Teradyne to Announce First Quarter 2009 Results

Teradyne, Inc. (NYSE:TER) will release results for the first quarter 2009 on Wednesday, Apr. 29, 2009, at 6:30 p.m. Eastern Daylight Time (EDT) or later.

A conference call to discuss the first quarter results, along with management's business outlook will follow at 10 a.m. EDT, Thursday, Apr. 30, 2009. The call will be broadcast simultaneously over the Internet. Interested investors should access the webcast at www.teradyne.com and click on "Investors" at least five minutes before the call begins.

A replay will be available approximately two hours after the completion of the call. The replay number in the U.S. & Canada is 800-642-1687. The replay number outside the U.S. & Canada is 706-645-9291. The pass code for both numbers is 95502319. A replay will also be available on the Teradyne web site www.teradyne.com. Click on "Investors" for a link to the replay. The replay will be available via phone and web site through May 14, 2009.

About Teradyne, Inc.

Teradyne (NYSE:TER) is a leading supplier of Automatic Test Equipment used to test complex electronics used in the consumer electronics, automotive, computing, telecommunications, and aerospace and defense industries. In 2008, Teradyne had sales of $1.1 billion, and currently employs about 3,000 people worldwide. For more information, visit www.teradyne.com. Teradyne (R) is a registered trademark of Teradyne, Inc. in the U.S. and other countries. All product names are trademarks of Teradyne, Inc. (including its subsidiaries).