EXHIBIT 11 TOSCO CORPORATION AND SUBSIDIARIES COMPUTATION OF EARNINGS PER SHARE (Unaudited) (Thousands of Dollars, Except Per Share Data) Three Months Ended September 30, Nine Months Ended September 30, 1998 1997 1998 1997 Income before distributions on Trust Preferred Securities $82,804 $103,456 $229,695 $179,176 Distributions on Trust Preferred Securities, net of income tax benefit 2,523 2,523 7,569 7,569 ------------ ------------ ------------ ------------ Net income $80,281 $100,933 $222,126 $171,607 ============ ============ ============ ============ BASIC EARNINGS PER SHARE Earnings used for computation of basic earnings per share $80,281 $100,933 $222,126 $171,607 --------------- ------------ ------------ --------------- Weighted average common shares outstanding during the period 154,774,056 156,185,661 155,816,033 146,617,794 --------------- ------------ ------------ --------------- Basic earnings per share $ 0.52 $ 0.65 $ 1.43 $ 1.17 --------------- ------------ ------------ --------------- DILUTED EARNINGS PER SHARE Earnings used for computation of diluted earnings per share $ 82,804 $ 103,456 $229,695 $ 179,176 --------------- ------------ ------------ ------------ Weighted average common shares outstanding during the period 154,774,056 156,185,661 155,816,033 146,617,794 Assumed conversion of dilutive stock options 3,790,590 4,424,517 3,994,905 4,301,608 Assumed conversion of Trust Preferred Securities 9,113,940 9,113,940 9,113,940 9,113,940 --------------- ------------ ------------ ------------ Weighted average common and common equivalent shares used for computation of diluted earning per share 167,678,586 169,724,118 168,924,878 160,033,342 -------------- ------------ ------------ ------------ Diluted earnings per share $ 0.49 $ 0.61 $ 1.36 $ 1.12 ============== ============ ============ ============= SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. TOSCO CORPORATION (Registrant) Date: November 13, 1998 By: /S/ ROBERT I. SANTO ------------------------ (Robert I. Santo) Vice President and Chief Accounting Officer