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) VICOR CORPORATION 25 FRONTAGE RD. (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) 05/30/2018
	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	05/30/2018		A		9,480(1)	A	(1)	9,790	D
Common Stock	06/04/2018		M		2,558	A	$6.29	12,348	D
Common Stock	06/04/2018		S		2,558	D	$45.85	9,790	D
Common Stock	06/11/2018		M		6,356	A	$19.86	16,146	D
Common Stock	06/11/2018		S		4,564	D	$48.255	11,582	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	$19.86	05/30/2018		A		6,356		(2)	06/12/2018	Common Stock	6,356	(3)	6,356	D
Non Qualified Stock Option	$11.25	05/30/2018		A		67,604		(2)	11/01/2020	Common Stock	67,604	(3)	67,604	D
Non Qualified Stock Option	$12.57	05/30/2018		A		12,878		(2)	06/18/2022	Common Stock	12,878	(3)	12,878	D
Non Qualified Stock Option	$17.3	05/30/2018		A		7,628		(4)	09/13/2023	Common Stock	7,628	(3)	7,628	D
Non Qualified Stock Option	$8.06	05/30/2018		A		31,327		(5)	04/14/2024	Common Stock	31,327	(3)	31,327	D
Non Qualified Stock Option	$12.19	05/30/2018		A		6,356		(6)	07/21/2024	Common Stock	6,356	(3)	6,356	D
Non Qualified Stock Option	$8.06	05/30/2018		A		1,220		(7)	09/10/2024	Common Stock	1,220	(3)	1,220	D
Non Qualified Stock Option	$6.29	06/04/2018		M			2,558	(8)	06/17/2023	Common Stock	2,558	$0.00	13,137	D
Non Qualified Stock Option	$19.86	06/11/2018		M			6,356	(2)	06/12/2018	Common Stock	6,356	$0.00	0	D
Non Qualified Stock Option	$47.15	06/15/2018		A		1,061		(9)	06/15/2028	Common Stock	1,061	$0.00	1,061	D

Explanation of Responses:

1. Received in exchange for shares of Picor Corporation common stock in connection with the merger of Picor Corporation into Vicor Corporation (the "Merger").

2. This stock option is exercisable in full.

3. In the Merger, each outstanding stock option was amended to provide that it will be settled in shares of Vicor Corporation common stock, and to adjust the number of shares issuable pursuant to the Merger's exchange ratio.

4. This stock option becomes exercisable in five equal installments on 5/30/18, 9/13/18, 9/13/19, 9/13/20 and 9/13/21.

5. 25,061 stock options are exercisable at 5/30/18. The remaining 6,266 stock options become exercisable on 4/14/19.

6. This stock option becomes exercisable in five equal installments on 7/21/18, 7/21/19, 7/21/20, 7/21/21 and 7/21/22.

7. 732 stock options are exercisable at 5/30/18. The remaining 488 stock options vest in two equal installments on 9/10/18 and 9/10/19.

8. Granted on 6/17/2013 under the Company's Amended and Restated 2000 Stock Option and Incentive Plan and vest over a five year period.

9. Granted on 6/15/2018 under the Company's Amended and Restated 2000 Stock Option and Incentive Plan and vest over a five year period.

Remarks:

	/s/Richard J. Nagel Jr. Attorney in fact for Claudio Tuozzolo	06/19/2018
	** 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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