테트라테크(주)
DE ˙ DB ˙ US88162G1031
€23.41 ↑0.45 (1.96%)
2026-06-05
주가
SecurityDE:TT6 / Tetra Tech, Inc.
InstitutionAlliancebernstein L.p.
Latest Disclosed Ownership2,637,734 shares
Ownership 5.00%
Alliancebernstein L.p. ownership in TT6 / Tetra Tech, Inc.

2024-02-14 - Alliancebernstein L.p. has filed an SC 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 2,637,734 shares of Tetra Tech, Inc. (DE:TT6). This represents 5.0 percent ownership of the company. In their previous filing dated 2023-02-14 , Alliancebernstein L.p. had reported owning 2,955,535 shares, indicating a decrease of -10.75 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2024-02-14 2024-02-14 13G/A 2,955,535 2,637,734 -10.75 5.00 -10.71
2023-02-14 2023-02-14 13G 2,955,535 2,955,535 0.00 5.60 0.00

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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 2,807,465 -271,534 -8.82 94,162 -8.82 0.0255
2026-02-17 2025-12-31 13F TETRA TECH INC COM 88162G103 3,078,999 -3,502,245 -53.22 103,270 -52.99 0.0326
2025-11-14 2025-09-30 13F TETRA TECH INC COM 88162G103 6,581,244 705,673 12.01 219,682 3.97 0.0692
2025-08-14 2025-06-30 13F TETRA TECH INC COM 88162G103 5,875,571 -265,653 -4.33 211,286 17.62 0.0689
2025-05-15 2025-03-31 13F TETRA TECH INC COM 88162G103 6,141,224 -1,709,763 -21.78 179,631 -42.57 0.0650
2025-02-12 2024-12-31 13F TETRA TECH INC COM 88162G103 7,850,987 -3,485,428 -30.75 312,783 -41.49 0.1062
2024-11-14 2024-09-30 13F TETRA TECH INC COM 88162G103 11,336,415 8,903,899 366.04 534,625 7.48 0.1796
2024-08-14 2024-06-30 13F TETRA TECH INC COM 88162G103 2,432,516 -113,731 -4.47 497,401 5.76 0.1735
2024-05-14 2024-03-31 13F TETRA TECH INC COM 88162G103 2,546,247 -91,487 -3.47 470,317 6.81 0.1664
2024-02-14 2023-12-31 13F TETRA TECH INC COM 88162G103 2,637,734 -10,337 -0.39 440,317 9.37 0.1694
2023-11-14 2023-09-30 13F TETRA TECH INC COM 88162G103 2,648,071 -38,025 -1.42 402,586 -8.47 0.1712
2023-08-15 2023-06-30 13F TETRA TECH INC COM 88162G103 2,686,096 -391,709 -12.73 439,821 -2.73 0.1795
2023-05-15 2023-03-31 13F TETRA TECH INC COM 88162G103 3,077,805 129,103 4.38 452,160 5.61 0.1937
2023-02-15 2022-12-31 13F TETRA TECH INC COM 88162G103 2,948,702 -250,817 -7.84 428,122 4.11 0.1927
2022-11-15 2022-09-30 13F TETRA TECH INC COM 88162G103 3,199,519 -150,264 -4.49 411,234 -10.10 0.1991
2022-08-15 2022-06-30 13F TETRA TECH INC COM 88162G103 3,349,783 -275,305 -7.59 457,413 -23.50 0.2089
2022-05-13 2022-03-31 13F TETRA TECH INC COM 88162G103 3,625,088 1,036,390 40.04 597,922 36.03 0.2307
2022-02-14 2021-12-31 13F TETRA TECH INC COM 88162G103 2,588,698 8,827 0.34 439,561 14.09 0.1554
2021-11-10 2021-09-30 13F TETRA TECH INC COM 88162G103 2,579,871 220,145 9.33 385,278 33.79 0.1520
2021-07-30 2021-06-30 13F TETRA TECH INC COM 88162G103 2,359,726 157,847 7.17 287,981 -3.63 0.1156
2021-05-06 2021-03-31 13F TETRA TECH INC COM 88162G103 2,201,879 243,786 12.45 298,839 31.82 0.1310
2021-02-08 2020-12-31 13F TETRA TECH INC COM 88162G103 1,958,093 721,009 58.28 226,708 91.89 0.1070
