# Amentum Holdings, Inc.: overview

AMTM · NYSE · CIK 2011286 · [Industrials](/sectors/industrials.md) · fiscal year ends Oct 2

Pages: [Overview](/companies/amtm.md) · [Financials](/companies/amtm/financials.md) · [Filings](/companies/amtm/filings.md) · [Insiders](/companies/amtm/insiders.md)

Latest reported revenue: [$3.49bn](/filings/0001628280-26-055727.md) for Q3 FY2026, three months to 2026-07-03, from the 10-Q filed Aug 11, 2026 (XBRL us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax, accession 0001628280-26-055727).

## Last eight quarters

| Line item | Unit | Q4 FY2024 (2024-09-27) | Q1 FY2025 (2024-12-27) | Q2 FY2025 (2025-03-28) | Q3 FY2025 (2025-06-27) | Q4 FY2025 (2025-10-03) | Q1 FY2026 (2026-01-02) | Q2 FY2026 (2026-04-03) | Q3 FY2026 (2026-07-03) |
| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: |
| Revenue | $m | [2,212 d](/filings/0001628280-25-053993.md) | [3,416](/filings/0001628280-26-006676.md) | [3,491](/filings/0001628280-26-034156.md) | [3,561](/filings/0001628280-26-055727.md) | [3,925 d](/filings/0001628280-25-053993.md) | [3,237](/filings/0001628280-26-006676.md) | [3,478](/filings/0001628280-26-034156.md) | [3,490](/filings/0001628280-26-055727.md) |
| Gross margin | % | not reported | not reported | not reported | not reported | not reported | not reported | not reported | not reported |
| Operating margin | % | [1.2% d](/filings/0001628280-25-053993.md) | [3.9%](/filings/0001628280-26-006676.md) | [3.2%](/filings/0001628280-26-034156.md) | [2.9%](/filings/0001628280-26-055727.md) | [3.4% d](/filings/0001628280-25-053993.md) | [4.3%](/filings/0001628280-26-006676.md) | [4.3%](/filings/0001628280-26-034156.md) | [4.9%](/filings/0001628280-26-055727.md) |
| Net margin | % | [1.2% d](/filings/0001628280-25-053993.md) | [0.4%](/filings/0001628280-26-006676.md) | [0.1%](/filings/0001628280-26-034156.md) | [0.3%](/filings/0001628280-26-055727.md) | [1.0% d](/filings/0001628280-25-053993.md) | [1.4%](/filings/0001628280-26-006676.md) | [1.6%](/filings/0001628280-26-034156.md) | [1.9%](/filings/0001628280-26-055727.md) |
| Diluted EPS | $ per share | not reported | [0.05](/filings/0001628280-26-006676.md) | [0.02](/filings/0001628280-26-034156.md) | [0.04](/filings/0001628280-26-055727.md) | not reported | [0.18](/filings/0001628280-26-006676.md) | [0.22](/filings/0001628280-26-034156.md) | [0.27](/filings/0001628280-26-055727.md) |
| Free cash flow | $m | [(117) d](/filings/0001628280-25-053993.md) | [102](/filings/0001628280-26-006676.md) | [53.0 d](/filings/0001628280-26-034156.md) | [100 d](/filings/0001628280-26-055727.md) | [261 d](/filings/0001628280-25-053993.md) | [(142)](/filings/0001628280-26-006676.md) | [220 d](/filings/0001628280-26-034156.md) | [135 d](/filings/0001628280-26-055727.md) |

- Revenue. XBRL Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. Derived values: 12-month figure less the 9-month figure.
- Gross margin (gross profit / revenue). XBRL Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. Derived values: 12-month figure less the 9-month figure.
- Operating margin (operating income / revenue). XBRL Operating income: us-gaap:OperatingIncomeLoss; Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. Derived values: 12-month figure less the 9-month figure.
- Net margin (net income / revenue). XBRL Net income: us-gaap:NetIncomeLoss; Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. Derived values: 12-month figure less the 9-month figure.
- Diluted EPS. XBRL Diluted EPS: us-gaap:EarningsPerShareDiluted.
- Free cash flow (operating cash flow − capital expenditure). XBRL Operating cash flow: us-gaap:NetCashProvidedByUsedInOperatingActivities; Capital expenditure: us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. Derived values: 12-month figure less the 9-month figure; 6-month figure less the 3-month figure; 9-month figure less the 6-month figure.

## Last five fiscal years

| Line item | Unit | FY (2022-09-30) | FY (2023-09-29) | FY2024 (2024-09-27) | FY2025 (2025-10-03) |
| --- | --- | ---: | ---: | ---: | ---: |
| Revenue | $bn | [7.7](/filings/0002011286-24-000072.md) | [7.9](/filings/0001628280-25-053993.md) | [8.4](/filings/0001628280-25-053993.md) | [14.4](/filings/0001628280-25-053993.md) |
| Gross margin | % | not reported | not reported | not reported | not reported |
| Operating margin | % | [1.6%](/filings/0002011286-24-000072.md) | [0.7%](/filings/0001628280-25-053993.md) | [3.5%](/filings/0001628280-25-053993.md) | [3.3%](/filings/0001628280-25-053993.md) |
| Net margin | % | [(1.1%)](/filings/0002011286-24-000072.md) | [(4.0%)](/filings/0001628280-25-053993.md) | [(1.0%)](/filings/0001628280-25-053993.md) | [0.5%](/filings/0001628280-25-053993.md) |
| Diluted EPS | $ per share | [(0.93)](/filings/0002011286-24-000072.md) | [(3.49)](/filings/0001628280-25-053993.md) | [(0.90)](/filings/0001628280-25-053993.md) | [0.27](/filings/0001628280-25-053993.md) |
| Free cash flow | $bn | [0.1](/filings/0002011286-24-000072.md) | [0.1](/filings/0001628280-25-053993.md) | [0.0](/filings/0001628280-25-053993.md) | [0.5](/filings/0001628280-25-053993.md) |

