Ticker · CUSIP 88162G103

TTEK

TETRA TECH INC NEW

Industrials·Engineering & Construction

···Share

Holders (tracked)

Combined shares

19,119,524

Combined value

$641.27M

Last close

$31.61

Quarter

2025Q4

Price is -5.8% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$31.61+1.60 (+5.35%)H $42.54 · L $29.76 · Avg Vol 2.4M

Tracked holders · last 8 quarters

+3 vs previous quarter over the last 8.

SEC event timeline

26 events

Ken Griffin (Citadel Advisors) trimmed2026-02-17
−948,776 shares · 2025Q4
Position
D.E. Shaw & Co. added2026-02-17
+644,064 shares · 2025Q4
Position
Two Sigma Investments added2026-02-17
+144,447 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) trimmed2026-02-17
−765,697 shares · 2025Q4
Position
T. Rowe Price added2026-02-17
+18,676 shares · 2025Q4
Position
Wellington Management added2026-02-17
+2,343 shares · 2025Q4
Position
Paul Tudor Jones (Tudor Investment) opened position2026-02-17
+612,982 shares · 2025Q4
Position
AQR Capital Management added2026-02-17
+2,238,721 shares · 2025Q4
Position
Sands Capital Management trimmed2026-02-13
−172,028 shares · 2025Q4
Position
Ray Dalio (Bridgewater Associates) opened position2026-02-13
+64,301 shares · 2025Q4
Position
Renaissance Technologies added2026-02-12
+1,000 shares · 2025Q4
Position
Norges Bank (Norway SWF) opened position2026-02-10
+3,433,575 shares · 2025Q4
Position
Ken Fisher (Fisher Asset Mgmt) trimmed2026-02-09
−88,168 shares · 2025Q4
Position
Baillie Gifford & Co trimmed2026-01-23
−94,375 shares · 2025Q4
Position
Two Sigma Investments added2025-11-14
+394,091 shares · 2025Q3
Position
Wellington Management trimmed2025-11-14
−331,456 shares · 2025Q3
Position
AQR Capital Management added2025-11-14
+371,823 shares · 2025Q3
Position
Izzy Englander (Millennium Mgmt) added2025-11-14
+545,502 shares · 2025Q3
Position
T. Rowe Price added2025-11-14
+20,000 shares · 2025Q3
Position
D.E. Shaw & Co. added2025-11-14
+47,350 shares · 2025Q3
Position
Norges Bank (Norway SWF) exited2025-11-13
−2,915,542 shares · 2025Q3
Position
Renaissance Technologies added2025-11-13
+115,200 shares · 2025Q3
Position
Sands Capital Management added2025-11-13
+1,978,697 shares · 2025Q3
Position
Ken Fisher (Fisher Asset Mgmt) trimmed2025-11-12
−16,258 shares · 2025Q3
Position
Norges Bank (Norway SWF) added2025-11-12
+2,431,603 shares · 2024Q3
Position
Baillie Gifford & Co trimmed2025-10-31
−64,720 shares · 2025Q3
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for TTEK →

Follow-the-investor returns

If you'd copied each holder of TTEK…

Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
Ray Dalio (Bridgewater Associates)	2025Q4	$33.54	-5.8%	$2.0M
Ken Griffin (Citadel Advisors)	2016Q1	$33.55	-5.8%	$1.6M
Ken Griffin (Citadel Advisors)	2016Q1	$33.55	-5.8%	$1.6M
Ken Griffin (Citadel Advisors)	2016Q1	$33.55	-5.8%	$1.6M
D.E. Shaw & Co.	2016Q1	$33.59	-5.9%	$22.8M
AQR Capital Management	2016Q1	$33.68	-6.1%	$90.9M
Baillie Gifford & Co	2025Q1	$35.95	-12.1%	$13.6M
Two Sigma Investments	2016Q3	$36.01	-12.2%	$20.1M
Paul Tudor Jones (Tudor Investment)	2016Q1	$36.09	-12.4%	$19.4M
Sands Capital Management	2024Q4	$37.47	-15.6%	$221.5M
Izzy Englander (Millennium Mgmt)	2016Q3	$38.62	-18.2%	$20.7M
Renaissance Technologies	2016Q1	$39.51	-20.0%	$16.1M
T. Rowe Price	2016Q1	$44.43	-28.9%	$13.1M
Norges Bank (Norway SWF)	2016Q1	$49.22	-35.8%	$108.5M
Wellington Management	2016Q1	$50.51	-37.4%	$33.4M
Ken Fisher (Fisher Asset Mgmt)	2017Q4	$60.78	-48.0%	$19.6M

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions3

Norges Bank (Norway SWF)
+3,433,575
$115.2M
Paul Tudor Jones (Tudor Investment)
+612,982
$20.6M
Ray Dalio (Bridgewater Associates)
+64,301
$2.2M

