AMTM Amentum (AMTM) Insider Trading, Ownership & Congress Trades
Services · Services-business services, nec · CIK 0002011286
SEC filings
Insider buyers, 180 days
0
House members buying, 1 year
0
STOCK Act, US House only, disclosed up to 45 days after the trade
Funds added, last quarter
214
13F, latest reported quarter
Conversions, 180 days
5
Codes C/M, not in net · no price filed
What the filings say about AMTM
Congress, 1 year
No trades
Last one: sale, 2024-10-31
Amentum insider trades (Form 4)
Form 4 buys and sells (codes P and S). Grants, option exercises
and conversions excluded.
No insider purchases or sales are on record for Amentum Holdings, Inc. in the period covered. Source: SEC Form 4 filings, as of 2026-10-27.
Insider
Filed
Shares
Value
Since filing
Context
- First Form 4 purchase or sale (code P or S) here by this insider on our record.
- The trade is 100.0% of the 4,600 shares held after it.
- 1 other insider bought within 30 days.
- 214 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Director Loughran Barbara bought about $97.7K of AMTM on Feb 18, 2025; 1 other insider bought within 30 days and 214 funds added in the latest 13F quarter.Context
- First Form 4 purchase or sale (code P or S) here by this insider on our record.
- The trade is 16.1% of the 620,893 shares held after it.
- 1 other insider bought within 30 days.
- 214 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Executive Chair DEMETRIOU STEVEN J. bought about $2.1M of AMTM on Feb 12, 2025, the largest insider purchase at the company on our record; 1 other insider bought within 30 days and 214 funds added in the latest 13F quarter.2 transactions on record · a thin record, read with care
Since filing: total return from the first close after the filing to the latest close, dividend-adjusted. Not a forecast.
Context lines are counts over the filings above and returns from our own price history, never a price level. Not investment advice.
Seven facts, ranked against the sector ·
Rank is not a forecast
Insiders
no insider buys or sells on file
Congress
no House purchase disclosed in the last 12 months
Funds
214 funds bought in last quarter
more than 77% of Services
Revenue
+71.6% year over year
more than 92% of Services
Margin
0.5% net margin
below 57% of Services
Buybacks
no share repurchases reported
Short interest
8.1% of the float short (float per yahoo 2026-10-26) · 6.8 days to cover · settled 2026-09-30
more than 68% of Services
What changed in the last 30 days
Nothing new filed in the last 30 days
Watch AMTM
A free account keeps a watchlist and can send one email a day when insiders, funds or Congress file on the names in it. No password and no card.
The year, with the filings on it
Total return over 12 months. Each marker is a filing; hover or tap one for the detail.
-1.2%12M
Indexed to 100, dividend-adjusted, not a price chart.
When a name files heavily, the largest trades are drawn first.
Who owns AMTM: institutional holders (13F)
13F holdings, latest reported quarter
45,026,743 sh
$930.7M
24,954,251 sh
$515.8M
17,906,984 sh
$370.1M
12,285,504 sh
$253.9M
7,948,385 sh
$164.3M
Congress trades in AMTM
STOCK Act disclosures, US House only, filed up to 45 days after the trade
Sold 2024-10-31 · disclosed 6 days later
$1,001 - $15,000
Exchanged 2024-09-30 · disclosed 15 days later
$1,001 - $15,000
Activist and 5% holders (13D/13G)
No 5%+ ownership filings
Nobody has filed for crossing 5%. That is a fact, not missing data.
AMTM planned insider sales (Form 144)
No planned-sale notices
No insider has filed to sell. Watch this after a run-up.
AMTM mutual fund holders (N-PORT)
Funds ranked by the share of their own portfolio in this stock (N-PORT).
