TTEK ▲ +0.7% - Tetra Tech, Inc. $TTEK - Tetra Tech Announces $500 Million Increase to its Share Repurchase Program Tetra Tech announced a $500 million increase to its share repurchase authorization, a move that typically signals management confidence in the company's financial position and can support the stock price through reduced share count. The stock rose 0.7% on the news. 10-SEP-2026 09:04 AM ET