There's a three month trial period cheap medication Ackman sent a letter to investors recently saying he was looking to raise a new $1 billion fund that would target one single company for an activist play. Though he didn’t name the target, the letter set some broad parameters: The company has a large capitalization; it is investment-grade; it is a U.S. corporation that operates in one business; and the target has a high barrier to entry, according to people familiar with the letter.