CEG vs OPLN: 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.

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. CEG and OPLN 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 CEG and OPLN 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.

Constellation Energy (CEG) is the largest producer of carbon-free electricity in the United States, operating the country's biggest fleet of nuclear power plants alongside hydro, wind, and solar assets. Spun off from Exelon in 2022, it generates and sells power and provides energy services to commercial, industrial, government, and residential customers. Constellation's nuclear fleet produces large, steady volumes of around-the-clock, low-carbon electricity, which has become increasingly valuable as datacenters, electrification, and AI computing drive up demand for reliable clean power. The company has pursued long-term power-supply agreements with large energy buyers, including technology companies seeking carbon-free electricity for datacenters, and announced an agreement to acquire Calpine, a major natural-gas and geothermal generator, to broaden its generation mix. Headquartered in Baltimore, Maryland, Constellation benefits from federal clean-energy incentives, including production tax-credit support for existing nuclear plants.

Full CEG guide

OPENLANE runs the wholesale layer of the used-car business, the market where dealers, rental fleets, leasing companies and captive lenders sell vehicles to other dealers rather than to consumers. It was KAR Auction Services until a 2023 rename, and it sold its US physical auction sites (the ADESA locations) to Carvana in 2022, leaving a business that is digital in North America and part physical in Europe. Two segments do the work. Marketplace lists and sells the cars, earning auction and related fees, SaaS and services revenue, and a small amount of outright vehicle resale. Finance is AFC, a floorplan lender extending short-term inventory-secured credit to independent dealers so they can buy at auction. In the June 2026 quarter Marketplace booked ~$447.3M of revenue against Finance's ~$107.3M, yet Finance carried the larger operating profit, ~$38.6M versus ~$28.9M.

Full OPLN guide

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

• CEG drivers: Datacenter and AI power demand; Nuclear fleet value and clean-energy support.
• OPLN drivers: The off-lease inflection in commercial consignment; US dealer-to-dealer share gains.

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: Constellation has merchant exposure, so its results depend partly on wholesale power and commodity prices, which can be volatile. For OPLN, the commercial volume surge leaned partly on onboarding a single new private-label customer, so concentration matters and a lost contract would show up quickly in reported units.

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 CEG if you believe its drivers more; OPLN 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 CEG and OPLN guides.

CEG. Constellation trades at a higher multiple than most regulated utilities because investors price in growth from AI and datacenter power demand and the premium value of carbon-free baseload generation. That re-rating embeds optimism about long-term clean-power contracts; the multiple can compress if power-demand growth or policy support disappoints. All figures are approximate and move with power prices and the share price; verify current numbers before relying on them.

OPLN. Trailing GAAP EPS of about -$0.59 is misleading on its own: consolidated net income over the last four quarters was roughly $200M, and the negative figure comes from a ~$242.2M premium recorded in Q4 2025 when the Series A convertible preferred was repurchased for ~$559.3M. Guided 2026 diluted EPS of ~$1.23 to ~$1.33 puts the stock near ~26x the midpoint, or closer to ~23x on the company's Operating Adjusted EPS range of ~$1.40 to ~$1.50. The enterprise-value multiple excludes AFC's ~$1.89B of obligations collateralized by finance receivables, which are secured by ~$2.62B of managed receivables and are conventionally treated as funding rather than corporate debt.

Headline figures (approximate, early 2026): CEG shows revenue (ttm) ~$23-25 billion (approximate, verify), position Largest US producer of carbon-free electricity, fleet Largest US nuclear fleet plus hydro, wind, solar, p/e (ttm) ~25-30x or higher (approximate, verify); OPLN shows revenue (ttm) ~$2.08B, q2 2026 revenue ~$554.6M, up ~15% year over year, q2 2026 net income / adjusted ebitda ~$44.3M / ~$103M, 2026 company guidance adjusted EBITDA ~$385M to ~$400M; diluted EPS ~$1.23 to ~$1.33.

CEG and OPLN 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 CEG and OPLN exposure against your real portfolio. It is not an investment adviser.