Pursuant to Rule 424(B)(3) Registration No. 333-75735 SUNGARD/R/ DATA SYSTEMS INC. SUPPLEMENT DATED JULY 16, 1999 TO PROSPECTUS DATED APRIL 16, 1999 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 item regarding Carl LaGrassa is amended and restated as follows: # of Shares # of Shares # of Shares % of Shares Owned Before Being Offered Owned After Owned After Name of Selling Stockholder the Offering For Sale the Offering the Offering - ------------------------------------------------ ------------- ------------- ------------ ------------ Carl LaGrassa................................... 5,393,998 5,120,916 273,082 * Bollinger, Wells, Lett & Co. Inc. .............. 67,642 67,642 0 *