Ryan Williams joins Cornerstone Research as principal in London
Cornerstone Research has welcomed a new principal expert witness joining its London office. Ryan Williams brings a cross-disciplinary lens to a wide range of economic, financial, and technology issues.
“I’m delighted to be joining Cornerstone Research,” said Williams. “Many of the most important valuation and damages questions sit at the intersection of economics, regulation, and market reality, and I have spent my career on all three. Working across these fields has trained me to see an issue from every side, and I look forward to bringing that perspective and experience to Cornerstone’s clients on their most significant challenges.”
Founded in 1989, Cornerstone Research an economic and financial consulting firm, delivering rigorous analytical and disputes solution services across nine offices in the UK, US and EU. Hosting more than 1,000 professionals across its operations, the firm has strengthened its extensive expertise in international arbitration, valuation, regulatory analysis, and competition with the arrival of Williams.
As an expert witness, Williams has valued assets and quantified damages in commercial litigations and international arbitrations involving sovereign governments, multinational corporations, and franchise networks. He has consulted on energy, mining, technology, telecommunications, and utilities matters across Europe, North America, and South America.
As a research fellow at Imperial College Business School’s Centre for Climate Finance and Investment, Williams teaches courses on the valuation of renewable energy and infrastructure investments and publishes on the economics that underpin them. He also serves as a non-executive director of the Regulatory Policy Committee, the independent body that scrutinises regulation for the UK Parliament, where he evaluates the economic and regulatory impact of proposed legislation, with a focus on artificial intelligence.
“Ryan’s range sets him apart,” said Ronnie Barnes, head of Cornerstone’s international arbitration and litigation practice, and co-head of the firm’s valuation, M&A, and bankruptcy practice. “He is an accomplished scholar and educator, a seasoned consultant, a proven expert witness, and a recognised authority within the UK regulatory system. This rare combination of perspectives offers our clients not only rigorous analysis, but also strategic clarity when navigating their most consequential matters.”

