Tetra Tech, Inc.
MX ˙ BMV ˙ US88162G1031
SecurityMX:TTEK / Tetra Tech, Inc.
InstitutionGeode Capital Management, Llc
Latest Disclosed Ownership5,217,448 shares
Latest Disclosed Value $ 157,185,669
Geode Capital Management, Llc reports 2.66% increase in ownership of TTEK / Tetra Tech, Inc.

On May 15, 2026 - Geode Capital Management, Llc filed a 13F-HR form disclosing ownership of 5,217,448 shares of Tetra Tech, Inc. (MX:TTEK) valued at $157,185,669 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 5,082,342 shares of Tetra Tech, Inc.. This represents a change in shares of 2.66% 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 5,217,448 135,106 2.66 157,186 -7.81 0.0052
2026-02-09 2025-12-31 13F TETRA TECH COM 88162G103 5,082,342 52,375 1.04 170,496 1.53 0.0056
2025-11-12 2025-09-30 13F TETRA TECH COM 88162G103 5,029,967 68,006 1.37 167,930 -5.90 0.0107
2025-08-08 2025-06-30 13F TETRA TECH COM 88162G103 4,961,961 -28,070 -0.56 178,460 22.23 0.0125
2025-05-13 2025-03-31 13F TETRA TECH COM 88162G103 4,990,031 260,335 5.50 146,001 -22.54 0.0115
2025-02-12 2024-12-31 13F TETRA TECH COM 88162G103 4,729,696 13,616 0.29 188,487 -15.27 0.0146
2024-11-12 2024-09-30 13F TETRA TECH COM 88162G103 4,716,080 3,785,189 406.62 222,466 16.84 0.0180
2024-08-09 2024-06-30 13F TETRA TECH COM 88162G103 930,891 23,980 2.64 190,398 13.64 0.0167
2024-05-13 2024-03-31 13F TETRA TECH COM 88162G103 906,911 39,909 4.60 167,548 15.75 0.0155
2024-02-13 2023-12-31 13F TETRA TECH COM 88162G103 867,002 27,647 3.29 144,751 13.42 0.0151
2023-11-13 2023-09-30 13F TETRA TECH COM 88162G103 839,355 16,387 1.99 127,628 -5.29 0.0152
2023-08-11 2023-06-30 13F TETRA TECH COM 88162G103 822,968 -44,384 -5.12 134,753 5.75 0.0158
2023-05-15 2023-03-31 13F TETRA TECH COM 88162G103 867,352 -3,838 -0.44 127,423 101,028.57 0.0165
2023-02-13 2022-12-31 13F TETRA TECH COM 88162G103 871,190 10,193 1.18 126 -99.89 0.0178
2022-11-14 2022-09-30 13F TETRA TECH COM 88162G103 860,997 16,624 1.97 110,663 -4.02 0.0168
2022-08-12 2022-06-30 13F TETRA TECH COM 88162G103 844,373 -198,745 -19.05 115,299 -32.99 0.0169
2022-05-13 2022-03-31 13F TETRA TECH COM 88162G103 1,043,118 48,896 4.92 172,051 1.92 0.0215
2022-02-11 2021-12-31 13F TETRA TECH COM 88162G103 994,222 5,542 0.56 168,818 14.34 0.0203
2021-11-12 2021-09-30 13F TETRA TECH COM 88162G103 988,680 -21,359 -2.11 147,649 19.78 0.0199
2021-08-13 2021-06-30 13F TETRA TECH COM 88162G103 1,010,039 27,414 2.79 123,265 -7.57 0.0170
2021-05-12 2021-03-31 13F TETRA TECH COM 88162G103 982,625 128,217 15.01 133,361 34.81 0.0204
2021-02-12 2020-12-31 13F TETRA TECH COM 88162G103 854,408 37,210 4.55 98,923 26.76 0.0166
2020-11-13 2020-09-30 13F TETRA TECH COM 88162G103 817,198 -15,756 -1.89 78,042 18.42 0.0153
2020-08-13 2020-06-30 13F TETRA TECH COM 88162G103 832,954 -3,084 -0.37 65,903 11.62 0.0141
2020-05-14 2020-03-31 13F TETRA TECH COM 88162G103 836,038 54,314 6.95 59,041 -12.34 0.0154
