Exhibit 99.1 Teradyne Reports First Quarter 2024 Results • Revenue and earnings above the high-end of Q1 guidance • Revenue of $600 million in Q1’24, down 3% from Q1’23 • Strong year-over-year growth in memory test offset by continued softness in mobility Q1'24 Q1'23 Q4'23 Revenue (mil) $ 600 $ 618 $ 671 GAAP EPS $ 0.40 $ 0.50 $ 0.72 Non-GAAP EPS $ 0.51 $ 0.55 $ 0.79 NORTH READING, Mass. – April 24, 2024 – Teradyne, Inc. (NASDAQ: TER) reported revenue of $600 million for the first quarter of 2024 of which $ ...