TERADYNE, INC — Director's Dealing 2010

Jan 28, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TERADYNE, INC (TER)
CIK: 0000097210
Period of Report: 2010-01-25

Reporting Person: BRADLEY MICHAEL A (Director, CEO and President)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-01-25	Common Stock	M	27288	—	Acquired	231998	Direct
2010-01-25	Common Stock	F	9011	—	Disposed	222987	Direct
2010-01-26	Common Stock	M	18783	—	Acquired	241770	Direct
2010-01-26	Common Stock	F	5964	—	Disposed	235806	Direct
2010-01-26	Common Stock	M	3732	—	Acquired	239538	Direct
2010-01-26	Common Stock	F	1185	—	Disposed	238353	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-01-25	Restricted Stock Units	$0	M	27288	Acquired		Common Stock (27288)	Direct
2010-01-26	Restricted Stock Units	$0	M	18783	Acquired		Common Stock (18783)	Direct
2010-01-26	Restricted Stock Units	$0	M	3732	Acquired		Common Stock (3732)	Direct

Footnotes

F1: Shares/units withheld but not issued to satisfy certain tax withholding obligations.

F2: Indicates conversion upon vesting of 25% of the time-based Restricted Stock Units (RSU's) granted on January 25, 2008. The remaining portion will vest in two equal installments annually on the anniversary of the grant.

F3: Indicates conversion upon vesting of 25% of the time-based RSU's granted on January 26, 2007. The remaining portion of the time-based RSU's will vest on January 26, 2011.

F4: Indicates conversion upon vesting of 25% of the performance-based RSU's granted on January 26, 2007. The remaining portion of the performance-based RSU's will vest on January 26, 2011.