EXHIBIT 11.0 NORTHWEST PIPE COMPANY COMPUTATION OF NET INCOME PER SHARE (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS) THREE MONTHS ENDED NINE MONTHS ENDED SEPTEMBER 30, SEPTEMBER 30, --------------------------------------------------- 1996 1995 1996 1995 -------- -------- -------- -------- Net income as reported $ 2,677 $ 1,099 $ 8,046 $ 3,492 Reduction in interest as a result of conversion of the Series B and Series C Convertible Subordinated Debentures, net of tax -- 43 -- 133 -------- -------- -------- -------- Net income $ 2,677 $ 1,142 $ 8,046 $ 3,625 -------- -------- -------- -------- -------- -------- -------- -------- Net income per share $ 0.48 $ 0.32 $ 1.45 $ 1.03 -------- -------- -------- -------- -------- -------- -------- -------- Weighted average shares outstanding: Common stock 5,294 698 5,281 698 Common stock issuable upon exercise of stock options 245 230 256 224 Conversion of Series B and Series C Convertible Subordinated Debentures -- 2,629 -- 2,629 -------- -------- -------- -------- Shares used in per share calculations 5,539 3,557 5,537 3,551 -------- -------- -------- -------- -------- -------- -------- --------