X0306 4 2015-01-27 0000097210 TERADYNE, INC TER 0001198621 BRADLEY MICHAEL A TERADYNE, INC. 600 RIVERPARK DRIVE NORTH READING MA 01864 1 Common Stock 2015-01-27 4 M 0 26126 18.88 A 149653 D Common Stock 2015-01-27 4 F 0 11705 18.88 D 137948 D Common Stock 2015-01-27 4 M 0 13063 18.88 A 151011 D Common Stock 2015-01-27 4 F 0 5853 18.88 D 145158 D Common Stock 2015-01-28 4 M 0 25632 18.74 A 170790 D Common Stock 2015-01-28 4 F 0 11484 18.74 D 159306 D Common Stock 2015-01-28 4 M 0 12816 18.74 A 172122 D Common Stock 2015-01-28 4 F 0 5742 18.74 D 166380 D Restricted Stock Units 0 2015-01-27 4 M 0 26126 0 D Common Stock 26126 26128 D Restricted Stock Units 0 2015-01-27 4 M 0 13063 0 D Common Stock 13063 13064 D Restricted Stock Units 0 2015-01-28 4 M 0 25632 0 D Common Stock 25632 0 D Restricted Stock Units 0 2015-01-28 4 M 0 12816 0 D Common Stock 12816 0 D Each RSU represents the right to receive one share of Teradyne, Inc. common stock. These are performance-based RSU's. The number of performance-based RSU's was determined on January 22, 2013 and will vest in four equal annual installments beginning on January 27, 2013. These RSU's were issued under Teradyne's 2006 Equity and Cash Compensation Incentive Plan, are time-based, and will vest in four equal installments beginning on January 27, 2013. These are performance-based RSU's. The number of performance-based RSU's was determined on January 24, 2012 and will vest in four equal annual installments beginning on January 28, 2012. Indicates conversion upon vesting of 25% of the time-based Restricted Stock Units (RSU's) granted on January 28, 2011. The remaining portion will vest on January 28, 2015. /s/ Ryan E. Driscoll, Deputy General Counsel, by power of attorney 2015-01-29