Tetra Tech, Inc.
MX ˙ BMV ˙ US88162G1031
SecurityMX:TTEK / Tetra Tech, Inc.
InstitutionAmeriprise Financial Inc
Latest Disclosed Ownership2,020,925 shares
Latest Disclosed Value $ 60,870,260
Ameriprise Financial Inc reports 22.68% decrease in ownership of TTEK / Tetra Tech, Inc.

On May 15, 2026 - Ameriprise Financial Inc filed a 13F-HR form disclosing ownership of 2,020,925 shares of Tetra Tech, Inc. (MX:TTEK) valued at $60,870,260 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 2,613,627 shares of Tetra Tech, Inc.. This represents a change in shares of -22.68% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F TETRA TECH COM 88162G103 2,020,925 -592,702 -22.68 60,870 -30.56 0.0026
2026-02-17 2025-12-31 13F TETRA TECH COM 88162G103 2,613,627 77,609 3.06 87,661 3.55 0.0198
2025-11-14 2025-09-30 13F TETRA TECH COM 88162G103 2,536,018 139,037 5.80 84,652 -1.79 0.0194
2025-08-14 2025-06-30 13F TETRA TECH COM 88162G103 2,396,981 873,172 57.30 86,195 93.39 0.0212
2025-05-14 2025-03-31 13F TETRA TECH COM 88162G103 1,523,809 656,872 75.77 44,571 29.05 0.0120
2025-02-14 2024-12-31 13F TETRA TECH COM 88162G103 866,937 119,804 16.04 34,539 -1.98 0.0089
2024-11-14 2024-09-30 13F TETRA TECH COM 88162G103 747,133 597,555 399.49 35,235 15.20 0.0090
2024-08-14 2024-06-30 13F TETRA TECH COM 88162G103 149,578 4,459 3.07 30,586 14.08 0.0083
2024-05-15 2024-03-31 13F TETRA TECH COM 88162G103 145,119 52,171 56.13 26,810 72.80 0.0074
2024-02-14 2023-12-31 13F TETRA TECH COM 88162G103 92,948 -103,388 -52.66 15,516 -48.01 0.0046
2023-11-14 2023-09-30 13F TETRA TECH COM 88162G103 196,336 109,480 126.05 29,840 110.10 0.0098
2023-08-14 2023-06-30 13F TETRA TECH COM 88162G103 86,856 -11,692 -11.86 14,204 -1.88 0.0045
2023-05-22 2023-03-31 13F/A-1 TETRA TECH COM 88162G103 98,548 3,375 3.55 14,475 4.75 0.0047
2023-05-15 2023-03-31 13F TETRA TECHNOLOGIES COM 88162G103 98,548 3,375 14,475 0.0047
2023-02-14 2022-12-31 13F TETRA TECH COM 88162G103 95,173 -2,670 -2.73 13,819 9.89 0.0047
2022-11-14 2022-09-30 13F TETRA TECH COM 88162G103 97,843 7,119 7.85 12,575 1.51 0.0047
2022-08-15 2022-06-30 13F TETRA TECH COM 88162G103 90,724 2,283 2.58 12,388 -15.08 0.0043
2022-05-16 2022-03-31 13F TETRA TECH COM 88162G103 88,441 -12,466 -12.35 14,588 -14.87 0.0043
2022-02-14 2021-12-31 13F TETRA TECH COM 88162G103 100,907 -5,165 -4.87 17,137 7.71 0.0047
2021-11-15 2021-09-30 13F TETRA TECH COM 88162G103 106,072 -32,727 -23.58 15,910 -6.07 0.0051
2021-08-16 2021-06-30 13F TETRA TECH COM 88162G103 138,799 3,408 2.52 16,938 -7.94 0.0052
2021-05-17 2021-03-31 13F TETRA TECH COM 88162G103 135,391 18,018 15.35 18,398 35.39 0.0061
2021-02-12 2020-12-31 13F TETRA TECH COM 88162G103 117,373 -26,243 -18.27 13,589 -0.95 0.0048
