1 EXHIBIT 11 COGNEX CORPORATION CALCULATION OF WEIGHTED AVERAGE COMMON AND COMMON EQUIVALENT SHARES OUTSTANDING Weighted average common and common share equivalents were computed as follows: THREE MONTHS ENDED SIX MONTHS ENDED JUNE 30, JULY 2, JUNE 30, JULY 2, 1996 1995 1996 1995 ---------- ---------- ---------- ---------- (UNAUDITED) (UNAUDITED) Weighted average common shares outstanding 40,558,441 37,784,780 40,446,624 37,709,664 Weighted average options outstanding ..... 6,572,834 7,661,964 6,862,869 7,738,794 Shares assumed to be purchased ........... (3,265,072) (4,186,292) (3,343,468) (4,357,560) ---------- ---------- ---------- ---------- Primary weighted average common and common equivalent shares outstanding ... 43,866,203 41,260,452 43,966,025 41,090,898 Dilutive effect of weighted average shares 532 373,614 531 574,634 ---------- ---------- ---------- ---------- Fully diluted weighted average common and common equivalent shares outstanding ... 43,866,735 41,634,066 43,966,556 41,665,532 ========== ========== ========== ========== 10