Westinghouse and Amentum Partner to Expand Delivery Capacity for APX Fleet Deployment

CRANBERRY TOWNSHIP, Penn.--(BUSINESS WIRE)--Aug 4, 2026--

Westinghouse Electric Company and Amentum (NYSE: AMTM), a global leader in advanced engineering and technology solutions, have entered into a series of agreements supporting the Westinghouse APX technology platform. These agreements augment Westinghouse capabilities to support fleet-scale deployment of its AP1000 ® reactor while also advancing the development of the AP300™ small modular reactor (SMR).

This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20260804552631/en/

“Westinghouse is pursuing a disciplined APX technology strategy built on the proven AP1000 reactor and extended through the AP300 SMR,” said Dan Sumner, President and Chief Executive Officer of Westinghouse. “We continue to make investments to strengthen our proven APX platform, and our ongoing collaboration with Amentum is expected to accelerate the licensing of the AP300 SMR with the NRC. Separately, our two companies will work together to enhance our engineering and execution capabilities for delivering 1-gigawatt reactors at scale.”

“Amentum’s expertise spans the full spectrum of the nuclear project lifecycle, accelerating the development and deployment of advanced nuclear solutions, strengthening energy security and powering the growth of AI and other energy critical industries,” said John Heller, Amentum Chief Executive Officer. “There is an expanding global market for firm baseload power, and our collaboration with Westinghouse will enable us to help meet that demand.”

The Westinghouse APX strategy offers a single technology platform enabling the fleet delivery of the AP1000 reactor and the AP300 SMR. The APX platform is based on the proven innovations and technology of the AP1000 plant, including validated engineering, components, licensing strategies, fuel design and supply chain. The APX strategy offers the grid-scale, commercially available AP1000 reactor for near-term global fleet deployments, while developing the AP300 SMR to address additional market segments with smaller energy requirements. Amentum’s engineering capacity and nuclear experience will strengthen the industrial base and delivery model, enabling the repeatable deployment of the APX technology suite.

Under the most recent agreement, Westinghouse and Amentum will collaborate to obtain regulatory approval for the AP300 SMR by the U.S. Nuclear Regulatory Commission, a major milestone in bringing the technology to market.

Westinghouse and Amentum have an established history of partnership on nuclear projects worldwide, including nuclear power and decommissioning projects in the United States, United Kingdom, Poland, Slovakia, Lithuania and South Africa.

About Westinghouse

Westinghouse Electric Company is the future of energy, providing reliable, innovative nuclear technologies and services globally. Westinghouse pioneered commercial nuclear power, delivering the world’s first commercial pressurized water reactor in 1957. The company has industrialized more nuclear reactors than any other company, with its technology forming the basis of half of the world's operating nuclear plants. More than 140 years of innovation makes Westinghouse the preferred partner for advanced technologies covering the complete nuclear energy life cycle. For more information, visit www.westinghousenuclear.com and follow us on Facebook, LinkedIn and X.

About Amentum

Amentum is a global leader in advanced engineering and innovative technology solutions, trusted by the United States and its allies to address their most significant and complex challenges in science, security and sustainability. Our people apply undaunted curiosity, relentless ambition and boundless imagination to challenge convention and drive progress. Our commitments are underpinned by the belief that safety, collaboration and well-being are integral to success. Headquartered in Chantilly, Virginia, we have more than 50,000 employees in approximately 70 countries across all seven continents.

Visit us at www.amentum.com to learn how we advance the future together.

Follow @Amentum_corp on X

Follow Amentum on LinkedIn

This press release contains or incorporates by reference statements by Amentum Holdings, Inc. (the “Company”) that relate to future events and expectations and, as such, constitute “forward-looking statements” as that term is defined in the Private Securities Litigation Reform Act of 1995 and other federal securities laws. These forward-looking statements may be characterized by terminology such as “believe,” “project,” “expect,” “anticipate,” “estimate,” “forecast,” “outlook,” “target,” “endeavor,” “seek,” “predict,” “intend,” “strategy,” “plan,” “may,” “could,” “should,” “will,” “would,” “will be,” “will continue,” “will likely result,” or the negative thereof or variations thereon or similar terminology generally intended to identify forward-looking statements. All statements, other than historical facts, including, but not limited to, statements regarding the anticipated work and revenue under the awarded contract, and the Company’s objectives, expectations and intentions, applicable legal, economic and regulatory conditions, and any assumptions underlying any of the foregoing, are forward-looking statements.

A number of important factors could cause actual results to differ materially from those contained in or implied by these forward-looking statements, including those factors discussed in our filings with the Securities and Exchange Commission (SEC), including, among others: the occurrence of an accident or safety incident; the ability of the Company to control costs, meet performance requirements or contractual schedules; and other factors set forth under Item 1A, Risk Factors in our Annual Report on Form 10-K for the fiscal year ended November 25, 2025, which can be found at the SEC’s website at www.sec.gov or the Investor Relations portion of our website at www.amentum.com. Any forward-looking statement speaks only as of the date on which it is made, and the Company assumes no obligation to update or revise such statement, whether as a result of new information, future events or otherwise, except as required by applicable law.

Westinghouse is collaborating with Amentum for its APX technology strategy, augmenting Westinghouse capabilities for fleet-scale deployment of the AP1000® reactor (left) while advancing development of the AP300™ small modular reactor (right).

