LAES vs STM: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of August 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. LAES and STM share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined LAES and STM exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

SEALSQ Corp designs and sells secure semiconductors, including secure microcontrollers, secure elements, and digital-identity chips used to authenticate devices in the Internet of Things, smart cities, industrial systems, and similar connected environments. Its strategic focus is post-quantum cryptography (PQC): security built to survive attacks from future quantum computers. Its flagship product, the Quantum Shield QS7001, is positioned as a secure chip that embeds NIST-standardized quantum-resistant algorithms such as ML-KEM (CRYSTALS-Kyber) and ML-DSA (CRYSTALS-Dilithium) directly in hardware, and it launched commercially in late 2025.

Full LAES guide

STMicroelectronics designs and manufactures a broad range of semiconductors, including analog chips, power and discrete devices (notably silicon carbide, where it holds the largest global share at roughly a third of the market), microcontrollers, MEMS sensors, and RF products. Its customers are concentrated in automotive (electrification, ADAS, body and safety electronics) and industrial (factory automation, power conversion, energy), with a more cyclical consumer and personal-electronics business layered on top. Unlike fabless designers, ST owns its fabs, which makes it capital-intensive and highly sensitive to factory utilization, a dynamic that has weighed heavily on margins during the recent downturn.

Full STM guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• LAES drivers: Post-quantum security wedge; QS7001 commercialization.
• STM drivers: Silicon carbide and automotive electrification; Cyclical recovery off the trough.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: SEALSQ's valuation has at times far exceeded what its modest revenue would justify, so the stock depends heavily on the post-quantum and quantum-computing narrative staying in favor. For STM, sTM is deeply cyclical and capital-intensive, so weak factory utilization can compress margins sharply, as it did in 2025 when operating margin fell near breakeven.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick LAES if you believe its drivers more; STM if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the LAES and STM guides.

LAES. SEALSQ is hard to value on conventional metrics: it is unprofitable, its revenue is small, and a large share of its market value is effectively a bet on a future post-quantum market plus the big cash balance on its books. With cash that at times approaches a meaningful fraction of the market cap, some investors frame it partly as a cash-plus-optionality story, but the cash was raised by issuing many new shares, so per-share value has been diluted. Standard ratios like P/E do not apply while the company loses money; the stock trades on narrative, pipeline expectations, and sentiment around quantum computing far more than on current results.

STM. STM's valuation looks expensive on forward earnings largely because profits are depressed at the bottom of the cycle, not because the business is structurally rich. Revenue troughed near $3.1 billion in Q1 2026 with gross margin around 33.8%, well below the 44 to 46% level management targets in its longer-term model. The multiple therefore embeds an expectation that margins and earnings recover meaningfully over the next couple of years.

Headline figures (approximate, FY2025 results and latest available): LAES shows fy2025 revenue ~$18 million (about +66% YoY), fy2025 net loss ~$34 million, cash & equivalents ~$418 million at year-end 2025 (>$500M with early-2026 raises), market cap Roughly $0.6 billion (varies widely with the stock); STM shows revenue (ttm) ~$12B, fy2025 revenue ~$11.8B (down ~11%), q1 2026 revenue ~$3.1B (up ~23% YoY), q1 2026 gross margin ~33.8%.

LAES and STM are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined LAES and STM exposure against your real portfolio. It is not an investment adviser.