Exhibit 11 OLIN CORPORATION AND CONSOLIDATED SUBSIDIARIES Computation of Per Share Earnings (Unaudited) (In millions) Nine Months Ended September 30, ----------------- 1996 1995 ---- ---- Primary earnings per share - -------------------------- Primary earnings: Net income $134.5 $113.1 Less ESOP preferred dividend, net of tax benefit and other (5.0) (4.3) ----- ----- Net income $129.5 $108.8 ===== ===== Primary shares: Weighted average shares outstanding 49.8 48.8 ===== ===== Primary net income per common share $2.60 $2.24 ===== ===== Fully diluted earnings per share - -------------------------------- Fully diluted earnings: Net income $134.5 $113.1 Less additional ESOP contribution (2.5) (2.3) ----- ----- Net income $132.0 $110.8 ===== ===== Fully diluted shares: Weighted average number of common shares outstanding and common stock equivalents 49.8 48.8 Dilutive effect of: ESOP preferred stock 2.0 2.5 Stock options 0.4 0.1 ----- ----- Fully diluted shares 52.2 51.4 ===== ===== Fully diluted net income per common share $2.53 $2.16 ===== =====