Tetra Tech, Inc.

Volpi Kirsten M sold 1,700 shares of TTEK on 4 June. They now own 6,300 TTEK shares.

Volpi Kirsten M bought 1,700 shares of TTEK on 4 June. They now own 71,918 TTEK shares.

Feeler Jeffrey R bought 1,900 shares of TTEK on 15 May. They now own 1,900 TTEK shares.

Thornburg Eric W bought 1,259 shares of TTEK on 27 April. They now own 1,259 TTEK shares.

Thornburg Eric W bought 0 shares of TTEK on 30 March. They now own 0 TTEK shares.

Ritrievi Kimberly E bought 1,900 shares of TTEK on 16 March. They now own 162,533 TTEK shares.

Ritrievi Kimberly E bought 1,925 shares of TTEK on 16 March. They now own 154,083 TTEK shares.

Ritrievi Kimberly E bought 795 shares of TTEK on 16 March. They now own 160,633 TTEK shares.

Ritrievi Kimberly E bought 2,250 shares of TTEK on 16 March. They now own 152,158 TTEK shares.

Ritrievi Kimberly E bought 4,500 shares of TTEK on 16 March. They now own 149,908 TTEK shares.

Ritrievi Kimberly E bought 2,125 shares of TTEK on 16 March. They now own 164,658 TTEK shares.

Ritrievi Kimberly E sold 1,925 shares of TTEK on 16 March. They now own 1,925 TTEK shares.

Ritrievi Kimberly E bought 25,883 shares of TTEK on 16 March. They now own 192,259 TTEK shares.

Ritrievi Kimberly E sold 1,718 shares of TTEK on 16 March. They now own 0 TTEK shares.

Ritrievi Kimberly E bought 2,050 shares of TTEK on 16 March. They now own 159,043 TTEK shares.

Ritrievi Kimberly E bought 795 shares of TTEK on 16 March. They now own 159,838 TTEK shares.

Ritrievi Kimberly E bought 2,910 shares of TTEK on 16 March. They now own 156,993 TTEK shares.

Ritrievi Kimberly E bought 1,718 shares of TTEK on 16 March. They now own 166,376 TTEK shares.

Ritrievi Kimberly E sold 2,250 shares of TTEK on 16 March. They now own 2,250 TTEK shares.

Argus Roger R bought 28,174 shares of TTEK on 19 February. They now own 28,174 TTEK shares.

Obiaya Christiana bought 495 shares of TTEK on 19 February. They now own 9,666 TTEK shares.

Obiaya Christiana sold 495 shares of TTEK on 19 February. They now own 0 TTEK shares.

Volpi Kirsten M bought 1,000 shares of TTEK on 10 February. They now own 70,218 TTEK shares.

Volpi Kirsten M sold 1,000 shares of TTEK on 10 February. They now own 8,000 TTEK shares.

Burdick Steven M sold 11,100 shares of TTEK on 6 February. They now own 138,251 TTEK shares.

Carter Brian N sold 9,979 shares of TTEK on 4 February. They now own 46,496 TTEK shares.

Feeler Jeffrey R bought 1,754 shares of TTEK on 26 January. They now own 1,754 TTEK shares.

Hardwick M Susan bought 1,754 shares of TTEK on 26 January. They now own 1,754 TTEK shares.

Birkenbeuel Gary sold 1,590 shares of TTEK on 12 January. They now own 0 TTEK shares.

Birkenbeuel Gary bought 1,590 shares of TTEK on 12 January. They now own 46,635 TTEK shares.

Ritrievi Kimberly E bought 2,208 shares of TTEK on 12 January. They now own 145,408 TTEK shares.

Birkenbeuel Gary bought 4,397 shares of TTEK on 12 January. They now own 51,032 TTEK shares.

Feeler Jeffrey R bought 0 shares of TTEK on 29 December. They now own 0 TTEK shares.

Hardwick M Susan bought 0 shares of TTEK on 29 December. They now own 0 TTEK shares.

Hopson Preston sold 2,455 shares of TTEK on 30 November. They now own 7,363 TTEK shares.

Carter Brian N sold 1,500 shares of TTEK on 30 November. They now own 56,475 TTEK shares.

Batrack Dan L bought 19,330 shares of TTEK on 30 November. They now own 354,894 TTEK shares.

Burdick Steven M sold 3,682 shares of TTEK on 30 November. They now own 11,046 TTEK shares.

Burdick Steven M sold 4,044 shares of TTEK on 30 November. They now own 149,219 TTEK shares.

