| Xclusive Moddys Limited | Wholesale & retail | 2025 |
| XD Deliveries Ltd | Wholesale & retail | 2025 |
| Xelnor Ltd | Wholesale & retail | 2019 |
| Xeniza Holdings Limited | Financial services | 2021 |
| Xenon Electronics Ltd | Information & communication | 2012 |
| Xerzia Ltd | Wholesale & retail | 2026 |
| Xetex Limited | Financial services | 2024 |
| XGI Ltd | Professional & scientific | 2025 |
| XI LAI Deng Limited | Hospitality | 2025 |
| XI Project Management Ltd | Professional & scientific | 2025 |
| XI Properties Ltd | Real estate | 2023 |
| Xiii Properties Ltd | Real estate | 2025 |
| Xiix Limited | Professional & scientific | 2021 |
| Xillion Limited | Manufacturing | 2020 |
| Xinion Holdings Limited | Financial services | 2021 |
| Xinion Limited | Information & communication | 2013 |
| XL Tooling Ltd | Professional & scientific | 2022 |
| XMD Property Ltd | Real estate | 2020 |
| Xonal Ltd | Wholesale & retail | 2024 |
| Xprz Ltd | Wholesale & retail | 2026 |
| XR Property Holdings Ltd | Real estate | 2012 |
| Xune Ltd | Construction | 2015 |
| Xyield Labs Ltd | Information & communication | 2021 |
| Xyra Mart Ltd | Wholesale & retail | 2025 |
| Xzhjrr Ltd | Financial services | 2025 |
| Y Pharma Ltd | Health & social care | 2022 |
| Y&Z Trading Ltd | Wholesale & retail | 2025 |
| Yaka-Online Ltd | Wholesale & retail | 2023 |
| Yara Store Ltd | Wholesale & retail | 2020 |
| Yardhouse Properties Ltd | Real estate | 2026 |
| Yarm Pizza Ltd | Hospitality | 2026 |
| Yarn Bloom Ltd | Wholesale & retail | 2026 |
| Yasbin Support Ltd | Administrative & support | 2018 |
| Yasin Trade Ltd | Wholesale & retail | 2024 |
| Yasip Limited | Wholesale & retail | 2025 |
| YBA Consultancy Ltd | Financial services | 2018 |
| YBZ Holdings Ltd | Real estate | 2024 |
| Ycna Ltd | Wholesale & retail | 2022 |
| YCP (Construction) Limited | Construction | 2018 |
| YD Holdings Ltd | Real estate | 2023 |
| Yechisol Limited | Manufacturing | 2026 |
| Yellow Bear Coffee Ltd | Hospitality | 2025 |
| YES Clinical Negligence Limited | Extraterritorial | 2011 |
| YES Personal Injury Limited | Extraterritorial | 2011 |
| YEW Tree Management (Farnley Tyas) Limited | Households | 2024 |
| YFWA167NJ Limited | Construction | 2020 |
| YGH Group Ltd | Administrative & support | 2018 |
| YGS Academy Ltd | Arts & recreation | 2022 |
| Yhmg Holdings Ltd | Financial services | 2022 |
| YHS Medicals Ltd | Health & social care | 2023 |
| YI Ping Limited | Hospitality | 2018 |
| Yibp UK Limited | Professional & scientific | 2011 |
| Yiontech Ltd | Information & communication | 2025 |
| Yisrael Ltd | Wholesale & retail | 2024 |
| Yizitrek Properties Limited | Real estate | 2024 |
| YK Group Dropship Ltd | Construction | 2025 |
| YK Nest Ltd | Wholesale & retail | 2025 |
| Ykhfm Ltd | Wholesale & retail | 2025 |
| YL Flooring Huddersfield Limited | Wholesale & retail | 2026 |
| YLS Property Ltd | Real estate | 2025 |
| YM Locums Ltd | Professional & scientific | 2016 |
| YMC Holdings Ltd | Hospitality | 2024 |
| YN Services Yorkshire Ltd | Health & social care | 2022 |
| YNA Consultancy Limited | Professional & scientific | 2023 |
| YNB Group Ltd | Transport & logistics | 2026 |
| Yonik Ltd | Health & social care | 2015 |
| York Paving & Driveways Limited | Construction | 2015 |
| Yorkshire Academic Services Ltd | Education | 2017 |
| Yorkshire Advanced Aesthetics Ltd | Education | 2014 |
| Yorkshire Aquatic Supplies Limited | Wholesale & retail | 2011 |
| Yorkshire Auto Doors Ltd | Construction | 2023 |
| Yorkshire Autocare Services Ltd | Administrative & support | 2025 |
| Yorkshire BBQ Charcoal Ltd | Wholesale & retail | 2026 |
| Yorkshire Biltong Limited | Wholesale & retail | 2021 |
| Yorkshire Cardiology Services Limited | Health & social care | 2012 |
| Yorkshire Carpets Ltd | Wholesale & retail | 2009 |
| Yorkshire Clothing Limited | Wholesale & retail | 2026 |
| Yorkshire Commercial Lending Limited | Financial services | 2026 |
| Yorkshire Community Development CIC | Education | 2022 |
| Yorkshire Concrete Flooring Limited | Construction | 2010 |
| Yorkshire Concrete Floors Ltd | Construction | 2022 |
| Yorkshire Cottage Vacations Limited | Hospitality | 2022 |
| Yorkshire Country Properties (Church Fenton) Limited | Real estate | 2021 |
| Yorkshire Country Properties (Denby Dale) Limited | Real estate | 2017 |
| Yorkshire Country Properties (Emley) Limited | Real estate | 2022 |
| Yorkshire Country Properties (Grange Moor 2) Limited | Real estate | 2022 |
| Yorkshire Country Properties (Grange Moor) Limited | Real estate | 2021 |
| Yorkshire Country Properties (Honley) Limited | Real estate | 2018 |
| Yorkshire Country Properties (Netherthong) Limited | Real estate | 2017 |
| Yorkshire Country Properties (Shepley Phase 1) Limited | Real estate | 2020 |
| Yorkshire Country Properties (Shepley) Limited | Construction | 2014 |
| Yorkshire Country Properties (Skelmanthorpe) Limited | Real estate | 2017 |
| Yorkshire Country Properties Holdings Limited | Real estate | 2021 |
| Yorkshire Country Properties Limited | Real estate | 2017 |
| Yorkshire Craft Butchery Ltd | Wholesale & retail | 2023 |
| Yorkshire Creative Property Solutions Ltd | Real estate | 2021 |
| Yorkshire Dama Cheese Limited | Manufacturing | 2015 |
| Yorkshire Decs Ltd | Construction | 2019 |
| Yorkshire Develop Ltd | Construction | 2018 |
| Yorkshire Distribution Limited | Transport & logistics | 2019 |