1 EXHIBIT 11 ROWAN COMPANIES, INC. AND SUBSIDIARIES COMPUTATION OF PRIMARY AND FULLY DILUTED EARNINGS (LOSS) PER SHARE (in thousands except per share amounts) For the Year Ended December 31 ------------------------------------------------- 1996 1995 1994 -------- -------- ------- Weighted average shares of common stock outstanding 85,335 84,589 84,092 Stock options (treasury stock method) 2,107 630 (A) 444 (A) ------------------------------------------------- Weighted average shares for primary earnings (loss) per share calculation 87,442 85,219 84,536 Stock options (treasury stock method) 450 790 (A) Shares issuable from assumed conversion of floating rate subordinated convertible debentures 400 400 (A) 400 (A) ------------------------------------------------- Weighted average shares for fully diluted earnings (loss) per share calculation 88,292 86,409 84,936 ================================================= Net income (loss) for primary calculation $61,338 ($18,436) ($22,989) Subordinated debenture interest 323 374 301 ------------------------------------------------- Net income (loss) for fully diluted calculation $61,661 ($18,062) ($22,688) ================================================= Primary earnings (loss) per share $0.70 ($0.22) ($0.27) ================================================= Fully diluted earnings (loss) per share $0.70 ($0.21) (B) ($0.27) ================================================= Note: Reference is made to Note 1 to Consolidated Financial Statements regarding computation of per share amounts. (A) Included in accordance with Regulation S-K Item 601(b)(11) although not required to be provided or by Accounting Principles Board Opinion No. 15 because the effect is insignificant. (B) This calculation is submitted in accordance with regulation S-K Item 601(b)(11) although it is contrary to paragraph 40 of APB Opinion No. 15 because it produces an antidilutive result.