1 EXHIBIT 11 Proteon, Inc. Computation of Primary and Fully Diluted (Loss) Income Per Share (in thousands) Three months ended March 29, March 30, 1997 1996 --------- --------- Net (Loss) Income $ (313) $ 141 ======= ======= Weighted average number of common shares outstanding 15,545 15,741 Weighted average number of common equivalent shares - - ------- ------- Weighted average number of common and common equivalent shares outstanding used to calculate per share data 15,545 15,741 ======= ======= Net (loss) income per share: Primary $ (0.02) $ 0.01 ======= ======= Fully diluted $ (0.02) $ 0.01 ======= =======