EXHIBIT 11 MINNESOTA MINING AND MANUFACTURING COMPANY AND SUBSIDIARIES EARNINGS PER SHARE OF COMMON STOCK (Unaudited) Three months ended March 31 1997 1996 ------- ------- (Millions) Net income $410 $362 - -------------------------------------------------------- Primary earnings per share: Net Income $.99 $.87 Weighted average number of common shares outstanding 416,605,836 418,545,428 - -------------------------------------------------------- Fully diluted earnings per share: (1) Net Income $.97 $.85 Weighted average number of common shares outstanding 416,605,836 418,545,428 Common equivalent shares 6,471,512 6,082,097 ----------- ----------- Average number of common and common equivalent shares outstanding 423,077,348 424,627,525 - --------------------------------------------------------- Primary earnings per share is computed by dividing net income by the weighted average number of common shares outstanding for each period. The calculation excludes the effect of common equivalent shares resulting from stock options using the treasury stock method as the effect would not be material. Fully diluted earnings per share is computed based on the weighted average number of common shares and common equivalent shares outstanding for each period. (1) This calculation is submitted in accordance with Regulation S-K Item 601(b)(11) although not required by APB Opinion No. 15 because it results in dilution of less than 3%.