Kieron Boyle is the Chief Executive of the Impact Investing Institute, the UK’s national body for impact investing. Its mission is to make capital markets fairer for people and for the planet.  

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 transformed its £1 billion investment arm into one of Europe's leading responsible investors. 

Kieron was formerly the UK government's chief advisor on impact investment. He started his career at the Boston Consulting Group. 

Kieron is a Governor of the Southbank Centre, a Trustee of the Design Council, and the Chair of the Long-term Investors in People’s Health programme, a $7 trillion global alliance of institutional investors.