | Wholesale & retail | 2018 |