David Tepper, billionaire hedge fund manager at Appaloosa Management, is quietly reaping big rewards this summer. While Nvidia Corp NVDA grabs headlines, Tepper's under-the-radar bet on Taiwan Semiconductor Manufacturing Co. TSM has surged nearly 25% in under three months, generating roughly $57 million in paper gains.Track TSM stock here.TSM: The Hidden AI WinnerAppaloosa's latest 13F filing shows Tepper held 1.02 million shares of TSM as of June 30, 2025, valued at about$232 million. By Sept. 23, the sto ...