EXHIBIT 12(a) RATIO OF EARNINGS TO FIXED CHARGES Union Pacific Corporation and Subsidiary Companies (Unaudited) <Table> <Caption> - -------------------------------------------------------------------------------------------------- Three Months Ended June 30, Millions of Dollars, Except Ratios 2002 2001 - -------------------------------------------------------------------------------------------------- Earnings: Net income ............................................. $ 304 $ 243 Undistributed equity earnings .......................... (10) (1) -------- -------- Total earnings ............................................... 294 242 -------- -------- Income taxes ................................................. 174 148 -------- -------- Fixed charges: Interest expense including amortization of debt discount 159 178 Portion of rentals representing an interest factor ..... 11 10 -------- -------- Total fixed charges .......................................... 170 188 -------- -------- Earnings available for fixed charges ......................... $ 638 $ 578 -------- -------- Ratio of earnings to fixed charges ........................... 3.8 3.1 -------- -------- </Table>