2020-11-12 2020-09-30 13F TETRA TECH INC COM 88162G103 1,237,084 138,367 12.59 118,142 35.90 0.0636
2020-08-13 2020-06-30 13F TETRA TECH INC COM 88162G103 1,098,717 61,440 5.92 86,930 18.67 0.0511
2020-05-14 2020-03-31 13F TETRA TECH INC COM 88162G103 1,037,277 45,718 4.61 73,253 -14.26 0.0525
2020-02-18 2019-12-31 13F TETRA TECH INC COM 88162G103 991,559 2,669 0.27 85,433 -0.42 0.0485
2019-11-14 2019-09-30 13F TETRA TECH INC COM 88162G103 988,890 -92,322 -8.54 85,796 1.02 0.0534
2019-08-14 2019-06-30 13F TETRA TECH INC COM 88162G103 1,081,212 -9,643 -0.88 84,929 30.65 0.0528
2019-05-14 2019-03-31 13F TETRA TECH INC COM 88162G103 1,090,855 136,141 14.26 65,004 31.52 0.0423
2019-02-13 2018-12-31 13F TETRA TECH INC COM 88162G103 954,714 -29,669 -3.01 49,426 -26.49 0.0367
2018-11-08 2018-09-30 13F TETRA TECH INC COM 88162G103 984,383 -37,512 -3.67 67,233 12.47 0.0439
2018-08-13 2018-06-30 13F TETRA TECH INC COM 88162G103 1,021,895 211,961 26.17 59,781 50.79 0.0416
2018-05-14 2018-03-31 13F TETRA TECH INC COM 88162G103 809,934 -5,528 -0.68 39,646 0.97 0.0287
2018-02-13 2017-12-31 13F TETRA TECH INC COM 88162G103 815,462 -32,479 -3.83 39,264 -0.53 0.0281
2017-11-13 2017-09-30 13F TETRA TECH INC COM 88162G103 847,941 66,177 8.47 39,472 10.36 0.0296
2017-08-10 2017-06-30 13F TETRA TECH INC COM 88162G103 781,764 107,602 15.96 35,766 29.87 0.0277
2017-05-11 2017-03-31 13F TETRA TECH INC COM 88162G103 674,162 44,907 7.14 27,540 1.43 0.0219
2017-02-13 2016-12-31 13F TETRA TECH INC COM 88162G103 629,255 444,913 241.35 27,152 315.23 0.0226
2016-11-10 2016-09-30 13F TETRA TECH INC COM 88162G103 184,342 35,570 23.91 6,539 42.96 0.0055
2016-08-11 2016-06-30 13F TETRA TECH INC COM 88162G103 148,772 20,251 15.76 4,574 19.36 0.0039
2016-05-13 2016-03-31 13F TETRA TECH INC COM 88162G103 128,521 14,860 13.07 3,832 29.59 0.0033
2016-02-16 2015-12-31 13F/A-1 TETRA TECH INC COM 88162G103 113,661 -3,910 -3.33 2,957 3.46 0.0025
2016-02-12 2015-12-31 13F TETRA TECH INC COM 88162G103 113,661 2,763
2015-11-13 2015-09-30 13F TETRA TECH INC COM 88162G103 117,571 -16,730 -12.46 2,858 -16.99 0.0025
2015-08-14 2015-06-30 13F TETRA TECH INC COM 88162G103 134,301 -6,600 -4.68 3,443 1.74 0.0028
2015-05-13 2015-03-31 13F TETRA TECH COM 88162G103 140,901 -2,840 -1.98 3,384 -11.83 0.0027
2015-02-13 2014-12-31 13F TETRA TECH COM 88162G103 143,741 2,000 1.41 3,838 8.39 0.0032
2014-11-13 2014-09-30 13F TETRA TECH COM 88162G103 141,741 -3,800 -2.61 3,541 -11.52 0.0030
2014-08-13 2014-06-30 13F TETRA TECH COM 88162G103 145,541 -358 -0.25 4,002 -7.30 0.0034
2014-05-13 2014-03-31 13F TETRA TECH COM 88162G103 145,899 -3,291 -2.21 4,317 3.43 0.0037
2014-02-13 2013-12-31 13F TETRA TECH COM 88162G103 149,190 -11 -0.01 4,174 8.05 0.0037
2013-11-14 2013-09-30 13F TETRA TECH COM 88162G103 149,201 14,699 10.93 3,863 22.17 0.0038
2013-08-13 2013-06-30 13F TETRA TECH COM 88162G103 134,502 134,502 3,162 0.0034
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.