ROCKVILLE, Maryland, May 3, 2026, 17:05 EDT
- X-Energy ended Friday at $30.53—up roughly 33% from its $23 IPO, though still trailing last week’s peak.
- LG&E and KU, utilities based in Kentucky, are weighing the possibility of using X-Energy’s Xe-100 small modular reactor.
- No commercial reactor has been delivered so far, with licensing hurdles, fuel supply, and construction still standing as major obstacles.
X-Energy Inc. wrapped up its debut week trading as a public company solidly above its IPO mark, a boost for the Amazon-backed nuclear firm as it moves from client feasibility work toward actual reactor construction. Shares settled at $30.53 Friday—off 3.8% for the day, but still standing roughly 33% higher than the $23 offering price.
The company’s latest utility move lands in Kentucky, where Louisville Gas and Electric and Kentucky Utilities are teaming up with X-Energy on initial feasibility studies for the Xe-100, a small modular reactor, or SMR. These compact nuclear units are designed for scalable, repeatable builds. According to the companies, the review will assess grid demands and major users like data centers.
Just weeks ago, Kentucky Governor Andy Beshear put his signature on a nuclear site-readiness law. The new measure sets up grants reaching $25 million per project for early site permits, construction permits, or combined operating licenses related to nuclear efforts, as detailed in the state legislature’s summary.
LG&E and KU President John R. Crockett III said nuclear is on the table as the utilities map out their long-term strategy. On the X-Energy side, CEO J. Clay Sell pointed to Kentucky’s workforce as “a strong foundation” for assessing advanced nuclear rollout. X-energy
X-Energy brought in roughly $1.02 billion in its upsized IPO, moving 44.3 million shares at $23 apiece, according to Reuters. The shares jumped 30.9% on April 24, sending its market cap to about $11.9 billion after the Nasdaq open—underscoring the intense appetite for firms touting non-stop power aimed at AI and cloud computing.
Sell told Reuters the listing boosts the company’s balance sheet and should “reduce the risk of getting to scale.” X-Energy’s roster of backers and customers includes Amazon, Dow, and Centrica, according to Reuters. Reuters
Competition in the sector is heating up. According to Reuters, Big Tech has thrown support behind nuclear ventures like TerraPower, Oklo, X-Energy and Kairos Power. Still, none of the U.S. modular reactor firms has started commercial electricity output. Analysts told Reuters long-term purchase agreements could unlock financing, but challenges linger—construction costs, regulatory approvals, and fuel supply are all sticking points.
X-Energy is betting on a combination of reactor hardware and specialized fuel. Its Xe-100 high-temperature gas-cooled reactor puts out 80 megawatts of electricity per unit. Plants can come in four-unit or 12-unit configurations; a four-pack delivers 320 megawatts, according to the company. The developer is pursuing over 11 gigawatts of potential nuclear capacity through projects in both the U.S. and Britain.
Texas is shaping up as a key test case. Last month, Fluor announced it landed a contract to back X-Energy’s proposed development at Dow’s Seadrift facility. Plans call for four 80-megawatt units generating both power and industrial steam. According to Fluor, a construction permit application went to the U.S. Nuclear Regulatory Commission in March 2025 and is still awaiting a decision.
The outlook remains murky. In its IPO filing, X-Energy acknowledged it hasn’t yet delivered a commercial Xe-100 reactor or made any final calls on deployment investments, cautioning that timelines, costs, and performance for first-of-a-kind projects are all up in the air. The document flagged hurdles too—regulatory signoffs, fuel sourcing, specialized suppliers, and construction risks all made the risk list.
The stock’s first week was a tale of two moves. Shares jumped to $37.10 on April 28, but by Friday had retreated to $30.53. That’s still a healthy premium to the IPO price, though the drop from the week’s top tick comes to about 18%.
X-Energy has already secured backing from public investors—the debate isn’t about funding anymore. Now, the real challenge lies in getting past paperwork and studies, and actually building: lining up steel, securing fuel, getting those plants licensed and online with help from utility partners and regulators.
