| Worktrain Ltd | Education | 2012 |
| Worldwide Travel Specialists Limited | Administrative & support | 2021 |
| Worn and Wonderful Co Ltd | Wholesale & retail | 2025 |
| Worqr Ltd. | Real estate | 2018 |
| Worthdale Limited | Transport & logistics | 1988 |
| Wowmenot Ltd | Wholesale & retail | 2023 |
| WP Book Keeping Services Limited | Professional & scientific | 2008 |
| WP Buzz Ltd | Information & communication | 2020 |
| WP Desk Ltd | Information & communication | 2015 |
| WR Couriers Ltd | Transport & logistics | 2023 |
| WR Safety Services Limited | Public administration | 2018 |
| Wragg Roofing & Building Ltd | Construction | 2014 |
| Wraith Project & Building Consultancy Ltd | Professional & scientific | 2023 |
| Wrecz Ltd | Construction | 2023 |
| Wren Brickwork Limited | Construction | 2023 |
| Wright Building Design Ltd | Professional & scientific | 2020 |
| Wright Sales Consultants Ltd | Professional & scientific | 2025 |
| WRJ Site-Services Ltd | Construction | 2021 |
| WRS South Limited | Wholesale & retail | 2019 |
| WRV Property Ltd | Real estate | 2018 |
| WS Property Investors Ltd | Real estate | 2024 |
| WSB Limited | Health & social care | 2024 |
| WSE Contractors Limited | Construction | 2022 |
| Wunder-Bar Dispensing UK Limited | Wholesale & retail | 1986 |
| Www.Instantprint.Co.Uk Limited | Manufacturing | 2009 |
| Wyndthorpe Developments Limited | Construction | 2002 |
| Wyndthorpe Estates Limited | Administrative & support | 2012 |
| Wyndthorpe Properties Limited | Real estate | 2002 |
| Wyshal Commercial Limited | Real estate | 2018 |
| X-Cel Group Limited | Financial services | 2025 |
| X-Cel Holdings Limited | Financial services | 2019 |
| X-Cel Superturn Ltd | Manufacturing | 1983 |
| X2X Solutions Limited | Information & communication | 2016 |
| Xclusive Eastern Spice Ltd | Hospitality | 2016 |
| Xclusive Holdings Ltd | Professional & scientific | 2019 |
| XD Harmony Wellness Ltd | Health & social care | 2025 |
| Xenia Homes Ltd | Real estate | 2025 |
| Xeniflow Ltd | Information & communication | 2020 |
| Xeros Limited | Professional & scientific | 2006 |
| Xeros Technology Group PLC | Professional & scientific | 2013 |
| XL Tiles Ltd | Transport & logistics | 2021 |
| Xlnt Construction Ltd | Construction | 2024 |
| Xodis Limited | Wholesale & retail | 2018 |
| Xsmash Ltd | Hospitality | 2025 |
| Xyra Trade Ltd | Wholesale & retail | 2025 |
| Y Bar Holmfirth Ltd | Hospitality | 2026 |
| Y Bar Neighbourhood Ltd | Hospitality | 2026 |
| Y L M Key Solutions Limited | Real estate | 2019 |
| Y&H Gadgets Limited | Wholesale & retail | 2025 |
| Y&R Interior Limited | Construction | 2022 |
| Y.D.C.I Electrical Ltd | Construction | 2023 |
| Y.D.C.I Properties Limited | Construction | 2024 |
| Yachtingtime Limited | Administrative & support | 2012 |
| Yakka Staffing Limited | Other services | 2020 |
| Yapka Developers UK Limited | Construction | 2021 |
| Yaplika Ltd | Professional & scientific | 2017 |
| Yardleys Property Group Limited | Financial services | 2026 |
| Yardleys Property Holdings Limited | Real estate | 2022 |
| Yasin Holdings Ltd | Financial services | 2025 |
| YB Property Services Ltd | Real estate | 2018 |
| Yeardley & SON Property Business Ltd | Hospitality | 2025 |
| Yelana Investments Ltd | Real estate | 2026 |
| Yellow Sand Properties Limited | Real estate | 2025 |
| Yellow Truck Ltd | Transport & logistics | 2026 |
| Yellowstones Properties Limited | Real estate | 2023 |
| Yelo POP UP Cafe Ltd | Hospitality | 2026 |
| Yetty Living Ltd | Wholesale & retail | 2025 |
| YFP Yorkshire Ltd | Construction | 2023 |
| YM Logistics Limited | Transport & logistics | 2022 |
| Ymca White Rose | Hospitality | 1906 |
| YMH Driving School Ltd | Education | 2025 |
| YMN Services Limited | Construction | 2025 |
| Yoko Media Ltd | Professional & scientific | 2011 |
| Yoleven Investments Ltd | Financial services | 2025 |
| Yonder IT Limited | Information & communication | 2024 |
| Yootik Ltd. | Information & communication | 2013 |
| Yorke Rigging Solutions.Com Limited | Information & communication | 2020 |
| Yorkshire Accommodation Bureau Ltd | Real estate | 2015 |
| Yorkshire Alliance Group Ltd | Financial services | 2025 |
| Yorkshire Automotive Ltd | Wholesale & retail | 2026 |
| Yorkshire Bespoke Bathrooms Limited | Construction | 2023 |
| Yorkshire Bloodstock Ltd | Agriculture & fishing | 2018 |
| Yorkshire Bloodworks Ltd | Health & social care | 2025 |
| Yorkshire Cafe Group Limited | Hospitality | 2025 |
| Yorkshire Cake House Ltd | Manufacturing | 2019 |
| Yorkshire Ceilings Ltd | Manufacturing | 2026 |
| Yorkshire Chiropractic Clinic Limited | Health & social care | 2017 |
| Yorkshire DRY Lining Co. Ltd | Wholesale & retail | 2007 |
| Yorkshire Electrical Services Ltd | Manufacturing | 2023 |
| Yorkshire Emergency Dentist Ltd | Health & social care | 2025 |
| Yorkshire EYE Clinic Ltd | Wholesale & retail | 2025 |
| Yorkshire Floor Sanding Limited | Construction | 2024 |
| Yorkshire Food Manufacturers (Rotherham) Limited | | 1988 |
| Yorkshire Furniture Repairs Limited | Other services | 2025 |
| Yorkshire Garden Studios Limited | Wholesale & retail | 2016 |
| Yorkshire Health and Safety Advice (Yhsa) Ltd | Professional & scientific | 2012 |
| Yorkshire Information Point Ltd | Professional & scientific | 2019 |
| Yorkshire Learning Centre Limited | Education | 2019 |
| Yorkshire Motor Group Limited | Wholesale & retail | 2026 |
| Yorkshire Paint Supplies Ltd | Wholesale & retail | 2025 |