Amentum Holdings, Inc. (AMTM)

Corporate structure

170 entities across 39 jurisdictions, 1 in offshore financial centres. Read directly from the company’s own 10-K EX-21 filed 2025-11-25 — see the exhibit.

Financial health

Two standard screens, computed from the XBRL in FY2025 against FY2024. Every test shows the numbers behind it — a score with its inputs hidden is a number you cannot check.

Six-year record

Ownership flow

14 institutions tracked — 10 added, 3 reduced, 1 opened a new position. Index money added 40,577 shares while active managers cut 170,944.

NORGES BANK holds a position with no prior filing to compare against, so its change is unknown rather than zero — and it is left out of the totals above.

From 13F filings, which cover institutions managing over $100m and are filed up to 45 days after the quarter ends — so this is a considered position, not a live one, and it is not the whole shareholder register.

Other services-business services, nec companies

Amentum Holdings, Inc. files under SIC 7389 — all 43 services-business services, nec companies compared on assets and F-score.

Questions about Amentum Holdings, Inc.

How many subsidiaries does Amentum Holdings, Inc. file with the SEC?

170, listed in its most recent exhibit 21. They are incorporated across 39 jurisdictions, led by Delaware, Massachusetts, Tennessee. 1 of them sit in offshore financial centres. That exhibit is filed with the company's annual report and is the company's own list, not an estimate.

Is Amentum Holdings, Inc. financially healthy?

Amentum Holdings, Inc. scores 6 out of 8 on the Piotroski F-score. Only 8 of the nine tests could be computed from what it filed; the rest need a prior year it has not reported. Every test and the numbers behind it are shown above, so the arithmetic is checkable rather than something you have to take on trust.

Who are the largest institutional holders of Amentum Holdings, Inc.?

Among the managers tracked here, the biggest positions as of the 2026-Q2 13F filings are BlackRock, Inc. (adding), FMR LLC (adding), STATE STREET CORP (adding). Direction is the change in share count against that manager's own previous filing; managers with no prior filing are left out rather than counted as new buyers.