County Index - Mid Glamorgan
- 1001 Security Systems - Mid Glamorgan - Caerphilly
- 1ST Class Services (Chauffeuring) Ltd - Mid Glamorgan - Pontyclun
- 1ST Image - Mid Glamorgan - Pontypridd
- 1ST Image - Mid Glamorgan - Pontypridd
- 1ST Solutions Recruitment Ltd. - Mid Glamorgan - Pontypridd
- 21st Century Discos Ltd - Mid Glamorgan - Bridgend
- 24 Hour Recovery Services - Mid Glamorgan - Bridgend
- 24/7 Courier Network Ltd - Mid Glamorgan - Bridgend
- 3 Blinds Nice - Mid Glamorgan - Pontypridd
- 5 Star Vans - Mid Glamorgan - Hengoed
- A M J Engineering Ltd. - Mid Glamorgan - Mountain Ash
- A N Supplies (Wholesale Electrical Distributors) Ltd - Mid Glamorgan - Bridgend
- A & A Kitchens Ltd. - Mid Glamorgan - Merthyr Tydfil
- A & A Plastics Ltd. - Mid Glamorgan - Bridgend
- A & B Waste - Mid Glamorgan - Caerphilly
- A & K Cash Registers - Mid Glamorgan - Caerphilly
- A B G Fabrications - Mid Glamorgan - Pontypridd
- A B Technical Solutions Ltd. - Mid Glamorgan - Pontypridd
- A G S (Technology) Ltd. - Mid Glamorgan - Caerphilly
- A J Tarmacadam - Mid Glamorgan - Bridgend
- A L & E J Webb & Sons Contractors - Mid Glamorgan - Pontypridd
- A Lea (Jewellers) Ltd - Mid Glamorgan - Aberdare
- A Plus Training and Business Services Ltd - Mid Glamorgan - Caerphilly
- A R Thomas - Mid Glamorgan - Bridgend
- A R W Design & Build - Mid Glamorgan - Bridgend
- A S Wellington Building & Maintenance Ltd. - Mid Glamorgan - Bridgend
- A V P Recycling Ltd - Mid Glamorgan - Caerphilly
- A-Plant Air - Mid Glamorgan - Bridgend
- A1 Survey Ltd - Mid Glamorgan - Caerphilly
- AB Connectors Ltd - Mid Glamorgan - Mountain Ash
- Abba Coaches - Mid Glamorgan - Aberdare
- Abba Scrap Metal Merchants - Mid Glamorgan - Merthyr Tydfil
- Abbatoir Caerphilly, The - Mid Glamorgan - Caerphilly
- Abbey Tile Centre Ltd. - Mid Glamorgan - Bridgend
- Abc Web Design - Mid Glamorgan - Bridgend
- Aberdare Demolition Ltd. - Mid Glamorgan - Aberdare
- Abervalley Slate Salvage - Mid Glamorgan - Caerphilly
- Abril Industrial Waxes Ltd. - Mid Glamorgan - Bridgend
- Abtest Ltd. - Mid Glamorgan - Mountain Ash
- Acacia Joinery Ltd. - Mid Glamorgan - Bridgend
- Academy Surrounds - Mid Glamorgan - Merthyr Tydfil
- Accu-Tech Systems Ltd. - Mid Glamorgan - Caerphilly
- Acd Skips Ltd. - Mid Glamorgan - Bridgend
- Ace Building Contractors - Mid Glamorgan - Merthyr Tydfil
- Acemaster Services Ltd. - Mid Glamorgan - Bridgend
- Acm General Builder Ltd - Mid Glamorgan - Pontypridd
- Acorn Recruitment - Mid Glamorgan - Pontypridd
- Acorn Travel South Wales Ltd - Mid Glamorgan - Treharris
- Acreharrow Ltd. - Mid Glamorgan - Bridgend
- Acw Technology Ltd. - Mid Glamorgan - Tonypandy
- Adata Systems - Mid Glamorgan - Caerphilly
- Adawall Construction Chemicals - Mid Glamorgan - Aberdare
- Adcock Express - Mid Glamorgan - Hengoed
- Addis Germany Ltd - Mid Glamorgan - Bridgend
- Addis Housewares Ltd. - Mid Glamorgan - Bridgend
- Addis Ltd - Mid Glamorgan - Bridgend
- Adecco (Bridgend) - Mid Glamorgan - Bridgend
- Advanced Computing Technology - Mid Glamorgan - Caerphilly
- Advanced Pro Tools Ltd - Mid Glamorgan - Pontypridd
- Advanced Resource Management Ltd - Mid Glamorgan - Mountain Ash
