| Yogeshwar Plaspax UK Limited | Wholesale & retail | 2014 |
| Yogi Motors UK Ltd | Wholesale & retail | 2022 |
| Yohancy Enterprises Limited | Construction | 2000 |
| Yoku Ventures UK Ltd | Real estate | 2024 |
| Yonas Afro Ltd | Wholesale & retail | 2012 |
| Yongaar Enterprises Limited | Financial services | 2019 |
| YOO Build One UK Ltd | Construction | 2023 |
| Yoocial Ltd | Information & communication | 2022 |
| Yorubadboi Music ( Ybbm) Limited | Information & communication | 2024 |
| YOU Want IT I GOT IT Limited | Wholesale & retail | 2018 |
| Youcefcherfi Limited | Construction | 2021 |
| Youdance Ltd | Arts & recreation | 2017 |
| Youdevelop Limited | Professional & scientific | 2008 |
| Youdrone Ltd | Wholesale & retail | 2022 |
| Young Achievers Housing Services Ltd | Real estate | 2024 |
| Youngerwood Consultancy LP | | 2023 |
| Your Care, WE Provide Ltd | Health & social care | 2024 |
| Your Delivery Solution Ltd | Transport & logistics | 2023 |
| Your First Serve Limited | Real estate | 2023 |
| Your Project Manager Limited | Construction | 2023 |
| Your Property Needs Ltd | Real estate | 2018 |
| Your Shine Future Campus Ltd | Wholesale & retail | 2025 |
| Your Style DRY Cleaning Ltd | Other services | 2023 |
| Yours Next Limited | Professional & scientific | 2013 |
| Yoursexclusive Ltd | Professional & scientific | 2011 |
| YPO Consultancy Limited | Education | 2013 |
| Yqup Ltd | Information & communication | 2003 |
| YT Property Management Ltd | Real estate | 2021 |
| YTS Estates Limited | Real estate | 2016 |
| Yuan TAI Healthcare Ltd | Health & social care | 2014 |
| Yuansiu Southsea Ltd | Hospitality | 2026 |
| YUM London Ltd | Financial services | 2020 |
| Yummi Yummi Ltd | Hospitality | 2024 |
| Yummies Pizza Brighton Ltd | Hospitality | 2026 |
| Yummies Shakes Limited | Wholesale & retail | 2023 |
| Yummy 2 Ltd | Hospitality | 2022 |
| Yummy City Ltd | Hospitality | 2024 |
| Yummy WOK (Tullibody) Ltd | Hospitality | 2024 |
| Yurta Ltd | Real estate | 2019 |
| Yuva Skin Limited | Health & social care | 2015 |
| Yuvani Radiance Limited | Other services | 2024 |
| YV Consultants Ltd | Administrative & support | 2019 |
| YV Consulting Ltd | Information & communication | 2025 |
| YV Global Limited | Wholesale & retail | 2012 |
| YV Group Limited | Financial services | 2018 |
| Yvell Properties Limited | Real estate | 2015 |
| YY Trading Ltd | Wholesale & retail | 2020 |
| YYG Construction Ltd | Construction | 2022 |
| Yyqm Limited | Wholesale & retail | 2023 |
| Z Chauffeuring Ltd | Transport & logistics | 2023 |
| Z H Management Limited | Real estate | 2002 |
| Z Media Technologies Ltd | Information & communication | 2025 |
| Z S Investments Ltd | Real estate | 2016 |
| Z Samadi Properties Ltd | Real estate | 2022 |
| Z&J Professionals Ltd | Hospitality | 2021 |
| ZA Aviation Limited | Administrative & support | 2012 |
| Zaana Ltd | Real estate | 2024 |
| Zaat Ltd | Financial services | 2020 |
| Zadran Motors Ltd | Wholesale & retail | 2025 |
| Zafar Prime Ltd | Administrative & support | 2026 |
| Zafay Global Ltd | Wholesale & retail | 2026 |
| Zaga Tiling Limited | Other services | 2021 |
| Zahab Services Ltd | Construction | 2023 |
| Zaher Supermarket Ltd | Wholesale & retail | 2024 |
| Zahra Beauty Pro Ltd | Other services | 2025 |
| Zaish Global Resources Limited | Wholesale & retail | 2009 |
| ZAK Chauffeurs Ltd | Transport & logistics | 2025 |
| Zalmi Food Ltd | Hospitality | 2025 |
| Zalsa Ltd | Wholesale & retail | 2021 |
| ZAM ZAM Halal Meat London Ltd | Wholesale & retail | 2024 |
| Zambrand Limited | Wholesale & retail | 2009 |
| Zanta Training Ltd | Professional & scientific | 2026 |
| Zantix Limited | Transport & logistics | 2016 |
| Zapropos Ltd | Professional & scientific | 2018 |
| Zara Enterprises Limited | Wholesale & retail | 2017 |
| Zara Trade Ltd | Construction | 2022 |
| Zaradan Limited | Information & communication | 2008 |
| Zarakian Consultants Limited | Professional & scientific | 2009 |
| Zarzor Limited | Hospitality | 2023 |
| Zayra Cart Ltd | Wholesale & retail | 2025 |
| Zazen Innovations Ltd | Manufacturing | 2023 |
| Zazi Tyres Limited | Wholesale & retail | 2022 |
| ZBK Property Limited | Households | 2024 |
| ZC Maintenance Limited | Construction | 2020 |
| Zeeloger Ltd | Information & communication | 2025 |
| Zeerak Properties Limited | Real estate | 2015 |
| Zegush International Ltd | Other services | 2025 |
| Zein Foundation | Information & communication | 2018 |
| Zein Properties Limited | Real estate | 2018 |
| Zeloria Ltd | Wholesale & retail | 2025 |
| Zemritetrans Ltd | Transport & logistics | 2022 |
| ZEN Rebels Limited | Wholesale & retail | 2020 |
| Zenara Trading Ltd | Wholesale & retail | 2024 |
| Zendraa Ltd | Wholesale & retail | 2025 |
| Zendrive Ltd | Administrative & support | 2026 |
| Zener Holdings Limited | Real estate | 2016 |
| Zenmax Investments Limited | Real estate | 2017 |
| Zenml Limited | Professional & scientific | 2024 |
| Zenster Limited | Wholesale & retail | 2025 |
| Zenten Limited | Real estate | 2024 |