Dr. Alexander Stefan Rieger is widely recognized for advising clients on complex mergers and acquisitions in the international infrastructure sector. The Legal 500 ranks him in 2022 and 2023 as one of the leading partners of the next generation for M&A in Germany.

Mr. Rieger’s clients include infrastructure funds, pension funds, insurances, private equity investors, and corporates from around the globe. Mr. Rieger has led numerous high-profile transactions in a range of sectors, including digital infrastructure in particular. 

By utilizing his background as a straight-forward infrastructure lawyer, Mr. Rieger adds value rarely available in the market at the interface between infrastructure and M&A. What Mr. Rieger does best: understanding complex business issues and translating them into legal or commercial solutions. In advising his clients, Mr. Rieger emphasises practicality, striving to achieve clients’ business objectives.

Mr. Rieger’s representative experience includes advising:

  • DWS Group on its major investment in Deutsche GigaNetz*

  • Versicherungskammer Group on the acquisition of Ferngas Group*

  • iCON Infrastructure on the acquisition of Strategic Fiber Networks Group*

  • DTCP on its major investment in maincubes*

  • UBS Asset Management on the acquisition of fiber businesses

    • LuneCom*

    • sewikom*

  • DIF Capital Partners on their investment in ruhrfibre, a platform to build out a fiber network in the city of Essen*

  • AtlasEdge on its acquisition of Datacenter One*

  • NorthC on the acquisitions of

    • IP Exchange*

    • Netrics Group*

  • InfraRed Capital partners on its investment in the German B247 road project*

  • InfraVia Capital Partners and Egis Capital Partners on the disposal of their shares in the German A8 motorway*

  • Greenvolt on its investment in solar developer MaxSolar*

  • IST3 Infrastruktur Global jointly with Allianz Capital Partners in a consortium with OMERS Infrastructure and AXA Real Assets on the successful acquisition of a 49.99% stake in the “fibre-to-the-home” (SFR FTTH) business of Altice France*

*Matter handled prior to joining Latham 

Bar Qualification

  • Rechtsanwalt (Germany)


  • Dr. iur., Goethe University, Frankfurt, 2010
  • Second State Exam, Higher Regional Court, Frankfurt, 2010
  • First State Exam, Goethe University, Frankfurt, 2006