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 3, May 4, May 3, May 4, 2003 2002 2003 2002 --------- -------- ---------- -------- NET EARNINGS Basic net earnings $ 10,541 $ 9,074 $ 16,699 $ 13,936 Add: Distributions on Preferred Securities, net of tax 516 512 - 512 --------- ------ ------- ------- Diluted net earnings $ 11,057 $ 9,586 $ 16,699 $ 14,448 ========= ======= ======= ======= WEIGHTED AVERAGE SHARES OUTSTANDING Basic weighted average common shares outstanding 29,235 26,868 29,242 26,809 Add: Shares issuable from assumed conversion of Preferred Stock 1,637 1,637 - 818 Add: Shares issuable from assumed exercise of options 230 554 242 511 -------- -------- -------- -------- Diluted weighted average shares outstanding 31,102 29,059 29,484 28,138 ======== ======== ======== ======== NET EARNINGS PER SHARE Basic $ .36 $ .34 $ .57 $ .52 ======== ======== ======== ======== Diluted $ .36 $ .33 $ .57 $ .51 ======== ======== ======== ========