Exhibit 11A GATX CORPORATION AND SUBSIDIARIES COMPUTATION OF NET INCOME PER SHARE OF COMMON STOCK AND COMMON STOCK EQUIVALENTS In Millions, Except Per Share Amounts Three Months Six Months Ended June 30 Ended June 30 --------------- --------------- 1997 1996 1997 1996 ------ ------ ------ ------ Average number of shares of Common Stock outstanding ............................ 21.4 20.2 20.9 20.2 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 .................................. .4 .3 .4 .3 ------ ------ ----- ----- Total shares .......................................... 21.8 20.5 21.3 20.5 ====== ====== ===== ====== Net income ............................................ $ 30.2 $ 25.7 $ 61.4 $ 50.4 Deduct - Dividends paid and accrued on preferred stock .................................. 3.3 3.3 6.6 6.6 ------ ------ ------ ------ Net income, as adjusted ............................... $ 26.9 $ 22.4 $ 54.8 $ 43.8 ====== ====== ====== ====== Net income per share .................................. $ 1.23 $ 1.09 $ 2.57 $ 2.14 ====== ====== ====== ====== <FN> Note: In February 1997, the Financial Accounting Standards Board issued Statement No. 128 (FAS 128), Earnings per Share, which is required to be adopted on December 31, 1997. At that time, the Company will be required to change the method currently used to compute earnings per share and to restate all prior periods. In addition to changes in the computation, the terms "primary" and "fully diluted" earnings per share will be replaced with the terms "basic" and "diluted," respectively. Under the new requirements for calculating primary/basic earnings per share, the dilutive effect of stock options will be excluded. The impact is expected to result in an increase in primary/basic earnings per share of approximately $.03 and $.02 per share for each of the quarters ended June 30, 1997 and June 30, 1996, respectively. The impact of FAS 128 on the calculation of fully diluted/diluted earnings per share for these quarters is expected to result in no change. </FN> -13-