EXHIBIT 11 Greater Bay Bancorp Form 10-Q Exhibit 11 -- Statements Re Computation of Earnings Per Share Three Months Ended June 30, Six Months Ended June 30, (Dollars and shares in thousands, except per share amounts) 1999 1998 1999 1998 - --------------------------------------------------------------------------------------------- --------------------------------- Basic Earnings Per Share: Income available to common shareholders $ 3,964 $ 3,846 $ 9,666 $ 8,300 Weighted average common shares outstanding 11,193,000 10,859,000 11,133,000 11,087,000 --------------------------- --------------------------------- Basic earnings per share $ 0.35 $ 0.35 $ 0.87 $ 0.75 =========================== ================================= Diluted Earnings Per Share: Income available to common shareholders $ 3,964 $ 3,846 $ 9,666 $ 8,300 Weighted average common shares outstanding 11,193,000 10,859,000 11,133,000 11,087,000 Effect of dilutive securities 605,000 794,000 614,000 588,000 --------------------------- --------------------------------- Weighted average common and common equivalent shares outstanding 11,798,000 11,653,000 11,747,000 11,675,000 --------------------------- --------------------------------- Diluted earnings per share $ 0.34 $ 0.33 $ 0.82 $ 0.71 =========================== =================================