| Ceredigion Register Office | Registry office;Wedding venue | Ceredigion Register Office, Canolfan Rheidol, Padarn Cres, Aberystwyth SY23 3UE | http://www.ceredigion.gov.uk/ | +44 1970 633580 | Aberystwyth | | SY23 3UE |
| Cyngor Sir Ceredigion County Council | Local government office;Social services organisation | Cyngor Sir Ceredigion County Council, Vicarage Hill, Aberaeron SA46 0DY | http://www.ceredigion.gov.uk/ | +44 1545 570881 | Aberaeron | | SA46 0DY |
| Ceredigion County Council | Local Government Office | Ceredigion County Council, Morgan St, Cardigan SA43 1DG | | +44 1545 570881 | Cardigan | | SA43 1DG |
| Ceredigion County Council | Local Government Office | Ceredigion County Council, Canolfan Rheidol, Rhodfa, Padarn Cres, Llanbadarn Fawr, Aberystwyth SY23 3UE | http://www.ceredigion.gov.uk/ | +44 1545 570881 | Aberystwyth | Llanbadarn Fawr, Aberystwyth | SY23 3UE |
| Ceredigion County Council | Local Government Office | Ceredigion County Council, Glan Yr Afon Industrial Estate, Aberystwyth SY23 3JQ | http://www.ceredigion.gov.uk/ | +44 1545 570881 | Aberystwyth | | SY23 3JQ |
| Delineate | Corporate office | Delineate, Llandysul SA44 4AD | https://delineate.ai/jobs | | Llandysul | | |
| Cefn Croes CDM | Corporate office | Cefn Croes CDM, Cefn Croes Wind Farm, Eisteddfa Gurig, Aberystwyth SY23 3LD | | +44 1970 890359 | Aberystwyth | Eisteddfa Gurig | SY23 3LD |
| Welsh Government | Government office | Welsh Government, Rhodfa Padarn, Llanbadarn Fawr, Aberystwyth SY23 3UR | https://www.gov.wales/ | | Aberystwyth | Llanbadarn Fawr, Aberystwyth | SY23 3UR |
| fforest | Corporate office | fforest, Cambrian Quay, Cardigan SA43 1EZ | http://fforestweddings.co.uk/ | +44 1239 800207 | Cardigan | | SA43 1EZ |
| Cyngor Cymuned Trawsgoed | Corporate office | Cyngor Cymuned Trawsgoed, Aberystwyth SY23 4AT | http://cyngor-trawsgoed.cymru/ | | Aberystwyth | | |
| Ffwrneithin | Corporate office | Ffwrneithin, Unnamed Road, Lampeter SA48 7QT | | | Lampeter | | SA48 7QT |
| Cyngor Llyfrau Cymru | Corporate office | Cyngor Llyfrau Cymru, Glan Yr Afon Industrial Estate, 16, Llanbadarn Fawr, Aberystwyth SY23 3JQ | http://llyfrau.cymru/ | | Aberystwyth | Llanbadarn Fawr | SY23 3JQ |
| Plaid Cymru Ceredigion Office | Political party office | Plaid Cymru Ceredigion Office, 32 Pier St, Aberystwyth SY23 2LN | | +44 1970 617492 | Aberystwyth | | SY23 2LN |
| Hafan Glyd | Corporate office | Hafan Glyd, Bryngwyn, Newcastle Emlyn SA38 9QQ | | | Newcastle Emlyn | Bryngwyn | SA38 9QQ |
| Ceredigion Council Depot, Penrhos | Council | Ceredigion Council Depot, Penrhos, A486 | http://www.ceredigion.gov.uk/ | +44 1970 633949 | Llandysul | | |
| Natural Weddings | Corporate office | Natural Weddings, BRIDGE WAREHOUSE, Cardigan SA43 3AA | http://natural.wedding/ | +44 1239 623633 | Cardigan | | SA43 3AA |
| Llandysul Memorial Park | Corporate office | Llandysul Memorial Park, Tirdref, New Rd, Llandysul | | | Llandysul | Llandysul | |
| Welsh Government | Local Government Office;Government office | Welsh Government, Government Buildings, Picton Terrace, Carmarthen SA31 3BT | https://gov.wales/ | +44 300 060 4400 | Carmarthen | | SA31 3BT |
