| Xfinity Internet Promoters Limited | Information & communication | 2025 |
| XIE XIE Ltd | Wholesale & retail | 2023 |
| XJ Kerr Ltd | Transport & logistics | 2022 |
| XL Associates Ltd | Professional & scientific | 2015 |
| XL Associates UK Ltd | Professional & scientific | 2004 |
| XL Fisheries Chippy Limited | Hospitality | 2024 |
| Xline Clothing Ltd | Wholesale & retail | 2026 |
| XLN Holdings Ltd | Financial services | 2025 |
| Xlnc Real Estate UK Ltd | Real estate | 2025 |
| Xohs Ltd | Construction | 2026 |
| Xolun Limited | Professional & scientific | 2023 |
| Xpert Labz Ltd | Wholesale & retail | 2024 |
| Xpert Logix Ltd | Information & communication | 2026 |
| Xpress Logistics AK Ltd | Transport & logistics | 2019 |
| Xstrategy Limited | Information & communication | 2025 |
| XTR Fleet Services Ltd | Wholesale & retail | 2023 |
| Xtracool Limited | Manufacturing | 2025 |
| Xtrakul Limited | Information & communication | 2019 |
| Xtreme Cars Ltd | Administrative & support | 2024 |
| Xtreme Hire Ltd | Wholesale & retail | 2024 |
| XTS Executive Travel Service Limited | Transport & logistics | 2016 |
| Xuvaestus Ltd | Transport & logistics | 2021 |
| Xworx Couriers Ltd | Transport & logistics | 2025 |
| Y C Designs Limited | Information & communication | 2014 |
| Y F Auto Mechanics Limited | Wholesale & retail | 2024 |
| Y J Brothers Ltd | Transport & logistics | 2025 |
| Y.A.K.S. Investments Limited | Real estate | 2025 |
| YA Hayyu Traders Ltd | Wholesale & retail | 2026 |
| Yaara Car Sales Ltd | Other services | 2021 |
| Yacht Club Holdings Limited | Financial services | 2025 |
| Yadsin Limited | Information & communication | 2024 |
| Yahya Holdings Ltd | Financial services | 2026 |
| Yahya Khan Ltd | Wholesale & retail | 2023 |
| Yama Healthcare Group Ltd | Health & social care | 2025 |
| Yani Autos Ltd | Wholesale & retail | 2022 |
| Yara C&C Ltd | Wholesale & retail | 2024 |
| Yara Consulting Ltd | Professional & scientific | 2022 |
| Yashasvi Healthcare PVT. Ltd | Health & social care | 2023 |
| Yashwi Consultancy Ltd | Professional & scientific | 2024 |
| Yasminka Limited | Hospitality | 2024 |
| Yatab Grace Enterprises Ltd | Extraterritorial | 2024 |
| Yatros Renovation Ltd | Construction | 2023 |
| Yaya Pizza Ltd | Hospitality | 2025 |
| Yazmed Ltd | Health & social care | 2019 |
| Yazprop Limited | Real estate | 2022 |
| Yekeen Tutors Limited | Education | 2025 |
| Yella Propella Ltd | Professional & scientific | 2024 |
| Yellow LAB Dog Productions Ltd | Information & communication | 2019 |
| YES Green Eco Ltd | Construction | 2021 |
| YES I DO Roofing and Building Limited | Construction | 2025 |
| Yester Home Limited | Wholesale & retail | 2011 |
| Yeva Care Ltd | Health & social care | 2023 |
| YEW Tree (Public House) Limited | Hospitality | 2017 |
| Ygva Holdings Ltd | Financial services | 2025 |
| YHU Ltd | Wholesale & retail | 2026 |
| Yieldmatch Limited | Information & communication | 1992 |
| Yikaalo BTL Property Mangement Ltd | Real estate | 2020 |
| YJS Group Ltd | Households | 2024 |
| YK Logistics Ltd | Transport & logistics | 2026 |
| YL Connect Limited | Hospitality | 2021 |
| Ymca Black Country Group | Hospitality | 2000 |
| Ymca Black Country Social Enterprises Limited | Extraterritorial | 1997 |
| Ymca Wolverhampton | Hospitality | 1995 |
| Ymsk Limited | Health & social care | 2025 |
| YNG Cptn Sound Ltd | Administrative & support | 2024 |
| YNG Mentoring Services Ltd | Education | 2023 |
| Ynys Holdings Ltd | Financial services | 2022 |
| YO Services Ltd | Construction | 2022 |
| YO! Mammees Ltd | Hospitality | 2023 |
| Yogesh Business Ltd | Information & communication | 2026 |
| Yogii Limited | Administrative & support | 2026 |
| Yogish Ltd | Other services | 2025 |
| Yolo Media NK Limited | Information & communication | 2025 |
| Yomyol Ltd | Transport & logistics | 2019 |
| YON Transport Ltd | Transport & logistics | 2021 |
| Yoogo Kart Ltd | Wholesale & retail | 2026 |
| Yorhealth (Complex Care) Limited | Health & social care | 2015 |
| Yorhealth (Supported Living) Limited | Health & social care | 2011 |
| Yorhealth Care Group Limited | Financial services | 2013 |
| Yorhealth Limited | Health & social care | 2026 |
| Yorke Enterprises Limited | Real estate | 2018 |
| Yorkshire Property Investment Fund Limited | Hospitality | 1989 |
| YOU Glow Gurll Ltd | Wholesale & retail | 2024 |
| YOU Mart Ltd | Wholesale & retail | 2023 |
| YOU Patent Limited | Professional & scientific | 2026 |
| YOU Play Soft Play Ltd | Arts & recreation | 2024 |
| Youareunderstood Ltd | Education | 2019 |
| Young and Younger Limited | Wholesale & retail | 2008 |
| Young in Wolverhampton Clubs | Health & social care | 2007 |
| Youngfreshco Limited | Wholesale & retail | 2015 |
| Your Choice Homes Ltd | Real estate | 2025 |
| Your Choice West Midlands Limited | Health & social care | 2010 |
| Your Cleaner Solution Limited | Other services | 2012 |
| Your Daily Essentials Ltd | Wholesale & retail | 2025 |
| Your Daily Foodservice Limited | Wholesale & retail | 2020 |
| Your Digital Hub Limited | Information & communication | 2023 |
| Your Emerald Spa Ltd | Professional & scientific | 2023 |
| Your Exclusive Products Limited | Wholesale & retail | 2024 |
| Your Golden Companion Ltd | Health & social care | 2026 |
| Your Plaice Ltd | Hospitality | 2023 |