UNISOURCE ENERGY CORPORATION EXHIBIT 11 - COMPUTATION OF EARNINGS PER SHARE Three Months Ended June 30, 1999 1998 ------ ------ - Thousands of Dollars - (except per share data) BASIC EARNINGS PER SHARE: Net Income $3,708 $1,058 Average Shares of Common Stock Outstanding 32,316 32,138 --------- -------- Basic Earnings Per Share $ 0.11 $ 0.03 ========= ======== DILUTED EARNINGS PER SHARE: Net Income $3,708 $1,058 Average Shares of Common Stock Outstanding 32,316 32,138 Effect of Dilutive Securities: Warrants - 127 Options and Stock Issuable under Employee Benefit Plans 335 129 --------- -------- Total Shares 32,651 32,394 --------- -------- Diluted Earnings Per Share $ 0.11 $ 0.03 ========= ======== 4.6 million of the 7.6 million warrants outstanding are exercisable into TEP common stock. However, the dilutive effect is the same as it would be if the warrants were exercisable into UniSource Energy Common Stock. UNISOURCE ENERGY CORPORATION EXHIBIT 11 - COMPUTATION OF EARNINGS PER SHARE Six Months Ended June 30, 1999 1998 ------ ------ - Thousands of Dollars - (except per share data) BASIC EARNINGS PER SHARE: Net Income (Loss) $(1,820) $(5,977) Average Shares of Common Stock Outstanding 32,301 32,138 --------- -------- Basic Earnings Per Share $ (0.06) $ (0.19) ========= ======== DILUTED EARNINGS PER SHARE: Net Income (Loss) $(1,820) $(5,977) Average Shares of Common Stock Outstanding 32,301 32,138 Effect of Dilutive Securities: Warrants - - Options and Stock Issuable Under Employee Benefit Plans - - --------- -------- Total Shares 32,515 32,138 --------- -------- Diluted Earnings Per Share $ (0.06) $ (0.19) ========= ======== 4.6 million of the 7.6 million warrants outstanding are exercisable into TEP common stock. However, the dilutive effect is the same as it would be if the warrants were exercisable into UniSource Energy Common Stock.