Water Infrastructure Stocks Surge 7% on Earnings Surprise, Adding 1 Trillion Won in Market Cap in a Day

Tetra Tech Inc. (NASDAQ: TTEK), a U.S. environmental and water‐resources engineering firm, jumped 7.58% on the Nasdaq to close at $33.76.

In a single trading day, its market capitalization rose by about $720 million (roughly ₩1 trillion), bringing total market value to approximately $8.8 billion (around ₩12 trillion).

In its second quarter of fiscal 2026, the company reported revenue of $1.22 billion and net revenue of $1.05 billion. It also raised its full‐year net revenue guidance to $4.25–4.40 billion (₩5.7–6 trillion) and its adjusted EPS outlook to $1.50–1.58.

This month, Tetra Tech secured multi-year contracts for water infrastructure and data analytics from Waterschap Aa en Maas in the Netherlands and Northern Ireland Water, further expanding its footprint in European wastewater treatment and flood-response projects.

Headquartered in Pasadena, California, Tetra Tech provides consulting and engineering services in water management, environmental protection, and sustainable infrastructure to U.S. federal and state agencies as well as international public clients.

Since its founding in 1966, the company has grown on the strength of government-commissioned water and environmental projects. It is now focusing on high-value-added services by combining data analytics with digital solutions.