| D a Davies & Co Limited | Construction | 2008 |
| D and T Engineering Limited | Manufacturing | 2002 |
| D F Storage Limited | Administrative & support | 2024 |
| D L J Properties Limited | Real estate | 2017 |
| D N Gittoes Building Renovation Ltd | Construction | 2007 |
| D T Body Repairs Ltd | Wholesale & retail | 2022 |
| D W Roofing Specialists Ltd | Construction | 2025 |
| D&A Motors (Hereford) Limited | Wholesale & retail | 2012 |
| D'Or Produce Limited | Wholesale & retail | 1990 |
| D. J. Air Conditioning & Refrigeration Ltd | Construction | 2019 |
| D.J. Gardner (Joinery) Limited | Manufacturing | 1975 |
| D2 Technology Limited | Administrative & support | 2010 |
| D3 Crew Ltd | Administrative & support | 2026 |
| D3 Events Ltd | Arts & recreation | 2009 |
| D4 Enterprises Limited | Construction | 2025 |
| DA Architectural Services Limited | Professional & scientific | 2011 |
| Daco Holdings Ltd | Real estate | 2022 |
| Daisy Properties Limited Liability Partnership | | 2004 |
| Dallow’S Ltd | Real estate | 2021 |
| Damage Limited | Professional & scientific | 2004 |
| Dampcure (Hereford) Limited | Construction | 2012 |
| DAN Paddock Building Solutions Ltd | Construction | 2016 |
| Daniel Squire Limited | Agriculture & fishing | 2012 |
| Daniela Sharp Services Limited | Administrative & support | 2025 |
| Dapprima LLP | | 2014 |
| Darian Global Sourcing Limited | Wholesale & retail | 2018 |
| Dark Harbour Studios Ltd | Information & communication | 2024 |
| Dark Sky Systems Limited | Information & communication | 2017 |
| Dars Hereford Ltd | Other services | 2004 |
| Dars Management Co Ltd | Wholesale & retail | 2019 |
| Darwin FOX Holdings Ltd | Real estate | 2021 |
| DAT Design Ltd | Construction | 2011 |
| Data Guard Engineering Limited | Information & communication | 2023 |
| Data Logic International Limited | Professional & scientific | 1971 |
| Data Orchard C.I.C. | Professional & scientific | 2013 |
| Datcravat Limited | Arts & recreation | 2024 |
| Date-A Day Calendars Ltd | Information & communication | 2014 |
| Dave Massey GAS Services Ltd | Construction | 2018 |
| Dave Miles Transport Limited | Transport & logistics | 2008 |
| David Gardner Arboriculture Ltd | Administrative & support | 2016 |
| David Kellett & Partners Limited | Manufacturing | 1993 |
| David Kellett Holdings Limited | Financial services | 2024 |
| David Newton Stunts Ltd | Information & communication | 2011 |
| David Powell Consultancy Limited | Administrative & support | 2019 |
| Davidson Jones Developments Ltd | Construction | 2022 |
| Davies & Daughters Property Ltd | Real estate | 2025 |
| Davies and Daughter Limited | Real estate | 2024 |
| Davies Cabs Limited | Transport & logistics | 2025 |
| Davies Property Ltd | Real estate | 2019 |
| Davies-Hart & Co Ltd | Professional & scientific | 2014 |
| Dawe Transport Company Limited | Transport & logistics | 2025 |
| DAZ Reliable Driver Richardson Limited | Transport & logistics | 2016 |
| Dazclad Roofing Ltd | Construction | 2017 |
| DB Edtech Ltd | Information & communication | 2024 |
| DC Building and Project Management Ltd | Construction | 2024 |
| DC Select Cars Ltd | Wholesale & retail | 2019 |
| DCA Ballistics Limited | Manufacturing | 2024 |
| Dcms Properties Limited | Households | 2019 |
| DCP Property Ltd | Real estate | 2025 |
| Ddpps Limited | Manufacturing | 2012 |
| DE Apexcart Ltd | Wholesale & retail | 2025 |
| DE Lank Quarry Limited | Administrative & support | 2011 |
| DE Souza Retail Ltd | Wholesale & retail | 2022 |
| Dean Concrete & Pumping Ltd | Extraterritorial | 2025 |
| Dean Concrete Pumping Ltd | Construction | 2020 |
| DEB Property Services Ltd | Real estate | 2019 |
| Decland's Developments Ltd | Construction | 2020 |
| Decor Hereford Ltd | Construction | 2022 |
| Defiant Storage (HAY) Ltd | Real estate | 2025 |
| Deftly Handled Limited | Wholesale & retail | 2015 |
| Deja VU Group Ltd | Wholesale & retail | 2020 |
| DEL BOY Investments Ltd | Financial services | 2025 |
| Delaney Mackay Lewis Limited | Real estate | 2015 |
| Delightful Dore Valley LLP | | 2012 |
| Deluxe Nails Spa & Beauty Limited | Other services | 2024 |
| Denco Lubrication Limited | Manufacturing | 2004 |
| Denim Nation (Hereford) Limited | Wholesale & retail | 2013 |
| Dennis L Rayton Ltd | Other services | 2015 |
| Denny Electrical Ltd | Construction | 2022 |
| Denny Property Ltd | Real estate | 2025 |
| Dent Farms Limited | Agriculture & fishing | 1984 |
| Deplantis Ltd | Manufacturing | 2019 |
| Designaventure Limited | Administrative & support | 2003 |
| Designbysoap Ltd | Administrative & support | 2010 |
| Desto Construction Limited | Construction | 2026 |
| Devon Concrete Pumping Limited | Extraterritorial | 2021 |
| Devon FD Limited | Professional & scientific | 2010 |
| Devops NOW Contractors Limited | Information & communication | 2025 |
| Dewsall Court Ltd | Hospitality | 2010 |
| Deyn (Plastics) Limited | Manufacturing | 1973 |
| Dhanoa Properties Ltd | Real estate | 2019 |
| DHD (Leominster) Limited | Professional & scientific | 2015 |
| Dhustone Limited | Administrative & support | 2019 |
| Diamond Property Consultants Ltd | Construction | 2019 |
| Diamond Sales and Lettings (Hereford) Ltd | Real estate | 2017 |
| Didee Childrenswear Ltd | Wholesale & retail | 2022 |
| Digital Globe Holdings Limited | Financial services | 2019 |
| Digital Systems Integration Limited | Information & communication | 2000 |
| Digris Ltd | Information & communication | 2021 |
| Diligent Software Ltd | Information & communication | 2015 |