Tetra Tech, Inc.
US ˙ NasdaqGS ˙ US88162G1031

SecurityTTEK / Tetra Tech, Inc.
InstitutionMan Group plc
Latest Disclosed Ownership217,545 shares
Latest Disclosed Value $ 6,552,455
Man Group plc reports 42.64% decrease in ownership of TTEK / Tetra Tech, Inc.

On May 15, 2026 - Man Group plc filed a 13F-HR form disclosing ownership of 217,545 shares of Tetra Tech, Inc. (US:TTEK) valued at $6,552,455 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 379,293 shares of Tetra Tech, Inc.. This represents a change in shares of -42.64% during the quarter. The current value of the position is $6,047,751 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)
2026-05-15 2026-03-31 13F TETRA TECH INC COM 88162G103 217,545 -161,748 -42.64 6,552 -48.49 0.0119
2026-02-17 2025-12-31 13F TETRA TECH INC COM 88162G103 379,293 358,066 1,686.84 12,721 1,696.75 0.0216
2025-11-14 2025-09-30 13F TETRA TECH INC COM 88162G103 21,227 -38,169 -64.26 709 -66.84 0.0012
2025-08-14 2025-06-30 13F TETRA TECH INC COM 88162G103 59,396 -447,766 -88.29 2,136 -85.61 0.0041
2025-05-15 2025-03-31 13F TETRA TECH INC COM 88162G103 507,162 -79,253 -13.51 14,834 -36.50 0.0376
2025-02-14 2024-12-31 13F TETRA TECH INC COM 88162G103 586,415 463,723 377.96 23,363 303.77 0.0615
2024-11-14 2024-09-30 13F TETRA TECH INC COM 88162G103 122,692 68,347 125.77 5,786 -47.93 0.0151
2024-08-14 2024-06-30 13F TETRA TECH INC COM 88162G103 54,345 -45,937 -45.81 11,112 -40.01 0.0281
2024-05-15 2024-03-31 13F TETRA TECH INC COM 88162G103 100,282 21,105 26.66 18,523 40.15 0.0467
2024-02-14 2023-12-31 13F TETRA TECH INC COM 88162G103 79,177 13,217 70.17 0.0368
2023-11-14 2023-09-30 13F TETRA TECH INC COM 88162G103 7,768 85.46 0.0241
2023-08-14 2023-06-30 13F TETRA TECH INC COM 88162G103 25,581 4,189 -74.17 0.0129
2023-05-15 2023-03-31 13F TETRA TECH INC COM 88162G103 16,213 -7.12 0.0577
2023-02-14 2022-12-31 13F TETRA TECH INC COM 88162G103 120,217 5,852 5.12 17,454 18.74 0.0626
2022-11-14 2022-09-30 13F TETRA TECH INC COM 88162G103 114,365 14,699 45.36 0.0682
2022-08-15 2022-06-30 13F TETRA TECH INC COM 88162G103 10,112 20.80 0.0429
2022-05-16 2022-03-31 13F TETRA TECH INC COM 88162G103 50,752 14,012 38.14 8,371 34.19 0.0291
2022-02-14 2021-12-31 13F TETRA TECH INC COM 88162G103 36,740 2,810 8.28 6,238 23.11 0.0201
2021-11-15 2021-09-30 13F TETRA TECH INC COM 88162G103 33,930 3,342 10.93 5,067 35.74 0.0178
2021-08-16 2021-06-30 13F TETRA TECH INC COM 88162G103 30,588 23,544 334.24 3,733 290.48 0.0131
2021-05-17 2021-03-31 13F TETRA TECH INC COM 88162G103 7,044 -558 -7.34 956 8.64 0.0042
2021-02-16 2020-12-31 13F TETRA TECH INC COM 88162G103 7,602 -77,307 -91.05 880 -89.15 0.0039
2020-11-16 2020-09-30 13F TETRA TECH INC COM 88162G103 84,909 -5,129 -5.70 8,109 13.83 0.0319
2020-08-14 2020-06-30 13F TETRA TECH INC COM 88162G103 90,038 10,976 13.88 7,124 27.60 0.0359
2020-05-15 2020-03-31 13F TETRA TECH INC COM 88162G103 79,062 -70,676 -47.20 5,583 -56.72 0.0362
2020-02-18 2019-12-31 13F TETRA TECH INC COM 88162G103 149,738 -55,849 -27.17 12,901 -27.67 0.0424
2019-11-14 2019-09-30 13F TETRA TECH INC COM 88162G103 205,587 -77,134 -27.28 17,837 -19.68 0.0663
2019-08-14 2019-06-30 13F TETRA TECH INC COM 88162G103 282,721 117,952 71.59 22,208 126.17 0.0803
2019-05-15 2019-03-31 13F TETRA TECH INC COM 88162G103 164,769 29,529 21.83 9,819 40.25 0.0373
2019-02-14 2018-12-31 13F TETRA TECH INC COM 88162G103 135,240 42 0.03 7,001 -24.18 0.0311
2018-11-14 2018-09-30 13F TETRA TECH INC COM 88162G103 135,198 39,174 40.80 9,234 64.39 0.0337
2018-08-14 2018-06-30 13F TETRA TECH INC COM 88162G103 96,024 10,440 12.20 5,617 34.09 0.0231
2018-05-15 2018-03-31 13F TETRA TECH INC COM 88162G103 85,584 85,584 4,189 0.0192
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.