| Discorso Speakers Bureau Limited | St. Albans | 2023 |
| Discosphaera Ltd | Brighton | 2011 |
| Discotek Events Limited | Hereford | 2018 |
| Discount Theatre Limited | London | 2008 |
| Discounttheatre.Com Limited | London | 2003 |
| Discover Archery Ltd | Guildford | 2012 |
| Discover Artists - Professional Performance Training Ltd | London | 2025 |
| Discover Brand Creation Limited | Ilford | 2014 |
| Discover Limited | Epsom | 1978 |
| Discover Loch Ness Limited | Inverness | 2006 |
| Discover More CIC | Ventnor | 2025 |
| Discover Playcafe Ltd | Bristol | 2024 |
| Discover the Bluedot Limited | London | 2016 |
| Discover Tree Climbing Ltd | Liverpool | 2018 |
| Discoverations Limited | St. Helens | 2025 |
| Discovered Magazine Ltd | Sheffield | 2015 |
| Discovery Adventure Golf Limited | London | 2013 |
| Discovery Consulting UK Limited | West Molesey | 2006 |
| Discovery Festival Ltd | Newark | 1998 |
| Discovery Health and Wellness Centre Ltd | Dundee | 2023 |
| Discovery Martial Arts Academy Ltd | Plymouth | 2015 |
| Discovery Ministries Ltd | Bridgwater | 2018 |
| Discovery Productions Limited | Borehamwood | 1971 |
| Discovery Saddles Limited | Lichfield | 2025 |
| Discovery Surf Ltd | Kingsbridge | 2016 |
| Discovery Tours and Events Ltd | London | 2004 |
| Discovery Village Ltd | Christchurch | 2023 |
| Discoworks Limited | Belfast | 2024 |
| Discrete Audio Ltd | Camberley | 2017 |
| Discretprofil Ltd | London | 2025 |
| Disctilldawn Limited | London | 2019 |
| Disentangle Projects Ltd | London | 2019 |
| Diseworth Heritage Trust | Derby | 2005 |
| Disffest Community Interest Company | Nr Kirkcudbright | 2023 |
| Disfreq Limited | Derry | 2022 |
| Disgraceful Productions Limited | Chatham | 2025 |
| Disgracelands Limited | Sheffield | 2017 |
| Disguised ZEN Limited | Princes Risborough | 2012 |
| Dishevelled London Recordings Limited | Petersfield | 2019 |
| Disipulus Ltd | London | 2025 |
| Disley Golf Club Limited | Stockport | 1920 |
| Dismantled Media Limited | London | 2011 |
| Displace Yourself Theatre | Bradford | 2017 |
| Displaced Film Ltd | London | 2022 |
| Displaced Media Ltd | London | 2025 |
| Display Dummies Ltd | Tunbridge Wells | 2011 |
| Disrepublic Limited | Fordingbridge | 2008 |
| Disrupta UK Limited | Reading | 2024 |
| Disruptive Theatre Ltd | London | 2026 |
| Disruptor Events Ltd | Farnborough | 2020 |
| Diss & District Bowls Club Limited | Diss | 2016 |
| Diss Golf Club Limited | Diss | 2023 |
| Diss Motorcycle Club Limited | Diss | 1985 |
| Diss Rugby Club Limited | Diss | 2015 |
| Dissemble Limited | Worthing | 2025 |
| Dissonance Holdings Limited | Brentwood | 2015 |
| Distant Horizon Limited | | 1988 |
| Distilled Strength Limited | Banchory | 2025 |
| Distinct Fitness Ltd | Corby | 2024 |
| Distinct Performance Ltd | Stockton-On-Tees | 2019 |
| Distinctive Art Distribution Ltd | Southampton | 2024 |
| Distinctive Destinations Limited | Watford | 2008 |
| Distinctive Events Limited | York | 2022 |
| Distinctive Music Ltd | Slough | 2019 |
| Distinctive Production Ltd | Slough | 2019 |
| Distinctive Tattoos Limited | South Molton | 2017 |
| Distinctly Aware Limited | Manchester | 2016 |
| Distorted Events Limited | Redditch | 2026 |
| Distraction Productions Limited | London | 2018 |
| District 5 Land Yachting Ltd | Ramsgate | 2025 |
| District 6 Music Publishing Limited | London | 2007 |
| District Eleven Records Ltd | London | 2025 |
| District Finalist Limited | Canvey Island | 2024 |
| District G Limited | Penrith | 2020 |
| District L Fitness Limited | Penrith | 2018 |
| District L Online Limited | Penrith | 2021 |
| District L Programming Limited | Penrith | 2025 |
| District Wandsworth Fitness Ltd | Swansea | 2018 |
| District.L Limited | Penrith | 2016 |
| Distrikt 12 Management Ltd | London | 2020 |
| DISTRIKT-6 Limited | Hull | 2025 |
| Disturbed Lava Limited | Nottingham | 2015 |
| Disturbia Films Ltd | London | 2025 |
| Disturbing Sports Limited | London | 2019 |
| Ditchling Museum of Art + Craft | Hassocks | 2008 |
| Ditto Music Label Services Limited | Liverpool | 2018 |
| Ditto Theatre Company Limited | Nottingham | 2016 |
| DITTO247GROUP Ltd | London | 2021 |
| Ditton Heritage Centre Limited | Aylesford | 2003 |
| Ditton Squash Club Limited | Thames Ditton | 2021 |
| Ditzy Pink Ltd | London | 2026 |
| Diva Gaming Ltd | Irton | 2021 |
| Diva Music Festival Limited | Cardiff | 2019 |
| Divalentine Fitness Limited | London | 2025 |
| Divas Dream Limited | Bury St. Edmunds | 2025 |
| Divas of Drag Ltd | London | 2021 |
| Dive Centre Ltd | Teignmouth | 1998 |
| Dive Experience Limited | Chorley | 2012 |
| Dive Leicester Ltd | Leicester | 2012 |
| Dive Manchester Ltd | Manchester | 2017 |