Ecovyst, Inc. Quarterly report [Sections 13 or 15(d)]

Quarterly report [Sections 13 or 15(d)]

Cover
- Cover Page
Financial Statements
Notes to Financial Statements
Accounting Policies
- Background and Basis of Presentation (Policies)
Notes Tables
Notes Details

Stockholders' Equity - Narrative (Details)

v3.25.3

Stockholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended		9 Months Ended
	Oct. 30, 2025	Apr. 27, 2022	Mar. 31, 2025	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Equity, Class of Treasury Stock [Line Items]
Repurchases of common shares value					$ 240,902		$ 222,826
Accrued excise tax on share repurchases (Note 6)					193	$ 0
Remaining authorized repurchase amount					$ 202,207
Shares withheld for tax withholding obligation (in shares)					189,446	128,801
Fair value of shares withheld for tax payments			$ 1,477	$ 1,218	$ 1,477	$ 1,218
Stock Repurchase Program 2022
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount		$ 450,000
Stock repurchase program, period (in years)		4 years
Shares acquired (in shares)					3,536,364	552,081
Average cost per share (in dollars per share)					$ 7.74	$ 9.05
Repurchases of common shares value					$ 27,387	$ 4,998
Accrued excise tax on share repurchases (Note 6)					$ 193	$ 0
Stock Repurchase Program 2022 \| Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, period (in years)	4 years

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