The calculation of basic earnings per common share is computed by dividing income available to Arch common shareholders by the weighted average number of Common Shares and common share equivalents outstanding. The following table sets forth the computation of basic and diluted earnings per common share:
Year Ended December 31,
202520242023
Numerator:
Net income$4,399 $4,312 $4,442 
Amounts attributable to noncontrolling interests— — 
Net income available to Arch4,399 4,312 4,443 
Preferred dividends(40)(40)(40)
Net income available to Arch common shareholders$4,359 $4,272 $4,403 
Denominator:
Weighted average common shares outstanding368.4 372.5 368.7 
Effect of dilutive common share equivalents:
Nonvested restricted shares1.6 2.1 2.5 
Stock options (1)5.9 7.2 7.6 
Weighted average common shares and common share equivalents outstanding – diluted375.9 381.8 378.8 
Earnings per common share:
Basic$11.83 $11.47 $11.94 
Diluted$11.60 $11.19 $11.62 
(1)    Certain stock options were not included in the computation of diluted earnings per share where the exercise price of the stock options exceeded the average market price and would have been anti-dilutive or where, when applying the treasury stock method to in-the-money options, the sum of the proceeds, including unrecognized compensation, exceeded the average market price and would have been anti-dilutive. For 2025, 2024 and 2023, the number of stock options excluded were 2.4 million, 2.2 million and 0.5 million, respectively.

Historical Timeline

Fiscal YearFiled
2025Feb 26, 2026Showing above
2024Feb 27, 2025
2023Feb 23, 2024
2022Feb 24, 2023
2021Feb 25, 2022
2020Feb 26, 2021
2019Feb 28, 2020

About Earnings Per Share Disclosures

The earnings per share disclosure breaks down the calculation from net income to both basic and diluted EPS, revealing the full impact of a company's capital structure on per-share economics. The reconciliation between basic and diluted share counts exposes how many stock options, RSUs, convertible securities, and warrants are potentially dilutive to existing shareholders.

Key signals: a widening gap between basic and diluted shares indicates growing dilution from equity compensation or convertible instruments. Anti-dilutive securities excluded from the diluted calculation deserve attention — they represent latent dilution that will materialize if the stock price rises. Watch for the effect of share buybacks on per-share metrics: EPS growth driven primarily by repurchases rather than income growth signals weakening fundamentals. Compare year-over-year changes in the diluted share count against equity compensation expense to assess whether management is effectively managing dilution.