---
title: "Amentum Holdings Inc. Stock Rises Monday, Outperforms Market"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/298964460.md"
description: "Amentum Holdings Inc. (AMTM) shares rose 1.44% to $19.74 on Monday, outperforming the broader market which saw declines in the S&P 500 and Dow Jones Industrial Average. Despite this daily gain, AMTM remains 48.20% below its 52-week high of $38.11. Trading volume was lower than the 50-day average."
datetime: "2026-09-14T21:19:15.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/298964460.md)
  - [en](https://longbridge.com/en/news/298964460.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/298964460.md)
generator: "portal-rs"
---

# Amentum Holdings Inc. Stock Rises Monday, Outperforms Market

This article was automatically generated by MarketWatch using technology from Automated Insights.

Shares of Amentum Holdings Inc. (AMTM) advanced 1.44% to $19.74 Monday, on what proved to be an all-around dismal trading session for the stock market, with the S&P 500 Index falling 0.48% to 7,619.98 and Dow Jones Industrial Average falling 0.29% to 52,421.20.

Amentum Holdings Inc. closed 48.20% below its 52-week high of $38.11, which the company reached on February 6th.

Trading volume (1.6 M) remained 436,818 below its 50-day average volume of 2.1 M.

Data source: Dow Jones Market Data, FactSet. Data compiled September 14, 2026.

This content was created by MarketWatch, which is operated by Dow Jones & Co. MarketWatch is published independently from Dow Jones Newswires and The Wall Street Journal.

(END) Dow Jones Newswires

09-14-26 1719ET

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---
> **Disclaimer: This article is for reference only and does not constitute any investment advice.**