Katrin Schallenberg's practice focuses on European and French antitrust and merger control. She advises clients across multiple sectors with a focus on tech, energy, and large industrials. Katrin splits her time between Paris and Brussels.
Advised Cisco in relation to all non-US antitrust aspects of its recent USD 28 billion take-over of software company Splunk (EU and several other jurisdictions)
Advised GE on all non-US antitrust aspects relating to the merger of its global aircraft leasing business (GECAS) with AerCap
Advised Airbus, Safran and Tikehau Ace Capital on all EU and international antitrust and FDI aspects in relation to the joint acquisition of a major aerospace part supplier (Aubert & Duval)
Advised Framatome / EDF with all merger control aspect in relation to their acquisition of Rolls Royce’s nuclear business
Advised TotalEnergies in relation to its partnership with Alimentation Couche-Tard in Belgium and Luxembourg and the sale of its retail networks in Germany and the Netherlands
Advised The French investment agency (APE) in the context of its proposed sale of the French ship builder Chantiers d’Atlantique to Italian ship builder Fincantieri and subsequent Phase II merger control investigation by the EU Commission
Advised Shell in the context of acquiring Repsol’s global LNG business, including an EU filing procedure and coordination of several other merger filings across the globe
University of Vienna Law School (Master in Law) 2001
Georgetown University Law Center (LLM) 2002
Admitted as an Attorney-at-Law in New York 2003
Admitted as an avocat in Paris 2005
Joined Clifford Chance 2005
Ecole Nationale d'Administration (Cycle des Hautes Etudes Européennes) 2015
Partner since 2017
Professional
bodies
Board member of the Association des Avocats pratiquant le droit de la concurrence (APDC)
Awards and citations
Katrin Schallenberg is ranked as one of the "Leading partners" for the practice. Legal 500 EMEA 2025, EU, competition and distribution - France
Katrin Schallenberg (Band 4) is noted for her expertise in antitrust matters, including assisting with market inquiries. She is equally well placed to handle the merger control and foreign direct investment aspects of transactions. "Katrin Schallenberg is definitely on the list of people we would go to." "Katrin Schallenberg stands out to me and has been really great from a merger control perspective." Chambers France 2025, Competition/European Law
Katrin Schallenberg is ranked as one of the 'Leading Individuals' for the practice. Legal 500 EMEA 2024, EU, Competition And Distribution - France
Katrin Schallenberg (Band 4) is noted for her expertise in antitrust matters, including assisting with abuse of dominance investigations and market inquiries. She is equally well placed to handle the merger control and foreign direct investment aspects of transactions.
"Katrin Schallenberg is quite pragmatic and tries to find ways to find business solutions."
"Katrin Schallenberg has followed the case very closely and has perfect knowledge of the products and markets at stake."
"She has a clear and detailed overall vision of the matter and she did not hesitate to intervene each time it was necessary with strong arguments. You know you can rely on her."
"Katrin Schallenberg is quick, smart and grasps matters very quickly." Chambers Europe 2024, Competition/European Law - France
Katrin Schallenberg is ranked as one of the 'Leading Individuals' for the practice. Legal 500 EMEA 2023, EU, Competition and Distribution - France
Katrin Schallenberg (Band 4) is noted for her expertise in antitrust matters, including assisting with abuse of dominance investigations and market inquiries. She is equally well placed to handle the merger control and foreign direct investment aspects of transactions. "Her key qualities are her ambitious vision, ability to understand the major issues, concise summaries and speed of understanding."
"Katrin Schallenberg is pragmatic, reactive and an expert in competition law. She is always looking for innovative ways to address the large variety of topics we have to cover and is a pleasure to work with."
"Katrin Schallenberg has a really good relationship with clients, is very responsive and gives pragmatic advice."
