EXHIBIT 11 SPARTECH CORPORATION AND SUBSIDIARIES STATEMENT RE COMPUTATION OF PER SHARE EARNINGS (In thousands, except per share data) QUARTER ENDED January 29, January 30, 2000 1999 NET EARNINGS Basic net earnings $11,167 $ 9,157 Add: Distributions on Preferred Securities, net of tax 488 - Diluted net earnings 11,655 9,157 WEIGHTED AVERAGE SHARES OUTSTANDING Basic weighted average common shares outstanding 27,299 26,398 Add: Shares issuable from assumed conversion of Preferred Stock 1,637 - Add: Shares issuable from assumed exercise of options 1,098 1,852 Diluted weighted average shares 30,034 28,748 outstanding NET EARNINGS PER SHARE: Basic $ .41 $ .34 Diluted $ .39 $ .32