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 * Gerst Carl 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)
EVP, Vision & ID Products
(Last)         (First)         (Middle)
1 VISION DRIVE
3. Date of Earliest Transaction (MM/DD/YYYY)
2/23/2021
(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
Common Stock  2/23/2021    M    25000  A $38.39  25000  D   
Common Stock  2/23/2021    S    25000  D $82.7577  0  D   
Common Stock  2/23/2021    M    30000  A $56.44  30000  D   
Common Stock  2/23/2021    S    30000  D $82.7577  0  D   
Common Stock  2/23/2021    M    40000  A $51.49  40000  D   
Common Stock  2/23/2021    S    40000  D $82.7577  0  D   
Common Stock  2/23/2021    M    20000  A $50.94  20000  D   
Common Stock  2/23/2021    S    20000  D $82.7577  0  D   

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)  $38.39  2/23/2021    M        25000   2/21/2021  2/21/2027  Common Stock  25000  $0.0  0  D   
Non-Qualified Stock Option (right to buy)  $50.94  2/23/2021    M        20000   2/18/2021  2/18/2030  Common Stock  20000  $0.0  80000  D   
Non-Qualified Stock Option (right to buy)  $51.49  2/23/2021    M        40000   2/19/2020  2/19/2029  Common Stock  40000  $0.0  60000  D   
Non-Qualified Stock Option (right to buy)  $56.44  2/23/2021    M        30000   2/20/2019  2/20/2028  Common Stock  30000  $0.0  20000  D   
Non-Qualified Stock Option (right to buy)  $65.9                  10/30/2025  10/30/2030  Common Stock  150000    150000  D   

Explanation of Responses:

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Gerst Carl
1 VISION DRIVE
NATICK, MA 01760


EVP, Vision & ID Products

Signatures
Carl Gerst 2/24/2021
**Signature of Reporting Person Date
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