COGNEX CORP — Director's Dealing 2011

Aug 31, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: COGNEX CORP (CGNX)
CIK: 0000851205
Period of Report: 2011-08-29

Reporting Person: SHILLMAN ROBERT J (Director, Chairman of the Board)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-08-29	Common Stock	M	24000	$21.74	Acquired	3559506	Direct
2011-08-29	Common Stock	S	24000	$35.3742	Disposed	3535506	Direct
2011-08-29	Common Stock	M	41250	$21.195	Acquired	3576756	Direct
2011-08-29	Common Stock	S	41250	$35.3742	Disposed	3535506	Direct
2011-08-29	Common Stock	M	42500	$21.66	Acquired	3578006	Direct
2011-08-29	Common Stock	S	42500	$35.3742	Disposed	3535506	Direct
2011-08-29	Common Stock	M	7000	$18.7	Acquired	3542506	Direct
2011-08-29	Common Stock	S	7000	$35.3742	Disposed	3535506	Direct
2011-08-30	Common Stock	M	19250	$18.7	Acquired	3554756	Direct
2011-08-30	Common Stock	S	19250	$35.4843	Disposed	3535506	Direct
2011-08-30	Common Stock	M	15750	$18.7	Acquired	3551256	Direct
2011-08-30	Common Stock	S	15750	$35.4843	Disposed	3535506	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-08-29	Non-Qualified Stock Option (right to buy)	$18.7	M	7000	Disposed	2018-02-19	Common Stock (7000)	Direct
2011-08-30	Non-Qualified Stock Option (right to buy)	$18.7	M	19250	Disposed	2018-02-19	Common Stock (19250)	Direct
2011-08-30	Non-Qualified Stock Option (right to buy)	$18.7	M	15750	Disposed	2018-02-19	Common Stock (15750)	Direct
2011-08-29	Non-Qualified Stock Option (right to buy)	$21.195	M	41250	Disposed	2013-04-02	Common Stock (41250)	Direct
2011-08-29	Non-Qualified Stock Option (right to buy)	$21.66	M	42500	Disposed	2017-01-29	Common Stock (42500)	Direct
2011-08-29	Non-Qualified Stock Option (right to buy)	$21.74	M	24000	Disposed	2012-02-11	Common Stock (24000)	Direct