EXHIBIT 11 CLX ENERGY, INC. Computation of Net Income (Loss) Per Share (Unaudited) Nine Months Three Months Ended June 30, Ended June 30, ----------------------- -------------------- 2003 2002 2003 2002 ---------- ----------- --------- --------- Net income (loss) $ 44,002 ( 103,419) 30,947 6,739 ========== =========== ========= ========= Weighted average number of common shares outstanding 2,631,936 2,631,936 2,631,936 2,631,936 Common equivalent shares representing shares issuable upon exercise of outstanding Options - - - - ---------- ----------- --------- --------- 2,631,936 2,631,936 2,631,936 2,631,936 ========== =========== ========= ========= Net income (loss) per share: Basic $ .02 ( .04) 0.01 .00 ========== =========== ========= ========= Diluted $ .02 ( .04) 0.01 .00 ========== =========== ========= ========= Diluted EPS includes the potential conversion of stock options that are dilutive. No stock options were dilutive for any period presented. Stock options are not considered in the diluted EPS calculation for those periods with net losses, as the impact of the potential common shares (250,000 shares at June 30, 2002) would be to decrease loss per share.