SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* Ceyrolle Eric (Last) (First) (Middle) 32, ROUTE DE ST NOM 78620 L'ETANG LA VILLE (Street) L'ETANG LA VILLE I0 78620 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol COGNEX CORP [ CGNX ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) Executive VP of Worldwide
	3. Date of Earliest Transaction (Month/Day/Year) 10/27/2006
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	10/27/2006		M		10,000	A	$18.125	10,000	D
Common Stock	10/27/2006		S		10,000	D	$23.3341	0	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Non-Qualified Stock Option (right to buy)	$18.125	10/27/2006		M			10,000	10/27/2006(1)	12/21/2015	Common Stock	10,000	$23.3341	5,000	D
Non-Qualified Stock Option (right to buy)	$21.195							(2)	02/04/2018	Common Stock	22,500		22,500	D
Non-Qualified Stock Option (right to buy)	$21.74							(3)	02/11/2012	Common Stock	20,000		20,000	D
Non-Qualified Stock Option (right to buy)	$22.685							(4)	03/13/2011	Common Stock	1,071		1,071	D
Non-Qualified Stock Option (right to buy)	$24.595							(5)	08/21/2016	Common Stock	86,000		86,000	D
Non-Qualified Stock Option (right to buy)	$25.02							(6)	01/10/2020	Common Stock	22,500		22,500	D
Non-Qualified Stock Option (right to buy)	$28.67							(7)	01/05/2019	Common Stock	32,500		32,500	D
Non-Qualified Stock Option (right to buy)	$28.954							(8)	04/27/2014	Common Stock	19,000		19,000	D
Non-Qualified Stock Option (right to buy)	$29.38							(9)	01/30/2021	Common Stock	22,500		22,500	D
Non-Qualified Stock Option (right to buy)	$30.813							(10)	12/14/2014	Common Stock	17,000		17,000	D

Explanation of Responses:

1. The option is exercisable in five annual installments. The first installment became exercisable on April 27, 2003. One thousand shares of this first installment remain exercisable. The next three installments each for three thousand shares became exercisable on April 27, 2004, April 27, 2005 and April 27, 2006. The last installment (5000 shares) becomes exercisable on April 27, 2007.

2. This option becomes exercisable in one installment on January 1, 2007

3. This option is exercisable in four installments. The first installment for eight thousand shares became exercisable on January 1, 2003. The second, third and fourth installments each for four thousand shares became exercisable on January 1, 2004, January 1, 2005, and January 1, 2006.

4. This option became exercisable in one installment on April 1, 2002.

5. This option vests in six equal installments commencing on August 21, 2007.

6. This option becomes exercisable in one installment on January 1, 2009.

7. This option becomes exercisable in two separate installments. Twenty-two thousand five hundred shares become exercisable on January 1, 2008. Ten thousand shares become exercisable on January 5, 2008.

8. This option is exercisable in three installments. The first installment for one thousand shares became exercisable on April 27, 2003. The second installment for one thousand shares became exercisable on April 27, 2004. The third installment for seventeen thousand shares became exercisable on April 27, 2005.

9. This option becomes exercisable in one installment on January 1, 2010.

10. This option became exercisable in one installment on April 27, 2006.

	Eric Ceyrolle	10/30/2006
	** Signature of Reporting Person	Date
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