Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * Willett Robert 2. Issuer Name and Ticker or Trading Symbol COGNEX CORP [CGNX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) ONE VISION DRIVE 3. Date of Earliest Transaction (Month/Day/Year) 10/21/2025 (Street) NATICK, MA 01760 4. If Amendment, Date 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 (City) (State) (Zip) 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 10/21/2025 M(1) 6,704 A $38.39 6,704 D Common Stock 10/21/2025 S(1) 6,704 D $49.5062 0 D Common Stock 15,804 I by Trust(2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 Underlying Securities (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 of Derivative Security: 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)

$38.39

10/21/2025

M(1)

6,704

02/21/2018

02/21/2027

Common Stock

6,704

$ 0

173,296

D

Non-Qualified Stock Option (right to buy)

$33.04

02/18/2026

02/18/2035

Common Stock

193,201

193,201

D

Non-Qualified Stock Option (right to buy)

$39.44

02/20/2025

02/20/2034

Common Stock

298,150

298,150

D

Non-Qualified Stock Option (right to buy)

$47.21

02/21/2024

02/21/2033

Common Stock

233,484

233,484

D

Non-Qualified Stock Option (right to buy)

$50.94

02/18/2021

02/18/2030

Common Stock

180,000

180,000

D

Non-Qualified Stock Option (right to buy)

$51.49

02/19/2020

02/19/2029

Common Stock

180,000

180,000

D

Non-Qualified Stock Option (right to buy)

$56.44

02/20/2019

02/20/2028

Common Stock

90,000

90,000

D

Non-Qualified Stock Option (right to buy)

$64.43

02/22/2023

02/22/2032

Common Stock

185,254

185,254

D

Non-Qualified Stock Option (right to buy)

$90.50

02/16/2022

02/16/2031

Common Stock

123,521

123,521

D

Restricted Stock Unit

$ 0

02/18/2026

02/18/2028

Common Stock

70,824

70,824

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Willett Robert ONE VISION DRIVE NATICK, MA 01760	X

Signatures

Robert Willett		10/22/2025
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	These stock option exercises were effected pursuant to a trading plan adopted by the reporting person in accordance with Rule 10b5-1 under the Securities Exchange Act of 1934, as amended.
(2)	The reporting person is a trustee and beneficiary of Willett Parkhill Investment Trust dated August 2, 2010. The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purpose.

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