Claire Jeffs

• T  +32 (0) 2 737 94 14 (Direct line)
• E  claire.jeffs@slaughterandmay.com

• Brussels 
• Square de Meeûs 40, 1000 Brussels, Belgium

Claire was educated at Cambridge and Brussels universities. She joined Slaughter and May in 1998 and became a partner in 2005. She is resident in Brussels.

She has been involved in a large number of high profile merger cases before the UK and EU competition authorities, as well as coordinating merger approvals world-wide.

On the contentious side she has been involved in several cartel and other behavioural cases, including on appeal to the General Court in Luxembourg.

Highlights include advising:

• INEOS, a chemicals company, on the European competition aspects of its styrenics joint venture with BASF SE
• Unilever on its settlement of the European Commission's investigation into the consumer detergents sector
• Google, Inc. in relation to the European Commission's ongoing antitrust investigation into allegations that certain of their business practices in the search and advertising sectors violate European competition rules

She has been named in Global Competition Review’s  "40 under 40", The Lawyer’s  Hot 100 list and Management Today’s  "35 under 35" list of high flying young business women. Claire is also listed as a leading individual in the Competition/European Law section of the 2011 editions of  Chambers Europe and Chambers Global and in 'Competition - Regional Experts' in Chambers Global, 2011.

Claire is fluent in French and Russian and has good German.