| DHB Contract Services Ltd | Professional & scientific | 2005 |
| DHB Psychological Services Ltd | Health & social care | 2024 |
| DHC Repairs Ltd | Wholesale & retail | 2001 |
| DHE Midlands Limited | Construction | 2024 |
| Dhevs Ltd | Wholesale & retail | 2015 |
| DHF Building Developers Ltd | Construction | 2018 |
| DHG Property Developments Limited | Real estate | 2024 |
| DHG Services Limited | Administrative & support | 2015 |
| Dhiendsa Properties Limited | Real estate | 2022 |
| Dhillon Dental Ltd | Manufacturing | 2024 |
| Dhillon Financial Holdings Ltd | Construction | 2024 |
| Dhillon Rental Ltd | Real estate | 2020 |
| Dhindsa Ltd | Other services | 2026 |
| Dhiraj Property Ltd | Real estate | 2024 |
| Dhiren Makhecha Residential Limited | Real estate | 2017 |
| DHM (Nottingham) Ltd | Extraterritorial | 2011 |
| DHO Visions Ltd | Information & communication | 2022 |
| Dhoopsoft Ltd | Information & communication | 2014 |
| Dhow Properties Limited | Real estate | 2026 |
| DHP Digital Ltd | Administrative & support | 2009 |
| DHP Family Live Limited | Arts & recreation | 2019 |
| DHP Family Ltd | Hospitality | 1931 |
| DHR Construction Limited | Construction | 2024 |
| Dhtv Holdings Limited | Real estate | 2025 |
| DIA Developments Limited | Professional & scientific | 2007 |
| Diabolo Limited | Professional & scientific | 2003 |
| Diagnostic Imaging Limited | Wholesale & retail | 2000 |
| Diallo Properties Ltd | Real estate | 2023 |
| DIALOG360 Limited | Wholesale & retail | 2019 |
| Diamond Aesthetic & Laser Systems Ltd | Administrative & support | 2021 |
| Diamond AV Limited | Construction | 2013 |
| Diamond Avenue Holdings Ltd | Administrative & support | 2012 |
| Diamond Care Solutions Ltd | Health & social care | 2019 |
| Diamond Cars Nottingham Ltd | Transport & logistics | 2020 |
| Diamond Cleaning 5ERVICES Ltd | Administrative & support | 2023 |
| Diamond Continuity Solutions Limited | Professional & scientific | 2019 |
| Diamond Dogdiscs Ltd | Manufacturing | 2020 |
| Diamond Financial Solutions Limited | Professional & scientific | 2009 |
| Diamond Flooring UK Group Limited | Construction | 2024 |
| Diamond Flooring UK Limited | Construction | 2007 |
| Diamond Home Care Ltd | Health & social care | 2018 |
| Diamond House Limited | Extraterritorial | 1960 |
| Diamond International Dining Limited | Hospitality | 2017 |
| Diamond Jade Limited | Information & communication | 2025 |
| Diamond Network Group Ltd | Construction | 2020 |
| Diamond Plaice Limited | Transport & logistics | 1996 |
| Diamond Press Nottingham Ltd | Professional & scientific | 2024 |
| Diamond PRIME195 Ltd | Manufacturing | 2025 |
| Diamond Print Limited | Manufacturing | 1995 |
| Diamond Property Network Limited | Education | 2022 |
| Diamond Reality Limited | Extraterritorial | 2001 |
| Diamond Scaffolding Services (Nottm) Ltd | Construction | 1988 |
| Diamond Star Visuals Ltd | Information & communication | 2025 |
| Diamond Transport Audits and Compliance (UK) Ltd | Transport & logistics | 2026 |
| Diamond Window Systems Limited | Manufacturing | 2002 |
| Diamonds Cosmetics Limited | Wholesale & retail | 2013 |
| Diana Asset Management Ltd | Real estate | 2022 |
| Diana Digital Ltd | Information & communication | 2024 |
| Diana Enterprises Ltd | Real estate | 2019 |
| Diana Fontes Costa Limited | Health & social care | 2016 |
| Diana Homes Limited | Real estate | 2020 |
| Dianahbroady Ltd | Administrative & support | 2017 |
| DIANIKDERM76 Limited | Health & social care | 2026 |
| Dica Capital Limited | Real estate | 2025 |
| Dica Holdings Limited | Real estate | 2026 |
| Dica Properties Limited | Real estate | 2024 |
| Dice and Balls CIC | Wholesale & retail | 2023 |
| Dice Consulting Engineers Ltd | Construction | 2017 |
| Dice CUP Cafe Ltd | Hospitality | 2026 |
| Diceg Investments Limited | Financial services | 2022 |
| Dick Lexic Limited | Wholesale & retail | 1999 |
| Dickens Manor Management Company Limited | Households | 2015 |
| Dickinson & Rabbitte Limited | Professional & scientific | 2003 |
| DID 2014 Ltd | Transport & logistics | 2014 |
| Diddu Communications Ltd | Education | 2017 |
| Diddyland (Nottingham) Limited | Wholesale & retail | 2006 |
| Didem Coffee N Cream Limited | Hospitality | 2019 |
| Didsbury Meddev Limited | Information & communication | 2015 |
| Didymus Investments Limited | Real estate | 2021 |
| DIE & Trim Tool Ancilliaries Ltd | Wholesale & retail | 2010 |
| Dieftech Ltd | Information & communication | 2018 |
| Dietl Education Centre UK Limited | Education | 2019 |
| Difal Ltd | Information & communication | 2022 |
| Diffract Ltd | Arts & recreation | 2023 |
| Dig-It Driveways Limited | Construction | 2021 |
| Digby & Digby Limited | Construction | 2004 |
| Diggs Studio Ltd | Information & communication | 2016 |
| Digia Media Ltd | Other services | 2020 |
| Digicentr Marketing Solutions Limited | Professional & scientific | 2025 |
| Digichhap Ltd | Professional & scientific | 2025 |
| Digiminds Academy Limited | Information & communication | 2024 |
| Digistics Ltd | Transport & logistics | 2024 |
| Digital Camel Ltd | Administrative & support | 2024 |
| Digital Camera Systems Ltd | Information & communication | 2017 |
| Digital Clubhouse Ltd | Professional & scientific | 2025 |
| Digital Dental Laboratory Ltd | Manufacturing | 2024 |
| Digital Eden Publishing Limited | Information & communication | 2013 |
| Digital Fizz Ltd | Professional & scientific | 2021 |
| Digital Illumination Limited | Information & communication | 2010 |
| Digital Insanity Limited | Information & communication | 2004 |