EXHIBIT 11 TOSCO CORPORATION AND SUBSIDIARIES COMPUTATION OF EARNINGS PER SHARE (a) (Unaudited) (Thousands of Dollars, Except Per Share Data) Three Months Ended September 30, Nine Months Ended September 30, 1997 1996 1997 1996 ------- --------- --------- --------- Income before distributions on company-obligated, mandatorily redeemable, convertible preferred securities $103,456 $42,493 $179,176 $116,097 Distributions on company-obligated, mandatorily redeemable, convertible preferred securities, net of income tax benefit 2,523 - 7,569 - ---------- ---------- ----------- --------- Net income $100,933 $42,493 $171,607 $116,097 ----------- ---------- ----------- --------- PRIMARY EARNINGS PER SHARE Earnings used for computation of primary earnings per share $100,933 $42,493 $171,607 $116,097 ============ ========== =========== ========= Weighted average number of shares outstanding during the period 156,185,661 130,851,153 146,617,794 119,196,819 Assumed conversion of common share equivalents 4,424,517 2,974,680 4,301,608 2,778,525 --------------- ------------ ------------ ------------ Weighted average common and common equivalent shares used for computation of primary earnings per share 160,610,178 133,825,833 150,919,402 121,975,344 ---------------- ------------ ------------- ------------- Primary earnings per common and common equivalent share $ 0.63 $ 0.32 $ 1.14 $ 0.95 ================ ============ ============= ============== FULLY DILUTED EARNINGS PER SHARE Earning used for computation of fully diluted earnings per share $ 103,456 $ 42,493 $ 179,176 $ 116,097 ---------------- ------------ -------------- -------------- Weighted average number of shares outstanding during the period 156,185,661 130,851,153 146,617,794 119,196,819 Assumed conversion of common share equivalents 4,648,105 3,323,658 4,648,105 3,323,661 Assumed conversion of company-obligated, mandatorily redeemable, convertible preferred securities 9,113,940 9,113,940 ---------------- ------------- --------------- ---------------- Weighted average common and common equivalent shares used for computation of fully diluted earnings per share 169,947,706 134,174,811 160,379,839 122,520,480 -------------- -------------- --------------- --------------- Fully diluted earnings per common and common equivalent share $0.61 $0.32 $1.12 $0.95 ============== ============== =============== =============== (a) Earnings per share and weighted average shares outstanding reflect the 3-for-1 stock split declared and distributed in February 1997.