AMTM at a glance
Amentum Holdings Inc (AMTM, SEC CIK 2011286) filed its latest 10-K annual report on November 25, 2025, a 10-Q quarterly report on August 11, 2026, an 8-K current report on October 2, 2026 and Form 4 insider filings as recently as September 17, 2026. SignalX summarizes each filing with AI and tracks the company's insider trades and institutional holders.
- For the fiscal year ended October 3, 2025 (FY2025), Amentum Holdings Inc (AMTM) reported revenue of $14.4 billion (up 71.6% from FY2024) and net income of $66.0 million. Diluted EPS was $0.27.
- As of June 30, 2026, 36 institutional investment managers tracked by SignalX reported holding Amentum Holdings Inc (AMTM) shares worth $1.9 billion in 13F-HR filings.
Source: SEC EDGAR (XBRL financial data, 13F-HR and Form 4 filings).
- Revenue · FY2025
- $14.4B
- +71.6% vs prior year
- Insiders · 90 days
- 0 buys · 0 sells
- No open-market trades
- 13F holders
- 36 funds
- $1.9B · +0 vs prior quarter
- Latest 10-Q
- Aug 11, 2026
- Quarterly report
SignalX for AMTM
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- Fund moves. Which tracked funds opened, added or cut AMTM, by share count.
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Recent Insider Transactions (Form 4)
Latest reported trades by officers, directors and 10% owners
| Insider | Type | Date | Shares | Price |
|---|---|---|---|---|
| Thompson Christopher M.T. | G | Aug 14, 2026 | 4,250 | - |
| Heller John E. | M | May 6, 2026 | 18,145 | - |
| Johnson Travis Barton | F | May 6, 2026 | 4,097 | $24.89 |
| Arnette Stephen A | F | May 6, 2026 | 3,314 | $24.89 |
| Arnette Stephen A | M | May 6, 2026 | 13,609 | - |
| Johnson Travis Barton | M | May 6, 2026 | 13,609 | - |
| Arnette Stephen A | M | May 6, 2026 | 13,609 | - |
| Johnson Travis Barton | M | May 6, 2026 | 13,609 | - |
Financial SummaryXBRL
| Metric | FY2023 | FY2024 | FY2025 |
|---|---|---|---|
| Profitability | |||
| Revenue | - | $8.4B | $14.4B |
| Operating Income | - | $291.0M | $480.0M |
| Net Income | -$314.0M | -$82.0M | $66.0M |
| Op. Margin | - | 3.5% | 3.3% |
| Net Margin | - | -1.0% | 0.5% |
| Balance Sheet | |||
| Total Assets | $6.4B | $12.0B | $11.5B |
| Equity | - | $4.5B | $4.5B |
| ROE | - | -1.8% | 1.5% |
| Per Share | |||
| EPS | $-3.49 | $-0.90 | $0.27 |
| Cash Flow | |||
| Operating CF | - | $47.0M | $543.0M |
| CapEx | $12.0M | $11.0M | $27.0M |
Source: XBRL data in Amentum Holdings Inc (AMTM)'s 10-K filings on SEC EDGAR, in USD. Compare across companies →
13F Fund Holdings: Quarterly Trend
Latest: Q2 2026Aggregate AMTM share value held by 13F filers tracked by SignalX, by quarter.
Quarterly totals table
| Quarter | Funds | Total value |
|---|---|---|
| Q2 2026 | 36 | $1.87B |
| Q1 2026 | 36 | $2.11B |
| Q4 2025 | 33 | $2.30B |
| Q3 2025 | 32 | $1.89B |
| Q2 2025 | 33 | $1.93B |
| Q1 2025 | 26 | $1.07B |
| Q4 2024 | 22 | $959.9M |
| Q3 2024 | 23 | $673.5M |
- Invesco Ltd+3.48M (+16%)
- Dimensional Fund Advisors+1.75M (+46%)
- Goldman Sachs Group+1.58M (+140%)
- Millennium Management+1.50M (+237%)
- Citadel Advisors LLC+590.0K (+732%)
- Two Sigma Investments−615.9K (-68%)
- Bank of America Corp−362.1K (-15%)
- BNY Mellon−30.5K (-3%)
- Raymond James Financial−21.4K (-9%)
- Ameriprise Financial−10.3K (-3%)
- Loews Corporation+500.0K
- Blackstone Group+31.0K
- HANCOCK WHITNEY CORP+18.2K
- Marex Group plc−53.0K
- Allstate−19.5K
- M&T Bank−9.6K
Source: 13F-HR filings on SEC EDGAR (aggregated from 241 fund-quarter rows). Reflects only 13F filers tracked by SignalX, not the full institutional ownership universe. How 13F filings work
Latest 2026 SEC Filings: 10-K, 10-Q, 8-K & Form 4
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AMTM SEC filings: frequently asked questions
Which institutions hold AMTM stock?
As of June 30, 2026, the largest Amentum Holdings Inc (AMTM) holders among the 13F filers tracked by SignalX were Invesco Ltd ($515.8 million), BlackRock ($370.1 million), Vanguard Portfolio Management LLC ($164.3 million), Vanguard Capital Management LLC ($138.7 million), FMR LLC (Fidelity) ($117.4 million). 13F-HR reports are filed up to 45 days after each quarter ends.
What was AMTM's revenue in fiscal year 2025?
For the fiscal year ended October 3, 2025 (FY2025), Amentum Holdings Inc (AMTM) reported revenue of $14.4 billion (up 71.6% from FY2024) and net income of $66.0 million. Diluted EPS was $0.27. The figures come from the XBRL data in the 10-K.
What are the latest AMTM SEC filings?
Amentum Holdings Inc (AMTM) filed its latest 10-K annual report on November 25, 2025, a 10-Q quarterly report on August 11, 2026, an 8-K current report on October 2, 2026 and a Form 4 insider filing on September 17, 2026.
What is AMTM's SEC CIK number?
Amentum Holdings Inc (AMTM)'s SEC Central Index Key (CIK) is 2011286. EDGAR lists every AMTM filing under that number.
Ask anything about AMTM
The research agent reads AMTM's filings, financials, insider trades and 13F holders, then answers with sources.