Antoinette Giblin is Editorial Manager at Diligent Market Intelligence (DMI). This post is based on her Diligent memorandum.
Despite a fresh wave of market volatility, shareholder activism proved remarkably resilient in the first half of 2026, with activity holding steady at H1 2025 levels.
M&A continued to build momentum as a leu lever for activists with many also more willing to stand in the way of deals they viewed as undervalued or poorly timed. Outside of dealmaking, AI also found its place in the activist playbook with key technology brands pressed on integration and cost rationalization.
Settlements provided the only real path to the boardroom with few fights going the whole way to a vote as boards and activists worked to find common ground uncertain markets.
The Diligent Market Intelligence editorial team tracked the season’s defining contests. Here are our picks for the wildest:

