IGEN International, Inc. Form 10-Q For the Quarter Ended December 31, 1997 EXHIBIT 11.1 Statement Re: Computation of Net Loss Per Share (In thousands, except per share data) THREE MONTHS ENDED NINE MONTHS ENDED DECEMBER 31, DECEMBER 31 -------------------- -------------------- 1997 1996 1997 1996 --------- --------- --------- --------- Average Common Shares Outstanding:..................... $ 15,157 $ 14,969 $ 15,082 $ 14,955 --------- --------- --------- --------- --------- --------- --------- --------- Net Loss............................................... $ (3,039) $ (2,237) $ (8,996) $ (5,471) --------- --------- --------- --------- --------- --------- --------- --------- Basic and Fully Diluted Net loss per share............. $ (.20) $ (.15) $ (.60) $ (.37) --------- --------- --------- --------- --------- --------- --------- --------- 1