TRIMBLE NAVIGATION LIMITED EXHIBIT 11.1 Computation of Earnings (Loss) Per Common Share Three Months Ended Nine Months Ended September 30, September 30, 1997 1996 1997 1996 - ------------------------------------------------------------------------------------------------------------------------------ (In thousands, except per share data) PRIMARY EARNINGS (LOSS) PER COMMON SHARE Computation of common and common equivalent shares outstanding: Common stock outstanding 22,364 22,029 22,170 21,833 Common stock options 642 - 405 - Common stock warrants 157 - 109 - --------------- --------------- ---------------- ---------------- Total weighted average common and dilutive common equivalent shares outstanding 23,163 22,029 22,684 21,833 =============== =============== ================ ================ Net income (loss) $ 1,592 $ (8,834) $ 6,886 $ (12,565) =============== =============== ================ ================ Primary earnings (loss) per share $ 0.07 $ (0.40) $ 0.30 $ (0.58) =============== =============== ================ ================ FULLY DILUTED EARNINGS (LOSS) PER COMMON SHARE Computation of common and common equivalent shares outstanding: Common stock outstanding 22,364 22,029 22,170 21,833 Common stock options 802 - 845 - Common stock warrants 177 - 177 - --------------- --------------- ---------------- ---------------- Total weighted average common and dilutive common equivalent shares outstanding 23,343 22,029 23,192 21,833 =============== =============== ================ ================ Net income (loss) $ 1,592 $ (8,834) $ 6,886 $ (12,565) =============== =============== ================ ================ Fully diluted earnings (loss) per share $ 0.07 $ (0.40) $ 0.30 $ (0.58) =============== =============== ================ ================ 112