FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      
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
__X__ Officer (give title below)    _____ Other (specify below)
CEO & President
(Last)         (First)         (Middle)
ONE VISION DRIVE
3. Date of Earliest Transaction (MM/DD/YYYY)
2/16/2021
(Street)
NATICK, MA 01760
(City)       (State)       (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)
 
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. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. 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 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 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)  $90.5  2/16/2021    A     123521      2/16/2022 (1) 2/16/2031  Common Stock  123521  $0.0  123521  D   
Restricted Stock Unit  $0.0 (2) 2/16/2021    A     22608      2/16/2022 (3) 2/16/2024  Common Stock  22608  $0.0  22608  D   
Non-Qualified Stock Option (right to buy)  $38.39                  2/21/2018  2/21/2027  Common Stock  180000    180000  D   
Non-Qualified Stock Option (right to buy)  $50.94                  2/18/2021  2/18/2030  Common Stock  180000    180000  D   
Non-Qualified Stock Option (right to buy)  $51.49                  2/19/2020  2/19/2029  Common Stock  180000    180000  D   
Non-Qualified Stock Option (right to buy)  $56.44                  2/20/2019  2/20/2028  Common Stock  90000    90000  D   

Explanation of Responses:
(1)  The options vest in five approximately equal annual installments on the first, second, third, fourth, and fifth anniversaries of the Transaction Date.
(2)  Each restricted stock unit represents a contingent right to receive one share of Cognex Corporation common stock.
(3)  The restricted stock units vest approximately 20%, 30%, and 50% on the first, second, and third anniversaries of the Transaction Date, respectively.

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

Signatures
Robert Willett 2/18/2021
**Signature of Reporting Person Date
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