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Share-based Compensation (Tables)
12 Months Ended
Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]  
Allocation of Stock-based Compensation
Our share-based compensation and ESPP expense is included in the table below.
Years Ended December 31,
In millions202220212020
Stock option expense$1.5 $1.7 $0.6 
ESPP expense0.7 0.6 0.5 
RSU, DSU and PSU expense13.9 10.0 7.3 
Total share-based compensation expense (1)
$16.1 $12.3 $8.4 
Income tax benefit(3.1)(2.3)(1.5)
Total share-based compensation expense, net of tax$13.0 $10.0 $6.9 
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(1) Amounts reflected in "Selling, general, and administrative expenses" on the consolidated statements of operations.
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques Expense related to stock options granted is based on the assumptions shown in the table below:
Years Ended December 31,
Weighted-average assumptions used to calculate expense for stock options202220212020
Risk-free interest rate1.8 %1.0 %1.0 %
Average life of options (years)6.06.56.5
Volatility40.0 %46.0 %33.5 %
Dividend yield— — — 
Fair value per stock option$28.80 $33.07 $15.87 
Disclosure of Stock-based Compensation Arrangements by Stock-based Payment Award
The following table summarizes Ingevity's stock option activity.
Number of Options
(in thousands)
Weighted-average exercise price (per share)Weighted-average remaining contractual term (years)Aggregate intrinsic value (in thousands)
Outstanding, December 31, 2021338 $61.34 6.7$5,366 
Granted74 68.23 
Exercised(33)46.79 
Forfeited(44)69.94 
Cancelled— — 
Outstanding, December 31, 2022335 $63.18 6.1$4,100 
Exercisable, December 31, 2022224 $61.94 4.9$3,568 
Schedule of Nonvested Share Activity
The following table summarizes Ingevity's RSUs, DSUs, and PSUs activity.
RSUs and DSUsPSUs
Number of Units
(in thousands) (1)
Weighted average grant date fair value (per share)
Number of Units
(in thousands) (1)
Weighted average grant date fair value (per share)
Nonvested, December 31, 2021
243 $67.36 166 $65.91 
Granted179 66.42 83 68.23 
Vested(95)71.62 — — 
Forfeited(26)63.32 (56)82.96 
Nonvested, December 31, 2022 (2)
301 $6.04 193 $61.88 
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(1) The number granted represents the number of shares issuable upon vesting of RSUs and DSUs. For PSUs, the number granted represents the number of shares issuable upon vesting, assuming that Ingevity performs at the target performance level in each year of the three-year performance period.
(2) Excludes 5,715 non-employee director shares that were vested but unissued at December 31, 2022.