| Yorkshire Paints-Ozchem Limited | Manufacturing | 2005 |
| Yorkshire Renewable Energy Solutions Limited | Construction | 2011 |
| Yorkshire Rose Investments Ltd | Real estate | 2019 |
| Yorkshire Software Solutions Ltd | Information & communication | 2023 |
| Yorkshire Sports & Prestige Limited | Wholesale & retail | 2014 |
| Yorkshire Wholesale Flooring Ltd | Wholesale & retail | 2022 |
| YOU and ME Publications Limited | Information & communication | 2022 |
| Your Care Team Ltd. | Health & social care | 2017 |
| Your Fitness (Dewsbury) Limited | Arts & recreation | 2012 |
| Your Local(Dewsbury)Store Ltd | Wholesale & retail | 2025 |
| YP Dent Ltd | Health & social care | 2023 |
| YP Forecourt Services Limited | Wholesale & retail | 2002 |
| YSM Accounts Ltd | Professional & scientific | 2022 |
| YSM19 Ltd | Health & social care | 2019 |
| YSR Surveying Ltd | Professional & scientific | 2025 |
| YT Developments Ltd | Construction | 2017 |
| Yusha Performance Car Parts Ltd | Wholesale & retail | 2024 |
| Yusuf Khan Ltd | Transport & logistics | 2026 |
| Z TAI Limited | Health & social care | 2018 |
| Z.S Novasleep Ltd | Wholesale & retail | 2026 |
| Z854 Ltd | Real estate | 2024 |
| ZA Clearbridge Ltd | Administrative & support | 2025 |
| Zaeducation Ltd | Education | 2024 |
| Zafar Industries Ltd | Other services | 2021 |
| Zaheer Patel Optom Ltd | Health & social care | 2021 |
| Zaheer Retail Ltd | Wholesale & retail | 2025 |
| Zahu Assessors Ltd | Professional & scientific | 2025 |
| Zain Specialist Cars Ltd | Wholesale & retail | 2020 |
| ZAK Property Holdings Ltd | Real estate | 2024 |
| ZAK Squared Ltd | Wholesale & retail | 2019 |
| ZAK Transport Solutions Ltd | Transport & logistics | 2021 |
| Zaltric Limited | Information & communication | 2026 |
| ZAM ZAM Takeaway Ravensthorpe Limited | Hospitality | 2024 |
| Zaman Foundation | Other services | 2012 |
| ZAQ Properties Limited | Real estate | 2025 |
| Zardoktor Ltd | Construction | 2026 |
| Zarmentok Ltd | Construction | 2024 |
| Zaryal London Ltd | Wholesale & retail | 2024 |
| Zasher Ltd | Real estate | 2026 |
| Zavi Foods Ltd | Wholesale & retail | 2024 |
| Zayyany Limited | Real estate | 2026 |
| ZED Jump Ltd | Arts & recreation | 2019 |
| ZED Transport Limited | Transport & logistics | 2016 |
| Zeds Therapy Ltd | Health & social care | 2021 |
| ZEE Growth Partners Ltd | Administrative & support | 2026 |
| ZEE Logistics Limited | Transport & logistics | 2023 |
| Zeeshan Builders Ltd | Construction | 2025 |
| Zenith Consulting Group Ltd | Information & communication | 2025 |
| Zenith Dental Limited | Health & social care | 2025 |
| Zenith Developments & Investments Ltd | Real estate | 2024 |
| Zephyr Surgery Ltd | Health & social care | 2021 |
| Zero Slip UK Ltd | Administrative & support | 2015 |
| Zero Trust CIC | Education | 2026 |
| ZEX MGT Ltd | Administrative & support | 2019 |
| Zeyn Optical Ltd | Health & social care | 2021 |
| Zeyy Ltd | Real estate | 2017 |
| ZF Locum Ltd | Health & social care | 2021 |
| Zfkautos Ltd | Wholesale & retail | 2024 |
| ZG Ventures Limited | Real estate | 2019 |
| ZH & HS Investments Ltd | Real estate | 2025 |
| ZH Fabrics Limited | Wholesale & retail | 2026 |
| ZHB Healthcare Ltd | Health & social care | 2013 |
| Zhenz Investments Ltd | Real estate | 2025 |
| Zino Trading Limited | Wholesale & retail | 2018 |
| Zixon Transport Ltd | Administrative & support | 2019 |
| ZK Travels Ltd | Transport & logistics | 2025 |
| ZM Properties BS Ltd | Real estate | 2025 |
| ZMR Ecom Ltd | Wholesale & retail | 2024 |
| Zoyatariq Ltd | Wholesale & retail | 2025 |
| ZR Recovery & Vehicle Transport Ltd | Transport & logistics | 2024 |
| ZRF IT Ltd | Information & communication | 2020 |
| ZRH Ltd | Transport & logistics | 2025 |
| ZSM Enterprises Limited | Health & social care | 2023 |
| ZSV Legal Ltd | Professional & scientific | 2023 |
| ZTS Haulage Ltd | Transport & logistics | 2025 |
| Zufa & Co Ltd | Health & social care | 2014 |
| Zuni Online Store Ltd | Wholesale & retail | 2023 |