TETRA TECH INC - COMMON STOCK (TTEK) Institutional Ownership

13F Institutional Holders and Ownership History from Q1 2014 to Q4 2025

Type / Class
Equity / COMMON STOCK
Symbol
TTEK on Nasdaq
Shares outstanding
265,433,531
Price per share
$33.54
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares
246,158,577
Total reported value
$8,217,245,856
% of total 13F portfolios
0.01%
Share change
-2,932,932
Value change
-$117,123,067
Number of holders
589
Price from insider filings
$33.54
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of TETRA TECH INC - COMMON STOCK (TTEK) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
VANGUARD GROUP INC 10% $812,039,697 27,185,795 The Vanguard Group 31 Mar 2025
BlackRock, Inc. 9.7% $777,419,710 26,026,773 BlackRock, Inc. 31 Dec 2024
PICTET ASSET MANAGEMENT SA 4.9% -8% $434,148,391 -$48,471,298 13,006,243 -10% PICTET ASSET MANAGEMENT SA 16 Oct 2025

As of 30 Sep 2025, 589 institutional investors reported holding 246,158,577 shares of TETRA TECH INC - COMMON STOCK (TTEK). This represents 93% of the company’s total 265,433,531 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of TETRA TECH INC - COMMON STOCK (TTEK) together control 60% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
VANGUARD GROUP INC 9.9% 26,301,722 -1.1% 0.01% $877,951,480
BlackRock, Inc. 9.6% 25,506,017 -0.74% 0.02% $851,390,862
Pictet Asset Management Holding SA 5.3% 14,189,245 +2.5% 0.46% $473,641,448
STATE STREET CORP 4.3% 11,292,728 -5.4% 0.01% $376,951,261
NEUBERGER BERMAN GROUP LLC 3.4% 9,027,698 +1.4% 0.22% $301,344,548
SANDS CAPITAL MANAGEMENT, LLC 2.7% 7,179,032 +38% 0.66% $239,636,088
Capital International Investors 2.7% 7,079,675 +249% 0.04% $236,319,552
ALLIANCEBERNSTEIN L.P. 2.5% 6,581,244 +12% 0.07% $219,681,925
Amundi 2.2% 5,759,681 -15% 0.06% $193,251,053
GEODE CAPITAL MANAGEMENT, LLC 1.9% 5,029,967 +1.4% 0.01% $167,930,297
FIL Ltd 1.6% 4,286,250 -7.9% 0.11% $143,075,025
DIMENSIONAL FUND ADVISORS LP 1.4% 3,593,261 +1.4% 0.03% $119,946,579
BANK OF AMERICA CORP /DE/ 1.1% 3,012,051 +1.4% 0.01% $100,542,270
LGT Group Foundation 1.1% 2,978,570 +6.3% 1.1% $98,858,738
Ninety One UK Ltd 1.1% 2,870,244 +2.8% 0.21% $95,808,748
Bank of New York Mellon Corp 0.99% 2,636,199 +5.4% 0.02% $87,996,319
NORTHERN TRUST CORP 0.96% 2,552,207 -1.7% 0.01% $85,192,670
AMERIPRISE FINANCIAL INC 0.96% 2,536,018 +5.8% 0.02% $84,652,266
M&G PLC 0.91% 2,409,574 -0.29% 0.43% $79,515,942
MORGAN STANLEY 0.9% 2,381,395 -12% 0% $79,491,006
Robeco Schweiz AG 0.9% 2,379,020 -15% 1.8% $79,411,688
Invesco Ltd. 0.87% 2,310,220 -8.7% 0.01% $77,115,156
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.8% 2,131,414 +0.96% 0.01% $71,146,599
Van Berkom & Associates Inc. 0.78% 2,065,070 +0.11% 2% $68,932,000
FIRST TRUST ADVISORS LP 0.75% 1,981,493 +52% 0.05% $66,142,181

