Chambers USA published its selective list of leading practices and attorneys in the United States for the category “Takeover Defense” for 2025. Sidley was ranked in Band 1 for this practice for the fourth year in a row. In addition, the co-chairs of Sidley’s Shareholder Activism and Corporate Defense practice, Kai Liekefett and Derek Zaba, were both ranked individually in Band 1 and 2, respectively.
These Chambers rankings follow Sidley’s No. 1 rankings by Bloomberg, FactSet, Diligent, and LSEG for company-side engagements by legal advisors globally and in the United States in the past five years. Sidley is also ranked in Tier 1 by The Legal 500 (U.S.) for “Shareholder Activism – Advice to Boards,” which also lists Kai Liekefett and Derek Zaba individually as leading lawyers for advice to boards.
In the past five years, Sidley has represented companies in more than 150 proxy contests, several hundred activist campaigns, and dozens of settlements — more than any other defense law practice in the world.
