Leigh L. Oliver

Leigh L. Oliver

Washington, D.C.

Email [email protected]​hoganlovells.com

Phone +1 202 637 3648

Fax +1 202 637 5910

Practice groupGlobal Regulatory

From strategic transactions to government investigations, Leigh Oliver helps companies step through their most difficult antitrust issues. She represents clients before both state and federal antitrust enforcers on matters such as domestic and multijurisdictional mergers, joint ventures, and competitor collaborations.

Leigh is known in the antitrust bar for working with clients in some of the most heavily scrutinized industries, including health care, life sciences, and aerospace and defense. Her tireless work ethic and ability to build relationships with witnesses and clients to gain in-depth understanding of competitive market dynamics creates the formula for a winning strategy. Leigh was named "Lawyer of the Year – Under 40" by Global Competition Review (GCR) in 2017 and a Mergers & Acquisitions (M&A) and Antitrust Trailblazer by the National Law Journal for her work in 2016.

She has played a critical role in defending health care providers in multiple FTC merger investigations and challenges, including the FTC challenge to the merger of Advocate Health Care and NorthShore University HealthSystem and in LabCorp v. FTC, which was named the 2011 "Litigation of the Year" by GCR. She is a Co-Chair of the ABA Antitrust Section's Health Care and Pharmaceuticals Committee and a member of the American Health Lawyers Association.

Awards and recognitions


Healthcare: Advice to Service Providers, Next Generation Partner
Legal 500 US


Competition: Future Leaders, Most Highly Regarded
Who's Who Legal


40 in their 40s: Notable Women Competition Professionals in Americas
[email protected]


Antitrust: Merger Control
Legal 500 US


Lawyer of the Year - Under 40
Global Competition Review (GCR)


Who's Who Legal


Merger & Acquisitions (M&A) and Antitrust Trailblazer
National Law Journal


Rising Star: Corporate, U.S. Northeast, U.S. South
Euromoney Legal Media Group's Americas Women in Business Law Awards


Outstanding Healthcare Antitrust Lawyer
Nightingale's Health Care News

Education and admissions


J.D., The Catholic University of America, Columbus School of Law, magna cum laude, 2004

B.A., Haverford College, 2000


Co-Chair, ABA Antitrust Section Health Care and Pharmaceuticals Committee

Member, American Bar Association (ABA)  

Member, American Health Lawyers Association (AHLA)

Bar admissions and qualifications

District of Columbia


Representative experience

Represented UW Health and UnityPoint Health in their proposed combination of healthcare provider and insurer services in Wisconsin.

Counsel to Advocate HealthCare in litigating the defense of its 2016 proposed merger with NorthShore University HealthSystem.

Counsel to LabCorp in various transactions, including defense of its challenged merger with Westcliff Medical Laboratories.

Counsel to Lahey Health and Winchester Hospital in a combination that was reviewed by the Massachusetts Health Policy Commission.

Antitrust counsel for PPG Industries, Inc. in various transactions, including the acquisition of Akzo Nobel's architectural coatings business.

Represented GenCorp-Aerojet in its acquisition of Pratt & Whitney Rocketdyne, a transaction that was opposed by the FTC.

Antitrust counsel to Orbital Sciences in its heavily scrutinized acquisition of ATK.

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