PBR vs XOM: 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: PBR 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. PBR and XOM 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 PBR and XOM 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.

Petroleo Brasileiro S.A. - Petrobras is the integrated energy company the Brazilian federal government controls through a majority of the voting common shares. Most of its value sits in exploration and production: deepwater fields in the Santos and Campos basins, where the pre-salt layer delivered a record ~2.78 million barrels of oil equivalent per day of the company's own output in the second quarter of 2026, out of a company total of ~3.34 million boed. Those barrels are unusually cheap to lift, under ~$6 per barrel before government take and depreciation, which is why Petrobras still earns well at oil prices that squeeze higher-cost producers. Downstream, it runs most of Brazil's refining system, which operated above 100% utilization in the quarter, alongside fuel logistics, natural gas processing and pipelines, fertilizers, and a small low-carbon portfolio. Crude exports approached ~1 million barrels per day.

Full PBR guide

Exxon Mobil is one of the world's largest publicly traded integrated oil and gas companies. It makes money across three main segments: Upstream, which finds and produces crude oil and natural gas; Product Solutions, which refines crude into fuels and manufactures petrochemicals and specialty products; and the newer Low Carbon Solutions unit, which is building carbon capture and storage, hydrogen, and lithium businesses. Being integrated means Exxon captures value along the full chain, from the wellhead to the gas pump and the chemical plant, which can smooth results when one part of the business is weak.

Full XOM guide

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

• PBR drivers: Pre-salt volumes at a cost few can match; Refining and gas as the domestic franchise.
• XOM drivers: Record low-cost production growth; Pioneer integration and cost savings.

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: State control is the risk that overshadows the rest: the federal government holds a majority of the voting common shares, appoints the board and CEO, and prior administrations have set domestic fuel prices below import parity, which turned a producer's windfall into a subsidy for drivers. For XOM, exxon's earnings are highly cyclical because they swing with oil and natural gas prices, which the company does not control and which depend on global supply, demand, and OPEC decisions.

Pick PBR if you believe its drivers more; XOM 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 PBR and XOM guides.

PBR. Petrobras reports in Brazilian reais, and screeners routinely show the real figure with a dollar sign, which is how a ~R$548 billion revenue line becomes a fictitious ~$548 billion. Converted at recent rates that is about ~$106 billion, roughly a fifth of the number some sites display. Every figure above is labelled in the currency it was reported in, and the per-ADR numbers reflect the 2-to-1 ratio (each ADS equals two ordinary shares), which is also why per-ADR earnings look double the per-share amount.

XOM. An integrated oil major like Exxon is best read through the commodity cycle rather than a single quarter. Earnings swing with oil and gas prices, so a high-price year can produce far more profit than a low-price year even with similar production. The key is whether free cash flow comfortably funds the dividend and buybacks across the cycle; Exxon's low-cost Permian and Guyana barrels are meant to do exactly that. These stocks typically trade at low-to-moderate P/E multiples because the market discounts the cyclicality and long-term energy-transition uncertainty.

Headline figures (approximate, August 2026): PBR shows revenue (ttm) ~R$548B (about ~$106B), net income (ttm) ~R$133B (about ~$26B), latest quarter (q2 2026) net income ~R$52.4B (about ~$10.4B), up ~97% year over year, adjusted ebitda (q2 2026) ~R$93.8B (about ~$18.6B); ~R$100.6B excluding one-off items; XOM shows revenue (fy2025) ~$335 billion, net income (fy2025) ~$28.8 billion, eps (fy2025, approx) ~$6.70, production ~4.7 million boe/d (record).

PBR and XOM 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 PBR and XOM exposure against your real portfolio. It is not an investment adviser.