EXHIBIT 11 SPARTECH CORPORATION AND SUBSIDIARIES STATEMENT RE COMPUTATION OF PER SHARE EARNINGS (In thousands, except per share data) QUARTER ENDED February 3, January 29, 2001 2000 NET EARNINGS Basic net earnings $ 8,555 $ 11,167 Add: Distributions on Preferred Securities, net of tax 502 488 Diluted net earnings 9,057 11,655 WEIGHTED AVERAGE SHARES OUTSTANDING Basic weighted average common shares outstanding 26,673 27,299 Add: Shares issuable from assumed conversion of Preferred Stock 1,637 1,637 Add: Shares issuable from assumed exercise of options 328 1,098 Diluted weighted average shares 28,638 30,034 outstanding NET EARNINGS PER SHARE: Basic $ .32 $ .41 Diluted $ .32 $ .39