| Yemeni's Restaurants and Catering Ltd | Wholesale & retail | 2023 |
| Yemeni'Z Limited | Wholesale & retail | 2023 |
| Yemiah Limited | Health & social care | 2019 |
| Yeoman Homes Limited | Administrative & support | 1975 |
| Yeoman Securities Limited | Construction | 1987 |
| Yeomans Gate Management Company Limited | Real estate | 2013 |
| YES Enterprises Ltd | Wholesale & retail | 2017 |
| YES Fashions Ltd | Wholesale & retail | 2024 |
| YES Gifts Limited | Professional & scientific | 2006 |
| YES Innovations Ltd | Health & social care | 2020 |
| YES Properties(Uk) Ltd. | Real estate | 2019 |
| YES Supplies Group Ltd. | Wholesale & retail | 2016 |
| YES2VENTURES Limited | Other services | 1999 |
| Yesllow Limited | Information & communication | 2025 |
| Yessotche Services Limited | Construction | 2025 |
| Yesterdays Corner Ltd | Wholesale & retail | 2011 |
| Yetty Hairs and Beauty Ltd | Other services | 2023 |
| Yexelmedia Limited | Professional & scientific | 2021 |
| YF Cars Ltd. | Wholesale & retail | 2025 |
| YF Touring Limited | Arts & recreation | 2018 |
| Yflrail Ltd | Construction | 2020 |
| YH Network Technology Limited | Wholesale & retail | 2025 |
| Yhha Ltd | Other services | 2014 |
| YI Limo Hire Limited | Transport & logistics | 2022 |
| Yibo Research & Academic Press PTE. Ltd | Information & communication | 2025 |
| Yigenag Limited | Wholesale & retail | 2025 |
| Yildiz Takeaway Ltd | Hospitality | 2024 |
| Yiller Ltd | Wholesale & retail | 2021 |
| Ying MEI Spa Limited | Health & social care | 2025 |
| Yingyi Ltd | Hospitality | 2026 |
| Yixin Adworks Limited | Professional & scientific | 2025 |
| Yixin Media Ltd | Professional & scientific | 2025 |
| Yixin Trading Ltd | Wholesale & retail | 2025 |
| Yixinqi Limited | Wholesale & retail | 2025 |
| YK Property Investments (Residential) Ltd | Real estate | 2020 |
| YKB Properties Limited | Real estate | 2024 |
| YKY Care Ltd | Health & social care | 2015 |
| YMM Property Support Ltd | Real estate | 2021 |
| Yncmedical Ltd | Health & social care | 2024 |
| Ynysmon Ltd | Hospitality | 2023 |
| YO Noodles Ltd | Hospitality | 2025 |
| YO YO 68 Ltd | Hospitality | 2019 |
| Yo-Omodolapo Ltd | Professional & scientific | 2026 |
| YOB Golf Limited | Wholesale & retail | 2005 |
| YOB Group Holdings Limited | Financial services | 2016 |
| Yoga Solutions Ltd | Arts & recreation | 2008 |
| Yogarox Limited | Arts & recreation | 2016 |
| Yoha Labs Ltd | Information & communication | 2017 |
| Yohuda Ltd | Wholesale & retail | 2021 |
| Yoki Social Table Limited | Hospitality | 2019 |
| Yolo and Yolo Limited | Transport & logistics | 2025 |
| Yologlu Ltd | Hospitality | 2022 |
| Yometh Ltd | Professional & scientific | 2025 |
| Yonca Pizza Limited | Hospitality | 2025 |
| Yondervoid Limited | Wholesale & retail | 2025 |
| Yonol Limited | Wholesale & retail | 2016 |
| Yoomee Digital Limited | Information & communication | 2004 |
| Yoomi Beauty Ltd | Wholesale & retail | 2024 |
| Yorcard Limited | Administrative & support | 2007 |
| Yoriah Limited | Information & communication | 2019 |
| York and Yank Limited | Professional & scientific | 2022 |
| York Concept Limited | Professional & scientific | 2016 |
| York Hogroast (Trading) Ltd | Hospitality | 2015 |
| York Roast Co Group Ltd | Financial services | 2015 |
| York Stone Flags Limited | Construction | 2014 |
| York Street Property Holdings Ltd | Real estate | 2025 |
| Yorke Architecture Ltd | Professional & scientific | 2017 |
| Yorkgate GUN Club (2021) Limited | Arts & recreation | 2021 |
| Yorkmere Limited | Real estate | 1974 |
| Yorkshire & Beyond Construction Ltd | Administrative & support | 2022 |
| Yorkshire & Beyond Developments Ltd | Real estate | 2018 |
| Yorkshire & Beyond Rentals Limited | Real estate | 2022 |
| Yorkshire & Humber Visual Arts Network Limited | Administrative & support | 2016 |
| Yorkshire AI Acquisitions Limited | Financial services | 2025 |
| Yorkshire Airport Transfer Ltd | Transport & logistics | 2024 |
| Yorkshire Airsoft Events Limited | Arts & recreation | 2017 |
| Yorkshire Alloys Ltd. | Administrative & support | 1998 |
| Yorkshire Artspace Society | Arts & recreation | 1995 |
| Yorkshire Asbestos Management Ltd | Professional & scientific | 2015 |
| Yorkshire Bathroom Co. Ltd | Construction | 2025 |
| Yorkshire Bottle Solutions Limited | Administrative & support | 2013 |
| Yorkshire Brickwork Limited | Construction | 2015 |
| Yorkshire Bright Energy Limited | Administrative & support | 2025 |
| Yorkshire Builders Service Ltd | Construction | 2023 |
| Yorkshire Building Civils Surfacing Ltd | Construction | 2025 |
| Yorkshire Building Contractors Ltd | Construction | 2015 |
| Yorkshire Cable Installations Ltd | Construction | 2025 |
| Yorkshire Childrens Services Limited | Health & social care | 2007 |
| Yorkshire Classic Cars (Sheffield) Ltd | Wholesale & retail | 2021 |
| Yorkshire Cleans Limited | Professional & scientific | 2025 |
| Yorkshire Collectables Limited | Wholesale & retail | 2023 |
| Yorkshire Commodities Limited | Water & waste | 2011 |
| Yorkshire Country Homes Ltd | Real estate | 2025 |
| Yorkshire Crewing Company Ltd | Arts & recreation | 2025 |
| Yorkshire Crisp Company Limited | Manufacturing | 2003 |
| Yorkshire Curtain Walling Ltd | Manufacturing | 2026 |
| Yorkshire Decorative Plasterers Limited | Manufacturing | 1985 |
| Yorkshire Decorators Centre Limited | Wholesale & retail | 2011 |
| Yorkshire Diamond Products Limited | Manufacturing | 1988 |
| Yorkshire Education Centre Ltd | Education | 2025 |