In 2015, Nelson Peltz's activist campaign against chemical firm DuPont faced defeat due to opposition from top institutional shareholders. Now, nearly a decade later, those same shareholders, including Vanguard, State Street, and BlackRock, are at the center of another high-stakes corporate battle, this time involving entertainment giant Disney.

BlackRock, a significant Disney shareholder with a 4.2% stake, has reportedly sided with management, according to The Wall Street Journal. T. Rowe Price and Norway's sovereign wealth fund have also voiced support for Disney's current leadership.