EXHIBIT 11 3D SYSTEMS CORPORATION COMPUTATION OF PER SHARE EARNINGS PRIMARY AND FULLY DILUTED COMPUTATION Three Month Periods Ended Nine Month Periods Ended -------------------------------------- -------------------------------------- September 27, 1996 September 26, 1997 September 27, 1996 September 26, 1997 ------------------ ------------------ ------------------ ------------------ PRIMARY EARNINGS PER SHARE Net income $ 1,015,404 $ (2,134,759) $ 2,937,715 $ (2,026,894) ------------ ------------- ------------ ------------- ------------ ------------- ------------ ------------- Applicable common and common stock equivalent shares: Weighted average number of shares of common stock outstanding during the period 11,336,475 11,410,734 11,313,810 11,382,533 Incremental number of shares outstanding during the period resulting from the assumed exercises of stock options and warrants 360,303 --- 448,932 --- ------------ ------------- ------------ ------------- Weighted average number of shares of common stock and common stock equivalents during the period 11,696,778 11,410,734 11,762,742 11,382,533 ------------ ------------- ------------ ------------- ------------ ------------- ------------ ------------- Primary earnings per share $ .09 $ (.19) $ .25 $ (.18) ------------ ------------- ------------ ------------- ------------ ------------- ------------ ------------- FULLY DILUTED EARNINGS PER SHARE Net income $ 1,015,404 $ (2,134,759) $ 2,937,715 $ (2,026,894) ------------ ------------- ------------ ------------- ------------ ------------- ------------ ------------- Applicable common and common stock equivalent shares: Weighted average number of shares of common stock outstanding during the period 11,336,475 11,410,734 11,313,810 11,382,533 Incremental number of shares outstanding during the period resulting from the assumed exercises of stock options and warrants 360,303 --- 449,541 --- ------------ ------------- ------------ ------------- Weighted average number of shares of common stock and common stock equivalents outstanding during the period 11,696,778 11,410,734 11,763,351 11,382,533 ------------ ------------- ------------ ------------- ------------ ------------- ------------ ------------- Fully diluted earnings per share $ .09 $ (.19) $ .25 $ (.18) ------------ ------------- ------------ ------------- ------------ ------------- ------------ -------------