Amentum Holdings (AMTM) seasonality heatmap
Returns across monthly, quarterly, and yearly periods. Cell color encodes signed magnitude; the scale auto-fits each table.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +23.4% | -16.5% | -12.7% | +0.6% | -11.4% | -11.0% | +7.6% | — | — | — | — | — |
| 2025 | -0.3% | -6.3% | -7.3% | +19.9% | -5.3% | +14.3% | +5.8% | -0.1% | -4.0% | -6.4% | +27.8% | +1.3% |
| 2024 | — | — | — | — | — | — | — | — | — | -7.8% | -18.1% | -13.6% |
| Avg | +11.5% | -11.4% | -10.0% | +10.2% | -8.4% | +1.6% | +5.8% | -0.1% | -4.0% | -7.1% | +4.8% | -6.2% |
| Median | +11.5% | -11.4% | -10.0% | +10.2% | -8.4% | +1.6% | +5.8% | -0.1% | -4.0% | -7.1% | +4.8% | -6.2% |
| Last 5Y Avg | — | — | — | — | — | — | — | — | — | — | — | — |
| Std Dev (σ) | 16.7% | 7.2% | 3.8% | 13.7% | 4.3% | 17.9% | — | — | — | 1.0% | 32.4% | 10.6% |
| Consistency (μ/σ) | 0.69 | -1.59 | -2.64 | 0.75 | -1.94 | 0.09 | — | — | — | -7.43 | 0.15 | -0.58 |
| Win Rate (%) | 50% | 0% | 0% | 100% | 0% | 50% | 100% | 0% | 0% | 0% | 50% | 50% |
| Winning / Losing Months | ▲1▼1 | ▲0▼2 | ▲0▼2 | ▲2▼0 | ▲0▼2 | ▲1▼1 | ▲1▼0 | ▲0▼1 | ▲0▼1 | ▲0▼2 | ▲1▼1 | ▲1▼1 |
| Longest Win / Loss Streak | ▲1▼1 | ▲0▼2 | ▲0▼2 | ▲2▼0 | ▲0▼2 | ▲1▼1 | ▲1▼0 | ▲0▼1 | ▲0▼1 | ▲0▼2 | ▲1▼1 | ▲1▼1 |
| Best | +23.4%in January 2026 | -6.3%in February 2025 | -7.3%in March 2025 | +19.9%in April 2025 | -5.3%in May 2025 | +14.3%in June 2025 | +5.8%in July 2025 | -0.1%in August 2025 | -4.0%in September 2025 | -6.4%in October 2025 | +27.8%in November 2025 | +1.3%in December 2025 |
| Worst | -0.3%in January 2025 | -16.5%in February 2026 | -12.7%in March 2026 | +0.6%in April 2026 | -11.4%in May 2026 | -11.0%in June 2026 | +5.8%in July 2025 | -0.1%in August 2025 | -4.0%in September 2025 | -7.8%in October 2024 | -18.1%in November 2024 | -13.6%in December 2024 |
−18.1%+27.8%
2026
Jan+23.4%
Feb-16.5%
Mar-12.7%
Apr+0.6%
May-11.4%
Jun-11.0%
Jul+7.6%
Aug—
Sep—
Oct—
Nov—
Dec—
2025
Jan-0.3%
Feb-6.3%
Mar-7.3%
Apr+19.9%
May-5.3%
Jun+14.3%
Jul+5.8%
Aug-0.1%
Sep-4.0%
Oct-6.4%
Nov+27.8%
Dec+1.3%
2024
Jan—
Feb—
Mar—
Apr—
May—
Jun—
Jul—
Aug—
Sep—
Oct-7.8%
Nov-18.1%
Dec-13.6%
Avg
Jan+11.5%
Feb-11.4%
Mar-10.0%
Apr+10.2%
May-8.4%
Jun+1.6%
Jul+5.8%
Aug-0.1%
Sep-4.0%
Oct-7.1%
Nov+4.8%
Dec-6.2%
Median
Jan+11.5%
Feb-11.4%
Mar-10.0%
Apr+10.2%
May-8.4%
Jun+1.6%
Jul+5.8%
Aug-0.1%
Sep-4.0%
Oct-7.1%
Nov+4.8%
Dec-6.2%
Last 5Y Avg
Jan—
Feb—
Mar—
Apr—
May—
Jun—
Jul—
Aug—
Sep—
Oct—
Nov—
Dec—
Std Dev (σ)
Jan16.7%
Feb7.2%
Mar3.8%
Apr13.7%
May4.3%
Jun17.9%
Jul—
Aug—
Sep—
Oct1.0%
Nov32.4%
Dec10.6%
Consistency (μ/σ)
Jan0.69
Feb-1.59
Mar-2.64
Apr0.75
May-1.94
Jun0.09
Jul—
Aug—
Sep—
Oct-7.43
Nov0.15
Dec-0.58
Win Rate (%)
Jan50%
Feb0%
Mar0%
Apr100%
May0%
Jun50%
Jul100%
Aug0%
Sep0%
Oct0%
Nov50%
Dec50%
Winning / Losing Months
Jan▲1▼1
Feb▲0▼2
Mar▲0▼2
Apr▲2▼0
May▲0▼2
Jun▲1▼1
Jul▲1▼0
Aug▲0▼1
Sep▲0▼1
Oct▲0▼2
Nov▲1▼1
Dec▲1▼1
Longest Win / Loss Streak
Jan▲1▼1
Feb▲0▼2
Mar▲0▼2
Apr▲2▼0
May▲0▼2
Jun▲1▼1
Jul▲1▼0
Aug▲0▼1
Sep▲0▼1
Oct▲0▼2
Nov▲1▼1
Dec▲1▼1
Best
Jan+23.4%2026
Feb-6.3%2025
Mar-7.3%2025
Apr+19.9%2025
May-5.3%2025
Jun+14.3%2025
Jul+5.8%2025
Aug-0.1%2025
Sep-4.0%2025
Oct-6.4%2025
Nov+27.8%2025
Dec+1.3%2025
Worst
Jan-0.3%2025
Feb-16.5%2026
Mar-12.7%2026
Apr+0.6%2026
May-11.4%2026
Jun-11.0%2026
Jul+5.8%2025
Aug-0.1%2025
Sep-4.0%2025
Oct-7.8%2024
Nov-18.1%2024
Dec-13.6%2024
−18.1%+27.8%
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