FactSet Ranks Sidley No. 1 for Company Defense Through Q3 2026

Sidley has been ranked the No. 1 legal adviser for company defense in FactSet’s global and U.S. activism and defense league tables for the first three quarters of 2026. FactSet credited Sidley with 46 campaigns globally and 40 campaigns in the United States.

This new FactSet ranking follows Sidley's previous No. 1 rankings by Bloomberg, FactSet and LSEG for H1 2026. Sidley has also been ranked in Band 1 by Chambers USA in Corporate/M&A: Takeover Defense, stating that “Sidley Austin is the best in the business at activism defense work.” Similarly, Legal 500 has ranked Sidley in Tier 1 for Shareholder Activism – Advice to Boards, calling Sidley’s activism co-chairs Kai Liekefett and Derek Zaba “two of the best lawyers in America.”

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 legal defense practice in the world.