Tetra Tech, Inc.
US ˙ NasdaqGS ˙ US88162G1031

SecurityTTEK / Tetra Tech, Inc.
InstitutionNeuberger Berman Group LLC
Latest Disclosed Ownership7,269,657 shares
Latest Disclosed Value $ 218,962,082
Neuberger Berman Group LLC reports 12.95% decrease in ownership of TTEK / Tetra Tech, Inc.

On May 14, 2026 - Neuberger Berman Group LLC filed a 13F-HR form disclosing ownership of 7,269,657 shares of Tetra Tech, Inc. (US:TTEK) valued at $218,962,069 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 8,351,221 shares of Tetra Tech, Inc.. This represents a change in shares of -12.95% during the quarter. The current value of the position is $202,823,430 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 Common 88162G103 7,269,657 -1,081,564 -12.95 218,962 -21.83 0.0852
2026-02-13 2025-12-31 13F TETRA TECH Common 88162G103 8,351,221 -676,477 -7.49 280,100 -7.05 0.2085
2025-11-12 2025-09-30 13F TETRA TECH Common 88162G103 9,027,698 124,570 1.40 301,345 -5.88 0.2202
2025-08-25 2025-06-30 13F/A-1 TETRA TECH Common 88162G103 8,903,128 -37,620 -0.42 320,156 22.42 0.2464
2025-08-13 2025-06-30 13F TETRA TECH Common 88162G103 8,903,128 -37,620 320,156 0.1274
2025-05-13 2025-03-31 13F TETRA TECH Common 88162G103 8,940,748 231,016 2.65 261,517 -24.63 0.2190
2025-02-13 2024-12-31 13F TETRA TECH Common 88162G103 8,709,732 223,493 2.63 346,996 -13.30 0.2755
2024-11-14 2024-09-30 13F TETRA TECH Common 88162G103 8,486,239 6,823,552 410.39 400,209 17.71 0.3123
2024-11-14 2024-06-30 13F/A-1 TETRA TECH Common 88162G103 1,662,687 -23,607 -1.40 339,986 9.15 0.2791
2024-08-13 2024-06-30 13F TETRA TECH Common 88162G103 1,662,687 -23,607 339,986 0.2790
2024-11-14 2024-03-31 13F/A-1 TETRA TECH Common 88162G103 1,686,294 90,004 5.64 311,475 16.89 0.2575
2024-05-13 2024-03-31 13F TETRA TECH Common 88162G103 1,686,294 90,004 311,475 0.2574
2024-11-14 2023-12-31 13F/A-2 TETRA TECH Common 88162G103 1,596,290 28,288 1.80 266,469 11.78 0.2324
2024-02-09 2023-12-31 13F TETRA TECH Common 88162G103 1,596,290 28,288 266,469 0.2324
2023-11-14 2023-09-30 13F TETRA TECH Common 88162G103 1,568,002 -42,802 -2.66 238,383 -9.62 0.2172
2023-08-11 2023-06-30 13F TETRA TECH Common 88162G103 1,610,804 -67,262 -4.01 263,753 6.99 0.2358
2023-05-12 2023-03-31 13F TETRA TECH Common 88162G103 1,678,066 -37,823 -2.20 246,525 -1.05 0.2286
2023-02-13 2022-12-31 13F TETRA TECH Common 88162G103 1,715,889 -35,322 -2.02 249,130 10.68 0.2442
2022-11-15 2022-09-30 13F TETRA TECH Common 88162G103 1,751,211 -11,813 -0.67 225,083 -6.50 0.2350
2022-08-15 2022-06-30 13F TETRA TECH Common 88162G103 1,763,024 -37,281 -2.07 240,741 -18.93 0.2419
2022-05-23 2022-03-31 13F/A-1 TETRA TECH Common 88162G103 1,800,305 -33,296 -1.82 296,943 -3.84 0.2516
2022-05-13 2022-03-31 13F TETRA TECH Common 88162G103 1,800,305 -33,296 293,553 0.2566
2022-02-11 2021-12-31 13F TETRA TECH Common 88162G103 1,833,601 -91,740 -4.76 308,785 8.19 0.2423
2021-11-12 2021-09-30 13F TETRA TECH Common 88162G103 1,925,341 -18,586 -0.96 285,421 20.69 0.2495
2021-08-13 2021-06-30 13F TETRA TECH Common 88162G103 1,943,927 -51,028 -2.56 236,499 -12.36 0.2064
2021-05-13 2021-03-31 13F TETRA TECH Common 88162G103 1,994,955 117,699 6.27 269,863 24.41 0.2578
2021-02-10 2020-12-31 13F TETRA TECH Common 88162G103 1,877,256 276,416 17.27 216,915 42.05 0.2249
