テトラテック株式会社
MX ˙ BMV ˙ US88162G1031
SecurityMX:TTEK / Tetra Tech, Inc.
InstitutionBnp Paribas Arbitrage, Sa
Latest Disclosed Ownership695,204 shares
Latest Disclosed Value $ 20,939,544
Bnp Paribas Arbitrage, Sa reports 30.62% decrease in ownership of TTEK / Tetra Tech, Inc.

On May 12, 2026 - Bnp Paribas Arbitrage, Sa filed a 13F-HR form disclosing ownership of 695,204 shares of Tetra Tech, Inc. (MX:TTEK) valued at $20,939,544 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 1,002,076 shares of Tetra Tech, Inc.. This represents a change in shares of -30.62% during the quarter.

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)
2026-05-12 2026-03-31 13F Tetra Tech Equity 88162G103 695,204 -306,872 -30.62 20,940 -37.70 0.0010
2026-02-10 2025-12-31 13F Tetra Tech Equity 88162G103 1,002,076 242,735 31.97 33,610 32.60 0.0152
2025-11-13 2025-09-30 13F Tetra Tech Equity 88162G103 759,341 -10,307 -1.34 25,347 -8.42 0.0135
2025-08-14 2025-06-30 13F Tetra Tech Equity 88162G103 769,648 -12,596 -1.61 27,677 20.96 0.0159
2025-05-14 2025-03-31 13F Tetra Tech Equity 88162G103 782,244 37,591 5.05 22,881 -22.87 0.0135
2025-02-14 2024-12-31 13F Tetra Tech Equity 88162G103 744,653 102,122 15.89 29,667 -2.10 0.0166
2024-11-13 2024-09-30 13F Tetra Tech Equity 88162G103 642,531 464,416 260.74 30,302 -16.80 0.0204
2024-08-13 2024-06-30 13F Tetra Tech Equity 88162G103 178,115 -20,089 -10.14 36,421 -0.52 0.0297
2024-05-01 2024-03-31 13F Tetra Tech Equity 88162G103 198,204 11,297 6.04 36,610 17.34 0.0322
2024-02-14 2023-12-31 13F/A-2 Tetra Tech Equity 88162G103 186,907 20,481 12.31 31,200 23.32 0.0354
2024-02-07 2023-12-31 13F/A-1 Tetra Tech Equity 88162G103 186,907 20,481 31,200 0.0044
2024-02-07 2023-12-31 13F Tetra Tech Equity 88162G103 186,907 31,200
2023-11-14 2023-09-30 13F Tetra Tech Equity 88162G103 166,426 150,060 916.90 25,302 844.42 0.0325
2023-08-09 2023-06-30 13F Tetra Tech Equity 88162G103 16,366 -7,881 -32.50 2,680 -24.79 0.0034
2023-05-12 2023-03-31 13F TETRA TECH EQUITY 88162G103 24,247 -21,573 -47.08 3,562 -46.45 0.0050
2023-02-14 2022-12-31 13F Tetra Tech Equity 88162G103 45,820 12,780 38.68 6,653 56.67 0.0102
2022-11-16 2022-09-30 13F/A-1 Tetra Tech Equity 88162G103 33,040 8,302 33.56 4,247 25.73 0.0068
2022-11-15 2022-09-30 13F Tetra Tech Equity 88162G103 33,040 8,302 4,247 0.0010
2022-08-12 2022-06-30 13F Tetra Tech Equity 88162G103 24,738 2,563 11.56 3,378 -7.66 0.0053
2022-05-18 2022-03-31 13F/A-1 Tetra Tech Equity 88162G103 22,175 -3,257 -12.81 3,658 -15.31 0.0049
2022-02-09 2021-12-31 13F TETRA TECH EQUITY 88162G103 25,432 8,530 50.47 4,318 71.08 0.0061
2021-11-16 2021-09-30 13F/A-1 TETRA TECH EQUITY 88162G103 16,902 -4,092 -19.49 2,524 -1.48 0.0036
2021-11-12 2021-09-30 13F TETRA TECH EQUITY 88162G103 10,270 -10,724 981 0.0000
2021-08-10 2021-06-30 13F TETRA TECH EQUITY 88162G103 20,994 2,169 11.52 2,562 0.31 0.0034
2021-05-07 2021-03-31 13F TETRA TECH EQUITY 88162G103 18,825 4,380 30.32 2,555 52.75 0.0037
2021-02-10 2020-12-31 13F TETRA TECH EQUITY 88162G103 14,445 4,175 40.65 1,672 70.61 0.0031
2020-10-30 2020-09-30 13F TETRA TECH EQUITY 88162G103 10,270 2,912 39.58 981 68.38 0.0014
2020-08-06 2020-06-30 13F TETRA TECH EQUITY 88162G103 7,358 -64,461 -89.75 582 -88.52 0.0010