| Carmarthenshire County Council | Town Hall | Carmarthenshire County Council, Ty Elwyn, Town Hall Square, Llanelli SA15 3AP | | | Llanelli | | SA15 3AP |
| CSA Recruitment | Job Centre;Temp agency | CSA Recruitment, Llanelli Gate Business Park, Llanelli SA14 8LQ | http://www.csarecruitment.co.uk/ | +44 1554 746746 | Llanelli | | SA14 8LQ |
| Support My Team | Corporate office | Support My Team, 21 Quay St, Ammanford SA18 3DB | http://supportmyteam.co.uk/ | | Ammanford | | SA18 3DB |
| Public Health Wales | Corporate office | Public Health Wales, 1 Parc Dewi Sant, Carmarthen | | | Carmarthen | Carmarthen | |
| Insignia Technology Systems | Corporate office | Insignia Technology Systems, 3A Hall St, Carmarthen SA31 1PH | https://www.insigniabs.co.uk/ | +44 1267 531101 | Carmarthen | | SA31 1PH |
| D.R of Llanelli | Corporate office | D.R of Llanelli, unit 4.3 9uu, Industrial Park Roundabout, Llanelli SA14 8LQ | | +44 1554 777736 | Llanelli | | SA14 8LQ |
| Brown's Consultancy Services | Corporate office | Brown's Consultancy Services, 38 Trallwm Rd, Llwynhendy, Llanelli SA14 9ET | http://www.bcswales.com/ | +44 7812 661105 | Llanelli | Llwynhendy | SA14 9ET |
| the office cleaning company | Cleaning service | the office cleaning company, Abergwili Rd, Carmarthenshire SA31 2HJ | http://officecleaningcompany.webs.com/: | +44 7796 840721 | Carmarthenshire | | SA31 2HJ |
| Celebration Mobile Team(셀러브레이션 모바일 팀) | Corporate office | Celebration Mobile Team(셀러브레이션 모바일 팀), Llanelli SA15 2LU | | | Llanelli | Llanelli | SA15 2LU |
| Kidwelly Community Hub | Corporate office | Kidwelly Community Hub, The Old Library, Bridge St, Kidwelly SA17 4UU | | +44 7469 734987 | Kidwelly | | SA17 4UU |
| County Hall | Town Hall | County Hall, Carmarthen SA31 1AD | | +44 1267 234567 | Carmarthen | Carmarthen | |
| Swanton Care | Corporate office | Swanton Care, Scarlet Court, Llanelli SA14 8QN | http://www.swantoncare.com/ | | Llanelli | | SA14 8QN |
| PWR | Corporate office | PWR, Llwyn Mendy Isaf, Llandeilo SA19 6YB | http://pwr.co.uk/ | +44 1558 823891 | Llandeilo | | SA19 6YB |
| Chelmor Property Limited | Corporate office | Chelmor Property Limited, 19 Murray St, Llanelli SA15 1AQ | http://chelmor.com/ | +44 7770 348057 | Llanelli | | SA15 1AQ |
| Carmarthen | | Carmarthen | | | Carmarthen | | |
| Mavers | Corporate office | Mavers, 43 Penllwynrhodyn Rd, Llwynhendy, Llanelli SA14 9NN | | | Llanelli | Llwynhendy | SA14 9NN |
| Home Care Office | Home Care Service | Home Care Office, 3 Spilman St, Carmarthen SA31 1LE | | +44 1267 242472 | Carmarthen | | SA31 1LE |
| Cillefwr Depot, Carmarthenshire County Council | Council | Cillefwr Depot, Carmarthenshire County Council, Johnstown, Carmarthen SA31 3QX | | | Carmarthen | Johnstown | |
| YmgynghorIAITH | Corporate office | YmgynghorIAITH, Llanelli SA15 3BH | http://ymgynghoriaith.cymru/hafan/ | +44 29 2236 2106 | Llanelli | Llanelli | |
