Within the past year, shareholder activists have been very busy within the energy space. In this video, Motley Fool energy analysts Joel South and Taylor Muckerman take a close look at Elliott Management's recent initiatives within Hess (HES 0.35%), how TPG-Axon made headlines by going full-on against SandRidge's (NYSE: SD) management, and what Southeastern Asset Management and Carl Icahn have done recently to overturn some of the top brass at Chesapeake Energy (CHKA.Q).