| 00218892 Limited | | 1927 |
| 02969355 Limited | Construction | 1994 |
| 1 2 WIN Limited | Professional & scientific | 2004 |
| 11 ST Simons Road Management Limited | Households | 1998 |
| 110-112 Netherhampton Road Limited | Households | 2002 |
| 116 Park Road (Farnborough) Limited | Hospitality | 1998 |
| 12 Buer Road Management Company Limited | Households | 2003 |
| 12 Victoria Road North Limited | Households | 2007 |
| 129 Consultants Limited | Other services | 2008 |
| 14LS Services Limited | Administrative & support | 2005 |
| 16-29 Pier Close RTM Company Limited | Households | 2023 |
| 1865 LLP | | 2007 |
| 1ST Call Support Ltd | Information & communication | 2006 |
| 1ST Class Floors Limited | Construction | 2003 |
| 20 Essex Road Management Company Limited | Real estate | 1999 |
| 20 Nightingale Road, Southsea, Residents Association Ltd | Administrative & support | 1994 |
| 21 Nightingale Road Ltd | Real estate | 2025 |
| 256I Limited | Information & communication | 2007 |
| 28 Howard Road Management Company Limited | Households | 1999 |
| 2GO Limited | Wholesale & retail | 2003 |
| 2HEC LLP | | 2007 |
| 3 Portland Terrace RTM Company Limited | Households | 2004 |
| 33/36 ST Leonards Road, Winchester Limited | Households | 1986 |
| 33/40 Bliss Close Management Company Limited | Households | 2000 |
| 37 Osborne Road Residents Association Limited | Households | 2002 |
| 3RIT Ltd | Information & communication | 1997 |
| 40 Church Street Management Company Limited | Real estate | 1998 |
| 40-43 MPW Management Company Ltd | Households | 2001 |
| 46 Nightingale Road, Southsea Residents Management Association Limited | Households | 1986 |
| 47 Cottage Grove RTM Company Limited | Hospitality | 2006 |
| 5 Wilton Street (Plymouth) Limited | Extraterritorial | 2006 |
| 5A Trading Ltd | Other services | 2026 |
| 66 SAN Diego Road Management Company Limited | Real estate | 2004 |
| 7 Stafford Road Management Company Limited | Hospitality | 2004 |
| 7 Star Chauffer Services Ltd | Transport & logistics | 2026 |
| 76 ST. Andrews Road Limited | Households | 1995 |
| 7WISDOM Limited | Health & social care | 2015 |
| 815-275-1 Limited | Real estate | 2021 |
| 986-232-1 Limited | Real estate | 2022 |
| A G Cottrell Limited | Agriculture & fishing | 2003 |
| A Good Plumber Ltd | Construction | 2006 |
| A H Buckham Limited | Real estate | 1977 |
| A Little OFF the Top Limited | Other services | 1999 |
| A P Holland Construction Limited | Construction | 2005 |
| A P Homes Limited | Construction | 2003 |
| A S D South Limited | Construction | 1997 |
| A S Rawlings (Transport) Limited | Transport & logistics | 2003 |
| A Select Production Limited | Information & communication | 1990 |
| A W Hair Limited | Other services | 2006 |
| A-2-B Distribution Services Limited | Transport & logistics | 2005 |
| A.B Martin and SON Limited | Other services | 1999 |
| A.D. Walter Limited | Agriculture & fishing | 1956 |
| A.D.I. Driving Tuition Limited | Wholesale & retail | 1991 |
| A.M.H.E.C. Limited | | 1975 |
| A.N.A. Financial Planning Limited | Real estate | 1999 |
| A1 Security Automation Ltd | Extraterritorial | 2007 |
| A1 Security Systems Limited | Administrative & support | 1996 |
| A2 A4 Fixings Limited | Wholesale & retail | 2001 |
| AA Health Solutions Ltd | Other services | 2021 |
| Aadvark Supplies Limited | Other services | 1994 |
| Aaffcom Limited | Real estate | 2022 |
| AAS Consultancy Limited | Professional & scientific | 2000 |
| Aask Property Developments Limited | Construction | 2006 |
| Abactor Management Association Limited | Households | 1963 |
| ABC Driver Training Limited | Education | 2003 |
| ABC Environs Limited | Professional & scientific | 2000 |
| Abel Letting & Property Management Ltd | Construction | 2005 |
| Abhl Digital Limited | Professional & scientific | 1998 |
| Abhl Digital Radio Limited | Professional & scientific | 1998 |
| Abhl Multiplex Limited | Extraterritorial | 2004 |
| Abigail Huberts Corporation Ltd | Health & social care | 2013 |
| Abraham & Dobell Ltd. | Financial services | 2005 |
| Abtc Projects Limited | Professional & scientific | 2007 |
| Academy at NO. 5 Limited | Education | 2006 |
| Acadia Timber Limited | Manufacturing | 2000 |
| Accelerated Solutions Limited | Professional & scientific | 2007 |
| Accuracy Investments Limited | Professional & scientific | 1993 |
| Ace Brickwork Limited | Construction | 2007 |
| Ace Handling UK Ltd | Transport & logistics | 2006 |
| Ace Liftaway Enviromental Services Limited | Professional & scientific | 2005 |
| Ace Liftaway Waste Management Limited | Professional & scientific | 2005 |
| Ace Line Paving Limited | Construction | 2007 |
| Ace Processors Limited | Manufacturing | 2005 |
| ACP Freight Services Limited | Transport & logistics | 1996 |
| ACS (Construction Services) Ltd | Extraterritorial | 1979 |
| ACS Residential Limited | Administrative & support | 2008 |
| Acsys Design Limited | Professional & scientific | 2007 |
| ACTIV8 Computer Solutions Limited | Information & communication | 2003 |
| Active Websites Limited | Information & communication | 2004 |
| Adaptive Audio Limited | Professional & scientific | 1990 |
| ADB Limited | Professional & scientific | 2002 |
| Adbikes Media Limited | Professional & scientific | 1997 |
| Addymeetsgrillz (Amgz) Ltd | Wholesale & retail | 2022 |
| Adsyst (Automation) Limited | Information & communication | 1988 |
| Advanced Additives Limited | Wholesale & retail | 2022 |
| Advanced Marine Innovation Technology Subsea Limited | Professional & scientific | 1999 |
| Adventa Limited | Extraterritorial | 1994 |
| Aerojet Ltd | Professional & scientific | 2007 |
| AES Commercial Properties Limited | Extraterritorial | 1998 |
| AES Environmental Systems Limited | Construction | 1999 |