Exhibit 10.25

 

ALTERA CORPORATION

AMENDMENT TO CHANGE IN CONTROL SEVERANCE AGREEMENT

FOR JOHN DAANE

 

Effective May 12, 2004, Section 3 of the Change in Control Severance Agreement
(“Agreement”) entered into between Altera Corporation and John Daane on November
30, 2000, is hereby amended and replaced in its entirety as follows:

 

3. Severance Upon the Occurrence of a Trigger Event. In the event of the
occurrence of a Trigger Event, you shall receive from the Company within thirty
(30) days of the date of termination the ‘Change in Control Severance Package,’
as hereinafter defined. The Change in Control Severance Package shall consist of
(i) payment equivalent to twenty-four months of your then-current base salary,
(ii) a bonus equivalent to two times your target bonus, if any, for the fiscal
year in which the Change in Control occurs, and (iii) accelerated vesting of all
options and restricted shares which have been granted or issued at least six
months prior to the Change in Control. You shall have one (1) year from the date
of termination to exercise any stock options for which vesting is accelerated
pursuant to subsection (iii). The Change in Control Severance Package (or
Limited Payment Amount, as defined in Section 4) provided for herein shall be
paid in lieu of any other severance to you.”

 

All other terms and conditions of the Agreement remain unchanged.

 

IN WITNESS WHEREOF, the Parties have executed this Amendment on the respective
dates set forth below.

 

JOHN DAANE

 

ALTERA CORPORATION

/s/ John Daane

--------------------------------------------------------------------------------

 

By:

 

/s/ William E. Terry

--------------------------------------------------------------------------------

           

William E. Terry

           

Chairman, Compensation Committee

Date:

 

____________

 

Date:

 

____________