2020-11-16 2020-09-30 13F TETRA TECH COM 88162G103 143,616 -9,732 -6.35 13,719 13.09 0.0056
2020-08-14 2020-06-30 13F TETRA TECH COM 88162G103 153,348 -8,072 -5.00 12,131 6.35 0.0052
2020-05-15 2020-03-31 13F TETRA TECH COM 88162G103 161,420 -7,586 -4.49 11,407 -21.66 0.0060
2020-02-14 2019-12-31 13F TETRA TECH COM 88162G103 169,006 -6,414 -3.66 14,561 -4.32 0.0061
2019-11-14 2019-09-30 13F TETRA TECH COM 88162G103 175,420 -172,734 -49.61 15,219 -44.33 0.0068
2019-08-14 2019-06-30 13F TETRA TECH COM 88162G103 348,154 -2,962 -0.84 27,337 30.63 0.0122
2019-05-15 2019-03-31 13F TETRA TECH COM 88162G103 351,116 21,237 6.44 20,927 22.53 0.0096
2019-02-14 2018-12-31 13F TETRA TECH COM 88162G103 329,879 -7,814 -2.31 17,079 -25.95 0.0085
2018-11-14 2018-09-30 13F TETRA TECH COM 88162G103 337,693 26,591 8.55 23,065 26.74 0.0081
2018-08-14 2018-06-30 13F TETRA TECH COM 88162G103 311,102 -30,515 -8.93 18,199 8.83 0.0081
2018-05-14 2018-03-31 13F TETRA TECH COM 88162G103 341,617 5,556 1.65 16,723 3.34 0.0076
2018-02-12 2017-12-31 13F TETRA TECH COM 88162G103 336,061 -14,085 -4.02 16,182 -0.72 0.0074
2017-11-07 2017-09-30 13F TETRA TECH COM 88162G103 350,146 -50,844 -12.68 16,300 -11.14 0.0078
2017-08-10 2017-06-30 13F TETRA TECH COM 88162G103 400,990 -26,381 -6.17 18,344 5.07 0.0092
2017-05-05 2017-03-31 13F TETRA TECH COM 88162G103 427,371 9,384 2.25 17,459 -3.20 0.0090
2017-02-03 2016-12-31 13F TETRA TECH COM 88162G103 417,987 -10,110 -2.36 18,036 18.78 0.0098
2016-11-08 2016-09-30 13F TETRA TECH COM 88162G103 428,097 -205,370 -32.42 15,184 -22.04 0.0085
2016-08-08 2016-06-30 13F TETRA TECH COM 88162G103 633,467 151,311 31.38 19,476 35.46 0.0114
2016-05-12 2016-03-31 13F TETRA TECH COM 88162G103 482,156 78,652 19.49 14,378 36.93 0.0086
2016-02-11 2015-12-31 13F TETRA TECH COM 88162G103 403,504 63,795 18.78 10,500 27.13 0.0062
2015-11-12 2015-09-30 13F TETRA TECH COM 88162G103 339,709 -1,740 -0.51 8,259 -5.65 0.0051
2015-08-13 2015-06-30 13F TETRA TECH COM 88162G103 341,449 463 0.14 8,754 6.87 0.0050
2015-05-14 2015-03-31 13F TETRA TECH COM 88162G103 340,986 7,147 2.14 8,191 -8.11 0.0047
2015-02-13 2014-12-31 13F TETRA TECH COM 88162G103 333,839 9,709 3.00 8,914 10.10 0.0052
2014-11-14 2014-09-30 13F TETRA TECH COM 88162G103 324,130 8,483 2.69 8,096 -6.72 0.0049
2014-08-13 2014-06-30 13F TETRA TECH COM 88162G103 315,647 9,392 3.07 8,679 -4.23 0.0051
2014-05-14 2014-03-31 13F TETRA TECH COM 88162G103 306,255 8,130 2.73 9,062 8.63 0.0054
2014-02-14 2013-12-31 13F TETRA TECH COM 88162G103 298,125 9,868 3.42 8,342 11.76 0.0051
2013-11-14 2013-09-30 13F TETRA TECH COM 88162G103 288,257 -335,593 -53.79 7,464 -49.11 0.0049
2013-08-14 2013-06-30 13F TETRA TECH COM 88162G103 623,850 623,850 14,667 0.0102
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.