BRIDGEWAY CAPITAL MANAGEMENT, LLC

Position in ECVT — Ecovyst Inc.

CIK 1107261 HOUSTON, TX

Position in ECVT

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$10,735,437

+$2,868,275 QoQ

Shares Held

834,793

+3.2% QoQ

Ownership

0.763%

of shares outstanding

% of Portfolio

0.22%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Sep 2021

10 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Basic Materials · as of Mar 31, 2026

BRIDGEWAY CAPITAL MANAGEMENT, LLC holds $44,392,841 across 17 Specialty Chemicals names. ECVT ranks #1 (24.2% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ECVT	Ecovyst Inc. This page	834,793	$10,735,437
2	SCL	Stepan Co	152,579	$7,625,898
3	KOP	Koppers Holdings Inc.	147,526	$5,706,305
4	MATV	Mativ Holdings, Inc.	527,229	$4,586,892
5	HDSN	Hudson Technologies Inc /Ny	498,109	$2,928,880
6	CMT	Core Molding Technologies Inc	108,368	$2,427,443
7	ALTO	Alto Ingredients, Inc.	488,047	$2,362,147
8	LIN	Linde PLC	3,860	$1,913,633

10 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$10,735,437	834,793	+3.2%	Shares	Sole	2026-05-15
2025-12-31	$7,867,162	808,547	+13.9%	Shares	Sole	2026-02-17
2025-09-30	$6,220,467	710,099	+6.7%	Shares	Sole	2025-11-14
2025-06-30	$5,475,172	665,270	+7.5%	Shares	Sole	2025-08-14
2025-03-31	$3,837,986	619,030	+31.7%	Shares	Sole	2025-05-15
2024-12-31	$3,591,403	470,079	+3.4%	Shares	Sole	2025-02-14
2024-09-30	$3,114,051	454,606	+390.4%	Shares	Sole	2024-11-14
2022-03-31	$1,071,612	92,700	-84.1%	Shares	Sole	2022-05-16
2021-12-31	$5,966,848	582,700	0.0%	Shares	Sole	2022-02-14
2021-09-30	$6,794,282	582,700	—	Shares	Sole	2021-11-15
No filing history on record for this holder in this stock.