Synopsys, Cadence and the Calibre tools of Siemens form an oligopoly in EDA. Every chip design and foundry signoff passes through these three companies. Structurally they are the most important chokepoint in the chain. Yet their stocks lagged this AI cycle. Synopsys was down 3% in both 2025 and 2026, and Cadence rose only 4% in 2025 and 24% in 2026. That contrasts with the large re-rating of memory and equipment over the same span.
It is not because revenue is weak. Synopsys grew fiscal 2025 revenue 15% to 7.05 billion dollars, and Cadence 14% to 5.30 billion. The difference is the nature of that revenue. EDA revenue is subscription and license based, so it compounds steadily rather than spiking with the capex cycle the way memory and equipment do. Structural importance and share-price cyclicality are separate things.
EDA is the archetype of an essential good with low cyclicality. Its customers, NVIDIA, Intel, Marvell and Alchip, rise first, and EDA follows steadily. Siemens EDA is not separately listed, so it cannot be checked through a stock price, but the fact that its Calibre physical verification is the signoff standard at TSMC, Samsung and Intel (over 85%) points to the same conclusion.