ITW vs WDFC: 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: ITW 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. ITW and WDFC 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 ITW and WDFC 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.

Illinois Tool Works Inc. (NYSE: ITW) is a Glenview, Illinois-based diversified manufacturer founded in 1912 that makes engineered fasteners, components, equipment, and consumable systems for customers around the world. The company is organized into seven segments: Automotive OEM, Test & Measurement and Electronics, Food Equipment, Polymers & Fluids, Welding, Construction Products, and Specialty Products. Its defining feature is the 80/20 operating model, a discipline of focusing on the roughly 20% of products and customers that drive about 80% of value, which has produced some of the highest and most consistent operating margins in the industrial sector, near 26%. ITW competes largely on proprietary, patent-protected niche products embedded in customer processes, which gives it pricing power and sticky demand.

Full ITW guide

WD-40 Company makes multi-purpose maintenance products (the flagship WD-40 spray, the WD-40 Specialist line of silicone lubricants, white lithium grease and contact cleaners, plus the 3-IN-ONE brand) alongside a smaller homecare and cleaning products group. Roughly 97% of revenue now comes from its core maintenance products, sold in more than 175 countries and produced through a capital-light, outsourced-manufacturing model that lets the company focus on brand, formulation and distribution.

Full WDFC guide

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

• ITW drivers: Margin expansion from the 80/20 model; Diversified, niche-leading segments.
• WDFC drivers: Core maintenance-product strength; Pricing power and margin recovery.

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: ITW's end markets are mature and cyclical, so a downturn in global auto production, industrial capital spending, or construction activity would pressure organic sales, which already grow only in the low single digits. For WDFC, wD-40 depends heavily on a single flagship brand, so any reputational, formulation or regulatory issue with that product would be outsized.

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 ITW if you believe its drivers more; WDFC 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 ITW and WDFC guides.

ITW. ITW is usually valued as a quality industrial compounder, so investors focus less on revenue growth and more on margins, free cash flow, return on invested capital, and per-share earnings growth. Its operating margin near 26% is among the highest in diversified industrials, and the forward price-to-earnings ratio in the low twenties reflects a premium the market assigns to that consistency and the long dividend record. Because organic growth is modest, the earnings-per-share story leans on margin expansion and buybacks, which is why guidance for about 7% EPS growth in 2026 comes alongside only 2 to 4% expected revenue growth.

WDFC. As of early July 2026 WDFC traded around $246 with a market cap near $3.3 billion, a trailing P/E in the high 20s and a forward dividend yield around 1.7%. The premium multiple reflects the market pricing in the franchise's consistency and high returns on capital rather than rapid growth.

Headline figures (approximate, JULY 2026): ITW shows revenue (fy2025) ~$16 billion, up ~0.9% YoY, operating margin (fy2025) ~26.3%, gaap eps (fy2025) ~$10.49, 2026 eps guidance ~$11.00 to $11.40 (up ~7% at midpoint); WDFC shows q2 fy2026 net sales ~$161.7M (+11% YoY), fy2026 sales guidance ~$630M-$655M, q2 fy2026 gaap eps ~$1.50 (-32% YoY), market cap ~$3.3B.

ITW and WDFC 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 ITW and WDFC exposure against your real portfolio. It is not an investment adviser.