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STOCK-BASED COMPENSATION (Tables)
12 Months Ended
Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]  
Weighted-average assumptions used to estimate fair value of restricted stock units Inputs and assumptions used to calculate the fair value are shown in the table below. The fair value of these RSUs is expensed over the vesting period using the straight-line method or using the graded vesting method when an employee becomes eligible to retain the award at retirement.
Year Ended December 31,2023(1)20222021
Fair value per stock award$116.17 $141.95 $171.63 
Grant date stock price$111.38 $114.52 $141.59 
Assumptions:
Aptar's stock price expected volatility20.00 %20.20 %21.40 %
Expected average volatility of peer companies39.70 %41.70 %50.00 %
Correlation assumption33.30 %41.20 %58.10 %
Risk-free interest rate3.83 %2.04 %0.32 %
Dividend yield assumption1.36 %1.33 %1.02 %
(1)The 2023 award inputs and assumptions are related to PSU-ROIC awards with a TSR modifier.
Summary of restricted stock unit activity
A summary of RSU activity as of December 31, 2023, and changes during the period then ended is presented below:
Time-Based RSUsPerformance-Based RSUs
UnitsWeighted Average
Grant-Date Fair Value
UnitsWeighted Average
Grant-Date Fair Value
Nonvested at January 1, 2023
426,361$111.60 610,871$118.77 
Granted123,657110.55 151,499115.69 
Vested(193,820)105.00 (99,182)89.33 
Forfeited(20,324)111.17 (148,805)96.24 
Nonvested at December 31, 2023335,874$115.15 514,383$130.10 
Schedule of compensation expense, fair value, and intrinsic value related to RSU's
Year Ended December 31,202320222021
Compensation expense$37,015 $40,937 $38,643 
Fair value of units vested29,100 32,013 32,414 
Intrinsic value of units vested33,914 33,024 42,970 
Schedule of share-based payment award, stock options, valuation assumptions These values were estimated on the respective dates of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions:
Stock Award Plans:
Year Ended December 31,2023
Dividend Yield1.41 %
Expected Stock Price Volatility16.55 %
Risk-free Interest Rate3.57 %
Expected Life of Option (years)7.0
Summary of option activity
A summary of option activity under our stock plans as of December 31, 2023, and changes during the period then ended is presented below:
Stock Awards PlansDirector Stock Option Plans
OptionsWeighted Average
Exercise Price
OptionsWeighted Average
Exercise Price
Outstanding, January 1, 2023
2,623,944 $73.34 51,700 $63.91 
Granted315,005 116.19   
Exercised(749,899)69.94 (32,700)62.36 
Forfeited or expired(6,266)93.23   
Outstanding at December 31, 20232,182,784 $80.63 19,000 $66.59 
Exercisable at December 31, 20231,871,178 $74.70 19,000 $66.59 
Weighted-Average Remaining Contractual Term (Years):
Outstanding at December 31, 20233.50.4
Exercisable at December 31, 20232.60.4
Aggregate Intrinsic Value:
Outstanding at December 31, 2023$93,830 $1,084 
Exercisable at December 31, 2023$91,533 $1,084 
Intrinsic Value of Options Exercised During the Years Ended:
December 31, 2023$38,706 $1,978 
December 31, 2022$20,608 $— 
December 31, 2021$69,862 $4,248 
Schedule of compensation expense, and fair value related to options
Year Ended December 31,202320222021
Compensation expense (included in SG&A)$3,929 $— $185 
Compensation expense (included in Cost of sales)349 — 42 
Compensation expense, Total$4,278 $— $227 
Compensation expense, net of tax4,278 — 174 
Grant date fair value of options vested2,663 — 2,421