Net Loss Per Share
The following is a calculation of the basic and diluted net loss per share (in thousands, except share and per share data):
Years ended December 31,
202520242023
Net loss attributable to Vir Bio$(437,987)$(521,960)$(615,061)
Weighted-average shares outstanding, basic and diluted138,520,419136,246,865134,130,924
Net loss per share attributable to Vir Bio, basic and diluted$(3.16)$(3.83)$(4.59)
Securities that could potentially dilute basic net loss per common share in the future that were not included in the computation of diluted net loss per common share because to do so would have been antidilutive for the years presented were as follows:
Years ended December 31,
202520242023
Options issued and outstanding8,634,5119,605,59111,124,181
Restricted shares subject to future vesting5,690,0084,981,0825,260,229
Total14,324,51914,586,67316,384,410

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.