IGEN INTERNATIONAL, INC. FORM 10-Q/A FOR THE QUARTER ENDED JUNE 30, 1997 EXHIBIT 11.1 STATEMENT RE: COMPUTATION OF NET INCOME PER SHARE (IN THOUSANDS, EXCEPT PER SHARE DATA) THREE MONTHS ENDED JUNE 30, -------------------- 1997 1996 --------- --------- Primary and Fully Diluted :...................... 15,013 14,924 --------- --------- Net Loss......................................... $ (3,671) $ (1,524) --------- --------- --------- --------- Loss per share................................... $ (.24) $ (.10) --------- --------- --------- --------- 13