Rule 424(b)(3) Registration No. 333-75737 SUNGARD(R) DATA SYSTEMS INC. SUPPLEMENT DATED JUNE 28, 1999 TO PROSPECTUS DATED APRIL 16, 999 This supplement provides new and additional information beyond that contained in the Prospectus and should be retained and read in conjunction with such Prospectus. Under the caption "SELLING STOCKHOLDERS," the line items regarding Gary Williams and James Jenkins are amended and restated as follows: # of Shares # of Shares Owned Being # of Shares % of Shares Before the Offered For Owned After Owned After Name of Selling Stockholder Offering Sale the Offering the Offering - ----------------------------------- ----------- ----------- ------------ ------------ Gary Williams........................ 241,486 213,337 28,149 * James Jenkins........................ 224,286 196,137 28,149 * The Church of Jesus Christ of Latter 97,200 97,200 0 * Day Saints..........................