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Tetra Tech
TTEK

Name Holding Trade Value Shares
Change 		Change in
Stake
Vanguard Group
1
Vanguard Group
Pennsylvania
$85.8M +$96.8M +18,241,645 New
Fidelity Investments
2
Fidelity Investments
Massachusetts
$82.3M +$92.9M +17,506,500 New
BFA
3
BlackRock Fund Advisors
California
$76.2M +$86M +16,200,275 New
PAMU
4
Pictet Asset Management (UK)
United Kingdom
$70.1M +$79.1M +14,909,280 New
WA
5
Wasatch Advisors
Utah
$68.9M +$77.7M +14,645,880 New
Invesco
6
Invesco
Georgia
$66.9M +$75.6M +14,237,650 New
Artisan Partners
7
Artisan Partners
Wisconsin
$48.4M +$54.6M +10,287,500 New
BIT
8
BlackRock Institutional Trust
California
$40.9M +$46.2M +8,698,650 New
CI
9
Cambiar Investors
Colorado
$38.8M +$43.9M +8,261,485 New
FAM
10
Fred Alger Management
New York
$35M +$39.5M +7,446,425 New
State Street
11
State Street
Massachusetts
$33.9M +$38.3M +7,212,635 New
PIM
12
Perkins Investment Management
Illinois
$32.2M +$36.4M +6,855,500 New
Norges Bank
13
Norges Bank
Norway
$31.7M +$35.8M +6,751,425 New
IAMU
14
Impax Asset Management (UK)
United Kingdom
$30.1M +$34M +6,399,300 New
LI
15
LMCG Investments
Massachusetts
$27.4M +$31M +5,835,745 New
Dimensional Fund Advisors
16
Dimensional Fund Advisors
Texas
$27.1M +$30.6M +5,772,700 New
RA
17
Royce & Associates
New York
$27.1M +$30.6M +5,768,575 New
RS
18
Robeco Schweiz
Switzerland
$25.4M +$28.4M +5,359,500 New
Northern Trust
19
Northern Trust
Illinois
$24.4M +$27.6M +5,194,180 New
WAM
20
Water Asset Management
New York
$22.6M +$25.6M +4,814,910 New
Neuberger Berman Group
21
Neuberger Berman Group
New York
$22M +$24.8M +4,673,620 New
TAM
22
Third Avenue Management
New York
$21.8M +$24.6M +4,635,990 New
1IC
23
1919 Investment Counsel
Maryland
$20.5M +$23.1M +4,349,400 New
Bank of New York Mellon
24
Bank of New York Mellon
New York
$18.6M +$21M +3,965,410 New
BAMCO Inc
25
BAMCO Inc
New York
$15.2M +$17.2M +3,241,000 New
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