Sidley Austin LLP

Karen Kazmerzak

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Practice Areas

Karen Kazmerzak, a former Federal Trade Commission lawyer, has a broad practice counseling clients regarding antitrust matters involved in mergers and acquisitions and concerning antitrust issues in licensing, distribution, pricing, and competitor collaborations. She represents clients seeking merger clearance from the FTC and the DOJ, and clients that are third-party market participants subpoenaed by the government or that oppose an acquisition. Karen also works closely with co-counsel and economists around the world to develop the best global strategy for clients’ advocacy across several jurisdictions, including in the United States. Hailed as “very knowledgeable and easy to talk to,” her clients appreciate her strong legal acumen combined with her ability to address the business issues in an array of industries.

Professional Memberships

Karen is an active member of the American Bar Association Section of Antitrust. She served as a vice chair of the Transportation and Energy Industries Committee (2012–2018) and currently serves as an associate editor of ANTITRUST. Karen is also a co-founder of the Women’s Antitrust Forum, an organization based in Washington, D.C.