EXHIBIT 12 UNION PACIFIC CORPORATION AND SUBSIDIARY COMPANIES COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES ------------------------------------------------- (Unaudited) - -------------------------------------------------------------------------------- Three Months Ended March 31, ---------------------------- Millions, Except Ratios 2000 1999 - -------------------------------------------------------------------------------- Earnings: Net Income............................................... $185 $129 Undistributed equity earnings............................ (12) (10) - -------------------------------------------------------------------------------- Total.................................................... 173 119 - -------------------------------------------------------------------------------- Income taxes............................................... 105 72 - -------------------------------------------------------------------------------- Fixed charges: Interest expense including amortization of debt discount. 182 186 Portion of rentals representing an interest factor....... 45 45 - -------------------------------------------------------------------------------- Total.................................................... 227 231 - -------------------------------------------------------------------------------- Earnings available for fixed charges....................... 505 422 - -------------------------------------------------------------------------------- Total fixed charges -- as above............................ 227 231 - -------------------------------------------------------------------------------- Ratio of earnings to fixed charges (Note 8)................ 2.2 1.8 - --------------------------------------------------------------------------------