2020-02-20 2019-12-31 13F/A-1 TETRA TECH COM 88162G103 781,724 18,686 2.45 67,353 1.74 0.0141
2020-02-13 2019-12-31 13F TETRA TECH COM 88162G103 781,724 18,686 67,353 8,583.5493
2019-11-12 2019-09-30 13F TETRA TECH COM 88162G103 763,038 -43,014 -5.34 66,201 4.56 0.0154
2019-08-14 2019-06-30 13F TETRA TECH COM 88162G103 806,052 50,453 6.68 63,315 40.62 0.0153
2019-05-14 2019-03-31 13F TETRA TECH COM 88162G103 755,599 75,020 11.02 45,026 27.79 0.0117
2019-03-06 2018-12-31 13F/A-1 TETRA TECH COM 88162G103 680,579 79,944 13.31 35,233 -14.11 0.0109
2019-02-13 2018-12-31 13F TETRA TECH COM 88162G103 680,579 79,944 35,233
2018-11-13 2018-09-30 13F TETRA TECH COM 88162G103 600,635 50,900 9.26 41,023 27.56 0.0116
2018-08-14 2018-06-30 13F TETRA TECH COM 88162G103 549,735 38,140 7.46 32,159 28.42 0.0099
2018-05-15 2018-03-31 13F TETRA TECH COM 88162G103 511,595 9,510 1.89 25,042 3.59 0.0082
2018-02-13 2017-12-31 13F TETRA TECH COM 88162G103 502,085 -12,502 -2.43 24,174 0.92 0.0082
2017-11-14 2017-09-30 13F TETRA TECH COM 88162G103 514,587 20,980 4.25 23,954 6.08 0.0088
2017-08-14 2017-06-30 13F TETRA TECH COM 88162G103 493,607 18,435 3.88 22,582 16.34 0.0089
2017-06-21 2017-03-31 13F/A-1 TETRA TECH INC NEW COM COM 88162G103 475,172 44,512 10.34 19,410 4.46 0.0080
2017-05-12 2017-03-31 13F TETRA TECH INC NEW COM COM 88162G103 475,172 19,410
2017-02-14 2016-12-31 13F TETRA TECH INC NEW COM COM 88162G103 430,660 20,928 5.11 18,582 27.86 0.0086
2016-11-10 2016-09-30 13F TETRA TECH INC NEW COM COM 88162G103 409,732 4,474 1.10 14,533 16.65 0.0073
2016-08-12 2016-06-30 13F TETRA TECH INC NEW COM COM 88162G103 405,258 -12,919 -3.09 12,459 -0.09 0.0068
2016-05-13 2016-03-31 13F TETRA TECH INC NEW COM COM 88162G103 418,177 22,538 5.70 12,470 21.14 0.0066
2016-02-12 2015-12-31 13F TETRA TECH INC NEW COM COM 88162G103 395,639 -449 -0.11 10,294 6.92 0.0059
2015-11-13 2015-09-30 13F TETRA TECH INC NEW COM COM 88162G103 396,088 4,326 1.10 9,628 -4.14 0.0058
2015-08-14 2015-06-30 13F TETRA TECH INC NEW COM COM 88162G103 391,762 3,752 0.97 10,044 7.77 0.0057
2015-05-14 2015-03-31 13F TETRA TECH INC NEW COM COM 88162G103 388,010 12,188 3.24 9,320 -7.12 0.0053
2015-02-12 2014-12-31 13F TETRA TECH INC NEW COM COM 88162G103 375,822 5,222 1.41 10,034 8.39 0.0060
2014-11-14 2014-09-30 13F TETRA TECH INC NEW COM COM 88162G103 370,600 1,971 0.53 9,257 -8.68 0.0060
2014-08-13 2014-06-30 13F TETRA TECH INC NEW COM COM 88162G103 368,629 18,634 5.32 10,137 -2.11 0.0066
2014-05-14 2014-03-31 13F TETRA TECH INC NEW COM COM 88162G103 349,995 25,717 7.93 10,356 14.14 0.0069
2014-02-14 2013-12-31 13F TETRA TECH INC NEW COM COM 88162G103 324,278 20,574 6.77 9,073 15.39 0.0063
2013-11-14 2013-09-30 13F TETRA TECH INC NEW COM COM 88162G103 303,704 18,426 6.46 7,863 17.24 0.0063
2013-08-14 2013-06-30 13F TETRA TECH INC NEW COM COM 88162G103 285,278 285,278 6,707 0.0059
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.