EXHIBIT 11 SPARTECH CORPORATION AND SUBSIDIARIES STATEMENT RE COMPUTATION OF PER SHARE EARNINGS (In thousands, except per share data) QUARTER ENDED SIX MONTHS ENDED May 4, May 5, May 4, May 5, 2002 2001 2002 2001 NET EARNINGS Basic net earnings $ 9,074 $ 10,123 $ 13,936 $ 18,678 Add: Distributions on Preferred Securities, net of tax 512 1,584 512 2,086 Diluted net earnings 9,586 11,707 14,448 20,764 WEIGHTED AVERAGE SHARES OUTSTANDING Basic weighted average common shares outstanding 26,868 26,652 26,809 26,663 Add: Shares issuable from assumed conversion of Preferred Stock 1,637 4,578 818 3,107 Add: Shares issuable from assumed exercise of options 554 363 511 345 Diluted weighted average shares outstanding 29,059 31,592 28,138 30,116 NET EARNINGS PER SHARE Basic $ .34 $ .38 $ .52 $ .70 Diluted $ .33 $ .37 $ .51 $ .69