Amentum Holdings Inc. monthly returns
Amentum Holdings Inc. has averaged 0.42% per month, positive in 41% of months. Month-by-month returns for Amentum Holdings Inc. (AMTM) below, through October 20, 2026 — the table lists the most recent months; the bar chart plots the last 5 years.
Amentum Holdings Inc. monthly returns#
| Month | Path | Total return |
|---|---|---|
| Oct 2026 | +9.7% | |
| Sep 2026 | -9.4% | |
| Aug 2026 | -10.0% | |
| Jul 2026 | +7.4% | |
| Jun 2026 | -11.0% | |
| May 2026 | -11.4% | |
| Apr 2026 | +0.6% | |
| Mar 2026 | -12.7% | |
| Feb 2026 | -16.5% | |
| Jan 2026 | +23.4% | |
| Dec 2025 | +1.3% | |
| Nov 2025 | +27.8% | |
| Oct 2025 | -6.4% | |
| Sep 2025 | -4.0% | |
| Aug 2025 | -0.1% | |
| Jul 2025 | +5.8% | |
| Jun 2025 | +14.3% | |
| May 2025 | -5.3% | |
| Apr 2025 | +19.9% | |
| Mar 2025 | -7.3% | |
| Feb 2025 | -6.3% | |
| Jan 2025 | -0.3% | |
| Dec 2024 | -13.6% | |
| Nov 2024 | -18.1% | |
| Oct 2024 | -7.8% |
Monthly total return (since Jan 2025)#
Amentum Holdings Inc. returns by calendar month#
Every month of every year since 2025, one tick per year on a shared scale; the dark bar is the month's average. Total returns, dividends reinvested.
October 2026 so far: +9.66% — 1st of 2 Octobers since 2025 at the last close; the average October returned -6.4%.
| Month | −30%0+30% | Average | Median | Up | Best | Worst |
|---|---|---|---|---|---|---|
| Jan | +11.5% | +11.5% | 50% | +23.4% 2026 | -0.3% 2025 | |
| Feb | -11.4% | -11.4% | 0% | -6.3% 2025 | -16.5% 2026 | |
| Mar | -10.0% | -10.0% | 0% | -7.3% 2025 | -12.7% 2026 | |
| Apr | +10.2% | +10.2% | 100% | +19.9% 2025 | +0.6% 2026 | |
| May | -8.4% | -8.4% | 0% | -5.3% 2025 | -11.4% 2026 | |
| Jun | +1.6% | +1.6% | 50% | +14.3% 2025 | -11.0% 2026 | |
| Jul | +6.6% | +6.6% | 100% | +7.4% 2026 | +5.8% 2025 | |
| Aug | -5.0% | -5.0% | 0% | -0.1% 2025 | -10.0% 2026 | |
| Sep | -6.7% | -6.7% | 0% | -4.0% 2025 | -9.4% 2026 | |
| Oct | -6.4% | -6.4% | 0% | -6.4% 2025 | -6.4% 2025 | |
| Nov | +27.8% | +27.8% | 100% | +27.8% 2025 | +27.8% 2025 | |
| Dec | +1.3% | +1.3% | 100% | +1.3% 2025 | +1.3% 2025 |
Methodology#
Monthly returns are total returns (dividends reinvested), computed from AMTM's split- and dividend-adjusted month-end closes. The table shows the most recent 120 months and the bar chart the most recent 60. See the year-by-year returns for the annual view. Past performance does not predict future returns; not investment advice.
FAQ#
- What is Amentum Holdings Inc.'s average monthly return?
- Amentum Holdings Inc. (AMTM) has averaged about 0.42% per month, positive in roughly 41% of months. The best month was Nov 2025 (+27.8%) and the worst was Feb 2026 (-16.5%).