| 10 Below Limited | Wholesale & retail | 2019 |
| A C K L Services Limited | Construction | 2024 |
| A D Jones Funeral Directors Limited | Other services | 2021 |
| A G Heale Limited | Professional & scientific | 2003 |
| A Helping Hand Commercial Cleaning Limited | Administrative & support | 2023 |
| A&D Tree Care Limited | Administrative & support | 2024 |
| A.E.S Advanced Electrical Systems Ltd | Construction | 2020 |
| AAW Electrical Ltd | Construction | 2017 |
| AB Leisure Services Limited | Extraterritorial | 1999 |
| AB Rail Engineering Limited | Construction | 2017 |
| Abergorki Community Hall Limited | Other services | 1999 |
| ADA RCT Holdings Limited | Financial services | 2024 |
| Adexa Direct Limited | Wholesale & retail | 2017 |
| Alexandra Property Management Ltd | Real estate | 2024 |
| Allsorts Solutions Ltd | Construction | 2020 |
| ANH Stores Limited | Wholesale & retail | 2012 |
| Apiary Holdings Limited | Financial services | 2022 |
| Appora Apps Ltd | Information & communication | 2025 |
| Assure Fire Safety Solutions Ltd | Public administration | 2025 |
| Astral Pro FUR Ltd | Wholesale & retail | 2024 |
| Baglan Hotel Ltd | Hospitality | 2025 |
| Baguette Stop Limited | Hospitality | 2025 |
| Barren Land Clothing Ltd | Manufacturing | 2021 |
| Basildon Security Services Limited | Administrative & support | 2015 |
| Bath Golf and Footgolf Ltd | Arts & recreation | 2022 |
| Baybars Food Ltd | Hospitality | 2019 |
| Bazario Bazaar Ltd | Wholesale & retail | 2025 |
| Beachside Holdings Limited | Hospitality | 2022 |
| Beacons Cymru Music Industry Development CIC | Arts & recreation | 2024 |
| Beezy Ltd | Administrative & support | 2022 |
| Bespoke UK Capital Ltd | Financial services | 2023 |
| Black Gold Studios Ltd | Other services | 2026 |
| Bluebirds Travel Limited | Transport & logistics | 2012 |
| Borgo Foods Ltd | Hospitality | 2025 |
| Botanix Clinic Limited | Health & social care | 2025 |
| Britannia Health Care Solutions Ltd | Administrative & support | 2025 |
| Bubbles NOT Bombs C.I.C. | Health & social care | 2026 |
| Buidl Labs Ltd | Information & communication | 2025 |
| Bute ST Investments Limited | Financial services | 2022 |
| Butler Rail Ltd | Construction | 2017 |
| Byron Construction Ltd | Construction | 2022 |
| C & E Tattoo Ltd | Arts & recreation | 2023 |
| C Strinati Installations Ltd | Construction | 2015 |
| C.S.C Welding Ltd | Construction | 2022 |
| Cafe Valley Ltd | Hospitality | 2013 |
| Calgar Plumbing and Heating Ltd | Construction | 2022 |
| Cambria Sofas Ltd | Wholesale & retail | 2019 |
| Cambrian United Cafe Limited | Hospitality | 2026 |
| Camelot Court Developments Ltd | Real estate | 2011 |
| Candlesbyconnor Ltd | Wholesale & retail | 2025 |
| Cariad Co Living Ltd | Real estate | 2024 |
| Cartref Solutions Ltd | Construction | 2026 |
| Catereq Limited | Wholesale & retail | 2025 |
| CDJ Electrical Ltd | Construction | 2016 |
| CDW Cladding Systems Ltd | Construction | 2024 |
| Celtic Coffins Limited | Manufacturing | 2003 |
| Celtic Crown Cleaning Service Ltd | Administrative & support | 2026 |
| Central Bar & Catering Supplies Ltd | Wholesale & retail | 2010 |
| Ceri Smith Properties Limited | Real estate | 2024 |
| CH Broker Solutions Limited | Financial services | 2025 |
| Chickoland Treorchy Limited | Hospitality | 2022 |
| CJ Morris Cigydd Teulu Limited | Manufacturing | 2001 |
| CKR Motor Company Limited | Wholesale & retail | 2025 |
| Cloud Nine Coffee and Kitchen Limited | Hospitality | 2026 |
| Coffee 111 Limited | Hospitality | 2020 |
| Combat Training Centre Limited | Arts & recreation | 2021 |
| Community Support Companions Limited | Health & social care | 2025 |
| Compass Travel (Wales) Limited | Extraterritorial | 2012 |
| Concept Carpentry Services Limited | Construction | 2025 |
| Coresafe Environmental Limited | Construction | 2026 |
| Cornerways Software Ltd | Information & communication | 2022 |
| County Power Electrical Contractors Ltd | Construction | 2023 |
| Creative Services Limited | Arts & recreation | 1991 |
| CWM Rhondda Carpets Limited | Wholesale & retail | 2014 |
| Cwmparc Community Association | Other services | 2004 |
| Cymmer Workmen's Hall Ltd | Hospitality | 2019 |
| D Clothing CYF | Wholesale & retail | 2026 |
| Dare to Dream Consultancy Limited | Information & communication | 2024 |
| David R K Smith ENT Services Ltd | Health & social care | 2025 |
| DC12 Limited | Arts & recreation | 2021 |
| Decomate Ltd | Wholesale & retail | 2019 |
| Dema Fire & Security Ltd | Construction | 2019 |
| Direct Fire & Security Solutions Ltd. | Construction | 2024 |
| DJ Todd Limited | Construction | 2016 |
| Dlrendersystems Ltd | Construction | 2025 |
| Dream Nails Cardiff Limited | Other services | 2017 |
| Dylan's DEN | Education | 2008 |
| E11EVENS Brand Ltd | Manufacturing | 2019 |
| Easterkins Ltd | Manufacturing | 2019 |
| Ebenezer Arts and Heritage CIC | Arts & recreation | 2024 |
| EBT Drylining Ltd | Construction | 2020 |
| Ecoshield Windows Ltd | Construction | 2024 |
| Eforce Consulting Limited | Professional & scientific | 2019 |
| EJD Property Group Limited | Real estate | 2025 |
| Elsie Property Solutions Ltd | Real estate | 2026 |
| Empral Leisure Ltd | Wholesale & retail | 2018 |
| END of the Line Tattoo Studio Ltd | Arts & recreation | 2018 |
| Enomis Aerospace Solutions Limited | Professional & scientific | 2024 |
| Env-Cow Ltd | Professional & scientific | 2025 |
| Equip Logic Ltd | Wholesale & retail | 2025 |