2020-05-13 2020-03-31 13F TETRA TECH EQUITY 88162G103 71,819 -4,318 -5.67 5,072 -22.69 0.0104
2020-02-12 2019-12-31 13F TETRA TECH EQUITY 88162G103 76,137 62,722 467.55 6,560 463.97 0.0119
2019-11-07 2019-09-30 13F TETRA TECH EQUITY 88162G103 13,415 2,073 18.28 1,164 30.67 0.0021
2019-07-30 2019-06-30 13F TETRA TECH EQUITY 88162G103 11,342 -2,574 -18.50 891 7.36 0.0018
2019-04-25 2019-03-31 13F TETRA TECH EQUITY 88162G103 13,916 11,726 535.43 829 633.63 0.0018
2019-02-12 2018-12-31 13F TETRA TECH EQUITY 88162G103 2,190 -2,190 -50.00 113 -62.21 0.0003
2018-11-07 2018-09-30 13F TETRA TECH EQUITY 88162G103 4,380 290 7.09 299 25.10 0.0004
2018-07-25 2018-06-30 13F TETRA TECH EQUITY 88162G103 4,090 -14,538 -78.04 239 -73.77 0.0004
2018-05-11 2018-03-31 13F TETRA TECH EQUITY 88162G103 18,628 -5,466 -22.69 912 -21.47 0.0017
2018-03-05 2017-12-31 13F/A-1 TETRA TECH EQUITY 88162G103 24,094 -11,379 -32.08 1,160 -29.74 0.0021
2018-02-01 2017-12-31 13F TETRA TECH EQUITY 88162G103 24,094 -11,379 1,160
2017-11-03 2017-09-30 13F TETRA TECH INC STOCK 88162G103 35,473 8,924 33.61 1,651 36.00 0.0040
2017-08-03 2017-06-30 13F TETRA TECH INC STOCK 88162G103 26,549 7,426 38.83 1,215 55.44 0.0037
2017-05-03 2017-03-31 13F TETRA TECH INC STOCK 88162G103 19,123 688 3.73 781 -1.76 0.0021
2017-02-14 2016-12-31 13F TETRA TECH INC STOCK 88162G103 18,435 7,247 64.77 795 100.76 0.0037
2016-10-05 2016-09-30 13F * TETRA TECH INC NEW COM STOCK 88162G103 11,188 -11,048 -49.69 397 -42.02 0.0016
2016-07-06 2016-06-30 13F * TETRA TECH INC NEW COM STOCK 88162G103 22,236 10,385 87.63 684 93.48 0.0031
2016-04-22 2016-03-31 13F * TETRA TECH INC NEW COM STOCK 88162G103 11,851 -94 -0.79 353 13.87 0.0015
2016-04-19 2015-12-31 13F/A-1 * TETRA TECH INC NEW COM STOCK 88162G103 11,945 -4,389 -26.87 311 -21.91 0.0015
2016-02-10 2015-12-31 13F * TETRA TECH INC NEW COM STOCK 88162G103 11,945 311
2015-11-13 2015-09-30 13F * TETRA TECH INC NEW COM STOCK 88162G103 16,334 357 2.23 397 -2.93 0.0010
2015-08-14 2015-06-30 13F TETRA TECH INC NEW COM STOCK 88162G103 15,977 -1,770 -9.97 410 -3.99 0.0011
2015-05-15 2015-03-31 13F * TETRA TECH INC NEW COM STOCK 88162G103 17,747 11,011 163.46 426 137.99 0.0012
2015-03-10 2014-12-31 13F/A-1 * TETRA TECH INC NEW COM STOCK 88162G103 6,736 -25,097 -78.84 180 -77.48 0.0006
2015-02-11 2014-12-31 13F * TETRA TECH INC NEW COM STOCK 88162G103 6,736 180
2014-11-12 2014-09-30 13F * TETRA TECH INC NEW COM STOCK 88162G103 31,833 -13,065 -29.10 795 -35.58 0.0007
2014-08-14 2014-06-30 13F/A-1 * TETRA TECH INC NEW COM STOCK 88162G103 44,898 19,340 75.67 1,235 68.58 0.0012
2014-08-14 2014-06-30 13F TETRA TECH INC NEW COM STOCK 88162G103 44,898 1,235
2014-05-13 2014-03-31 13F TETRA TECH INC STOCK 88162G103 25,558 -1,286 -4.79 733 -2.53 0.0006
2014-04-02 2013-12-31 13F/A-1 TETRA TECH INC STOCK 88162G103 26,844 -4,407 -14.10 751 -7.17 0.0005
2014-02-12 2013-12-31 13F TETRA TECH INC STOCK 88162G103 26,844 751
2013-11-13 2013-09-30 13F TETRA TECH INC STOCK 88162G103 31,251 -776 -2.42 809 7.58 0.0006
2013-08-13 2013-06-30 13F TETRA TECH INC STOCK 88162G103 32,027 32,027 753 0.0005
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.