| YO31 Residential Ltd | Real estate | 2026 |
| Yoco Ltd | Construction | 2021 |
| Yomame Limited | Wholesale & retail | 2021 |
| Yonki Ltd | Wholesale & retail | 2022 |
| YOO Kase Ltd | Wholesale & retail | 2016 |
| YOR Drainage Ltd | Professional & scientific | 2025 |
| YOR Pest Commercial Ltd | Administrative & support | 2025 |
| Yorbuild Limited | Construction | 2000 |
| Yorcation Limited | Hospitality | 2022 |
| Yorchild Limited | Health & social care | 2023 |
| Yorcloud Ltd | Information & communication | 2008 |
| Yorcommodate Ltd | Real estate | 2019 |
| Yorden Limited | Health & social care | 2024 |
| Yorenergy Ltd | Information & communication | 2024 |
| Yoreporting Ltd | Health & social care | 2020 |
| Yorfuel Ltd | Energy | 2023 |
| Yorguest Ltd | Hospitality | 2020 |
| Yorhouse Limited | Real estate | 2023 |
| Yorhouse Residential Limited | Real estate | 2025 |
| York (Trenchard) Residents Company Limited | Households | 2002 |
| York Accountancy Ltd | Professional & scientific | 2015 |
| York Accounting and Business Services Limited | Professional & scientific | 2024 |
| York Against Cancer | Health & social care | 2009 |
| York Against Cancer Trading Company Limited | Administrative & support | 1997 |
| York Airbnb Management Ltd | Real estate | 2025 |
| York Anaesthetists Group LLP | | 2018 |
| York and District Citizens Advice Bureau | Health & social care | 2009 |
| York Angels CIC | Other services | 2023 |
| York Aparthotel Limited | Hospitality | 2015 |
| York Appliance Repairs and Sales Limited | Manufacturing | 2015 |
| York Area Quaker Meeting of the Religious Society of Friends (Quakers) in Britain | Other services | 2009 |
| York ATS Limited | Professional & scientific | 2022 |
| York Auction Centre LLP | | 2026 |
| York Automotive Limited | Wholesale & retail | 2026 |
| York Basecamp-Ers Ltd | Manufacturing | 2025 |
| York Bathrooms Ltd | Construction | 2011 |
| York Best Kebab Limited | Hospitality | 2026 |
| York BID Company Limited | Administrative & support | 2016 |
| York Bike Belles Community Interest Company | Other services | 2020 |
| York Bird of Prey Centre Ltd | Arts & recreation | 2011 |
| York Blinds Limited | Wholesale & retail | 2018 |
| York Boilers Ltd | Construction | 2014 |
| York Bouldering Limited | Arts & recreation | 2011 |
| York Box Limited | Manufacturing | 2002 |
| York Brick & Stone Ltd | Wholesale & retail | 2011 |
| York Build & Roofing Ltd | Construction | 2025 |
| York Builder.Com Limited | Construction | 2009 |
| York Building Contractors Limited | Construction | 2019 |
| York Building Services Limited | Real estate | 2014 |
| York Bullion Ltd | Other services | 2024 |
| York Camera Mart Limited | Wholesale & retail | 2000 |
| York Canine Hydro Ltd | Professional & scientific | 2016 |
| York Canine Hydrotherapy Limited | Extraterritorial | 2008 |
| York Car and Commercial Ltd | Wholesale & retail | 2019 |
| York Car Velating Services Ltd | Administrative & support | 2023 |
| York Caravan Park Limited | Hospitality | 2014 |
| York Caravan Storage Ltd | Transport & logistics | 2013 |
| York Carers Centre | Health & social care | 2008 |
| York Cares | Administrative & support | 2005 |
| York Carpentry Limited | Construction | 2026 |
| York Carpet Company Ltd | Wholesale & retail | 2025 |
| York Cat Trail Ltd | Wholesale & retail | 2024 |
| York Catering Co Ltd | Hospitality | 2026 |
| York Cemetery Memorials Ltd | Manufacturing | 2025 |
| York Centre for Voluntary Service | Health & social care | 1951 |
| York Childcare Limited | Education | 1990 |
| York Childcare Support Hub Ltd | Education | 2022 |
| York Chinese Community School Ltd | Education | 2016 |
| York Chinese School Ltd | Education | 2016 |
| York Christmas Trees Ltd | Agriculture & fishing | 2015 |
| York Cider Collective Ltd | Manufacturing | 2024 |
| York Citizens Theatre Trust Limited | Arts & recreation | 1936 |
| York City Church | Other services | 2000 |
| York City Football Club Foundation | Education | 2014 |
| York City Football Club Limited | Arts & recreation | 2003 |
| York City Knights Foundation | Other services | 2005 |
| York City Knights Limited | Arts & recreation | 2002 |
| York City Short Let's Ltd | Real estate | 2026 |
| York City Taxis Ltd | Transport & logistics | 2023 |
| York Civic Trust | Arts & recreation | 1950 |
| York Clean Ltd | Administrative & support | 2017 |
| York Cocoa Works Limited | Manufacturing | 2025 |
| York Coffee Emporium Limited | Wholesale & retail | 2014 |
| York Collective Ltd | Transport & logistics | 2020 |
| York Commercial Limited | Wholesale & retail | 1993 |
| York Community Church | Other services | 2011 |
| York Conservation Trust Limited | Construction | 1945 |
| York Construction Services Ltd | Construction | 2005 |
| York Contractors Ltd | Other services | 2025 |
| York Cottages Limited | Hospitality | 2019 |
| York Courier Services Limited | Transport & logistics | 2019 |
| York Crane Hire Limited | Administrative & support | 2002 |
| York Crystals Ltd | Wholesale & retail | 2025 |
| York Cycleworks Limited | Wholesale & retail | 2013 |
| York Cycling Tours Ltd | Administrative & support | 2014 |
| York Dance Space Ltd | Arts & recreation | 2018 |
| York Dental Implant Centre Limited | Health & social care | 2023 |
| York Development Solutions Limited | Real estate | 2014 |
| York Diamond Builder Ltd. | Construction | 2014 |
| York Digital Marketing Services Ltd | Professional & scientific | 2025 |