Ancora/Thelen Small-Mid Cap Fund
$4.8M position · as of 2026-06-30
2.0%
Invesco S&P Spin-Off ETF
$4.1M position · as of 2026-07-31
1.8%
AMG Frontier Small Cap Growth Fund
$1.5M position · as of 2026-07-31
1.6%
Transamerica Mid Cap Value Opportunities
$11.9M position · as of 2026-07-31
1.5%
Nuveen Small/Mid Cap Value Fund
$1.9M position · as of 2026-06-30
1.4%
Transamerica TSW Mid Cap Value Opportunities VP
$3.2M position · as of 2026-06-30
1.4%
SEC N-PORT, monthly, about 60 days late · funds ≥ $10M ·
% is the share of the fund's own portfolio
Corporate PAC
The company's PAC: committee totals only, never individual donors (FEC).
Amentum Holdings, Inc. Pac (Amentum Pac)
Cycle 2026 · $179K spent
$277.8K
Federal Election Commission, matched by the PAC's connected organisation
Executive pay vs shareholder return
CEO pay, headline and as actually paid, against the company's
return and its chosen peers' (DEF 14A).
FY
CEO total
Actually paid
Other execs, avg
TSR
Peer TSR
2024
$2.8M
$2.8M
$2.8M
n/a
n/a
Tagged by the company under SEC Item 402(v). Returns are
cumulative from the start of the disclosure period. This filer reported no return figures.
Live price
Daily candles from TradingView, under their licence. No filings marked.
Why this name is on the desk
The complete filing record, in one place.
The record shows 214 funds added last quarter. Each figure is a federal filing, dated the day it went public.
AMTM financials
Revenue growth
+71.6%
XBRL, annual
Net margin
0.5%
Ratios from the company's XBRL filings, latest filings
Revenue, TTM
$14.1B
four quarters, 2025-06-28 to 2026-07-03
Revenue, TTM AMTM
| FY Oct 2025 | $14.4B |
| FY Sep 2024 | $8.4B |
| FY Sep 2023 | n/a |
| FY Sep 2022 | n/a |
| Jul 2026 | $3.5B |
| Apr 2026 | $3.5B |
| Jan 2026 | $3.2B |
| Oct 2025 | $3.9B |
| Jun 2025 | $3.6B |
| Mar 2025 | $3.5B |
| Dec 2024 | $3.4B |
| Sep 2024 | $2.2B |
At each fiscal year end
Single quarter
Net margin, TTM
+1.4%
net income over revenue, 2025-06-28 to 2026-07-03
Net margin, TTM AMTM
| FY Oct 2025 | +0.5% |
| FY Sep 2024 | -1.0% |
| FY Sep 2023 | n/a |
| FY Sep 2022 | n/a |
| Jul 2026 | +1.9% |
| Apr 2026 | +1.6% |
| Jan 2026 | +1.4% |
| Oct 2025 | +1.0% |
| Jun 2025 | +0.3% |
| Mar 2025 | +0.1% |
| Dec 2024 | +0.4% |
| Sep 2024 | +1.2% |
At each fiscal year end
Single quarter
Free cash flow, TTM
$474.0M
operating cash flow minus capex, 2025-06-28 to 2026-07-03
Free cash flow, TTM AMTM
| FY Oct 2025 | $516.0M |
| FY Sep 2024 | $36.0M |
| FY Sep 2023 | n/a |
| FY Sep 2022 | n/a |
| Jul 2026 | $135.0M |
| Apr 2026 | $220.0M |
| Jan 2026 | -$142.0M |
| Oct 2025 | $261.0M |
| Jun 2025 | $100.0M |
| Mar 2025 | $53.0M |
| Dec 2024 | $102.0M |
| Sep 2024 | -$117.0M |
At each fiscal year end
Single quarter
Debt to equity
0.81x
long-term 2026-07-03 plus current 2026-07-03; equity 2026-07-03
Debt to equity AMTM
| FY Oct 2025 | 0.88x |
| FY Sep 2024 | 1.05x |
| FY Sep 2023 | 10.97x |
| FY Sep 2022 | n/a |
| Jul 2026 | 0.81x |
| Apr 2026 | 0.85x |
| Jan 2026 | 0.86x |
| Oct 2025 | 0.88x |
