| Yasmina's Kitchen Ltd | Hospitality | 2026 |
| Yasminas Group Ltd | Hospitality | 2025 |
| Yates & Nicklin Limited | Professional & scientific | 2000 |
| YB Miles Ltd | Education | 2021 |
| Yccl Wealth Management Ltd | Financial services | 2023 |
| YD Pannu Limited | Real estate | 2025 |
| YE Fast Food Ltd | Hospitality | 2021 |
| YE Union Ltd | Wholesale & retail | 2023 |
| Ye-Bands Ltd | Wholesale & retail | 2026 |
| Yellow Boxes Management Ltd | Professional & scientific | 2022 |
| Yellow Brick Digital Ltd | Information & communication | 2013 |
| Yellow HAT Property Ltd | Real estate | 2023 |
| Yellow Tiger Design and Marketing Limited | Professional & scientific | 2006 |
| Yempak Trade Co Ltd | Wholesale & retail | 2025 |
| YES Chef Jesmond Limited | Hospitality | 2022 |
| Yewtree Precast Ltd | Construction | 2023 |
| Yezclean Ltd | Administrative & support | 2025 |
| Yieldstream Limited | Information & communication | 2026 |
| Yinsncl Ltd | Construction | 2024 |
| Yistar Ltd | Real estate | 2025 |
| YJ Strategy Ltd | Professional & scientific | 2025 |
| YJK Properties Ltd | Real estate | 2026 |
| YK Commercial Ltd | Real estate | 2023 |
| YK Richardson Property Solutions Limited | Real estate | 2021 |
| Ykem Ltd | Hospitality | 2020 |
| YM Building Services Ltd | Construction | 2025 |
| YMS Foods Stores Ltd | Wholesale & retail | 2026 |
| Yoga Hens Ltd | Other services | 2017 |
| Yoga Life Studios Ltd | Health & social care | 2026 |
| Yoga X Life Retreats Ltd | Education | 2022 |
| Yoga X Life Studios Ltd | Arts & recreation | 2022 |
| Yoga X Life Trainings Ltd | Education | 2023 |
| Yohlar Limited | Information & communication | 2023 |
| Yojoy Ltd | Wholesale & retail | 2026 |
| Yolo (Newcastle) Limited | Hospitality | 2016 |
| Yolo (Ponteland) Limited | Hospitality | 2010 |
| Yong Shun 999 Limited | Real estate | 2023 |
| York Engineering Services Limited | Construction | 2013 |
| York Incorporation Ltd | Other services | 2018 |
| York Number 1 Limited | Real estate | 2017 |
| York Place Leisure Ltd | Hospitality | 2019 |
| York Therapy Clinic Ltd | Health & social care | 2025 |
| Yorkshire Bank Home Loans Limited | Financial services | 1984 |
| Yorkshire Electricity Distribution Limited | Extraterritorial | 2010 |
| Yorkshire Electricity Group PLC | Financial services | 1989 |
| Yorkshire Orthodontics Limited | Health & social care | 2015 |
| Yorkshire Orthodontics Properties Ltd | Real estate | 2022 |
| Yorkshire Power Group Limited | Financial services | 1996 |
| Yorkshire Powergrid Limited | Extraterritorial | 2011 |
| Yoro Limited | Wholesale & retail | 2024 |
| Yosa Transport Ltd | Transport & logistics | 2025 |
| YOU Meow Ltd | Wholesale & retail | 2023 |
| YOU RE Home Ltd | Construction | 2007 |
| Youens Clothing Limited | Wholesale & retail | 2025 |
| Young Industries Ltd | Other services | 2011 |
| Young Roofing Limited | Construction | 2023 |
| Youngman Property Ltd | Real estate | 2018 |
| Your Amazing Content Ltd | Information & communication | 2018 |
| Your Business Matters Limited | Wholesale & retail | 2011 |
| Your Care First Limited | Health & social care | 2005 |
| Your Easy LET Ltd | Real estate | 2019 |
| Your Fight Site Ltd | Information & communication | 2017 |
| Your First Quote Limited | Financial services | 2004 |
| Your Garden North East Ltd | Wholesale & retail | 2025 |
| Your Home Real Estate Limited | Real estate | 2017 |
| Your Homes Newcastle Limited | Real estate | 2004 |
| Your House Solutions Ltd | Real estate | 2026 |
| Your House Solutions NE Ltd | Real estate | 2026 |
| Your Local Gardening Tree Service Ltd | Construction | 2025 |
| Your Local Pages Limited | Manufacturing | 2022 |
| Your New Horizon for Educational Services Limited | Education | 2014 |
| Your New Slimming Clinic Limited | Other services | 2020 |
| Your Pace Your Race Limited | Manufacturing | 2025 |
| Your Personal Tax Expert Limited | Professional & scientific | 2025 |
| Your Print Specialist Holdings Ltd | Wholesale & retail | 2026 |
| Your Print Specialists Ltd | Wholesale & retail | 2009 |
| Your Property Construction Ltd | Construction | 2026 |
| Your Property Development Ltd | Real estate | 2020 |
| Your Property Place Ltd | Real estate | 2018 |
| Your Property Tax Expert Limited | Professional & scientific | 2024 |
| Your Renewables Ltd | Construction | 2024 |
| Your Search Partner Ltd | Administrative & support | 2020 |
| Your Space Bathrooms Ltd | Wholesale & retail | 2026 |
| Your-Move.Co.Uk Limited | Real estate | 1984 |
| Yours Best Choice Limited | Wholesale & retail | 2023 |
| Youstrong Limited | Construction | 2023 |
| Yoyo Noodle Newcastle Ltd | Hospitality | 2023 |
| YPL23 Ltd | Hospitality | 2024 |
| YR Property Builders Ltd | Construction | 2025 |
| YRM Accountancy Ltd | Professional & scientific | 2016 |
| YSO Creative Ltd | Information & communication | 2026 |
| YU Cook Holdings Ltd | Manufacturing | 2018 |
| YU Estates Ltd | Real estate | 2021 |
| Yufu Group Ltd | Manufacturing | 2025 |
| Yuka-M Excipients Solutions Limited | Manufacturing | 2018 |
| Yummie Yogurts Ltd | Wholesale & retail | 2024 |
| Yummies Take Away Ltd | Hospitality | 2024 |
| Yummies Takeaway (NE) Ltd | Hospitality | 2018 |
| Yumyaba Limited | Hospitality | 2025 |
| Yuva Solutions Limited | Information & communication | 2020 |