Simon Paul Dingemans (born April 1963) is an English former banker and businessman. Until May 2019 he was chief financial officer at GlaxoSmithKline. In July 2019 he was appointed chair of the Financial Reporting Council, and will lead its transition into the Audit, Reporting and Governance Authority.
Dingemans spent 25 years at Goldman Sachs, becoming head of European mergers and acquisitions, and overseeing £411 billion ($500 billion) of deals, including Vodafone's £112bn merger with Mannesmann in 2000, the private equity takeover of Alliance Boots, and Novartis's $28.1bn (£18.2bn) takeover of Alcon.
In 2011, he joined GlaxoSmithKline as CFO and served as a member of the main board before stepping down in May 2019. During his eight years at GSK, he oversaw extensive restructuring and re-shaping of the group. In July 2019 Business Secretary Greg Clark announced that Dingemans had been appointed as the new chair of the Financial Reporting Council, and would lead its transition into the Audit, Reporting and Governance Authority.
Dingemans was chairman of the Hundred Group of finance directors between 2014 and 2016. He was appointed a trustee of the Donmar Warehouse theatre in 2018, having previously done theatre production at the Oxford Playhouse and also supported the Royal National Theatre.