1 EXHIBIT 11 CHESAPEAKE ENERGY CORPORATION AND SUBSIDIARIES STATEMENT OF NET INCOME PER SHARE ($ in thousands, except per share) (Unaudited) THREE MONTHS ENDED SEPTEMBER 30, -------------------------- 1997 1996 -------- -------- PRIMARY INCOME PER SHARE Computation for statement of operations Net income per statement of operations $ 5,513 $ 8,204 ======== ======== Common shares outstanding 70,376 60,252 Adjustment to weighted average common shares outstanding: Add dilutive effect of: Employee Options 2,323 4,006 -------- -------- Weighted average common shares and common equivalent shares outstanding, as adjusted 72,699 64,258 ======== ======== Net income per common share, as adjusted $ .08 $ .13 ======== ======== FULLY DILUTED INCOME PER SHARE Net income applicable to common stock as shown in primary computation above $ 5,513 $ 8,204 ======== ======== Common shares outstanding 70,376 60,252 Adjustment to weighted average common shares outstanding: Add fully dilutive effect of: Employee Options 2,867 4,086 -------- -------- Weighted average common shares and common equivalent shares outstanding, as adjusted 73,243 64,338 ======== ======== Fully diluted net income per common share $ .08 $ .13 ======== ========