利樂科技公司
MX ˙ BMV ˙ US88162G1031
SecurityMX:TTEK / Tetra Tech, Inc.
InstitutionState Street Corp
Latest Disclosed Ownership9,635,912 shares
Latest Disclosed Value $ 290,233,669
State Street Corp reports 2.25% increase in ownership of TTEK / Tetra Tech, Inc.

On May 15, 2026 - State Street Corp filed a 13F-HR form disclosing ownership of 9,635,912 shares of Tetra Tech, Inc. (MX:TTEK) valued at $290,233,669 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 9,424,246 shares of Tetra Tech, Inc.. This represents a change in shares of 2.25% 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 INC COM 88162G103 9,635,912 211,666 2.25 290,234 -8.18 0.0100
2026-02-13 2025-12-31 13F TETRA TECH INC COM 88162G103 9,424,246 -1,868,482 -16.55 316,089 -16.15 0.0106
2025-11-14 2025-09-30 13F TETRA TECH INC COM 88162G103 11,292,728 -649,011 -5.43 376,951 -12.22 0.0131
2025-08-14 2025-06-30 13F TETRA TECH INC COM 88162G103 11,941,739 1,262,811 11.83 429,425 37.48 0.0161
2025-05-15 2025-03-31 13F TETRA TECH INC COM 88162G103 10,678,928 1,421,002 15.35 312,359 -15.31 0.0129
2025-02-14 2024-12-31 13F TETRA TECH INC COM 88162G103 9,257,926 488,024 5.56 368,836 -10.82 0.0146
2024-11-14 2024-09-30 13F TETRA TECH INC COM 88162G103 8,769,902 7,030,804 404.28 413,589 16.30 0.0168
2024-08-14 2024-06-30 13F TETRA TECH INC COM 88162G103 1,739,098 -27,306 -1.55 355,611 8.99 0.0155
2024-05-15 2024-03-31 13F TETRA TECH INC COM 88162G103 1,766,404 235,648 15.39 326,272 27.68 0.0146
2024-02-14 2023-12-31 13F TETRA TECH INC COM 88162G103 1,530,756 47,665 3.21 255,529 13.33 0.0124
2023-11-14 2023-09-30 13F TETRA TECH INC COM 88162G103 1,483,091 3,501 0.24 225,474 -6.93 0.0125
2023-08-14 2023-06-30 13F TETRA TECH INC COM 88162G103 1,479,590 -17,349 -1.16 242,268 10.16 0.0127
2023-05-15 2023-03-31 13F TETRA TECH INC COM 88162G103 1,496,939 30,500 2.08 219,915 3.29 0.0124
2023-05-15 2022-12-31 13F/A-99 TETRA TECH INC COM 88162G103 1,466,439 25,295 1.76 212,912 14.94 0.0125
2023-05-15 2022-12-31 13F TETRA TECH INC COM 88162G103 1,466,439 25,295 212,912 0.0125
2022-11-15 2022-09-30 13F TETRA TECH INC COM 88162G103 1,441,144 8,065 0.56 185,230 -5.34 0.0117
2022-08-15 2022-06-30 13F TETRA TECH INC COM 88162G103 1,433,079 -274,117 -16.06 195,687 -30.51 0.0117
2022-05-16 2022-03-31 13F TETRA TECH INC COM 88162G103 1,707,196 31,942 1.91 281,585 -1.01 0.0139
2022-02-14 2021-12-31 13F TETRA TECH INC COM 88162G103 1,675,254 11,211 0.67 284,458 14.47 0.0135
2021-11-15 2021-09-30 13F TETRA TECH INC COM 88162G103 1,664,043 -10,244 -0.61 248,508 21.62 0.0131
2021-08-16 2021-06-30 13F TETRA TECH INC COM 88162G103 1,674,287 10,222 0.61 204,330 -9.53 0.0108
2021-07-09 2021-03-31 13F/A-1 TETRA TECH INC COM 88162G103 1,664,065 -9,780 -0.58 225,847 16.54 0.0129
2021-05-17 2021-03-31 13F TETRA TECH INC COM 88162G103 1,664,065 -9,780 225,847 0.0130
2021-02-16 2020-12-31 13F TETRA TECH INC COM 88162G103 1,673,845 19,804 1.20 193,798 22.69 0.0119
2020-11-10 2020-09-30 13F TETRA TECH INC COM 88162G103 1,654,041 -105,297 -5.99 157,961 13.48 0.0108
2020-08-14 2020-06-30 13F TETRA TECH INC COM 88162G103 1,759,338 20,093 1.16 139,199 13.33 0.0101
2020-06-19 2020-03-31 13F/A-1 TETRA TECH INC COM 88162G103 1,739,245 1,703 0.10 122,825 -17.96 0.0107
2020-05-11 2020-03-31 13F TETRA TECH INC COM 88162G103 1,739,245 1,703 122,825 10,786.5081
