Kai H.E. Liekefett and Derek Zaba are Partners at Sidley Austin LLP. This post is based on a Diligent piece by Mr. Liekefett, Mr. Zaba, Josh Black, and Antoinette Giblin.
2025 offered a reminder, to boards and investors alike, that shareholder activism does not move in a straight line.
Market volatility, best exemplified by the second-quarter turmoil surrounding “Liberation Day,” prompted many activists to pause or recalibrate. Engagement rebounded with force in the second half of the year, a period marked by the speed with which participants adapted. This reinforced a theme we always tell clients: activism is no longer limited to the traditional proxy season, but rather is a persistent and structural feature of the public company environment.

