EXHIBIT 11.1 SONUS PHARMACEUTICALS, INC. COMPUTATION OF NET INCOME (LOSS) PER SHARE
Three Months Ended Nine Months Ended September 30, September 30, ------------------------------- ------------------------------ 1997 1996 1997 1996 ----------- ----------- ----------- ----------- Net income (loss) ............................... $(1,122,176) $ 2,801,745 $ 639,604 $ (925,037) =========== =========== =========== =========== Weighted average shares outstanding ............. 8,573,029 8,490,201 8,573,029 8,467,100 Net effect of common stock equivalents using the treasury stock method ............ -- 640,790 593,861 -- ----------- ----------- ----------- ----------- Shares used in computation of net income (loss) per share .................... 8,573,029 9,130,991 9,166,890 8,467,100 ----------- ----------- ----------- ----------- Net income (loss) per share ..................... $ (0.13) $ 0.31 $ 0.07 $ (0.11) =========== =========== =========== ===========