Security Snapshot

TETRA TECH INC - Common Stock (TTEK) Institutional Ownership

CUSIP: 88162G103

13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026

Latest Period

Q4 2025

Institutions Reporting

602

Shares (Excl. Options)

241,475,254

Price

$33.54

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Type / Class
Equity / Common Stock
Symbol
TTEK on Nasdaq
Shares outstanding
261,125,354
Price per share
$30.85
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
241,475,254
Total reported value
$8,103,892,642
% of total 13F portfolios
0.01%
Share change
-4,741,604
Value change
-$158,106,342
Number of holders
602
Price from insider filings
$30.85
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Quick Takeaways

  • TTEK - TETRA TECH INC - Common Stock is tracked under CUSIP 88162G103.
  • 602 institutions reported positions in Q4 2025.
  • 3 significant owners is listed from Schedule 13D/13G reporting.

What Changed

  • Holder count moved from 602 to 473 between Q4 2025 and Q1 2026.
  • Reported value moved from $8,103,892,642 to $5,454,759,529.

Why This Matters

  • You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
  • 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.

Source Evidence

Source: SEC Form 13F

Latest holder context comes from 602 institutions filings for Q4 2025.

Open SEC Evidence

Investment Quick Answers

What is CUSIP 88162G103?
CUSIP 88162G103 identifies TTEK - TETRA TECH INC - Common Stock in SEC 13F datasets.

Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.

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
BlackRock, Inc. 9.7% $819,843,350 26,026,773 BlackRock, Inc. 31 Dec 2024
VANGUARD CAPITAL MANAGEMENT LLC 5.2% $411,344,503 13,656,856 Vanguard Capital Management 31 Mar 2026
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 31 Dec 2025, 602 institutional investors reported holding 241,475,254 shares of TETRA TECH INC - Common Stock (TTEK). This represents 92% of the company’s total 261,125,354 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of TETRA TECH INC - Common Stock (TTEK) together control 59% 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% 25,800,544 -1.9% 0.01% $865,350,246
BlackRock, Inc. 9.9% 25,731,629 +0.88% 0.01% $863,038,830
Pictet Asset Management Holding SA 4.3% 11,204,346 -21% 0.36% $375,811,134
STATE STREET CORP 3.6% 9,424,246 -17% 0.01% $316,089,211
Capital International Investors 3.5% 9,016,577 +27% 0.05% $302,415,993
NEUBERGER BERMAN GROUP LLC 3.2% 8,351,221 -7.5% 0.21% $280,099,964
SANDS CAPITAL MANAGEMENT, LLC 2.7% 7,007,004 -2.4% 0.71% $235,014,914
Amundi 2% 5,095,797 -12% 0.05% $170,897,995
GEODE CAPITAL MANAGEMENT, LLC 1.9% 5,082,342 +1% 0.01% $170,495,825
FIL Ltd 1.8% 4,667,958 +8.9% 0.12% $156,563,312
DIMENSIONAL FUND ADVISORS LP 1.4% 3,676,680 +2.3% 0.03% $123,321,966
NORGES BANK 1.3% 3,433,575 0.01% $115,162,106
Impax Asset Management Group plc 1.2% 3,208,190 0.67% $107,602,693
ALLIANCEBERNSTEIN L.P. 1.2% 3,078,999 -53% 0.03% $103,269,626
FERNBRIDGE CAPITAL MANAGEMENT LP 1.2% 3,066,841 +202% 5.1% $102,861,847
LGT Group Foundation 1.2% 3,061,289 +2.8% 1.1% $103,991,987
AQR CAPITAL MANAGEMENT LLC 1.1% 2,875,372 +352% 0.05% $96,439,970
Ninety One UK Ltd 1.1% 2,802,991 -2.3% 0.2% $94,012,302
AMERIPRISE FINANCIAL INC 1% 2,613,627 +3.1% 0.02% $87,661,046
Invesco Ltd. 0.98% 2,570,107 +11% 0.01% $86,201,401
M&G PLC 0.92% 2,405,586 -0.17% 0.43% $81,789,924
Bank of New York Mellon Corp 0.9% 2,356,548 -11% 0.01% $79,038,633
NORTHERN TRUST CORP 0.9% 2,350,923 -7.9% 0.01% $78,849,957
Robeco Schweiz AG 0.9% 2,347,104 -1.3% 1.8% $78,721,868
MORGAN STANLEY 0.89% 2,320,739 -2.5% 0% $77,837,661

