Tetra Tech to Acquire Coffey International Limited for A$0.425/Share in Cash By: Benzinga via Benzinga October 14, 2015 at 04:20 AM EDT Tetra Tech, Inc. (NASDAQ: TTEK) and Coffey International Limited (ASX: COF) are pleased to announce the execution of ... Read More >> Related Stocks: Macy's Tetra Tech Inc