| Yorkshire PIE and PEA Wholesale Company Limited | Wholesale & retail | 2011 |
| Yorkshire Pine Factory Limited | Manufacturing | 2015 |
| Yorkshire Plated Cars Ltd | Transport & logistics | 2019 |
| Yorkshire Renovations Ltd Limited | | 2016 |
| Yorkshire Rose Property Ltd | Real estate | 2019 |
| Yorkshire Scaffolding Solutions Ltd | Construction | 2025 |
| Yorkshire Shoulder Ltd | Health & social care | 2019 |
| Yorkshire Stainless Specialist Limited | Manufacturing | 2007 |
| Yorkshire Timber and Builders Merchants Limited | Wholesale & retail | 2006 |
| Yorkshire Timber and Building Supplies Limited | Extraterritorial | 2010 |
| Yorkshire Timber Merchants Limited | Extraterritorial | 2010 |
| Yorkshire Trade Vans Ltd | Wholesale & retail | 2019 |
| Yorkshire Tyre Services Ltd | Wholesale & retail | 2019 |
| Yorkshire Washing Machine Hire Limited | Administrative & support | 2018 |
| Yorkshire Waste & Recycling Ltd | Water & waste | 2023 |
| Yorkshire's Finest Homes Limited | Real estate | 2022 |
| Yorky OIL Tool Grinders Ltd | Manufacturing | 2017 |
| Yoshio Clothing Limited | Wholesale & retail | 2019 |
| YOU ARE Here North Limited | Construction | 2026 |
| Youngsoft Limited | Health & social care | 2014 |
| Your Building Works Ltd | Construction | 2020 |
| Your Day Group Ltd | Arts & recreation | 2020 |
| Your Energy Services Ltd | Construction | 2021 |
| Your Homes 2 Rent Ltd | Real estate | 2019 |
| Your Law 4U Limited | Professional & scientific | 2010 |
| Your New Car Limited | Wholesale & retail | 2010 |
| Your New Home Ltd | Construction | 2023 |
| Your Night OFF Ltd | Other services | 2006 |
| Your Options Ltd | Professional & scientific | 2019 |
| Your Payroll Matters Ltd | Professional & scientific | 2022 |
| Your Properties (Belper) Ltd | Construction | 2026 |
| Your Properties Ltd | Financial services | 2019 |
| Your Reload Ltd | Health & social care | 2023 |
| YRS Roofing Solutions Ltd | Construction | 2026 |
| YSS Building & Property Maintenance Ltd | Manufacturing | 2022 |
| YSS Mechanical & Electrical Limited | Construction | 2017 |
| Yummiest Restaurants Ltd | Hospitality | 2019 |
| Yumusak Capital (Siddal) Limited | Construction | 2025 |
| Yumusak Capital Ltd | Financial services | 2020 |
| Yvonne Halling Consultancy Limited | Other services | 2015 |
| Yvonne Mcphail Medical Services Limited | Health & social care | 2017 |
| Yzktrade Ltd | Wholesale & retail | 2025 |
| Z ALI Care Ltd | Health & social care | 2024 |
| Z Car Sales Ltd | Wholesale & retail | 2023 |
| Z H Legal Consultants Limited | Professional & scientific | 2016 |
| Z Property Management Limited | Real estate | 1993 |
| Z-K-Y Electrical Services Ltd | Construction | 2022 |
| Z5 Property Ltd | Real estate | 2023 |
| Z6 Property Ltd | Real estate | 2025 |
| ZA (UK) Limited | Education | 2008 |
| ZA Retail Ltd | Wholesale & retail | 2026 |
| Zahab Construction Ltd | Construction | 2025 |
| Zahraa Locuming Ltd | Professional & scientific | 2026 |
| Zain Electrics (Halifax) Limited | Manufacturing | 2024 |
| Zaino Market Ltd | Wholesale & retail | 2026 |
| Zakir Ltd | Information & communication | 2016 |
| Zamann Estates Ltd | Real estate | 2025 |
| Zamann Properties Ltd | Real estate | 2019 |
| Zamann Specialist Cars Ltd | Wholesale & retail | 2012 |
| Zamo Holdings Ltd | Real estate | 2026 |
| ZAR Tech Solutions Limited | Information & communication | 2019 |
| Zarava Ltd | Real estate | 2018 |
| Zarch Interior Ltd | Construction | 2021 |
| Zasamiba Shopmart Limited | Wholesale & retail | 2020 |
| Zatar Holdings Ltd | Real estate | 2018 |
| Zaviyar Carpets Ltd | Other services | 2025 |
| ZB Legal Limited | Professional & scientific | 2020 |
| Zebra Cleaning Limited | Administrative & support | 2010 |
| ZEE Motor TEC Limited | Wholesale & retail | 2018 |
| ZEN Mini Market Ltd | Wholesale & retail | 2022 |
| ZEN Pilates Ltd | Arts & recreation | 2025 |
| Zengech Ltd | Information & communication | 2025 |
| Zenith WM Limited | Financial services | 2010 |
| Zenithcove Limited | Real estate | 1996 |
| Zenithing Innovations Ltd | Wholesale & retail | 2025 |
| Zenon Padel Ltd | Wholesale & retail | 2025 |
| Zenta Real Estate Limited | Real estate | 2023 |
| Zentora Holdings Ltd | Wholesale & retail | 2026 |
| Zetland Design Limited | Information & communication | 2010 |
| Zeus Land and Architecture Ltd | Professional & scientific | 2021 |
| ZG Healthcare Ltd | Health & social care | 2023 |
| ZH Acuity Limited | Health & social care | 2026 |
| Zhagaram Tamizhpalli Ltd | Education | 2024 |
| ZHH Trading Ltd | Other services | 2024 |
| Ziggy's Schoolwear & Embroidery Ltd | Wholesale & retail | 2024 |
| Zigori Enterprises PVT Ltd | Transport & logistics | 2018 |
| Zion Digital Limited | Information & communication | 2014 |
| Zivardi Limited | Manufacturing | 2009 |
| Ziyaan R Ltd | Real estate | 2025 |
| ZJ Healthcare Services Limited | Health & social care | 2025 |
| ZK Business Consultancy Ltd | Professional & scientific | 2022 |
| Zkdk Group Ltd | Real estate | 2024 |
| ZM Commercials Ltd | Real estate | 2025 |
| Zoes Hair Lounge Limited | Other services | 2021 |
| Zoheab Ltd | Administrative & support | 2018 |
| Zoiya Visioncare Ltd | Health & social care | 2018 |
| ZS Motor Sales Ltd | Wholesale & retail | 2024 |
| ZS Properties Ltd | Real estate | 2017 |
| ZSQ Ltd | Wholesale & retail | 2024 |
| ZTD Ltd | Health & social care | 2023 |