Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  McNamara Michael
 2. Date of Event Requiring Statement (Month/Day/Year)
05/02/2011		 3. Issuer Name and Ticker or Trading Symbol
VICOR CORP [vicr]
(Last)
(First)
(Middle)
25 FRONTAGE RD		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
VP Quality & Tech Ops.
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

ANDOVER, MA 01810		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
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)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 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 (1)   (1) 04/16/2013 Common Stock 600 $ 6.07 D  
Non Qualified Stock Option   (2) 08/27/2020 Common Stock 25,000 $ 13.73 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
McNamara Michael
25 FRONTAGE RD
ANDOVER, MA 01810		       VP Quality & Tech Ops.  

Signatures

/s/Richard J. Nagel Jr. Attorney in Fact for Michael S. McNamara 04/03/2012
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Granted under the Company's Amended and Restated 2000 Stock Option and Incentive Plan and vest over a five year period.
(2) Granted under the Company's Amended and Restated 2000 Stock Option and Incentive Plan and vest when certain defined revenue performance milestones for the Company's BBU are achieved.
 
Remarks:
Due to an inadvertent administrative error, this Form 3 was not filed timely.  Since May 2, 2011, the reporting person has not acquired or disposed of securities of the issuer.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.