Exhibit 11.1 Neurogen Corporation Computation of Net Earnings (Loss) Per Common Share (in thousands, except Net Earnings (Loss) per Common Share amounts) Three Months Three Months Nine Months Nine Months Ended Ended Ended Ended Sept. 30, 1995 Sept. 30, 1994 Sept. 30, 1995 Sept. 30, 1994 (Unaudited) (Unaudited) (Unaudited) (Unaudited) -------------- -------------- -------------- -------------- Primary: Weighted average shares of common stock outstanding 11,359 10,080 10,532 9,346 Dilutive effect of: Warrants (1) - - 37 - Stock options (1) - - 1,031 - ------- ------- ------- ------- Common and common equivalent shares 11,359 10,080 11,600 9,346 ======= ======= ======= ======= Net income (loss) $(1,040) $(1,669) $ 9,494 $(5,234) ======= ======= ======= ======= Earnings (loss) per common equivalent shares (1) $ (0.09) $ (0.17) $ 0.82 $ (0.56) ======= ======= ======= ======= Fully diluted: Weighted average shares of common stock outstanding 11,359 10,080 10,532 9,346 Dilutive effect of: Warrants (1) - - 42 - Stock options (1) - - 1,482 - ------- ------- ------- ------- Common and common equivalent shares 11,359 10,080 12,056 9,346 ======= ======= ======= ======= Net income (loss) $(1,040) $(1,669) $ 9,494 $(5,234) ======= ======= ======= ======= Earnings (loss) per common and common equivalent shares (1) $ - $ - $ 0.79 $ - ======= ======= ======= ======= (1) The common stock equivalents have not been included in periods with losses as their inclusion would be antidilutive.