X0306 4 2013-05-06 0 0000768251 ALTERA CORP ALTR 0001554623 NELSON MARK JON 101 INNOVATION DRIVE SAN JOSE CA 95134 0 1 0 0 Sr VP, Worldwide Sales Performance Restricted Stock Unit 2013-05-06 4 A 0 23550 0 A Common Stock 23550 23550 D Restricted Stock Unit (RSU) 2013-05-06 4 A 0 17663 0 A Common Stock 17663 57383 D Each Restricted Stock Unit ("RSU") represents a contingent right to receive at settlement one share of Altera common stock at no cost. The performance restricted stock units ("PRSUs") were granted under Altera's 2005 Equity Incentive Plan. The actual number of PRSUs that may be earned will be determined by comparing Altera's total shareholder return ("TSR") to the TSR of the Philadelphia Semiconductor Total Return Index (the "Index") immediately preceding and at end of the three-year period commencing May 6, 2013 and ending May 6, 2016 (the "Performance Period'). Each 1% difference between Altera's TSR and the Index TSR at the end of the Performance Period will result in a 2% upwards or downwards adjustment to Mr. Nelson's payout percentage. The number of performance stock units shown in column 5 and 7 is equal to the maximum number of PRSUs that may be earned. The target number of PRSUs that may be earned is 11,775. The minimum number of PRSUs that may be earned is zero. Subject to the Reporting Person's continuing employment and the provisions in the Altera's standard form of RSU award agreement, the shares will commence vesting as of the Grant Date and vest at a rate of 25% annually. Shares will be delivered to the reporting person on each vest date. MARK JON NELSON 2013-05-08