LAWYER PROFILE
Gemma Barrett

Gemma Barrett

UK 2026

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Ranked in 2 practice areas

About

Provided by A&O Shearman

Practice Areas

Gemma is an experienced and trusted advisor for some of the world’s leading life sciences and chemical companies. She has more than ten years’ experience advising clients in patent litigation matters before the English Courts and providing strategic advice in relation to complex, multi-jurisdictional patent portfolios. Her advice is technically excellent but also takes into account wider commercial implications.

Gemma's stellar academic background in biochemistry underscores her proficiency in navigating disputes spanning small molecule pharmaceuticals, molecular diagnostics, biologics, antibodies, antibody technology and industrial chemical processes. Her litigation expertise includes securing preliminary injunctions, advising on global cross-border litigation, and coordinating worldwide litigation, working closely with multi-disciplinary teams in the defence and enforcement of patent portfolios. Gemma has developed innovative and successful strategies, often combining patent and regulatory law, to assist pharmaceutical companies in the enforcement of their rights.

Gemma has a wealth of experience in domestic and international arbitrations, particularly in technical domains, managing numerous cases with substantial damages claims. Beyond her legal practice, she actively contributes to industry knowledge through publications, including co-authoring chapters and providing insights into UK and EPO case law for various IP publications.

Chambers Review

Provided by Chambers

Chambers Guide to the Legal Profession

Life Sciences: IP/Patent Litigation - UK-wide

Up-and-coming Individual
Up and Coming

Individual Editorial

Gemma Barrett is recommended for her technical skill and legal acumen with regard to patent litigation concerning pharmaceuticals and biotechnology.

Intellectual Property: Patent Litigation - London (Firms)

Up-and-coming Individual
Up and Coming

Individual Editorial

Gemma Barrett is well-regarded for her expertise in life sciences patent litigation, spanning pharmaceuticals, biotech and medical devices.

Strengths

Provided by Chambers

  • Gemma is great to work with; she is a good team player and is experienced and hard-working.

    Life Sciences: IP/Patent LitigationChambers Guide to the Legal Profession
  • Gemma is very practical and thinks very strategically; she is able to anticipate what could happen.

    Life Sciences: IP/Patent LitigationChambers Guide to the Legal Profession
  • Gemma Barrett is outstanding.

    Intellectual Property: Patent LitigationChambers Guide to the Legal Profession
  • Gemma Barrett is very capable, bright and easy to work with.

    Intellectual Property: Patent LitigationChambers Guide to the Legal Profession

Ranked Individuals at A&O Shearman (143)

London (Firms)

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