Hanno Kaiser advises clients on transactions and antitrust investigations with global scope, particularly involving digital platforms and their underlying hardware technology stack. Mr. Kaiser also advises on the emerging global framework of AI regulation.

Mr. Kaiser brings a global perspective and technological expertise at the intersection of antitrust, AI, privacy, and intellectual property to help clients obtain required approvals and navigate matters involving:

  • M&A transactions
  • Joint ventures
  • Standard setting and similar cooperative industry efforts
  • Government investigations in the US and Europe under antitrust or AI regulations (payments, social media, messaging, e-commerce, search, ad tech, cloud, digital and analog semiconductors, satellite networking infrastructure)
  • Strategic advice on antitrust and AI issues (blockchain, virtual reality, ad tech)

Mr. Kaiser understands the technologies that drive his clients’ businesses and the markets in which they operate, making him a trusted advisor to his clients’ management.

Mr. Kaiser has represented clients before the US FTC and DOJ, the European Commission, the German Federal Cartel Office, the Korean Fair Trading Commission (KFTC), China’s State Administration for Market Regulation (SAMR), and other agencies around the world, as well as in civil antitrust litigation.

He serves on the firm’s Pro Bono Committee and has previously served on its Initiatives Committee and Training and Career Enhancement Committee.

A recognized thought leader, Mr. Kaiser frequently speaks on antitrust and technology topics. Before moving to San Diego, he taught technology antitrust at the UC Berkeley School of Law.

Mr. Kaiser’s recent matters include advising:

  • Meta on a wide range of global antitrust issues
  • Airbnb on a wide range of global antitrust issues
  • Digital Realty Trust on US and European hyperscale datacenter transactions
  • Segment.io in its US$3.2 billion acquisition by Twilio
  • A leading global payments provider in a German abuse of dominance investigation
  • A leading software company in US civil litigation over algorithmic pricing claims
  • A leading NFT ecosystem participant on creator royalty implementations
  • A global content streaming technology platform on AI governance issues















Bar Qualification

  • California
  • New York
  • Rechtsanwalt (Germany)


  • Dr. iur., University of Bonn, 1998
  • LLM, University of California, Davis School of Law, 1998
  • Second German State Exam, Duesseldorf, 1996
  • First German State Exam, University of Bayreuth, 1994

Languages Spoken

  • English
  • German