Mark is an intellectual property litigator with over 20 years’ experience, advising on a wide range of cross-border, contentious matters.  

Mark has particular expertise in multi-jurisdictional patent disputes, as well as in patent licensing and trade secrets disputes, advising clients primarily from the life sciences, technology and financial services sectors.

Mark has a technical background (BEng (Hons) in Electronic Engineering), allowing him to take on the most complex cases whilst delivering strategic and commercial advice to clients.  Mark is ranked as a Leading Individual by Legal 500 (Intellectual Property: Patents), as well as by other major directories.  In the area of trade secrets, Mark is a member of the AIPPI Standing Committee on Trade Secrets and chairs the trade secrets sub-committee of a major UK industry association.


Representative matters

A multinational technology corporation on Conversant’s claim for a declaration that it has offered fair, reasonable and non-discriminatory (FRAND) terms in respect of its standard essential patent (SEP) portfolio.

Pfizer company, Warner-Lambert, on its ground-breaking action to enforce its second medical use patent for its blockbuster neuropathic pain medication, Lyrica (pregabalin), against Actavis and a large number of generic companies in the UK, as well as coordinating proceedings in France and Germany.

A leading financial services entity on parallel civil and criminal proceedings relating to the theft of high-value trade secrets. Urgent interim injunctions were obtained in multiple countries within 24 hours in order to contain the trade secrets breach. The case led to extradition proceedings and a successful prosecution on charges of computer misuse and fraud.

Leadership Positions And Professional Affiliations

  • Member, AIPPI
  • Member, AIPLA
  • Associate Member, CIPA
[Mark] Ridgway is hailed as ‘one of the best patent litigation tacticians in London'.
IAM Patent 1000 UK 2022
Mark Ridgway is an outstanding and sought-after patent litigator who is simply at the top of his game.
Chambers UK 2023: Intellectual Property



Admitted as solicitor, England and Wales, 2004


BEng, Electronics Engineering, The University of Nottingham, 2000

Diploma, Law, 2001 Diploma, 2002


A&O Shearman was formed on May 1, 2024 by the combination of Shearman & Sterling LLP and Allen & Overy LLP and their respective affiliates (the legacy firms). Any matters referred to above may include matters undertaken by one or more of the legacy firms rather than A&O Shearman.