Shoemaker Leslie L sold 3,707 shares of TTEK on 30 November. They now own 325,821 TTEK shares.

Hopson Preston bought 2,455 shares of TTEK on 30 November. They now own 85,186 TTEK shares.

Batrack Dan L sold 19,330 shares of TTEK on 30 November. They now own 57,990 TTEK shares.

Argus Roger R bought 2,455 shares of TTEK on 30 November. They now own 42,755 TTEK shares.

Argus Roger R sold 2,865 shares of TTEK on 30 November. They now own 39,890 TTEK shares.

Burdick Steven M sold 3,645 shares of TTEK on 30 November. They now own 7,285 TTEK shares.

Obiaya Christiana bought 1,718 shares of TTEK on 30 November. They now own 9,171 TTEK shares.

Gandhi Prashant sold 1,718 shares of TTEK on 30 November. They now own 0 TTEK shares.

Volpi Kirsten M bought 1,718 shares of TTEK on 30 November. They now own 68,218 TTEK shares.

Shoemaker Leslie L bought 3,682 shares of TTEK on 30 November. They now own 329,528 TTEK shares.

Batrack Dan L bought 21,255 shares of TTEK on 30 November. They now own 335,564 TTEK shares.

Carter Brian N bought 1,520 shares of TTEK on 30 November. They now own 56,747 TTEK shares.

Gandhi Prashant bought 1,718 shares of TTEK on 30 November. They now own 16,553 TTEK shares.

Argus Roger R sold 2,455 shares of TTEK on 30 November. They now own 7,363 TTEK shares.

Carter Brian N sold 1,228 shares of TTEK on 30 November. They now own 3,681 TTEK shares.

Shoemaker Leslie L sold 3,682 shares of TTEK on 30 November. They now own 11,046 TTEK shares.

Carter Brian N bought 1,228 shares of TTEK on 30 November. They now own 57,975 TTEK shares.

Hopson Preston sold 2,735 shares of TTEK on 30 November. They now own 5,460 TTEK shares.

Obiaya Christiana sold 1,718 shares of TTEK on 30 November. They now own 0 TTEK shares.

Burdick Steven M bought 3,682 shares of TTEK on 30 November. They now own 153,263 TTEK shares.

Volpi Kirsten M sold 1,718 shares of TTEK on 30 November. They now own 0 TTEK shares.

Hopson Preston bought 2,735 shares of TTEK on 30 November. They now own 82,731 TTEK shares.

Shoemaker Leslie L sold 3,035 shares of TTEK on 30 November. They now own 6,070 TTEK shares.

Batrack Dan L sold 21,255 shares of TTEK on 30 November. They now own 42,505 TTEK shares.

Carter Brian N sold 1,520 shares of TTEK on 30 November. They now own 3,030 TTEK shares.

Shoemaker Leslie L bought 3,035 shares of TTEK on 30 November. They now own 325,846 TTEK shares.

Burdick Steven M bought 3,645 shares of TTEK on 30 November. They now own 149,581 TTEK shares.

Batrack Dan L sold 22,396 shares of TTEK on 30 November. They now own 332,498 TTEK shares.

Hopson Preston sold 2,044 shares of TTEK on 30 November. They now own 83,142 TTEK shares.

Argus Roger R sold 2,735 shares of TTEK on 30 November. They now own 5,460 TTEK shares.

Argus Roger R bought 2,735 shares of TTEK on 30 November. They now own 40,300 TTEK shares.

Volpi Kirsten M sold 1,000 shares of TTEK on 28 November. They now own 9,000 TTEK shares.

Volpi Kirsten M bought 1,000 shares of TTEK on 28 November. They now own 69,218 TTEK shares.

Batrack Dan L bought 101,010 shares of TTEK on 19 November. They now own 101,010 TTEK shares.

Hopson Preston bought 14,029 shares of TTEK on 19 November. They now own 14,029 TTEK shares.

Ritrievi Kimberly E bought 1,964 shares of TTEK on 19 November. They now own 1,964 TTEK shares.

Burdick Steven M bought 19,641 shares of TTEK on 19 November. They now own 19,641 TTEK shares.

Obiaya Christiana bought 1,964 shares of TTEK on 19 November. They now own 1,964 TTEK shares.

Volpi Kirsten M bought 1,964 shares of TTEK on 19 November. They now own 1,964 TTEK shares.

Gandhi Prashant bought 1,964 shares of TTEK on 19 November. They now own 1,964 TTEK shares.

