| Leahmorgan Ltd | Hospitality | 2018 |
| Leeky Barrel Brewing Limited | Manufacturing | 2023 |
| Lenger Shellfish Limited | Manufacturing | 1955 |
| Leoson Limited | Construction | 2021 |
| Leslie a. Parsons & Sons (Burry Port) Limited | Manufacturing | 1977 |
| Lighthouse Commercials Ltd | Real estate | 2024 |
| Lighthouse Financial Services Limited | Financial services | 2003 |
| Lighthouse Stage School CIC | Arts & recreation | 2025 |
| Littlewood Propertys Limited | Real estate | 2024 |
| Llwyn Property Development's Limited | Construction | 2021 |
| Lolfa Lolfa CYF. | Hospitality | 2023 |
| LST Property Ltd | Real estate | 2020 |
| Luke Jenkins Limited | Construction | 2023 |
| Lumin Axis Ltd | Information & communication | 2025 |
| Marinedronesolutionsuk Limited | Manufacturing | 2025 |
| Marsh Inspection Services Limited | Professional & scientific | 2012 |
| MBA Law Ltd | Professional & scientific | 2025 |
| MBK Property Ltd | Real estate | 2021 |
| Mccarthy-Owens Service Contracts Ltd | Professional & scientific | 2011 |
| Mckechnie Concepts Ltd | Professional & scientific | 2018 |
| Meganmo Limited | Hospitality | 2023 |
| Merlon Limited | Agriculture & fishing | 1985 |
| Miggis Carpentry and Building Services Limited | Construction | 2021 |
| MJB Transport Services Ltd | Transport & logistics | 2022 |
| Mmlh Limited | Transport & logistics | 2026 |
| Mogsleah's Limited | Hospitality | 2014 |
| Morton Kathrens LLP | | 2021 |
| Moth Coffi Ltd | Manufacturing | 2025 |
| Mrac Ltd | Construction | 2021 |
| MTM Plastics Ltd | Administrative & support | 2018 |
| Mumbles Oyster Company Limited | Agriculture & fishing | 2012 |
| Mutlakpharm Limited | Health & social care | 2016 |
| Myhill Properties Limited | Real estate | 2020 |
| N80 Property Renovations Limited | Construction | 2025 |
| Nature Protects Limited | Manufacturing | 2024 |
| New Style Barber Burryport Limited | Other services | 2024 |
| Nora Hill Consulting Ltd | Administrative & support | 2025 |
| NW Software Ltd | Information & communication | 2016 |
| OK Financial Ltd | Financial services | 2018 |
| P & D Holdings Group Limited | Financial services | 2021 |
| Paige Plumbing and Heating Ltd | Construction | 2021 |
| Paul Stewart Multimedia Limited | Information & communication | 2026 |
| Pembrey and Burry Port Community Connections C.I.C. | Wholesale & retail | 2025 |
| Pembrey Country Inn Ltd | Hospitality | 2026 |
| Pembrey Mountain Trust | Arts & recreation | 2013 |
| Pembrey Park Riding Centre Ltd. | Agriculture & fishing | 2010 |
| Pembrey Properties Limited | Real estate | 1994 |
| Pembrey West Wales Airport Limited | Transport & logistics | 1999 |
| Phocat Limited | Financial services | 2022 |
| Pinnaderm Ltd | Professional & scientific | 2010 |
| PIW Solutions Ltd | Financial services | 2018 |
| Poppies Bar Limited | Hospitality | 2023 |
| Port Stone Construction Ltd | Construction | 2024 |
| Port Stone Landscape Products Limited | Wholesale & retail | 2023 |
| Principio UK Limited | Information & communication | 2008 |
| R J Sheen CYF | Construction | 2026 |
| RAY Evans Ltd | Manufacturing | 2015 |
| RAY Scuba Services Ltd | Education | 2025 |
| Razor Marine & Fabrications Ltd | Manufacturing | 2023 |
| Red Kite Art and Jewels Limited | Agriculture & fishing | 2015 |
| Richard Thomas and Co (Hydro) Ltd | Agriculture & fishing | 2016 |
| RJ Traders International Limited | Manufacturing | 2025 |
| Rklswims C.I.C. | Education | 2025 |
| Rklswims Education Ltd | Education | 2026 |
| ROB Mathias CYF. | Construction | 2014 |
| Rood Geomatics Ltd | Professional & scientific | 2026 |
| RWP Accounting Solutions Limited | Professional & scientific | 2017 |
| S.P O'Neill Limited | Real estate | 2001 |
| SA16 Development Ltd | Wholesale & retail | 2025 |
| Sahan Pizza Ltd | Hospitality | 2025 |
| Sams Groundworks Ltd | Construction | 2023 |
| Sawna Llanw Ltd | Other services | 2025 |
| Scoffer Pizza Ltd | Hospitality | 2026 |
| Scorpion Cleaning Ltd | Administrative & support | 2018 |
| Scsal Limited | Manufacturing | 2013 |
| Seafood Brands Ltd | Administrative & support | 2022 |
| Seaswan Commercial Ltd | Manufacturing | 2013 |
| Securidoor (Cymru) Limited | Administrative & support | 2008 |
| Silurian Holdings Limited | Financial services | 2025 |
| Site for UK Ltd | Administrative & support | 2023 |
| Skyline Softwash Southwales Ltd | Administrative & support | 2024 |
| Spuddly Limited | Real estate | 2023 |
| Starlight Gold International Ltd | Mining & quarrying | 2024 |
| Stoe Escort Vehicle Services Limited | Transport & logistics | 2019 |
| Swiss Valley Construction Ltd | Construction | 2024 |
| Tasties by Kels Ltd | Hospitality | 2025 |
| Tethys Oysters Ltd | Agriculture & fishing | 2016 |
| THE ASH Bar Grill & Hotel Limited | Hospitality | 2024 |
| THE Ashburnham Estate Limited | Financial services | 2024 |
| THE Michael Scott Paper Company Ltd | Health & social care | 2024 |
| THE Veterans Group Ltd | Other services | 2018 |
| Thomas James & Associates Limited | Extraterritorial | 2024 |
| Thomas James Solutions Ltd | Information & communication | 2026 |
| Timeverse Limited | Agriculture & fishing | 1991 |
| Together for Neurodiversity CIC | Education | 2024 |
| Towy Exterior Cleaning Solutions Ltd | Administrative & support | 2021 |
| Tradematterworks Limited | Financial services | 2025 |
| Triport Executive Ltd | Administrative & support | 2026 |
| Turkish Barber Burryport Limited | Other services | 2020 |
| Verdantis Eco Ltd | Construction | 2024 |