EXHIBIT 11 AMGEN INC. COMPUTATION OF PER SHARE EARNINGS PRIMARY COMPUTATION (In thousands except per share data) (Unaudited) Three Months Ended Nine Months Ended September 30, September 30, 1994 1993 1994 1993 -------- -------- -------- -------- Income before cumulative effect of a change in accounting principle $113,956 $102,692 $314,880 $283,476 Cumulative effect of a change in accounting principle - - - 8,738 -------- -------- -------- -------- Net income $113,956 $102,692 $314,880 $292,214 ======== ======== ======== ======== Applicable common and common stock equivalent shares: Weighted average shares of common stock outstanding during the period 132,894 134,952 133,312 135,701 Incremental number of shares outstanding during the period resulting from the assumed exercises of stock options and warrants 6,352 7,467 6,709 8,366 -------- -------- -------- -------- Weighted average shares of common stock and common stock equivalents outstanding during the period 139,246 142,419 140,021 144,067 ======== ======== ======== ======== Earnings per common share primary: Income before cumulative effect of a change in accounting principle $ .82 $ .72 $ 2.25 $ 1.97 Cumulative effect of a change in accounting principle - - - .06 -------- -------- -------- -------- Net income $ .82 $ .72 $ 2.25 $ 2.03 ======== ======== ======== ======== AMGEN INC. COMPUTATION OF PER SHARE EARNINGS FULLY DILUTED COMPUTATION (In thousands except per share data) (Unaudited) Three Months Ended Nine Months Ended September 30, September 30, 1994 1993 1994 1993 -------- -------- -------- -------- Income before cumulative effect of a change in accounting principle $113,956 $102,692 $314,880 $283,476 Cumulative effect of a change in accounting principle - - - 8,738 -------- -------- -------- -------- Net income $113,956 $102,692 $314,880 $292,214 ======== ======== ======== ======== Applicable common and common stock equivalent shares: Weighted average shares of common stock outstanding during the period 132,894 134,952 133,312 135,701 Incremental number of shares outstanding during the period resulting from the assumed exercises of stock options and warrants 6,636 7,865 7,636 8,366 -------- -------- -------- -------- Weighted average shares of common stock and common stock equivalents outstanding during the period 139,530 142,817 140,948 144,067 ======== ======== ======== ======== Earnings per common share fully diluted: Income before cumulative effect of a change in accounting principle $ .82 $ .72 $ 2.23 $ 1.97 Cumulative effect of a change in accounting principle - - - .06 -------- -------- -------- -------- Net income $ .82 $ .72 $ 2.23 $ 2.03 ======== ======== ======== ========