| East Gate, Carmarthenshire County Council Offices | Corporate office | East Gate, Carmarthenshire County Council Offices, Llanelli SA15 3YF | | | Llanelli | Llanelli | |
| Company Support Carmarthenshire | Company registry | Company Support Carmarthenshire, Capel Seion Rd, Pontyberem, Llanelli SA15 5AP | | +44 7378 755644 | Llanelli | Pontyberem | SA15 5AP |
| HWB Parc Trostre Customer Service Centre Carmarthenshire County Council | Council | HWB Parc Trostre Customer Service Centre Carmarthenshire County Council, 2b Trostre Rd, Llanelli SA14 9UY | https://www.carmarthenshire.gov.wales/ | | Llanelli | | SA14 9UY |
| HWB Llanelli Customer Service Carmarthenshire County Council | District council | HWB Llanelli Customer Service Carmarthenshire County Council, 36 Stepney St, Llanelli SA15 3TR | | +44 1267 234567 | Llanelli | | SA15 3TR |
| Hwb Menter Sir Gaerfyrddin / Carmarthenshire Enterprise Hub | Business Centre | Hwb Menter Sir Gaerfyrddin / Carmarthenshire Enterprise Hub, Unit 4 St Catherine's Walk, Carmarthen SA31 1GA | https://carmarthenshireenterprisehub.co.uk/ | +44 1267 611298 | Carmarthen | | SA31 1GA |
| Carmarthenshire County Council | Council | Carmarthenshire County Council, County Hall, Castle Hill, Carmarthen SA31 1JP | https://www.carmarthenshire.gov.wales/home/council-services/ | +44 1267 234567 | Carmarthen | | SA31 1JP |
| Canolfan Gwaith Caerfyrddin | Carmarthen Jobcentre | Government office | Canolfan Gwaith Caerfyrddin | Carmarthen Jobcentre, Heol Ioan, John St, Carmarthen SA31 1QT | http://www.gov.uk/contact-jobcentre-plus | +44 800 169 0190 | Carmarthen | | SA31 1QT |
| Carmarthen Office Hub | Office rental agency | Carmarthen Office Hub, Ty Myrddin, Old Station Rd, Carmarthen SA31 1LP | https://carmarthenofficehub.co.uk/ | +44 7547 827645 | Carmarthen | | SA31 1LP |
| Saint David’s Park | Corporate office | Saint David’s Park, Job's Well Rd, Carmarthen SA31 3HG | | | Carmarthen | | SA31 3HG |
| Ty Gorwel | Corporate office | Ty Gorwel, Job's Well Rd, Carmarthen SA31 3HB | | | Carmarthen | | SA31 3HB |
| Transforming Places Team, Carmarthenshire County Council | Government office | Transforming Places Team, Carmarthenshire County Council, The Goods Shed, 4 Fron Terrace, Llanelli SA15 1BN | http://www.carmarthenshire.gov.uk/home/business/development-and-investment/Tyisha/ | | Llanelli | | SA15 1BN |
| Carmarthenshire County Council | Council | Carmarthenshire County Council, Carmarthen SA31 3HB | http://www.carmarthenshire.gov.wales/ | +44 1267 234567 | Carmarthen | Carmarthen | |
| HWB Ammanford Customer Service Centre Carmarthenshire County Council | District council | HWB Ammanford Customer Service Centre Carmarthenshire County Council, 41 Quay St, Ammanford SA18 3BS | | +44 7958 234957 | Ammanford | | SA18 3BS |
| M&D Care Ltd | Corporate office | M&D Care Ltd, Parc, Carmarthen SA31 2NF | http://www.mdcareltd.co.uk/ | +44 1792 885126 | Carmarthen | | SA31 2NF |
| CORN HOUSE | Corporate office | CORN HOUSE, 16 The Parade, Carmarthen SA31 1LY | | | Carmarthen | | SA31 1LY |
| The Beacon | Corporate office | The Beacon, Dafen, Pontyberem, Llanelli SA14 8LQ | | | Llanelli | Dafen, Pontyberem | SA14 8LQ |
