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Is Semtech (SMTC) Undervalued Following Its New Optical Chip Launches?

Simply Wall St · 2d ago

Semtech (SMTC) has put new hardware at center stage, unveiling an industry first 10G PON OLT chipset alongside a 224G TIA and driver family aimed at high bandwidth optical infrastructure.

Despite the sharp 12.07% decline in the 1 day share price move to US$147.05, Semtech sits on a 30 day share price return of 4.77% and a year to date share price gain of 95.39%. The 1 year total shareholder return of 134.79% and very large 3 year total shareholder return of more than 5x suggest that momentum, although recently shaken, has been strong over a longer stretch as investors respond to new product launches like the 10G PON OLT chipset and 224G optical solutions and reassess both growth prospects and risk.

Scan other optical and AI infrastructure plays moving on similar themes to Semtech by zeroing in on 60 AI infrastructure stocks, which are already building the next generation of bandwidth and data-center capacity.

Semtech’s product story and recent share price surge describe a powerful business on paper. After a one day drop and a near doubling year to date, is that strength already fully reflected in the valuation?

Most Popular Narrative: 28% Undervalued

Semtech’s most followed valuation story pegs fair value at $204.83 against the last close at $147.05, which frames today’s slide as a move within a wider upside narrative rather than a reset of the thesis.

Accelerating demand from hyperscale data centers and AI infrastructure is associated with robust, multi-year growth across Semtech's high-margin data center business, supported by design wins in advanced optical (FiberEdge), low-power (LPO), and active copper interconnects (CopperEdge/ACC). As data rates move from 400G to 800G and 1.6T, Semtech may be positioned to capture revenue and margin expansion from new content per deployment.

See why 35 investors see Semtech as 28% undervalued.

Result: Fair Value of $204.83 (UNDERVALUED)

Still, Semtech’s story leans heavily on ambitious analyst forecasts for revenue, margins and AI driven data center demand. This leaves the stock exposed if execution or customer spending timelines slip.

Find out about the key risks to this Semtech narrative.

Another View on Semtech’s Valuation

Semtech’s most followed story says the shares trade below fair value, yet the P/E ratio of 89.1x paints a very different picture. That multiple sits almost double the US Semiconductor industry at 44.5x and well above the estimated fair ratio of 47.3x, which points to valuation risk if sentiment cools.

When one model points to upside and another flags a premium, the key question for you is which set of expectations feels more realistic for Semtech over the next few years.

See what the numbers say about this price — find out in our valuation breakdown.

NasdaqGS:SMTC P/E Ratio as at Sep 2026
NasdaqGS:SMTC P/E Ratio as at Sep 2026

Next Steps

Plenty of optimism and some real concern sit side by side in the Semtech story. Move quickly, review the data yourself, and size the trade in a way that fits your risk tolerance, then pressure test your thinking against the 2 key rewards and 3 important warning signs.

Looking for more investment ideas beyond Semtech?

Semtech’s story might have grabbed attention today, but your next strong idea could come from widening the search across other high quality opportunities.

Use the Simply Wall Street Screener to pressure test your thesis, compare alternatives, and avoid leaving potential opportunities on the table as markets move.

This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.