1 EXHIBIT 11.1 PIONEER NATURAL RESOURCES COMPANY STATEMENT OF COMPUTATION OF EARNINGS PER SHARE Per Share Income Shares Amount(a) ----------- ------- --------- (in thousands) DECEMBER 31, 1998 Basic EPS: Loss available to common stockholders $ (746,426) 100,055 $ (7.46) ========= Effect of Dilutive Securities -- -- ----------- ------- Diluted EPS: Loss available to common stockholders plus assumed dilutive conversions $ (746,426) 100,055 $ (7.46) =========== ======= ========= DECEMBER 31, 1997 Basic EPS: Loss available to common stockholders $ (890,671) 51,973 $ (17.14) ========= Effect of Dilutive Securities -- -- ----------- ------- Diluted EPS: Loss available to common stockholders plus assumed dilutive conversions $ (890,671) 51,973 $ (17.14) =========== ======= ========= DECEMBER 31, 1996 Basic EPS: Income available to common stockholders $ 140,248 35,475 $ 3.95 ========= Effect of Dilutive Securities: Options/restricted stock -- 394 Preferred shares 7,683 6,714 ---------- ------- Diluted EPS: Income available to common stockholders plus assumed conversions $ 147,931 42,583 $ 3.47 ========== ======= ========= - ----------- (a) For 1998 and 1997, the computation of diluted net loss per share was antidilutive; therefore, the amounts reported for basic and diluted net loss per share were the same.