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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
97210	Teradyne Inc	TER	Instruments For Meas & Testing Of Electricity & Elec Signals (3825)	042272148

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1275985	R Jeffrey Hotchkiss	Teradyne, Inc. 600 Riverpark Drive North Reading MA 01864	President, Systemstestdivision	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2010-04-26	28,125	$4.81	89,420	No	4	M	Direct
Common Stock	Disposition	2010-04-26	28,125	$13.09	61,295	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Non-Qualified Stock Option (Right to Buy)	Disposition	2010-04-26	28,125	$0.00	28,125	$4.81

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
84,375	2010-01-30	2016-01-30	No	4	M	Direct

Footnotes

The reported price is based on a weighted average of multiple same-day transactions with prices ranging from $13.07 to $13.11 per share. Full information regarding the number of shares sold at each separate price is available to the Securities and Exchange Commission staff, the Issuer or any security holder of the Issuer upon request.
This option is granted under Teradyne's 2006 Equity and Cash Compensation Incentive Plan and is exercisable at the rate of 25% per year, commencing on the date of the first anniversary of the grant, January 30, 2010.