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Kate is a partner in the EU, Competition and Regulatory Law Group.  Prior to joining Matheson, Kate worked at a Magic Circle law firm in London.

Kate’s EU competition practice spans the areas of merger control, behavioural competition issues (including abuse of dominance, cartels and other restrictive arrangements), State aid, sectoral regulation and public procurement. As part of Kate’s regulatory practice, she advises clients on compliance with telecommunications, broadcasting and postal regulation as well as representing life sciences companies on regulatory and pricing matters arising during the life cycle of medicinal products.

Kate’s clients are leaders across a broad range of industries and Kate has particular expertise in the communications, Life Sciences and financial services sectors. Kate has advised on numerous notable regulatory processes and court cases. With her extensive experience of regulators and courts at Irish and EU level, clients turn to Kate for expert advice on defending their interests and for practical solutions which achieve their commercial objectives.

Kate contributes articles to leading international legal publications and speaks regularly on EU law issues including as a lecturer on Law Society courses.


Kate McKenna is recommended.
European Legal 500 2020

Kate McKenna is named a next generation partner.
European Legal 500 2020

A client reports that Kate McKenna "has an amazing ability to distil very complex legal advice into comprehensible language." "She is quick to grasp the key issues and is calm and practical," says another source.
Chambers Europe 2020

Kate McKenna is "clear and concise". 
European Legal 500 2019

Kate McKenna is named a next generation lawyer.
European Legal 500 2019

Kate McKenna is "imaginative in the manner that she goes about her work".
Competition / European Law: Chambers Europe 2019 

"Helen and Kate have a deep understanding and insight into the legal legislation and regulatory framework underpinning our industry. Kate and Helen are simply the best advisers in their field – they’re technically excellent, results-driven and a pleasure to work with."
Competition / European Law: Chambers Europe 2019

Kate McKenna is "excellent, she is deeply intelligent".
Competition / European Law: Chambers Europe 2019

Kate McKenna has a "great legal mind, is very pleasant to work with and always adds value".
Competition / European Law: Chambers Europe 2019

"Helen Kelly and Kate McKenna are excellent. Both are world class in their field."
Chambers Europe 2018

"Kate McKenna is phenomenal. She is a highly experienced competition lawyer."
Chambers Europe 2018

ate McKenna is "extremely knowledgeable and technically excellent".
European Legal 500 2018

Kate McKenna has "commercial pragmatism and ability to create a way through a heavily regulated area."
Chambers Europe 2018

Her clients have noted her to be a 'flexible and dedicated' provider of  'tailored advice'
Chambers Europe 2017


Trinity College Dublin (Law Degree)