利樂科技公司
US ˙ NasdaqGS ˙ US88162G1031

SecurityTTEK / Tetra Tech, Inc.
InstitutionAviva Plc
Latest Disclosed Ownership1,926,795 shares
Latest Disclosed Value $ 58,035,065
Aviva Plc reports 5.52% decrease in ownership of TTEK / Tetra Tech, Inc.

On May 14, 2026 - Aviva Plc filed a 13F-HR form disclosing ownership of 1,926,795 shares of Tetra Tech, Inc. (US:TTEK) valued at $58,035,065 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 2,039,264 shares of Tetra Tech, Inc.. This represents a change in shares of -5.52% during the quarter. The current value of the position is $53,892,456 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 INC COM 88162G103 1,926,795 -112,469 -5.52 58,035 -15.15 0.0974
2026-02-12 2025-12-31 13F TETRA TECH INC COM 88162G103 2,039,264 95,029 4.89 68,397 5.39 0.1153
2025-11-13 2025-09-30 13F TETRA TECH INC COM 88162G103 1,944,235 951,724 95.89 64,899 81.84 0.1179
2025-08-07 2025-06-30 13F TETRA TECH INC COM 88162G103 992,511 168,397 20.43 35,691 48.06 0.0737
2025-05-15 2025-03-31 13F TETRA TECH INC COM 88162G103 824,114 376 0.05 24,105 -26.55 0.0582
2025-02-13 2024-12-31 13F TETRA TECH INC COM 88162G103 823,738 260,913 46.36 32,818 23.64 0.0852
2024-11-14 2024-09-30 13F TETRA TECH INC COM 88162G103 562,825 450,232 399.88 26,543 15.28 0.0688
2024-08-02 2024-06-30 13F TETRA TECH INC COM 88162G103 112,593 108,134 2,425.07 23,023 2,697.45 0.0638
2024-05-14 2024-03-31 13F TETRA TECH INC COM 88162G103 4,459 0 0.00 824 10.62 0.0027
2024-02-09 2023-12-31 13F TETRA TECH INC COM 88162G103 4,459 -3,835 -46.24 744 -40.95 0.0027
2023-11-13 2023-09-30 13F TETRA TECH INC COM 88162G103 8,294 -5,400 -39.43 1,261 -43.80 0.0053
2023-08-10 2023-06-30 13F TETRA TECH INC COM 88162G103 13,694 -7 -0.05 2,242 11.43 0.0091
2023-05-12 2023-03-31 13F TETRA TECH INC COM 88162G103 13,701 3,619 35.90 2,013 37.53 0.0091
2023-02-14 2022-12-31 13F/A-2 TETRA TECH INC COM 88162G103 10,082 -4,680 -31.70 1,464 -22.88 0.0072
2023-02-10 2022-12-31 13F/A-1 TETRA TECH INC COM 88162G103 10,082 -4,680 996 0.0048
2023-02-09 2022-12-31 13F TETRA TECH INC COM 88162G103 10,082 -4,680 1 0.0070
2022-11-14 2022-09-30 13F TETRA TECH INC COM 88162G103 14,762 -3,969 -21.19 1,897 -25.84 0.0109
2022-08-04 2022-06-30 13F TETRA TECH INC COM 88162G103 18,731 1,679 9.85 2,558 -9.07 0.0136
2022-05-13 2022-03-31 13F TETRA TECH INC COM 88162G103 17,052 -557 -3.16 2,813 -5.92 0.0141
2022-02-10 2021-12-31 13F TETRA TECH INC COM 88162G103 17,609 6,125 53.34 2,990 74.34 0.0125
2021-11-12 2021-09-30 13F TETRA TECH INC COM 88162G103 11,484 11,484 1,715 0.0076
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.