| Xhausts Limited | Wholesale & retail | 2026 |
| Xing Mark Limited | Wholesale & retail | 2013 |
| Xold Pro Limited | Wholesale & retail | 2025 |
| Xorvia Group Ltd | Financial services | 2026 |
| Xpand Design Ltd | Professional & scientific | 2020 |
| Xpand Ltd | Professional & scientific | 2025 |
| Xpress Fast Food NE Ltd | Hospitality | 2025 |
| Xtreme Learning Limited | Professional & scientific | 2011 |
| Xtreme Xperts Stokesley Ltd | Wholesale & retail | 2026 |
| Y & L Consultancy Ltd | Professional & scientific | 2025 |
| Y & S Construction Limited | Construction | 2003 |
| Y Storey Engineering Services Ltd | Professional & scientific | 2017 |
| Y&R Transport Company Limited | Transport & logistics | 2025 |
| Y&Y Locum and Properties Ltd | Real estate | 2014 |
| Y.B.Co. UK Ltd | Real estate | 2025 |
| Yaniq Properties Ltd | Real estate | 2026 |
| YAQ Investments Ltd | Real estate | 2021 |
| Yara 2 Properties Ltd | Financial services | 2022 |
| Yarakala Ltd | Construction | 2025 |
| Yard Bar (Stockton) Ltd | Hospitality | 2025 |
| Yard Food (Stockton) Ltd | Hospitality | 2025 |
| Yarm Property Group Ltd | Construction | 2024 |
| Yarmad Ltd | Construction | 2025 |
| Yarmouth Medical Services Limited | Health & social care | 2026 |
| Yashlyn Ltd | Wholesale & retail | 2026 |
| Yasin's Security Ltd | Other services | 2022 |
| Yechuri Constructions Ltd | Construction | 2026 |
| Yelloww Limited | Transport & logistics | 2026 |
| Yeoman Property Services Ltd. | Real estate | 2017 |
| YFG Trading Ltd | Wholesale & retail | 2019 |
| YH & RH Limited | Other services | 2020 |
| YI HAO Limited | Hospitality | 2018 |
| Yiyang 888 Ltd | Hospitality | 2022 |
| YK Boro Ltd | Hospitality | 2025 |
| YK Education Consultants Ltd | Education | 2024 |
| Yoghurt POT Limited | Information & communication | 2019 |
| Yonas TE Limited | Health & social care | 2023 |
| YOR Care Residential Services Limited | Health & social care | 2025 |
| Yorebridge Holdings Limited | Manufacturing | 2019 |
| Yorkshire Bangladeshi Buddhist Association UK Ltd | Health & social care | 2024 |
| Yorkshire Business Solution (NE) Ltd | Professional & scientific | 2026 |
| Yorkshire Construct Ltd | Construction | 2025 |
| Yorkshire Dairy Services Limited | Manufacturing | 2024 |
| Yorkshire Returnees Company Limited | Health & social care | 2015 |
| Yorkshire Rose Construction Limited | Construction | 2021 |
| Yorkshire Sourcing Solution Ltd | Real estate | 2025 |
| Yorkshire Tech Hub Ltd | Wholesale & retail | 2024 |
| Yorkshire Velvet Limited | Real estate | 2019 |
| Youcan,Jellystone CIC | Other services | 2024 |
| Young@Heart 2021 CIC | Administrative & support | 2021 |
| Youngs Property Developments Limited | Real estate | 2020 |
| Your Care Hub Ltd | Health & social care | 2025 |
| Your CV Pro Ltd | Administrative & support | 2024 |
| Your House Cleaning Ltd | Administrative & support | 2020 |
| Your Maximum Ltd | Professional & scientific | 2021 |
| Your Protection People Limited | Financial services | 2024 |
| Your Scaffolding Specialists Limited | Construction | 2025 |
| Your Storage NE Limited | Other services | 2026 |
| Your Will Made Easy (Ywme) Limited | Professional & scientific | 2016 |
| Yours Carz M Ltd | Wholesale & retail | 2026 |
| Yudkajdlfa Limited | Construction | 2026 |
| Yugan Limited | Wholesale & retail | 2021 |
| Yyang YII Ltd | Wholesale & retail | 2024 |
| Z Cars (North East) Limited | Transport & logistics | 2020 |
| Z&B Delights Ltd | Wholesale & retail | 2026 |
| Z&R Property Management Ltd | Real estate | 2024 |
| ZA Sons Enterprises Ltd | Wholesale & retail | 2025 |
| Zachtm Limited | Construction | 2026 |
| Zahco Limited | Health & social care | 2024 |
| Zaheer Akhtar Ltd | Transport & logistics | 2024 |
| ZAK International Limited | Wholesale & retail | 2025 |
| Zalatimo Goods Ltd | Hospitality | 2022 |
| Zaman Pharma Care Ltd | Wholesale & retail | 2023 |
| Zamanecom Ltd | Wholesale & retail | 2025 |
| Zan's NE Ltd | Wholesale & retail | 2024 |
| Zara Fashion Ltd | Wholesale & retail | 2025 |
| Zara K Designs Ltd | Professional & scientific | 2024 |
| Zarak Marketing Ltd | Wholesale & retail | 2024 |
| Zarbaf Trading Ltd | Wholesale & retail | 2024 |
| Zariv Limited | Professional & scientific | 2009 |
| Zaroo Services Ltd | Wholesale & retail | 2023 |
| Zarwa Craft Limited | Wholesale & retail | 2015 |
| Zayan&Co Ltd | Wholesale & retail | 2026 |
| ZCM Ltd | Construction | 2025 |
| Zebra Dental Ltd | Extraterritorial | 2014 |
| ZED Estates & Facilities Ltd | Administrative & support | 2024 |
| Zelvixforge Ltd | Information & communication | 2025 |
| Zemx Ltd | Financial services | 2024 |
| ZEN Developments (NW) Limited | Construction | 2015 |
| Zenbid Property Limited | Real estate | 2025 |
| Zenith Aluminium Ltd | Construction | 2026 |
| Zenith Beauty World UK Ltd | Wholesale & retail | 2025 |
| Zenith Collections Ltd | Wholesale & retail | 2024 |
| Zesty Bites Pizzeria and Desserts Ltd | Hospitality | 2023 |
| Zeta Optix Ltd | Health & social care | 2023 |
| Zetla Ltd | Professional & scientific | 2023 |
| Zetland Holdings Limited | Administrative & support | 2018 |
| ZGB Logistics Ltd | Transport & logistics | 2023 |
| ZH Financial Services Ltd | Professional & scientific | 2017 |
| ZH Property (NE) Limited | Real estate | 2014 |