Tetra Tech, Inc.
US ˙ NasdaqGS ˙ US88162G1031

SecurityTTEK / Tetra Tech, Inc.
InstitutionAlps Advisors Inc
Latest Disclosed Ownership40,571 shares
Latest Disclosed Value $ 1,221,999
Alps Advisors Inc reports 23.73% increase in ownership of TTEK / Tetra Tech, Inc.

On May 8, 2026 - Alps Advisors Inc filed a 13F-HR form disclosing ownership of 40,571 shares of Tetra Tech, Inc. (US:TTEK) valued at $1,221,999 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 32,791 shares of Tetra Tech, Inc.. This represents a change in shares of 23.73% during the quarter. The current value of the position is $1,127,874 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)
2026-05-08 2026-03-31 13F TETRA TECH INC COM 88162G103 40,571 7,780 23.73 1,222 11.10 0.0058
2026-02-12 2025-12-31 13F TETRA TECH INC COM 88162G103 32,791 8,632 35.73 1,100 36.35 0.0064
2025-11-05 2025-09-30 13F TETRA TECH INC COM 88162G103 24,159 12,027 99.13 806 84.86 0.0045
2025-08-11 2025-06-30 13F TETRA TECH INC COM 88162G103 12,132 12,132 436 0.0025
2023-11-14 2023-09-30 13F TETRA TECH INC COM 88162G103 0 -13,595 -100.00 0 -100.00
2023-08-14 2023-06-30 13F TETRA TECH INC COM 88162G103 13,595 4,215 44.94 2,226 61.54 0.0193
2023-05-10 2023-03-31 13F TETRA TECH INC COM 88162G103 9,380 1,040 12.47 1,378 13.88 0.0122
2023-02-14 2022-12-31 13F TETRA TECH INC COM 88162G103 8,340 840 11.20 1,211 25.52 0.0108
2022-11-14 2022-09-30 13F TETRA TECH INC COM 88162G103 7,500 7,500 964 0.0091
2019-05-01 2019-03-31 13F TETRA TECH COMMON STOCK 88162G103 0 -6,337 -100.00 0 -100.00
2019-02-04 2018-12-31 13F TETRA TECH COMMON STOCK 88162G103 6,337 -591 -8.53 328 -30.66 0.0025
2018-10-25 2018-09-30 13F TETRA TECH COMMON STOCK 88162G103 6,928 6,928 473 0.0031
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.