Brett worked with his father for over 15 years as an analyst, but recently took a break. He remained involved as a consultant and now represents his father on the board of Newell Brands Inc., the maker of Sharpies and other products. He previously ran a more than $6 billion fund at Icahn Enterprises. After joining Icahn Enterprises, Brett steered the firm toward profitable investments like one in Apple. Icahn said he wouldn’t have considered that investment because it lacked an activism angle. At the new fund, Brett would need to put a percentage of his own money into every investment, and is thinking about buying $25 million worth of Icahn Enterprises shares.