Synopsys's stock finished 5.4% up at $139.
For the fiscal third quarter ended July 31, earnings were 65 cents a share versus 52 cents.
Adjusted earnings for the latest period were $1.18 a share, beating the $1.10 estimate of analysts surveyed by Zacks Investment Research.
In the year-earlier period the Mountain View, Calif., company earned an adjusted 95 cents a share.
It is the third time in the past four quarters that Synopsys has beat analyst estimates.
The tech firm, whose software is used to design and test chips, generated revenue of $853 million for the quarter, 2.8% more than the estimate of analysts polled by Zacks.
It also represented a 9.4% increase over the year-earlier quarter, when Synopsys reported $779.1 million in revenue.
"Despite the uncertain geopolitical and economic backdrop, global design activity and customer engagements are thriving," Aart de Geus, chairman and CEO, said in a statement.