EXHIBIT 11.1 ALDILA, INC. AND SUBSIDIARIES COMPUTATION OF NET INCOME PER COMMON SHARE - UNAUDITED (IN THOUSANDS, EXCEPT PER SHARE DATA) Three months ended Nine months ended September 30, September 30, -------------------------- -------------------------- 2000 1999 2000 1999 ------------ ------------ ------------ ------------ BASIC: Net income (loss) $ 37 $ (754) $ 2,273 $ (1,133) Weighted average number of common shares outstanding 15,462 15,462 15,462 15,462 ------------ ------------ ------------ ------------ Net income (loss) per common share $ 0.01 $ (0.05) $ 0.15 $ (0.07) ============ ============ ============ ============ ASSUMING DILUTION: Net income (loss) $ 37 $ (754) $ 2,273 $ (1,133) Weighted average number of common shares outstanding 15,462 15,462 15,462 15,462 The number of shares resulting from the assumed exercise of stock options reduced by the number of shares which could have been purchased with the proceeds from such exercise, using the average market price during the period 255 - 138 - ------------ ------------ ------------ ------------ Weighted average number of common and common equivalent shares 15,717 15,462 15,600 15,462 ------------ ------------ ------------ ------------ Net income (loss) per common share, assuming dilution $ 0.01 $ (0.05) $ 0.15 $ (0.07) ============ ============ ============ ============