PASADENA, Calif.–(BUSINESS WIRE)– #leadingwithscience–Tetra Tech, Inc. (NASDAQ: TTEK), a global provider of high-end technical and engineering services, Leading with Science® in water, environment and sustainable infrastructure, today announced results for the fourth quarter and fiscal year ended September 27, 2026. Fourth Quarter Results Revenue and revenue, net of subcontractor costs (net revenue)1, in the fourth quarter totaled $1.34 billion and $1.15 billion, respectively. Net revenue increased 5% year-over-y