BlackRock, Inc.

Position in TTEK — Tetra Tech Inc

CIK 2012383 New York, NY

Position in TTEK

as of Mar 31, 2026 · filed May 13, 2026 Compact

Position Value

$806,927,019

-$56,111,809 QoQ

Shares Held

26,790,406

+4.1% QoQ

Ownership

10.3%

of shares outstanding

% of Portfolio

0.02%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Sep 2024

7 quarters on record

Voting authority Sole 95.78448717798453.ToString("F0")% Shared 0.ToString("F0")% None 4.215512822015463.ToString("F0")%

Industrials · as of Mar 31, 2026

BlackRock, Inc. holds $35,772,382,858 across 43 Engineering & Construction names. TTEK ranks #15 (2.3% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	PWR	Quanta Services, Inc.	14,050,547	$7,714,031,301
2	FIX	Comfort Systems USA Inc	3,512,927	$4,844,291,193
3	EME	EMCOR Group, Inc.	4,108,185	$3,033,114,058
4	MTZ	Mastec Inc	7,309,609	$2,351,793,590
5	STRL	Sterling Infrastructure, Inc.	3,984,283	$1,622,678,927
6	APG	APi Group Corp	34,354,093	$1,392,027,841
7	ACM	Aecom	15,760,364	$1,336,794,064
8	J	Jacobs Solutions Inc.	10,488,712	$1,335,003,252

8 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$806,927,019	26,790,406	+4.1%	Shares	Sole	2026-05-13
2025-12-31	$863,038,828	25,731,629	+0.9%	Shares	Sole	2026-02-12
2025-09-30	$851,390,840	25,506,017	-0.7%	Shares	Sole	2025-11-12
2025-06-30	$924,009,920	25,695,493	-2.8%	Shares	Sole	2025-08-12
2025-03-31	$773,354,725	26,439,478	+1.6%	Shares	Sole	2025-05-02
2024-12-31	$1,036,906,636	26,026,773	-0.0%	Shares	Sole	2025-02-06
2024-12-31	$1,036,906,668	26,026,774	-0.7%	Shares	Sole	2025-02-07
2024-09-30	$1,236,274,727	26,214,477	—	Shares	Sole	2024-11-13
No filing history on record for this holder in this stock.