Amentum's third-quarter results and the updated outlook signal a clear inflection point. The company is no longer just a national security contractor deleveraging; it is repositioning as a lead architect of the U.S. nuclear buildout and a scaling partner for hyperscaler data centers. CEO John Heller‘s description of the Savannah River AI data center project captures the ambition:
Amentum was selected by the Department of Energy to lead development of an AI data center and energy infrastructure project at the Savannah River Site. Under this initiative, Amentum will lead a broad consortium to develop, design, build and operate a multi-gigawatt nuclear facility in AI data centers.
This is not a mere contract win; it is a strategic template. The company’s nuclear energy pipeline includes the Westinghouse APX partnership and continued Rolls-Royce SMR deployments, positioning Amentum as a global delivery partner. The AI data center angle ties directly into the accelerating demand for power that is reshaping the energy landscape. “We are really excited about the continued accelerating progress in the critical digital infrastructure space. The team continues to focus on that. ... we're kind of moving to scale with a client.” — Stephen Arnette, Chief Operating Officer · 2026-08-11 COO Steve Arnette’s comment reflects the concrete momentum in critical digital infrastructure—a segment that is growing revenue at 3% this quarter and, more importantly, is now the focal point of resource allocation.
NASA: A Known Headwind, Now Quantified
The most notable revision versus the prior call is the NASA workforce directive. In May, the company estimated a 1% revenue impact for FY27. That expectation has now tripled. CFO Travis Johnson explained the revised view in prepared remarks: “we now anticipate a 3% impact to revenue in fiscal year '27. This is higher than the potential impact we shared on our second quarter call as the scope of in-sourcing is now assumed to be at the upper bound of prior possible scenarios.” — Travis Johnson, Chief Financial Officer · 2026-08-11
This is not a complete surprise—the prior call flagged the risk. But the magnitude escalation is meaningful. “we estimate an approximately 1% impact to revenue in '27, the impact to EBITDA would be a little bit smaller than that” — Stephen Arnette, President, Engineering, Science & Technology · 2026-05-12—that was Steve Arnette in May. The company now says the margin profile of the NASA work is dilutive, so the EBITDA impact will be less than the revenue impact, and the mix shift will be accretive. This is exactly the kind of portfolio shaping management has been telegraphing: exit low-margin work, redeploy into workforce directive-adjacent technologies and higher-margin commercial energy deals.
Capital Deployment: Deleveraging Done, On to Growth
The balance sheet has been transformed. Free cash flow of $135 million in the quarter and $213 million year-to-date allowed Amentum to reach net leverage of 3x—one quarter ahead of schedule. Travis Johnson now says the company is preparing to deploy capital beyond debt reduction: “we're pleased with the progress we've been able to make to date as it relates to our deleveraging objectives. The cash flow performance in the quarter allowed us to get to net leverage of 3x at the end of the quarter, which, as you know, is 1 quarter earlier than we expected when we set that goal back at Capital Markets Day.” — Travis Johnson, Chief Financial Officer · 2026-08-11
This is a direct contrast to the prior quarter’s posture. In May, Johnson said: “we're looking forward to getting to that place, where we achieve our net leverage target of less than 3x by the end of this year.” — Travis Johnson, Chief Financial Officer · 2026-05-12 Now that the target is essentially achieved, M&A, share repurchases, and organic investment are all on the table—with a bias toward the energized growth markets.
The financials confirm that this is a profit transformation. Revenue grew just 1% normalized, but adjusted EBITDA rose 6%, and adjusted EPS jumped 20%. Operating income has climbed 37% year-over-year, even as revenue was flat. The margin story is real: operating margin expanded 120 basis points year-over-year to 4.3%, and free cash flow margin hit 6.1%. The company expects at least another 20 basis points of EBITDA margin expansion in FY27, despite the NASA drag, because the exiting work is low-margin and the new work in nuclear and digital is accretive.
The stock is down 42% from its February peak, and the market has been skeptical of the near-term growth outlook. But the underlying momentum argues for a re-rating if the revenue trajectory inflects. With funded backlog up 10%, pending awards of $32 billion (two-thirds new business), and a book-to-bill of 1.1x in the quarter, the conversion pipeline is robust. The question is not whether Amentum has the right portfolio—it’s whether the protest- and procurement-delay environment will finally clear in FY27. As CEO John Heller stated: “If you look at LTM book-to-bill 1.3 this past quarter, 1.1 book-to-bill. We said we're going to bid over $35 billion this year. We've already done that, which means even with several months to go in the year, we've already exceeded what we did last year.” — John Heller, Chief Executive Officer · 2026-08-11
This is a company that has fixed its balance sheet and is now leaning into the highest-quality growth themes in the sector. The NASA headwind is real, but the offsetting mix shift and the scale of new opportunities suggest the market may be underappreciating the FY27 potential. The pivot is underway.