OXY vs WLK: How Occidental Petroleum and Westlake Corporation Compare (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: 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 with three main businesses. 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 Mexico, and internationally. Its chemicals arm, OxyChem, is a major producer of chlor-alkali and PVC-related chemicals. Oxy is also building a carbon-management business through its 1PointFive subsidiary, developing direct air capture (DAC) facilities that pull CO2 from the atmosphere. The company makes most of its money selling oil and gas, so cash flow swings with commodity prices. Oxy is notable for Berkshire Hathaway's large ownership stake and for its 2019 acquisition of Anadarko, which left it heavily indebted. Headquartered in Houston, Texas, Oxy has since prioritized cutting debt and returning cash, while positioning carbon capture as a long-term option.

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. Oxy's valuation is dominated by oil-price sensitivity and balance-sheet repair. Strong free cash flow at favorable commodity prices funds debt reduction and capital return, while the carbon-capture business adds long-dated optionality. The financial profile is that of a leveraged, cyclical Permian producer working to deleverage.

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, plus about 4 times EV to a normalizing EBITDA run rate if the second-quarter pace held. The share count is about 128 million and the stock trades near $80 against a 52-week range of roughly $56 to $124, so it has bounced hard off the low without recovering the high. Cyclical chemical names look expensive on trough earnings and cheap on peak earnings, which is exactly the inversion to keep in mind here.

Headline figures (approximate, early 2026): OXY shows revenue (ttm) ~$27 billion, operating margin ~20%, highly oil-price dependent, production ~1.2+ million barrels of oil equivalent per day, free cash flow strong at mid-cycle oil prices; WLK shows revenue (ttm) ~$11.3B, q2 2026 net sales / ebitda ~$3.27B / ~$679M, q2 2026 eps (diluted) ~$2.01, net income (ttm) ~-$1.2B (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.