Institutional Holders of TETRA TECH INC - COMMON STOCK (TTEK) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 5,188,042 $174,430,293 -$12,728,252 $33.54 73
2025 Q3 246,158,577 $8,217,245,856 -$117,123,067 $33.38 589
2025 Q2 249,240,102 $8,933,265,268 +$295,103,234 $35.96 581
2025 Q1 242,317,489 $7,089,275,082 +$25,192,369 $29.25 557
2024 Q4 237,065,757 $9,444,675,855 -$40,684,492 $39.84 627
2024 Q3 234,677,392 $11,066,795,271 +$7,606,765,925 $47.16 632
2024 Q2 48,300,205 $9,885,115,778 +$356,637,260 $204.48 595
2024 Q1 46,032,870 $8,504,285,156 -$94,941,630 $184.71 505
2023 Q4 1,796,576 $299,902,268 +$35,629,558 $166.93 6
2023 Q3 45,448,760 $6,912,665,937 +$59,873,696 $152.03 461
2023 Q2 46,214,786 $7,565,269,256 -$113,603,033 $163.74 440
2023 Q1 46,379,952 $6,805,019,729 +$68,408,962 $146.91 434
2022 Q4 45,892,284 $6,663,290,181 -$22,392,431 $145.19 457
2022 Q3 45,534,359 $5,852,951,561 -$75,856,988 $128.53 393
2022 Q2 46,127,884 $6,285,722,424 -$115,345,940 $136.55 393
2022 Q1 46,441,008 $7,661,681,970 +$104,532,103 $164.94 382
2021 Q4 44,606,122 $7,572,031,152 -$86,914,397 $169.80 384
2021 Q3 46,629,892 $6,961,757,084 +$119,099,772 $149.34 347
2021 Q2 46,547,598 $5,680,011,773 -$82,776,216 $122.04 357
2021 Q1 47,595,681 $6,440,021,468 +$27,856,784 $135.72 358
2020 Q4 46,563,300 $5,394,568,514 +$47,089,444 $115.78 352
2020 Q3 46,162,058 $4,408,278,524 +$28,370,444 $95.50 317
2020 Q2 45,781,819 $3,622,496,401 -$4,553,572 $79.12 297
2020 Q1 46,048,689 $3,251,912,242 -$33,528,473 $70.62 303
2019 Q4 47,196,344 $4,066,422,196 -$34,225,229 $86.16 330
2019 Q3 47,513,384 $4,121,977,426 -$126,841,412 $86.76 337
2019 Q2 49,054,558 $3,853,443,893 +$236,915,938 $78.55 321
2019 Q1 48,767,696 $2,906,032,698 +$4,930,720 $59.59 312
2018 Q4 48,535,009 $2,512,185,009 -$2,267,484 $51.77 316
2018 Q3 48,458,389 $3,309,408,367 -$18,652,639 $68.30 304
2018 Q2 48,746,812 $2,851,345,689 +$116,818,917 $58.50 275
2018 Q1 49,086,768 $2,402,408,409 +$20,098,191 $48.95 286
2017 Q4 48,956,711 $2,357,439,424 -$29,088,349 $48.15 292
2017 Q3 48,917,701 $2,276,810,754 -$6,106,194 $46.55 263
2017 Q2 49,749,397 $2,275,799,146 -$14,261,063 $45.75 281
2017 Q1 49,951,215 $2,040,457,351 +$317,314,931 $40.85 256
2016 Q4 48,573,713 $2,095,938,911 -$59,121,176 $43.15 271
2016 Q3 50,925,127 $1,803,130,764 -$46,346,588 $35.47 248
2016 Q2 52,053,594 $1,600,004,167 -$14,057,342 $30.74 238
2016 Q1 54,337,340 $1,618,571,783 -$19,641,995 $29.82 237
2015 Q4 54,995,819 $1,431,158,010 +$6,765,801 $26.02 235
2015 Q3 54,771,831 $1,331,476,896 -$11,490,538 $24.31 224
2015 Q2 55,033,018 $1,412,092,763 +$26,384,760 $25.64 211
2015 Q1 54,914,404 $1,323,678,951 -$12,467,709 $24.02 204
2014 Q4 54,254,646 $1,447,915,678 -$42,403,319 $26.70 208
2014 Q3 56,645,922 $1,414,988,688 -$59,726,225 $24.98 204
2014 Q2 59,682,903 $1,641,142,379 -$40,222,812 $27.50 213
2014 Q1 60,031,219 $1,772,846,490 +$6,250,433 $29.59 215