X0306 4 2020-01-27 0000097210 TERADYNE, INC TER 0001666934 Smith Gregory Stephen TERADYNE, INC. 600 RIVERPARK DRIVE NORTH READING MA 01864 0 1 0 0 President, Semiconductor Test Common Stock 2020-01-27 4 A 0 21094 0 A 64474 D Common Stock 2020-01-27 4 F 0 8394 69.49 D 56080 D Common Stock 2020-01-27 4 M 0 2241 19.43 A 58321 D Common Stock 2020-01-27 4 S 0 2241 69.45 D 56080 D Common Stock 2020-01-28 4 M 0 4714 28.56 A 60794 D Common Stock 2020-01-28 4 S 0 4714 69.96 D 56080 D Common Stock 2020-01-28 4 M 0 3314 47.70 A 59394 D Common Stock 2020-01-28 4 S 0 3314 69.96 D 56080 D Common Stock 2020-01-28 4 M 0 2071 36.75 A 58151 D Common Stock 2020-01-28 4 S 0 2071 69.96 D 56080 D Stock Option (Right to Buy) 19.43 2020-01-27 4 M 0 2241 0 D 2023-01-29 Common Stock 2241 2241 D Stock Option (Right to Buy) 28.56 2020-01-28 4 M 0 4714 0 D 2024-01-27 Common Stock 4714 2357 D Stock Option (Right to Buy) 47.70 2020-01-28 4 M 0 3314 0 D 2025-01-26 Common Stock 3314 3315 D Stock Option (Right to Buy) 36.75 2020-01-28 4 M 0 2071 0 D 2026-01-25 Common Stock 2071 6214 D Represents performance-based restricted stock units ("PRSUs") granted to the Reporting Person under the Issuer's 2006 Equity and Cash Compensation Incentive Plan on January 27, 2017. Each PRSU represents the right to receive one share of Common Stock. The number of PRSUs was determined and vested in full on January 27, 2020. Shares withheld by the Issuer to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of the PRSUs on January 27, 2020. The option vests 25% per year over four years beginning on January 29, 2017, the first anniversary of the grant. The option vests 25% per year over four years beginning on January 27, 2018, the first anniversary of the grant. The option vests 25% per year over four years beginning on January 26, 2019, the first anniversary of the grant. The option vests 25% per year over four years beginning on January 25, 2020, the first anniversary of the grant. /s/ Ryan E. Driscoll, Attorney-in-Fact 2020-01-29