Tetra Tech, Inc.
US ˙ NasdaqGS ˙ US88162G1031

SecurityTTEK / Tetra Tech, Inc.
InstitutionQuantbot Technologies LP
Latest Disclosed Ownership29,413 shares
Latest Disclosed Value $ 885,920
Quantbot Technologies LP reports 791.30% increase in ownership of TTEK / Tetra Tech, Inc.

On May 13, 2026 - Quantbot Technologies LP filed a 13F-HR form disclosing ownership of 29,413 shares of Tetra Tech, Inc. (US:TTEK) valued at $885,920 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 3,300 shares of Tetra Tech, Inc.. This represents a change in shares of 791.30% during the quarter. The current value of the position is $817,681 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)
2026-05-13 2026-03-31 13F TETRA TECH COM 88162G103 29,413 26,113 791.30 886 704.55 0.0362
2026-02-10 2025-12-31 13F TETRA TECH COM 88162G103 3,300 -39,486 -92.29 111 -92.30 0.0037
2025-11-12 2025-09-30 13F TETRA TECH COM 88162G103 42,786 38,767 964.59 1,428 891.67 0.0389
2025-08-13 2025-06-30 13F TETRA TECH COM 88162G103 4,019 -74,390 -94.87 145 -93.72 0.0037
2025-05-13 2025-03-31 13F TETRA TECH COM 88162G103 78,409 37,767 92.93 2,293 41.63 0.0730
2025-02-11 2024-12-31 13F TETRA TECH COM 88162G103 40,642 40,642 1,619 0.0592
2024-11-13 2024-09-30 13F TETRA TECH COM 88162G103 0 -18,774 -100.00 0 -100.00
2024-08-09 2024-06-30 13F TETRA TECH COM 88162G103 18,774 15,972 570.02 3,839 642.36 0.1858
2024-05-06 2024-03-31 13F TETRA TECH COM 88162G103 2,802 -13,058 -82.33 518 -80.47 0.0292
2024-02-14 2023-12-31 13F TETRA TECH COM 88162G103 15,860 14,510 1,074.81 2,648 1,191.22 0.1537
2023-11-07 2023-09-30 13F TETRA TECH COM 88162G103 1,350 1,350 205 0.0138
2023-05-12 2023-03-31 13F TETRA TECH COM 88162G103 0 -8,687 -100.00 0 -100.00
2023-02-13 2022-12-31 13F TETRA TECH COM 88162G103 8,687 2,993 52.56 1,261 72.50 0.0905
2022-11-07 2022-09-30 13F TETRA TECH COM 88162G103 5,694 5,403 1,856.70 731 1,774.36 0.0552
2022-08-09 2022-06-30 13F TETRA TECH COM 88162G103 291 291 39 0.0036
2021-11-09 2021-09-30 13F TETRA TECH COM 88162G103 0 -6,380 -100.00 0 -100.00
2021-08-12 2021-06-30 13F TETRA TECH COM 88162G103 6,380 6,380 778 0.0612
2021-05-14 2021-03-31 13F TETRA TECH COM 88162G103 0 -4,993 -100.00 0 -100.00
2021-02-12 2020-12-31 13F TETRA TECH COM 88162G103 4,993 4,993 578 0.0601
2019-05-13 2019-03-31 13F TETRA TECH COM 88162G103 0 -32,100 -100.00 0 -100.00
2019-02-13 2018-12-31 13F TETRA TECH COM 88162G103 32,100 31,792 10,322.08 1,661 7,809.52 0.1626
2018-11-13 2018-09-30 13F TETRA TECH COM 88162G103 308 -22,603 -98.66 21 -97.75 0.0015
2017-05-10 2017-03-31 13F TETRA TECH COM 88162G103 22,911 16,724 270.31 935 251.50 0.0980
2017-02-09 2016-12-31 13F TETRA TECH COM 88162G103 6,187 5,515 820.68 266 1,056.52 0.0295
2016-10-31 2016-09-30 13F TETRA TECH COM 88162G103 672 370 122.52 23 155.56 0.0026
2016-08-02 2016-06-30 13F TETRA TECH COM 88162G103 302 302 -55.06 9 -60.87 0.0010
2016-04-28 2016-03-31 13F TETRA TECH COM 88162G103 0 0 0 0.0000
2015-07-27 2015-06-30 13F TETRA TECH COM 88162G103 0 -14,791 -100.00 0 -100.00
2015-04-24 2015-03-31 13F TETRA TECH COM 88162G103 14,791 14,791 0.00 355 0.0879
2014-10-15 2014-09-30 13F TETRA TECH COM 88162G103 0 -2,500 -100.00 0 -100.00
2014-07-08 2014-06-30 13F TETRA TECH COM 88162G103 2,500 -3,400 -57.63 68 -60.92 0.0107
2014-05-21 2014-03-31 13F TETRA TECH COM 88162G103 5,900 2,300 63.89 174 74.00 0.0410
2014-01-31 2013-12-31 13F TETRA TECH COM 88162G103 3,600 3,600 100 0.0489
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.