| Yeasyk Limited | Other services | 2005 |
| Yeats Electrical Ltd | Construction | 2022 |
| Yedidye Investments Ltd | Real estate | 2019 |
| Yedidyeh Investments 2 Ltd | Real estate | 2022 |
| Yellow Gorilla Limited | Professional & scientific | 2019 |
| Yellstar Limited | Real estate | 2015 |
| YES Property Services Ltd | Real estate | 2019 |
| Yeshiva Gedola Breslov Manchester UK Ltd | Education | 2025 |
| Yeshiva Ketane D'Satmar Ltd | Other services | 2019 |
| Yeshivas Beis Dovid | Other services | 2019 |
| Yess Cars Limited | Other services | 2019 |
| Yestalk Limited | Information & communication | 2025 |
| YET Consultants Limited | Professional & scientific | 2021 |
| YEW Estates Ltd | Real estate | 2019 |
| YF Estates Limited | Real estate | 2016 |
| YG Properties Ltd | Real estate | 2026 |
| YGB Estates Ltd | Real estate | 2017 |
| YH Estates Limited | Real estate | 2016 |
| Yhbuildingcomponents Ltd | Construction | 2026 |
| Yhlg Limited | Professional & scientific | 2019 |
| Yieldit Limited | Real estate | 2018 |
| Yinghao Network Technology Co. Ltd | Wholesale & retail | 2020 |
| Yingsou International Limited | Administrative & support | 2019 |
| YIR Estates 2 Ltd | Real estate | 2026 |
| YIR Estates Limited | Real estate | 2015 |
| Yisco Estates Ltd | Real estate | 2026 |
| Yitzchak Estates Ltd | Real estate | 2024 |
| YJ 2 Estate Ltd | Real estate | 2025 |
| YJ Estate Ltd | Real estate | 2020 |
| YK Deals Ltd | Health & social care | 2019 |
| YKL Holdings Ltd | Real estate | 2023 |
| YKP Consultancy Limited | Professional & scientific | 2019 |
| Ykvk Ltd | Manufacturing | 2026 |
| Ykykac Limited | Real estate | 2022 |
| Ykys Ltd | Real estate | 2021 |
| YMC Batim Ltd | Real estate | 2025 |
| YMF Estates Ltd | Real estate | 2017 |
| YMF Investments Ltd | Real estate | 2026 |
| YMH Estates Ltd | Real estate | 2022 |
| YMP Investments Ltd | Professional & scientific | 2005 |
| YMS Property Investments Ltd | Real estate | 2025 |
| YMY Estates Ltd | Real estate | 2025 |
| YN Estates Ltd | Real estate | 2021 |
| YN Plumbers Ltd | Construction | 2025 |
| YND Services Limited | Administrative & support | 2022 |
| YNS Estates Ltd | Real estate | 2026 |
| Yobis Renovations and Designs Ltd | Construction | 2022 |
| Yoels Kitchen Limited | Hospitality | 2020 |
| Yoels Services Limited | Other services | 2018 |
| Yolab Services UK Limited | Health & social care | 2025 |
| Yopes Ltd | Wholesale & retail | 2020 |
| Yorkshire Choice Homes SPV 1 Limited | Construction | 2021 |
| Yorkshire Choice Homes SPV 2 Limited | Construction | 2021 |
| Yorkshire Choice Homes SPV 5 Limited | Construction | 2022 |
| Yorkshire Choice Homes SPV 6 Limited | Construction | 2023 |
| Yorkshire Choice Homes SPV 7 Limited | Construction | 2023 |
| Yorkshire Choice Homes SPV 8 Limited | Construction | 2023 |
| Yosel Donkel Ltd | Manufacturing | 2025 |
| Yoshor Estates Ltd | Real estate | 2018 |
| Yossi MLM Ltd | Professional & scientific | 2021 |
| Yote Ltd | Other services | 2022 |
| Yoto Estates Limited | Real estate | 2024 |
| Young Professional Socials Limited | Other services | 2024 |
| Youngfore Ltd | Real estate | 2009 |
| Your Advanced Methods LAB Ltd | Information & communication | 2026 |
| Your Buddy Mary Limited | Manufacturing | 2016 |
| Your Home NW Ltd | Real estate | 2021 |
| Your Key Ltd | Wholesale & retail | 2013 |
| Your Nurseries Ltd | Health & social care | 2022 |
| Your Nursery Limited | Professional & scientific | 2009 |
| Yours Phone Shop Ltd | Wholesale & retail | 2023 |
| Yourself Yoga Limited | Education | 2022 |
| Youth Model Management Ltd. | Arts & recreation | 2016 |
| YP Club Group Limited | Other services | 2025 |
| YS Property Ltd | Real estate | 2016 |
| YSG Properties Limited | Real estate | 2021 |
| Ysns Ltd | Real estate | 2022 |
| Yspworld Ltd | Wholesale & retail | 2018 |
| Ysyk Limited | Real estate | 2023 |
| YTO Express (London) Limited | Transport & logistics | 2017 |
| YTO Express (Manchester) Limited | Transport & logistics | 2017 |
| YU Feng Global Ltd | Real estate | 2015 |
| Yuan Young Limited | Wholesale & retail | 2021 |
| Yucel Property Ltd | Real estate | 2025 |
| Yummy Zaika Limited | Hospitality | 2018 |
| Yung Designs Ltd | Wholesale & retail | 2022 |
| YY Chinuch Limited | Education | 2021 |
| YYG Properties Limited | Real estate | 2025 |
| YZ Property Ltd | Real estate | 2020 |
| Z and K Estates Ltd | Real estate | 2024 |
| Z Digital Ltd | Professional & scientific | 2024 |
| Z Line UK Limited | Wholesale & retail | 2022 |
| Z&A Partners Ltd | Information & communication | 2024 |
| Z&J Hybridgo Limited | Wholesale & retail | 2025 |
| ZA Trading MCR Ltd | Wholesale & retail | 2022 |
| Zabka Market (MCR) Ltd | Wholesale & retail | 2021 |
| Zabka Market (Salford) Ltd | Wholesale & retail | 2022 |
| Zaftig Estates Ltd | Real estate | 2025 |
| Zagros Bakehouse Ltd | Manufacturing | 2025 |
| Zaha Investment Ltd | Real estate | 2015 |