| Coremarket Goods Ltd | Wholesale & retail | 2024 |
| Cosyglaze Ltd | Construction | 2026 |
| Creative Fabrication and Welding Ltd | Manufacturing | 2022 |
| Crownedge Cleaning Services Ltd | Manufacturing | 2026 |
| Cwmni D B CYF | Professional & scientific | 2003 |
| Cwmni SSI CYF | Real estate | 2018 |
| Cymorth Clubb CYF | Information & communication | 2018 |
| Cynhyrchiadau Ceidiog Creations CYF | Information & communication | 1996 |
| Dalen (Llyfrau) CYF | Information & communication | 2011 |
| DAVID58 Ltd | Transport & logistics | 2026 |
| DC Plastering and Rendering Ltd | Construction | 2025 |
| Decode&Grow Ltd | Professional & scientific | 2025 |
| Dentiserve Ltd | Professional & scientific | 2026 |
| Design Authority Limited | Extraterritorial | 2021 |
| Design Dough Ltd | Professional & scientific | 2006 |
| DEV SW Ltd | Information & communication | 2025 |
| DH LG Homes Limited | Real estate | 2025 |
| Dharris Ltd | Transport & logistics | 2026 |
| Dincom Ltd | Wholesale & retail | 2025 |
| DKO Security Ltd | Administrative & support | 2026 |
| DM Aesthetic Dream Ltd | Health & social care | 2023 |
| Donnelly Dynasty Ltd | Real estate | 2025 |
| Dorsett and Buns Ltd | Hospitality | 2026 |
| Dorsett and SON Ltd | Professional & scientific | 2025 |
| Dotton Corporation Ltd | Real estate | 1989 |
| DR RH Rhys CYF. | Health & social care | 2019 |
| DR V Chouhan Ltd | Health & social care | 2024 |
| DRE Management Ltd | Real estate | 2026 |
| Drivewithdrew Ltd | Transport & logistics | 2026 |
| DUL GAL Ltd | Construction | 2026 |
| Dutton Glass Repair Limited | Professional & scientific | 2025 |
| Dynamic Painting & Decorating Limited | Construction | 2026 |
| Dyno Engineering Ltd | Professional & scientific | 2025 |
| Ebfoodsltd Ltd | Hospitality | 2026 |
| Echelon Property Services Ltd | Construction | 2026 |
| Echogenix Ltd | Health & social care | 2024 |
| Efiemma Ltd | Wholesale & retail | 2026 |
| EHJ Associates Ltd | Professional & scientific | 2025 |
| EL Ventures Limited | Education | 2025 |
| Elfen CYF | Professional & scientific | 2007 |
| Elite Solutions 360 Ltd | Professional & scientific | 2026 |
| Ellis Smokes Ltd | Hospitality | 2026 |
| Elva Hair Ltd | Other services | 2022 |
| ELY My Barber Ltd | Other services | 2026 |
| Emma Smith Communications Ltd | Professional & scientific | 2026 |
| Etienne Demogeot Ltd | Transport & logistics | 2026 |
| Falcon Fire Risk Prevention Ltd | Professional & scientific | 2025 |
| Falcon Roadways Ltd | Transport & logistics | 2026 |
| Familybrain Ltd | Information & communication | 2026 |
| Farm Box Limited | Wholesale & retail | 2024 |
| Fast Quote Ltd | Information & communication | 2026 |
| Fast Waste Ltd | Water & waste | 2026 |
| FCG Systems Ltd | Information & communication | 2026 |
| Ffilm Ffolyn CYF | Information & communication | 2015 |
| Finanfba Ltd | Wholesale & retail | 2024 |
| Flexi Care on Call Limited | Health & social care | 2025 |
| Florentia Property Ltd | Real estate | 2026 |
| Foca LAB Ltd | Manufacturing | 2026 |
| FOR Shakers Ltd | Professional & scientific | 2025 |
| Fourteen Two Property Ltd | Real estate | 2022 |
| Fourwheelfinish Ltd | Administrative & support | 2025 |
| Freshly Cleaned Ltd | Administrative & support | 2024 |
| FTA Labs Ltd | Information & communication | 2026 |
| Funkypadels Ltd | Wholesale & retail | 2026 |
| Furniture Factory Group Ltd | Wholesale & retail | 2025 |
| Fusion Flexible FBA Limited | Wholesale & retail | 2024 |
| Gareth Shears Media Ltd | Information & communication | 2025 |
| Garth Glamping Ltd | Hospitality | 2025 |
| Gatehouse Source & Supply Ltd | Wholesale & retail | 2006 |
| Gauntlett Group Ltd | Real estate | 2026 |
| Genesis Business Limited | Professional & scientific | 2018 |
| GFB105 Ltd | Hospitality | 2025 |
| Giovetti Limited | Wholesale & retail | 2024 |
| GN Electric & Renovation Ltd | Construction | 2026 |
| Godsun Limited | Manufacturing | 2026 |
| Golu E-Commerce Services Ltd | Wholesale & retail | 2026 |
| Gout Delish Ltd | Hospitality | 2026 |
| Grant Sinclair Fulfilment Ltd | Wholesale & retail | 2025 |
| Grime Reapers Cleaners Ltd | Administrative & support | 2026 |
| Gwyrdd Records Ltd | Information & communication | 2024 |
| Gym Cafe Solutions Ltd | Manufacturing | 2026 |
| Hafan Ltd | Health & social care | 2026 |
| Hafiz Rafiullah Ltd | Transport & logistics | 2026 |
| Handypro Maintenance Ltd | Construction | 2025 |
| Haus Carpentry & Construction Ltd | Manufacturing | 2026 |
| Haws Ltd | Wholesale & retail | 2019 |
| Head and Neck Ultrasound CYF. | Education | 2023 |
| Healthbe Ltd | Health & social care | 2023 |
| Heart@ Rentals Ltd | Real estate | 2026 |
| Helium Care Integrated Services Ltd | Hospitality | 2026 |
| Helix OPS Ltd | Professional & scientific | 2024 |
| Hematim Global Ltd | Professional & scientific | 2026 |
| Herne-For Meat’S Sake Ltd | Manufacturing | 2026 |
| HK Global Ventures Ltd | Transport & logistics | 2025 |
| HNH Marketing Ltd | Professional & scientific | 2026 |
| Horizon and Co Solutions Ltd | Wholesale & retail | 2026 |
| House of Joy Services Limited | Transport & logistics | 2025 |
| Houseproud Cleaning & Organisation Ltd | Administrative & support | 2025 |
| HRM Trading Ltd | Wholesale & retail | 2025 |
| Husky Investments Ltd | Professional & scientific | 2026 |