EXHIBIT 11 AMGEN INC. COMPUTATION OF PER SHARE EARNINGS PRIMARY COMPUTATION (In millions, except per share data) (Unaudited) Three Months Ended March 31, 1997 1996 ------ ------ Net income ................................. $180.3 $143.6 ====== ====== Applicable common and common stock equivalent shares: Weighted average shares of common stock outstanding during the period ........... 265.2 266.0 Incremental number of shares outstanding during the period resulting from the assumed exercises of stock options ...... 12.9 17.6 ------ ------ Weighted average shares of common stock and common stock equivalents outstanding during the period ................................. 278.1 283.6 ====== ====== Earnings per common share primary ........... $ .65 $ .51 ====== ====== EXHIBIT 11 AMGEN INC. COMPUTATION OF PER SHARE EARNINGS FULLY DILUTED COMPUTATION (In millions, except per share data) (Unaudited) Three Months Ended March 31, 1997 1996 ------ ------ Net income ................................. $180.3 $143.6 ====== ====== Applicable common and common stock equivalent shares: Weighted average shares of common stock outstanding during the period ........... 265.2 266.0 Incremental number of shares outstanding during the period resulting from the assumed exercises of stock options ...... 12.9 17.6 ------ ------ Weighted average shares of common stock and common stock equivalents outstanding during the period ................................. 278.1 283.6 ====== ====== Earnings per common share fully diluted ..... $ .65 $ .51 ====== ======