| 2023-12-01 | Sale | Tetra Tech, Inc. TTEK | director | 2,228 0.0042% | $162.74 | $362,590 | +12.35% | |
| 2023-11-20 | Sale | Tetra Tech, Inc. TTEK | director | 559 0.0011% | $165.50 | $92,515 | +9.75% | |
| 2023-02-16 | Sale | Tetra Tech, Inc. TTEK | director | 900 0.0017% | $145.74 | $131,167 | +9.67% | |
| 2022-12-06 | Sale | Tetra Tech, Inc. TTEK | director | 700 0.0013% | $154.61 | $108,225 | -0.24% | |
| 2022-08-19 | Sale | Tetra Tech, Inc. TTEK | 1,200 0.0023% | $144.66 | $173,594 | -0.22% | ||
| 2022-06-01 | Sale | Tetra Tech, Inc. TTEK | 550 0.001% | $135.41 | $74,477 | +4.75% | ||
| 2022-03-08 | Sale | Tetra Tech, Inc. TTEK | director | 900 0.0017% | $156.34 | $140,702 | -6.73% | |
| 2021-12-07 | Sale | Tetra Tech, Inc. TTEK | director | 700 0.0013% | $189.62 | $132,732 | -23.99% | |
| 2021-06-07 | Sale | Tetra Tech, Inc. TTEK | director | 5,575 0.0102% | $119.15 | $664,261 | +24.4% | |
| 2020-12-08 | Sale | Tetra Tech, Inc. TTEK | director | 6,468 0.0121% | $120.16 | $777,199 | +12.54% | |
| 2020-11-23 | Sale | Tetra Tech, Inc. TTEK | director | 950 0.0018% | $122.20 | $116,092 | +9% | |
| 2020-11-16 | Sale | Tetra Tech, Inc. TTEK | director | 997 0.0018% | $122.26 | $121,895 | +7.16% | |
| 2020-08-26 | Sale | Tetra Tech, Inc. TTEK | director | 800 0.0015% | $93.44 | $74,752 | +33.17% | |
| 2020-05-07 | Sale | Tetra Tech, Inc. TTEK | director | 2,702 0.005% | $70.56 | $190,662 | +56.71% | |
| 2019-12-10 | Sale | Tetra Tech, Inc. TTEK | director | 850 0.0016% | $85.98 | $73,087 | +2.09% | |
| 2019-08-14 | Sale | Tetra Tech, Inc. TTEK | director | 8,000 0.0147% | $78.00 | $624,000 | +9.12% | |
| 2018-11-14 | Sale | Tetra Tech, Inc. TTEK | director | 2,400 0.0045% | $66.94 | $160,650 | +4.41% |