- Advanced Ventilation Solutions Ltd - Mid Glamorgan - Bridgend
- Aerial Supplies - Mid Glamorgan - Hengoed
- Aerospace Wales Forum Ltd - Mid Glamorgan - Bridgend
- AES Tiling - Mid Glamorgan - Aberdare
- Affordable Awnings - Mid Glamorgan - Rhondda
- Agrisense-B C S Ltd. - Mid Glamorgan - Pontypridd
- Aidapt - Mid Glamorgan - Pontyclun
- Air Conditioning Systems (Wales) Ltd - Mid Glamorgan - Caerphilly
- Air Conditioning Systems Wales Ltd - Mid Glamorgan - Caerphilly
- Aircraft Maintenance Support Services Ltd. - Mid Glamorgan - Bridgend
- Aircraft Materials Ltd. - Mid Glamorgan - Bridgend
- Airport Specialists - Mid Glamorgan - Hengoed
- Airtech Ventilation Ltd - Mid Glamorgan - Caerphilly
- Akg Uk Ltd. - Mid Glamorgan - Porth
- Al-Met Ltd - Mid Glamorgan - Pontyclun
- Alan Biggs Kenneth - Mid Glamorgan - Treorchy
- Alan Price & Sons (Bargoed) Ltd. - Mid Glamorgan - Bargoed
- Alan T Brown Ltd - Mid Glamorgan - Bridgend
- Alb Print Services Ltd. - Mid Glamorgan - Caerphilly
- Albert & Flaherty Ltd. - Mid Glamorgan - Merthyr Tydfil
- Albion Flue Systems Ltd - Mid Glamorgan - Pontypridd
- Albion Storage Equipment Ltd - Mid Glamorgan - Pontypridd
- Alert Health & Safety - Mid Glamorgan - Bridgend
- Alexon International Ltd - Mid Glamorgan - Pontypridd
- Alexon International Ltd. - Mid Glamorgan - Pontypridd
- Alexon Sale Shop - Mid Glamorgan - Pontypridd
- Alfred Hawker & Sons Ltd. - Mid Glamorgan - Hengoed
- All Seasons Blinds Ltd. - Mid Glamorgan - Caerphilly
- Allen Esposti Transport - Mid Glamorgan - Pontypridd
- Allevard Springs Ltd. - Mid Glamorgan - Tonypandy
- Alliance Computers - Mid Glamorgan - Bridgend
- Alliance Lofts (Wales) - Mid Glamorgan - Porth
- Alliance Storage - Mid Glamorgan - Pontyclun
- Allied Aerosystems Ltd. - Mid Glamorgan - Pontypridd
- Allied Aspects Ltd - Mid Glamorgan - Pontypridd
- Almesco Ltd. - Mid Glamorgan - Bridgend
- Alpha Steel Buildings Ltd - Mid Glamorgan - Caerphilly
- Alpine Land Surveyors Ltd - Mid Glamorgan - Aberdare
- Alrod Ltd - Mid Glamorgan - Merthyr Tydfil
- Alsamex Products Ltd - Mid Glamorgan - Pontyclun
- ALTech UK Labelling Technologies Ltd - Mid Glamorgan - Bridgend
- Aluminium Windows & Shopfronts Ltd. - Mid Glamorgan - Bridgend
- AMA Vehicle Finance Limted - Mid Glamorgan - Bridgend
- Amaris Granite & Marble Ltd. - Mid Glamorgan - Bridgend
- Amber Battery & Engineering Co. Ltd. - Mid Glamorgan - Pontypridd
- Amber Engineering Ltd - Mid Glamorgan - Hengoed
- Amberwell Engineering Services Ltd - Mid Glamorgan - Bridgend
- Amgen Cymru - Mid Glamorgan - Aberdare
- Amnitec Ltd. - Mid Glamorgan - Merthyr Tydfil
- Andrew Ball Brickwork & Building Contractor - Mid Glamorgan - Caerphilly
- Andrews Sykes Hire Ltd - Mid Glamorgan - Pontypridd
- Angel - Mid Glamorgan - Caerphilly
- Angel Machine Guarding - Mid Glamorgan - Caerphilly
- Angell Engineering & Fabrication - Mid Glamorgan - Pontyclun
- Anthony Jenkins & John Gould - Mid Glamorgan - Bridgend
- Anthony Peter David - Mid Glamorgan - Bridgend
- Anthony R & L - Mid Glamorgan - Bridgend
- Antur I Gymru Newydd Cyfyngedig - Mid Glamorgan - Porth
- Anvil Auto Care Ltd. - Mid Glamorgan - Porth
