1 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 1, May 2, May 1, May 2, 1999 1998 1999 1998 NET EARNINGS Basic net earnings $ 11,105 $ 8,863 $ 20,262 $ 15,884 Add: Distributions on Preferred Securities, net of tax 305 - 305 - Diluted net earnings 11,410 8,863 20,567 15,884 WEIGHTED AVERAGE SHARES OUTSTANDING Basic weighted average common shares outstanding 26,895 26,764 26,895 26,611 Add: Shares issuable from assumed conversion of Preferred Stock 1,025 - 513 - Add: Shares issuable from assumed exercise of options 1,853 1,964 1,852 1,834 Diluted weighted average 29,773 28,728 29,260 28,445 shares outstanding NET EARNINGS PER SHARE Basic $ .41 $ .33 $ .75 $ .60 Diluted $ .38 $ .31 $ .70 $ .56