| YA Building Contractors Limited | | | workplace safety or health violation | 2019 | UK-HSE | £0 |
| Y. Clayton Building Contractors Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Xylem Water Solutions UK Ltd | Xylem | miscellaneous services | workplace safety or health violation | 2019 | UK-HSE | £0 |
| Xyfil Ltd | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| XWR LIMITED | | | workplace safety or health violation | 2019 | UK-HSE | £0 |
| XWR LIMITED | | | workplace safety or health violation | 2019 | UK-HSE | £0 |
| XWR LIMITED | | | workplace safety or health violation | 2016 | UK-HSE | £0 |
| XWR LIMITED | | | workplace safety or health violation | 2023 | UK-HSE | £0 |
| XWR LIMITED | | | workplace safety or health violation | 2023 | UK-HSE | £0 |
| XWR LIMITED | | | workplace safety or health violation | 2023 | UK-HSE | £0 |
| XWR LIMITED | | | workplace safety or health violation | 2023 | UK-HSE | £0 |
| XUM Enterprise Ltd | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| Xtrend Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| Xtrend Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| Xtrend Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| Xtrend Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| Xtreme Funfair Limited | | | workplace safety or health violation | 2017 | UK-HSENI | £0 |
| Xtreme Breakers Limited | | | workplace safety or health violation | 2023 | UK-HSE | £0 |
| Xtratherm UK Ltd | | | workplace safety or health violation | 2020 | UK-HSE | £0 |
| Xtrac Ltd | | | workplace safety or health violation | 2021 | UK-HSE | £100,639 |
| Xtra-Space Construction Ltd | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Xtra-Space Construction Ltd | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| XTP International Limited | | | childcare and educational services violation | 2018 | UK-OFSTED | £0 |
| XTENDNW LTD | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| XTENDNW LTD | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| XTENDNW LTD | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| XPS Foam Limited | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| XPS Foam Limited | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| XPRESS MOT and Car Repairs Ltd | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| XPRESS MOT and Car Repairs Ltd | | | workplace safety or health violation | 2023 | UK-HSE | £0 |
| XPO Transport Solutions UK Limited | XPO Logistics | freight and logistics | workplace safety or health violation | 2017 | UK-HSE | £0 |
| XPO Supply Chain UK Limited | GXO Logistics | freight and logistics | workplace safety or health violation | 2019 | UK-HSE | £0 |
| XPO Supply Chain UK Limited | GXO Logistics | freight and logistics | workplace safety or health violation | 2018 | UK-HSE | £0 |
| XPO Supply Chain UK Limited | GXO Logistics | freight and logistics | workplace safety or health violation | 2017 | UK-HSE | £0 |
| XPO Supply Chain UK Limited | GXO Logistics | freight and logistics | workplace safety or health violation | 2016 | UK-HSE | £0 |
| XPO Supply Chain UK Limited | GXO Logistics | freight and logistics | workplace safety or health violation | 2016 | UK-HSE | £0 |
| XPand Logistics Ltd | | | nuclear safety violation | 2019 | UK-ONR | £0 |
| XL Engineering Trading Limited | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| XJ Restoration Ltd | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| XJ Restoration Ltd | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Xinye Decoration Company Limited | | | workplace safety or health violation | 2019 | UK-HSE | £0 |
| Xin Lei Ltd | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| XIAOZHUFEIFEI 3C DIGITAL STORE | | | product safety violation | 2022 | UK-OPSS | £0 |
| XIAOYAOWAZI | | | product safety violation | 2022 | UK-OPSS | £0 |
| XIAOXIZHENCHANGANLUFURONGSANXIANG2HAO | | | product safety violation | 2022 | UK-OPSS | £0 |
| XIAOERJIUSHIGUAN | | | product safety violation | 2022 | UK-OPSS | £0 |
| XIAMEN SHANXI IMPORT AND EXPORT CO., LTD t/a LILI House Lighting Store | | | product safety violation | 2022 | UK-OPSS | £0 |
| XI AN BAI HENG BIN SHANG MAO YOU XIAN GONG S | | | product safety violation | 2021 | UK-OPSS | £0 |
| xhforever | | | product safety violation | 2021 | UK-OPSS | £0 |
| XEEJU572223 t/a ado Ladies’ Clothing Store | | | product safety violation | 2022 | UK-OPSS | £0 |
| XE.Building Limited | | | workplace safety or health violation | 2023 | UK-HSE | £0 |
| XE.Building Limited | | | workplace safety or health violation | 2023 | UK-HSE | £0 |
| XDP.CO.UK Limited | | | workplace safety or health violation | 2021 | UK-HSE | £0 |
| XDP.CO.UK Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| XDP.CO.UK Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| Xcell Plastics Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| XCEL Aerospace Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| XCEL Aerospace Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| XCEL Aerospace Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| XCEL Aerospace Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| XCEL Aerospace Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| Xander Doors Limited | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| Xander Doors Limited | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| X8 Properties Limited | | | workplace safety or health violation | 2021 | UK-HSE | £0 |
| X-Streams Developments Ltd | | | workplace safety or health violation | 2023 | UK-HSE | £0 |
| X-Streams Developments Ltd | | | workplace safety or health violation | 2023 | UK-HSE | £0 |
| X-innovations Technologies Ltd | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| X-Hill Karwash | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| X Pak Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| X Pak Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| X Pak Limited | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| X L Building Solutions Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| X 2 Connect Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| X 2 Connect Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| X 2 Connect Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| X 2 Connect Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| WZ Packaging Limited | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| Wyvern Sheet Metal & Fabrications Ltd | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| Wyvern Sheet Metal & Fabrications Ltd | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| Wyvern Bovver Limited | | | workplace safety or health violation | 2020 | UK-HSE | £0 |
| Wyvern Bovver Limited | | | workplace safety or health violation | 2020 | UK-HSE | £0 |
| Wyresdale Concrete Products Limited | | | workplace safety or health violation | 2019 | UK-HSE | £0 |
| Wyre Forest Recycling Services Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| Wyre Forest Recycling Services Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| Wyre Forest Recycling Services Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| Wynveen International B.V. | | | workplace safety or health violation | 2022 | UK-HSE | £60,596 |
| Wynstones | | | childcare and educational services violation | 2019 | UK-OFSTED | £0 |
| Wynne Aviation Services Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| Wyncliffe Ltd | | | workplace safety or health violation | 2021 | UK-HSE | £0 |
| Wyman-Gordon Limited | Berkshire Hathaway | diversified | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Wyman-Gordon Limited | Berkshire Hathaway | diversified | workplace safety or health violation | 2010 | UK-HSE | £22,678 |
| Wyman-Gordon Limited | Berkshire Hathaway | diversified | workplace safety or health violation | 2023 | UK-HSE | £225,000 |
| Wyllie Recycling Limited | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| Wyllie Recycling Limited | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| Wyllie Recycling Limited | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| Wylie-Redman (Moulds) Limited | | | workplace safety or health violation | 2021 | UK-HSE | £0 |
| Wylie-Redman (Moulds) Limited | | | workplace safety or health violation | 2021 | UK-HSE | £0 |
| Wylie Stone Masonry | | | workplace safety or health violation | 2019 | UK-HSENI | £0 |
| Wyles Roofing Ltd | | | workplace safety or health violation | 2022 | UK-HSE | £35,276 |
| Wyldecrest Parks (Management) Ltd | | | workplace safety or health violation | 2021 | UK-HSE | £0 |
| Wyken Tools Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
