Peter Witschi is an associate in Ropes & Gray’s corporate department. His practice is focused on advising public and private companies and investors in a broad range of domestic and cross-border transactions, including mergers, stock and asset acquisitions, tender offers, private equity investments, securities offerings and other strategic transactions and corporate governance matters. Peter also advises public and private companies and asset managers on ESG, corporate social responsibility and business and human rights compliance matters.


  • Represented Pfizer in its $11.6 billion acquisition of Biohaven Pharmaceuticals.
  • Represented Signify Health in its approximately $8 billion sale to CVS Health.
  • Represented GI Partners in its acquisition of Atlas Technical Consultants, a leading provider of infrastructure and environmental solutions.
  • Advised issuers and underwriters in securities offerings across a variety of sectors. Representative experience includes offerings by:
    • MicroVision
    • HOOKIPA Pharma
    • iTeos Therapeutics
  • Advised global asset managers, including Silver Lake, American Industrial Partners, CCMP Capital Advisors and TSG Consumer Partners, on ESG and CSR aspects of various investments across a broad range of industries.

Areas of Practice