APH vs SXI: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of September 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. APH and SXI 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 APH and SXI 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.

Amphenol Corporation designs and manufactures electronic and fiber optic connectors, cable, and interconnect systems used across communications, information technology, automotive, industrial, aerospace, defense, mobile devices, and broadband markets. The business is organized into segments spanning harsh environment solutions, communications solutions, and interconnect and sensor systems, and it grows through a combination of organic design wins and a long, disciplined acquisition history. Its January 2026 completion of the roughly ~$10.5 billion purchase of CommScope's Connectivity and Cable Solutions business meaningfully expanded its fiber optic and IT datacom capabilities.

Full APH guide

Standex International is a Salem, New Hampshire based diversified industrial company that designs and manufactures engineered components across five segments: Electronics (electro-magnetic components, reed switches, sensors, and power magnetics), Engraving (mold texturizing and tooling), Scientific (temperature-controlled equipment for medical and life-science markets), Engineering Technologies (net and near-net formed components for aerospace, defense, energy, and space), and Specialty Solutions (refrigerated display cases, fluid pumps, and hydraulic cylinders). Over the past several years management has pivoted the portfolio toward the higher-margin Electronics platform and toward what it calls fast-growth markets such as electrification, smart infrastructure, defense, and commercialization of space, while pruning slower legacy lines.

Full SXI guide

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

• APH drivers: AI data center demand; Acquisition-led expansion.
• SXI drivers: Electronics as the growth engine; Fast-growth markets and new products.

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: The most cited risk is valuation, with the stock trading at a premium price to earnings multiple that assumes continued strong growth. For SXI, standex is a cyclical industrial, so a slowdown in end markets like appliances, autos, aerospace, or general manufacturing could pressure organic growth.

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 APH if you believe its drivers more; SXI 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 APH and SXI guides.

APH. As of July 2026 Amphenol had posted record Q1 2026 revenue of roughly ~$7.6 billion, with trailing twelve month revenue near ~$23 billion and EPS around ~$3.66. The premium P/E near ~44x reflects investor expectations for continued AI-driven growth and the added contribution from the CommScope CCS acquisition. These figures are approximate and reference the July 2026 reporting picture.

SXI. SXI reported fiscal Q3 2026 (quarter ended March 2026) sales of about $224.6 million, up roughly 8 percent year over year with about 6.5 percent organic growth and adjusted diluted EPS of $2.21. The valuation sits at a premium to typical diversified industrials, reflecting the market's confidence in the electronics-led transformation and the 2028 margin targets. Figures are approximate and drawn from recent filings and market data.

Headline figures (approximate, July 2026): APH shows revenue (ttm) ~$23 billion, net income (ttm) ~$4.3 billion, diluted eps (ttm) ~$3.66, q1 2026 revenue ~$7.6 billion; SXI shows revenue (ttm) ~$850M, fy2025 revenue ~$790M (up ~10%), adj. operating margin ~19-20%, market cap ~$3.1B.

APH and SXI 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 APH and SXI exposure against your real portfolio. It is not an investment adviser.