- A Different World Festival
- A2Dominion Group
- Abbeyfield Reading Society Ltd
- ABC to read (Assisting Berkshire Children to Read)
- Ability Housing Association
- AbilityNet
- Access Sport
- Accessible Boating Association
- Action for Children
- Action on Hearing Loss
- ActionAid
- Adult Dyslexia Centre
- Adventist Community Ministries
- Africa Christian Fellowship
- Age Concern Bracknell Forest
- Age UK Berkshire
- Age UK Caversham Shop
- Age UK Oxon
- Age UK Pangbourne
- Age UK Reading
- Age UK Whitley Shop
- Air Cadets – 1996 (Earley) Sqn
- Al-Anon Family Groups
- Alafia (Acre Family Support Team)
- Alan Place Residents’ Association
- Alana House
- Aldbrickham Clog & Step Dancers
- Aldworth Philharmonic Orchestra
- Alexander Devine Children’s Hospice Service
- All Saints Church of England
- Alliance for Cohesion and Racial Equality (ACRE)
- Alternative Queen of Reading
- Always Showing Talent Media
- Alzheimer’s Society
- Ambassadors of Southcote Children’s Centre
- Amersham Road Estate Neighbourhood Association (ARENA)
- Amnesty International Reading Group
- Anderson Baptist Church
- Andrew Simpson Watersports Centre – Reading
- Anywaa Survival Organisation
- ARC (Young People’s Information and Counselling Service)
- Arcade
- Argyle Community Church
- Armour Road Residents’ Association
- Army Cadet Force – 8 Platoon Reading REME
- Art Beyond Belief
- Arthritis Care
- Arthritis Matters
- Arthur Hill – Save Our Swimming SOS
- Artworks Creative Communities
- ASD Family Help
- ASPIRE2
- Association of Community Organisations for Reform Now (ACORN)
- Association of Reading Malayalees (ARMS)
- Association of Sri Lankan Muslims (ASLAM)
- AutAngel
- Autism at Kingwood
- Autism Berkshire
- Autistic Pride Reading
- Auto Skills (Reading) CIC
- Avanti Cycling CIC
