1 EXHIBIT 11 CABOT CORPORATION AND CONSOLIDATED SUBSIDIARIES STATEMENT REGARDING COMPUTATION OF PER SHARE EARNINGS For the three month period ended June 30, 1996 (In thousands, except per share amounts) Primary Fully Diluted ------- ------------- Shares of common stock outstanding at April 1, 1996, less treasury stock 71,436 71,436 Plus net weighted shares of treasury stock issued 120 120 Plus common stock equivalents: Effect of convertible preferred stock conversion 6,098 Effect of equity incentive awards 1,154 1,154 ------- ------- Weighted average shares outstanding 72,710 78,808 ======= ======= Income applicable to common shares $35,035 $35,035 Dividends on preferred stock 715 Preferred stock conversion compensation shortfall (514) ------- ------- Earnings applicable to common shares $35,035 $35,236 ======= ======= Earnings per common share $ 0.48 $ 0.45 ======= ======= -17- 2 EXHIBIT 11 CABOT CORPORATION AND CONSOLIDATED SUBSIDIARIES STATEMENT REGARDING COMPUTATION OF PER SHARE EARNINGS For the nine month period ended June 30, 1996 (In thousands, except per share amounts) Primary Fully Diluted ------- ------------- Shares of common stock outstanding at October 1, 1995 less treasury stock 74,764 74,764 Plus net weighted shares of treasury stock purchased (2,528) (2,528) Plus common stock equivalents: Effect of convertible preferred stock conversion 6,098 Effect of equity incentive awards 1,147 1,147 -------- -------- Weighted average shares outstanding 73,383 79,481 ======== ======== Income applicable to common shares $119,537 $119,537 Dividends on preferred stock 2,479 Preferred stock conversion compensation shortfall (1,547) -------- -------- Earnings applicable to common shares $119,537 $120,469 ======== ======== Earnings per common share $ 1.63 $ 1.52 ======== ======== -18-