| Inprint INK Ltd | Manufacturing | 2024 |
| Inspector Nasset Ltd | Administrative & support | 2019 |
| Intarace Ltd | Information & communication | 2021 |
| Intaride Limited | Information & communication | 1995 |
| Ioptum Ltd | Information & communication | 2026 |
| Jabajak Vineyard Restaurant & Rooms Ltd | Hospitality | 2021 |
| Jackson & Kelly Stainless Steel Fabrications Limited | Manufacturing | 1983 |
| James Hendygwyn Limited | Real estate | 2013 |
| Jay's Demolition Limited | Construction | 2025 |
| Jeremy Bowen Rees Consulting Limited | Professional & scientific | 2025 |
| Jessie Keane Ltd | Arts & recreation | 2010 |
| Jill Mcgivering Ltd | Arts & recreation | 2009 |
| Jmck Limited | Agriculture & fishing | 1978 |
| John CWM Ltd | Real estate | 2024 |
| Jones Motors (Login) Limited | Transport & logistics | 1965 |
| Kanso Business Limited | Professional & scientific | 2019 |
| Karen J. Hasted Ltd. | Professional & scientific | 2002 |
| KF22 Ltd | Administrative & support | 2024 |
| KHM Project Management Ltd | Other services | 2016 |
| Kinns LLP | | 2016 |
| Kinvara (Agri) Ltd | Agriculture & fishing | 2024 |
| KSW Property Group Ltd | Real estate | 2025 |
| Lammas Earth Centre CIC | Education | 2022 |
| Lammas Retreats Ltd | Other services | 2024 |
| Lammas Training Company Ltd | Education | 2024 |
| Landsker Business Solutions Limited | Professional & scientific | 1999 |
| LBR Breakdown and Recovery Services Limited | Wholesale & retail | 2023 |
| LBR Car and Commercials Ltd | Manufacturing | 2026 |
| LEE & Phillips Ltd | Construction | 2017 |
| Lewis Welding Ltd | Manufacturing | 1996 |
| LHP Consulting Services Ltd | Administrative & support | 2016 |
| Liberating Cycles CIC | Education | 2025 |
| Llan Property Limited | Real estate | 2023 |
| Llewelyn Davies Business Consultants Limited | Professional & scientific | 2013 |
| Llwyngwyddel Farm Animal Sanctuary C.I.C. | Agriculture & fishing | 2022 |
| Loving Tums Limited | Health & social care | 2023 |
| Lunar Phase Ltd | Wholesale & retail | 2023 |
| M Price Plumbing & Heating Limited | Construction | 2017 |
| Mainwell Limited | Administrative & support | 2020 |
| Mansion of Mystery Ltd | Arts & recreation | 2018 |
| Margaret Hutchinson Limited | Arts & recreation | 2002 |
| Mark West Electrical Services Limited | Construction | 2018 |
| Mary's Farm House Limited | Manufacturing | 2011 |
| Maureen's Ruminant Nutrition Ltd | Professional & scientific | 2023 |
| Maysmoor Limited | Other services | 2012 |
| MD Morris Construction Limited | Construction | 2026 |
| Melys Diagnostics Limited | Professional & scientific | 2004 |
| MFE Applied Technology Ltd | Professional & scientific | 2003 |
| Midlife Star Limited | Other services | 2014 |
| Milford Haven Developments Limited | Construction | 2005 |
| Mineral Water Vending Limited | Administrative & support | 2017 |
| Mobad Solutions Ltd | Other services | 2017 |
| Monada Limited | Extraterritorial | 2017 |
| Moores UK Electrical Ltd | Construction | 2014 |
| Mountain Town Limited | Hospitality | 2018 |
| N Morgans & SON Ltd | Construction | 2008 |
| Nantyffin Hotel Limited | Hospitality | 2014 |
| Narberth Old School Developments Limited | Real estate | 2018 |
| National Philharmonic Orchestra Limited | Arts & recreation | 1977 |
| Natural Form Furniture Limited | Manufacturing | 2023 |
| NCG Coaching Ltd | Professional & scientific | 2020 |
| Net-Sites Limited | Information & communication | 1999 |
| Neyland CIC | Real estate | 2014 |
| Ocean 247 Limited | Extraterritorial | 2008 |
| Olivia Alice Design Limited | Information & communication | 2016 |
| Osea Mana Estate Ltd | Hospitality | 2025 |
| Otcare Services Ltd | Health & social care | 2013 |
| Owensfield Ltd | Professional & scientific | 2022 |
| P T Homes Limited | Construction | 2020 |
| P.I. Logic Limited | Manufacturing | 1987 |
| Pantycelyn Cakes Limited | Manufacturing | 2006 |
| Parkwall Enterprises Limited | Administrative & support | 2012 |
| Pembrokeshire Car & Van Sales Ltd | Wholesale & retail | 2021 |
| Pontfaen Farm Limited | Agriculture & fishing | 1997 |
| Portagrid UK Ltd | Wholesale & retail | 2026 |
| Preseli Mountains Retreat Ltd | Hospitality | 2023 |
| Preseli Recycling Ltd | Water & waste | 2024 |
| Printed Chocolates Ltd | Manufacturing | 2014 |
| Prodev Engineering Limited | Professional & scientific | 2020 |
| Protection Matters Limited | Financial services | 2015 |
| PTP Quality Training Limited | Education | 2004 |
| Puffin Group UK Ltd | Financial services | 2015 |
| Pure Electrical Contractors Ltd | Construction | 2018 |
| Q6 DM Software Ltd | Information & communication | 2019 |
| R - Tech Solutions Ltd | Manufacturing | 2000 |
| R M D Electrical Services Limited | Construction | 2006 |
| R N Powell Limited | Professional & scientific | 2011 |
| RBT Engineering Ltd | Professional & scientific | 2022 |
| Reindeer 4 Hire Limited | Extraterritorial | 2007 |
| Release Mobile Ltd | Information & communication | 2012 |
| RES Technica Limited | Manufacturing | 2011 |
| Resilient Cyber Solutions Ltd | Administrative & support | 2022 |
| Rhiw LAS Limited | Households | 2013 |
| Riverlea Limited | Wholesale & retail | 2007 |
| Riverlea Tractors Limited | Wholesale & retail | 1992 |
| Roadhouse Property Group Ltd | Real estate | 2022 |
| Roadhouse Whitland Ltd | Hospitality | 2021 |
| Robin Lydall Building Services Ltd | Construction | 2014 |
| Robotic Milking Systems Limited | Information & communication | 2025 |
| RT Process Services Ltd | Professional & scientific | 2020 |