SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* Tuozzolo Claudio (Last) (First) (Middle) 25 FRONTAGE ROAD (Street) ANDOVER MA 01810 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol VICOR CORP [ vicr ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director 10% Owner X Officer (give title below) Other (specify below) Corp. Vice President
	3. Date of Earliest Transaction (Month/Day/Year) 09/15/2020
	4. If Amendment, Date of 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

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	09/15/2020		M		4,000	A	$8.062	56,912	D
Common Stock(1)	09/15/2020		S		2,030	D	$82.7623	54,882	D
Common Stock	09/15/2020		M		5,000	A	$8.05	59,882	D
Common Stock	09/15/2020		S		5,000	D	$82.7623	54,882	D
Common Stock	09/15/2020		S		1,124	D	$82.7623	53,758	D
Common Stock	09/16/2020		M		1,212	A	$8.05	54,970	D
Common Stock	09/16/2020		S		1,212	D	$83.4399	53,758	D
Common Stock	09/16/2020		M		6,103	A	$17.3038	59,861	D
Common Stock(1)	09/16/2020		S		3,468	D	$83.4204	56,393	D

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 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: 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	$8.062	09/15/2020		M			4,000	(2)	04/14/2024	Common Stock	4,000	$0	0	D
Non Qualified Stock Option	$8.05	09/15/2020		M			5,000	(2)	06/20/2024	Common Stock	5,000	$0	1,212	D
Non Qualified Stock Option	$8.05	09/16/2020		M			1,212	(2)	06/20/2024	Common Stock	1,212	$0	0	D
Non Qualified Stock Option	$17.3038	09/16/2020		M			6,103	(3)	09/13/2023	Common Stock	6,103	$0	1,525	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. This stock option is exercisable in full.

3. The remaining 1,525 stock options vest on 9/13/2021.

	/s/Richard J. Nagel Jr. Attorney in fact for Claudio Tuozzolo	09/17/2020
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
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