UNISOURCE ENERGY CORPORATION EXHIBIT 11 - COMPUTATION OF EARNINGS PER SHARE Three Months Ended June 30, 2000 1999 ------ ------ - Thousands of Dollars - (except per share data) BASIC EARNINGS PER SHARE: Net Income $10,659 $ 3,708 Average Shares of Common Stock Outstanding 32,389 32,309 --------- -------- Basic Earnings Per Share $ 0.33 $ 0.11 ========= ======== DILUTED EARNINGS PER SHARE: Net Income $10,659 $ 3,708 Average Shares of Common Stock Outstanding 32,389 32,309 Effect of Dilutive Securities: Warrants - - Options and Stock Issuable under Employee Benefit Plans 457 335 --------- -------- Total Shares 32,846 32,644 --------- -------- Diluted Earnings Per Share $ 0.32 $ 0.11 ========= ======== 4.6 million of the 6.1 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, 2000 1999 ------ ------ - Thousands of Dollars - (except per share data) BASIC EARNINGS PER SHARE: Net Income (Loss) $10,901 $(1,820) Average Shares of Common Stock Outstanding 32,382 32,297 --------- -------- Basic Earnings Per Share $ 0.34 $ (0.06) ========= ======== DILUTED EARNINGS PER SHARE: Net Income (Loss) $10,901 $(1,820) Average Shares of Common Stock Outstanding 32,382 32,297 Effect of Dilutive Securities: Warrants - - Options and Stock Issuable Under Employee Benefit Plans 420 - --------- -------- Total Shares 32,802 32,297 --------- -------- Diluted Earnings Per Share $ 0.33 $ (0.06) ========= ======== 4.6 million of the 6.1 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.