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Share-Based Compensation | 12 Months Ended
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Dec. 31, 2024
Share-Based Payment Arrangement [Abstract] |
Share-Based Compensation | Share-Based Compensation The Company maintains two share-based compensation plans for executives, non-employee directors and certain key employees that authorize the granting of restricted stock, performance share units and stock options and other types of awards consistent with the purpose of the plans. The number of shares authorized for issuance under the Company’s plans as of December 31, 2024 totaled 9.9 million, of which 9.7 million shares were available for future issuance. The Company typically grants equity awards annually at its regularly scheduled first quarter meeting of the Board of Directors based on the recommendation from the Compensation Committee. The Company’s policy is to recognize compensation cost on a straight-line basis, assuming forfeitures, over the requisite service period for the entire award. Classification of share-based compensation cost within the Consolidated Statements of Income is consistent with the classification of cash compensation for the same employees. Stock Options Stock options granted under the Company’s plans are generally non-qualified and are granted with an exercise price equal to the market price of the Company’s stock on the date of grant. The fair value of each option grant was estimated on the date of the grant using the Black Scholes valuation model. Stock options generally vest ratably over four years, with vesting beginning one year from the date of grant, and generally expire 10 years from the date of grant. The service period for certain retiree eligible participants is accelerated. Weighted average stock option fair values and assumptions for the years ended December 31, 2024, 2023 and 2022 are disclosed below:
| Years Ended December 31,
| 2024 |  | 2023 |  | 2022
Weighted average fair value of grants | $63.61 |  | $59.77 |  | $42.66
Dividend yield | 1.09% |  | 1.09% |  | 1.14%
Volatility | 26.66% |  | 27.14% |  | 25.23%
Risk-free interest rate | 4.31% |  | 4.15% |  | 2.01%
Expected life (in years) | 4.60 |  | 4.50 |  | 4.90
The assumptions were determined as follows: •The Company estimated volatility using its historical share price performance over the expected life of the option. •The Company uses historical data to estimate the expected life of the option based on IDEX’s own exercise and cancellation history adjusted for current vesting schedules. •The risk-free interest rate is based on the U.S. Treasury yield curve commensurate with the expected life of the option. The Company presents the spot rate used in the Black Scholes valuation model. •The expected dividend yield is based on the Company’s current dividend yield as the best estimate of projected dividend yield for periods within the contractual life of the option. A summary of the Company’s stock option activity as of December 31, 2024, and changes during the year ended December 31, 2024, are presented in the following table:
| Shares |  | Weighted Average Exercise Price |  | Weighted-Average Remaining Contractual Term (years) |  | Aggregate Intrinsic Value
Stock Options |  |  |  |  |  |  |
Outstanding at January 1, 2024 | 983,267 |  |  | $ | 178.86 |  |  | 6.88 |  | $ | 39.3 |
Granted | 196,870 |  |  | 234.55 |  |  |  |  |
Exercised | (128,164) |  |  | 151.50 |  |  |  |  |
Forfeited | (53,117) |  |  | 204.95 |  |  |  |  |
Outstanding at December 31, 2024 | 998,856 |  |  | $ | 191.96 |  |  | 6.63 |  | $ | 24.9 |
Vested and expected to vest at December 31, 2024 | 969,789 |  |  | $ | 191.03 |  |  | 6.57 |  | $ | 24.8 |
Exercisable at December 31, 2024 | 556,562 |  |  | $ | 170.62 |  |  | 5.35 |  | $ | 22.5 |
