X0303 4 2011-04-21 0 0001050550 VOLTERRA SEMICONDUCTOR CORP VLTR 0001189229 PAISLEY CHRISTOPHER B C/O VOLTERRA SEMICONDUCTOR CORPORATION 47467 FREMONT BLVD. FREMONT CA 94538 1 0 0 0 Common Stock 2011-04-21 4 M 0 3600 A 18600 D Restricted Stock Unit 2011-04-21 4 M 0 3600 D Common Stock 3600 0 D Restricted Stock Unit 2011-04-22 4 A 0 3600 0.00 A Common Stock 3600 3600 D As reported on Form 4 dated April 27, 2010, the reporting person received a grant of 3,600 Restricted Stock Units (RSUs) on April 23, 2010, to vest in full on the earlier of (i) the first anniversary of such date of grant or (ii) the day prior to the date of the first annual meeting following the date such grant was made. On April 21, 2011, the RSUs vested, resulting in the issuance of 3,600 shares of the Company's common stock. Each restricted stock unit represents a contingent right to receive one share of Volterra common stock. The restricted stock unit award shall vest in full on the earlier of (i) the first anniversary of such date of grant or (ii) the day prior to the date of the first annual meeting following the date such grant was made. Not Applicable. /s/David Oh, by Power of Attorney 2011-04-25