| UK Golfollo International Chemical Ltd | Wholesale & retail | 2025 |
| UK Grid Solutions Limited | Manufacturing | 2003 |
| UK Hongcanxing New Energy Technology Development Limited | Manufacturing | 2023 |
| UK Huangshi Share Limited | Manufacturing | 2019 |
| UK Imaginary Space Labs Limited | Information & communication | 2024 |
| UK Inomos Group Limited | Information & communication | 2021 |
| UK Jianshan International Cultural Media Limited | Wholesale & retail | 2024 |
| UK Jiashile OIL Ltd | Extraterritorial | 2018 |
| UK Jingou Group Limited | Wholesale & retail | 2021 |
| UK Kadim Import & Export Group Limited | Manufacturing | 2023 |
| UK Kelly Anda Management Consulting Co., Ltd | Financial services | 2021 |
| UK Kesenor Plant Protection Group Co., Ltd | Mining & quarrying | 2024 |
| UK Key Solutions Ltd | Wholesale & retail | 2026 |
| UK Keyoumi Import and Export Trading Ltd | Wholesale & retail | 2025 |
| UK Kgmt Technology Ltd. | Wholesale & retail | 2021 |
| UK Kuimo Group Limited | Mining & quarrying | 2022 |
| UK Langsea International Group Limited | Extraterritorial | 2020 |
| UK London Huiqu Travel Technology Co., Limited | Information & communication | 2023 |
| UK Mach Limited | Extraterritorial | 2013 |
| UK Maierxun Agriculture Co., Ltd. | Manufacturing | 2024 |
| UK Milestrong Intelligent Technology Ltd | Manufacturing | 2025 |
| UK MK International Co. Ltd. | Wholesale & retail | 2024 |
| UK Nobecare Bioenergy Technology Co., Ltd. | Mining & quarrying | 2025 |
| UK Noer Biotech Group Ltd | Manufacturing | 2023 |
| UK Norton Technology Co., Ltd. | Manufacturing | 2025 |
| UK Omecca International Ltd | Professional & scientific | 2013 |
| UK Opuzi Group Ltd | Wholesale & retail | 2021 |
| UK Oxford Technology Group Co., Ltd | Wholesale & retail | 2025 |
| UK PDK Synthetic Lubricating OIL Limited | Extraterritorial | 2015 |
| UK Pegasus Daily Cosmetics Group Co., Ltd | Extraterritorial | 2017 |
| UK Perfect Technology Co., Ltd | Wholesale & retail | 2024 |
| UK Prime Technology International Ltd | Professional & scientific | 2010 |
| UK Project Services Limited | Construction | 2018 |
| UK Rockthanh Industry Limited | Manufacturing | 2019 |
| UK Roland Biotechnology Co., Ltd. | Extraterritorial | 2019 |
| UK Rostiute Limited | Extraterritorial | 2024 |
| UK Sansar Estate Agency Ltd | Real estate | 2024 |
| UK Sansar Ltd | Administrative & support | 2025 |
| UK Shenglong International Trade Co., Ltd. | Wholesale & retail | 2025 |
| UK Shilaifeng International Holding Ltd | Extraterritorial | 2016 |
| UK Sinosia Business Limited | Wholesale & retail | 2020 |
| UK Slip Resistance Group Ltd | Other services | 2017 |
| UK Stam International Agriculture Group Co., Ltd. | Extraterritorial | 2021 |
| UK Sumeiling Group Biotechnology Co., Ltd | Wholesale & retail | 2025 |
| UK Sunlight Trading Co., Ltd | Wholesale & retail | 2025 |
| UK Trsuoo Limited | Extraterritorial | 2020 |
| UK Unicorn Media Cultural Media Co., Ltd | Wholesale & retail | 2025 |
| UK Vision Workshop Media Co., Ltd | Information & communication | 2025 |
| UK Wanhui Culture Media Co., Ltd. | Information & communication | 2025 |
| UK Xiao Arong Cultural Media Limited | Wholesale & retail | 2025 |
| UK Yingshanyao Interactive Entertainment Media Co., Ltd | Information & communication | 2025 |
| UK Yinian Culture Media Co., Ltd | Information & communication | 2026 |
| UK Yourui Ltd | Wholesale & retail | 2024 |
| UK Yuhuai Trading Co., Limited | Wholesale & retail | 2025 |
| UK Zechengen Int'L Trade Ltd | Wholesale & retail | 2011 |
| Uk.Sunnice Tech Co., Ltd | Wholesale & retail | 2023 |
| UKD SERVICE24 Ltd | Construction | 2024 |
| Ukkn Ltd | Financial services | 2025 |
| Ukurs Limited | Administrative & support | 2023 |
| Ullur Electronics Ltd | Manufacturing | 2023 |
| Ultimate Access Hire Limited | Administrative & support | 2019 |
| Ultra Performance Engineering Ltd | Manufacturing | 2018 |
| Ultrabright Connect Ltd | Other services | 2015 |
| Ultraviolet Engineering Solutions Ltd | Professional & scientific | 2023 |
| Umiayo Business Ltd | Wholesale & retail | 2025 |
| Underhill Limited | Agriculture & fishing | 2022 |
| Unichase Dragon Ltd | Wholesale & retail | 2025 |
| Unifix Roofing Ltd | Construction | 2017 |
| Unify Wizards Ltd | Information & communication | 2022 |
| Uniqueovie Services Ltd | Other services | 2022 |
| Unit 1 Scenery Ltd | Arts & recreation | 2019 |
| Unity Carpentry & Joinery Limited | Manufacturing | 2025 |
| Universal Rubber Company Limited | Extraterritorial | 2003 |
| Unsilicons Rights Ltd | Wholesale & retail | 2021 |
| Untamed Orchard Ltd | Hospitality | 2026 |
| Untapped Analytics Ltd | Information & communication | 2026 |
| Unusual Furnishing Company Limited(The) | Manufacturing | 1986 |
| UOR Trade (UK) Co., Ltd | Wholesale & retail | 2025 |
| Updogservices Limited | Other services | 2022 |
| Upholstery Services (Stafford) Ltd | Other services | 2016 |
| Uppal Group Ltd | Real estate | 2021 |
| Upper Moreton Rural Activities CIC | Other services | 2015 |
| Upsune Ltd | Wholesale & retail | 2025 |
| Upton&Upton Accountancy Limited | Professional & scientific | 2020 |
| Urad Middle Banner Jianuo Energy Co., Ltd | Wholesale & retail | 2026 |
| Usamasun Ltd | Wholesale & retail | 2023 |
| Usense Data Services UK Ltd | Information & communication | 2023 |
| Utility Consultants (Staffs) Limited | Administrative & support | 2021 |
| Utopia Clubs Limited | Arts & recreation | 2001 |
| V L Walker Limited | Professional & scientific | 2016 |
| V&I Investments Ltd | Real estate | 2021 |
| V&R Group Limited | Real estate | 2021 |
| V.S.S. Properties Ltd | Real estate | 2021 |
| V1 Automation Limited | Information & communication | 2017 |
| V2 Buildworx Limited | Construction | 2015 |
| V66 Management Services Ltd | Real estate | 2025 |
| V66GYM Consultants Ltd | Arts & recreation | 2022 |
| V8 (International) Limited | Transport & logistics | 2010 |
| VAE Care CIC | Information & communication | 2020 |
| Vaishnav Limited | Health & social care | 2014 |