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
2026 Q1 181,139,933 $5,454,759,529 -$35,931,941 $30.12 473
2025 Q4 241,475,254 $8,103,892,642 -$158,106,342 $33.54 602
2025 Q3 246,126,536 $8,216,180,579 -$113,181,361 $33.38 591
2025 Q2 249,240,102 $8,933,265,268 +$295,103,214 $35.96 581
2025 Q1 242,378,721 $7,091,066,618 +$24,988,481 $29.25 559
2024 Q4 237,165,776 $9,448,584,728 -$161,325,342 $39.84 631
2024 Q3 237,811,790 $11,214,606,811 +$7,851,111,419 $47.16 634
2024 Q2 48,309,758 $9,887,096,926 +$231,737,536 $204.48 596
2024 Q1 46,636,359 $8,615,755,036 -$71,555,028 $184.71 506
2023 Q4 47,171,610 $7,872,855,202 -$1,940,454 $166.93 505
2023 Q3 46,633,786 $7,092,827,784 +$17,997,008 $152.03 469
2023 Q2 46,872,573 $7,673,008,327 +$84,321,291 $163.74 448
2023 Q1 46,936,638 $6,886,742,404 +$74,756,338 $146.91 440
2022 Q4 46,471,935 $6,747,450,321 -$32,822,370 $145.19 464
2022 Q3 45,964,934 $5,908,292,627 -$136,005,038 $128.53 402
2022 Q2 46,191,800 $6,304,563,603 -$99,457,764 $136.55 401
2022 Q1 47,686,242 $7,867,067,308 +$152,248,597 $164.94 392
2021 Q4 46,703,352 $7,926,326,514 -$124,055,048 $169.80 389
2021 Q3 47,372,911 $7,073,314,579 +$120,416,598 $149.34 349
2021 Q2 46,548,461 $5,680,116,687 -$73,767,573 $122.04 359
2021 Q1 47,840,078 $6,473,266,661 +$25,583,161 $135.72 357
2020 Q4 46,936,862 $5,437,819,456 +$46,333,943 $115.78 357
2020 Q3 46,541,184 $4,444,481,848 +$27,204,709 $95.50 321
2020 Q2 46,268,189 $3,660,977,974 +$16,620,189 $79.12 302
2020 Q1 46,287,273 $3,269,443,610 -$66,269,236 $70.62 311
2019 Q4 47,204,686 $4,067,140,464 -$34,195,490 $86.16 333
2019 Q3 47,520,776 $4,122,618,874 -$126,512,764 $86.76 339
2019 Q2 49,058,239 $3,853,732,496 +$86,038,275 $78.55 324
2019 Q1 48,779,709 $2,906,748,046 +$7,642,300 $59.59 316
2018 Q4 48,757,123 $2,523,684,706 -$2,965,100 $51.77 321
2018 Q3 48,557,498 $3,316,177,651 -$19,127,556 $68.30 307
2018 Q2 49,155,288 $2,875,242,341 -$2,506,360 $58.50 282
2018 Q1 49,331,849 $2,414,404,354 +$19,259,757 $48.95 290
2017 Q4 48,964,262 $2,357,802,573 -$29,084,210 $48.15 295
2017 Q3 49,264,231 $2,292,938,244 -$9,747,934 $46.55 267
2017 Q2 49,753,991 $2,276,009,094 -$9,058,524 $45.75 283
2017 Q1 49,951,430 $2,040,466,123 +$318,113,059 $40.85 258
2016 Q4 49,470,648 $2,134,641,248 -$58,822,212 $43.15 273
2016 Q3 50,925,231 $1,803,134,764 -$46,659,929 $35.47 249
2016 Q2 53,073,871 $1,631,372,167 -$13,861,572 $30.74 240
2016 Q1 54,422,750 $1,621,118,783 -$18,381,012 $29.82 238
2015 Q4 55,234,876 $1,437,410,010 +$4,811,478 $26.02 235
2015 Q3 55,733,215 $1,354,847,896 -$9,002,086 $24.31 224
2015 Q2 55,985,682 $1,436,516,763 +$27,010,838 $25.64 214
2015 Q1 55,002,617 $1,325,797,951 -$11,288,458 $24.02 206
2014 Q4 55,169,664 $1,472,346,678 -$42,646,740 $26.70 209
2014 Q3 57,592,584 $1,438,636,688 -$58,990,674 $24.98 205
2014 Q2 59,682,931 $1,641,143,379 -$14,524,948 $27.50 213
2014 Q1 60,061,502 $1,773,742,490 +$6,032,820 $29.59 217
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