| 2017-04-10 | Sale | Tetra Tech, Inc. TTEK | director | 16,000 0.028% | $41.31 | $660,922 | +15% | |
| 2016-06-08 | Sale | Tetra Tech, Inc. TTEK | director | 16,000 0.0276% | $30.99 | $495,890 | +30.59% | |
| 2013-02-05 | Sale | Tetra Tech, Inc. TTEK | director | 16,000 0.0247% | $28.44 | $455,096 | -5.72% | |
| 2009-08-13 | Sale | Tetra Tech, Inc. TTEK | director | 16,000 0.026% | $31.00 | $496,070 | -24.23% | |
| 2008-08-22 | Sale | Tetra Tech, Inc. TTEK | director | 13,000 0.0218% | $28.61 | $371,876 | -18.59% |