| Jun 2025 | 1.01x |
| Mar 2025 | 1.06x |
| Dec 2024 | 1.05x |
| Sep 2024 | 1.05x |
At each fiscal year end
Trailing four quarters at each quarter end
Cash flow to debt
0.13x
TTM operating cash flow over long-term 2026-07-03 plus current 2026-07-03
Cash flow to debt AMTM
| FY Oct 2025 | 0.14x |
| FY Sep 2024 | 0.01x |
| FY Sep 2023 | n/a |
| FY Sep 2022 | n/a |
| Jul 2026 | 0.13x |
| Apr 2026 | 0.12x |
| Jan 2026 | 0.08x |
| Oct 2025 | 0.14x |
| Jun 2025 | 0.04x |
| Mar 2025 | 0.06x |
| Dec 2024 | 0.05x |
| Sep 2024 | 0.01x |
At each fiscal year end
Trailing four quarters at each quarter end
Return on equity
+4.5%
TTM net income over average of 2025-06-27 and 2026-07-03
Return on equity AMTM
| FY Oct 2025 | +1.5% |
| FY Sep 2024 | -3.4% |
| FY Sep 2023 | n/a |
| FY Sep 2022 | n/a |
| Jul 2026 | +4.5% |
| Apr 2026 | +3.3% |
| Jan 2026 | +2.2% |
| Oct 2025 | +1.5% |
| Jun 2025 | +2.2% |
| Mar 2025 | +0.7% |
| Dec 2024 | -1.2% |
| Sep 2024 | -3.4% |
At each fiscal year end
Trailing four quarters at each quarter end
Return on assets
+1.8%
TTM net income over average of 2025-06-27 and 2026-07-03
Return on assets AMTM
| FY Oct 2025 | +0.6% |
| FY Sep 2024 | -0.9% |
| FY Sep 2023 | n/a |
| FY Sep 2022 | n/a |
| Jul 2026 | +1.8% |
| Apr 2026 | +1.3% |
| Jan 2026 | +0.8% |
| Oct 2025 | +0.6% |
| Jun 2025 | +0.4% |
| Mar 2025 | +0.1% |
| Dec 2024 | -0.2% |
| Sep 2024 | -0.9% |
At each fiscal year end
Trailing four quarters at each quarter end
Return on invested capital
+5.7%
operating income after a 25.6% effective tax rate, over long-term 2026-07-03 plus current 2026-07-03 plus average of 2025-06-27 and 2026-07-03 minus cash
Return on invested capital AMTM
| FY Oct 2025 | +3.1% |
| FY Sep 2024 | n/a |
| FY Sep 2023 | n/a |
| FY Sep 2022 | n/a |
| Jul 2026 | +5.7% |
| Apr 2026 | +4.7% |
| Jan 2026 | +3.7% |
| Oct 2025 | +3.1% |
| Jun 2025 | n/a |
| Mar 2025 | n/a |
| Dec 2024 | n/a |
| Sep 2024 | n/a |
At each fiscal year end
Trailing four quarters at each quarter end
Return on capital employed
+6.4%
operating income (EBIT proxy) over average of 2025-06-27 and 2026-07-03 minus current liabilities
Return on capital employed AMTM
| FY Oct 2025 | +5.0% |
| FY Sep 2024 | +3.9% |
| FY Sep 2023 | n/a |
| FY Sep 2022 | n/a |
| Jul 2026 | +6.4% |
| Apr 2026 | +5.6% |
| Jan 2026 | +5.1% |
| Oct 2025 | +5.0% |
| Jun 2025 | +3.9% |
| Mar 2025 | +3.6% |
| Dec 2024 | +3.4% |
| Sep 2024 | +3.9% |
At each fiscal year end
Trailing four quarters at each quarter end
P/E, trailing
26.59x
close 2026-10-26 over four quarters of diluted EPS, 2025-06-28 to 2026-07-03
P/E, trailing AMTM
| FY Oct 2025 | 96.11x |
| FY Sep 2024 | n/a |
| FY Sep 2023 | n/a |
| FY Sep 2022 | n/a |
| Jul 2026 | 25.59x |
| Apr 2026 | 45.07x |
| Jan 2026 | 76.20x |
| Oct 2025 | 96.11x |
| Jun 2025 | 57.20x |
| Mar 2025 | 225.87x |
| Dec 2024 | n/a |
| Sep 2024 | n/a |
At each fiscal year end
Trailing four quarters at each quarter end
Enterprise value
$8.8B
market value at close 2026-10-26 on 2026-08-07 shares, plus long-term 2026-07-03 plus current 2026-07-03, minus cash 2026-07-03