Shoemaker Leslie L bought 19,641 shares of TTEK on 19 November. They now own 19,641 TTEK shares.

Birkenbeuel Gary bought 1,964 shares of TTEK on 19 November. They now own 1,964 TTEK shares.

Carter Brian N bought 5,612 shares of TTEK on 19 November. They now own 5,612 TTEK shares.

Argus Roger R bought 19,641 shares of TTEK on 19 November. They now own 19,641 TTEK shares.

Batrack Dan L bought 14,030 shares of TTEK on 18 November. They now own 239,897 TTEK shares.

Burdick Steven M sold 3,141 shares of TTEK on 18 November. They now own 133,664 TTEK shares.

Carter Brian N sold 5,977 shares of TTEK on 18 November. They now own 55,227 TTEK shares.

Burdick Steven M bought 2,520 shares of TTEK on 18 November. They now own 133,635 TTEK shares.

Shoemaker Leslie L sold 2,520 shares of TTEK on 18 November. They now own 0 TTEK shares.

Burdick Steven M sold 15,112 shares of TTEK on 18 November. They now own 145,936 TTEK shares.

Hopson Preston sold 2,055 shares of TTEK on 18 November. They now own 0 TTEK shares.

Shoemaker Leslie L bought 3,170 shares of TTEK on 18 November. They now own 313,680 TTEK shares.

Volpi Kirsten M bought 4,104 shares of TTEK on 18 November. They now own 66,500 TTEK shares.

Hopson Preston sold 1,807 shares of TTEK on 18 November. They now own 66,714 TTEK shares.

Batrack Dan L sold 14,030 shares of TTEK on 18 November. They now own 0 TTEK shares.

Hopson Preston bought 21,902 shares of TTEK on 18 November. They now own 88,616 TTEK shares.

Burdick Steven M sold 3,170 shares of TTEK on 18 November. They now own 3,165 TTEK shares.

Hopson Preston sold 2,535 shares of TTEK on 18 November. They now own 2,535 TTEK shares.

Shoemaker Leslie L bought 2,520 shares of TTEK on 18 November. They now own 310,510 TTEK shares.

Gandhi Prashant bought 4,104 shares of TTEK on 18 November. They now own 14,835 TTEK shares.

Carter Brian N bought 995 shares of TTEK on 18 November. They now own 50,219 TTEK shares.

Obiaya Christiana bought 3,643 shares of TTEK on 18 November. They now own 7,453 TTEK shares.

Argus Roger R bought 2,055 shares of TTEK on 18 November. They now own 27,747 TTEK shares.

Shoemaker Leslie L sold 3,141 shares of TTEK on 18 November. They now own 310,539 TTEK shares.

Batrack Dan L bought 19,015 shares of TTEK on 18 November. They now own 258,912 TTEK shares.

Carter Brian N sold 995 shares of TTEK on 18 November. They now own 0 TTEK shares.

Batrack Dan L sold 19,015 shares of TTEK on 18 November. They now own 19,010 TTEK shares.

Batrack Dan L sold 90,653 shares of TTEK on 18 November. They now own 314,309 TTEK shares.

Shoemaker Leslie L sold 3,170 shares of TTEK on 18 November. They now own 3,165 TTEK shares.

Batrack Dan L sold 18,235 shares of TTEK on 18 November. They now own 240,677 TTEK shares.

Argus Roger R sold 2,055 shares of TTEK on 18 November. They now own 0 TTEK shares.

Carter Brian N bought 10,954 shares of TTEK on 18 November. They now own 61,204 TTEK shares.

Argus Roger R sold 2,535 shares of TTEK on 18 November. They now own 2,535 TTEK shares.

Argus Roger R bought 21,902 shares of TTEK on 18 November. They now own 49,651 TTEK shares.

Burdick Steven M bought 27,384 shares of TTEK on 18 November. They now own 161,048 TTEK shares.

Batrack Dan L bought 164,285 shares of TTEK on 18 November. They now own 404,962 TTEK shares.

Shoemaker Leslie L bought 27,384 shares of TTEK on 18 November. They now own 337,923 TTEK shares.

Carter Brian N sold 1,234 shares of TTEK on 18 November. They now own 50,250 TTEK shares.

Carter Brian N sold 1,265 shares of TTEK on 18 November. They now own 1,265 TTEK shares.

Argus Roger R sold 2,533 shares of TTEK on 18 November. They now own 27,749 TTEK shares.

Argus Roger R bought 2,535 shares of TTEK on 18 November. They now own 30,282 TTEK shares.

