1 EXHIBIT 11B GATX CORPORATION AND SUBSIDIARIES COMPUTATION OF DILUTED NET INCOME PER SHARE (IN MILLIONS, EXCEPT PER SHARE AMOUNTS) YEAR ENDED DECEMBER 31 --------------------------------- 2000 1999 1998 ------- ------- ------- Average number of shares used to compute basic net income per share 47.9 49.3 49.2 Shares issuable upon assumed exercise of stock options, reduced by the number of shares which could have been purchased with the proceeds from exercise of such options .8 .9 1.1 Common stock issuable upon assumed conversion of preferred stock .1 .1 .1 ------- ------- ------- Total 48.8 50.3 50.4 Net income, as adjusted per basic computation $ 66.5 $ 151.2 $ 131.8 Add - dividends paid on preferred stock .1 .1 .1 ------- ------- ------- Net income, as adjusted $ 66.6 $ 151.3 $ 131.9 ======= ======= ======= Diluted net income per share: Income from continuing operations $ .63 $ 2.51 $ 2.27 Income from discontinued operations .74 .50 .35 ------- ------- ------- Total diluted net income per share $ 1.37 $ 3.01 $ 2.62 ======= ======= ======= The company had approximately 3.5 million, 3.7 million and 3.4 million stock options outstanding at December 31, 2000, 1999 and 1998, respectively, which have been excluded from the computation of diluted earnings per share since they are anti-dilutive. 23