UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
(Amendment No. 5)
Vicor Corp.
(Name of Issuer)
COMMON STOCK
(Title of Class of Securities)
925815102
(CUSIP Number)
December 31, 2002
(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)
[ X] Rule 13d-1(c)
[ ] Rule 13d-1(d)
*The remainder of this cover page shall be filled out for a
reporting person?s initial filing on this form with respect to the
subject class of securities, and for any subsequent amendment
containing information which would alter the disclosures
provided in a prior cover page.
The information required in the remainder of this cover page
shall not be deemed to be ?filed? for the purpose of Section 18
of the Securities Exchange Act of 1934 (?Act?) or otherwise
subject to the liabilities of that section of the Act but shall be
subject to all other provisions of the Act (however, see the Notes).
CUSIP No. 925815102
1. NAME OF REPORTING PERSONS
I.R.S. Identification Nos. of above
persons (entities only).
David R. Wilmerding, III
2. CHECK THE APPROPRIATE LETTER IF A MEMBER OF A GROUP:
(a)
(b)
3. SEC USE ONLY
4. CITIZENSHIP OR PLACE OF ORGANIZATION
Maryland
Number of 5. SOLE VOTING POWER:
Shares 138,500
Beneficially
Owned by 6. SHARED VOTING POWER:
Each 1,486,989
Reporting
Person With 7. SOLE DISPOSITIVE POWER:
138,500
8. SHARED DISPOSITIVE POWER:
1,486,989
9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON:
1,625,489
10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES:
11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9):
5.3%
12. TYPE OF REPORTING PERSON:
IN
ITEM 1.
(a) Name of Issuer:
Vicor Corp.
(b) Address of Issuer?s Principal Executive Offices:
25 Frontage Road
Andover, MA 01810
ITEM 2.
(a) Name of Person Filing:
David R. Wilmerding, III
(b) Address of Principal Business Office or, if none, Residence:
1119 St. Paul St., Baltimore MD 21202
(c) Citizenship: USA
(d) Title of Class of Securities:
COMMON STOCK
(e) CUSIP Number:
925815102
ITEM 3. If this statement is filed pursuant to Sections 240.13d-1(b)
or 240.13d-2(b) or (c), check whether the person filing is a:
(a) [ ] Broker or dealer registered under Section 15
of the Act (15 U.S.C. 78o).
(b) [ ] Bank as defined in Section 3(a)(6) of the
Act (15 U.S.C. 78c).
(c) [ ] Insurance company as defined in Section 3(a)(19)
of the Act (15 U.S.C. 78c).
(d) [ ] Investment company registered under Section 8
of the Investment Company Act of 1940 (15 U.S.C 80a-8).
(e) [ ] An investment adviser in accordance with
Section 240.13d-1(b)(1)(ii)(E);
(f) [ ] An employee benefit plan or endowment fund
in accordance with Section 240.13d-1(b)(1)(ii)(F);
(g) [ ] A parent holding company or control person in
accordance with Section 240.13d-1(b)(1)(ii)(G);
(h) [ ] A savings associations as defined in Section 3(b)
of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i) [ ] A church plan that is excluded from the definition
of an investment company under Section 3(c)(14) of
the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j) [ ] Group, in accordance with
Section 240.13d-1(b)(1)(ii)(J).
ITEM 4. Ownership
(a) Amount Beneficially Owned:
1,625,489
(b) Percent of Class:
5.3%
(c) Number of shares as to which the person has:
(i) sole power to vote or to direct vote:
138,500
(ii) shared power to vote or to direct the vote:
1,486,989
(iii) sole power to dispose or to direct the disposition of:
138,500
(iv) shared power to dispose or to direct the disposition:
1,486,989
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
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
(c) The following certification shall be included if the statement
is filed pursuant to 240.13d-1(c):
By signing below I certify that, to the best of my knowledge
and belief, the securities referred to above were not acquired
and are not held for the purpose of or with the effect of changing
or influencing the control of the issuer of the securities and were
not acquired and are not held in connection with or as a participant
in any transaction having that purpose or effect.
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.
02/12/2003
------------------------------------------------
Date
/s/ David R. Wilmerding, III
-------------------------------------------------
David R. Wilmerding, III
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