Dr. Jan Häller, LL.M.

Primary Focus & Experience

Jan’s practice focuses on advising companies and investors on national and cross-border M&A transactions, joint ventures and all aspects of corporate law. In addition, he advises on the full spectrum of capital markets law and has extensive experience in advising clients across a wide range of industries.

Recognition & Accomplishments

Jan studied law at the University of Heidelberg and holds an LL.M. from the University of Cambridge. Prior to joining Milbank in 2025, Jan was partner at Hengeler Mueller, where he began his career in 2018. He is admitted to the German bar and speaks German and English.

Selected Project Samples

• Advent on its investment in Quantum Systems.
• Advent on its investment in STARK.
• Carlyle on the sale of Flender.
• Carlyle on the acquisition of BASF´s coatings business.
• Allianz, BlackRock, and the T&D consortium on the acquisition of leading European life insurance consolidator Viridium.*
• Deutsche Bahn on the sale of Schenker AG to DSV A/S.*
• Viessmann Group on the sale of its Climate Solutions division to Carrier Global Corporation.*
• Viessmann Generations Group on a co-investment with Armira in European pharmaceutical developer and manufacturer PharOS.*
• Viessmann Generations Group on a co-investment with KKR in renewable energy platform Encavis.*
• Viessmann Generations Group on the acquisition of asset manager Do Investment AG.*
• Viessmann Generations Group on a co-investment with Athos and others in healthcare provider Schülke GmbH.*
• KKR on a minority stake in space and technology company OHB SE.*
• KKR on a co-investment with Vodafone in Vantage Towers.*
• KKR on the acquisition of a majority stake in cloud infrastructure and hosting provider Contabo.*
• NavVis bei Series-D-Finanzierungsrunde über $85 Millionen.
• CMBlu Energy on several infrastructure investments (including joint ventures) as well as financing rounds and corporate matters.*
• IONOS Group SE on its IPO, including M&A and corporate law aspects.*
• Attestor and Interritus Limited on the sale of Austrian Kommunalkredit AG to Altor Group.*
• Deutsche Börse AG on the takeover offer for SimCorp A/S and the intended combination of Qontigo and ISS, creating a new Investment Management Solutions segment.*
• Münchener Hypothekenbank eG on the acquisition of M.M. Warburg & Co. Hypothekenbank Aktiengesellschaft.*
• Ralph Dommermuth on the increase of his stake in United Internet AG.*
• United Internet / 1&1 on the development of the 5G mobile network with Rakuten as general contractor.*
• FMS-WM on the sale of DEPFA BANK plc to BAWAG.*
• United Internet on the takeover offer for Tele Columbus together with Morgan Stanley Infrastructure Partners.*
• Aareal on the sale of a minority stake in Aareon to Advent International.*
• Dr. August Oetker KG on the sale of Bankhaus Lampe to Fosun International (Hauck Aufhäuser).*
• Commerzbank on merger discussions with Deutsche Bank.*
• Aareal Bank on the acquisition of Düsseldorfer Hypothekenbank.* 

*Matter completed prior to joining Milbank.

Jan has contributed to numerous publications on corporate law matters, including:

• “Corporate Agreements and Business Valuation”, K. Schmidt/Lutter, Commentary on the German Stock Corporation Act (AktG), 5th edition 2024
• “Company Valuation and Market Value” (co-author), Fleischer/Hüttemann (eds.), Legal Handbook on Company Valuation, 3rd edition 2024
• “Capital Increases in Kind and Exclusion of Pre-Emptive Rights” (co-author), Hirte/Mülbert/Roth, Commentary on the German Stock Corporation Act (AktG), 5th edition 2024
• “Capital Markets Law and Corporate Restructuring in Insolvency” (doctoral thesis), 2016, awarded the Fritz Grunebaum Prize by the Heidelberg University Foundation