"The Foundations and Anatomy of Shareholder Activism" explores how different groups of shareholders influence publicly listed companies in the UK. Institutional shareholders focus on good corporate governance, while hedge funds prioritize extracting value and exiting investments. The book argues that institutional activism through general meetings is well-supported by theory and law, but calls for more informal activism may pose challenges. On the other hand, a cautious approach is advised towards hedge fund activism due to potential long-term consequences. More evidence is needed to fully understand the impacts of hedge fund activism.