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BlackRock Inc.
> TTEK
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2023 | TETRA TECH INC | TTEK | 5,387,563 | -48,217 | 882,159,613,000 | 83,589,154,000 | $163,740.01 |
| 03/31/2023 | TETRA TECH INC | TTEK | 5,435,780 | -474,643 | 798,570,459,000 | 797,810,793,000 | $146,910.00 |
| 09/30/2022 | TETRA TECH INC | TTEK | 5,910,423 | -134,396 | 759,666,000 | -65,753,000 | $128.53 |
| 06/30/2022 | TETRA TECH INC | TTEK | 6,044,819 | -1,168,058 | 825,419,000 | -364,274,000 | $136.55 |
| 03/31/2022 | TETRA TECH INC | TTEK | 7,212,877 | 171,026 | 1,189,693,000 | -6,014,000 | $164.94 |
| 12/31/2021 | TETRA TECH INC | TTEK | 7,041,851 | 327,928 | 1,195,707,000 | 193,048,000 | $169.80 |
| 09/30/2021 | TETRA TECH INC | TTEK | 6,713,923 | -22,949 | 1,002,659,000 | 180,493,000 | $149.34 |
| 06/30/2021 | TETRA TECH INC | TTEK | 6,736,872 | -175,020 | 822,166,000 | -115,915,000 | $122.04 |
| 03/31/2021 | TETRA TECH INC | TTEK | 6,911,892 | 183,315 | 938,081,000 | 159,047,000 | $135.72 |
| 12/31/2020 | TETRA TECH INC | TTEK | 6,728,577 | 422,687 | 779,034,000 | 176,822,000 | $115.78 |
| 09/30/2020 | TETRA TECH INC | TTEK | 6,305,890 | -234,975 | 602,212,000 | 84,699,000 | $95.50 |
| 06/30/2020 | TETRA TECH INC | TTEK | 6,540,865 | 72,505 | 517,513,000 | 60,718,000 | $79.12 |
| 03/31/2020 | TETRA TECH INC | TTEK | 6,468,360 | -325,583 | 456,795,000 | -128,571,000 | $70.62 |
| 12/31/2019 | TETRA TECH INC | TTEK | 6,793,943 | 60,824 | 585,366,000 | 1,200,000 | $86.16 |
| 09/30/2019 | TETRA TECH INC | TTEK | 6,733,119 | -1,854,613 | 584,166,000 | 583,491,432 | $86.76 |
| 06/30/2019 | TETRA TECH INC | TTEK | 8,587,732 | -228,966 | 674,568 | -524,712,432 | $0.08 |
| 03/31/2019 | TETRA TECH INC | TTEK | 8,816,698 | 259,378 | 525,387,000 | 82,373,000 | $59.59 |
| 12/31/2018 | TETRA TECH INC | TTEK | 8,557,320 | 139,246 | 443,014,000 | -131,941,000 | $51.77 |
| 09/30/2018 | TETRA TECH INC | TTEK | 8,418,074 | 251,711 | 574,955,000 | 97,222,000 | $68.30 |
| 06/30/2018 | TETRA TECH INC | TTEK | 8,166,363 | 691,409 | 477,733,000 | 111,833,000 | $58.50 |
| 03/31/2018 | TETRA TECH INC | TTEK | 7,474,954 | 150,955 | 365,900,000 | 13,249,000 | $48.95 |
| 12/31/2017 | TETRA TECH INC | TTEK | 7,323,999 | -291,808 | 352,651,000 | -1,865,000 | $48.15 |
| 09/30/2017 | TETRA TECH INC | TTEK | 7,615,807 | -520,022 | 354,516,000 | 22,167,000 | $46.55 |
| 03/31/2017 | TETRA TECH INC | TTEK | 8,135,829 | 8,068,959 | 332,349,000 | 329,464,000 | $40.85 |
| 12/31/2016 | TETRA TECH INC | TTEK | 66,870 | 11,893 | 2,885,000 | 935,000 | $43.14 |
| 09/30/2016 | TETRA TECH INC | TTEK | 54,977 | 54,977 | 1,950,000 | 1,950,000 | $35.47 |
| 06/30/2016 | TETRA TECH INC | TTEK | 52,226 | 25,709 | 1,605,000 | 814,000 | $30.73 |
| 03/31/2016 | TETRA TECH INC | TTEK | 26,517 | 1,993 | 791,000 | 152,000 | $29.83 |
| 12/31/2015 | TETRA TECH INC | TTEK | 24,524 | 2,762 | 639,000 | 110,000 | $26.06 |
| 09/30/2015 | TETRA TECH INC | TTEK | 21,762 | -251 | 529,000 | -36,000 | $24.31 |
| 06/30/2015 | TETRA TECH INC | TTEK | 22,013 | 1,831 | 565,000 | 80,000 | $25.67 |
| 03/31/2015 | TETRA TECH INC | TTEK | 20,182 | 1,643 | 485,000 | -10,000 | $24.03 |
| 12/31/2014 | TETRA TECH INC | TTEK | 18,539 | -2,091 | 495,000 | -20,000 | $26.70 |
| 09/30/2014 | TETRA TECH INC | TTEK | 20,630 | -710 | 515,000 | -72,000 | $24.96 |
| 06/30/2014 | TETRA TECH INC | TTEK | 21,340 | 721 | 587,000 | -24,000 | $27.51 |
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