Robeco Schweiz AG

Position in TTEK — Tetra Tech Inc

CIK 1418427 ZURICH, V8

Position in TTEK

as of Jun 30, 2026 · filed Jul 28, 2026 Compact

Position Value

$89,537,332

+$20,645,362 QoQ

Shares Held

3,099,250

+35.5% QoQ

Ownership

1.21%

of shares outstanding

% of Portfolio

1.44%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2023

14 quarters on record

Voting authority Sole 98% Shared 0% None 2%

Industrials · as of Jun 30, 2026

Robeco Schweiz AG holds $502,454,276 across 7 Engineering & Construction names. TTEK ranks #2 (17.8% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	PWR	Quanta Services, Inc.	326,449	$235,056,337
2	TTEK	Tetra Tech Inc This page	3,099,250	$89,537,332
3	EME	EMCOR Group, Inc.	65,460	$54,323,944
4	J	Jacobs Solutions Inc.	303,571	$38,249,946
5	APG	APi Group Corp	891,999	$37,776,157
6	ACM	Aecom	345,638	$24,125,532
7	FIX	Comfort Systems USA Inc	11,799	$23,385,028

14 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$89,537,332	3,099,250	+35.5%	Shares	Sole	2026-07-28
2026-03-31	$68,891,970	2,287,250	-2.6%	Shares	Sole	2026-05-07
2025-12-31	$78,721,868	2,347,104	-1.3%	Shares	Sole	2026-02-03
2025-09-30	$79,411,687	2,379,020	-15.0%	Shares	Defined	2025-10-27
2025-06-30	$100,613,706	2,797,934	-12.3%	Shares	Defined	2025-08-07
2025-03-31	$93,369,393	3,192,116	+30.3%	Shares	Defined	2025-04-30
2024-12-31	$97,603,020	2,449,875	+26.5%	Shares	Defined	2025-02-05
2024-09-30	$91,346,279	1,936,944	+501.3%	Shares	Defined	2024-11-04
2024-06-30	$65,863,212	322,101	+7.6%	Shares	Defined	2024-08-08
2024-03-31	$55,300,142	299,389	+26.5%	Shares	Defined	2024-04-25
2023-12-31	$39,510,661	236,690	-0.4%	Shares	Defined	2024-02-14
2023-09-30	$36,142,547	237,733	+5.9%	Shares	Defined	2023-11-08
2023-06-30	$36,740,963	224,386	-10.2%	Shares	Defined	2023-08-14
2023-03-31	$36,702,819	249,832	—	Shares	Defined	2023-05-08
No filing history on record for this holder in this stock.