"She will not spare energy to fight for her client's best interests and will give macro-level advice." Chambers Europe 2023, EU, Competition/European Law - France
Katrin Schallenberg is ranked as one of the 'Next Generation Partners' for the practice. Legal 500 2022, EU, Competition and Distribution - France
Katrin Schallenberg is noted for her expertise in antitrust, including assisting with abuse of dominance, as well as merger control. One client highlights: "Katrin is a dynamic, talented and business-oriented competition law partner." (Ranked Band 4) Chambers Europe 2022, Competition/European Law - France
Katrin Schallenberg is ranked as "Next Generation Partner". Legal 500 2021, UE, Competition and Distribution - France
Katrin Schallenberg is noted for her expertise in antitrust, including assisting with abuse of dominance, as well as merger control. She is praised for being "technically impeccable, responsive and succinct." Chambers Europe 2021, Competition/European Law - France
Katrin Schallenberg is ranked as "Next Generation Partner."
Legal 500 2020, UE, Competition and Distribution - France
Impressed clients say Katrin Schallenberg "puts herself in our position and is very nice to work with." She advises clients on merger clearance and antitrust investigations. According to sources, Schallenberg is "a true business partner, smart and pragmatic." Chambers Europe 2020, Competition/European Law - France
"Clifford Chance's antitrust practice combines national and European expertise to cover the full gamut of competition matters through the experience of Katrin Schallenberg and David Tayar. The pair jointly head the practice, supported by of counsel Michel Petite. As well as overseeing Europcar's acquisition of Goldcar, the group recently handled Axel Springer's sale of 78.4% of the Aufeminin group to TF1. Schallenberg is currently representing Arkema in a claim against Honeywell on the grounds of European competition law, seeking a worldwide licence to use one of its products; Tayar is assisting Carrefour with its strategic alliance with Tesco covering the joint purchase of own-brand products and the negotiation of services with large international suppliers. Senior associate Emily Xueref-Poviac is also a key contact and is part of the team advising Oracle on a very recent FCA investigation." Legal 500 EMEA 2019, EU Competition & Distribution - France
"Clifford Chance is assisting many leading French and international corporations with the establishment of anti-corruption programmes, including high-profile names in the pharmaceutical, aviation and defence sectors. The 16-lawyer team is also advising several clients on audits by the new French anti-corruption agency, Agence française anticorruption (AFA), and on conducting internal investigations in connection with or independently from government-led investigations. It also offers antitrust compliance advice. Thomas Baudesson, newly promoted partner Charles-Henri Boeringer and Katrin Schallenberg are recommended." Legal 500 EMEA 2019, Compliance - France
Katrin Schallenberg assists clients with a variety of antitrust issues across the automotive, publishing and IT spaces. She is identified by sources as an "excellent lawyer with international experience which is very useful and gives a broader perspective." Chambers Europe 2019, Competition/European Law - France
"Clifford Chance managed to balance the departure of former practice head Patrick Hubert and three of his associates to Orrick Rambaud Martel with the arrival of the ‘exceptional’ David Tayar, who ‘stands well above the rest of the pack’ and joined from Willkie Farr & Gallagher LLP; additionally, Katrin Schallenberg was promoted to the partnership. Along with numerous high-value merger control cases in the pharmaceutical and car rental sectors, the group is representing clients such as Teva, Ingram Micro and Volkswagen in antitrust investigations. Of counsel Michel Petite successfully obtained clearance with remedies in phase two proceedings before the European Commission on behalf of Airbus Safran Launchers with regards to its acquisition of Arianespace and Marie Pacaux is also a key contact." Legal 500 EMEA 2018, EU Competition & Distribution - France
"Clifford Chance advises many leading French and international companies on the setting up of Sapin II anti-corruption programmes. The practice is also assisting several high-profile corporations with internal investigations concerning market abuse, corruption and EU law issues, and advises large companies and financial institutions on Iranian sanctions matters. Pfizer, Pernod Ricard and Club Med are clients. Thomas Baudesson, Katrin Schallenberg and counsel Charles-Henri Boeringer are the key contacts." Legal 500 EMEA 2018, Compliance - France
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