Added to6

AQR Capital Management
+2,238,721
$75.1M
D.E. Shaw & Co.
+644,064
$21.6M
Two Sigma Investments
+144,447
$4.8M
Wellington Management
+2,343
$79K
Renaissance Technologies
+1,000
$34K
T. Rowe Price
+18,676
$626

Trimmed5

Ken Griffin (Citadel Advisors)
−948,776
$31.8M
Izzy Englander (Millennium Mgmt)
−765,697
$25.7M
Sands Capital Management
−172,028
$5.8M
Baillie Gifford & Co
−94,375
$3.2M
Ken Fisher (Fisher Asset Mgmt)
−88,168
$3.0M

Exited0

—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q1	12	10,129,116	$220.04B	—
2022Q2	13	9,047,464	$113.09B	+1
2022Q3	13	8,303,521	$1.07B	—
2022Q4	15	7,950,430	$1.15B	+2
2023Q1	13	6,994,240	$1.03B	-2
2023Q2	12	6,883,070	$1.13B	-1
2023Q3	13	6,414,460	$975.2M	+1
2023Q4	13	6,877,732	$1.15B	—
2024Q1	14	6,617,910	$1.22B	+1
2024Q2	15	6,726,279	$1.38B	+1
2024Q3	12	7,016,534	$330.9M	-3
2024Q4	11	10,504,661	$418.5M	-1
2025Q1	15	11,999,681	$351.0M	+4
2025Q2	15	15,966,263	$574.1M	—
2025Q3	13	14,110,459	$471.0M	-2
2025Q4	16	19,119,524	$641.3M	+3

Who owns TTEK

16 super-investors · 2025Q4

Tracked stake

19.12M

Combined value

$641M

% of shares outstanding

—

shares-out unknown

Quarter action mix

New3Added6Trim7

#	Manager	Shares	Value	% of book	Last action	8Q trend
1	Sands Capital Management	7.01M	$235M	0.7%	Trim−172.0K
2	Norges Bank Norway SWF	3.43M	$115M	0.0%	New+3.43M
3	AQR Capital Management	2.88M	$96M	0.1%	Added+2.24M
4	Wellington Management	1.06M	$35M	0.0%	Added+2.3K
5	D.E. Shaw & Co.	720.8K	$24M	0.0%	Added+644.1K
6	Izzy Englander Millennium Mgmt	655.5K	$22M	0.0%	Trim−765.7K
7	Two Sigma Investments	636.7K	$21M	0.0%	Added+144.4K
8	Ken Fisher Fisher Asset Mgmt	621.2K	$21M	0.0%	Trim−88.2K
9	Paul Tudor Jones Tudor Investment	613.0K	$21M	0.0%	New+613.0K
10	Renaissance Technologies	508.7K	$17M	0.0%	Added+1.0K
11	Baillie Gifford & Co	428.8K	$14M	0.0%	Trim−94.4K
12	T. Rowe Price	413.5K	$14M	0.0%	Added+18.7K
13	Ray Dalio Bridgewater Associates	64.3K	$2M	0.0%	New+64.3K	—
14	Ken Griffin Citadel Advisors	50.6K	$2M	0.0%	Trim−948.8K
15	Ken Griffin Citadel Advisors	20.7K	$694K	0.0%	Trim−948.8K
16	Ken Griffin Citadel Advisors	14.5K	$486K	0.0%	Trim−948.8K

Recent moves

20 transactions

ADDAQR Capital Management
+2,238,721 · 2025Q4
ADDT. Rowe Price
+18,676 · 2025Q4
ADDTwo Sigma Investments
+144,447 · 2025Q4
NEWPaul Tudor Jones (Tudor Investment)
+612,982 · 2025Q4
TRIMKen Griffin (Citadel Advisors)
−948,776 · 2025Q4
TRIMIzzy Englander (Millennium Mgmt)
−765,697 · 2025Q4
ADDD.E. Shaw & Co.
+644,064 · 2025Q4
ADDWellington Management
+2,343 · 2025Q4
TRIMSands Capital Management
−172,028 · 2025Q4
NEWRay Dalio (Bridgewater Associates)
+64,301 · 2025Q4
ADDRenaissance Technologies
+1,000 · 2025Q4
NEWNorges Bank (Norway SWF)
+3,433,575 · 2025Q4
TRIMKen Fisher (Fisher Asset Mgmt)
−88,168 · 2025Q4
TRIMBaillie Gifford & Co
−94,375 · 2025Q4
ADDIzzy Englander (Millennium Mgmt)
+545,502 · 2025Q3
ADDTwo Sigma Investments
+394,091 · 2025Q3
ADDD.E. Shaw & Co.
+47,350 · 2025Q3
ADDT. Rowe Price
+20,000 · 2025Q3
TRIMWellington Management
−331,456 · 2025Q3
ADDAQR Capital Management
+371,823 · 2025Q3

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