Nuclear data center win meets government budget drag
- Backlog remains near $48 billion, giving Amentum a long runway of revenue visibility.
- A major new Department of Energy project will build nuclear and AI data centers at the Savannah River Site.
- Near-term growth is slow, and a NASA workforce in-sourcing plan is now expected to reduce fiscal 2027 revenue by 3 percent.
- Debt is falling fast, and management expects to hit a less than 3.0x net leverage target by the end of fiscal 2026.
- The stock gets credit for growth potential in new markets, but weak recent performance keeps Finn cautious.
Big backlog and new commercial options
The bull case is getting clearer in high-growth markets. Amentum ended fiscal Q2 2026 with nearly $48 billion of backlog, and it just secured a major strategic win in Q3. The Department of Energy picked the company to lead a multi-gigawatt nuclear and AI data center project at the Savannah River Site. This project is expected to yield over $1 billion in revenue and could introduce new commercial ways to make money, like monetizing tokens or electricity.
Management has also put a clearer number on its faster-growth markets. Nuclear, space, and critical digital infrastructure are described as a $4 billion-plus annual revenue business with margins above the company average.
The bear case revolves around near-term government headwinds. Normalized revenue growth was a quiet 1 percent in Q3. Management also raised its estimate of the revenue hit from a NASA workforce in-sourcing move to 3 percent for fiscal 2027, up from a prior 1 percent view. This shows that while backlog is huge, government customers can still pull work back inside their agencies.
So the setup is balanced. The company has a massive work pipeline and real growth in commercial nuclear and data center work, but investors still need to watch for procurement delays and customer in-sourcing risks.
Long contracts, slow customers
Amentum makes money by winning large, long-term service contracts. Its customers include the Department of Energy, the Department of Defense, the Intelligence Community, NASA, and allied governments. In fiscal 2025, 81 percent of revenue came from contracts with the U.S. federal government, either directly or as a subcontractor.
The company works under cost-plus-fee, fixed-price, and time-and-materials contracts. In plain terms, some contracts reimburse costs and add a fee, some pay a set price, and some pay based on labor hours and materials. Fixed-price work can lift margins when Amentum executes well, but it can hurt if costs run over plan.
Its moat comes from trust, scale, security clearances, and experience on sensitive missions. The Jacobs CMS merger made Amentum larger and broader. Now, the company is looking beyond simple government fees. The new AI data center project with the Department of Energy might allow Amentum to take an economic interest in the facility itself.
The weak spot is the customer base. Federal work is sticky, but budget delays, shutdowns, shifting priorities, and agency choices can slow awards or move work away from contractors.
Where the work sits
Digital Solutions
This segment covers intelligence analytics, cybersecurity, space system development, next-generation IT, C5ISR, threat recognition, and digital engineering.
Global Engineering Solutions
This segment handles environmental cleanup, clean energy, platform engineering, sustainment, supply chain management, NASA support, DOE work, and DOD research and testing.
Nuclear energy services
Amentum supports nuclear projects tied to energy security, cleanup, and new reactor activity, including the new multi-gigawatt Savannah River Site project.
Space and launch support
The company supports space systems, launch infrastructure, systems integration, and space flight operations.
Critical digital infrastructure
This includes smart commercial infrastructure, data centers, digital connectivity, cyber, and network defense.
Outcome-based IT models
Management is exploring contracts where Amentum gets paid for delivered outcomes, such as the DISA Compute-as-a-Service model or facility token monetization.
Two reporting segments
Segment mix uses fiscal Q2 2026 revenue from the Form 10-Q for the quarter ended April 3, 2026. The larger caveat is customer concentration: U.S. federal work was 81 percent of fiscal 2025 revenue.
What could break the thesis
Federal budget shock
High impact · Medium oddsAmentum gets most of its revenue from U.S. federal work. Shutdowns, continuing resolutions, and agency budget fights can delay awards and slow spending. The late 2025 shutdown already caused a $150 million revenue reduction in fiscal Q1 2026.
NASA and agency in-sourcing
Medium impact · High oddsGovernment customers can choose to bring work back inside the agency. Management increased its guidance to a 3 percent fiscal 2027 revenue impact from a NASA workforce in-sourcing initiative, up from 1 percent before.
Debt limits choices
High impact · Medium oddsAmentum took on meaningful debt around the Jacobs CMS merger. Management has repaid debt faster than expected and targets less than 3.0x net leverage by fiscal year-end 2026. Until that target is met, buybacks, acquisitions, and other uses of cash stay more limited.
Fixed-price contract overruns
Medium impact · Medium oddsA higher mix of fixed-price work can help margins when projects run well. The same structure can hurt if labor, supply, or schedule costs rise above plan. This is a normal risk for engineering and services contractors, but it matters more as Amentum pushes for margin expansion.
Protests and award delays
Medium impact · Medium oddsLarge government contracts can be protested by losing bidders. Even when the company wins, protests can delay revenue and staffing.
In one breath
What does Amentum do?
Amentum provides engineering, digital, space, nuclear, cyber, and mission support services. Most of its work is for U.S. federal agencies and allied governments.
Why is Amentum's backlog important?
Backlog is contracted work that has not yet become revenue. Amentum has roughly $48 billion of backlog, which gives the company a long runway if programs stay funded and on schedule.
Is Amentum mostly a defense company?
Defense is important, but the company is broader than defense alone. It also serves DOE, NASA, the Intelligence Community, nuclear programs, environmental cleanup, space, and digital infrastructure.
What should investors watch next?
The main items are the economic structure of the Savannah River Site AI data center project, the less than 3.0x net leverage target, and updates on government in-sourcing risks.
Sources and research notes
This page combines Finn's company research with public filings and other cited materials. The thesis is reviewed when material company information changes; Finn Scores use the latest available scoring data.
- Thesis reviewed
- August 23, 2026
- Score data
- September 6, 2026
- Reviewed by
- Shivam Bharuka
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