EXHIBIT 11 INVESTORSBANCORP, INC. AND SUBSIDIARIES COMPUTATION OF BASIC AND DILUTED EARNINGS PER SHARE (UNAUDITED) A reconciliation of the income and shares used in computing the basic and diluted earnings per share is as follows: FOR THREE MONTHS ENDED MARCH 31, ----------------------- 2003 2002 -------- -------- Net income $571,109 $401,748 ======== ======== Determination of shares: Weighted average common shares outstanding (basic) 928,460 940,000 Assumed conversion of stock options 53,758 41,084 -------- -------- Weighted average common shares outstanding (diluted) 982,218 981,084 ======== ======== Basic earnings per common share $ 0.62 $ 0.43 ======== ======== Diluted earnings per common share $ 0.58 $ 0.41 ======== ========