The intrinsic value for stock options outstanding and exercisable is defined as the difference between the market value of the Company’s common stock as of the end of the period and the grant price. The total intrinsic value of options exercised in 2024, 2023 and 2022 was $9.6 million, $14.9 million and $17.4 million, respectively. In 2024, 2023 and 2022, cash received from options exercised was $19.4 million, $26.3 million and $19.3 million, respectively, while the actual tax benefit realized for the tax deductions from stock options exercised totaled $2.0 million, $3.1 million and $3.7 million, respectively. As of December 31, 2024, there was $9.6 million of total unrecognized compensation cost related to stock options that is expected to be recognized over a weighted-average period of 1.4 years. Restricted Stock Restricted stock awards generally cliff vest after three years for employees and non-employee directors. The service period for certain retiree eligible participants is accelerated. Unvested restricted stock granted prior to the adoption of the 2024 Incentive Award Plan earn and are paid dividends. Unvested restricted stock granted after the adoption of the 2024 Incentive Award Plan earn dividend equivalents for the award period, which will be paid to the participants upon vesting of the underlying awards. The sale of the shares is restricted prior to the date of vesting. The fair value of restricted stock is equal to the market price of the Company’s stock at the date of the grant. A summary of the Company’s restricted stock activity as of December 31, 2024, and changes during the year ended December 31, 2024, are presented in the following table:
Restricted Stock | Shares |  | Weighted-Average Grant Date Fair Value
Unvested at January 1, 2024 | 112,891 |  |  | $ | 193.03 |
Granted | 103,070 |  |  | 211.90 |
Vested | (24,275) |  |  | 201.61 |
Forfeited | (15,695) |  |  | 211.29 |
Unvested at December 31, 2024 | 175,991 |  |  | $ | 201.27 |
As of December 31, 2024, there was $15.4 million of total unrecognized compensation cost related to restricted stock that is expected to be recognized over a weighted-average period of 1.1 years. Cash-Settled Restricted Stock The Company also maintains a cash-settled share-based compensation plan for certain employees. Cash-settled restricted stock awards generally cliff vest after three years. The service period for certain retiree eligible participants is accelerated. Cash-settled restricted stock awards are recorded at fair value on a quarterly basis using the market price of the Company’s stock on the last day of the quarter. At December 31, 2024 and 2023, the Company has accrued $4.0 million and $4.2 million, respectively, for cash-settled restricted stock in Accrued expenses in the Consolidated Balance Sheets and has accrued $2.4 million and $2.9 million, respectively, for cash-settled restricted stock in Other noncurrent liabilities in the Consolidated Balance Sheets. These recurring fair value measurements are classified as Level 1 in the fair value hierarchy. Dividend equivalents are paid on certain cash-settled restricted stock awards granted prior to the adoption of the 2024 Incentive Award Plan. Dividend equivalents are earned throughout the award period and paid upon vesting of the underlying award for certain cash-settled restricted stock awards granted after the adoption of the 2024 Incentive Award Plan. A summary of the Company’s unvested cash-settled restricted stock activity as of December 31, 2024, and changes during the year ended December 31, 2024, are presented in the following table:
Cash-Settled Restricted Stock | Shares |  | Weighted-Average Fair Value
Unvested at January 1, 2024 | 56,655 |  |  | $ | 217.11 |
Granted | 23,655 |  |  | 229.79 |
Vested | (17,230) |  |  | 234.02 |
Forfeited | (7,685) |  |  | 209.29 |
Unvested at December 31, 2024 | 55,395 |  |  | $ | 209.29 |
As of December 31, 2024, there was $4.0 million of total unrecognized compensation cost related to cash-settled restricted stock that is expected to be recognized over a weighted-average period of 1.0 year. Performance Share Units Beginning in 2013, the Company granted performance share units to selected key employees that may be earned based on IDEX total shareholder return over the three-year period following the date of grant. Performance share units are expected to be made annually and are paid out at the end of a three-year period based on the Company’s performance. Performance is measured by determining the percentile rank of the total shareholder return of IDEX common stock in relation to the total shareholder return of companies in the S&P 500 Index for the three-year period following the date of grant. The payment of awards following the three-year award period will be based on performance achieved in accordance with the scale set forth in the plan agreement and may range from 0 percent to 250 percent of the initial grant. A target payout of 100 percent is earned if