UNISOURCE ENERGY CORPORATION EXHIBIT 11 - COMPUTATION OF EARNINGS PER SHARE Three Months Ended September 30, 2001 2000 ------ ------ - Thousands of Dollars - (except per share data) BASIC EARNINGS PER SHARE: Net Income $15,548 $17,239 Average Shares of Common Stock Outstanding 33,472 32,423 --------- -------- Basic Earnings Per Share $ 0.46 $ 0. 53 ========= ======== DILUTED EARNINGS PER SHARE: Net Income $15,548 $17,239 Average Shares of Common Stock Outstanding 33,472 32,423 Effect of Dilutive Securities: Warrants 123 - Options and Stock Issuable under Employee Benefit Plans 642 467 --------- -------- Total Shares 34,237 32,890 --------- -------- Diluted Earnings Per Share $ 0.45 $ 0.52 ========= ======== At September 30, 2001, UniSource Energy had no outstanding warrants. There were 4.6 million of TEP warrants outstanding that were 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 Nine Months Ended September 30, 2001 2000 ------ ------ - Thousands of Dollars - (except per share data) BASIC EARNINGS PER SHARE: Net Income Before Cumulative Effect of Accounting Change $ 47,597 $28,140 Cumulative Effect of Accounting Change 470 - -------- -------- Net Income $ 48,067 $28,140 Average Shares of Common Stock Outstanding 33,360 32,397 -------- -------- Basic Earnings Per Share Before Cumulative Effect of Accounting Change $ 1.43 $ 0.87 Basic Earnings Per Share From Cumulative Effect of Accounting Change 0.01 - -------- -------- Basic Earnings Per Share $ 1.44 $ 0.87 ======== ======== DILUTED EARNINGS PER SHARE: Net Income Before Cumulative Effect of Accounting Change $ 47,597 $28,140 Cumulative Effect of Accounting Change 470 - --------- -------- Net Income $ 48,067 $28,140 Average Shares of Common Stock Outstanding 33,360 32,397 Effect of Dilutive Securities: Warrants 180 - Options and Stock Issuable under Employee Benefit Plans 676 436 --------- -------- Total Shares 34,216 32,833 --------- -------- Diluted Earnings Per Share Before Cumulative Effect of Accounting Change $ 1.39 $ 0.86 Diluted Earnings Per Share From Cumulative Effect of Accounting Change 0.01 - --------- -------- Diluted Earnings Per Share $ 1.40 $ 0.86 ========= ======== At September 30, 2001, UniSource Energy had no outstanding warrants. There were 4.6 million of TEP warrants outstanding that were 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.