Elliott Investment Management says it manages funds that together hold an investment of $4 billion in PepsiCo. The investor calls the Pepsi Max and Lay’s owner “one of the world's great consumer franchises” but it wants to see significant change.The companies at which Elliott Investment Management has pushed for change include BP (which said it would scale back investment in renewable energy and up spending on oil and gas in the wake of the investor joining its share roster), US manufacturing and tech group ...