| TROSTRE DEPOT | Corporate office | TROSTRE DEPOT, Trostre Rd, Llanelli SA14 9RA | | +44 1554 784148 | Llanelli | | |
| Cyngor Tref Caerfyrddin - Carmarthen Town Council | Council | Cyngor Tref Caerfyrddin - Carmarthen Town Council, Neuadd Ddinesig San Pedr - St Peters Civic Hall, 1 Maes Nott/Nott Square, Caerfyrddin/Carmarthen SA31 1PG | https://carmarthentowncouncil.gov.uk/ | +44 1267 235199 | Caerfyrddin/Carmarthen | | SA31 1PG |
| Carmarthenshire County Council | Council;County Government Office | Carmarthenshire County Council, Carregamman Ln, Ammanford SA18 3EL | http://www.carmarthenshire.gov.uk/ | +44 1267 234567 | Ammanford | | SA18 3EL |
| Scarlet Court | Corporate office | Scarlet Court, Heol Aur, Llanelli SA14 8QN | | +44 1554 899668 | Llanelli | | SA14 8QN |
| Cardiff Virtual Offices | Virtual office rental | 4th Floor, Cardiff Virtual Offices, 14 Museum Pl, Cardiff CF10 3BH | https://virtually-there.net/virtual-offices/cardiff/ | +44 29 2225 0410 | Cardiff | | CF10 3BH |
| Ty Meridian | Corporate office | Ty Meridian, Malthouse Ave, Pontprennau, Cardiff CF23 8GL | | | Cardiff | Pontprennau | CF23 8GL |
| W2 Business Centre | Office rental agency;Business Centre | W2 Business Centre, Wellington House, Wellington St, Cardiff CF11 9BE | https://w2o.wales/ | +44 29 2267 6680 | Cardiff | | CF11 9BE |
| ITV | Corporate office | 3, ITV, Assembly Square, Britannia Quay, Cardiff CF10 4PJ | http://www.itv.com/ | +44 844 881 0100 | Cardiff | | CF10 4PJ |
| BCB International Ltd. | Corporate office | BCB International Ltd., Howell House, Lamby Industrial Park, Wentloog Ave, Rumney, Cardiff CF3 2EX | http://bcbin.com/ | +44 29 2043 3700 | Cardiff | Rumney | CF3 2EX |
| RCP Wales & South West Office | Corporate office | Office 6G 23, RCP Wales & South West Office, Baltic House, Mount Stuart Square, Cardiff CF10 5FH | | +44 29 2049 4737 | Cardiff | | CF10 5FH |
| Tŷ William Morgan | Government office | Tŷ William Morgan, 6 Central Square, Cardiff CF10 1EP | https://www.gov.uk/government/news/uk-government-hub-ty-william-morgan-officially-opened | | Cardiff | | CF10 1EP |
| Workbench Offices | Office rental agency | Workbench Offices, 15 Neptune Ct, Vanguard Way, Cardiff CF24 5PJ | https://workbenchoffice.com/ | +44 29 2111 1023 | Cardiff | | CF24 5PJ |
| ACT Head Office & Cardiff Skills Centre | Corporate office;Accounting school;Apprenticeship center;Conference Centre;Training provider;Management school;Training centre | ACT Head Office & Cardiff Skills Centre, Ocean Park House, E Tyndall St, Cardiff CF24 5ET | http://www.acttraining.org.uk/ | +44 29 2046 4727 | Cardiff | | CF24 5ET |
| Castlebridge | Corporate office | Castlebridge, 20 Cowbridge Rd E, Cardiff CF11 9AD | https://castlebridge-cardiff.co.uk/ | | Cardiff | | CF11 9AD |
| UKSE - Office & Workshop Rental | Business park;Business Centre;Office rental agency roperty management company | UKSE - Office & Workshop Rental, Lewis Rd, Cardiff CF24 5SB | https://www.ukse.co.uk/workspace/cardiff-bay-business-centre/ | +44 29 2047 1122 | Cardiff | | CF24 5SB |
