Rosanna Connolly

ROSANNA CONNOLLY focuses on EU and UK competition law issues.

Rosanna’s experience includes merger control, cartel investigations, compliance programs, distribution practices, information exchanges, joint ventures, market studies, abuse of dominance cases, litigation and EU state aid matters. She has been involved in cases before the European Commission, the European Courts, and national competition authorities in the UK and other major jurisdictions around the world.

Rosanna has advised clients in a range of business and industry sectors such as aerospace, agribusiness, e-commerce, financial services, FMCG, IT, medical devices, metals, pharmaceuticals, retail manufacturing, sports and telecommunications.

As in the previous editions, Legal 500 UK 2025 recommends Rosanna for EU and Competition law. In a previous edition, clients noted how she combines “strong technical skills and great client service.”

Rosanna trained as a solicitor in Sidley’s London office, where she gained a broad grounding in EU and UK competition law, along with global finance, tax and real estate experience. She was seconded to our Brussels office during 2009, and more recently she was seconded to the UK’s Financial Conduct Authority where she gained valuable experience of market studies.

Recent examples of Rosanna’s work include representing:

• RenaissanceRe in its US$2.985 billion acquisition of Validus Re from AIG.
• KKR on its majority acquisition of Biosynth Carbosynth, a Swiss life sciences reagents and custom synthesis and manufacturing services company.
• Gallagher, a global insurance brokerage, risk management and consulting services firm, in its acquisition of the treaty reinsurance brokerage operations of Willis Towers Watson for US$3.25 billion.
• Mavenir in connection with a US$500 million private placement by Koch Strategic Platforms, a subsidiary of Koch Investments Group.
• KKR on its investment in Feedzai, a leading cloud-based financial risk management platform.
• KKR on its investment in Nordic Bioscience, a Danish biomarker development company.
• Regal Rexnord in its US$4.95 billion acquisition of Altra Industrial Motion.
• Regal Beloit Corporation in its US$9.1 billion combination with the Process & Motion Control (PMC) Business of Rexnord Corporation.
• Cubic Corporation in its acquisition by Veritas Capital and Evergreen Coast Capital for an enterprise value of US$2.8 billion.
• Arvelle Therapeutics, a Swiss-based biopharmaceutical company, on its sale to Angelini Pharma for a total cash consideration of up to US$960 million.
• Summit Partners on its €50 million investment in Solactive AG, a technology-enabled provider of indices and index solutions to the global financial services industry.
• KKR on its acquisition of Argenta, a leading animal pharmaceutical research and manufacturing company.
• Affiliates of Siris Capital Group, LLC and Pulse Secure, LLC in the sale of Pulse Secure, LLC to Ivanti, Inc.
• TowerBrook Capital Partners in its sale of and re-investment in Independent Clinical Services Group to Onex Corporation.
• Summit Partners on its investment in Appway.
• Anixter International Inc. in its acquisition by an affiliate of Clayton, Dubilier & Rice (CD&R) in an all cash transaction for US$3.8 billion.
• Vector Capital Corporation, a leading technology-focused private equity firm, in its sale of portfolio company Corel Corporation to KKR.
• eBay Inc. on its acquisition of Motors.co.uk from Cox Automotive Relation Solutions.
• PT Medco Energi Internasional Tbk on the takeover offer by a wholly owned subsidiary for Ophir Energy plc.
• Cincinnati Financial Corporation on its acquisition of MSP Underwriting at Lloyd’s from Munich Re.
• MidEuropa Partners in connection with its sale of Alpha Medical to Apax Partners.
• H.I.G. Europe on its disposal of the Zmarta Group, the leading fintech marketplace in Northern Europe, to Bauer Media Group.

• Law Society of England and Wales Competition Section