| Y&J Consulting Ltd | Professional & scientific | 2014 |
| Y&S (Notts) Ltd | Wholesale & retail | 2020 |
| Y.G Architectural Design Consultants Ltd | Professional & scientific | 2019 |
| Y.J Construction Ltd | Construction | 2025 |
| Y.M.E. Limited | Construction | 2008 |
| Y.V Properties (PVT) Ltd | Real estate | 2025 |
| Y3A Tech Solutions Limited | Information & communication | 2025 |
| YA ARK Ltd | Wholesale & retail | 2024 |
| YA Locum Services Ltd | Professional & scientific | 2022 |
| YAA Clothing Limited | Wholesale & retail | 2014 |
| Yaar Records Ltd | Extraterritorial | 2007 |
| Yacoub Locum Limited | Health & social care | 2007 |
| Yadacorp Limited | Professional & scientific | 2023 |
| Yadgar Halal Express Ltd | Wholesale & retail | 2025 |
| Yahluma Limited | Health & social care | 2017 |
| Yahvi Investments Ltd | Professional & scientific | 2016 |
| Yahya Management Ltd | Professional & scientific | 2014 |
| Yahyafoods Ltd | Wholesale & retail | 2026 |
| Yakarim Limited | Health & social care | 2008 |
| Yakimachi Limited | Hospitality | 2024 |
| Yakub Master Limited | Administrative & support | 2015 |
| Yakub Taxis Ltd | Transport & logistics | 2019 |
| Yalida Tech Solutions Limited | Information & communication | 2020 |
| Yallaeat Ltd | Hospitality | 2024 |
| Yalnzz Investment Holdings Ltd | Financial services | 2026 |
| YAM and EGG Ltd | Information & communication | 2025 |
| Yamin Heating & Plumbing Ltd | Construction | 2022 |
| Yana Jewellers Ltd | Wholesale & retail | 2025 |
| Yanga Ltd | Administrative & support | 2017 |
| YAR Engineers Ltd | Construction | 2023 |
| Yarafleet Ltd | Transport & logistics | 2025 |
| Yard Group Limited | Hospitality | 2020 |
| Yardi Services Ltd | Information & communication | 2025 |
| Yarieenu Ltd | Wholesale & retail | 2025 |
| Yarite Ltd | Arts & recreation | 2025 |
| Yarn Elixir Ltd | Wholesale & retail | 2025 |
| Yarn Solutions Limited | Wholesale & retail | 2010 |
| Yarn Source Ltd | Wholesale & retail | 2023 |
| Yarnbrook Ltd | Hospitality | 2015 |
| Yarsa Limited | Hospitality | 2018 |
| YAS Builders Ltd | Construction | 2012 |
| Yasamal Ltd | Wholesale & retail | 2018 |
| Yaseen Halal Meat and Poultry Ltd | Wholesale & retail | 2023 |
| Yash Properties Ltd | Real estate | 2022 |
| Yash Technologies Ltd | Information & communication | 2012 |
| Yashar Azimi Ltd | Health & social care | 2025 |
| Yashar Halal Centre Ltd | Wholesale & retail | 2017 |
| Yasiin Ltd | Wholesale & retail | 2022 |
| Yasmin Mini Marrket Ltd | Wholesale & retail | 2019 |
| Yassin Medical Ltd | Health & social care | 2014 |
| Yasyas Ltd | Wholesale & retail | 2017 |
| Yateley Commerce Ltd | Transport & logistics | 2015 |
| Yawe Limited | Health & social care | 2017 |
| Yawthorpe Ltd | Transport & logistics | 2015 |
| YBS Distribution Limited | Administrative & support | 2020 |
| YBY Limited | Financial services | 2020 |
| Ydbs Investments Limited | Real estate | 2023 |
| Ydbs Limited | Financial services | 2012 |
| YDC Consulting Limited | Other services | 2023 |
| Ydra Driving Services Limited | Transport & logistics | 2013 |
| Ydtheatres Limited | Health & social care | 2022 |
| YDY Limited | Professional & scientific | 2025 |
| Yeaton Logistics Ltd | Transport & logistics | 2014 |
| Yeco Integrated Construction Ltd | Construction | 2026 |
| Yedusa Ltd | Professional & scientific | 2025 |
| Yelford Recommended Ltd | Transport & logistics | 2015 |
| Yello Telecom Ltd | Information & communication | 1999 |
| Yellow Assets Abbey Limited | Real estate | 2024 |
| Yellow Assets Holdings Limited | Financial services | 2025 |
| Yellow Assets Ltd | Financial services | 2017 |
| Yellow Chronicles Ltd | Information & communication | 2024 |
| Yellow Glove Productions Ltd | Information & communication | 2025 |
| Yellow Lighthouse Ltd | Real estate | 2021 |
| Yellow Shield Limited | Wholesale & retail | 2006 |
| Yellowshed Limited | Hospitality | 2016 |
| Yelnif Ltd | Administrative & support | 2025 |
| Yeme Regen Limited | Information & communication | 2020 |
| Yeme Tech Limited | Information & communication | 2020 |
| Yeoman Electrical Services Ltd | Construction | 2025 |
| Yeoman Homes & Developments Ltd | Real estate | 2024 |
| Yeoman Yarns Limited | Wholesale & retail | 2017 |
| Yeomans Bar, Saddle UP & SIP Ltd | Hospitality | 2026 |
| YES ! Car Ltd | Wholesale & retail | 2016 |
| YES Auto Garage Limited | Wholesale & retail | 2026 |
| YES GAS & Electric Services Ltd | Manufacturing | 2019 |
| YES Renovations Limited | Construction | 2014 |
| YES! Associates Limited | Professional & scientific | 2011 |
| Yesb Limited | Professional & scientific | 2024 |
| Yescapes Holidays Ltd | Administrative & support | 2025 |
| Yescapes Tours Limited | Administrative & support | 2025 |
| Yesmar Restaurants Ltd | Hospitality | 2000 |
| Yestaxi Limited | Transport & logistics | 2024 |
| Yesterware Sweets Ltd | Wholesale & retail | 2020 |
| YET Enterprises Limited | Information & communication | 2024 |
| Yeti Holdings Limited | Real estate | 2018 |
| Yeti International Ltd | Real estate | 2026 |
| Yeti Marketing Ltd | Professional & scientific | 2024 |
| YEW Limited | Construction | 2017 |
| YEW Tree Farm Guesthouse Ltd | Construction | 2021 |
| Yewtree Properties Limited | Real estate | 1999 |