X0609 4 2026-10-15 0 0000097210 TERADYNE, INC TER 0001666934 Smith Gregory Stephen false C/O TERADYNE, INC. 600 RIVERPARK DRIVE NORTH READING MA 01864 1 1 0 0 President and CEO 1 Common Stock 2026-10-15 4 S 0 4000 341.28 D 104495.4075 D The reported transactions were effected pursuant to a sales plan adopted by the Reporting Person on February 12, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934. /s/ Ryan E. Driscoll, Attorney-in-Fact 2026-10-19