Net Income Per Share
Basic net income per share is computed by dividing net income by the weighted average number of common shares outstanding during the period. Diluted net income per share is computed by dividing net income by the weighted average number of common and dilutive common stock equivalent shares outstanding during the period. The Company’s nonvested restricted stock units do not have nonforfeitable rights to dividends or dividend equivalents and are not considered participating securities that should be included in the computation of earnings per share under the two-class method.
The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share data):
 Years Ended September 30,
 202520242023
Numerator
Net income$692,380 $566,778 $394,948 
Denominator
Weighted average shares outstanding — basic57,904 58,720 59,909 
Dilutive effect of common shares from stock options and restricted stock units
780 639 361 
Weighted average shares outstanding — diluted58,684 59,359 60,270 
Basic net income per share$11.96 $9.65 $6.59 
Diluted net income per share$11.80 $9.55 $6.55 
Anti-dilutive stock-based awards excluded from the calculations of diluted earnings per share were not material for the years ended September 30, 2025, 2024 and 2023.

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.