IGEN International, Inc. Form 10-Q For the Quarter Ended September 30, 1997 EXHIBIT 11.1 Statement Re: Computation of Net Loss Per Share (In thousands, except per share data) THREE MONTHS ENDED SIX MONTHS ENDED SEPTEMBER 30, SEPTEMBER 30 -------------------- -------------------- 1997 1996 1997 1996 --------- --------- --------- --------- Average Common Shares Outstanding:.................................... $15,107 $14,958 $15,053 $14,941 --------- --------- --------- --------- --------- --------- --------- --------- Net Loss.............................................................. $(1,564) $(1,710) $(4,435) $(3,234) --------- --------- --------- --------- --------- --------- --------- --------- Net loss per share.................................................... $ (.10) $ (.11) $ (.29) $ (.22) --------- --------- --------- --------- --------- --------- --------- --------- 1