| Offices.co.uk Serviced Offices | Office rental agency | Offices.co.uk Serviced Offices, Cathedral Rd, Pontcanna, Cardiff CF11 9LJ | https://www.offices.co.uk/cardiff/ | | Cardiff | Pontcanna | CF11 9LJ |
| My Backyard | Corporate office | My Backyard, 78-80 Cyfarthfa St, Cardiff CF24 3HG | | | Cardiff | | CF24 3HG |
| No 2 Capital Quarter | Corporate office | No 2 Capital Quarter, 4BE, Tyndall St, Cardiff | | | Cardiff | | |
| Peacocks Head Office | Corporate office | Peacocks Head Office, Capital Link, Windsor Rd, Cardiff CF24 5NG | http://www.peacocks.co.uk/ | +44 29 2027 0000 | Cardiff | | CF24 5NG |
| BBC Cymru Wales | Corporate office | BBC Cymru Wales, 3 Central Square, Cardiff CF10 1FS | http://www.bbc.co.uk/ | +44 29 2032 2000 | Cardiff | | CF10 1FS |
| Cargio Office | Corporate office | Cargio Office, Cardiff CF14 | | | Cardiff | | CF14 |
| Hodge House | Corporate office | Hodge House, 114 -116 St Mary St, Cardiff CF10 1DY | http://www.hodgehousecardiff.com/building.php | +44 29 2022 5327 | Cardiff | | CF10 1DY |
| One Central Square | Corporate office | One Central Square, One Central Square, Cardiff CF10 1FS | | +44 29 2034 0614 | Cardiff | | CF10 1FS |
| CHURCHILL HOUSE | Corporate office | Churchill House, CHURCHILL HOUSE, 17 Churchill Way, Cardiff CF10 2HH | http://churchillhouse360.uk/ | | Cardiff | | CF10 2HH |
| C12 Business Centre | Office rental agency;Business Centre | C12 Business Centre, 12 Cathedral Rd, Pontcanna, Cardiff CF11 9LJ | https://c12.wales/ | +44 29 2111 1600 | Cardiff | Pontcanna | CF11 9LJ |
| Caron Group Cardiff Support Office | Corporate office | Unit 8, Caron Group Cardiff Support Office, Oak Tree Court, Cardiff Gate Business Park, Mulberry Dr, Pontprennau, Cardiff CF23 8RS | http://carongroup.wales/ | +44 1895 622500 | Cardiff | Pontprennau | CF23 8RS |
| Capita | Corporate office | Capita, 40 Windsor Pl, Cardiff CF10 3BW | | | Cardiff | | CF10 3BW |
| St Patrick's House | Corporate office | St Patrick's House, St Patricks House, 17 Penarth Rd, Cardiff CF10 5ZA | | | Cardiff | | CF10 5ZA |
| Capital Tower | Corporate office | Capital Tower, Cardiff CF10 3FA | http://www.capitaltowercardiff.co.uk/ | +44 29 2023 3341 | Cardiff | Cardiff | |
| Alexandra Gate Business Centre Ltd (Offices to rent in Cardiff) | Business Centre;Conference Centre;Co-working Space;Office rental agency;Virtual office rental | Alexandra Gate Business Centre Ltd (Offices to rent in Cardiff), Ffordd Pengam, Cardiff CF24 2SA | http://www.alexandragate.co.uk/ | +44 29 2089 4700 | Cardiff | | CF24 2SA |
| No. 3 Capital Quarter | Corporate office | No. 3 Capital Quarter, Cardiff CF10 4BZ | https://www.bt.com/about | | Cardiff | | |
| Woodland House | Corporate office | Woodland House, Maes-Y-Coed Rd, Cardiff CF14 | | +44 29 2074 7747 | Cardiff | | CF14 |
| Office Space In Town | Office rental agency;Business Centre;Conference Centre;Co-working Space;Events Venue;Executive suite rental agency;Retail space rental agency;Virtual office rental | Office Space In Town, Temple Court, 13A Cathedral Rd, Cardiff CF11 9HA | http://www.officespaceintown.com/serviced-offices/cardiff-temple-court | +44 29 2022 1022 | Cardiff | | CF11 9HA |
