Exhibit 1
AGREEMENT OF JOINT FILING
Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as
amended, the undersigned hereby consent to the joint filing on their behalf of a
single Schedule 13G and any amendments thereto, with respect to the beneficial
ownership by each of the undersigned of shares of common stock of PDF
SOLUTIONS INC. The undersigned hereby further agree that this statement may
be executed in any number of counterparts, each of which when so executed shall
be deemed to be an original, but all of which counterparts shall together
constitute one and the same instrument.
DATED: February 8, 2012
Xxxxxxx Asset Management Corporation
/s/ Xxxxxx Xxxxxxxxx
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Xxxxxx Xxxxxxxxx
Portfolio Administrator
DATED: February 8, 2012
Xxxxxxx Securities Inc.
/s/ Xxxxxx Xxxxxxxx
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Xxxxxx Xxxxxxxx
Vice President
