| (TFC) Together for Change CIC | Other services | 2024 |
| 06369946 Unlimited | Professional & scientific | 2007 |
| 101 Entertainments Limited | Wholesale & retail | 2019 |
| 39 Onslow Road Limited | Real estate | 2006 |
| 5TH Flock Limited | Wholesale & retail | 2015 |
| 62SIX Developments Ltd | Construction | 2020 |
| 6R4 Lane Limited | Real estate | 2025 |
| 73OM Ltd | Professional & scientific | 2024 |
| A and N Removals Limited | Transport & logistics | 2018 |
| A D Richards Limited | Health & social care | 2003 |
| A Force of Nurture Limited | Manufacturing | 2022 |
| A J Carrington & Sons Ltd | Transport & logistics | 2002 |
| A Little BIT Crafty UK Ltd | Wholesale & retail | 2017 |
| A S Harries Probate Services Limited | Professional & scientific | 2021 |
| A W George Agriculture Limited | Agriculture & fishing | 2025 |
| A W Taylor Ltd | Wholesale & retail | 2019 |
| A&A Fish Ltd | Administrative & support | 2020 |
| A&A Heating, GAS & OIL Ltd | Construction | 2023 |
| A&B Richards Limited | Financial services | 2026 |
| A. W. George Limited | Administrative & support | 2017 |
| A.J.Collins(Building Contractors)Limited | Construction | 1960 |
| A.L. Phillips (Building Contractors) Limited | Construction | 2001 |
| A.W.A.R.A. Ltd | Administrative & support | 2021 |
| A1D Limited | Information & communication | 2012 |
| A40 Garage Limited | Wholesale & retail | 2011 |
| A40 Roofing Services Limited | Construction | 2009 |
| AAJ Capital Ltd | Financial services | 2025 |
| Aathmy Enterprises Ltd | Wholesale & retail | 2015 |
| AB Security & Electrical Services Limited | Construction | 2016 |
| Aber Traders Ltd | Hospitality | 2016 |
| Abercastle Boat Owners Community Interest Company | Arts & recreation | 2013 |
| Abergwaun Community Turbines Limited | Energy | 2014 |
| Aberwood Bespoke Ltd | Manufacturing | 2021 |
| Aberystwyth Accommodations Ltd | Hospitality | 2020 |
| Ability Power Limited | Professional & scientific | 1999 |
| Abisaja Ltd | Administrative & support | 2024 |
| Absolute Care Pembrokeshire Ltd | Health & social care | 2024 |
| AC Graphics Ltd. | Professional & scientific | 2018 |
| Accordhive Ltd | Other services | 2023 |
| Aces Sports Bar Ltd | Hospitality | 2026 |
| Acorn Collectibles Limited | Wholesale & retail | 2025 |
| Active Somatics Ltd | Health & social care | 2016 |
| Activity Pembrokeshire Limited | Other services | 2017 |
| Activity Wales Events Limited | Arts & recreation | 2013 |
| Actustas Trading Ltd | Wholesale & retail | 2022 |
| AD Howells Limited | Transport & logistics | 2011 |
| Adam's Bucketful of Hope Appeal Limited | Wholesale & retail | 2009 |
| Adams Keyston Hill Limited | Agriculture & fishing | 2012 |
| Adelbert Ltd | Administrative & support | 2020 |
| Advanced Fire & Security Pembs Ltd | Professional & scientific | 2021 |
| Adycio Wholesale Ltd | Wholesale & retail | 2024 |
| AEK Pembrokeshire Ltd | Hospitality | 2024 |
| Aermech Holdings Limited | Financial services | 2025 |
| Aermech Limited | Construction | 2007 |
| Affility Ltd | Other services | 2022 |
| Ahim Property Enterprises Ltd | Real estate | 2017 |
| AIM Consulting Group Ltd | Information & communication | 2026 |
| Air Adventures Wales Ltd | Arts & recreation | 2018 |
| Aitres Ltd | Real estate | 2020 |
| AJC Plant Limited | Construction | 2017 |
| Ak-Europe Ltd | Administrative & support | 2025 |
| Akta IP Ltd | Information & communication | 2012 |
| Aktiv Projects Ltd | Construction | 2014 |
| Alcid Investments Holdings Limited | Financial services | 2022 |
| Alcid Investments Limited | Financial services | 2020 |
| Alfa Ramz Gama Limited | Wholesale & retail | 2023 |
| Alfea Life Ltd. | Administrative & support | 2025 |
| ALI & ABY Catering Limited | Hospitality | 2026 |
| ALL 4 Wheels Ltd | Information & communication | 2024 |
| ALL Balanced Ltd | Extraterritorial | 2024 |
| ALL Pets Care Limited | Professional & scientific | 2007 |
| ALL Seasons Landscaping Wales Ltd | Administrative & support | 2016 |
| Allen MJ (Pembs) Ltd | Construction | 2021 |
| Allfirst Limited | Hospitality | 2002 |
| Alpine Promotions Limited | Administrative & support | 1998 |
| Alternative Health Center Ltd | Extraterritorial | 2024 |
| Alturatech Solutions Ltd | Information & communication | 2025 |
| Alun Evans | Professional & scientific | 2008 |
| Alys&Co House of Hair and Beauty Ltd | Other services | 2024 |
| AM Nawr Property Services Ltd | Real estate | 2020 |
| Amanita Solutions LP | | 2020 |
| Amberliving Ltd | Administrative & support | 2024 |
| Amdani Limited | Extraterritorial | 2025 |
| AMG Electrical (Pembs) Ltd | Construction | 2016 |
| Ammy Robinson Media Production Ltd | Arts & recreation | 2026 |
| Amrita SAI Ltd | Administrative & support | 2024 |
| Andrew Davies Agriculture Limited | Agriculture & fishing | 2003 |
| Andrew Hackett Consultancy Limited | Professional & scientific | 2018 |
| Andtan Limited | Extraterritorial | 2013 |
| Anelu Ltd | Real estate | 2022 |
| Angharad Thomas Photography Ltd | Professional & scientific | 2019 |
| Annaleene Holliday Limited | Other services | 2013 |
| Annavia Ltd | Other services | 2025 |
| Annemarie Advanced Aesthetics Ltd | Other services | 2026 |
| Annie & Mick Ltd | Health & social care | 2024 |
| Annikel Farm Limited | Agriculture & fishing | 2011 |
| Anplast Ltd | Other services | 2021 |
| Anthony Rees (Livestock) Limited | Professional & scientific | 2004 |
| Anticko Holding PC | | 2020 |
| AP Superstore Ltd | Wholesale & retail | 2024 |