Amentum Inc.
AMTM | NYSE
$19.90
+$0.30 (+1.53%)
At close: Sep 21, 2026, 4:00 PM ET
$20
+$0.10 (+0.50%)
Pre-market:
Sep 22, 2026, 7:00 AM ET
Market Cap History History
Annual Market Cap Change Annual Change
| Date | Market Cap | Change | % Change |
|---|---|---|---|
| Sep 20, 2026 | $4.86B | -$2.37B | -32.79% |
| Dec 25, 2025 | $7.22B | $2.25B | +45.17% |
| Dec 26, 2024 | $4.98B | n/a | n/a |
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