Altera Updates Second Quarter Guidance

SAN JOSE, Calif.--May 30, 2006--Altera Corporation (Nasdaq:ALTR) today announced its mid-quarter update for the second quarter of 2006.

The company reaffirms that second quarter sales will be in line with previous guidance for 7% to 10% sequential growth.

The company now expects up to several million dollars of additional SG&A expense in the second quarter resulting from its previously announced review of stock option granting practices and related accounting.

New products lead the company's growth with Stratix(R) II, Cyclone(TM) II, MAX(R) II, and HardCopy(R) devices all demonstrating continued strong sales increases.

While supply of certain types of Stratix, Stratix II, and HardCopy devices remain tight, the company believes that lead times for these parts will return to normal within one to three months, which is in line with previous company estimates.

About Altera

Altera's programmable solutions enable system and semiconductor companies to rapidly and cost-effectively innovate, differentiate, and win in their markets. Find out more at http://www.altera.com.

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