NOV vs SLB: 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. NOV and SLB 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 NOV and SLB 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.

NOV Inc, known as National Oilwell Varco until its 2021 rebrand, is a Houston-based designer and manufacturer of equipment, technology, and components used across the oil and gas industry. The company operates through two reporting segments: Energy Equipment, which builds capital equipment for offshore rigs, subsea production, floating and land drilling systems, wind installation vessels, and process and flow technologies, and Energy Products and Services, which supplies drill pipe, downhole tools, drill bits, coiled tubing, composite pipe, and aftermarket parts and repair. NOV sells into a global customer base of drilling contractors, national and international oil companies, and service firms, and increasingly positions parts of its portfolio toward offshore wind and industrial process markets.

Full NOV guide

SLB (formerly Schlumberger) is a multinational oilfield services and energy technology company founded in France in 1926 and now incorporated in Curacao, with principal offices in Paris, Houston, London, and The Hague. It operates across four divisions: Well Construction, Reservoir Performance, Production Systems, and a newly reported standalone Digital division, providing services that span the full upstream oil and gas lifecycle from seismic imaging and reservoir characterization through drilling, completions, and production optimization, as well as emerging capabilities in carbon capture, geothermal, and AI-powered data platforms. The company operates in more than 120 countries and employs people of more than 140 nationalities, giving it the broadest international footprint in its sector. In July 2025 SLB closed its acquisition of ChampionX in an all-stock deal valued at approximately $7.75 billion, its largest purchase since Cameron International, adding production chemistry and artificial lift capabilities. CEO Olivier Le Peuch, who joined the company in 1987 as an electrical engineer and has held the top role since August 2019, has led a deliberate pivot toward platform-based digital solutions and energy transition technologies, culminating in the 2022 rebrand from Schlumberger to SLB.

Full SLB guide

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

• NOV drivers: Offshore and International Equipment Cycle; Backlog and Book-to-Bill Visibility.
• SLB drivers: International Upstream Spending Cycle; Digital Division as a High-Margin Growth Engine.

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 largest risk is the oil and gas capital-spending cycle: when operators and drilling contractors cut budgets, demand for NOV's equipment, drill pipe, and aftermarket parts falls quickly, and global drilling activity already declined about 7% in 2025. For SLB, the primary risk is oil price volatility: decisions by OPEC+ on production quotas directly influence the capital expenditure budgets of SLB's E&P clients, and a sustained decline in crude prices could quickly reverse the international spending cycle that underpins the bull case.

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 NOV if you believe its drivers more; SLB 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 NOV and SLB guides.

NOV. NOV's full-year 2025 revenue of roughly $8.74 billion was down about 1% year over year, a resilient outcome against a 7% drop in global drilling activity, driven by offshore capital-equipment strength in the Energy Equipment segment. The unusually high trailing P/E of roughly 70x to 75x reflects a low denominator, with 2025 net income of only $145 million (~$0.39 per diluted share), so the forward multiple near 18x and cash-flow metrics are more informative than trailing earnings. Q1 2026 was soft, with EPS of $0.05 missing consensus of $0.16 amid Middle East disruptions, and management guided 2026 to slightly lower revenue with EBITDA in line to modestly below 2025.

SLB. SLB's full-year 2025 revenue of approximately $35.7 billion reflects modest single-digit growth over fiscal 2024's $36.3 billion, with margins under modest pressure as international activity moderated and the ChampionX integration costs flowed through. The trailing P/E of roughly 17x to 22x is broadly in line with SLB's five-year average and represents a meaningful discount to the company's 10-year historical average, which some analysts interpret as a valuation opportunity if the digital re-rating thesis plays out. Operating margin weakened to approximately 11.9% on a GAAP basis in the most recent reported period, underscoring that the earnings quality story depends heavily on the pace of Digital division scaling and ChampionX synergy realization.

Headline figures (approximate, JULY 2026): NOV shows revenue (fy 2025) ~$8.74 billion, revenue (q1 2026) ~$2.05 billion, adjusted ebitda (fy 2025) ~$1.03 billion, net income (fy 2025) ~$145 million (~$0.39 diluted EPS); SLB shows revenue (fy 2025) ~$35.7 billion, revenue (q1 2026) ~$8.72 billion, adjusted ebitda margin (h1 2025) ~23.9%, diluted eps (ttm, dec 2025) ~$2.26 (GAAP).

NOV and SLB 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 NOV and SLB exposure against your real portfolio. It is not an investment adviser.