| Associated Marine Training / AMT Boat Experiences Ltd | Boating instructor | Hamble Point Marina | Mon–Sat 09:00–18:00 |
| Associated Pallets Ltd | Plastic Pallets UK | Pallet supplier | Eling Ln, Eling Wharf | Mon–Thu 07:30–16:30 |
| AST Removals | Removals company | 60 Vaudrey Cl | Daily 08:00–22:00 |
| Atlantic Clinic- Private GP Gynaecologist Dentist | Medical centre | Mountbatten Business Centre, Millbrook Rd E | Mon–Fri 09:00–20:30 |
| Atlantic Gate Seafood and Cocktails | Seafood restaurant | Herbert Walker Ave | Mon–Fri 06:30–23:00 |
| Attitude Cycles | Motorcycle shop | 2-4 Stoneham Ln | Tue–Fri 09:30–16:00 |
| Automotive Glass Ltd | Auto glass repair service | Yard 1F, Automotive Glass, 312 Botley Rd | Mon–Fri 08:00–17:00 |
| Avenue Therapies | Psychologist | Unit 55, ❒ Basepoint Enterprise Centre, Andersons Rd | Mon–Fri 09:00–20:00 |
| B & D Foam | Plastic fabrication company | Eddystone Rd | Mon 08:00–16:30 |
| B Wilton Digger Hire Ltd | Plant and machinery hire | 124 Lyndhurst Rd | Mon–Tue 08:00–17:00 |
| Baby Giant Design Co | Graphic designer | Culverlands Bungalow, Winchester Rd | Mon–Fri 09:00–18:00 |
| Babyprints Southampton | Artist | Broad Oak | Sat 09:00–17:00 |
| Bainbridge International Limited | Promotional products supplier | Unit 8, Flanders Industrial Park, Flanders Rd | Mon–Tue 08:30–17:00 |
| Balance and Harmony Holistic Therapy | Reiki therapist | 197 Salisbury Rd | Mon–Fri 09:00–19:00 |
| Barrels Furniture | Rustic furniture shop | Tatchbury Ln | Mon–Fri 08:00–16:00 |
| BBC Coffee Limited | Coffee wholesaler | Adanac Drive Unit E3 & E4 | Mon–Fri 07:00–16:00 |
| Beautiful Windows | Blinds shop | 3 Fairview Dr | Wed 09:00–17:00 |
| Bee Elevated Holistic Health | Alternative medicine practitioner | 61 Manor Rd | Mon–Thu 09:00–20:00 |
| Benco Design structural Engineers | Structural engineer | Toldfield Architects, Freemantle Business Centre, 152 Millbrook Rd E | Mon–Fri 08:30–18:30 |
| Benham Precision Engineering | Precision engineer | Precision house, Rushington business park, Chapel Ln | Mon–Fri 08:00–16:30 |
| Bespoke Bedrooms | Fitted furniture supplier | Unit 5, Poplars Farm Cottage, Curdridge Ln | Mon–Fri 09:00–17:00 |
| Best Astrologer & Psychic Reader in UK | Top Horoscope Services | Get Your Ex-Love Back | Astrologer | 96 Oxford Ave | Daily Open 24 hours |
| Best Autocentres Ltd | MOT centre | Unit 10, Calmore industrial Estate, Eddystone Rd | Mon 08:00–18:00 |
| BH Live Active, Bitterne | Leisure centre | Bitterne Leisure Centre, Dean Rd | Mon 06:30–22:00 |
| BH Live Active, The Quays (Southampton) | Gym | 27 Harbour Parade | Mon–Thu 05:30–22:00 |
| Bio-Wise Pain & Injury Clinic | Pain control clinic | 37 Portsmouth Rd | Mon 10:00–18:00 |
| Bishop's Waltham Tree Surgeons Ltd | Arborist service | 33 Bosworth Gardens | Mon–Fri 07:00–19:00 |
| Bishops Waltham Pet Services | Dog day care centre | wyedale, New Rd | Fri 09:00–17:00 |
| Bitterne Spiritualist Church | Spiritist centre | 390 Bitterne Rd | Tue 14:00–21:30 |
| Black Wax Coffee And Records | Coffee store | 10 High St | Wed 08:00–16:00 |