EXHIBIT 11 SPARTECH CORPORATION AND SUBSIDIARIES STATEMENT RE COMPUTATION OF PER SHARE EARNINGS (In thousands, except per share data) QUARTER ENDED February 2, February 3, 2002 2001 NET EARNINGS Basic net earnings $ 4,862 $ 8,555 Add: Distributions on Preferred Securities, net of tax - 502 Diluted net earnings $ 4,862 $ 9,057 WEIGHTED AVERAGE SHARES OUTSTANDING Basic weighted average common shares outstanding 26,751 26,673 Add: Shares issuable from assumed conversion of Preferred Stock - 1,637 Add: Shares issuable from assumed exercise of options 468 328 Diluted weighted average shares 27,219 28,638 outstanding NET EARNINGS PER SHARE: Basic $ .18 $ .32 Diluted $ .18 $ .32