Synopsys Closes Nassda Acquisition

MOUNTAIN VIEW, Calif., May 11, 2005 — Synopsys, Inc. (Nasdaq:SNPS), a world leader in semiconductor design software, today announced it has closed its acquisition of Nassda Corporation, a provider of full-chip circuit verification software for complex nanometer semiconductors.

"The addition of the Nassda products to our simulation product portfolio fortifies our analog/mixed-signal offering with complementary products and strong engineering talent,” said Raul Camposano, senior vice president and general manager, Silicon Engineering Group, Synopsys, Inc. “Going forward, Synopsys will continue to focus on growing our analog mixed-signal business and integrating operations to support both the Synopsys NanoSim® simulator and the Nassda HSIM® product family."

About Synopsys
Synopsys, Inc. (Nasdaq:SNPS) is a world leader in electronic design automation (EDA) software for semiconductor design. The Company delivers technology-leading semiconductor design and verification platforms to the global electronics market, enabling the development of complex systems-on-chips (SoCs). Synopsys also provides intellectual property and design services to simplify the design process and accelerate time-to-market for its customers. Synopsys is headquartered in Mountain View, California and has offices in more than 60 locations throughout North America, Europe, Japan and Asia. Visit Synopsys online at http://www.synopsys.com.