- Apex Surveyors Ltd. - Mid Glamorgan - Aberdare
- Applied Automation Ltd. - Mid Glamorgan - Bridgend
- Applied Power Services (South Western) Ltd - Mid Glamorgan - Rhondda
- Arb Autocare Ltd - Mid Glamorgan - Bridgend
- Arc-Tech Support Ltd - Mid Glamorgan - Bridgend
- Architectural & Structural Engineering Ltd. - Mid Glamorgan - Caerphilly
- Architecture Ir - Mid Glamorgan - Merthyr Tydfil
- Arco Ltd - Cardiff - Mid Glamorgan - Cardiff
- Armed Forces Careers Offices - Mid Glamorgan - Bridgend
- Army Careers Information Office - Mid Glamorgan - Merthyr Tydfil
- Arrow Polybags - Mid Glamorgan - Merthyr Tydfil
- Art by Design - Mid Glamorgan - Bridgend
- Arthur Lewis - Mid Glamorgan - Tonypandy
- Artisan Framing - Mid Glamorgan - Bridgend
- Arundel Decorating Services Ltd - Mid Glamorgan - Pontyclun
- Ascend I T Services - Mid Glamorgan - Aberdare
- Ascend IT Services - Mid Glamorgan - Aberdare
- Ascent Group Ltd, The - Mid Glamorgan - Pontypridd
- Ashtead - Mid Glamorgan - Bridgend
- Aspen Design Services Ltd. - Mid Glamorgan - Bridgend
- Assemblionics Ltd - Mid Glamorgan - Bridgend
- Astra Games Holdings Ltd - Mid Glamorgan - Bridgend
- Astra Plant Ltd. - Mid Glamorgan - Treharris
- Astutis - Mid Glamorgan - Cardiff
- Atlantic Plastics Ltd. - Mid Glamorgan - Bridgend
- Aubrey Electrical - Mid Glamorgan - Bridgend
- Aucom Ltd - Mid Glamorgan - Cardiff
- Authentic Alignment Ltd - Mid Glamorgan - Caerphilly
- Auto Sprays Paint Supplies - Mid Glamorgan - Pontypridd
- Avalon Plastics South Wales Ltd - Mid Glamorgan - Hengoed
- Avonride Ltd. - Mid Glamorgan - Maesteg
- Axis Window Co. Ltd. - Mid Glamorgan - Caerphilly
- Azon U K Ltd. - Mid Glamorgan - Hengoed
- B & W Tunnelling Ltd. - Mid Glamorgan - Bridgend
- B & C Non-Ferrous Foundry Ltd. - Mid Glamorgan - Caerphilly
- B A Builders (1999) Ltd. - Mid Glamorgan - Bridgend
- B C R - Mid Glamorgan - Caerphilly
- B C R Cash Registers - Mid Glamorgan - Caerphilly
- B J Plant Services - Mid Glamorgan - Bridgend
- B W M Ltd. - Mid Glamorgan - Pontypridd
- Badgers Landscape and Garden Design Centre Ltd - Mid Glamorgan - Bridgend
- Bank Farm Trailers Ltd - Mid Glamorgan - Bridgend
- Baraka Foods Ltd. - Mid Glamorgan - Pentre
- Bargain Blinds - Mid Glamorgan - Pontyclun
- Barnett R E & M - Mid Glamorgan - Pontyclun
- Baron Jackson Ltd. - Mid Glamorgan - Bridgend
- Barrie Lewis & Co. Ltd. - Mid Glamorgan - Caerphilly
- Barry Cosslett Ltd - Mid Glamorgan - Pontypridd
- Bathroom Installation Services - Mid Glamorgan - Bridgend
- Baxter Healthcare Ltd - Mid Glamorgan - Merthyr Tydfil
- BD Sites - Mid Glamorgan - Bargoed
- Beacons Products Ltd. - Mid Glamorgan - Merthyr Tydfil
- Beaver Power Ltd. - Mid Glamorgan - Merthyr Tydfil
- Bedwas Software Ltd - Mid Glamorgan - Caerphilly
- Bedwas Weathershield - Mid Glamorgan - Caerphilly
- Bema Engineering Ltd. - Mid Glamorgan - Pontypridd
- Benefits Agency - Mid Glamorgan - Porthcawl
- Bensons Bed Centres Ltd (Bridgend) (Bridgend) - Mid Glamorgan - Bridgend
- Bergstrom (Europe) Ltd. - Mid Glamorgan - Hengoed
- Besleys (Merthyr Tydfil) Ltd. - Mid Glamorgan - Merthyr Tydfil
- Bibby Sterilin Ltd - Mid Glamorgan - Pontypridd
- Biotage Gb Ltd. - Mid Glamorgan - Hengoed