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Kieron Boyle to join from Guy’s & St Thomas’ Foundation to lead the Institute’s efforts to champion impact investing

London, Thursday 2 March – The Impact Investing Institute (“the Institute”) is pleased to announce the appointment of Kieron Boyle as Chief Executive Officer. Kieron’s appointment follows an extensive selection process that attracted significant interest among applicants, a testament to the Institute’s strong reputation as an advocate for impact investing in the UK and internationally, which was built over the last three years.

Kieron will lead the Institute’s efforts to champion impact investing at a crucial time when the market is moving from the fringes to mainstream, and with social inequality and climate change at the forefront of the minds of investors and policymakers.

Kieron joins the Institute following seven years as Chief Executive of Guy’s & St Thomas’ Foundation, one of the world’s oldest foundations, and itself a pioneer in incorporating impact investment into the investment strategy of its £1 billion endowment. At Guy’s & St Thomas’, Kieron has led some of the UK’s most innovative and impactful alliances to reduce health inequalities.

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, the world’s first wholesale social investor, and putting impact investing on the agenda of the G8 during the UK’s presidency, in particular through the creation of the Social Impact Investment Taskforce. 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, 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. He is also a World Economic Forum Young Global Leader.
Dame Elizabeth Corley, Chair, Impact Investing Institute, said:
“I am delighted to welcome Kieron Boyle as Chief Executive of the Impact Investing Institute. Kieron brings a long and exemplary record of advocacy, innovation and achievement in the area of impact investing. He is ideally skilled to realise the Institute’s aspirations and take its accomplishments to the next level building on Sarah Gordon’s exceptional legacy as founding CEO. Kieron is widely recognised as a key and influential figure in the global impact investing world and we are excited that he is joining us.”
Kieron Boyle, Incoming Chief Executive, Impact Investing Institute, said:
“Having spent over a decade in the field of impact investing, I am incredibly excited to lead the Institute at such an important time. The world faces intense economic, social and environmental challenges, and I have seen first-hand how capital markets can be one of our most effective levers of change. Sarah Gordon has done a fantastic job in establishing the Institute as a leading voice in the impact investing movement and I look forward to working with Elizabeth, the team and our very many partners in taking that impact to the next level.”

Kieron joins the Institute on 15 May 2023. Until then, senior Institute executives Bella Landymore and Sarah Teacher continue to serve as Interim Joint Chief Executives. He succeeds Sarah Gordon, who left the Institute at the end of 2022, having built an exceptional legacy as the founding CEO.

About the Impact Investing Institute
The Impact Investing Institute is an independent, non-profit organisation with the goal of making capital markets fairer and work better for people and the planet. Our mission is to accelerate the growth and improve the effectiveness of the impact investing market in the UK and internationally.

The Institute wants to foster thriving capital markets where impact investing plays an essential role within the financial system and investors deploy their capital to address social and environmental challenges, alongside generating a financial return. We also advocate for regulatory and policy environments that support that goal.


For more information, contact: 

Stephanie Dawoud, Communications and Engagement Manager, Impact Investing Institute:, +44 77 49 74 17 93 

In the summer of 2022, our Chair Dame Elizabeth Corley sat down with Kieron Boyle in his capacity as CEO of Guy’s and St. Thomas’ Foundation to speak about impact investing by endowments, and the Foundation’s journey from small beginnings to the biggest impact allocation ever made by a UK foundation.