Informatica 8-K Departure of Directors or Principal Officers

Exhibit 3.1

CERTIFICATE OF AMENDMENT OF BYLAWS

OF

INFORMATICA CORPORATION

     The undersigned, being the duly elected, qualified, and acting Secretary of Informatica Corporation (the “Company”), hereby certifies that the first sentence of Article III, Section 3.1 of the Amended and Restated Bylaws of the Company was amended by the Board of Directors, effective January 24, 2008, to read in its entirety as follows:

     “3.1NUMBER AND TERM OF OFFICE.

The number of directors which shall constitute the whole of the Board of Directors shall be nine (9).”

     IN WITNESS WHEREOF, the undersigned has hereunto set his hand and affixed the corporate seal this 24th day of January, 2008.

/s/ Earl E. Fry  

Earl E. Fry 

Secretary