| Cardiff Bay Business Centre | Office rental agency | Cardiff Bay Business Centre, Lewis Rd, Cardiff CF24 5BS | https://www.ukse.co.uk/workspace/cardiff-bay-business-centre/ | +44 29 2047 1122 | Cardiff | | CF24 5BS |
| South Gate House | Corporate office | South Gate House, Cardiff CF10 1EW | | | Cardiff | | |
| Cornel UK Ltd | Business-to-Business service | Cornel UK Ltd, St. Martin's Rd, Caerphilly CF83 1EH | | +44 845 130 4169 | Caerphilly | | CF83 1EH |
| Town Square Admin Support | Business administration service;Bookkeeping service;Event Planning Service;Telephone answering service | Town Square Admin Support, Fusion House, Caerphilly Business Park, Van Rd, Caerphilly CF83 3ED | https://www.townsqadmin.co.uk/ | +44 29 2120 2130 | Caerphilly | | CF83 3ED |
| The Business Protection Company | Life Insurance Agency | The Business Protection Company, C11 The Lodge, Caerphilly Business Park, Caerphilly CF83 3GG | | +44 29 2167 5222 | Caerphilly | | CF83 3GG |
| Up to 11 Ltd | Corporate office | Up to 11 Ltd, Britannia House, Caerphilly Business Park, Van Rd, Caerphilly CF83 3GG | http://upto11.co.uk/ | | Caerphilly | | CF83 3GG |
| President Commercial Finance Ltd | Corporate office | President Commercial Finance Ltd, Merlin House, Priory Dr, Langstone, Caerphilly, Newport NP18 2HJ | | +44 1633 415330 | Newport | Langstone, Caerphilly | NP18 2HJ |
| Visit Caerphilly | Tourist Information Centre;Tourist attraction | Visit Caerphilly, The Twyn, Caerphilly CF83 1JL | http://www.visitcaerphilly.com/ | +44 29 2088 0011 | Caerphilly | Caerphilly | CF83 1JL |
| Signum Health | Corporate office | Signum Health, Western Industrial Estate, Unit 4, Flexspace, Lon-Y-Llyn, Caerphilly CF83 1BE | | +44 29 2167 9134 | Caerphilly | | CF83 1BE |
| Excellence Hospitality | Corporate office | Excellence Hospitality, Maes Watford, Caerphilly CF83 1LP | http://www.excellencehospitality.com/ | +44 29 2264 4463 | Caerphilly | | CF83 1LP |
| CPS Group Ltd | Commercial printer;Digital printerackaging Supply Shop;Stationery manufacturer | Unit 34, CPS Group Ltd, Pontygwindy Industrial Estate, 35 Sir Alfred Owen Way, Caerphilly CF83 3HU | https://www.cpsstore.co.uk/ | +44 29 2086 0899 | Caerphilly | | CF83 3HU |
| Caer Health Services Ltd | Occupational health service;Mental Health Services | Caer Health Services Ltd, 5a Caerphilly Business Park, Van Road, Caerphilly CF83 3GS | http://www.caerhealth.co.uk/ | +44 29 2088 1967 | Caerphilly | | CF83 3GS |
| We Protect Your Money Limited | Corporate office | We Protect Your Money Limited, Western Industrial Estate, Suite 40 Evans Business Centre, Caerphilly CF83 1BE | http://weprotectyourmoney.com/ | +44 800 111 6768 | Caerphilly | | CF83 1BE |
| NIA Facilities Management | Corporate office | NIA Facilities Management, unit 2, PONTYGWINDY INDUSTRIAL ESTATE, 31 Sir Alfred Owen Way, Caerphilly CF83 3HU | http://niafm.co.uk/ | +44 333 188 1001 | Caerphilly | | CF83 3HU |
