X0303 4 2009-11-02 0000708850 DIONEX CORP /DE DNEX 0000903510 ANDERSON DAVID L 755 PAGE MILL ROAD, SUITE A-200 PALO ALTO CA 94304-1005 1 Common 2009-11-02 4 S 0 1400 66.8089 D 33600 I By Trust Common 2009-11-04 4 S 0 8600 66.8943 D 25000 I By Trust The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $66.80 to $66.83, inclusive. The reporting person undertakes to provide to Dionex Corporation, any security holder of Dionex Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Shares held by a trust of which the reporting person is the trustee. The reporting person disclaims beneficial ownership in these shares except as to the reporting person's pecuniary interest in the trust. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $66.78 to $67.19, inclusive. Robert Yin, by power of attorney 2009-11-04