FactSet ranked Sidley as the No. 1 legal adviser for company defense in its U.S. activism and defense league tables for the first half of 2025. FactSet credited Sidley with 24 campaigns. Sidley also ranked as the No. 1 company-side legal adviser in The London Stock Exchange Group (LSEG) shareholder activism league tables for the first half of 2025. LSEG credited Sidley with 33 campaigns.
The FactSet and LSEG rankings follow Sidley’s No. 1 ranking by Bloomberg in the first half of 2025, along with Sidley’s Band 1 ranking in 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 Haakon E. Liekefett and Derek Zaba “two of the best lawyers in America.”
Sidley has been ranked No. 1 in the shareholder activism defense league tables by Bloomberg, FactSet, Diligent, and LSEG for company-side engagements since 2020.
In the past five years, Sidley has represented companies in approximately 150 proxy contests, several hundred activist campaigns, and dozens of settlements — more than any other legal defense practice in the world.
