X0202 4 2004-11-19 0 0001050550 VOLTERRA SEMICONDUCTOR CORP VLTR 0001240782 BRANSCUM CHRIS L C/O VOLTERRA SEMICONDUCTOR CORPORATION 3839 SPINNAKER COURT FREMONT CA 94538 1 0 0 0 Common Stock 2004-11-19 2004-11-19 4 P 0 10000 21.486 A 358958 I See footnote Common Stock 563319 I See footnote Common Stock 9000 D The shares are owned by Hallador Venture Fund II, L.P. The Reporting Person is a general partner of Hallador Venture Partners, the general partner of Hallador Venture Fund II, L.P.. He disclaims beneficial ownership of the shares held by Hallador Venture Fund II, L.P., except to the extent of his pecuniary interest therein. The shares are owned by Hallador Venture Fund III, L.P. The Reporting Person is a Managing Director of Hallador Venture Partners LLC, the general partner of Hallador Venture Fund III, L.P. He disclaims beneficial ownership of the shares held by Hallador Venture Fund III, L.P., except to the extent of his pecuniary interest therein. /s/ Chris Branscum 2004-11-22