TTEK | Tetra Tech | Owners

S&P 500$7,623.68
-0.52%
2m
DOW 30$52,215.16
-1.23%
2m
NASDAQ 100$28,957.53
-0.004%
2m
Russell 2000$275.75
-0.33%
2m
Russell 1000$415.35
-0.46%
2m
S&P 400$3,616.59
-0.56%
2m
S&P 600$1,681.71
-0.29%
2m

Tetra Tech (TTEK)

NASDAQ

$36.98$0.00 (0.00%)

Price as of Oct 23, 2026 7:30 PM EDT

$9.4B
Market Cap
10.37%
1-Year Change
Engineering & Construction
Industry

Top Holders

Institutional

Mutual Funds

Holder	Ownership %	Shares Held	Change (Shares, %)	Report Date
BLACKROCK, INC.	11.20%	28.7M	+1.9M (+6.57%)	Jun 30, 2026
BLACKROCK FUNDING, INC. /DE	10.16%	26.0M	-187,703 (-0.72%)	Dec 31, 2024
VANGUARD GROUP INC	10.08%	25.8M	-501,178 (-1.94%)	Dec 31, 2025
VANGUARD PORTFOLIO MANAGEMENT LLC	4.87%	12.5M	-175,124 (-1.40%)	Jun 30, 2026
N/A	4.87%	12.5M	-175,124 (-1.40%)	Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC	4.58%	11.7M	+16,587 (+0.14%)	Jun 30, 2026
CAPITAL INTERNATIONAL INVESTORS	4.55%	11.7M	+265,971 (+2.28%)	Jun 30, 2026

Holder	Ownership %	Shares Held	Change (Shares, %)	Report Date
VANGUARD INDEX FUNDS	8.18%	21.0M	-104,156 (-0.50%)	Jun 30, 2026
NEW PERSPECTIVE FUND	1.59%	4.1M	0 (0.00%)	Jun 30, 2026
INVESCO EXCHANGE-TRADED FUND TRUST	1.41%	3.6M	+1.1M (+29.38%)	Jul 31, 2026
SMALLCAP WORLD FUND INC	1.36%	3.5M	+175,067 (+5.03%)	Jun 30, 2026
FIDELITY DEVONSHIRE TRUST	1.18%	3.0M	+3.0M (+100.00%)	Jul 31, 2026
AMERICAN FUNDS INSURANCE SERIES	0.89%	2.3M	-17,612 (-0.77%)	Jun 30, 2026
SPDR S&P MIDCAP 400 ETF TRUST	0.78%	2.0M	+31,044 (+1.55%)	Jun 30, 2026

Current Ownership Distribution

Institutions2.5B (74.27%)
Mutual Funds855.0M (25.67%)
Insiders1.9M (0.06%)
Other0 (0.00%)

Insider Transactions

0.06% (1.9M)
Current InsiderOwnership (%, shares)
0
Number of InsiderBuying (last 12 months)
$0.00
Amount of InsiderBuying (last 12 months)
1
Number of InsiderSelling (last 12 months)
$1.5M
Amount of InsiderSelling (last 12 months)

Insider Name & Title	Type	Date	Transaction Value	Shares	Share Price	Shares After Transactions
Volpi Kirsten M	Exempt	Aug 04, 2026	$0.00	2,300	$0.00	4,000
Volpi Kirsten M	Exempt	Aug 04, 2026	$22,057.00	2,300	$9.59	74,218
Ritrievi Kimberly E	Exempt	Mar 16, 2026	$0.00	4,500	$0.00	0
Ritrievi Kimberly E	Exempt	Mar 16, 2026	$0.00	2,250	$0.00	2,250
Ritrievi Kimberly E	Exempt	Mar 16, 2026	$0.00	1,925	$0.00	1,925
Ritrievi Kimberly E	Exempt	Mar 16, 2026	$0.00	2,910	$0.00	0
Ritrievi Kimberly E	Exempt	Mar 16, 2026	$0.00	2,050	$0.00	0
Ritrievi Kimberly E	Exempt	Mar 16, 2026	$0.00	795	$0.00	0
Ritrievi Kimberly E	Exempt	Mar 16, 2026	$0.00	795	$0.00	0
Ritrievi Kimberly E	Exempt	Mar 16, 2026	$0.00	1,900	$0.00	0
Ritrievi Kimberly E	Exempt	Mar 16, 2026	$0.00	2,125	$0.00	0
Ritrievi Kimberly E	Exempt	Mar 16, 2026	$0.00	1,718	$0.00	0
Ritrievi Kimberly E	Exempt	Mar 16, 2026	$0.00	4,500	$0.00	149,908
Ritrievi Kimberly E	Exempt	Mar 16, 2026	$0.00	2,250	$0.00	152,158
Ritrievi Kimberly E	Exempt	Mar 16, 2026	$0.00	1,925	$0.00	154,083
Ritrievi Kimberly E	Exempt	Mar 16, 2026	$0.00	2,910	$0.00	156,993
Ritrievi Kimberly E	Exempt	Mar 16, 2026	$0.00	2,050	$0.00	159,043
Ritrievi Kimberly E	Exempt	Mar 16, 2026	$0.00	795	$0.00	159,838
Ritrievi Kimberly E	Exempt	Mar 16, 2026	$0.00	795	$0.00	160,633
Ritrievi Kimberly E	Exempt	Mar 16, 2026	$0.00	1,900	$0.00	162,533
Ritrievi Kimberly E	Exempt	Mar 16, 2026	$0.00	2,125	$0.00	164,658
Ritrievi Kimberly E	Exempt	Mar 16, 2026	$0.00	1,718	$0.00	166,376
Ritrievi Kimberly E	Award	Mar 16, 2026	$0.00	25,883	$0.00	192,259
Obiaya Christiana	Exempt	Feb 19, 2026	$0.00	495	$0.00	0
Obiaya Christiana	Exempt	Feb 19, 2026	$0.00	495	$0.00	9,666
Volpi Kirsten M	Exempt	Feb 10, 2026	$0.00	1,000	$0.00	8,000
Volpi Kirsten M	Exempt	Feb 10, 2026	$9,590.00	1,000	$9.59	70,218
BURDICK STEVEN M EVP, CFO	Gift	Feb 06, 2026	$0.00	11,100	$0.00	138,251
CARTER BRIAN N SVP, Corporate Controller	Sell	Feb 04, 2026	$401,405.28	9,979	$40.23	46,496
Feeler Jeffrey R	Award	Jan 26, 2026	$0.00	1,754	$0.00	1,754