Tetra Tech, Inc.
US ˙ NasdaqGS ˙ US88162G1031

SecurityTTEK / Tetra Tech, Inc.
InstitutionBowen Hanes & Co Inc
Latest Disclosed Ownership15,975 shares
Latest Disclosed Value $ 481,167
Bowen Hanes & Co Inc ownership in TTEK / Tetra Tech, Inc.

On May 14, 2026 - Bowen Hanes & Co Inc filed a 13F-HR form disclosing ownership of 15,975 shares of Tetra Tech, Inc. (US:TTEK) valued at $481,167 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 15,975 shares of Tetra Tech, Inc.. The current value of the position is $446,821 USD.

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)
2026-05-14 2026-03-31 13F TETRA TECH COM 88162G103 15,975 0 0.00 481 0.0117
2026-02-10 2025-12-31 13F TETRA TECH COM 88162G103 15,975 -721,450 -97.83 1 -100.00 0.0134
2025-11-10 2025-09-30 13F TETRA TECH COM 88162G103 737,425 -1,098,965 -59.84 24,615 -62.72 0.6163
2025-08-12 2025-06-30 13F TETRA TECH COM 88162G103 1,836,390 -19,285 -1.04 66,037 21.66 1.6662
2025-05-14 2025-03-31 13F TETRA TECH COM 88162G103 1,855,675 -170,195 -8.40 54,278 -32.75 1.5099
2025-02-10 2024-12-31 13F TETRA TECH COM 88162G103 2,025,870 11,145 0.55 80,711 -15.05 2.1641
2024-11-12 2024-09-30 13F TETRA TECH COM 88162G103 2,014,725 1,610,955 398.98 95,014 15.08 2.4930
2024-08-12 2024-06-30 13F TETRA TECH COM 88162G103 403,770 -115 -0.03 82,563 111,470.27 2.2868
2024-05-13 2024-03-31 13F TETRA TECH COM 88162G103 403,885 6,830 1.72 75 -99.89 2.1310
2024-02-12 2023-12-31 13F TETRA TECH COM 88162G103 397,055 17,590 4.64 66,280 14.89 1.9984
2023-11-13 2023-09-30 13F TETRA TECH COM 88162G103 379,465 -340 -0.09 57,690 -7.23 1.9414
2023-08-14 2023-06-30 13F TETRA TECH COM 88162G103 379,805 -740 -0.19 62,189 11.24 1.9919
2023-05-12 2023-03-31 13F TETRA TECH COM 88162G103 380,545 270 0.07 55,906 1.26 1.9211
2023-02-09 2022-12-31 13F TETRA TECH COM 88162G103 380,275 -40 -0.01 55,212 12.95 1.9579
2022-11-14 2022-09-30 13F TETRA TECH COM 88162G103 380,315 -575 -0.15 48,882 -6.02 1.8902
2022-08-12 2022-06-30 13F TETRA TECH COM 88162G103 380,890 170 0.04 52,011 -17.17 1.8861
2022-05-12 2022-03-31 13F TETRA TECH COM 88162G103 380,720 -4,985 -1.29 62,796 -4.12 1.8730
2022-02-11 2021-12-31 13F TETRA TECH COM 88162G103 385,705 -29,770 -7.17 65,493 5.55 1.8477
2021-11-15 2021-09-30 13F TETRA TECH COM 88162G103 415,475 -2,165 -0.52 62,047 21.73 1.9055
2021-08-12 2021-06-30 13F TETRA TECH COM 88162G103 417,640 -10,000 -2.34 50,969 -12.18 1.5497
2021-05-18 2021-03-31 13F/A-1 TETRA TECH COM 88162G103 427,640 -15,110 -3.41 58,039 13.22 1.8548
2021-05-13 2021-03-31 13F TETRA TECH COM 88162G103 427,640 -15,110 58,039 1.9576
2021-02-08 2020-12-31 13F TETRA TECH COM 88162G103 442,750 -24,100 -5.16 51,262 14.98 1.7043
2021-02-08 2020-09-30 13F/A-1 TETRA TECH COM 88162G103 466,850 300 0.06 44,584 20.78 1.6083
2020-11-02 2020-09-30 13F TETRA TECH COM 88162G103 466,850 300 44,584 1,680,968.8268
2021-02-08 2020-06-30 13F/A-1 TETRA TECH COM 88162G103 466,550 52,900 12.79 36,913 26.36 1.4879
2020-08-14 2020-06-30 13F TETRA TECH COM 88162G103 466,550 52,900 36,913 1,553,622.5589
2021-02-08 2020-03-31 13F/A-1 TETRA TECH COM 88162G103 413,650 0 0.00 29,212 -18.04 1.4303
2020-05-14 2020-03-31 13F TETRA TECH COM 88162G103 413,650 0 29,212 1,467,428.6794
2020-02-13 2019-12-31 13F TETRA TECH COM 88162G103 413,650 -20,200 -4.66 35,640 -5.32 1.4669
2019-11-13 2019-09-30 13F TETRA TECH COM 88162G103 433,850 -60,000 -12.15 37,641 -2.97 1.5998
2019-08-13 2019-06-30 13F TETRA TECH COM 88162G103 493,850 -10,000 -1.98 38,792 29.20 1.6685
2019-05-13 2019-03-31 13F TETRA TECH COM 88162G103 503,850 -31,515 -5.89 30,024 8.33 1.3290
2019-02-13 2018-12-31 13F TETRA TECH COM 88162G103 535,365 -44,505 -7.67 27,716 -30.02 1.3951
2018-11-07 2018-09-30 13F TETRA TECH COM 88162G103 579,870 -4,700 -0.80 39,605 15.81 1.7438
2018-08-14 2018-06-30 13F TETRA TECH COM 88162G103 584,570 -11,800 -1.98 34,197 17.15 1.5979
2018-05-15 2018-03-31 13F TETRA TECH COM 88162G103 596,370 -835 -0.14 29,192 1.52 1.3526
2018-02-13 2017-12-31 13F TETRA TECH COM 88162G103 597,205 1,100 0.18 28,755 3.63 1.2833
2017-11-13 2017-09-30 13F TETRA TECH COM 88162G103 596,105 5,350 0.91 27,749 2.67 1.3052
2017-07-31 2017-06-30 13F TETRA TECH COM 88162G103 590,755 -1,600 -0.27 27,027 11.69 1.3242
2017-05-15 2017-03-31 13F TETRA TECH COM 88162G103 592,355 -4,610 -0.77 24,198 -6.06 1.2143
2017-02-14 2016-12-31 13F TETRA TECH COM 88162G103 596,965 -3,180 -0.53 25,759 21.01 1.3826
2016-11-14 2016-09-30 13F TETRA TECH COM 88162G103 600,145 -14,400 -2.34 21,287 12.67 1.1279
2016-08-12 2016-06-30 13F TETRA TECH COM 88162G103 614,545 614,545 18,894 1.0221
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.