| Equilibrium Property Holdings Limited | Real estate | 2023 |
| Equilibrium Trading Solutions Ltd | Wholesale & retail | 2026 |
| Equine Star UK Limited | Wholesale & retail | 2023 |
| Equinox Estates MCR Ltd | Real estate | 2015 |
| Equinox Properties Limited | Real estate | 2011 |
| Equinox Property Investment Consulting Ltd | Hospitality | 2023 |
| Equinox Recruitment Limited | Administrative & support | 2025 |
| Equinox Rosenfields Limited | Real estate | 2022 |
| Equinox TC Limited | Professional & scientific | 2014 |
| Equip Links Ltd | Wholesale & retail | 2010 |
| Equip Medmallz Ltd | Wholesale & retail | 2019 |
| Equipit Tele Solutions Limited | Information & communication | 2022 |
| Equitas Capital Partners Limited | Financial services | 2013 |
| Equitas Partners Ltd | Administrative & support | 2021 |
| Equitee Labs Ltd | Professional & scientific | 2025 |
| Equiti Health Limited | Information & communication | 2022 |
| Equitian UK Ltd | Real estate | 2019 |
| Equitique Limited | Households | 2024 |
| Equitix (Howden House) Holdings Limited | Financial services | 2022 |
| Equitix (Howden House) Limited | Administrative & support | 1998 |
| Equitix (Howden House) Midco Limited | Financial services | 2022 |
| Equitix Healthcare (Lancaster) Limited | Real estate | 1998 |
| Equitix Infrastructure Management (2) Limited | Financial services | 2018 |
| Equitus Design Engineering and Innovations Limited | Professional & scientific | 2015 |
| Equitus PHOT1 Global Limited | Wholesale & retail | 2022 |
| Equity Circle Group Ltd | Information & communication | 2025 |
| Equity Orbit Ltd | Health & social care | 2025 |
| Equity Peak Investment Limited | Extraterritorial | 2026 |
| Equity Solutions & Partners LP | | 2003 |
| Equity Solutions Blackburn Limited Partnership | | 2002 |
| Equity Solutions Offshore Properties Limited Partnership | | 2002 |
| Equity Thread Ltd | Professional & scientific | 2025 |
| Equity Training Ltd | Education | 2011 |
| Equitypulse Capital Limited | Financial services | 2025 |
| Equivar Ltd | Other services | 2024 |
| Equiwave Ltd | Real estate | 2024 |
| Equizi Properties Limited | Health & social care | 2012 |
| Equus Motor Corporation Limited | Manufacturing | 2024 |
| ER Porchetta Ltd | Hospitality | 2019 |
| ERA Investments Limited | Real estate | 2001 |
| ERA QMS Ltd | Professional & scientific | 2017 |
| ERA Support Services Limited | Agriculture & fishing | 2020 |
| Eram Business Ltd | Wholesale & retail | 2019 |
| Eram for Export Ltd | Wholesale & retail | 2026 |
| Erasan Limited | Wholesale & retail | 2025 |
| Erased Laser Ltd | Transport & logistics | 2026 |
| Erazink Ltd | Health & social care | 2025 |
| Erba Studio Ltd | Professional & scientific | 2019 |
| Erbelon Limited | Construction | 1981 |
| Erbil Cafe Ltd | Hospitality | 2025 |
| ERC Building Services Ltd | Construction | 2025 |
| Ercho Medical Services Ltd | Health & social care | 2007 |
| Erdenschwester Ltd | Administrative & support | 2024 |
| Eredos Consulting Ltd | Other services | 2013 |
| Eregion Enterprises Ltd | Manufacturing | 2025 |
| Ereke Limited | Real estate | 2020 |
| Eret and Sons Limited | Health & social care | 2019 |
| Eretail Solutions Ltd | Wholesale & retail | 2024 |
| Eretson Services Ltd | Health & social care | 2019 |
| Eretz Hakodesh UK | Other services | 2021 |
| Erez (Manchester) Limited | Real estate | 1963 |
| Erez Investments Ltd | Real estate | 2025 |
| ERF Residential Ltd | Real estate | 2026 |
| Erfe Limited | Construction | 2023 |
| Ergo Services Limited | Information & communication | 2007 |
| Ergon Theatre Ltd | Arts & recreation | 2020 |
| Ergonomics at Work Limited | Extraterritorial | 1998 |
| Erhit Limited | Information & communication | 2011 |
| ERI Building Services Ltd | Construction | 2025 |
| ERI Vape Limited | Wholesale & retail | 2022 |
| Eric & Whensley Ltd | Wholesale & retail | 2017 |
| Eric Care Services Ltd | Health & social care | 2022 |
| Eric Clarke Limited | Real estate | 2018 |
| Eric Clarke Management Limited | Households | 2018 |
| Eric Depolo Afrosport Ltd | Professional & scientific | 2024 |
| Eric Paul Limited | Wholesale & retail | 1988 |
| Eric Smith Associates Limited | Education | 2008 |
| Erica Healthcare Limited | Health & social care | 2019 |
| Erica Pham Art Ltd | Wholesale & retail | 2020 |
| Erica Stacey Ltd | Wholesale & retail | 2019 |
| Erickamz Media Ltd | Professional & scientific | 2025 |
| Ericrea Design Ltd | Professional & scientific | 2025 |
| Eridanos (UK) Ltd | Wholesale & retail | 2018 |
| Erika W UK Ltd | Wholesale & retail | 2019 |
| ERIKSON68LTD Limited | Public administration | 2025 |
| Erims Complete Medicare Ltd | Health & social care | 2020 |
| Erin Associates Limited | Administrative & support | 2013 |
| Erina Services Ltd | Wholesale & retail | 2016 |
| Erith Sidings Freehold Limited | Real estate | 2026 |
| Erkay Holding Ltd | Wholesale & retail | 2025 |
| Erlux Ltd | Real estate | 2025 |
| Erma General Trading and Investment Co Limited | Wholesale & retail | 2024 |
| Ermenegildo Smart Limited | Information & communication | 2026 |
| Ermine Fudge Ltd | Hospitality | 2015 |
| Ernest Construction Ltd | Construction | 2023 |
| Ernest Hawk Limited | Real estate | 2015 |
| Ernest K Manu Ltd | Transport & logistics | 2019 |
| Ernest LEE Holdings Limited | Extraterritorial | 1999 |
| Ernest Umbrella Limited | Administrative & support | 2022 |
| Ernest Wilson's (West Yorkshire) Limited | Real estate | 2013 |