DESKTOP DATA, INC. AND SUBSIDIARIES EXHIBIT 11.1 COMPUTATION OF EARNINGS PER SHARE (UNAUDITED) Three Months Ended Six Months Ended June 30, June 30, 1996 1995 1996 1995 ---- ---- ---- ---- Net income $ 1,023 $ 327 $ 1,863 $ 603 Accretion of dividends on Series B redeemable preferred stock - (34) - (68) ------- ------ ------- ------ Net income available for common stockholders $ 1,023 $ 293 $ 1,863 $ 535 ======= ====== ======= ====== Weighted average common shares outstanding 8,565 2,647 8,545 2,673 Weighted average shares to reflect the conversion of Series A, Series C, and Series D preferred stock as of the beginning of the period - 3,847 - 3,847 Weighted average shares to be issued sufficient to generate proceeds for the payment of dividends on the Series A preferred stock payable upon the Initial Public Offering - 169 - 191 Common stock options issued after July 1, 1994, pursuant to the treasury stock method - 50 - 50 Common stock equivalents outstanding, pursuant to the treasury stock method (1) 274 158 242 161 ------- ------ ------- ------ Weighted average number of common and common equivalent shares outstanding in 1996; Pro forma weighted average number of common and common equivalent shares outstanding in 1995 8,839 6,871 8,787 6,922 ------- ------ ------- ------ Net income per common and common equivalent share in 1996; Pro forma net income per common and common equivalent share in 1995 $ 0.12 $ 0.04 $ 0.21 $ 0.08 ======= ====== ======= ====== (1) For 1995, includes common stock options issued after July 1, 1994, pursuant to the treasury stock method, in accordance with Securities and Exchange Commission Rules. 16