D

Llanmorlais, Swansea SA4 3TN

Darlun Cyf

Ffinfa, Ffordd Bangor, Y Felinheli LL56 4JQ

http://www.darlun.tv

Deepdock Limited

Holyhead, Isle of Anglesey, LL654HD

The Carriage House, Brynkinalt Business Centre, Chirk, LL14 5NS

http://www.thedeerinitiative.co.uk/

Deregallera Ltd

Cardiff CF11 05N

https://www.deregallera.com/

Deri Jones and Associated Ltd.

8 Bro Nantcellan, Clarach, Aberystwyth SY23 3PH

https://www.derij.co.uk/

Derwen

Swansea, SA1 5JN

Diamond Centre Wales Ltd

Rhondda Cynon Taff CF72 9FG

 https://www.diamondcentrewales.com/

Digi4u Ltd

3 Waterside Business Park, Lamby Way, Rumney, Cardiff CF3 2ET

 http://www.digi4u.co.uk

Digital Asset Services Ltd (Coincover)

Cardiff CF10 4AZ

https://www.coincover.com/

Do-IT Solutions Ltd

Cardiff Gate Business Park, Cardiff CF238AB

Dr Zigs Extraordinary Bubbles

Vaynol Estate, Bangor LL57 4BP

http://www.drzigs.com

DTR Medical Ltd

DTR Medical, Swansea Enterprise Park, 17 Clarion Cl, Llansamlet, Swansea SA6 8RF

https://dtrmedical.com/

DVLA

Long View Rd, Morriston, Swansea SA6 7JL

http://www.gov.uk

DVSC

Ruthin, LL15 1AF

https://www.dvsc.co.uk/home

Dwr Cymru Cyf-Caerphilly

Pentwyn Rd, Nelson, Treharris, CF46 6LY

http://www.dwrcymru.com

Dwr Cymru Welsh Water- Aberystwyth

Waun Fawr, Aberystwyth SY23 3AP

http://www.dwrcymru.com

Dwr Cymru Welsh Water- Newport

Spooner Cl, Coedkernew, Marshfield, Newport NP10 8FZ

http://www.dwrcymru.com

Dwr Cymru Welsh Water- Treharris 

Pentwyn Rd, Nelson, Treharris CF46 6LY

http://www.dwrcymru.com