2020-11-12 2020-09-30 13F TETRA TECH Common 88162G103 1,600,840 150,450 10.37 152,698 33.06 0.1811
2020-08-13 2020-06-30 13F TETRA TECH Common 88162G103 1,450,390 189,460 15.03 114,755 28.87 0.1427
2020-05-14 2020-03-31 13F TETRA TECH Common 88162G103 1,260,930 54,042 4.48 89,046 -14.37 0.1357
2020-02-12 2019-12-31 13F TETRA TECH Common 88162G103 1,206,888 75,462 6.67 103,986 5.93 0.1214
2019-11-13 2019-09-30 13F TETRA TECH Common 88162G103 1,131,426 494,020 77.50 98,163 96.06 0.1199
2019-08-13 2019-06-30 13F TETRA TECH Common 88162G103 637,406 154,466 31.98 50,068 73.97 0.0599
2019-05-13 2019-03-31 13F TETRA TECH Common 88162G103 482,940 -93,826 -16.27 28,779 -3.62 0.0353
2019-02-12 2018-12-31 13F TETRA TECH Common 88162G103 576,766 -5,233 -0.90 29,860 -24.88 0.0416
2018-11-16 2018-09-30 13F/A-1 TETRA TECH Common 88162G103 581,999 -117,373 -16.78 39,751 -2.84 0.0450
2018-11-13 2018-09-30 13F TETRA TECH Common 88162G103 581,999 -117,373 39,751
2018-08-13 2018-06-30 13F TETRA TECH Common 88162G103 699,372 -36,094 -4.91 40,914 13.65 0.0452
2018-05-08 2018-03-31 13F TETRA TECH Common 88162G103 735,466 -46,059 -5.89 36,001 -4.33 0.0411
2018-02-14 2017-12-31 13F TETRA TECH Common 88162G103 781,525 -1,963 -0.25 37,630 3.18 0.0433
2017-11-15 2017-09-30 13F TETRA TECH INC COMMON STOCK 88162G103 783,488 10,692 1.38 36,471 3.16 0.0456
2017-08-08 2017-06-30 13F TETRA TECH INC COMMON STOCK 88162G103 772,796 -70,135 -8.32 35,355 2.67 0.0454
2017-05-10 2017-03-31 13F TETRA TECH INC COMMON STOCK 88162G103 842,931 -21,258 -2.46 34,434 -7.66 0.0444
2017-02-06 2016-12-31 13F TETRA TECH INC COMMON STOCK 88162G103 864,189 -64,132 -6.91 37,290 13.25 0.0501
2016-11-02 2016-09-30 13F TETRA TECH INC COMMON STOCK 88162G103 928,321 -191,551 -17.10 32,928 -4.36 0.0447
2016-08-05 2016-06-30 13F TETRA TECH INC COMMON STOCK 88162G103 1,119,872 10,126 0.91 34,430 4.04 0.0474
2016-05-06 2016-03-31 13F TETRA TECH INC COMMON STOCK 88162G103 1,109,746 -57,669 -4.94 33,093 8.94 0.0455
2016-01-28 2015-12-31 13F TETRA TECH INC COMMON STOCK 88162G103 1,167,415 -15,139 -1.28 30,376 5.66 0.0398
2015-11-10 2015-09-30 13F TETRA TECH INC COMMON STOCK 88162G103 1,182,554 -5,095 -0.43 28,748 -5.59 0.0370
2015-07-31 2015-06-30 13F TETRA TECH INC COMMON STOCK 88162G103 1,187,649 255,669 27.43 30,451 36.03 0.0339
2015-05-06 2015-03-31 13F TETRA TECH INC COMMON STOCK 88162G103 931,980 931,980 0.00 22,386 0.0239
2015-02-05 2014-12-31 13F TETRA TECH INC COMMON STOCK 88162G103 0 -769,385 -100.00 0 -100.00
2014-11-04 2014-09-30 13F TETRA TECH INC COMMON STOCK 88162G103 769,385 52,932 7.39 19,219 -2.45 0.0197
2014-08-05 2014-06-30 13F TETRA TECH INC COMMON STOCK 88162G103 716,453 -7,143 -0.99 19,702 -7.98 0.0192
2014-05-05 2014-03-31 13F TETRA TECH INC COMMON STOCK 88162G103 723,596 -31,811 -4.21 21,411 1.30 0.0218
2014-02-11 2013-12-31 13F TETRA TECH INC COMMON STOCK 88162G103 755,407 -107,113 -12.42 21,136 -5.35 0.0217
2013-10-29 2013-09-30 13F/A-1 TETRA TECH INC COMMON STOCK 88162G103 862,520 -72,204 -7.72 22,331 1.62 0.0248
2013-10-29 2013-09-30 13F TETRA TECH INC COMMON STOCK 88162G103 1,148,847 30,284
2013-08-13 2013-06-30 13F TETRA TECH INC COMMON STOCK 88162G103 934,724 934,724 21,975 0.0261
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.