FORM 10-K DECEMBER 31, 2004 COMMISSION FILE NO. 1-8491 EXHIBIT 11 HECLA MINING COMPANY AND SUBSIDIARIES CALCULATION OF WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING For the Years Ended December 31, 2004, 2003 and 2002 Year Ended December 31, ------------------------------------------------------------ 2004 2003 2002 ------------------ ------------------ ------------------ Shares of common stock issued at beginning of period 115,543,695 86,187,468 73,068,796 The incremental effect of the issuance of stock in exchange for preferred shares 2,211,352 288,930 5,413,094 The incremental effect of the issuance of new shares for cash, net of issuance costs - - 23,000,000 - - The incremental effect of the issuance of new shares under stock option and warrant plans 300,452 972,928 1,337,437 The incremental effect for the issuance of stock as compensation 401 168,884 395,052 The incremental effect of the issuance of stock related to unearned compensation - - - - 57,106 ------------------ ------------------ ------------------ 118,055,900 110,618,210 80,271,485 Less: Weighted average treasury shares held 8,274 8,274 21,735 ------------------ ------------------ ------------------ Weighted average number of common shares outstanding during the period 118,047,626 110,609,936 80,249,750 ================== ================== ==================