The Senior Team

STUART GILHAM

Stuart is a Managing Director of Parmentier Arthur and re-joined in February 2019 following five years in the Valuation, Modelling and Economics (“VME”) team at EY London where he was an Assistant Director (Senior Manager). During his time at EY Stuart undertook a large number of valuations of shares, businesses, earn outs, deferred consideration, intellectual property and carried interests for income tax, capital gains tax and Inheritance Tax Purposes.

Stuart has been a member of the Association of Taxation Technicians (ATT) since 2004 and is also an associate member of the Society of Share and Business Valuers (SSBV), a member of the ICAEW Corporate Finance Faculty and a member of the Royal Institute of Chartered Surveyors (RICS) where he is undertaking the professional experience route to chartered surveyor status.

ROD MASON (ACA, CTA)

Rod is a Managing Director of Parmentier Arthur, joining after thirteen years at EY Manchester where he was an Assistant Director in the Reward team and then Valuation, Modelling and Economics (“VME”) team. Prior to that he worked at Andersen and Deloitte. Rod’s specialism is around the valuation of management incentive plans and wider employee share plans, including negotiations with SAV. He also has significant experience of valuations of shares, businesses, earn outs, deferred consideration and carried interests for income tax, capital gains tax and inheritance tax purposes.

Rod is a Chartered Accountant and a Chartered Tax Advisor.

MIKE READE

Mike is a Managing Director at Parmentier Arthur, having joined in June 2025 after 14 years at EY where he was a Partner leading the Management Tax and Transactions practice. Prior to EY, Mike began his career at KPMG in the Private Client team, where he qualified as a Chartered Tax Adviser. 

With almost two decades of experience advising private equity investors, portfolio companies, and owner-managed businesses, Mike has developed deep expertise in the commercial, tax and valuation considerations connected with equity-based incentive arrangements and the broader transaction lifecycle. Throughout his Big Four career, he has advised on hundreds of transactions and share-related tax matters, giving him unique insight into the tax valuation challenges faced by clients. 

At Parmentier Arthur, Mike focuses on the valuation of shares in private companies for UK tax purposes, working closely with clients and their tax advisers to deliver clear, robust valuation support. 

STEVE THOMAS

Steve joined Parmentier Arthur as a Director in November 2025 following his retirement from HMRC Shares and Assets Valuation (“SAV”) in September 2025, where he held the role of Assistant Director leading the Litigation Team. During his distinguished 40-year public sector career, Steve played a pivotal role in shaping HMRC’s approach to valuation across a wide range of asset classes from private company shares to intangible assets.

After beginning his career in the Inland Revenue in 1985, Steve spent seven years in the Inspector of Taxes office, gaining a grounding across different taxes, before first joining SAV in 1992. Over the decades, he worked in several specialist areas within the office, including the Intellectual Property and Special Cases Team, and was instrumental in developing HMRC’s policy and practice in complex valuation matters. As Assistant Director, he advised and oversaw some of the department’s most experienced valuers, led HMRC’s position in several contentious policy areas, and acted as an expert witness across different valuation disciplines.

Steve was among the first SAV valuers to become a full Member of the Royal Institution of Chartered Surveyors (“RICS”), completing RICS’ Assessment of Professional Competence in the Valuation of Businesses and Intangible Assets. His expertise has also been recognised internationally, advising regulatory organisations and overseas administrations and speaking regularly at valuation conferences and seminars.

Steve brings exceptional and unique experience to Parmentier Arthur, in particular his invaluable and unrivalled insight into valuation issues from an HMRC perspective.

PETER WYATT (FCA)

Peter is a senior consultant with Parmentier Arthur and a Chartered Accountant. He qualified with Coopers & Lybrand (now PricewaterhouseCoopers). Moving to Canada with Coopers, he joined a client company (a quoted subsidiary of Rio Tinto plc) where as Vice-President Corporate Development he was responsible for group strategic planning and the acquisition and sale of subsidiary companies.

He joined Parmentier Arthur in 1990 and focuses on commercial and litigation support valuations and the preparation of business plans and financial forecasting models.