| Yara Fruit & VEGETABLES1 Ltd | Wholesale & retail | 2025 |
| Yardview Limited | Construction | 2001 |
| YAS Lettings Ltd | Real estate | 2022 |
| Yasara App Ltd | Other services | 2026 |
| Yash Co Ltd | Hospitality | 2013 |
| Yashiro Ltd | Professional & scientific | 2025 |
| Yasin Mpharm Limited | Wholesale & retail | 2019 |
| Yasir ALI Ltd | Wholesale & retail | 2026 |
| Yates CTC Ltd | Real estate | 2020 |
| Yates Property Developments Limited | Construction | 2024 |
| Yau's Takeaway Ltd | Hospitality | 2024 |
| Yayberry Limited | Wholesale & retail | 2023 |
| YB Productions Limited | Professional & scientific | 2025 |
| YE26 Limited | Hospitality | 2025 |
| Yebega Real Estate Limited | Real estate | 2026 |
| Yellow Bear Property Ltd | Real estate | 2026 |
| Yellow Dog Venues and Sales Consultancy Ltd | Administrative & support | 2018 |
| Yellow Monday Media Limited | Wholesale & retail | 2018 |
| Yellow Rail Limited | Administrative & support | 2007 |
| Yellow Services Limited | Real estate | 2015 |
| Yellowstep B2B Limited | Professional & scientific | 2018 |
| Yendon Limited | Construction | 1978 |
| Yeni Raki of License Ltd | Wholesale & retail | 2025 |
| Yenkosi Limited | Health & social care | 2025 |
| Yeomans & Pavlou Property Group Limited | Real estate | 2025 |
| YES2HEALTHCARE Ltd | Health & social care | 2017 |
| Yettykin Ltd. | Hospitality | 2018 |
| YEW Tree Ventures Group Ltd | Financial services | 2026 |
| YF Assets Management Ltd | Real estate | 2025 |
| YI Kangtang Ltd | Transport & logistics | 2012 |
| Yielders Living Ltd | Real estate | 2026 |
| Yigit Barber Ltd | Other services | 2023 |
| YIH Property Holdings Limited | Real estate | 2019 |
| Yinkos Ltd | Information & communication | 2016 |
| Yinzcam Inc Limited | Information & communication | 2025 |
| Yizzle Limited | Manufacturing | 2026 |
| YJ GAS Solutions Ltd | Construction | 2026 |
| YJ Homes Ltd | Real estate | 2026 |
| YK Luxury Living Limited | Real estate | 2025 |
| YK Productions Ltd | Professional & scientific | 2021 |
| YKH Holdings Ltd | Professional & scientific | 2020 |
| YL 1987-2087 Ltd | Professional & scientific | 2020 |
| YM Group Bham Ltd | Hospitality | 2023 |
| Ymart Ltd | Wholesale & retail | 2020 |
| Ymca Derbyshire. | Hospitality | 1995 |
| Ymcad Property Development Limited | Construction | 2020 |
| Yoan Linx Limited | Construction | 2021 |
| Yogistic Solutions Limited | Transport & logistics | 2019 |
| Yogistic Transport Solutions Ltd | Transport & logistics | 2025 |
| Yoho Home Storage Products Ltd | Manufacturing | 2019 |
| Yojimbo Limited | Professional & scientific | 2017 |
| Yomaethel Ltd | Health & social care | 2022 |
| Yomdel Limited | Information & communication | 2012 |
| Yona Musicpreneur Ltd | Arts & recreation | 2022 |
| York Hospitality Ltd | Wholesale & retail | 2026 |
| Yorkshire Initiatives Limited | Financial services | 2014 |
| Yorkshire Spring Mineral Water Company Limited | Water & waste | 1969 |
| Yorkshire Spring Mineral Water Holdings Limited | Financial services | 2017 |
| Yorkshire Spring Water Limited | Extraterritorial | 2012 |
| Young Bull Ltd | Information & communication | 2025 |
| Young Business Limited | Financial services | 2024 |
| Young Cardinal Tattoo Limited | Other services | 2018 |
| Your Barber and Retail Shop Ltd | Wholesale & retail | 2025 |
| Your Boiler Ltd | Construction | 2013 |
| Your Choice a and J Support Ltd | Health & social care | 2017 |
| Your Daily Grind Limited | Hospitality | 2025 |
| Your Daily Spot Ltd | Wholesale & retail | 2026 |
| Your First AID Safety Training Ltd | Education | 2013 |
| Your First Choice Ltd | Hospitality | 2024 |
| Your Fleet Partner Ltd | Extraterritorial | 2015 |
| Your Garage Doors Ltd | Manufacturing | 2014 |
| Your Health 247 Limited | Administrative & support | 2023 |
| Your Lighthouse Counselling Ltd | Health & social care | 2023 |
| Your Local Convenience Limited | Wholesale & retail | 2017 |
| Your Machine Spares Ltd | Manufacturing | 2012 |
| Your Offer NOW Ltd | Education | 2019 |
| Your Organic Health Ltd | Wholesale & retail | 2024 |
| Your Payroll Bureau Limited | Professional & scientific | 2023 |
| Your People Partnership Ltd | Professional & scientific | 2024 |
| Your Plaice Fish Bar Ltd | Hospitality | 2020 |
| Your Point Limited | Other services | 2014 |
| Your Property PA Ltd | Extraterritorial | 2026 |
| Your Protection Guaranteed Limited | Financial services | 2024 |
| Your SA Ltd | Real estate | 2022 |
| Your Sunday League Ltd | Information & communication | 2016 |
| Your Wedding Angel UK Ltd | Other services | 2010 |
| Yousif Foods Limited | Hospitality | 2016 |
| Youth Empowered for Service CIC | Hospitality | 2022 |
| Youth Start Limited | Wholesale & retail | 2025 |
| Youth Therapy Service Ltd | Health & social care | 2015 |
| Yozecorp Limited | Wholesale & retail | 2025 |
| Ypaa Properties Limited | Real estate | 2025 |
| YR Taverns Limited | Hospitality | 2026 |
| Yris Limited | Health & social care | 2012 |
| YRS Globle Trade Limited | Wholesale & retail | 2024 |
| YS INT Limited | Other services | 2023 |
| YS Security Limited | Administrative & support | 2025 |
| YSD Limited | Education | 2022 |
| YSF 1 Limited | Professional & scientific | 2024 |
| YUA Limited | Professional & scientific | 2023 |