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) 1998 1997 - ---------------------------------------------------------------------------------------------- BASIC EARNINGS PER SHARE: Income available to common shareholders $ 3,646 $ 2,546 Weighted average common shares outstanding 8,107,046 7,853,488 ------------------------------- Basic earnings per share $ 0.45 $ 0.32 =============================== DILUTED EARNINGS PER SHARE: Income available to common shareholders $ 3,646 $ 2,546 Weighted average common shares outstanding 8,107,046 7,853,488 Effect of dilutive securities 898,304 545,440 ------------------------------- Weighted average common and common equivalent shares outstanding 9,005,350 8,398,928 ------------------------------- Diluted earnings per share $ 0.40 $ 0.30 =============================== 31