Hopson Preston bought 2,055 shares of TTEK on 18 November. They now own 65,986 TTEK shares.

Hopson Preston sold 8,620 shares of TTEK on 18 November. They now own 79,996 TTEK shares.

Burdick Steven M sold 2,520 shares of TTEK on 18 November. They now own 0 TTEK shares.

Burdick Steven M bought 3,170 shares of TTEK on 18 November. They now own 136,805 TTEK shares.

Shoemaker Leslie L sold 15,112 shares of TTEK on 18 November. They now own 322,811 TTEK shares.

Argus Roger R sold 12,086 shares of TTEK on 18 November. They now own 37,565 TTEK shares.

Carter Brian N bought 1,265 shares of TTEK on 18 November. They now own 51,484 TTEK shares.

Hopson Preston bought 2,535 shares of TTEK on 18 November. They now own 68,521 TTEK shares.

Birkenbeuel Gary sold 2,390 shares of TTEK on 14 August. They now own 37,725 TTEK shares.

Douglas John M. sold 108 shares of TTEK on 27 February. They now own 610 TTEK shares.

Douglas John M. sold 466 shares of TTEK on 27 February. They now own 0 TTEK shares.

Douglas John M. bought 718 shares of TTEK on 27 February. They now own 718 TTEK shares.

Volpi Kirsten M sold 6,000 shares of TTEK on 5 February. They now own 10,000 TTEK shares.

Volpi Kirsten M bought 6,000 shares of TTEK on 5 February. They now own 66,196 TTEK shares.

Volpi Kirsten M sold 3,800 shares of TTEK on 5 February. They now own 62,396 TTEK shares.

Volpi Kirsten M sold 4,100 shares of TTEK on 4 February. They now own 64,541 TTEK shares.

Volpi Kirsten M sold 1,671 shares of TTEK on 4 February. They now own 68,641 TTEK shares.

Volpi Kirsten M sold 4,345 shares of TTEK on 4 February. They now own 60,196 TTEK shares.

Birkenbeuel Gary bought 5,270 shares of TTEK on 1 January. They now own 42,995 TTEK shares.

Birkenbeuel Gary bought 2,050 shares of TTEK on 1 January. They now own 45,045 TTEK shares.

Hopson Preston Iii bought 2,735 shares of TTEK on 30 November. They now own 64,859 TTEK shares.

Volpi Kirsten M bought 2,125 shares of TTEK on 30 November. They now own 70,312 TTEK shares.

Shoemaker Leslie L sold 1,675 shares of TTEK on 30 November. They now own 307,841 TTEK shares.

Shoemaker Leslie L bought 3,040 shares of TTEK on 30 November. They now own 309,516 TTEK shares.

Obiaya Christiana sold 2,125 shares of TTEK on 30 November. They now own 0 TTEK shares.

Batrack Dan L bought 21,255 shares of TTEK on 30 November. They now own 237,426 TTEK shares.

Obiaya Christiana bought 2,125 shares of TTEK on 30 November. They now own 3,810 TTEK shares.

Burdick Steven M sold 3,645 shares of TTEK on 30 November. They now own 10,930 TTEK shares.

Argus Roger R sold 1,507 shares of TTEK on 30 November. They now own 25,543 TTEK shares.

Burdick Steven M bought 3,645 shares of TTEK on 30 November. They now own 132,974 TTEK shares.

Argus Roger R sold 2,735 shares of TTEK on 30 November. They now own 8,195 TTEK shares.

Carter Brian N bought 1,520 shares of TTEK on 30 November. They now own 50,052 TTEK shares.

Gandhi Prashant bought 2,125 shares of TTEK on 30 November. They now own 10,731 TTEK shares.

Carter Brian N sold 1,520 shares of TTEK on 30 November. They now own 4,550 TTEK shares.

Argus Roger R bought 2,735 shares of TTEK on 30 November. They now own 27,050 TTEK shares.

Shoemaker Leslie L sold 3,040 shares of TTEK on 30 November. They now own 9,105 TTEK shares.

Volpi Kirsten M sold 2,125 shares of TTEK on 30 November. They now own 0 TTEK shares.

Batrack Dan L sold 21,255 shares of TTEK on 30 November. They now own 63,760 TTEK shares.

Batrack Dan L sold 11,708 shares of TTEK on 30 November. They now own 225,718 TTEK shares.

Hopson Preston Iii sold 2,735 shares of TTEK on 30 November. They now own 8,195 TTEK shares.

