January 20, 2021

Volume XI, Number 20

Tatiana Siakka

Tatiana Siakka is a competition law specialist with wide-ranging experience in both contentious and non-contentious matters. She advises clients on all aspects of EU and UK competition law, including cartel defence and antitrust investigations, merger control, market dominance and state aid, and has successfully represented clients before the European Commission and the Competition and Markets Authority (CMA).

In addition, Tatiana has extensive experience in competition litigation in the EU and UK courts, including the High Court, Competition Appeal Tribunal and the Court of Appeal, having acted in proceedings for both claimants and defendants. She is currently representing a major Polish motorway company in state aid proceedings before the General Court of the EU.

Tatiana has experience in complex vertical distribution matters, having advised numerous manufacturers of branded goods in a variety of sectors, including leading consumer electronics and fashion brands, on designing and implementing effective distribution policies across Europe with a particular focus on e-commerce, including advice on parallel trade and grey market imports. She regularly develops tailored compliance programmes, carries out internal audits and delivers training to clients on their competition law obligations.

Prior to joining us, Tatiana worked at leading international law firms in London, advising clients across the spectrum of EU and UK competition law and representing clients in high-value competition litigation proceedings in the UK courts, including having acted in two of the largest damages claims in the UK – the interchange fees and air cargo litigation.

Tatiana has spent time in-house as legal counsel of a leading home automation company, where she focused primarily on establishing and expanding the company’s multichannel distribution network in Europe, in addition to advising on all day-to-day competition issues.

Tatiana publishes frequently on competition law developments and is a contributor to Squire Patton Boggs' Triage Health Law blog. She has a particular interest in the intersection between competition and intellectual property.


BPP Law School, Qualified Lawyer Transfer Scheme, 2014

Universiteit Leiden, LL.M., EU and Competition Law, 2012

Aristotle University of Thessaloniki, LL.B., 2009

Free University of Brussels, Erasmus Scholar, 2007


Articles in the National Law Review database by Tatiana Siakka