EXHIBIT 11.0 KIRBY CORPORATION AND CONSOLIDATED SUBSIDIARIES COMPUTATION OF EARNINGS PER COMMON SHARE Three months ended Nine months ended September 30, September 30, ------------------ ----------------- 1994 1993 1994 1993 ------ ------ ------ ------ ($ in thousands, except per share amounts) Net earnings $ 3,606 5,046 9,696 15,391 ====== ====== ====== ====== Shares: Weighted average number of common shares outstanding 28,439 28,332 28,419 25,442 Common equivalent shares for dilutive effect of assumed exercise of stock options 290 281 322 244 ------ ------ ------ ------ 28,729 28,613 28,741 25,686 ====== ====== ====== ====== Earnings per share of common stock $ .13 .18 .34 .60 ====== ====== ====== ====== 28,729 28,613 28,741 25,686