Ukrainian drone attacks in the region around Moscow killed five people, local officials said Tuesday, while authorities in Ukraine said Russian aerial strikes there also caused at least five civilian deaths.

Since Russia’s invasion more than four years ago, Ukraine has developed long-range drones that can hit targets deep inside Russia. In the past year, they have battered oil facilities, major storage depots and other key infrastructure.

More than 16,000 civilians have been killed in Ukraine since the start of Russia’s full-scale invasion, according to the United Nations, with the vast majority of them occurring in areas under the Ukrainian government’s control. Casualties have risen steadily each year.

Meanwhile, escalating attacks by both sides on shipping in the Black Sea has reawakened fears that global food security could be put at risk.

The death toll from a drone strike Monday in the Russian Black Sea resort of Arkhipo-Osipovka rose to seven, including four children, regional authorities said.

On Tuesday morning, Krasnodar regional authorities updated the number of wounded to 58, with 21 of them hospitalized.

Footage circulating online showed a drone slamming into a crowded beach, with what sounded like rapid gunfire ringing in the background. Ukraine has not commented on the strike.

A Ukrainian drone attack in the Moscow region, which surrounds but doesn’t include the Russian capital, killed five people and wounded 10 others wounded on Tuesday morning, the region’s governor Andrei Vorobyov said.

Most damage from the attack occurred in the Chekhov municipal district, where several fires erupted at the Novoselki industrial zone, Vorobyov said.

In the latest in a string of attacks attack on Russia’s biggest online retailer, Wildberries said Tuesday that its warehouse in the Leningrad region, which lies adjacent to St. Petersburg, was on fire.

In the Tver region, located between Moscow and St. Petersburg, drone debris inflicted “partial” damage on a wall of a Wildberries warehouse in the village of Emmaus, the region’s governor Vitaly Korolyov said.

Ukrainian drones have over the past 18 days targeted 15 Wildberries warehouses, 13 of which have caught fire, Ukraine’s Unmanned Systems Forces commander Robert Brovdi said. Ukrainian officials say the company provides goods that can be used by the Russian military. Kyiv is also keen to unsettle the Russian public with high-profile attacks.

Overall, the Russian Defense Ministry reported Tuesday morning that its air defenses shot down 320 Ukrainian drones overnight.

The Russian Defense Ministry said in a statement Tuesday that its forces the previous night “continued to strike Ukrainian ports, vessels, and port infrastructure” used by Kyiv’s army.

In the port of Chornomorsk, in Ukraine’s southern Odesa region, the Russian military said it struck an automobile components plant and a port terminal, where the Ukrainian forces “were repairing military vehicles and storing ammunition and fuel.”

In the southern port of Mykolaiv, a bulk carrier with military cargo was damaged, while in Pivdennyi, another Ukrainian Black Sea port, a vessel unloading military cargo was hit, according to the statement.

The ministry also said two bulk carriers taking weapons and military equipment to Ukrainian ports were damaged at sea, south of Odesa.

Turkey on Tuesday repeated its appeal for both Russia and Ukraine to ensure the safety of navigation in the Black Sea after two Turkish-owned ships were attacked by drones after leaving the Russian port of Novorossiysk.

A Turkish Foreign Ministry statement expressed concerns that the war is increasingly spreading across the Black Sea, threatening civilian shipping, and warned such incidents could have broader consequences, including for the global food supply, as important amounts of grain, fertilizers and other key produce moves through those waters.

Russian attacks on Mykolaiv, including its port, killed an 89-year-old woman and wounded seven other people aged between two and 83, Ukrainian regional officials said.

The Russian strike on civilian infrastructure in southern Odesa region destroyed a private home and wounded two people, according to Oleh Kiper, head of the regional military administration.

Elsewhere, in Ukraine’s northern Sumy region, six Russian glide bombs killed two girls aged 5 and 10 and an elderly woman, Oleh Hryhorov, head of the Sumy regional military administration, said.

Russian forces also struck Kharkiv and 18 towns and villages across the northern region over the previous 24 hours, killing one person and injuring seven others, including an 8-year-old child, said Oleh Syniehubov, head of the Kharkiv regional military administration.

Strikes in Balakliia, also in the Kharkiv region, significantly damaged an apartment building, a library, three stores and more than 10 houses, wounding two women, local authorities said.

Two 250-kilo (550 lbs) glide bombs struck Kramatorsk in the eastern Donetsk region of Ukraine on Tuesday morning, injuring 22 people, local officials said.

Kramatorsk sits at the northern end of Ukraine’s Fortress Belt, where Western analysts say Russia’s army is making a renewed effort to break through after four years of attrition.

Vadym Filashkin, head of the regional military administration, urged people remaining near the front line to evacuate, saying evacuation is free and that authorities would help with transportation, housing and other necessary support.

Follow the AP’s coverage of the war in Ukraine at https://apnews.com/hub/russia-ukraine

In this photo provided by the Ukrainian Emergency Service, private houses destroyed following a night Russian missile attack are seen in Odesa region, Ukraine, Tuesday, Aug. 4, 2026. (Ukrainian Emergency Service via AP)

In this photo provided by the Ukrainian Emergency Service, a firefighter puts out a fire following a Russian missile attack in Dnipropetrovsk region, Ukraine, Tuesday, Aug. 4, 2026. (Ukrainian Emergency Service via AP)