EXHIBIT 11 SPARTECH CORPORATION AND SUBSIDIARIES STATEMENT RE COMPUTATION OF PER SHARE EARNINGS (In thousands, except per share data) QUARTER ENDED NINE MONTHS ENDED Aug. 4, July 29, Aug. 4, July 29, 2001 2000 2001 2000 NET EARNINGS Basic net earnings $ 4,659 $ 13,604 $ 23,337 $ 38,552 Add: Distributions on Preferred Securities, net of tax - * 1,563 2,086 * 3,380 Diluted net earnings 4,659 15,167 25,423 41,932 WEIGHTED AVERAGE SHARES OUTSTANDING Basic weighted average common shares outstanding 26,746 27,427 26,690 27,358 Add: Shares issuable from assumed conversion of Preferred Stock - * 4,578 2,071 * 3,382 Add: Shares issuable from assumed exercise of options 577 855 423 985 Diluted weighted average shares outstanding 27,323 32,860 29,184 31,725 NET EARNINGS PER SHARE Basic $ .17 $ .50 $ .87 $ 1.41 Diluted $ .17 $ .46 $ .87 $ 1.32 * - For the quarter ended August 4, 2001, the assumed conversion of convertible preferred securities was antidilutive, and, accordingly, those shares and the add-back of the distributions were excluded from the diluted earnings per share calculation.