BlackRock, Inc.

Position in TTEK — Tetra Tech Inc

CIK 2012383 New York, NY

Position in TTEK

as of Jun 30, 2026 · filed Aug 7, 2026 Compact

Position Value

$828,428,715

+$21,501,696 QoQ

Shares Held

28,675,276

+7.0% QoQ

Ownership

11.2%

of shares outstanding

% of Portfolio

0.01%

of 13F equity value

Holder Rank

of 543 holders

Holding Since

Sep 2024

8 quarters on record

Voting authority Sole 95% Shared 0% None 5%

Industrials · as of Jun 30, 2026

BlackRock, Inc. holds $42,619,754,294 across 42 Engineering & Construction names. TTEK ranks #16 (1.9% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	PWR	Quanta Services, Inc.	13,061,264	$9,404,632,521
2	FIX	Comfort Systems USA Inc	3,397,683	$6,734,037,811
3	EME	EMCOR Group, Inc.	4,116,754	$3,416,411,801
4	MTZ	Mastec Inc	7,638,487	$3,178,068,892
5	STRL	Sterling Infrastructure, Inc.	3,233,353	$2,713,947,165
6	AGX	Argan Inc	2,209,112	$1,764,086,380
7	APG	APi Group Corp	36,185,639	$1,532,461,803
8	DY	Dycom Industries Inc	2,993,578	$1,513,523,093

9 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$828,428,715	28,675,276	+7.0%	Shares	Sole	2026-08-07
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	—	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.