16% Drop in 5 Days… $800 Million Vanishes from Infrastructure Leader

Jacobs Solutions Inc., a U.S. infrastructure and engineering specialist, saw its shares decline 5.05% to $108.39 on the New York Stock Exchange on the 13th, wiping out roughly $600 million (about KRW 800 billion) in market value. Trading volume that day was approximately 1.39 million shares, and the company’s market capitalization now stands at about $12.8 billion (around KRW 18 trillion).

Last week, in its fiscal 2026 second-quarter results, Jacobs Solutions reported revenue growth and raised its full-year guidance. However, a one-off net loss for the quarter spurred investor concerns. Over the past five trading days, its share price has slid roughly 16%, erasing about $2.6 billion (more than KRW 3 trillion) from its market value.

Headquartered in Dallas, Texas, Jacobs Solutions is a global technology and professional services firm that provides consulting, design, and project management services for large-scale infrastructure and public-sector projects—including transportation, water resources, environmental, nuclear, space, and defense. The company has consistently ranked among the top design firms in Engineering News-Record’s annual listings.