Amentum's $48.2 billion backlog is roughly 14 times the $3.5 billion of revenue it recorded in the nine months ended July 3. That is the scale comparison. Revenue slipped 2% from the comparable nine-month period, with Global Engineering Solutions down 5% while Digital Solutions rose 2.5%.
Shares closed at $22.39 on Aug. 11, down 8.8% for the day. The operating numbers underneath that move point in two directions: operating income rose 67% to $172 million, lifting operating margin to 4.9% from 2.9%, while operating cash flow fell to $235 million from $273 million.
The profit improvement came without a sales increase. Amentum says lower debt and more favorable borrowing rates reduced interest expense, and the merger with Jacobs' businesses brought synergies into selling, general, and administrative costs. Those are meaningful changes to the cost base, but they do not answer why the top line contracted.
Management's explanation for the financing contribution is unusually direct:
"Interest expense and other, net, The decrease in interest expense and other, net was primarily due to the reduction to our term facility principal balance as compared to the nine months ended June 27, 2025 and more favorable rates due to the Amendment."
10-Q 2026-08-11
In plain English, Amentum kept more of each dollar because it paid down debt and got better rates. Net income consequently rose to $66 million from $10 million. The balance-sheet benefit did not translate into more operating cash.
The company describes that cash squeeze this way:
"Net cash provided by operating activities decreased by $38 million for the nine months ended July 3, 2026 when compared to the nine months ended June 27, 2025 as a result of a $129 million increase in cash earnings offset by $167 million in changes in operating assets and liabilities."
10-Q 2026-08-11
That leaves a very specific tension. Accounting earnings improved, but changes in operating assets and liabilities absorbed more than the increase in cash earnings. Amentum's cash balance fell to $459 million from $738 million, while capital spending increased 22% to $22 million. The company does not disclose a more granular reason for the working-capital movement in the supplied filing details.
Backlog offers the counterweight. Amentum reported $48.2 billion as of July 3, up from $44.6 billion a year earlier, primarily from new contract wins, partly offset by revenue recognized on current contracts.
"As of July 3, 2026, the Company had total backlog of $48.2 billion, compared with $44.6 billion as of June 27, 2025, an increase of $3.6 billion primarily due to new contract wins partially offset by revenue recognized on current contracts."
10-Q 2026-08-11
Backlog is expanding even as reported revenue edges lower. The next reported period will put the operating-cash question on a simple scoreboard: whether cash flow can move above the $235 million recorded for these nine months while the backlog remains at the center of the growth case.
Source: Amentum's 10-Q reported $235 million of operating cash flow for the nine months ended July 3, 2026.