| Yale Investment Holdings Limited | Financial services | 2018 |
| YAN1 Limited | Wholesale & retail | 2021 |
| Yanbue Aljazira for Trade and Contracting Ltd | Construction | 2025 |
| Yarm Retreats Ltd | Real estate | 2024 |
| Yarntex Two Limited | Hospitality | 1986 |
| Yarwood & Co Fine Jewellery Limited | Manufacturing | 2024 |
| Yarwoods of Yorkshire Limited | Wholesale & retail | 2012 |
| YAS (Enterprises) Limited | Real estate | 2003 |
| YASM1N Limited | Wholesale & retail | 2023 |
| Yathrib International Group Ltd | Wholesale & retail | 2024 |
| Yaxley-Gray Limited | Information & communication | 2025 |
| Yazza Ltd | Other services | 2010 |
| YDA Projects Limited | Construction | 2021 |
| Yeadon Finance Concepts Limited | Professional & scientific | 2001 |
| Yellowstone Environmental Solutions Ltd | Manufacturing | 2007 |
| Yellowstone Security Ltd | Information & communication | 2023 |
| YES Careers Ltd | Administrative & support | 2009 |
| YES Infotech Limited | Wholesale & retail | 2002 |
| Yeti Prints Ltd | Wholesale & retail | 2020 |
| Yfyfc Bars Limited | Hospitality | 2007 |
| YHX Limited | Health & social care | 2020 |
| YM Oriental Spa Ltd | Other services | 2017 |
| YO1 Group Limited | Professional & scientific | 2002 |
| YO1 Homes Limited | Real estate | 2002 |
| Yodelcare Limited | Real estate | 1984 |
| Yoga Guru Limited | Other services | 2024 |
| Yogdev Ltd | Wholesale & retail | 2026 |
| Yokoriginals Ltd | Wholesale & retail | 2024 |
| Yorbus Consulting Ltd | Professional & scientific | 2022 |
| York House Harrogate Limited | Households | 2024 |
| York House Property Management Limited | Households | 2014 |
| York Place 21 Management Company Limited | Households | 2021 |
| York Place Mews (Maintenance) Limited | Households | 1985 |
| York Ready MIX Ltd | Manufacturing | 2026 |
| York Web Solutions Limited | Information & communication | 2025 |
| Yorkfields Limited | Real estate | 1996 |
| Yorkies Fish and Chips Limited | Hospitality | 2025 |
| Yorkport Limited | Wholesale & retail | 2020 |
| Yorkshire Access Training Limited | Construction | 2016 |
| Yorkshire Agricultural Society | Other services | 1982 |
| Yorkshire Alarms and Security Services Limited | Extraterritorial | 1994 |
| Yorkshire Alarms Limited | Extraterritorial | 1994 |
| Yorkshire Appliance Repair & Care Ltd | Other services | 2025 |
| Yorkshire Appliance Repairs Ltd | Other services | 2020 |
| Yorkshire Appliance Spares Ltd | Other services | 2022 |
| Yorkshire Architectural Aluminium Services Ltd | Construction | 2017 |
| Yorkshire Baby Show Ltd | Administrative & support | 2025 |
| Yorkshire Bespoke Renovations Ltd | Construction | 2025 |
| Yorkshire Cancer Research | Health & social care | 1985 |
| Yorkshire Canine Store Ltd | Wholesale & retail | 2023 |
| Yorkshire Capital Partners Limited | Extraterritorial | 2026 |
| Yorkshire Causeway Schools Trust | Education | 2011 |
| Yorkshire Coastliner Limited | Transport & logistics | 1989 |
| Yorkshire Collaborative Academy Trust | Education | 2015 |
| Yorkshire Consulting Engineers Limited | Professional & scientific | 2012 |
| Yorkshire Contracts Limited | Construction | 2025 |
| Yorkshire Corporate Finance Limited | Professional & scientific | 1994 |
| Yorkshire Cured Meat Ltd | Hospitality | 2022 |
| Yorkshire Dales Cottages Limited | Real estate | 2017 |
| Yorkshire Dales Rivers Trust | Professional & scientific | 2004 |
| Yorkshire Design and Build Ltd | Professional & scientific | 2024 |
| Yorkshire Design Associates LLP | | 2011 |
| Yorkshire Electrical Solutions Ltd | Construction | 2021 |
| Yorkshire Energy Ltd | Information & communication | 2018 |
| Yorkshire Energy Systems Ltd | Construction | 2012 |
| Yorkshire Equestrian Limited | Extraterritorial | 2026 |
| Yorkshire Event Centre Limited | Wholesale & retail | 1991 |
| Yorkshire Event Labour Limited | Administrative & support | 2026 |
| Yorkshire Exhibition Solutions Ltd | Other services | 2018 |
| Yorkshire Gift Hampers Ltd | Wholesale & retail | 2025 |
| Yorkshire Group Physio Limited | Health & social care | 2024 |
| Yorkshire Health Network CIC | Health & social care | 2014 |
| Yorkshire Healthcare Limited | Health & social care | 2023 |
| Yorkshire Heat Pumps Limited | Construction | 2016 |
| Yorkshire Heritage Limited | Extraterritorial | 2012 |
| Yorkshire Indies Ltd | Wholesale & retail | 2026 |
| Yorkshire Inns 'N' Taverns Limited | Hospitality | 2014 |
| Yorkshire Inns Limited | Hospitality | 2001 |
| Yorkshire Investment Partners Limited | Extraterritorial | 2026 |
| Yorkshire Land Co. Limited | Construction | 2023 |
| Yorkshire Land Limited | Construction | 1987 |
| Yorkshire Land Owners Limited | Extraterritorial | 2026 |
| Yorkshire Loft Ladders Ltd | Construction | 2023 |
| Yorkshire Medical Logistics Limited | Health & social care | 2010 |
| Yorkshire Metropolitan Properties Limited | Extraterritorial | 1982 |
| Yorkshire Microbiology Consultancy Ltd | Professional & scientific | 2019 |
| Yorkshire Pens Limited | Wholesale & retail | 2012 |
| Yorkshire Performing Arts Limited | Education | 2011 |
| Yorkshire Radiators Ltd | Information & communication | 2018 |
| Yorkshire Removals and Storage Ltd | Transport & logistics | 2023 |
| Yorkshire Renewable Energy Limited | Construction | 2023 |
| Yorkshire Retreats Limited | Real estate | 2021 |
| Yorkshire Rose Geology Ltd | Professional & scientific | 2021 |
| Yorkshire Securities Limited | Construction | 1992 |
| Yorkshire Send Consultancy Ltd | Education | 2025 |
| Yorkshire Short Lets Limited | Real estate | 2024 |
| Yorkshire Speciality Foods Ltd | Manufacturing | 2022 |
| Yorkshire Stone Co. (Bradford) Limited | Financial services | 1955 |
| Yorkshire Swimming Pools Limited | Construction | 2024 |
| Yorkshire Tennis & Padel Limited | Arts & recreation | 2022 |