UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC  20549

SCHEDULE 13G


Under the Securities Exchange Act of 1934
(Amendment No. 4)

Vicor Corp.
(Name of Issuer)

COMMON STOCK
(Title of Class of Securities)

925815102
(CUSIP Number)

December 31, 2001
(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).
		Nevis Capital Management LLC
		52-2305075

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				0
Beneficially
Owned by	6.		SHARED VOTING POWER:
Each				2,317,973
Reporting
Person With	7.		SOLE DISPOSITIVE POWER:
				0

		8.		SHARED DISPOSITIVE POWER:
				2,317,973

9.		AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
PERSON:
		2,317,973

10.		CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES:

11.		PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11):
		7.6%

12.		TYPE OF REPORTING PERSON:
		IA


 CUSIP No.	925815102

1.               	NAME OF REPORTING PERSONS
                             I.R.S. Identification Nos. of above
persons (entities only).
		Jon C. Baker

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				0
Beneficially
Owned by	6.		SHARED VOTING POWER:
Each				2,654,548
Reporting
Person With	7.		SOLE DISPOSITIVE POWER:
				0

		8.		SHARED DISPOSITIVE POWER:
				2,654,548

9.		AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
PERSON:
		2,654,548

10.		CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES:

11.		PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11):
		8.7%

12.		TYPE OF REPORTING PERSON:
		IN


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				153,500
Beneficially
Owned by	6.		SHARED VOTING POWER:
Each				2,654,548
Reporting
Person With	7.		SOLE DISPOSITIVE POWER:
				153,500

		8.		SHARED DISPOSITIVE POWER:
				2,654,548

9.		AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
PERSON:
		2,808,048

10.		CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES:

11.		PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11):
		9.2%

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:
		NEVIS CAPITAL MANAGEMENT LLC ("Nevis LLC")
		Jon C. Baker ("Baker")
		David R. Wilmerding, III ("Wilmerding")
	(b)	Address of Principal Business Office or, if none, Residence:
Nevis LLC, Baker and Wilmerding - 1119 St. Paul St, Baltimore MD  21202
	(c)	Citizenship:
		Nevis LLC - MARYLAND
		Baker and Wilmerding - 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:
Nevis LLC:	2,317,973
Baker:		2,654,548
Wilmerding:  	2,808,048
(b)	Percent of Class:
Nevis LLC:	7.6%
Baker:		8.7%
Wilmerding:  	9.2%
	(c)	Number of shares as to which the person has:
(i)	sole power to vote or to direct vote:
Nevis LLC:	0
Baker:  		0
Wilmerding:  	153,500
(ii)	shared power to vote or to direct the vote:
Nevis LLC:	2,317,973
Baker:  		2,654,548
Wilmerding:  	2,654,548
(iii)	sole power to dispose or to direct the disposition of:
Nevis LLC:	0
Baker:  		0
Wilmerding:  	153,500
(iv)	shared power to dispose or to direct the disposition:
Nevis LLC:	2,317,973
Baker:  		2,654,548
Wilmerding:  	2,654,548

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
(b)	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.



02/13/2002
- ------------------------------------------------
		Date
Nevis Capital Management LLC

By:  /s/  David R. Wilmerding, III
- -------------------------------------------------
David R. Wilmerding, III, Managing Member



		02/13/2002
- ------------------------------------------------
		Date

        /s/  Jon C. Baker
- -----------------------------------------------
Jon C. Baker


02/13/2002
- ------------------------------------------------
		Date

         /s/ David R. Wilmerding, III
- -----------------------------------------------
          David R. Wilmerding, III






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