EXHIBIT 11.01 ADVANCED TECHNOLOGY MATERIALS, INC. COMPUTATION OF EARNINGS PER COMMON SHARE Quarter Ended Quarter Ended 3/31/97 3/31/96 ------- ------- Net income .................................. $1,106,571 $ 469,446 ========== ========== Average common shares outstanding ................................ 8,791,194 8,722,064 Incremental shares issuable pursuant to employee stock options and warrants (if dilutive) .................................. 801,309 609,602 ========== ========== Total shares ..................................... 9,592,503 9,331,666 ========== ========== Net income per share ...................................... $ 0.12 $ 0.05 ========== ==========