Quiet Defense and Space Startups See Market Cap Increase of 460 Billion Won in Just One Day

Amentum Holdings Inc. (AMTM) closed at $21.39 on July 1 on the New York Stock Exchange, up 5.89%. Trading volume reached about 1.42 million shares, lifting its market capitalization to roughly $5.2 billion (approximately KRW 7.3 trillion), an increase of about $330 million (around KRW 460 billion) in a single day.

In its fiscal 2026 second-quarter results, the company reported revenue of $3.48 billion, net income of $54 million, and adjusted EPS of $0.60, reaffirming its full-year guidance. Amentum has also been bolstering its profile as a key partner to the U.S. government and its space programs, most recently by supporting ground system operations for NASA’s Artemis II crewed mission.

Headquartered in Chantilly, Virginia, Amentum is a leading engineering and technical solutions provider serving the U.S. federal government and allied nations. Its offerings include intelligence analytics, cybersecurity, space systems, nuclear and environmental remediation, and defense logistics and maintenance. Since listing on the New York Stock Exchange in 2024, the company’s growth prospects have been underpinned by large government contracts in the defense and government services sector and a track record of strategic mergers and acquisitions.