Clifford Chance: UnitedHealth Lawyer Stacy Frazier Joins As Antitrust Partner

By Amit Chowdhry • Mar 8, 2026

Global law firm Clifford Chance has appointed Stacy Frazier as a partner in its Washington, DC office, strengthening the firm’s US antitrust practice. Frazier joins from UnitedHealth Group, where she served as deputy general counsel and oversaw a broad portfolio of antitrust matters. Her work covered transactions, litigation and compliance issues within the healthcare sector.

Clifford Chance said Frazier’s experience working in-house at major corporations will help clients navigate complex regulatory environments and coordinate strategies across jurisdictions as antitrust scrutiny intensifies globally.

The firm’s leadership highlighted her experience advising large companies and managing cross-border antitrust matters as a key addition to its growing practice.

KEY QUOTES:

“Stacy’s broad experience in-house at multiple Fortune 100 companies will be immensely helpful for clients looking to align strategies both globally and in the US, enabling them to structure and implement transactions with foresight, confidence and alignment across jurisdictions.”

Marc Besen, Chair of the Global Antitrust Group, Clifford Chance

“We’re excited to welcome Stacy to the team. As regulatory and competitive pressures intensify, her healthcare experience, industry fluency and strategic foresight will be valuable in helping clients shape forward-looking strategies and address a complex regulatory environment.”

Leigh Oliver, Head of US Antitrust Practice and Co-Chair of Healthcare & Life Sciences Sector, Clifford Chance

“I am thrilled to join this incredible team and am excited to draw on my in-house background to deliver comprehensive strategies for clients facing regulatory challenges in today’s increasingly complex antitrust environment.”

Stacy Frazier, Partner, Clifford Chance