OKLO vs XE: 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. OKLO and XE 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 OKLO and XE 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.

Oklo (OKLO) is a US advanced-nuclear company developing small modular fast reactors, branded the Aurora powerhouse, intended to deliver clean baseload electricity from compact, factory-buildable units. Its model is to own and operate the plants and sell power under long-term agreements rather than just sell reactors, positioning it as a power provider for data centers, industrial users, and grid customers. Oklo also pursues recycling of used nuclear fuel as part of its long-term plan. The company is pre-revenue: it has no operating commercial reactors generating power yet, and its value rests on advancing reactor design, securing US Nuclear Regulatory Commission licensing, building a supply chain and fuel access, and converting a pipeline of customer interest into deployed, revenue-generating plants. Oklo became publicly traded through a SPAC merger and trades on the New York Stock Exchange. It is closely associated with the AI-driven surge in electricity demand and the broader nuclear revival, which makes it a high-profile but speculative early-stage holding.

Full OKLO guide

X-Energy, Inc. designs advanced small modular nuclear reactors and manufactures the fuel that powers them. Its flagship Xe-100 is a high-temperature gas-cooled reactor sized at roughly 80 megawatts of electric output (200 megawatts thermal), aimed at industrial sites and data centers, and its TRISO-X fuel business makes the coated-particle fuel the reactors run on. Founded in 2009 and headquartered in Rockville, Maryland, the company is developing its first Xe-100 plant at Dow's Seadrift site on the Texas Gulf Coast under the U.S. Department of Energy's Advanced Reactor Demonstration Program, and has offtake and partnership arrangements tied to Amazon, Dow, Centrica, Talen Energy, and utilities in Kentucky.

Full XE guide

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

• OKLO drivers: AI-era electricity demand; Own-and-operate power model.
• XE drivers: AI and data-center power demand; Government backing and the Dow demonstration.

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: Oklo is pre-revenue with no operating commercial reactors, so it carries substantial execution risk: NRC licensing is rigorous and can take years, first-of-a-kind nuclear construction often runs over budget and behind schedule, and fuel supply (especially HALEU) is a real constraint. For XE, x-Energy is pre-commercial, so it generates large losses and has no proven history of building and operating reactors at scale.

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 OKLO if you believe its drivers more; XE 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 OKLO and XE guides.

OKLO. Oklo cannot be valued on current earnings because it is pre-revenue; the market prices it on the size of the clean-power opportunity, its customer pipeline, and the probability of licensing, financing, and deploying reactors. Traditional P/E does not apply, and the stock is highly speculative and volatile, often moving with nuclear-theme and AI-power sentiment. All figures are approximate and should be verified against the latest filings.

XE. As of July 2026, X-Energy trades at a very high multiple of its modest revenue because the market is pricing future reactor deployments rather than current results. Q1 2026 revenue and grant income roughly doubled year over year to about $43 million, but losses remain large as the company invests in licensing, fuel facilities, and its first plant. The April 2026 IPO added roughly $1.1 billion of cash, funding operations toward its demonstration milestones.

Headline figures (approximate, early 2026): OKLO shows stage Pre-revenue advanced-nuclear developer (no operating commercial reactors), core product Aurora powerhouse small modular fast reactor, business model Own and operate plants, sell power under long-term agreements, revenue (ttm) Minimal to none from power sales (approximate, verify); XE shows share price ~$16.50, market cap ~$6.7B, revenue + grant income (ttm) ~$117M, 2025 revenue ~$94M.

OKLO and XE 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 OKLO and XE exposure against your real portfolio. It is not an investment adviser.