| Diamond Build 1 Ltd | Construction | 2026 |
| Diamond Car Wash (Bolton) Ltd | Other services | 2019 |
| Diamond Care 4 U Limited | Administrative & support | 2015 |
| Diamond Carpets & Flooring Ltd | Wholesale & retail | 2024 |
| Diamond CUT Refurbs Ltd | Manufacturing | 2017 |
| Diamond Express Travel Ltd | Transport & logistics | 2025 |
| Diamond Galore Ltd | Wholesale & retail | 2021 |
| Diamond Harvest Produce Ltd | Wholesale & retail | 2026 |
| Diamond Healthcare (NW) Limited | Wholesale & retail | 2006 |
| Diamond Holdings NW Limited | Real estate | 2016 |
| Diamond Nails & Beauty Ltd | Other services | 2024 |
| Diamond Nails (Bolton) Ltd | Other services | 2013 |
| Diamond Silk Ltd | Wholesale & retail | 2025 |
| Diamond Strategy Limited | Professional & scientific | 2025 |
| Diamond Surgery Ltd | Health & social care | 2021 |
| Diamond Tyres & Auto Bodywork Limited | Wholesale & retail | 2025 |
| Diamonds D&G Limited | Other services | 2016 |
| Diamonds Driving Services Limited | Transport & logistics | 2025 |
| Diamondscope Limited | Real estate | 2019 |
| Diane Pilling Business Consultancy Limited | Professional & scientific | 2003 |
| Dianemo Services Ltd | Information & communication | 2025 |
| Dickinson Brooks Property Ltd | Real estate | 2025 |
| Dickinson Ward Ltd | Construction | 2025 |
| Dickinson West Development Ltd. | Construction | 2016 |
| Dickinsons Courier Service Limited | Transport & logistics | 2021 |
| Dida Transport Ltd | Transport & logistics | 2018 |
| Diddikicks Barnsley & Doncaster LLP | | 2021 |
| Diddikicks Blackpool & Lancaster LLP | | 2021 |
| Diddikicks Bradford LLP | | 2019 |
| Diddikicks Bury LLP | | 2019 |
| Diddikicks Castleford & East Leeds LLP | | 2020 |
| Diddikicks Cheshire Central LLP | | 2020 |
| Diddikicks Cheshire LLP | | 2019 |
| Diddikicks Chester & Ellesmere Port LLP | | 2020 |
| Diddikicks Darlington & Stockton LLP | | 2021 |
| Diddikicks Formby & Southport LLP | | 2020 |
| Diddikicks Gateshead & Durham LLP | | 2020 |
| Diddikicks Group Services Ltd | Wholesale & retail | 2017 |
| Diddikicks Halifax LLP | | 2021 |
| Diddikicks Harrogate & York LLP | | 2020 |
| Diddikicks Hartlepool & Middlesbrough LLP | | 2020 |
| Diddikicks Huddersfield & District LLP | | 2020 |
| Diddikicks Leeds West LLP | | 2021 |
| Diddikicks Leyland & Chorley LLP | | 2021 |
| Diddikicks Liverpool Central LLP | | 2020 |
| Diddikicks Liverpool East LLP | | 2020 |
| Diddikicks Liverpool South LLP | | 2020 |
| Diddikicks MCC LLP | | 2019 |
| Diddikicks Newcastle East LLP | | 2021 |
| Diddikicks North Cheshire LLP | | 2020 |
| Diddikicks North Liverpool LLP | | 2020 |
| Diddikicks Nottingham & Mansfield LLP | | 2021 |
| Diddikicks Oldham and Rochdale LLP | | 2020 |
| Diddikicks Ormskirk & Skelmersdale LLP | | 2020 |
| Diddikicks Preston LLP | | 2020 |
| Diddikicks SE MCR LLP | | 2020 |
| Diddikicks Shef LLP | | 2021 |
| Diddikicks South Manchester LLP | | 2019 |
| Diddikicks ST Helens LLP | | 2020 |
| Diddikicks Sunderland & South Shields LLP | | 2020 |
| Diddikicks Wakefield & District LLP | | 2020 |
| Diddikicks Warrington Central LLP | | 2019 |
| Diddikicks Warrington West & Halton LLP | | 2020 |
| Diddikicks Wigan LLP | | 2019 |
| Didsbury Foods Ltd | Hospitality | 2026 |
| Diem Sports Ltd | Professional & scientific | 2023 |
| Differentiate Coaching & Marketing Limited | Professional & scientific | 2023 |
| Difindo Limited | Wholesale & retail | 2022 |
| DIG Down Ltd | Construction | 2024 |
| Digger International Ltd | Manufacturing | 2017 |
| Digicomm 360 Ltd | Information & communication | 2014 |
| Digicrawl Limited | Information & communication | 2023 |
| Digilawyer Ltd | Information & communication | 2023 |
| Digilutions Ltd | Professional & scientific | 2025 |
| Digisale Property Limited | Real estate | 2025 |
| Digisalesolution Limited | Transport & logistics | 2022 |
| Digispace Management Limited | Construction | 2025 |
| Digispace.App Ltd | Information & communication | 2021 |
| Digital Atlas Commerce Limited | Wholesale & retail | 2026 |
| Digital Bolton Limited | Information & communication | 2015 |
| Digital Bumpkin Ltd | Information & communication | 2024 |
| Digital Classic NE Ltd | Information & communication | 2022 |
| Digital Clouduk Ltd | Information & communication | 2019 |
| Digital Corax Limited | Information & communication | 2017 |
| Digital Flow Marketing Limited | Professional & scientific | 2024 |
| Digital Future Limited | Information & communication | 2025 |
| Digital Health Nexus Ltd | Health & social care | 2024 |
| Digital Imperial Ltd | Information & communication | 2013 |
| Digital Itech Limited | Other services | 2022 |
| Digital MRU Limited | Information & communication | 2022 |
| Digital Spirit Games Ltd | Information & communication | 2022 |
| Digital Tailoring Limited | Information & communication | 2018 |
| Digital Tax & Finance Ltd | Professional & scientific | 2025 |
| Digital-Ads(Uk) Ltd | Professional & scientific | 2016 |
| Digitalcube Limited | Information & communication | 2017 |
| Digitalker Ltd | Information & communication | 2025 |
| Digitally Manufactured Limited | Information & communication | 2014 |
| Digitalogic Ltd | Professional & scientific | 2023 |
| Digitustechics Ltd | Information & communication | 2025 |
| Dignity Grave Care Ltd | Administrative & support | 2025 |