LAWYER PROFILE
Simon Firth

Simon Firth

Global 2026

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About

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Global

Practice Areas

Simon Firth is the leading authority on derivatives, specialising in the structuring and documentation of derivatives transactions and advising about issues arising in relation to derivatives and the financial markets generally.

Simon often advises market participants about issues arising in the credit derivatives market and conducted the independent review of the ISDA Credit Derivatives Determinations Committee.

Simon is also the author of Firth on Derivatives Law and Practice, the leading textbook on English derivatives law, frequently cited in the courts and has been followed in several important derivatives cases.

Simon also has extensive experience in advising about the interpretation of the ISDA Master Agreement and other standard form documentation and many of his opinions have been relied on by the market generally.

Professional Memberships

Simon is a member of the financial markets law committee and a Visiting Professor of the University of Law.

Publications

Firth on Derivatives Law and Practice, Sweet & Maxwell (looseleaf), the leading text book on English derivatives law; and

“The English Law Treatment of Lehman’s Derivatives Positions”, in Bank Failure: Lessons from Lehman Brothers, Oxford University Press, March 2017

Chambers Review

Provided by Chambers

Chambers Global Guide

Capital Markets: Derivatives - UK

Senior Statesperson
Senior Statespeople

Individual Editorial
Simon Firth is an outstanding derivatives practitioner with capabilities in all aspects of the market, from drafting documentation to counselling clients on the impact of regulatory developments. He is a thought leader whose advice on market developments is sought by trade organisations, most notably ISDA.

Strengths

Provided by Chambers

  • We go to Simon for any firsts we're looking at doing.

    Capital Markets: DerivativesChambers Global Guide
  • Simon Firth is a pre-eminent figure in the market.

    Capital Markets: DerivativesChambers Global Guide

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