Why Is Synopsys ( $SNPS) Stock Up +3.33% Today? (Find out why any stock moved today on Tickeron.) Synopsys (SNPS) shares climbed 3.33% to $428.90, up from a prior close of $415.09. The primary catalyst was a multi-year, $1 billion-plus custom silicon IP agreement with Amazon Web Services, announced on the company's Investor Day. The deal positions Amazon as lead customer for Synopsys' expanded application-optimized IP blueprints, extending into a license-plus-royalty model. $CDNS $PDFS $ROP $BSY $CLSK