2020-02-06 2019-12-31 13F TETRA TECH INC COM 88162G103 1,737,542 -3,387 -0.19 149,707 -0.88 0.0103
2019-11-14 2019-09-30 13F TETRA TECH INC COM 88162G103 1,740,929 120,840 7.46 151,043 18.69 0.0113
2019-08-14 2019-06-30 13F TETRA TECH INC COM 88162G103 1,620,089 25,307 1.59 127,258 33.91 0.0095
2019-05-15 2019-03-31 13F TETRA TECH INC COM 88162G103 1,594,782 8,299 0.52 95,033 15.71 0.0074
2019-02-12 2018-12-31 13F TETRA TECH INC COM 88162G103 1,586,483 -21,063 -1.31 82,132 -25.20 0.0075
2018-11-09 2018-09-30 13F TETRA TECH Common equity shares 88162G103 1,607,546 76,651 5.01 109,796 22.60 0.0084
2018-08-14 2018-06-30 13F TETRA TECH Common equity shares 88162G103 1,530,895 65,044 4.44 89,554 24.81 0.0075
2018-05-15 2018-03-31 13F TETRA TECH Common equity shares 88162G103 1,465,851 -1,593 -0.11 71,753 1.55 0.0061
2018-02-14 2017-12-31 13F TETRA TECH Common equity shares 88162G103 1,467,444 26,765 1.86 70,656 5.35 0.0057
2017-11-14 2017-09-30 13F TETRA TECH Common equity shares 88162G103 1,440,679 -61,858 -4.12 67,067 -2.44 0.0058
2017-08-14 2017-06-30 13F TETRA TECH Common equity shares 88162G103 1,502,537 74,476 5.22 68,741 17.83 0.0061
2017-05-15 2017-03-31 13F TETRA TECH Common equity shares 88162G103 1,428,061 90,381 6.76 58,339 1.07 0.0052
2017-02-09 2016-12-31 13F TETRA TECH Common equity shares 88162G103 1,337,680 87,650 7.01 57,724 30.18 0.0054
2017-01-13 2016-09-30 13F/A-1 TETRA TECH Common equity shares 88162G103 1,250,030 16,724 1.36 44,340 16.95 0.0045
2016-11-14 2016-09-30 13F TETRA TECH Common equity shares 88162G103 1,250,030 44,340
2016-08-12 2016-06-30 13F TETRA TECH Common equity shares 88162G103 1,233,306 -592 -0.05 37,913 3.03 0.0041
2016-05-20 2016-03-31 13F/A-1 TETRA TECH Common equity shares 88162G103 1,233,898 -36,099 -2.84 36,797 11.36 0.0040
2016-05-12 2016-03-31 13F TETRA TECH Common equity shares 88162G103 1,233,898 36,797
2016-02-16 2015-12-31 13F TETRA TECH Common equity shares 88162G103 1,269,997 17,858 1.43 33,043 8.56 0.0036
2015-11-16 2015-09-30 13F TETRA TECH Common equity shares 88162G103 1,252,139 -69,146 -5.23 30,438 -10.16 0.0035
2015-08-13 2015-06-30 13F TETRA TECH Common equity shares 88162G103 1,321,285 -82,599 -5.88 33,880 0.48 0.0036
2015-05-15 2015-03-31 13F TETRA TECH Common equity shares 88162G103 1,403,884 15,597 1.12 33,717 -9.05 0.0035
2015-02-11 2014-12-31 13F TETRA TECH Common equity shares 88162G103 1,388,287 20,428 1.49 37,071 8.51 0.0037
2014-11-12 2014-09-30 13F/A-1 TETRA TECH Common equity shares 88162G103 1,367,859 -61,955 -4.33 34,163 -13.12 0.0037
2014-11-10 2014-09-30 13F TETRA TECH Common equity shares 88162G103 1,367,859 34,163
2014-08-12 2014-06-30 13F TETRA TECH Common equity shares 88162G103 1,429,814 -10,895 -0.76 39,322 -7.77 0.0042
2014-05-15 2014-03-31 13F/A-1 TETRA TECH Common equity shares 88162G103 1,440,709 20,440 1.44 42,634 7.28 0.0048
2014-05-13 2014-03-31 13F TETRA TECH Common equity shares 88162G103 1,441,976 42,671
2014-02-06 2013-12-31 13F/A-1 TETRA TECH Common equity shares 88162G103 1,420,269 -7,108 -0.50 39,742 7.54 0.0044
2014-02-06 2013-12-31 13F TETRA TECH Common equity shares 88162G103 1,268,043 33,540
2013-11-12 2013-09-30 13F TETRA TECH Common equity shares 88162G103 1,427,377 -15,150 -1.05 36,957 8.98 0.0046
2013-08-08 2013-06-30 13F TETRA TECH Common equity shares 88162G103 1,442,527 1,442,527 33,911 0.0044
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.