| 1 (UK) Explorer Brigade CIC | Other services | 2026 |
| 101B Clarendon Road Limited | Households | 2005 |
| 109 Hope Transport Ltd | Transport & logistics | 2024 |
| 109 Southwood Road Management Company Limited | Households | 2000 |
| 111 Brigade Ltd | Wholesale & retail | 2025 |
| 128 Alexandra Road Management Company Limited | Real estate | 1990 |
| 13 Victoria Street Limited | Real estate | 2018 |
| 157 & 159 Brockhurst Road Management Company Limited | Households | 2003 |
| 180/182 Brockhurst Road and 4/5 Beryl Avenue Management Company Limited | Households | 2004 |
| 187 Fareham Limited | Real estate | 2025 |
| 1DPRINTING Ltd | Wholesale & retail | 2023 |
| 1EUROPA Ltd. | Information & communication | 2026 |
| 2 Much Hassle Composites Limited | Manufacturing | 2025 |
| 2000PC Limited | Real estate | 1999 |
| 203D Fareham Limited | Real estate | 2025 |
| 24 Fitness & Strength Gosport Limited | Arts & recreation | 2025 |
| 265 Forton Road Limited | Real estate | 2005 |
| 2SIX Performance Limited | Professional & scientific | 2025 |
| 3 Ashburton Road Residents Company Limited | Households | 2007 |
| 3 Mile Ltd | Professional & scientific | 2022 |
| 33 Green Bottles Ltd | Wholesale & retail | 2017 |
| 360FIRE Limited | Administrative & support | 2020 |
| 3PS Group Limited | Administrative & support | 2019 |
| 4-SITE Estates Ltd | Real estate | 2023 |
| 4-SITE Power & Fibre Networks Ltd | Construction | 2019 |
| 4-SITE TM Ltd | Construction | 2019 |
| 4-SITE Training Academy Ltd | Education | 2025 |
| 43 Avery Lane Freehold Limited | Real estate | 2014 |
| 4EVER Swim Ltd | Education | 2023 |
| 4TN Consulting Ltd | Administrative & support | 2014 |
| 5 Brewers Ltd | Hospitality | 2020 |
| 5G Security Services Limited | Wholesale & retail | 2020 |
| 80 Station Road (Sholing) Limited | Households | 2005 |
| 99 Film Ltd | Information & communication | 2022 |
| A & a Property Management Services Limited | Real estate | 2014 |
| A & a Nash Ltd | Other services | 2012 |
| A & C E Bikes Ltd | Wholesale & retail | 2025 |
| A & G Lettings Ltd | Real estate | 2020 |
| A & H Homes South Coast Limited | Real estate | 2025 |
| A & M Elite Property Management Limited | Real estate | 2016 |
| A C Travel Limited | Transport & logistics | 2009 |
| A Cheeky Slice Ltd | Hospitality | 2025 |
| A Lees Bricklaying Contractors Southern Limited | Construction | 2023 |
| A P B Essential Driving Services Limited | Transport & logistics | 2014 |
| A R Whitehead Limited | Construction | 2007 |
| A Slice of Vinyl Limited | Wholesale & retail | 2022 |
| A to B Autos Ltd | Wholesale & retail | 2013 |
| A Upton Limited | Construction | 2003 |
| A&R Interior and Exterior Wall Finishes Ltd | Construction | 2025 |
| A. & S. Motors (Gosport) Limited | Real estate | 1990 |
| A. Lees Bricklaying Contractors Ltd | Construction | 1997 |
| A.& S. Motors Limited | Wholesale & retail | 1996 |
| A.A. Advantage Limited | Wholesale & retail | 2003 |
| A.B.W Property Management Ltd | Real estate | 2020 |
| A.J.P Decorating Ltd | Construction | 2026 |
| A.R.G Civils & Surfacing Ltd | Construction | 2024 |
| A.W.S. Cleaning Services Limited | Administrative & support | 2001 |
| A1 Drivestyle Limited | Construction | 2002 |
| A2B Financial Services Ltd | Administrative & support | 2020 |
| A2B Taxi Fareham Ltd | Transport & logistics | 2025 |
| A2Z Drugs Ltd | Real estate | 2020 |
| AA Biomass Group Ltd | Wholesale & retail | 2025 |
| AB Cooling Limited | Manufacturing | 2018 |
| AB Southern Ltd | Construction | 2010 |
| Abbasi Marketplace Ltd | Wholesale & retail | 2025 |
| Abesin Groundworks Limited | Construction | 2023 |
| Abjcollectables Ltd | Wholesale & retail | 2026 |
| Able 1 GAS Limited | Construction | 2011 |
| Able Steel Fabrications Ltd | Construction | 1995 |
| ABM Computer Solutions Ltd | Information & communication | 2003 |
| Abrehart Fencing & Landscaping Limited | Administrative & support | 2025 |
| Academy Training Solutions Limited | Education | 2011 |
| Acare Home Care Ltd | Health & social care | 2026 |
| Access Care Recruitment Limited | Administrative & support | 2019 |
| Accomplished Care Limited | Health & social care | 2021 |
| Ace of Spades Contractors Ltd | Administrative & support | 1999 |
| Ace of Spades Holdings Limited | Real estate | 2019 |
| Ace Teach Ltd | Education | 2024 |
| Acorn Care Solutions Ltd | Health & social care | 2022 |
| ACS Site Services Limited | Extraterritorial | 2013 |
| Activeayesh Ltd | Information & communication | 2024 |
| Adar Style Ltd | Other services | 2026 |
| Addver Cars Ltd | Transport & logistics | 2011 |
| Adfinishers Limited | Construction | 2016 |
| Adhd & U CIC | Health & social care | 2025 |
| Adlaser Profiles Limited | Manufacturing | 2017 |
| Adlis Driving School Ltd | Education | 2023 |
| Admiral Electrical Services Ltd | Manufacturing | 2026 |
| Admiral's Quay Gosport Limited | Households | 2015 |
| Adorable & Cute Limited | Wholesale & retail | 2017 |
| Advanced Craft Ltd | Construction | 2003 |
| Advanced Seating Solutions Ltd | Other services | 2016 |
| Adweld Fabrications Limited | Manufacturing | 2011 |
| Aekka Quick FIX Limited | Manufacturing | 2025 |
| AES Transport Consultant Ltd | Professional & scientific | 2022 |
| Aeyrow Ltd | Wholesale & retail | 2025 |
| AF Fire Compliance Ltd | Public administration | 2026 |
| Afas Group Ltd | Financial services | 2022 |
| Affordable Self Storage Limited | Transport & logistics | 1998 |
| AFG Enterprise Limited | Other services | 2021 |