At Social Investment Business, we use finance to build stronger communities and a fairer society.
We work with charities and social enterprises across the UK. Through a mix of funding and practical, tailored support, we back the organisations that make up the social economy – those tackling inequality, improving lives, and driving positive change every day. Our role is to provide the support, flexibility, and trusted partnership they need to thrive.
As one of the UK’s largest social investors, we’ve provided finance and support to thousands of charities and social enterprises, while using our expertise to research, innovate and advocate for the sector. Since 2002, we’ve deployed and managed over £800 million in loans and grants, reaching more than 6,000 organisations across the UK.
We began as the Adventure Capital Fund (ACF) – a pioneering initiative backed by the UK Government to explore how social investment could build sustainable community enterprises.
The pilot grew and by 2009, we became the Social Investment Business Group, bringing together ACF (as a parent charity) and Social Investment Business as our fund manager.
In 2011, the Communitybuilders Fund was transferred to the group as a permanent endowment to continue supporting local community projects. Three years later, we became the Social Investment Business Foundation, aligning our name with our mission and strengthening our identity.
In 2025 we launched an ambitious new five-year strategy, with a sharper focus on areas where social investment can make a huge difference: Green Transition, Infrastructure, and Services.