Memory Catch-Up Cycle Could Amplify ASML's EUV Demand Beyond TSMC

What happened

ASML's exposure to the AI memory war may be greater than previously thought, as memory leaders Samsung and SK hynix adopted Low-NA EUV earlier than Micron, positioning ASML to benefit from Micron's catch-up phase. This dynamic supplements the already strong foundry demand from TSMC, which has guided $52B-$56B capex for 2026. However, ASML's current 53.5x P/E and 42.2x EV/EBITDA leave zero margin for error on its 2026 output plan of at least 60 Low-NA EUV systems. Export controls continue to pressure China revenue, which dropped to 19% in Q1 2026 from 36% previously, and any further steps down would offset memory upside. The thesis now gains a potential incremental demand driver from memory, but the investment case still hinges on ASML meeting its own shipment capacity and navigating geopolitics.

Implication

Over the next 1-5 years, the memory AI cycle could contribute a sustained stream of EUV orders beyond the TSMC-led foundry buildout, especially if HBM demand continues to require leading-edge DRAM nodes. However, ASML's ability to capture this upside depends on maintaining its output capacity and mitigating export control headwinds that limit the served market. The risk-reward is not compelling at current prices; waiting for confirmation of output plans and stabilization of China mix at ~$1,350 offers a better entry.

Thesis delta

The article introduces a specific memory catch-up catalyst for ASML that was not prominent in the master report, which had focused more on foundry demand and risks. This increases the probability of the bull scenario where memory EUV orders supplement TSMC, but does not change the core requirement that ASML must execute on its 60+ Low-NA EUV output plan. The risk of export controls limiting China revenue remains a significant offsetting factor, so the overall thesis shifts slightly toward a more balanced demand view but retains WAIT rating until execution is proven.