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 FOR SIX MONTHS ENDED ---------------------- -------------------- JUNE 30, JUNE 30, -------- -------- 2003 2002 2003 2002 ---- ---- ---- ---- Net income $ 826,023 $ 398,755 $ 1,397,132 $ 800,503 =============== =============== =============== =============== Determination of shares: Weighted average common shares outstanding (basic) 990,746 940,000 959,775 940,000 Assumed conversion of stock options 52,556 48,821 53,615 44,793 --------------- --------------- --------------- --------------- Weighted average common shares outstanding (diluted) 1,043,302 988,821 1,013,390 984,793 =============== =============== =============== =============== Basic earnings per common share $ 0.83 $ 0.42 $ 1.46 $ 0.85 =============== =============== =============== =============== Diluted earnings per common share $ 0.79 $ 0.40 $ 1.38 $ 0.81 =============== =============== =============== =============== 23