SANM vs UCTT: 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.

Reading it: SANM is the cheaper of the two on forward earnings, but cheaper is not the same as better. Pair the valuation with growth (how far the forward P/E sits below the trailing P/E) and risk (beta) before you decide.

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. SANM and UCTT 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 SANM and UCTT 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.

Sanmina Corporation, founded in Silicon Valley in 1980 and headquartered in San Jose, California, is a Fortune 500 global provider of integrated manufacturing solutions, components, and repair, logistics and after-market services. It serves original equipment manufacturers (OEMs) across industrial and energy, medical, defense and aerospace, automotive, communications networks, and cloud and AI infrastructure, running two businesses: Integrated Manufacturing Solutions and Components, Products and Services. It employs roughly 35,000 people and serves customers from around 20 countries.

Full SANM guide

Ultra Clean Holdings (Nasdaq: UCTT) builds production tools, gas and chemical delivery systems, process modules, and other subsystems that go inside the machines its customers use to manufacture semiconductors. The business splits into a Products division (integrated outsourced subassemblies and high-precision manufacturing, the large majority of revenue) and a smaller Services division (tool chamber parts cleaning, coating, and micro-contamination analysis). Its customers are the big wafer fab equipment makers, and the company is a classic outsourced supplier, meaning its results rise and fall with how much its handful of large customers are spending.

Full UCTT guide

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

• SANM drivers: AI and cloud infrastructure ramp; AMD partnership and preferred-manufacturer status.
• UCTT drivers: AI-driven WFE upcycle; Leading-edge and advanced packaging demand.

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: Sanmina operates on thin EMS margins (non-GAAP operating margin around 6%), so small execution errors or pricing pressure can meaningfully affect profits. For UCTT, customer concentration is the defining risk: the top few clients regularly account for over 70 percent of revenue, so losing share at, or a spending pullback from, a single large customer can swing results dramatically.

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 SANM if you believe its drivers more; UCTT 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 SANM and UCTT guides.

SANM. Revenue and earnings stepped up sharply after the ZT Systems acquisition closed in late 2025, roughly doubling quarterly sales. The stock trades at a large premium to its roughly 15x ten-year average P/E, reflecting AI-driven enthusiasm, so much of the future growth appears to be priced in.

UCTT. Ultra Clean generated roughly $2.1 billion of revenue over the trailing twelve months at a mid-teens non-GAAP gross margin, and reported full-year 2025 non-GAAP EPS near $1.05 while posting a GAAP net loss driven largely by a non-cash goodwill impairment of about $151 million. The stock re-rated sharply higher in 2026 on the AI-equipment upcycle, pushing the market cap to roughly $5.4 billion, or a bit over 2.5 times trailing revenue, which is a rich multiple for a thin-margin, cyclical supplier. Because trailing GAAP earnings were negative, a conventional P/E is not meaningful, so investors tend to anchor valuation on forward WFE-driven earnings power.

Headline figures (approximate, July 2026): SANM shows revenue (fy2026 guidance) ~$13.7B to $14.3B, q2 fy2026 revenue ~$4.0B (up ~102% YoY), fy2025 revenue ~$8.1B, non-gaap eps (fy2026 guidance) ~$10.75 to $11.35; UCTT shows revenue (ttm) ~$2.1B, fy2025 revenue ~$2.05B, q1 2026 revenue ~$533.7M, fy2025 non-gaap eps ~$1.05.

SANM and UCTT 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 SANM and UCTT exposure against your real portfolio. It is not an investment adviser.