Mr Leonidas Theodosiou > Morgan, Lewis & Bockius UK LLP > London, England > Lawyer Profile
Morgan, Lewis & Bockius UK LLP Offices

CONDOR HOUSE
5-10 ST PAUL'S CHURCHYARD
LONDON
EC4M 8AL
England
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Mr Leonidas Theodosiou

Work Department
Antitrust & Competition
Position
Leonidas Theodosiou advises on competition law and litigation. He is highly recommended by leading directories. Prior to joining Morgan Lewis, Leo spent several years practicing with a Magic Circle law firm, resident in Brussels. Leo is one of few lawyers globally who are fully qualified to practice law in the United Kingdom, European Union, and United States. For more information, view Leonidas’ biography at https://www.morganlewis.com/bios/leonidastheodosiouLeonidas
Career
England and Wales (Solicitor)
Brussels
New York
General Court and Court of Justice of the European Union
Greece: Courts of Appeal
Greece: Supreme Court
Languages
English
Memberships
Fellow (Elected), American Bar Foundation (2024–present)
Fulbright Fellow, US Department of State (2012–2013)
Education
Harvard Law School, 2013, LL.M., Fulbright Fellow, US Department of State
University of Cambridge, Trinity Hall, 2012, LL.M.
Aristotle University of Thessaloniki, Greece, 2011, LL.B.
Lawyer Rankings
London > Corporate and commercial > EU and competition
(Next Generation Partners)The competition group at Morgan, Lewis & Bockius UK LLP is highly regarded for its ‘wide range of experience across jurisdictions’ on both contentious and non-contentious competition issues. The team has established a strong reputation in the pharmaceutical sector, frequently representing prominent corporations in numerous CMA investigations. Practice head Frances Murphy is trusted by clients to manage their complex, high-profile cases and is instrumental in the team’s involvement in significant matters. Leonidas Theodosiou, praised for his ‘thoughtful, pragmatic, client-centric approach‘, boasts capabilities in UK, EU, and US competition law.
London > Dispute resolution > Competition litigation
(Next Generation Partners)Morgan, Lewis & Bockius UK LLP is highly regarded for its competition litigation prowess across the life sciences, retail, technology, and private equity sectors. The team is regularly entrusted to provide critical defences to antitrust investigations and dawn raids. Practice head Frances Murphy is responsible for major victories in pharmaceutical investigations and cases concerning abuse of dominance and pay for delay disputes. Complex abuse of dominance investigations and high-stakes merger disputes are both regular facets of Omar Shah‘s practice. Leonidas Theodosiou is qualified to practice US, UK, and EU antitrust law, bolstering the team’s cross-border capabilities. Joanna Christoforou left the firm in May 2024.
Lawyer Rankings
- Next Generation Partners London > Dispute resolution > Competition litigation
- Next Generation Partners London > Corporate and commercial > EU and competition
- Competition litigation London > Dispute resolution
- EU and competition London > Corporate and commercial
Top Tier Firm Rankings
- TMT (technology, media and telecoms) > Intellectual property: patents (contentious and non-contentious)
- TMT (technology, media and telecoms) > Intellectual property: patents (contentious and non-contentious)
Firm Rankings
- Industry focus > Emerging markets
- Transport > Aviation
- Dispute resolution > Competition litigation
- Finance > Debt capital markets
- Employment > Employers
- TMT (technology, media and telecoms) > IT and telecoms
- Corporate and commercial > M&A: Lower Mid-Market Deals, £100m-£750m
- Projects, energy and natural resources > Oil and gas
- Risk advisory > Regulatory investigations and corporate crime (advice to corporates)
- Finance > Securitisation
- Corporate and commercial > Financial services: contentious
- Employment > Immigration
- TMT (technology, media and telecoms) > Intellectual property: trade marks, copyright and design
- Industry focus > Life sciences and healthcare
- Corporate and commercial > Private equity: transactions - mid-market deals (up to £500m)
- Dispute resolution > Banking litigation: investment and retail
- Corporate and commercial > Corporate tax
- Corporate and commercial > EU and competition
- Corporate and commercial > Financial services: non-contentious/regulatory
- Dispute resolution > International arbitration
- Investment fund formation and management > Private funds
- Finance > Transport finance and leasing
- Dispute resolution > Commercial litigation: premium
- Risk advisory > Data protection, privacy and cybersecurity
- Projects, energy and natural resources > Renewables