Patrick O’brien

Ropes & Gray LLP

$ $$$

Boylston Street 800
Boston 02199 MA US

Patrick O’Brien is co-head of the firm’s securities and public companies practice. He concentrates his practice on representing companies and underwriters in financings as well as public and private companies in M&A transactions.

Patrick has extensive experience representing healthcare, life sciences and technology companies and underwriters in connection with equity and debt offerings, as well as mergers and acquisitions and royalty monetizations.


  • JD, Boston University School of Law, 1989
  • BA, University of Illinois, 1983


  • Massachusetts, 1989
  • New York, 2012

Experience :

  • Represented the following issuers in their proposed initial public offerings: Zai Labs, IMS Health Holdings, Inc., Aptalis Holdings Inc., Par Pharmaceutical Holdings, Inc., Iasis Healthcare Corporation, and Petco Holdings, Inc.
  • Represented Alexion Pharmaceuticals, Inc. in its $610 million acquisition (plus milestones) of Enobia Inc.
  • Represented LA BioMED and UCLA in its sale of a portion of its royalty interest in Kybella.
  • Represented Canadian Pension Plan Investment Boardin the purchase of a $168 million royalty interest from Dana Farber Cancer Institute.
  • Represented a publicly traded specialty pharmaceutical company in a complex acquisition and related royalty based financing.
  • Represented a university in connection with the sale of a pharmaceutical royalty stream.


Rate : $$$$

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Boylston Street 800
Boston 02199 MA US
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Lina Stillman

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New York 10006 NY US