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 * Gusinov Alex 2. Issuer Name and Ticker or Trading Symbol VICOR CORP [ vicr ] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable)_____ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
Corp. Vice President Eng.
(Last)         (First)         (Middle)
25 FRONTAGE RD.
3. Date of Earliest Transaction (MM/DD/YYYY)
9/14/2020
(Street)
ANDOVER, MA 01810
(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  9/14/2020    M    1222  A $17.3038  19860  D   
Common Stock (1) 9/14/2020    S    669  D $82.5  19191  D   
Common Stock  9/14/2020    M    458  A $12.1913  19649  D   
Common Stock (1) 9/14/2020    S    234  D $82.5  19415  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  $17.3038  9/14/2020    M        1222    (2) 9/13/2023  Common Stock  1222  $0  1220  D   
Non Qualified Stock Option  $12.1913  9/14/2020    M        458    (3) 7/21/2024  Common Stock  458  $0  914  D   

Explanation of Responses:
(1)  This transaction involved the exercise of non-qualified stock options, the terms of which provided for the purchase of shares of common stock possessing multi-year restrictions on their sale or transfer. As such, the exercise followed the sell-to-cover process, whereby a portion of the shares acquired through the exercise were sold in the open market, with the proceeds used to fund the aggregate exercise price of the options and the income and employment taxes associated with the exercise. The balance of the shares acquired through exercise that were delivered to the reporting person are subject to holding periods through the fifth anniversary of the date of this transaction.
(2)  The remaining 1,220 stock options vest on 9/13/2021.
(3)  The remaining 914 stock options vest on 7/21/2021 and 7/21/2022.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Gusinov Alex
25 FRONTAGE RD.
ANDOVER, MA 01810


Corp. Vice President Eng.

Signatures
/s/Richard J. Nagel Jr. Attorney in fact for Alex Gusinov 9/16/2020
**Signature of Reporting Person Date
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