| Trust Group Property Ltd | Construction | 2025 |
| Trust Hall Loans & Mortgages Ltd | Financial services | 2021 |
| Trxm Limited | Information & communication | 2020 |
| TS Pro Systems Ltd | Information & communication | 2025 |
| TUCKS10 Ltd | Hospitality | 2019 |
| Tudor Abel Financial Services Ltd | Arts & recreation | 2019 |
| Tudor-Davies Property Investments Limited | Real estate | 2017 |
| Tulu Hair Ltd | Manufacturing | 2026 |
| Tuno Ltd | Information & communication | 2018 |
| Turner Marketing Ltd | Professional & scientific | 2024 |
| TVC Removals Ltd | Transport & logistics | 2022 |
| Twenty 12 Flooring.Com Limited | Construction | 2015 |
| Twenty Twelve Investments Ltd | Real estate | 2022 |
| Twin Shores Ltd | Professional & scientific | 2021 |
| TXD Claims Limited | Professional & scientific | 2025 |
| TY Camlas (Barry) RTM Company Ltd | Households | 2021 |
| TY Huizen Limited | Real estate | 2026 |
| Ty'R Sianel (Barry) RTM Company Ltd | Households | 2021 |
| Tynewydd Inn Partnership Ltd | Hospitality | 2025 |
| Tyre Boss Holdings Ltd | Financial services | 2023 |
| Tyre Boss Ltd | Wholesale & retail | 2017 |
| Tyresave Ltd | Wholesale & retail | 2022 |
| UK PTS Ltd | Other services | 2017 |
| Ultimate Electrical Services Ltd | Construction | 2024 |
| Unequivocal Limited | Information & communication | 2025 |
| Unique Flooring (Wales) Limited | Construction | 2005 |
| Unit 15 Functional Fitness Ltd | Arts & recreation | 2020 |
| Unit 4 Limited | Real estate | 2021 |
| UP a Notch Films Limited | Information & communication | 2017 |
| Upvc Spraying Wales Ltd | Construction | 2019 |
| Urban Vapes Retail Ltd | Wholesale & retail | 2026 |
| Urbn Padel Co. Ltd | Arts & recreation | 2025 |
| Urvex Ltd | Construction | 2025 |
| USA Chick'N Ltd | Hospitality | 2025 |
| V P Skip Hire Limited | Water & waste | 2019 |
| V.O.G Automotive Limited | Wholesale & retail | 2025 |
| V.O.G Car Sales Limited | Wholesale & retail | 2025 |
| V3 Cladding Limited | Construction | 2025 |
| V3 Facilities Management Limited | Construction | 2025 |
| V3 Glazing Limited | Manufacturing | 2025 |
| V3 Group (EWI) Limited | Construction | 2024 |
| V3 Holdings Limited | Financial services | 2023 |
| V3 Plant Hire & Sales Limited | Administrative & support | 2024 |
| V3 Rail & Civils Ltd | Construction | 2025 |
| V3 Renewable Innovations Ltd | Professional & scientific | 2026 |
| V3 Trade Co. Limited | Administrative & support | 2026 |
| Vacavia Ltd | Administrative & support | 2020 |
| Vala Energy Limited | Hospitality | 2018 |
| Vale a Taxi Ltd | Transport & logistics | 2023 |
| Vale Aggregates Ltd | Wholesale & retail | 2013 |
| Vale Apiary Ltd | Agriculture & fishing | 2023 |
| Vale Arts Collective CIC | Arts & recreation | 2026 |
| Vale Balti Limited | Hospitality | 2025 |
| Vale CF Limited | Arts & recreation | 2021 |
| Vale Chicken Limited | Hospitality | 2026 |
| Vale Cleaning Services Limited | Administrative & support | 1977 |
| Vale Coast Scenic Limited | Construction | 2019 |
| Vale Coatings Ltd | Construction | 2024 |
| Vale Community Fitness CIC | Arts & recreation | 2020 |
| Vale Dental Centres Ltd | Health & social care | 2019 |
| Vale Domestic Abuse Services Ltd | Hospitality | 1993 |
| Vale EPC Ltd | Professional & scientific | 2023 |
| Vale Fire Extinguisher Services Ltd | Public administration | 2025 |
| Vale Foods 2018 Ltd | Wholesale & retail | 2018 |
| Vale Funerals Ltd | Other services | 2018 |
| Vale Futures Limited | Real estate | 2025 |
| Vale House Clearance Ltd | Transport & logistics | 2022 |
| Vale Laser Clinic Limited | Health & social care | 2015 |
| Vale Metals Ltd | Wholesale & retail | 2023 |
| Vale of Glamorgan Broadcasting Community Interest Company | Information & communication | 2007 |
| Vale of Glamorgan Music Academy Limited | Education | 2024 |
| Vale Performance Limited | Wholesale & retail | 2018 |
| Vale Plumbing Services Limited | Construction | 2026 |
| Vale QS Consultants Limited | Professional & scientific | 2018 |
| Vale RAW Store Limited | Wholesale & retail | 2021 |
| Vale Recycling Limited | Extraterritorial | 2006 |
| Vale Rentals Limited | Administrative & support | 2018 |
| Vale Roofing & Cladding Limited | Construction | 2009 |
| Vale Roofing Ltd | Construction | 2026 |
| Vale Solicitors Ltd | Professional & scientific | 2007 |
| Vale Stone Masonry Ltd | Construction | 2010 |
| Vale Taxis Limited | Transport & logistics | 2023 |
| Vale Tool Hire and D.I.Y. Ltd | | 1985 |
| Vale Venetian Ltd | Construction | 2021 |
| Vale Veterinary Centre Limited | Professional & scientific | 2016 |
| Vale View Barry Limited | Households | 2021 |
| VALE2VALLEY Limited | Construction | 2026 |
| Vapour LAB Elux Ltd | Wholesale & retail | 2026 |
| Vapour LAB Wholesalers Ltd | Wholesale & retail | 2026 |
| Varco Consultants Limited | Professional & scientific | 2012 |
| Varicol Design Limited | Extraterritorial | 2016 |
| Varlec Electrical Limited | Construction | 2024 |
| VBR Builders Ltd | Construction | 2026 |
| Vegan Muscle Coach Ltd | Other services | 2022 |
| Vegan Tiffin Limited | Hospitality | 2020 |
| Vehicles 4 Everyone Ltd | Wholesale & retail | 2021 |
| Velvet Lens Studio Ltd | Professional & scientific | 2026 |
| Verde Coffee Limited | Wholesale & retail | 2009 |
| Vere Street Tattoos Ltd | Other services | 2022 |
| Vertigo Access Group Limited | Professional & scientific | 2025 |