| 180 Club Ltd | Other services | 2025 |
| 1927 Holdings Limited | Professional & scientific | 2019 |
| A & S HCW Ltd | Wholesale & retail | 2020 |
| A S M 4X4 Specialist Ltd | Wholesale & retail | 2018 |
| A Splash of Glass Limited | Wholesale & retail | 2016 |
| A Wells & Sons Ltd | Transport & logistics | 2017 |
| A&A Freight Movement Ltd | Transport & logistics | 2026 |
| A&Gw Ltd | Hospitality | 2025 |
| A&R PEN Solutions Limited | Wholesale & retail | 2012 |
| A,C,E's Boutique Ltd | Extraterritorial | 2024 |
| Abertillery Cricket Ltd | Arts & recreation | 2024 |
| ABJ Consultants Ltd | Health & social care | 2026 |
| Academii Limited | Education | 2019 |
| ACC Carpentry Ltd | Construction | 2013 |
| Adam & Bethan Limited | Wholesale & retail | 2018 |
| Adre Limited | Wholesale & retail | 2026 |
| Agile Web Development Limited | Information & communication | 2020 |
| Aifinity Limited | Professional & scientific | 2025 |
| Aldanya Group Ltd | Wholesale & retail | 2025 |
| Alex (LV) Ltd | Hospitality | 2023 |
| ALJ Valley Developments Ltd | Real estate | 2024 |
| Alkod Trade International UK Limited | Wholesale & retail | 1993 |
| ALL Sorts Motor Company Ltd | Wholesale & retail | 2015 |
| ALS Managed Services (Holdings) Limited | Professional & scientific | 2018 |
| ALS Managed Services (Topco) Limited | Professional & scientific | 2021 |
| ALS Managed Services Limited | Professional & scientific | 2013 |
| ALS Professional Limited | Professional & scientific | 2023 |
| Ame-Aero Ltd | Transport & logistics | 2020 |
| Ame-Max Limited | Administrative & support | 2018 |
| AND Fast Foods Ltd | Hospitality | 2011 |
| Andrea Dixon Yearsley Ltd | Health & social care | 1998 |
| Andrew Berry Jewellery Limited | Wholesale & retail | 2023 |
| Anthony James QP and Pharma Consultancy Ltd | Professional & scientific | 2021 |
| AP Logistics Solutions Ltd | Professional & scientific | 2009 |
| APC Labour Supply Limited | Construction | 2020 |
| Arches Support Services Limited | Health & social care | 2017 |
| Arella Creations Limited | Manufacturing | 2007 |
| Art Carwash Limited | Administrative & support | 2025 |
| Art Motor Group Limited | Wholesale & retail | 2025 |
| Aspire and Learn Ltd | Education | 2013 |
| Asset 247 Limited | Financial services | 2024 |
| Athena Training Academy Limited | Education | 2026 |
| Avenwills Properties Ltd | Real estate | 2023 |
| AVF Windows Ltd | Manufacturing | 2017 |
| Awelenna Ltd. | Wholesale & retail | 2026 |
| B.A.N Rigging Ltd | Construction | 2020 |
| Backstage Holdings Ltd | Wholesale & retail | 2025 |
| Baked Pebble Ltd | Wholesale & retail | 2023 |
| Balch Mortgages Ltd | Financial services | 2022 |
| Benchmark Decorators Ltd | Construction | 2021 |
| Bentleys Boutique Ltd | Other services | 2021 |
| BEW Civil Engineering Ltd | Construction | 2025 |
| Bien Developments Ltd | Real estate | 2025 |
| Biotage GB Limited | Manufacturing | 1971 |
| Black & Brown Holdings Ltd | Real estate | 2020 |
| Blck Collection Ltd | Administrative & support | 2023 |
| Boardman Planning Limited | Professional & scientific | 2017 |
| Bobbies's Autos Ltd | Wholesale & retail | 2025 |
| Bramil Group Ltd | Wholesale & retail | 2026 |
| Britannia Day Nursery Limited | Health & social care | 2009 |
| Brittart Creations Ltd | Wholesale & retail | 2025 |
| BRO International Ltd | Wholesale & retail | 2024 |
| Brooks Care Angels Ltd | Public administration | 2021 |
| BRP Properties 1 Limited | Real estate | 2024 |
| Bryn Aggregates Limited | Mining & quarrying | 2013 |
| Bryn Compost Limited | Water & waste | 2004 |
| Bryn Meadows Golf & Country Club Limited | Hospitality | 1986 |
| Bryn Power Limited | Energy | 2012 |
| C.B. Refrigeration Limited | Manufacturing | 1985 |
| C@T Solutions Ltd | Information & communication | 2022 |
| Caerphilly Borough Mind | Health & social care | 2008 |
| Caledan Limited | Manufacturing | 2011 |
| Calonweb Solutions Limited | Information & communication | 2012 |
| Camilleri Construction Services Limited | Professional & scientific | 2022 |
| Camilleri Rail Limited | Administrative & support | 2015 |
| Can'T Stop Plumbing Ltd | Construction | 2020 |
| Cartrefi Furmage Ltd | Real estate | 2022 |
| Castlestone Group Ltd | Construction | 2026 |
| CBR Group Ltd | Financial services | 2016 |
| Cbrt Group Ltd | Financial services | 2020 |
| Celtic Oriental Holdings Limited | Manufacturing | 2026 |
| Celtic Oriental Limited | Manufacturing | 2010 |
| Chantiz Ltd | Wholesale & retail | 2026 |
| Cherry DEVELOPMENTS(2025) Limited | Real estate | 2025 |
| Chevler Limited | Manufacturing | 2008 |
| Chris Morgan Illustrator Limited | Arts & recreation | 2023 |
| Ciaran Osborne Limited | Transport & logistics | 2025 |
| Ciprian Logistics Ltd | Transport & logistics | 2018 |
| Classy Claws Beauty Salon Ltd | Other services | 2007 |
| Clean Host Ltd | Administrative & support | 2024 |
| Cleeves Bespoke Woodworks Limited | Manufacturing | 2025 |
| Clsm Heating and Plumbing Ltd | Construction | 2020 |
| CNB Homes Ltd | Real estate | 2024 |
| Coconutacha Ltd | Arts & recreation | 2021 |
| Combuy Limited | Manufacturing | 1999 |
| Cooks Coffee Limited | Manufacturing | 2025 |
| Cool Calm Collective Clothing Limited | Wholesale & retail | 2026 |
| Coombes & Cole Limited | Financial services | 2025 |
| Corepliance Ltd | Information & communication | 2025 |
| Costa Pittance Properties Limited | Construction | 2026 |