Exhibit 11 NANOPHASE TECHNOLOGIES CORPORATION STATEMENTS REGARDING COMPUTATION OF LOSS PER SHARE Years ended December 31, --------------------------------------------- 2002 2001 2000 ---- ---- ---- Weighted average common shares outstanding 14,551,479 13,667,062 13,390,741 ============= ============= ============= Net loss $ (5,155,237) $ (5,740,243) $ (4,518,327) ============= ============= ============= Net loss per common share-basic and diluted $ (0.35) $ (0.42) $ (0.34) ============= ============= =============