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SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, DC 20549
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SCHEDULE 13G
INFORMATION STATEMENT PURSUANT TO RULES 13d-1 and 13d-2
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 6)
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)
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CUSIP No. 925815 10 2 13G Page 2 of 6 Pages
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1. NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
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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5. SOLE VOTING POWER 20,984,151
NUMBER OF -------------------------------------------------------
SHARES 6. SHARED VOTING POWER 0
BENEFICIALLY
OWNED BY -------------------------------------------------------
EACH 7. SOLE DISPOSITIVE POWER 20,984,151
REPORTING
PERSON WITH -------------------------------------------------------
8. SHARED DISPOSITIVE POWER 0
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9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
20,984,151
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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
49.0%
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12. TYPE OF REPORTING PERSON*
IN
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CUSIP No. 925815 10 2 13G Page 3 of 6 Pages
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Item 1(a). Name of Issuer:
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Vicor Corporation
Item 1(b). Address of Issuer's Principal Executive Offices:
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23 Frontage Road, Andover, MA 01810
Item 2(a). Name of Person Filing:
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Patrizio Vinciarelli
Item 2(b). Address of Principal Business Office or, if None, Residence:
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Vicor Corporation, 23 Frontage Road, Andover, MA 01810
Item 2(c). Citizenship:
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United States
Item 2(d) Title of Class of Securities:
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Common Stock, par value $.01 per share
Item 2(e) CUSIP Number:
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925815 10 2
Item 3. If this statement is filed pursuant to Rules 13d-1(b), or
13d-2(b), check whether the person filing is a:
Not applicable
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CUSIP No. 925815 10 2 13G Page 4 of 6 Pages
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Item 4. Ownership.
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If the percent of the class owned, as of December 31 of the year covered by
the statement, or as of the last day of any month described in Rule 13d-1
(b)(2), if applicable, exceeds five percent, provide the following information
as of that date and identify those shares which there is a right to acquire.
(a) Amount beneficially owned: 20,984,151
(this amount includes 3,515 shares which the Reporting Person has
the right to acquire upon the exercise of options to purchase
Common Stock)
(b) Percent of class:
49.0%
(c) Number of shares as to which such person has:
(i) Sole power to vote or to direct the vote: 20,984,151
As of December 31, 1997, Mr. Vinciarelli was the beneficial owner
of 9,960,503 shares of Vicor Corporation Common Stock.
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.
(ii) Shared power to vote or to direct the vote: 0
(iii) Sole power to dispose or to direct the disposition of: 20,984,151
(iv) Shared power to dispose or to direct the disposition of: 0
Item 5. Ownership of Five Percent or Less of a Class.
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Not applicable.
Item 6. Ownership of More than Five Percent on Behalf of Another Person.
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Not applicable.
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CUSIP No. 925815 10 2 13G Page 5 of 6 Pages
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Item 7. Identification and Classification of the Subsidiary Which Acquired the
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Security Being Reported on by the Parent Holding Company.
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Not applicable.
Item 8. Identification and Classification of Members of the Group.
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Not applicable.
Item 9. Notice of Dissolution of Group.
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Not applicable.
Item 10. Certification.
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Not applicable.
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CUSIP No. 925815 10 2 13G 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 21, 1998 /s/ Patrizio Vinciarelli
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Name: Patrizio Vinciarelli
Title: Chairman of the Board, President and
Chief Executive Officer
