Activist investor Nelson Peltz is escalating his attempts to secure board seats at Walt Disney Co (NYSE:DIS) as the company's shares continue to decline. Peltz's firm, Trian Fund Management, has become one of Disney's most significant investors with a stake exceeding $2.5 billion. Despite an unsuccessful attempt to secure a board seat earlier this year, Peltz withdrew his nomination following Disney’s restructuring and cost-cutting plan which momentarily increased the stock value. Since then, Disney’s shares have dropped from over $113 to roughly $80.