Teradyne Inc. (NASDAQ:TER) is one of the best performing S&P 500 stocks so far in 2026. On April 16, Teradyne acquired TestInsight, a prominent developer of semiconductor test validation and conversion software, to address the increasing complexity of AI and data center hardware. The acquisition is aimed at tightening the workflow between initial design and final testing, a process often slowed by the intricate requirements of modern silicon. By integrating TestInsight's virtual test and pattern generation ...