Michael J. Sheerin

Michael J. Sheerin

Counsel, Antitrust/Competition

Michael Sheerin advises clients on a broad range of antitrust issues arising in connection with transactions, litigation and day-to-day business matters. He has worked in a diverse range of industries, including technology, health care, life sciences, entertainment, retail, manufacturing and consumer products.


In recognition of Mr. Sheerin’s work in antitrust and litigation, he was named one of Best Lawyers’ 2023 Ones To Watch.

Mr. Sheerin has experience representing clients in all aspects of mergers and acquisitions reviewed by the Antitrust Division of the Department of Justice and the Federal Trade Commission, and has appeared before state antitrust authorities. He has assisted in numerous high-profile transactions, including:

  • Activision Blizzard Inc. in its acquisition by Microsoft Corporation
  • Spotify Technology S.A. in its acquisition of Findaway World
  • Centene Corporation in several transactions, including its acquisition of WellCare Health Plans, Inc.
  • DuPont De Nemours, Inc. in several transactions, including its merger with the Dow Chemical Company
  • Red Hat, Inc. in its acquisition by IBM
  • Express Scripts Holding Company in its acquisition by the Cigna Corporation
  • Rockwell Collins in its combination with United Technologies
  • Mars Inc. in several transactions, including its acquisition of VCA Inc.
  • Becton Dickinson in its acquisitions of C.R. Bard and CareFusion
  • EMC Corporation in its acquisition by Denali Holding Inc., the parent company of Dell Inc.
  • Boral Limited in its acquisition of Headwaters Incorporated
  • Citrix Systems, Inc. on the merger of its GoTo business with LogMeIn, Inc.
  • Jos. A. Bank Clothiers Inc. in its unsolicited, but subsequently agreed upon, acquisition by The Men’s Wearhouse, Inc.
  • Endo Pharmaceuticals Holdings Inc. in numerous acquisitions, including Par Pharmaceutical and Paladin Labs Inc.

Mr. Sheerin’s litigation experience includes representing clients in connection with government investigations and private litigation arising from a variety of alleged antitrust violations, including price-fixing, group boycotts and price discrimination. In the area of general antitrust counseling, he advises clients on a variety of matters, including joint ventures, competitor collaborations, unilateral conduct, and pricing and distribution issues.



  • J.D., Georgetown University Law Center, 2012
  • B.A., Tulane University, 2006


  • New York

Michael J. Sheerin

Counsel, Antitrust/Competition