AMTM Stock Summary and Trading Ideas (Amentum Holdings | NYSE:AMTM)

Amentum Holdings Inc is an engineering and technology solutions provider serving U.S. and allied government agencies, as well as international and commercial customers across energy and environmental, intelligence, space, defense, civilian and commercial markets. It provides environmental remediation, intelligence and counter-threat solutions, data analytics, engineering and integration, testing, training and citizen services. The company operates through two segments: Digital Solutions, offering digital and data-driven services, and Global Engineering Solutions, providing environmental remediation, nuclear power solutions, platform engineering, sustainment, and supply chain management. majority of its revenue comes from the Global Engineering Solutions segment and from the United States.

Amentum Holdings trades on the NYSE stock market under the symbol AMTM.

As of September 24, 2026, AMTM stock price was flat at $19.71 with 392,584 million shares trading.

AMTM has a beta of 1.37, meaning it tends to be more sensitive to market movements. AMTM has a correlation of 0.13 to the broad based SPY ETF.

AMTM has a market cap of $4.82 billion. This is considered a Mid Cap stock.

Last quarter Amentum Holdings reported $3 billion in Revenue and $.67 earnings per share. This fell short of revenue expectation by $-88 million and exceeded earnings estimates by $.06.

The top ETF exchange traded funds that AMTM belongs to (by Net Assets): VTI, VB, VBR, SHLD, VXF.

AMTM has underperformed the market in the last year with a return of -12.6%, while the SPY ETF gained +16.7%. In the last 3 month period, AMTM fell short of the market, returning -6.0%, while SPY returned +4.8%. However, in the most recent 2 weeks AMTM has outperformed the stock market by returning +2.1%, while SPY returned +0.8%.

AMTM support price is $19.32 and resistance is $20.10 (based on 1 day standard deviation move). This means that using the most recent 20 day stock volatility and applying a one standard deviation move around the stock's closing price, stastically there is a 67% probability that AMTM shares will trade within this expected range on the day.