FORM vs TSM: 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: TSM 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. FORM and TSM 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 FORM and TSM 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.

FormFactor, Inc. designs and makes electrical and optical test and measurement products used across the semiconductor lifecycle, from characterization and reliability work to high-volume production test. Its business runs in two segments: Probe Cards (the core franchise, including advanced probe cards for foundry and logic, DRAM, and flash) and Systems (probe stations, thermal subsystems, and analytical probes). The company sits between chip designers and the fabs, and its products are consumed as leading-edge nodes, high-bandwidth memory (HBM), and advanced-packaging designs ramp, making it a supplier that benefits when more complex, AI-oriented chips need testing.

Full FORM guide

Taiwan Semiconductor Manufacturing Company (TSMC) is the largest dedicated semiconductor foundry in the world. TSMC is the company that physically manufactures the chips designed by NVIDIA, AMD, Apple, Broadcom, Marvell, Qualcomm, MediaTek, and most other fabless semiconductor companies. The company operates the most advanced semiconductor manufacturing technology in the world, including leading-edge process nodes at 3nm and 2nm.

Full TSM guide

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

• FORM drivers: AI and high-bandwidth memory testing; Advanced foundry and logic nodes.
• TSM drivers: AI accelerator capacity is the binding constraint; Geographic diversification.

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: FormFactor is exposed to the semiconductor cycle, so downturns in memory or foundry capital intensity can cut orders quickly since probe cards track production volumes. For TSM, geopolitical risk is the single largest factor: any escalation between China and Taiwan would severely impact global chip supply.

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 FORM if you believe its drivers more; TSM 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 FORM and TSM guides.

FORM. FormFactor posted a record Q1 2026 with revenue near $226M, up roughly 32% year over year, led by foundry-and-logic and HBM DRAM probe cards. At a market cap around $10.5B against about $785M of trailing revenue, the stock trades at a rich price-to-sales multiple, reflecting expectations for continued AI-driven growth. Management guided Q2 2026 revenue to roughly $240M and reiterated its longer-term doubling roadmap.

TSM. TSMC's P/E of approximately 25x reflects a balance: its AI-driven leading-edge demand justifies a premium, but geopolitical risk caps the multiple compared to fabless designers like NVIDIA (~50x) or Broadcom (~45x). The risk discount is the unusually wide gap with NVIDIA's multiple.

Headline figures (approximate, APRIL 2026): FORM shows revenue (ttm) ~$785M, q1 2026 revenue ~$226M (up ~32% YoY), q1 2026 non-gaap eps ~$0.56, non-gaap gross margin ~49%; TSM shows revenue (ttm) ~$95 billion, operating margin ~45%, net income (ttm) ~$38 billion, eps (ttm) ~$7.50.

FORM and TSM 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 FORM and TSM exposure against your real portfolio. It is not an investment adviser.