Enterprise value AMTM
| FY Oct 2025 | $9.8B |
| FY Sep 2024 | n/a |
| FY Sep 2023 | n/a |
| FY Sep 2022 | n/a |
| Jul 2026 | $8.6B |
| Apr 2026 | $10.1B |
| Jan 2026 | $11.1B |
| Oct 2025 | $9.8B |
| Jun 2025 | $9.5B |
| Mar 2025 | $8.5B |
| Dec 2024 | $9.1B |
| Sep 2024 | n/a |
At each fiscal year end
Trailing four quarters at each quarter end
FCF yield
+8.8%
TTM free cash flow over market value at close 2026-10-26
FCF yield AMTM
| FY Oct 2025 | +8.2% |
| FY Sep 2024 | n/a |
| FY Sep 2023 | n/a |
| FY Sep 2022 | n/a |
| Jul 2026 | +9.1% |
| Apr 2026 | +6.7% |
| Jan 2026 | +3.7% |
| Oct 2025 | +8.2% |
| Jun 2025 | +2.4% |
| Mar 2025 | +6.2% |
| Dec 2024 | +4.5% |
| Sep 2024 | n/a |
At each fiscal year end
Trailing four quarters at each quarter end
PEG, trailing
0.26x
P/E over trailing EPS growth of 102%: four quarters to 2026-07-03 against the four to 2025-06-27
PEG, trailing AMTM
| FY Oct 2025 | n/a |
| FY Sep 2024 | n/a |
| FY Sep 2023 | n/a |
| FY Sep 2022 | n/a |
| Jul 2026 | 0.25x |
| Apr 2026 | 0.07x |
| Jan 2026 | n/a |
| Oct 2025 | n/a |
| Jun 2025 | n/a |
| Mar 2025 | n/a |
| Dec 2024 | n/a |
| Sep 2024 | n/a |
At each fiscal year end
Trailing four quarters at each quarter end
Price as of 2026-10-26. Hover or tap a tile for its yearly and quarterly history.
Method
TTM is four consecutive fiscal quarters; Q4 is the year minus nine months when not filed. Returns use the average of opening and closing balances. EBIT is approximated by operating income. PEG uses trailing EPS growth.
Fundamentals
Annual figures from XBRL filings. Pick a past date to see them as known then.
| 2025-10 | 2024-09 | 2023-09 | 2022-09 | |
|---|---|---|---|---|
| Revenue | $14.4B | $8.4B | $7.9B | $7.7B |
| Operating income | $480.0M | $291.0M | $57.0M | $121.0M |
| Net income | $66.0M | -$82.0M | -$314.0M | -$84.0M |
| EPS (diluted) | 0.27 | -0.90 | -3.49 | -0.93 |
| Operating cash flow | $543.0M | $47.0M | $67.0M | $126.0M |
| Cash | $437.0M | $452.0M | $305.0M | n/a |
| Long-term debt | $3.9B | $4.6B | $4.1B | n/a |
SEC XBRL, fiscal years, as known on 2026-10-27
AMTM Stock Sonar score 5/7 axes
Find similar shapesCompareAMTM ranks highest on growth (67th percentile) and institutional and government (58th), and lowest on financial health (36th), among Services peers.
5 of 7 axes scored. Each is a percentile against sector peers (all companies when the sector is thin); higher is better. An unscored axis is unmeasured, not low. How it is scored
AMTM filings, in plain words
Have members of Congress traded AMTM?
Yes, but not in the year to 2026-10-27; the latest on record is a sale by William R. Keating dated 2024-10-31.
Read the full summary
Members of Congress have disclosed trades in AMTM, none in the last year; the latest on record is a sale by William R. Keating dated 2024-10-31. Each figure is counted from SEC and House filings as of 2026-10-27, dated the day the filing was made public.
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