ACI Worldwide (ACIW) offers to purchase all outstanding shares of banking software provider S1...

|About: ACI Worldwide, Inc. (ACIW)|By:, SA News Editor

ACI Worldwide (ACIW) offers to purchase all outstanding shares of banking software provider S1 Corp. (SONE) for $9.50/share, a 33% premium to S1's Monday closing price, in a cash and stock deal valued at ~$540M. ACI believes its offer is superior to a deal announced last month that would combine S1 with Fundtech (FNDT). SONE +30%, ACIW -0.2%, FNDT -7.4% premarket.