Sodium coolant. 4th November 2026 Plans to clean up coolant from a Japanese nuclear reactor have been opposed by more than 900 people, a campaigning group has said. Cavendish Nuclear and Amentum want to build a facility at the Port of Workington, Cumbria, to support the decommissioning of the Monju Prototype Fast Breeder Reactor (FBR), in Fukui Prefecture, Japan. Marianne Birkby, of Radiation Free Lakeland, said the scheme was "dangerous" and its online petition, calling for the waste to stay in Japan, had been signed by hundreds of people. Alkali Metal Processing (AMP), the company behind the project, said it wanted the work to take place in the county because of its specialist expertise. Cumberland Council, which owns the port, said it would use £4.5m of Town Deal funding to prepare land at the port and neighbouring Oldside for wider development. The plan involves bringing the coolant to Workington where it would be converted into sodium hydroxide, also known as caustic soda, which is used in cleaning products and manufacturing. AMP, a joint venture between Cavendish Nuclear and Amentum said the work was being undertaken in the UK because of the "specialist technical expertise across its respective organisations".

Amentum (NYSE: AMTM) has expanded its Colorado Springs presence by moving into the Catalyst Campus for Technology and Innovation. The company says the new facility will speed up defence and space innovation. The site allows secure, daily work on sensitive defence and space programmes. It supports Amentum's work in missile defence, artificial intelligence, cyber operations, and space mission support. "This collaborative environment enables government, technology, industry and academic partners to work side by side on the nation's most complex technical challenges," said Mark Walter, president of Amentum's Engineering and Technology business. The campus sits between Cheyenne Mountain Complex, Peterson Space Force Base, and Schriever Space Force Base. That puts Amentum close to key government, industry, and academic partners.

Amentum expands defense and space operations in Colorado Springs. Investment at Catalyst Campus to Advance National Security Missions Published on 10/30/2026 at 10:31 am EDT Business Wire Amentum (NYSE: AMTM) has expanded its presence in Colorado Springs to the Catalyst Campus for Technology and Innovation to accelerate defense and space innovation. The new facility enhances Amentum's ability to deliver advanced engineering and innovative technology solutions, deepen defense partnerships, and accelerate the development of next-generation capabilities. Catalyst Campus Colorado Springs, Colorado "Amentum's presence at the Catalyst Campus for Technology and Innovation strengthens our ability to innovate alongside key partners to accelerate the delivery of critical capabilities to the warfighter," said Mark Walter, president of Amentum's Engineering and Technology business. "This collaborative environment enables government, technology, industry and academic partners to work side by side on the nation's most complex technical challenges. What matters most isn't simply being near critical missions - it's bringing together the right people, in a secure, innovative setting, with the cutting-edge tools they need to rapidly turn ideas into operational capability." The new facility at Catalyst Campus enables secure, day-to-day engagement on sensitive defense and space programs and provides high-tech work environments purpose-built for rapid engineering, modernization, and mission-critical technology development. These capabilities advance Amentum's work in missile defense, artificial intelligence, cyber operations, and space mission support - areas central to countering emerging threats and maintaining U.S. technological superiority. "Catalyst Campus was created to connect organizations that might not otherwise work side by side and help move technology from concept to operations," said Amy Abbott, executive director, Catalyst Campus for Technology and Innovation. "Amentum's expanded footprint infuses that ecosystem with deep engineering and mission expertise." Positioned within the corridor of Cheyenne Mountain Complex, Peterson Space Force Base, and Schriever Space Force Base, Catalyst Campus places Amentum at the center of key defense and space activities. This proximity strengthens mission engagement and collaboration with government agencies, industry innovators, and academic partners, reinforcing Amentum's role in advancing critical national security capabilities. 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 approximately 50,000 employees in approximately 80 countries across all 7 continents. Visit us at amentum.com to learn how we advance the future together. Follow @Amentum_corp on X Follow Amentum on LinkedIn Forward-Looking Statements 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 fiscal year ended November 25, 2025, which can be found at the SEC's website at sec.gov or the Investor Relations portion of our website at 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. 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