- Revenue. XBRL Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax.
- Gross margin (gross profit / revenue). XBRL Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax.
- Operating margin (operating income / revenue). XBRL Operating income: us-gaap:OperatingIncomeLoss; Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax.
- Net margin (net income / revenue). XBRL Net income: us-gaap:NetIncomeLoss; Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax.
- Diluted EPS. XBRL Diluted EPS: us-gaap:EarningsPerShareDiluted.
- Free cash flow (operating cash flow − capital expenditure). XBRL Operating cash flow: us-gaap:NetCashProvidedByUsedInOperatingActivities; Capital expenditure: us-gaap:PaymentsToAcquirePropertyPlantAndEquipment.

Each value links to the filing it came from. d marks a derived value. A ratio is not reported when any input is missing.

## Insider purchases and sales

The last 20 open-market transactions on Form 4 (codes P and S). Reported price is as stated on the form, not a market price. [All insider transactions](/companies/amtm/insiders.md)

None in coverage.

## Funds that report holding it

From each manager’s latest Form 13F, largest reported value first. Reported value is as filed: filing data, not a price. [All funds](/funds.md)

| Fund | Quarter ended | Reported value | Shares | Put or call | Change on the quarter before |
| --- | --- | ---: | ---: | --- | --- |
| [AMERICAN SECURITIES LLC](/funds/1475483.md) | 2026-06-30 | $930.7m | 45,026,743 |  | Unchanged |
| [Invesco Ltd.](/funds/914208.md) | 2026-06-30 | $515.8m | 24,954,251 |  | Added +3,480,473 |
| [BlackRock, Inc.](/funds/2012383.md) | 2026-06-30 | $370.1m | 17,906,984 |  | Added +65,701 |
| [PRIMECAP MANAGEMENT CO/CA/](/funds/763212.md) | 2026-06-30 | $253.9m | 12,285,504 |  | Added +200,210 |
| [VANGUARD PORTFOLIO MANAGEMENT LLC](/funds/2100121.md) | 2026-06-30 | $164.3m | 7,948,385 |  | Added +95,434 |
| [VANGUARD CAPITAL MANAGEMENT LLC](/funds/2100119.md) | 2026-06-30 | $138.7m | 6,711,987 |  | Added +61,108 |
| [FMR LLC](/funds/315066.md) | 2026-06-30 | $117.4m | 5,679,175 |  | Added +100,789 |
| [DIMENSIONAL FUND ADVISORS LP](/funds/354204.md) | 2026-06-30 | $114.5m | 5,537,696 |  | Added +1,750,276 |
| [STATE STREET CORP](/funds/93751.md) | 2026-06-30 | $106.5m | 5,151,772 |  | Added +72,731 |
| [FRONTIER CAPITAL MANAGEMENT CO LLC](/funds/351173.md) | 2026-06-30 | $85.7m | 4,143,971 |  | Reduced −786,239 |

## Recent filings

[All 182 filings](/companies/amtm/filings.md)

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-10-02 | 20:19 ET | [8-K](/filings/0002011286-26-000026.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0002011286-26-000026 |
| 2026-08-11 | 20:25 ET | [10-Q](/filings/0001628280-26-055727.md) | Quarterly report, period 2026-07-03 | 0001628280-26-055727 |
| 2026-08-10 | 20:42 ET | [8-K](/filings/0001628280-26-055294.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-26-055294 |
| 2026-05-12 | 20:37 ET | [10-Q](/filings/0001628280-26-034156.md) | Quarterly report, period 2026-04-03 | 0001628280-26-034156 |
| 2026-05-11 | 21:05 ET | [8-K](/filings/0001628280-26-033648.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-26-033648 |
| 2026-04-28 | 12:01 ET | [8-K](/filings/0002011286-26-000011.md) | 1.01 Entry into a material agreement | 0002011286-26-000011 |
| 2026-02-10 | 14:41 ET | [8-K](/filings/0001628280-26-006679.md) | 5.07 Shareholder vote results | 0001628280-26-006679 |
| 2026-02-10 | 14:20 ET | [10-Q](/filings/0001628280-26-006676.md) | Quarterly report, period 2026-01-02 | 0001628280-26-006676 |
| 2026-02-09 | 21:37 ET | [8-K](/filings/0001628280-26-006491.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-26-006491 |
| 2025-12-19 | 21:05 ET | [DEF 14A](/filings/0001104659-25-123111.md) | Proxy statement, period 2026-02-06 | 0001104659-25-123111 |

## Latest annual report

[Form 10-K for the fiscal year ended Oct 3, 2025](/filings/0001628280-25-053993.md), filed Nov 25, 2025.

## Forecast league

Not in this season’s league. [This season’s league](/leagues.md)

## About the filer

- CIK: 2011286
- Tickers: AMTM
- Exchange: NYSE
- SIC code: 7389 Services-Business Services, NEC
- State of incorporation: DE
- Filer category: Large accelerated filer

Source: SEC EDGAR, XBRL company facts, the filing index and Forms 4. Last ingested by Listed: Oct 24, 2026, 15:50 ET. No prices; not investment advice.