Robert Langdon

Simpson Thacher & Bartlett LLP

$ $$$

Hanover Street 2475
Palo Alto 94304 CA US

Robert Langdon is a leading M&A lawyer with broad experience representing private equity sponsors, private companies (including portfolio companies) and public companies in high-stakes matters. A Partner in Simpson Thacher’s Corporate Practice, he advises clients in connection with leveraged buyout transactions, mergers, recapitalizations, restructurings and other complex transactions across a wide variety of sectors.

Robert’s recent representations include the following transactions:

  • EQT in multiple transactions, including its $2.35 billion acquisition of Press Ganey (EQT’s first direct equity investment in North America), its $850 million acquisition of Certara and its acquisition of Clinical Innovations
  • Silver Lake in multiple transactions, including its acquisition of at an enterprise value of approximately $2.6 billion and its $300 million investment in Cornerstone OnDemand (Nasdaq: CSOD)
  • Warburg Pincus in multiple transactions, including the $3.4 billion leveraged buyout (with Silver Lake) of Interactive Data Corporation, the $752 million sale of iParadigms to Insight Venture Partners, the leveraged buyout of VistaPharm and the formation and financing of its Helix joint venture with Illumina
  • Silver Lake, Warburg Pincus and Interactive Data Corporation in connection with the $5.2 billion sale of Interactive Data Corporation to Intercontinental Exchange
  • Technology Crossover Ventures and True Wind Capital in multiple transactions, including True Wind’s recent leveraged recapitalization of Transflo

Prior to joining Simpson Thacher, Robert was a partner at Willkie Farr & Gallagher LLP. He received his J.D. from St. John’s University School of Law, and his B.S. from Syracuse University. He is admitted to practice in California and New York.


  • St. John’s University School of Law, 2000 J.D.
  • Syracuse University, 1996 B.S.


  • California 2016
  • New York 2001


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Hanover Street 2475
Palo Alto 94304 CA US
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