OXY vs WLK: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of November 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: OXY 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. OXY and WLK 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 OXY and WLK 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.

Occidental Petroleum (Oxy) is a large US-based oil and gas company. Upstream exploration and production is the core: Oxy finds and produces crude oil and natural gas, with a flagship position in the Permian Basin, the most prolific US oil field, plus operations in the Rocky Mountains, the Gulf of America, and internationally in the Middle East and North Africa. A midstream and marketing segment moves and sells its barrels and holds an equity stake in Western Midstream (WES). Oxy is also building a carbon-management business through its 1PointFive subsidiary, developing direct air capture (DAC) facilities that pull CO2 from the atmosphere. Until January 2, 2026 it also owned OxyChem, a major chlor-alkali and PVC chemicals producer; that business was sold to Berkshire Hathaway for $9.7 billion in cash, with an Oxy subsidiary retaining OxyChem's legacy tort and environmental liabilities. Oxy is notable for Berkshire's large ownership stake and for its 2019 acquisition of Anadarko, which left it heavily indebted. Headquartered in Houston, Texas, Oxy is now led by President and CEO Richard Jackson, who succeeded Vicki Hollub during 2026.

Full OXY guide

Westlake Corporation runs two segments. Performance and Essential Materials (PEM) is the commodity side: chlor-alkali and vinyls (chlorine, caustic soda, PVC resin), olefins (ethylene, polyethylene, styrene), plus epoxy and specialty chemicals sold into packaging, pipe, coatings and wind blades. Housing and Infrastructure Products (HIP) is the downstream side: PVC pipe and fittings, siding, trim, windows, decking and roofing sold to builders, distributors and big-box retail, much of it built on resin Westlake makes itself. That vertical integration is the whole design idea. The company captures margin at both the molecule and the finished-product stage, which softens (though never removes) the swing when resin prices move. The Chao family controls roughly 72% of the shares through family entities, so public holders own a minority float in a founder-controlled company.

Full WLK guide

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

• OXY drivers: Permian Basin scale; Debt reduction and capital return.
• WLK drivers: The three-pillar self-help program; Vinyls and olefins pricing off a cyclical trough.

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: Oxy's earnings and cash flow are highly sensitive to oil and gas prices, which are volatile and outside its control. For WLK, the single biggest risk is that Q2 2026 was a price spike, not a floor: PEM's margin expansion was driven substantially by oil prices elevated on Middle East conflict, and if crude retreats while global PVC and polyethylene capacity stays long, the spread compresses fast.

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 OXY if you believe its drivers more; WLK 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 OXY and WLK guides.

OXY. At $61.26 on October 16, 2026, Oxy trades near 17 times trailing and 13 times forward earnings, with the forward figure resting on consensus EPS of about $4.71 for 2027 after a high-price 2026. Valuation is dominated by oil-price sensitivity and balance-sheet repair: the OxyChem proceeds and Q2's $3.0 billion of free cash flow before working capital sped up debt reduction, while carbon capture adds long-dated optionality. Mean analyst targets sit near $69.

WLK. Trailing earnings are negative because of the 2025 write-downs, so the trailing P/E is meaningless and the market is pricing off forward estimates at roughly 22 times next year's expected EPS of about $2.80, with the stock near 0.9 times book value and about 11 times trailing EBITDA. At about $62 on October 16, 2026 against a 52-week range of roughly $56 to $124, the shares have given back the post-Q2 bounce. Cyclical chemical names look expensive on trough earnings and cheap on peak earnings, which is exactly the inversion to keep in mind here, and the October 29 report will show how much of Q2's margin carried into Q3.

Headline figures (approximate, October 2026): OXY shows revenue (ttm) ~$24 billion; Q2 2026 ~$8.3 billion (up ~53% YoY), net income (ttm) ~$3.4 billion, EPS ~$3.52, operating margin ~45% (TTM), highly oil-price dependent, production (q2 2026) ~1,433 thousand barrels of oil equivalent per day; WLK shows revenue (ttm) ~$11.3B (Q2 2026 +~11% YoY), q2 2026 net sales / ebitda ~$3.27B / ~$679M, q2 2026 eps (diluted) ~$2.01 vs ~$1.89 consensus, net income (ttm) ~-$1.23B (2025 impairments).

OXY and WLK 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 OXY and WLK exposure against your real portfolio. It is not an investment adviser.