Shares of Synopsys (NASDAQ: SNPS) suffered a sharp decline on Friday, closing at $384.28 after shedding 7.85% of their value. The sell-off erased approximately $6.27 billion in market capitalization, a figure equivalent to roughly 65% of the company's fiscal 2026 revenue guidance midpoint. The move came after Moonshot AI disclosed details of its Kimi K3 chip-design project, which utilized open-source electronic design automation (EDA) tools.
The market's reaction extended beyond Synopsys. Cadence Design Systems (NASDAQ: CDNS) also saw its stock fall 9.47% on Friday, contributing to a combined $15.8 billion loss in market value for the two leading EDA vendors. Over the past week, Synopsys has declined 13.74%, while Cadence has dropped 14.07%. In comparison, the Nasdaq Composite fell just 2.9% during the same period.
Open-Source EDA Raises Questions
Moonshot AI's demonstration described the Kimi K3 as an initial proof of concept. The chip design was completed autonomously over 48 hours using open-source EDA tools and a mature 45-nanometer library. The resulting design measures four square millimeters, operates at 100 megahertz, and generates upwards of 8,700 simulated tokens per second. However, these results are based on simulation data, not actual silicon hardware.
Bloomberg Intelligence analyst Niraj Patel advised a cautious stance, noting that the demonstration does not pose an immediate threat to Synopsys and Cadence. 'We see no immediate threat to Cadence and Synopsys' revenue bases,' Patel wrote, emphasizing that leading-edge workflows still rely on proprietary tools. The 45-nanometer process used in the Kimi K3 is several generations behind the advanced 3- and 2-nanometer nodes that drive most of the industry's revenue.
Valuation and Financial Outlook
Synopsys currently trades at approximately 24 times forward earnings, while Cadence commands a higher multiple of about 41 times. Synopsys also carries $8.36 billion in net debt, a factor that contributes to its valuation discount relative to Cadence. The company maintains its fiscal 2026 revenue forecast of $9.63 billion to $9.71 billion, with adjusted earnings per share expected between $14.72 and $14.80. For the third quarter, revenue is projected to range from $2.41 billion to $2.46 billion.
Chief Executive Sassine Ghazi indicated in May that the company is incorporating AI into its pricing strategy, with customer discussions featuring paid AI 'agent engineers' and additional deals that would generate royalties on chips using Synopsys intellectual property.
Market Context and Upcoming Catalysts
The sell-off in EDA stocks comes ahead of a busy week for AI-related sentiment. Alphabet (NASDAQ: GOOGL) and Intel (NASDAQ: INTC) are scheduled to report earnings, which could further influence market perceptions of AI spending. Moonshot AI plans to publish the complete weights for the Kimi K3 by July 27, with a focus on reproducibility rather than benchmarks.
Risks remain for both Synopsys and Cadence. If Moonshot's open-source approach proves viable at leading-edge nodes, it could pressure EDA pricing. Conversely, if the replication fails, some of the recent losses may be reversed. For now, Friday's repricing is based on simulation data from a 45-nanometer proof of concept, leaving the long-term implications uncertain.
