Mathys & Squire appoints Claire Breheny as Head of Trade Marks

Intellectual property law firm Mathys & Squire is delighted to announce the appointment of senior trademark attorney Claire Breheny as their new Head of Trade Marks.

Joining from Stobbs, where she served as an IA Director and Head of Support, Breheny has nearly two decades of experience working across trademarks, registered and unregistered designs, copyright, and cross-border portfolio management and enforcement.

Recognized in leading industry rankings such as the World Trademark Review 1000, Legal 500, World Intellectual Property Review Leaders, and Thomson Reuters’ Stand-out Lawyers 2024 and 2025, Breheny has consistently been acknowledged for her expertise, and she is widely regarded as being at the top of her profession, both by peers and clients.

Breheny is also a member of the Intellectual Property Regulation Board’s Joint Disciplinary Panel, reflecting her status as a trusted figure in the profession.

Breheny is known for her strategic insight and ability to manage complex multi-jurisdictional disputes, including strategic use of litigation where needed and leading global settlement negotiations for her clients. She has worked extensively with clients with a worldwide presence and specializes in acting for UK brands with international portfolios and US clients targeting UK and EU markets.

Gary Johnston, Partner at Mathys & Squire, says: “We are progressing our strategy to further develop and grow our trademark capabilities to attract more top-tier clients and enhance our reputation as a leading player in the IP legal space. Claire’s appointment is the next big step in this process.”

Breheny says: “I am delighted to join Mathys & Squire at an exciting time for the firm. I bring a wealth of experience advising on global trademark portfolios, managing complex multi-jurisdictional disputes, and developing commercially focused IP strategies.

“I am looking forward to helping strengthen the firm’s reputation in the trademark space, growing the team, and deepening relationships with clients across key international markets.”

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