SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, DC 20549
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SCHEDULE 13G/A
Under the Securities and Exchange Act of 1934
(Amendment No. 15)
VICOR CORPORATION
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(Name of Issuer)
Common Stock, Par Value $.01 Per Share
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(Title of Class of Securities)
925815 10 2
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(CUSIP Number)
December 31, 2007
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(Date of Event Which Requires filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this
Schedule is filed:
[ ] Rule 13d-1 (b)
[ ] Rule 13d-1 (c)
[X] Rule 13d-1 (d)
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CUSIP No. 925815 10 2 13G/A Page 2 of 6 Pages
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1. NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
Patrizio Vinciarelli
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2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ]
(b) [ ]
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3. SEC USE ONLY
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4. CITIZENSHIP OR PLACE OF ORGANIZATION
United States
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NUMBER OF 5. SOLE VOTING POWER 20,703,339
SHARES
BENEFICIALLY ------------------------------------------------------------
OWNED BY
EACH 6. SHARED VOTING POWER 0
REPORTING
PERSON WITH ------------------------------------------------------------
7. SOLE DISPOSITIVE POWER 20,703,339
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8. SHARED DISPOSITIVE POWER 0
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9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
20,703,339
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10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES [ ]
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11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
50.7%
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12. TYPE OF REPORTING PERSON
IN
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CUSIP No. 925815 10 2 13G/A Page 3 of 6 Pages
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ITEM 1(A). NAME OF ISSUER:
Vicor Corporation
ITEM 1(B). ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:
25 Frontage Road, Andover, MA 01810
ITEM 2(A). NAME OF PERSON FILING:
Patrizio Vinciarelli
ITEM 2(B). ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE:
Vicor Corporation, 25 Frontage Road, Andover, MA 01810
ITEM 2(C). CITIZENSHIP:
United States
ITEM 2(D) TITLE OF CLASS OF SECURITIES:
Common Stock, par value $.01 per share
ITEM 2(E) CUSIP NUMBER:
925815 10 2
ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO RULE 13D-1(B),
OR 13D-2(B) OR (C), CHECK WHETHER THE PERSON FILING IS A:
Not applicable
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CUSIP No. 925815 10 2 13G/A Page 4 of 6 Pages
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ITEM 4. OWNERSHIP.
Provide the following information regarding the aggregate number and
percentage of the class of securities of the issuer identified in Item 1.
(a) Amount beneficially owned: 20,703,339
As of December 31, 2007, Mr. Vinciarelli was the beneficial owner
of 9,679,691 shares of Vicor Corporation Common Stock (which
number includes 22,877 shares which Mr. Vinciarelli has the right
to acquire upon the exercise of options to purchase Common Stock
within 60 days of December 31, 2007). Additionally, he owned
11,023,648 shares of Vicor Corporation Class B Common Stock,
which may be converted at any time into 11,023,648 shares of
Common Stock.
(b) Percent of class:
50.7%
(c) Number of shares as to which such person has:
(i) Sole power to vote or to direct the vote: 20,703,339
(ii) Shared power to vote or to direct the vote: 0
(iii) Sole power to dispose or to direct the disposition
of: 20,703,339
(iv) Shared power to dispose or to direct the disposition
of: 0
ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.
Not applicable.
ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER
PERSON.
Not applicable.
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CUSIP No. 925815 10 2 13G/A Page 5 of 6 Pages
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ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH
ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING
COMPANY.
Not applicable.
ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.
Not applicable.
ITEM 9. NOTICE OF DISSOLUTION OF GROUP.
Not applicable.
ITEM 10. CERTIFICATION.
Not applicable.
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CUSIP No. 925815 10 2 13G/A Page 6 of 6 Pages
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SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.
Dated: January 30, 2008 /s/ Patrizio Vinciarelli
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Name: Patrizio Vinciarelli
Title: Chairman of the Board,
President and Chief
Executive Officer