Amentum Holdings, Inc.
In the published model solve dated 2026-Q2, anchored at $20.00, Amentum Holdings, Inc. (AMTM) is priced for -1.3% growth. boothcheck publishes no house fair value, target price, or buy/sell rating; individual model outputs and user-controlled scenarios are analytical inputs, not Boothcheck targets. The narrative was composed July 25, 2026 from SEC EDGAR filings.
• Nearly two-thirds of revenue arrives on cost-plus-fee contracts, where the customer reimburses the cost and pays a fee on top, which is why a services business of this size shows a 3.6% operating margin and why that figure says less about quality than it appears to. • The work is already sold well beyond the next fiscal year: ⟦As of October 3, 2025, the Company had total backlog of $47.1 billion, compared with $45.0 billion as of September 27, 2024⟧, against annual revenue a fraction of that s
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472 institutional managers reported holding AMTM in 13F filings for the quarter ended 2026-03-31. Together they hold about 86% of the company; the top 10 hold 57%. 60 opened new positions that quarter. Held by Invesco, BlackRock, Vanguard Group, among others. On the short side, 13.6M shares were sold short as of the 2026-06-15 count, about 6% of shares outstanding (8 days of typical volume to cover).
Quarterly 13F filings arrive up to 45 days after quarter end, so the picture is never current (filed through 2026-05-29). Nothing here is investment advice.
Open-market insider buys at AMTM over the trailing three years: 2025: 2 buys totaling $2.18M. 18 officers and directors are on file.
Code P open-market purchases from SEC Form 4 filings, non-derivative, excluding scheduled 10b5-1 plans. Nothing here is investment advice.
AMTM's recent reports: the day-one move, then what the following quarter actually did.
| report | day one | next quarter |
|---|---|---|
| 2025-05-08 | -3.3% | +12.5% |
| 2025-08-07 | +5.2% | -7.7% |
| 2025-11-26 | +23.9% | +21.7% |
| 2026-02-11 | -16.9% | -9.2% |
Day-one is the close-to-close move around the filing. Nothing here is investment advice.
AMTM's latest 8-K filings: 2026-08-10 (items 2.02, 9.01); 2026-05-11 (items 2.02, 9.01); 2026-04-28 (items 1.01); 2026-02-10 (items 5.07); 2026-02-09 (items 2.02, 9.01).
Item codes are the SEC's own classification of what each report discloses. Dates link to the filing on EDGAR. Nothing here is investment advice.
Model solve date: 2026-Q2
Narrative composed: July 25, 2026
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For informational and research purposes only. Not investment advice. Not a recommendation to buy, sell, or hold any security. boothcheck is not a registered investment adviser. Past performance does not guarantee future results.