BELFB vs OUST: 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. BELFB and OUST 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 BELFB and OUST 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.

Bel Fuse designs and manufactures a broad range of electronic components used inside other companies' equipment. Its products span three product groups: Power Solutions and Protection (front-end, board-mount and industrial power supplies plus circuit-protection fuses), Connectivity Solutions (fiber-optic, copper, RF and RJ connectors and cable assemblies), and Magnetic Solutions (integrated connector modules, transformers and inductors). These parts go into networking, telecom, computing, industrial, defense, commercial aerospace, transportation and eMobility systems, which makes Bel a supplier to the broader electronics and infrastructure build-out rather than a consumer-facing brand.

Full BELFB guide

Ouster designs and sells digital lidar sensors, the laser-based 3D perception hardware that lets machines see and map their surroundings. Its addressable markets span four verticals: robotics and drones, industrial automation, smart infrastructure (such as traffic, security, and crowd analytics), and automotive. The company scaled meaningfully through its 2023 merger with Velodyne, which broadened its product line and customer base, and it now ships tens of thousands of sensors per quarter under product families like the OS series and the newer Rev8 line with native color sensing. Ouster frames itself as a beneficiary of the broader "Physical AI" wave, where robots and autonomous systems need reliable spatial perception.

Full OUST guide

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

• BELFB drivers: Mix shift to aerospace and defense; Data-center and AI-infrastructure demand.
• OUST drivers: Physical AI and robotics demand; Product cadence and margin improvement.

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: Bel Fuse's demand is cyclical and project-driven, so orders can fall quickly when networking, industrial or computing customers cut spending or work down inventory. For OUST, ouster remains unprofitable, with a trailing net loss around $56 million and meaningful free cash flow burn, and it is not forecast to reach profitability for at least a couple of years.

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 BELFB if you believe its drivers more; OUST 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 BELFB and OUST guides.

BELFB. Bel reported record full-year 2025 sales of about $675.5 million, up roughly 26%, with GAAP net earnings of about $61.5 million and EPS near $4.87, and gross margin expanding to about 39%. Fourth-quarter GAAP results included a $13.1 million non-cash impairment tied to its Innolectric equity investment, while non-GAAP quarterly earnings still rose year over year. After a large share-price run (a 52-week range from roughly $92 to over $314), the trailing P/E has re-rated well above its historical norm, and the dividend is small relative to the share price.

OUST. OUST trades at a high multiple of trailing sales (roughly mid-teens times revenue), reflecting expectations of continued rapid growth rather than current earnings. The combination of accelerating revenue, improving margins, and a strong cash position is offset by ongoing losses and share dilution. Figures are approximate and as of May 2026.

Headline figures (approximate, FEBRUARY 2026): BELFB shows revenue (fy2025) ~$675.5 million, net earnings (fy2025, gaap) ~$61.5 million, eps (fy2025) ~$4.87, adjusted ebitda (fy2025) ~$142.9 million; OUST shows revenue (ttm) ~$185M, q1 2026 revenue ~$48.6M (up ~49% YoY), net loss (ttm) ~$56M, gross margin ~43%.

BELFB and OUST 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 BELFB and OUST exposure against your real portfolio. It is not an investment adviser.