ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

Position in CECO — Ceco Environmental Corp

CIK 1164508 BOSTON, MA

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Position in CECO

as of Jun 30, 2026 · filed Aug 13, 2026 Compact

Position Value

$51,584,238

+$44,718,120 QoQ

Shares Held

568,484

+393.3% QoQ

Ownership

0.971%

of shares outstanding

% of Portfolio

0.02%

of 13F equity value

Holder Rank

#24

of 341 holders

Holding Since

Mar 2020

24 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in CECO Over Time

Shares Held

Position Value (USD)

Position in Pollution & Treatment Controls

Industrials · as of Jun 30, 2026

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP holds $73,977,062 across 2 Pollution & Treatment Controls names. CECO ranks #1 (69.7% of the industry book) .

#	Ticker	Company	Shares	Value (USD)	Open
1	CECO	Ceco Environmental Corp This page	568,484	$51,584,238
2	ZWS	Zurn Elkay Water Solutions Corp	443,159	$22,392,824

All Filings in CECO

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24 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$51,584,238	568,484	+393.3%	Shares	Defined	2026-08-13
2026-03-31	$6,866,118	115,242	+310.6%	Shares	Defined	2026-05-14
2025-12-31	$1,679,929	28,069	+80.7%	Shares	Defined	2026-02-13
2025-03-31	$354,106	15,531	-84.5%	Shares	Defined	2025-05-14
2024-12-31	$3,032,371	100,310	-77.4%	Shares	Defined	2025-02-12
2024-09-30	$12,530,698	444,351	+0.5%	Shares	Defined	2024-11-14
2024-06-30	$12,752,334	442,022	+4.9%	Shares	Defined	2024-08-14
2024-03-31	$9,703,413	421,521	+30.6%	Shares	Defined	2024-05-15
2023-12-31	$6,543,605	322,663	+66.7%	Shares	Defined	2024-02-14
2023-09-30	$3,091,823	193,602	-57.8%	Shares	Defined	2023-11-14
2023-06-30	$6,130,904	458,900	-14.7%	Shares	Defined	2023-08-14
2023-03-31	$7,527,949	538,095	+52.3%	Shares	Defined	2023-05-15
2022-12-31	$4,127,583	353,389	+4.5%	Shares	Defined	2023-02-14
2022-09-30	$2,993,778	338,280	+68.8%	Shares	Defined	2022-11-14
2022-06-30	$1,198,182	200,365	+237.0%	Shares	Defined	2022-08-15
2022-03-31	$326,402	59,454	+36.0%	Shares	Defined	2022-05-13
2021-12-31	$272,263	43,702	-43.8%	Shares	Defined	2022-02-14
2021-09-30	$547,352	77,749	-48.2%	Shares	Defined	2021-11-12
2021-06-30	$1,075,575	150,220	-12.6%	Shares	Defined	2021-08-13
2021-03-31	$1,363,206	171,905	-12.7%	Shares	Defined	2021-05-14
2020-12-31	$1,370,618	196,928	-15.8%	Shares	Defined	2021-02-12
2020-09-30	$1,705,393	233,936	0.0%	Shares	Defined	2020-11-12
2020-06-30	$1,541,638	233,936	-2.2%	Shares	Defined	2020-08-12
2020-03-31	$1,117,045	239,196	—	Shares	Defined	2020-05-15
No filing history on record for this holder in this stock.