Kieron Boyle

About Kieron

Kieron Boyle is the Chief Executive of the Impact Investing Institute, the UK’s national body for impact investing. Its mission is to change capital markets for a fairer, greener economy.  

From 2016 to 2023, Kieron was the Chief Executive of Guy's and St Thomas' Foundation, one of the world's oldest health foundations. Through this period, the foundation developed some of the UK’s most innovative and impactful alliances to reduce health inequalities, as well as transformed its £1 billion investment arm into one of Europe's leading responsible and health impact investors.  

Kieron was an early leader in impact investing, having joined Guy’s & St Thomas’ from the Cabinet Office, where he was Director of Impact Investment and the key architect, starting in 2012, of the UK Government’s strategy to make the UK a global hub for impact investing. That catalytic work included the creation of Big Society Capital; developing the Government Outcomes Lab; and putting impact investing on the agenda of the G8 during the UK’s presidency. 

Before joining the Cabinet Office, Kieron served in No.10 Downing Street, the Department for Business, the Foreign and Commonwealth Office and the Prime Minister’s Strategy Unit. He started his career as a strategy consultant at The Boston Consulting Group in New York.  

Kieron is a Governor of the Southbank Centre, Europe’s largest arts centre; and on the Boards of the Design Council. He chairs LIPH — a multi-trillion dollar global alliance of institutional investors working to improve people's health — and sits on the IPPR cross-party Commission into Health and Prosperity.