Amentum Holdings (AMTM) concentration risks

The company's concentration profile is defined by a single, dominant customer exposure of high disclosed size. The U.S. federal government represented 81% of revenues for the year ended October 3, 2025 — a high-share dependency where the vast majority of the revenue base flows through a single government counterparty whose appropriations decisions, contracting priorities, and administrative policy choices directly govern the company's top line. The character is mixed: it is structural in the sense that the company is purpose-built to serve the federal government and competing for that business is the core of the strategy, but it is also a dependency because funding levels, contract renewals, and task-order awards can shift with budget cycles, continuing resolutions, or changes in administration priorities. The scale of the federal share — 81% — means there is effectively no material revenue stream outside this counterparty to absorb a sustained reduction in government spending or a loss of a major contract vehicle. Sequestration risk, continuing resolutions that delay new task-order spending, or a shift in agency priorities away from the company's service areas could all flow through to the top line with little offsetting diversification from non-government revenue. No supplier, product, or secondary geographic concentrations are separately disclosed. On balance, this is the dominant risk in the profile: a high-share government dependency where the investment case is highly sensitive to federal budget dynamics, continuing-resolution timing, and the competitive landscape for agency services contracts.

For the engine’s reasoning on AMTM’s current verdict — including which dimensions drove the score — see the per-dimension breakdown.

Concentration counts reflect items disclosed in each peer’s most recent 10-K; disclosed-size classification uses TrendMatrix’s internal 10-K extraction taxonomy.