Exhibit 11.1 (1 of 2) Castle Energy Corporation Statement of Computation of Earnings Per Share (Dollars in thousands, except per share amounts) (Unaudited) Three Months Ended March 31, ----------------------------------------------------------------------- 1997 1996 --------------------------------- -------------------------------- Fully Fully Primary Diluted Primary Diluted -------------- -------------- ----------------- ------------ I. Shares Outstanding, September 30 6,693,646 6,693,646 6,693,646 6,693,646 II. Stock Purchased During the Period: Stock, net 9,778 9,778 Purchase of treasury stock (weighted) (925,196) (925,196) - - ---------- ---------- ---------- ---------- 5,778,228 5,778,228 6,693,646 6,693,646 III. Weighted Equivalent Shares: Assumed options and warrants exercised 42,004 42,004 19,292 25,756 ---------- ---------- ---------- ---------- IV. Weighted Average Shares and Equivalent Shares 5,820,232 5,820,232 6,712,938 6,717,402 ========== ========== ========== ========== V. Net Income $2,910,000 $2,910,000 $5,134,000 $5,134,000 ========== ========== ========== ========== VI. Net Income Per Share $ .50 $ .50 $ .77 $ .76 ========== ========== ========== ========= Exhibit 11.1 (2 of 2) Castle Energy Corporation Statement of Computation of Earnings Per Share (Dollars in thousands, except per share amounts) (Unaudited) Six Months Ended March 31, --------------------------------------------------------------------- 1997 1996 ------------------------------ --------------------------------- Fully Fully Primary Diluted Primary Diluted ------------- -------------- ---------------- -------------- I. Shares Outstanding, September 30 6,693,646 6,693,646 6,693,646 6,693,646 II. Stock Purchased During the Period: Stock, net 4,835 4,835 Purchase of treasury stock (weighted) (300,735) (300,735) - - ---------- ---------- ----------- ----------- 6,397,746 6,397,746 6,693,646 6,693,646 III. Weighted Equivalent Shares: Assumed options and warrants exercised 32,102 38,335 18,701 25,715 ---------- ---------- ----------- ----------- IV. Weighted Average Shares and Equivalent Shares 6,429,848 6,436,081 6,712,347 6,719,361 ========== ========== =========== =========== V. Net Income $5,146,000 $5,146,000 $10,628,000 $10,628,000 ========== ========== =========== =========== VI. Net Income Per Share $ .80 $ .80 $ 1.58 $ 1.58 ========== ========== =========== ===========