total shareholder return is equal to the 50 th percentile of the peer group. Performance share units earn dividend equivalents for the award period, which will be paid to participants with the award payout at the end of the period based on the actual number of performance share units that are earned. Payments made at the end of the award period will be in the form of stock for performance share units and will be in cash for dividend equivalents. The performance share units are market condition awards, which are assessed at fair value on the date of grant using a Monte Carlo simulation model and are expensed ratably over the three-year term of the awards. Weighted average performance share unit fair values and assumptions for the years ended December 31, 2024, 2023 and 2022 are disclosed below:
| Years Ended December 31,
| 2024 |  | 2023 |  | 2022
Weighted average fair value of grants | $349.59 |  | $308.18 |  | $235.54
Dividend yield | —% |  | —% |  | —%
Volatility | 22.23% |  | 27.00% |  | 28.09%
Risk-free interest rate | 4.45% |  | 4.37% |  | 1.73%
Expected life (in years) | 2.94 |  | 2.94 |  | 2.93
The assumptions were determined as follows: •The Company estimated volatility using its historical share price performance over the remaining performance period as of the grant date. •The Company uses a Monte Carlo simulation model that uses an expected life commensurate with the performance period. As a result, the expected life of the performance share units was assumed to be the period from the grant date to the end of the performance period. •The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant with a term commensurate with the remaining performance period. •Total Shareholder Return is determined assuming that dividends are reinvested in the issuing entity over the performance period, which is mathematically equivalent to utilizing a 0% dividend yield. A summary of the Company’s performance share unit activity as of December 31, 2024, and changes during the year ended December 31, 2024, are presented in the following table:
Performance Share Units | Shares |  | Weighted-Average Grant Date Fair Value
Unvested at January 1, 2024 | 67,455 |  |  | $ | 265.15 |
Granted | 27,135 |  |  | 349.59 |
Vested | (9,606) |  |  | 245.40 |
Forfeited | (12,159) |  |  | 258.61 |
Unvested at December 31, 2024 | 72,825 |  |  | $ | 299.87 |
The performance period for the 2021 grants ended as of January 31, 2024. The 2021 grants achieved a 50% payout factor and the Company issued 9,606 common shares in February 2024 for awards that vested in 2024. The performance period for the 2022 grants ended as of January 31, 2025. The 2022 grants achieved a 65% payout factor and the Company issued 15,530 common shares in February 2025 for awards that vested in 2025. As of December 31, 2024, there was $3.2 million of total unrecognized compensation cost related to performance share units that is expected to be recognized over a weighted-average period of 1.0 year. Summary of Share-Based Compensation Expense Total compensation cost related to all share-based awards was as follows:
| Years Ended December 31,
| 2024 |  | 2023 |  | 2022
Stock options expense | $ | 9.8 |  |  | $ | 9.9 |  |  | $ | 9.2 |
Restricted stock expense | 8.3 |  |  | 5.7 |  |  | 6.7 |
Cash-settled restricted stock expense | 3.4 |  |  | 3.4 |  |  | 2.7 |
Performance share units expense | 7.7 |  |  | 6.0 |  |  | 6.0 |
Total pre-tax share-based compensation expense(1) | 29.2 |  |  | 25.0 |  |  | 24.6 |
Income tax benefit | (3.2) |  |  | (2.7) |  |  | (2.4) |
Total share-based compensation expense, net of income taxes | $ | 26.0 |  |  | $ | 22.3 |  |  | $ | 22.2 |
(1) Pre-tax compensation cost is recognized in both Cost of sales and Selling, general and administrative expenses in the Consolidated Statements of Income depending on the functional area of the underlying employees. Pre-tax compensation expense of $1.6 million, $1.4 million and $0.9 million was recognized in Cost of sales in the Consolidated Statements of Income during the years ended December 31, 2024, 2023 and 2022, respectively. Pre-tax compensation expense of $27.6 million, $23.6 million, and $23.7 million was recognized in Selling, general and administrative expenses in the Consolidated Statements of Income during the years ended December 31, 2024, 2023 and 2022, respectively.

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