EXHIBIT 11 Greater Bay Bancorp Form 10-Q Statements Re Computation of Earnings Per Share Three Months Ended March 31, (Dollars and shares in thousands, except per share amounts) 1999 1998 - ------------------------------------------------------------------------------------------------------- BASIC EARNINGS PER SHARE: Income available to common shareholders $ 5,058 $ 3,979 Weighted average common shares outstanding 9,688,000 9,356,000 -------------------------------- Basic earnings per share $ 0.52 $ 0.43 ================================ DILUTED EARNINGS PER SHARE: Income available to common shareholders $ 5,058 $ 3,979 Weighted average common shares outstanding 9,688,000 9,356,000 Effect of dilutive securities 588,000 898,000 -------------------------------- Weighted average common and common equivalent shares outstanding 10,276,000 10,254,000 -------------------------------- Diluted earnings per share $ 0.49 $ 0.39 ================================