IGEN INTERNATIONAL, INC. EXHIBIT 11.1 STATEMENT RE: COMPUTATION OF NET INCOME PER SHARE (UNAUDITED, IN THOUSANDS, EXCEPT PER SHARE DATA) THREE MONTHS ENDED NINE MONTHS ENDED DECEMBER 31, DECEMBER 31, 1996 1995 1996 1995 ------- ------- ------- ------- Average common shares outstanding: 14,969 14,771 14,955 14,742 ------- ------- ------- ------- Net loss $(2,237) $(1,838) $(5,471) $(5,627) ======= ======= ======= ======= Net loss per share $ (.15) $ (.12) $ (.37) $ (.38) ======= ======= ======= =======