COGNEX CORP — Director's Dealing 2011

May 6, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: COGNEX CORP (CGNX)
CIK: 0000851205
Period of Report: 2011-05-04

Reporting Person: WASSERMAN REUBEN (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-05-04	Common Stock	M	10000	$21.195	Acquired	10000	Direct
2011-05-04	Common Stock	S	10000	$35.1485	Disposed	0	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-05-04	Non-Qualified Stock Option (right to buy)	$21.195	M	10000	Disposed	2013-04-02	Common Stock (10000)	Direct