| World Wide Promotions Limited | Arts & recreation | 2022 |
| Worthington Project Solutions Ltd | Professional & scientific | 2025 |
| WOW! Kids Limited | Health & social care | 2012 |
| Wright Directory Ltd | Wholesale & retail | 2024 |
| Wrigley Renovations Ltd | Construction | 2018 |
| Wundercoat Ltd | Construction | 2022 |
| Xecutors Ltd | Information & communication | 2024 |
| Xeedevelopers Limited | Information & communication | 2023 |
| XL Property Investment Ltd | Real estate | 2023 |
| Xpertzz Limited | Administrative & support | 2025 |
| Xsellize Ltd | Information & communication | 2020 |
| Xwame Group Ltd | Information & communication | 2017 |
| Y & L Couriers Ltd | Construction | 2022 |
| Y Property Group Ltd | Real estate | 2023 |
| YA Aqsa Tours Limited | Administrative & support | 2024 |
| Yates Ardern Limited | Professional & scientific | 2010 |
| Yawar Ltd | Wholesale & retail | 2025 |
| YC and Sons Ltd | Wholesale & retail | 2025 |
| Yellow Eagle Limited | Information & communication | 2019 |
| Yellow Panther Digital Ltd | Information & communication | 2020 |
| Yellow Panther Holdings Limited | Financial services | 2023 |
| Yellow Panther Ltd | Information & communication | 2024 |
| Yindee Properties Ltd | Real estate | 2021 |
| Yoganic Retreats Limited | Arts & recreation | 2019 |
| Yominx Ltd | Health & social care | 2013 |
| York Corporation UK Ltd | Financial services | 2022 |
| Yorkshire Technical Services Limited | Professional & scientific | 2017 |
| Young and Co (Property Consultants) Limited | Real estate | 2009 |
| Young Creative Limited | Administrative & support | 2011 |
| Your Local Mini Store Ltd | Wholesale & retail | 2023 |
| Your Next BED (Ashton-Under-Lyne) Limited | Wholesale & retail | 2019 |
| Your Property Centre Ltd | Real estate | 2026 |
| Yourvision Healthcare Ltd | Health & social care | 2024 |
| Youtoopia Studios Ltd | Information & communication | 2025 |
| Yummy Portugal Ltd | Wholesale & retail | 2023 |
| Z&D Food Service Limited | Wholesale & retail | 2023 |
| ZA Supplies Ltd | Wholesale & retail | 2026 |
| Zaag Holdings Ltd | Arts & recreation | 2026 |
| Zacolif Ltd | Information & communication | 2019 |
| Zafar&Sons Transport Ltd | Transport & logistics | 2025 |
| Zam-Ruh Ltd | Wholesale & retail | 2026 |
| Zara SB Ltd | Wholesale & retail | 2025 |
| Zaudiology Ltd | Health & social care | 2025 |
| Zclick Media Ltd | Wholesale & retail | 2026 |
| Zelex (UK) Limited | Construction | 1998 |
| Zelex Properties Ltd | Hospitality | 2012 |
| Zember Traders Ltd | Wholesale & retail | 2026 |
| Zentas Consulting Limited | Information & communication | 2023 |
| Zentec Network Solutions Ltd | Information & communication | 2021 |
| Zervia Ltd | Wholesale & retail | 2025 |
| Zest Meetings & Events Ltd | Administrative & support | 2014 |
| Zeven Design Ltd | Professional & scientific | 2019 |
| ZHR Direct Ltd | Wholesale & retail | 2021 |
| Ziric Enterprises Ltd | Wholesale & retail | 2025 |
| Zizi Tech Ltd | Wholesale & retail | 2019 |
| ZK Fast Food Ashton Ltd | Hospitality | 2025 |
| Zohans Productions Ltd | Wholesale & retail | 2025 |
| Zubairnetwork Limited | Wholesale & retail | 2026 |
| Zularix Limited | Wholesale & retail | 2018 |
| Zunrab Ltd | Wholesale & retail | 2025 |
| Zylo AI Ltd | Information & communication | 2025 |
| Zylo Logistics & Transport Ltd | Transport & logistics | 2026 |
| ZZ Motors (MCR) Limited | Wholesale & retail | 2025 |
| [Y-U] Brand Marketing Limited | Professional & scientific | 2023 |