FORM 3
        
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
INITIAL STATEMENT OF 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. Date of Event Requiring Statement (MM/DD/YYYY)
10/30/2020 

3. Issuer Name and Ticker or Trading Symbol COGNEX CORP [CGNX]
(Last)       (First)       (Middle)
1 VISION DRIVE
4. 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 /
(Street)
NATICK, MA 01760      
(City)             (State)             (Zip)
5. 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 Beneficially Owned
1.Title of Security
(Instr. 4)
2. Amount of Securities Beneficially Owned
(Instr. 4)
3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)
4. Nature of Indirect Beneficial Ownership
(Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 4)
2. Date Exercisable and Expiration Date
(MM/DD/YYYY)
3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)
4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)
6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Non-Qualified Stock Option (right to buy)  2/21/2021  2/21/2027  Common Stock  25000  $38.39  D   
Non-Qualified Stock Option (right to buy)  2/18/2021  2/18/2030  Common Stock  100000  $50.94  D   
Non-Qualified Stock Option (right to buy)  2/19/2020  2/19/2029  Common Stock  100000  $51.49  D   
Non-Qualified Stock Option (right to buy)  2/20/2019  2/20/2028  Common Stock  50000  $56.44  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 11/2/2020
**Signature of Reporting Person Date
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