Heather Greenfield

Associate, Washington, DC



Heather Greenfield is an associate in the Global Antitrust/Competition Practice of White & Case. Heather’s areas of focus include government merger and non-merger investigations, counseling on antitrust issues, and antitrust litigation. 

Heather has experience representing clients in all phases of merger clearance before the Federal Trade Commission and Department of Justice, and before federal courts in litigated challenges by the government. Heather counsels clients on issues relating to the Hart-Scott-Rodino Antitrust Improvements Act of 1976 (HSR Act) and global merger notification requirements, as well.

Heather has also successfully defended clients in non-merger investigations, and has advocated for government intervention on behalf of parties adversely impacted by proposed mergers.
From 2013-2014, Ms. Greenfield served as a law clerk for the Honorable Jane R. Roth of the United States Court of Appeals for the Third Circuit. 

Bars and Courts
District of Columbia Bar
New York State Bar
Emory University School of Law
Emory University
Emory University


Saudi Aramco, in its US$69.1 billion merger with Saudi Basic Industries Corporation (SABIC) in the 2019 merger of the world's largest oil and petrochemical companies.

A consortium composed of Brookfield Infrastructure and its institutional partners and GIC on the US$8.4 billion acquisition of Genesee & Wyoming Inc. The transaction was named "Private Equity Deal of the Year" by IFLR 2020.

Vertex Pharmaceuticals, Inc., in its acquisition of cystic fibrosis drug, CTP-656, from Concert Pharmaceuticals, Inc., for up to US$250 million.

Anthem, Inc., in its attempted US$54.2 billion acquisition of Cigna Corporation.

Omnicare, the US’s leading provider of pharmacy services to long term care facilities, in its sale to CVS Health, for US$12.7 billion.

Zimmer Holdings, Inc. in its acquisition of Biomet, Inc., a leading global device manufacturer, for a total of US$13.35 billion.