Utilize the input text as a context reference, choose the right relationship between 'Appaloosa Management' and 'David Tepper' from the options.
Options: founded by, publisher, position held, subsidiary

Hedge fund mogul David Tepper was one of the investors pressuring the company early in the year and in the second quarter his Appaloosa Management bought an additional 3.5 million shares, raising its stake to 18.8 million.
founded by