Nissim Massarano advises in all aspects of EU and UK competition law. Nissim advises companies on the merger control aspects of M&A transactions, cartel and abuse of market power investigations, appeals to CMA decisions, the application of foreign investment and national security regimes, UK subsidy control and State aid, market studies and investigations, commercial arrangements, and competition law compliance. Nissim advises clients across a wide range of industries, with a focus on the healthcare, life sciences & chemicals, consumer goods & retail, and energy & infrastructure sectors.
Unilever on the $45bn combination of Unilever Foods with McCormick
Tele2 on its unconditional Phase II merger clearance of its combination of Tele2 Netherlands with T-Mobile Netherlands, the Dutch subsidiary of Deutsche Telekom
BlackRock on its US$12.5 billion acquisition of Global Infrastructure Partners
Mondelēz International on the settlement of the investigation by the European Commission into cross border sales restrictions in Europe concerning chocolate, biscuits and coffee
A private equity client in relation to allegations of anticompetitive agreements and abuse of dominance of a former subsidiary active in the pharmaceutical sector and subsequent appeals
A private equity client on successfully defending an investigation in relation to disputed parental liability for an alleged anticompetitive agreement of a former subsidiary active in the pharmaceutical sector
Allwyn on its successful intervention before the Competition Appeal Tribunal on Northern & Shell’s subsidy control challenge to the Gambling Commission
Mondelēz on the merger control aspects of its acquisition of Chipita
Sizewell C on its development and financing of the Sizewell C New Nuclear Project in the UK
Dye & Durham on the UK CMA's Phase II investigation into its acquisition of TM Group
CVC and Cinven on the sale of NewDay's portfolio of consumer credit receivables to private credit funds and accounts managed by KKR
Cinven on its acquisition on Smart Communications
WT Microelectronics on its US$3.8 billion acquisition of Future Electronics, a semiconductor distributor
University of Oxford, Mansfield College (BCL) 2015
Joined Clifford Chance 2016
Admitted as a solicitor in England & Wales 2018
King's College London (MA, EU Competition Law) 2021
Awards and citations
Nissim Massarano is also a rising star in this space and will be a big name in the market in years to come.
Legal 500 UK 2026 – Competition Litigation
Nissim Massarano is extremely smart, deeply versed in competition law, and all over the detail of the most complex case.
Legal 500 UK 2025 – Competition Litigation
Nissim Massarano is a first-rate competition lawyer; his knowledge of competition law is encyclopaedic, his analysis is great, and he is always across the detail. As counsel, if you want a question answered, Nissim will have the answer.
Legal 500 UK 2026 – Life sciences and healthcare
Nissim Massarano is likewise extremely impressive - an encyclopaedic knowledge of EU competition law, which he brings to bear for clients in this sector.
Legal 500 UK 2026 – Life sciences and healthcare
