VICOR CORP
DEF 14A, 1999-04-27
ELECTRONIC COMPONENTS, NEC
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                                  SCHEDULE 14A
                                 (Rule 14a-101)

                     INFORMATION REQUIRED IN PROXY STATEMENT

                            SCHEDULE 14A INFORMATION

           PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES
                               EXCHANGE ACT OF 1934

FILED BY THE REGISTRANT [X]      FILED BY A PARTY OTHER THAN THE REGISTRANT [ ]
- -------------------------------------------------------------------------------
Check the appropriate box:
[ ] Preliminary  Proxy  Statement 
[X] Definitive  Proxy Statement 
[ ] Definitive Additional  Materials 
[ ] Soliciting  Material Pursuant to  ss.240.14a-11(c) or ss.240.14a-12 
[ ] Confidential,  for Use of the Commission Only (as permitted by Rule
    14a-6(e)(2)

                                Vicor Corporation
                (Name of Registrant as Specified In Its Charter)

- --------------------------------------------------------------------------------
    (Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)

Payment of Filing Fee (Check the appropriate box):
[X] No fee required.
[ ] Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.

(1) Title of each class of securities to which transaction applies:

(2) Aggregate number of securities to which transaction applies:

(3) Per unit price or other underlying value of transaction computed pursuant to
    Exchange  Act Rule 0-11 (Set  forth the  amount on which the  filing  fee is
    calculated and state how it was determined):

(4) Proposed maximum aggregate value of transaction:

(5) Total fee paid:

[ ] Fee paid previously with preliminary materials.

[ ] Check box if any part of the fee is offset as  provided  by  Exchange  Act
    Rule  0-11(a)(2)  and identify the filing for which the  offsetting  fee was
    paid  previously.  Identify the previous  filing by  registration  statement
    number, or the Form or Schedule and the date of its filing.

(1) Amount Previously Paid:

(2) Form, Schedule or Registration Statement No.:

(3) Filing Party:

(4) Date Filed:


<PAGE>




                             [VICOR CORPORATE LOGO]

                                 April 27, 1999

Dear Stockholder:

     You are cordially invited to attend the 1999 Annual Meeting of Stockholders
(the "Annual Meeting"). The Annual Meeting will be held:

                DATE:    June 24, 1999
                TIME:    5:00 P.M. Local Time
                PLACE:   Andover Country Club
                         60 Canterbury Street
                         Andover, Massachusetts

     The attached  Notice of Annual Meeting and Proxy Statement cover the formal
business of the Annual Meeting.  The  accompanying  Proxy  Statement  contains a
discussion of the matters to be voted upon at the Annual Meeting.  At the Annual
Meeting your  management will report on the operations of the  Corporation,  and
directors  and  officers  of the  Corporation  will  respond to  questions  that
stockholders may have.

     The Board of Directors encourages you to promptly complete, date, sign, and
return your Proxy Card.  Return of the Proxy Card indicates your interest in the
Corporation's  affairs.  If you attend the Annual  Meeting and wish to vote your
shares in person you may revoke your proxy at that time.


                                            Sincerely Yours,


                                            /s/ PATRIZIO VINCIARELLI
                                            ------------------------            
                                            President and Chairman of the Board

<PAGE>



                                VICOR CORPORATION
                           --------------------------

                    NOTICE OF ANNUAL MEETING OF STOCKHOLDERS
                      TO BE HELD ON THURSDAY, JUNE 24, 1999

                           --------------------------

     NOTICE IS HEREBY GIVEN that the 1999 Annual  Meeting of  Stockholders  (the
"Annual  Meeting")  of Vicor  Corporation  (the  "Corporation")  will be held on
Thursday,  June 24, 1999 at 5:00 p.m.,  local time, at the Andover Country Club,
60 Canterbury Street, Andover, Massachusetts, for the following purposes:

     1. To fix the number of Directors at six and to elect six Directors to hold
office until the 2000 Annual Meeting of Stockholders  and until their respective
successors are duly elected and qualified; and

     2. To consider and act upon any other matters which may be properly brought
before the Annual Meeting, or any adjournments or postponements thereof.

     Any action may be taken on the foregoing proposals at the Annual Meeting on
the date specified above, or on any date or dates to which, by original or later
adjournment, the Annual Meeting may be adjourned, or to which the Annual Meeting
may be postponed.

     The Board of Directors has fixed the close of business on April 30, 1999 as
the record date for  determining the  stockholders  entitled to notice of and to
vote at the Annual Meeting and any adjournments or postponements  thereof.  Only
stockholders of record at the close of business on that date will be entitled to
notice  of  and  to  vote  at  the  Annual  Meeting  and  any   adjournments  or
postponements thereof.

