ASML or AAOI: Which Tech Stock Is Better-Placed at Present?

ASML Holding ASML and Applied Optoelectronics AAOI are prominent participants in the Zacks Computer and Technology sector, both benefiting from the rapid expansion of artificial intelligence infrastructure and data center demand.

ASML Holding is making rapid strides, courtesy of its dominant position in extreme ultraviolet (“EUV”) lithography systems. Applied Optoelectronics, meanwhile, develops and manufactures fiber-optic networking solutions serving internet data centers, cable television, telecommunications and fiber-to-the-home markets.

Given this backdrop, a closer examination of their competitive strengths is warranted to assess which company is better positioned within the sector and currently represents the more attractive investment opportunity.

The Case for AAOI Stock

Applied Optoelectronics is benefiting from robust demand for AI-driven data center infrastructure, which is fueling significant growth and positioning it for further upside.

The growing demand for its 400G and 800G solutions is aiding AAOI as organizations worldwide upgrade from conventional data centers to AI-centric infrastructure. AI-powered data centers require sophisticated networking capabilities and high-speed optical interconnect technologies to manage the significantly greater workloads needed for next-generation computing environments.

Historically, AAOI maintained a substantial operational presence in China. However, throughout 2025, the company emphasized vertical integration and expanded its manufacturing operations in the United States to mitigate supply chain, cost and policy-related risks. While these initiatives strengthen its long-term positioning, the associated investments in vertical integration and new manufacturing facilities pressured profitability, as reflected in its first-quarter 2026 results.

To meet increasing customer demand, Applied Optoelectronics has expanded production capacity, enhanced automation initiatives and increased inventory levels to support higher output. Ongoing improvements in manufacturing efficiency are also expected to contribute to the company's growth.

The Case for ASML Stock

ASML sees AI as a major long-term catalyst, strengthening demand for its EUV lithography systems. The company is using AI in engineering, product development and customer support to improve efficiency.

Its collaboration with Mistral AI to deploy generative AI capabilities across engineering workflows and customer service further strengthens operational efficiency while accelerating problem-solving and design processes.

Supported by billions invested in annual research and development, an unmatched technological moat and leadership in advanced lithography, ASML is well-positioned to capitalize on the AI-driven semiconductor investment cycle. With AI serving as both a powerful demand driver and an internal productivity enabler, the company remains a critical force underpinning the global AI revolution and long-term semiconductor innovation.

Estimates for ASML and AAOI    

The Zacks Consensus Estimate for ASML’s 2026 revenues implies a 35.2% increase, and that for EPS indicates a 56% year-over-year rise. EPS estimates have witnessed a northbound movement in the past 60 days.

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The Zacks Consensus Estimate for AAOI’s 2026 revenues implies a 128% increase, and that for EPS too indicates a triple-digit (% -wise) year-over-year rise. However, earnings estimate revisions over the past 60 days have been downward.

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ASML Outscores AAOI On the Price Front

Over the past three months, ASML’s shares have gained in high single digits (% wise) against AAOI’s double-digit fall in the same time frame.

3-Month Price Comparison

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Valuation Check: AAOI vs. ASML

AAOI’s shares currently trade at 43.21X forward earnings. ASML’s forward-to-earnings ratio of 32.18 is lower than that of AAOI, making the former more attractive on the valuation front as well.

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Conclusion

Agreed that both ASML and Applied Optoelectronics benefit from AI-driven optical networking demand, but the former’s stronger price performance, cheaper valuation and rising earnings estimate revisions give it the edge.

Based on our analysis, ASML emerges as the winner in this faceoff, despite both stocks currently carrying a Zacks Rank #3 (Hold). You can see the complete list of today’s Zacks #1 Rank (Strong Buy) stocks here.

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This article originally published on Zacks Investment Research (zacks.com).

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