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

Quarterly report [Sections 13 or 15(d)]

Acquisitions - Preliminary Allocation Off the Purchase Price (Details)

Acquisitions - Preliminary Allocation Off the Purchase Price (Details) - USD ($) $ in Thousands					3 Months Ended	9 Months Ended
	Sep. 30, 2026	Jun. 30, 2026	Jun. 29, 2026	May 06, 2025	Sep. 30, 2026	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Business Combination
Cash paid, net of cash acquired						$ 178,533	$ 41,315
Recognized amounts of identifiable net assets acquired:
Goodwill	$ 399,544				$ 399,544	399,544		$ 326,744
Calabrian
Business Combination
Cash paid, net of cash acquired	179,519		$ 178,533
Adjustments, Cash paid, net of cash acquired					986
Recognized amounts of identifiable net assets acquired:
Accounts receivable	13,997		13,997		13,997	13,997
Inventories	2,897		2,525		2,897	2,897
Adjustments, Inventories					372
Property, plant and equipment	50,163		44,955		50,163	50,163
Adjustments, Property, Plant, and Equipment					5,208
Right-of-use lease assets	7,374		8,287		7,374	7,374
Adjustments, Right-of-use lease assets					(913)
Other intangible assets	75,500		81,600		75,500	75,500
Adjustments, Other intangibles assets					(6,100)
Other long-term assets	107		107		107	107
Fair value of assets acquired	150,038		151,471		150,038	150,038
Adjustments, Fair value of assets acquired					(1,433)
Accounts payable	5,516		5,516		5,516	5,516
Accrued liabilities	1,658		1,658		1,658	1,658
Operating lease liabilities—current	1,756		2,000		1,756	1,756
Adjustments, Operating lease liabilities—current					(244)
Deferred income taxes	28,713		28,911		28,713	28,713
Adjustment, Deferred income taxes					(198)
Operating lease liabilities—noncurrent	5,708		6,377		5,708	5,708
Adjustments, Operating lease liabilities—noncurrent					(669)
Fair value of identifiable net assets acquired	106,687		107,009		106,687	106,687
Adjustments, Fair value of identifiable net assets acquired					(322)
Goodwill	72,832		71,524		72,832	72,832
Adjustments, Goodwill					1,308
Total purchase price allocated	$ 179,519		$ 178,533		179,519	$ 179,519
Adjustments, Total purchase price allocated					$ 986
Cornerstone Chemical Company LLC
Business Combination
Cash paid, net of cash acquired		$ 183,286		$ 41,480
Recognized amounts of identifiable net assets acquired:
Accounts receivable				9,991
Inventories				3,259
Property, plant and equipment				25,000
Other intangible assets				2,380
Other long-term assets				695
Fair value of assets acquired				41,325
Goodwill				155
Total purchase price allocated				$ 41,480