1 EXHIBIT 11 Proteon, Inc. Computation of Primary and Fully Diluted (Loss) Income Per Share (in thousands) Six months ended June 28, June 29, 1997 1996 -------- -------- Net (Loss) $(1,446) $(2,204) ======= ======= Weighted average number of common shares outstanding 15,385 15,514 Weighted average number of common equivalent shares - - ------- ------- Weighted average number of common and common equivalent shares outstanding used to calculate per share data 15,385 15,514 ======= ======= Net (loss) per share: Primary $ (0.09) $ (0.14) ======= ======= Fully diluted $ (0.09) $ (0.14) ======= ======= No common share equivalents are included in the 1997 and 1996 calculations as their effect would be antidilutive.