Burdick Steven M sold 2,008 shares of TTEK on 30 November. They now own 130,966 TTEK shares.

Hopson Preston Iii sold 1,077 shares of TTEK on 30 November. They now own 63,782 TTEK shares.

Gandhi Prashant sold 2,125 shares of TTEK on 30 November. They now own 0 TTEK shares.

Carter Brian N sold 828 shares of TTEK on 30 November. They now own 49,224 TTEK shares.

Shoemaker Leslie L bought 14,728 shares of TTEK on 20 November. They now own 14,728 TTEK shares.

Douglas John M. bought 1,718 shares of TTEK on 20 November. They now own 1,718 TTEK shares.

Hopson Preston Iii bought 22,705 shares of TTEK on 20 November. They now own 71,059 TTEK shares.

Batrack Dan L bought 77,320 shares of TTEK on 20 November. They now own 77,320 TTEK shares.

Batrack Dan L bought 154,901 shares of TTEK on 20 November. They now own 301,491 TTEK shares.

Ritrievi Kimberly E sold 0 shares of TTEK on 20 November. They now own 143,200 TTEK shares.

Carter Brian N sold 5,982 shares of TTEK on 20 November. They now own 48,532 TTEK shares.

Hopson Preston Iii sold 8,935 shares of TTEK on 20 November. They now own 62,124 TTEK shares.

Argus Roger R bought 22,705 shares of TTEK on 20 November. They now own 36,822 TTEK shares.

Argus Roger R sold 12,507 shares of TTEK on 20 November. They now own 24,315 TTEK shares.

Batrack Dan L sold 85,320 shares of TTEK on 20 November. They now own 216,171 TTEK shares.

Shoemaker Leslie L bought 13,920 shares of TTEK on 20 November. They now own 314,144 TTEK shares.

Gandhi Prashant bought 1,718 shares of TTEK on 20 November. They now own 1,718 TTEK shares.

Burdick Steven M bought 27,830 shares of TTEK on 20 November. They now own 144,659 TTEK shares.

Obiaya Christiana bought 1,718 shares of TTEK on 20 November. They now own 1,718 TTEK shares.

Carter Brian N bought 10,984 shares of TTEK on 20 November. They now own 54,514 TTEK shares.

Carter Brian N bought 4,909 shares of TTEK on 20 November. They now own 4,909 TTEK shares.

Volpi Kirsten M bought 1,718 shares of TTEK on 20 November. They now own 1,718 TTEK shares.

Argus Roger R bought 9,818 shares of TTEK on 20 November. They now own 9,818 TTEK shares.

Burdick Steven M bought 14,728 shares of TTEK on 20 November. They now own 14,728 TTEK shares.

Birkenbeuel Gary bought 1,718 shares of TTEK on 20 November. They now own 1,718 TTEK shares.

Burdick Steven M sold 15,330 shares of TTEK on 20 November. They now own 129,329 TTEK shares.

Ritrievi Kimberly E bought 1,718 shares of TTEK on 20 November. They now own 1,718 TTEK shares.

Volpi Kirsten M bought 4,397 shares of TTEK on 20 November. They now own 68,187 TTEK shares.

Hopson Preston Iii bought 9,818 shares of TTEK on 20 November. They now own 9,818 TTEK shares.

Shoemaker Leslie L sold 7,668 shares of TTEK on 20 November. They now own 306,476 TTEK shares.

Ritrievi Kimberly E bought 2,390 shares of TTEK on 20 November. They now own 145,590 TTEK shares.

Gandhi Prashant bought 4,921 shares of TTEK on 20 November. They now own 8,606 TTEK shares.

Hopson Preston Iii sold 3,070 shares of TTEK on 18 November. They now own 0 TTEK shares.

Hopson Preston Iii sold 2,055 shares of TTEK on 18 November. They now own 2,055 TTEK shares.

Hopson Preston Iii sold 3,016 shares of TTEK on 18 November. They now own 48,354 TTEK shares.

Shoemaker Leslie L bought 3,170 shares of TTEK on 18 November. They now own 305,390 TTEK shares.

Hopson Preston Iii bought 2,535 shares of TTEK on 18 November. They now own 51,370 TTEK shares.

Hopson Preston Iii bought 3,070 shares of TTEK on 18 November. They now own 46,780 TTEK shares.

Hopson Preston Iii sold 2,535 shares of TTEK on 18 November. They now own 5,070 TTEK shares.

Hopson Preston Iii bought 2,055 shares of TTEK on 18 November. They now own 48,835 TTEK shares.