Summary
The Social Impact Investors Group (SIIG) is a vibrant and innovative group that exists to support foundations interested in starting or who are currently undertaking social impact investing. SIIG is facilitated by the Association of Charitable Foundations (ACF) and led by a member steering group.
Aims and activities
Aims and questions
Aims and activities
SIIG provides learning sessions, practical resources and networking opportunities. Whether you’ve just made your first investment, are thinking about if it is for you, or you’ve been doing it for years – this group is open to all.
Members contribute through peer learning and collaboration, enabling more fellow foundations to feel skilled and supported to undertake social impact investing. The SIIG Steering Group provides oversight and expertise, with activities co-ordinated by ACF staff.
During 2025, the SIIG is planning:
- 10+ learning sessions for those new to the sector and more experienced
- Market information days - for networking and the chance to learn about investment opportunities
- Introduction to social impact investment sessions featuring investors and investees
- Our popular Impact Investing in the Main Endowment Course with a new bitesize version for trustees – free only to SIIG members
- A regular SIIG e-newsletter with information on events and relevant news
- To represent SIIG members to policy makers and within the wider social investment landscape
Membership fees to join the SIIG are £1,000 per year for ACF members and £1,600 for non-ACF members. There is no extra cost to attend events and no restriction on the number of staff or trustees attending.
SIIG events are listed on the ACF website and can be found by searching 'SIIG' in Events
Important note: Information, communications and/or opinions shared at ACF and SIIG events are not intended, and should not be considered, as investment, tax, financial, or legal advice. Investors must make their own decisions, or seek independent advice.
How to get involved
Membership of the SIIG is open to foundations and other organisations with a charitable or social mission with investible assets. To find out more or to join, please contact Gemma Cartwright at ACF.
Who's involved
Who was involved
The SIIG has been convened by the Association of Charitable Foundations (ACF) since 2018, but has operated informally since 2011.
The SIIG steering group includes representatives from: Esmée Fairbairn Foundation, Barrow Cadbury Trust, City Bridge Foundation, Joseph Rowntree Foundation, Better Society Capital, Church of England, Barnwood Trust, Treebeard Trust and Trust for London
Learning and Resources
The SIIG Diversity, Equity & Inclusion Charter contains concrete actions to improve diversity of thought and representation, ensure equity of opportunity and outcomes, and implement inclusive practice by broadening the range of experiences and perspectives we bring to bear in our processes and decision-making, to ensure better decisions are made.
