Ecovyst, Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
- Schedule I - Condensed Financial Information of Parent (Policies)
Notes Tables
Notes Details

Stock-Based Compensation - 2017 Plan (Details)

v3.10.0.1

Stock-Based Compensation - 2017 Plan (Details) - 2017 Omnibus Incentive Plan - Stock Option - USD ($) $ / shares in Units, $ in Thousands	8 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding
Beginning balance (shares)	1,738,527	2,715,170	1,798,438
Granted (shares)	538,908	241,316	1,051,496
Exercised (shares)		(15,332)	(32,366)
Forfeited and expired (shares)	(478,997)		(102,398)
Ending balance (shares)	1,798,438	2,941,154	2,715,170
Exercisable (shares)		1,629,969
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Beginning balance (weighted average exercise price, usd per share)	$ 7.80	$ 10.18	$ 7.96
Granted (weighted average exercise price, usd per share)	8.05	17.50	13.70
Exercised (weighted average exercise price, usd per share)		8.51	8.04
Forfeited and expired (weighted average exercise price, usd per share)	7.49		7.98
Ending balance (weighted average exercise price, usd per share)	$ 7.96	10.79	$ 10.18
Exercisable (weighted average exercise price, usd per share)		$ 10.19
Outstanding (weighted average contractual term)		7 years 8 months 16 days
Outstanding (aggregate intrinsic value)		$ 14,452
Exercisable (weighted average contractual term)		7 years 8 months 16 days
Exercisable (aggregate intrinsic value)		$ 8,748

- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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