Stockholders' Equity | (3) Stockholders' Equity Dividends On April 12, 2023, our board of directors declared a quarterly dividend of $0.35 per share of common stock to be paid in cash on May 25, 2023 to shareholders of record at the close of business on April 27, 2023. The following table presents the cash dividends either paid previously or declared by our board of directors for future payment on a per share basis: 2023 2022 First quarter $ 0.35 $ 0.31 Second quarter $ 0.35 $ 0.31 Third quarter $ 0.31 Fourth quarter $ 0.31 Total $ 0.70 $ 1.24 Stock Options The following tables summarize the details of options granted under our stock option plans that were outstanding as of March 31, 2023, and the assumptions used to value those grants. All such grants were effective at the close of business on the date of grant. Options Option Exercise Closing Stock Price on Date March 31, 2023 Date of Grant Options Options January 3, 2023 1,071,943 $ 48.00 $ 47.400 1,062,367 70,562 January 3, 2022 713,438 $ 62.00 $ 61.980 666,921 53,355 January 4, 2021 741,510 $ 48.00 $ 47.650 654,243 244,108 January 2, 2020 902,263 $ 38.00 $ 37.230 744,467 382,024 January 2, 2019 1,316,924 $ 26.00 $ 25.705 900,545 559,781 January 2, 2018 1,087,936 $ 27.50 $ 27.270 658,540 527,626 January 3, 2017 1,529,578 $ 23.50 $ 23.475 651,325 547,059 April 19, 2016 1,690,880 $ 23.00 $ 22.870 478,231 356,861 April 21, 2015 1,786,440 $ 21.00 $ 20.630 322,855 247,151 April 22, 2014 1,910,000 $ 28.00 $ 25.265 30,298 30,298 Total 12,750,912 6,169,792 3,018,825 Date of Grant Risk-free Expected Life of Expected Expected Estimated Fair January 3, 2023 4.0 % 5.00 2.6 % 29.58 % $ 11.62 January 3, 2022 1.3 % 5.00 1.7 % 28.52 % $ 13.68 January 4, 2021 0.4 % 5.00 2.0 % 29.17 % $ 9.57 January 2, 2020 1.7 % 5.00 2.4 % 25.70 % $ 6.81 January 2, 2019 2.5 % 5.00 2.9 % 23.96 % $ 4.40 January 2, 2018 2.2 % 5.00 2.3 % 23.45 % $ 5.02 January 3, 2017 1.9 % 5.00 2.6 % 24.49 % $ 4.20 April 19, 2016 1.3 % 5.00 2.6 % 26.34 % $ 4.09 April 21, 2015 1.3 % 5.00 2.7 % 26.84 % $ 3.68 April 22, 2014 1.8 % 5.00 2.0 % 28.55 % $ 4.79 All of the options in the tables above vest and become exercisable over a period of up to eight years. Generally, each option will terminate approximately 10 years after the grant date. The fair value of each share-based option is estimated on the date of grant using a Black-Scholes valuation method that uses the assumptions listed above. The risk-free interest rate is based on the U.S. Treasury rate over the expected life of the option at the time of grant. The expected life is the average length of time over which we expect the employee groups will exercise their options, net of forfeitures, which is based on historical experience with similar grants. The dividend yield is estimated over the expected life of the option based on our current dividend payout, historical dividends paid, and expected future cash dividends. Expected stock volatilities are based on the movement of our stock price over the most recent historical period equivalent to the expected life of the option. Compensation expense equal to the grant date fair value is recognized for all of these awards over the vesting period. The stock-based compensation expense for the three-month periods ended March 31, 2023 and 2022 was $1.9 and $1.5, respectively. Unrecognized stock-based compensation expense related to outstanding unvested stock options as of March 31, 2023 was $22.3 and is expected to be recognized over a weighted average period of 4.67 years. Any future changes in estimated forfeitures will impact this amount. Earnings Per Share The following tables present a reconciliation of the denominators used in the computation of basic and diluted earnings per share and a summary of the options to purchase shares of common stock which were excluded from the diluted earnings per share calculation because they were anti-dilutive: Three-month Period Reconciliation 2023 2022 Basic weighted average shares outstanding 570,928,848 575,559,161 Weighted shares assumed upon exercise of stock options 1,703,741 2,059,645 Diluted weighted average shares outstanding 572,632,589 577,618,806 Three-month Period Summary of Anti-dilutive Options Excluded 2023 2022 Options to purchase shares of common stock 2,269,908 930,401 Weighted average exercise prices of options $ 52.17 58.40 |