HILLS BANCORPORATION EXHIBIT II COMPUTATION OF EARNINGS PER COMMON SHARE Three Months Ended Six Months Ended June 30 June 30 ----------------------- ----------------------- 1998 1997 1998 1997 ---------- ---------- ---------- ---------- Weighted average number of shares outstanding (basic) .... 1,467,754 1,467,259 1,467,754 1,467,259 Weighted average of potential dilutive shares attributable to stock options granted computed under the treasury stock method ................................................... 20,563 13,674 21,931 12,940 ---------- ---------- ---------- ---------- Weighted average number of shares (diluted) .............. 1,488,317 1,480,933 1,489,685 1,480,199 ========== ========== ========== ========== Earnings Per Share: Net income (in thousands) ............................. $ 1,733 $ 1,935 $ 3,577 $ 3,546 ========== ========== ========== ========== Earnings per common share: Basic ............................................... $ 1.18 $ 1.32 $ 2.44 $ 2.42 ========== ========== ========== ========== Diluted ............................................. 1.16 1.31 2.40 2.40 ========== ========== ========== ==========