     You are  requested  to fill in and sign the  enclosed  Proxy  Card which is
being  solicited  by the  Board  of  Directors  and to mail it  promptly  in the
enclosed  envelope.  Any proxy may be  revoked  by a  writing  delivered  to the
Corporation  stating  that the proxy is revoked or by  delivery of a later dated
proxy.  Stockholders  of record who attend the Annual Meeting may vote in person
by notifying  the  Secretary,  even if they have  previously  delivered a signed
proxy.



                                             By Order of the Board of Directors


                                             MARK A. GLAZER
                                             Secretary
Andover, Massachusetts
April 27, 1999

     WHETHER OR NOT YOU PLAN TO ATTEND THE MEETING, PLEASE COMPLETE,  SIGN, DATE
AND PROMPTLY RETURN THE ENCLOSED PROXY IN THE ENVELOPE  PROVIDED.  IF YOU ATTEND
THE ANNUAL MEETING,  YOU MAY VOTE YOUR SHARES IN PERSON IF YOU WISH, EVEN IF YOU
HAVE PREVIOUSLY RETURNED YOUR PROXY CARD.

<PAGE>



                                VICOR CORPORATION

                                25 FRONTAGE ROAD
                          ANDOVER, MASSACHUSETTS 01810
                            TELEPHONE (978)470-2900


                                 PROXY STATEMENT
                   FOR THE 1999 ANNUAL MEETING OF STOCKHOLDERS
                      TO BE HELD ON THURSDAY, JUNE 24, 1999

                                                                  April 27, 1999

     This Proxy  Statement is furnished in connection  with the  solicitation of
proxies by the Board of Directors of Vicor Corporation (the  "Corporation") from
holders of the outstanding shares of capital stock of the Corporation for use at
the  1999  Annual  Meeting  of  Stockholders  of the  Corporation  to be held on
Thursday, June 24, 1999 at 5:00 p.m., at the Andover Country Club, 60 Canterbury
Street, Andover, Massachusetts, and at any adjournments or postponements thereof
(the "Annual  Meeting").  At the Annual Meeting,  stockholders will consider the
matters set forth in the accompanying Notice of Annual Meeting.

     This Proxy  Statement  and the  accompanying  Notice of Annual  Meeting and
proxy card are first being sent to  stockholders  on or about May 14, 1999.  The
Board of  Directors  has fixed the close of  business  on April 30,  1999 as the
record date for the  determination of stockholders  entitled to notice of and to
vote at the Annual Meeting (the "Record Date").  Only  stockholders of record at
the close of  business  on the Record  Date will be entitled to notice of and to
vote at the Annual  Meeting.  As of March 31, 1999,  there were  outstanding and
entitled to vote  29,282,073  shares of Common  Stock and  12,042,409  shares of
Class B Common Stock of the Corporation. Each share of Common Stock entitles the
holder  thereof  to one vote per  share and each  share of Class B Common  Stock
entitles the holder  thereof to ten votes per share.  Shares of Common Stock and
Class B Common Stock will vote  together as a single class on the  proposals set
forth in this Proxy Statement.

     Stockholders of the  Corporation are requested to complete,  date, sign and
return the accompanying Proxy Card in the enclosed envelope.  Shares represented
by a properly  executed  proxy  received prior to the vote at the Annual Meeting
and not revoked will be voted at the Annual Meeting as directed in the proxy. If
a properly  executed proxy is submitted and no instructions are given, the proxy
will be voted FOR the fixing of the Board of  Directors  at six and the election
of the six  nominees  for  Directors  of the  Corporation  named  in this  Proxy
Statement.  It is not anticipated that any matters other than those set forth in
this Proxy Statement will be presented at the Annual  Meeting.  If other matters
are  presented,  proxies will be voted in accordance  with the discretion of the
proxy holders.


<PAGE>


     A  stockholder  of record may revoke a proxy at any time before it has been
exercised  by  (i)  filing  a  written  revocation  with  the  Secretary  of the
Corporation  at the address of the  Corporation  set forth above;  (ii) filing a
duly  executed  proxy  bearing  a later  date;  or (iii)  appearing  in  person,
notifying  the  Secretary  and  voting  by  ballot at the  Annual  Meeting.  Any
stockholder  of record as of the Record Date  attending  the Annual  Meeting may
vote in  person  whether  or not a proxy  has  been  previously  given,  but the
presence  (without  further  action) of a stockholder at the Annual Meeting will
not constitute revocation of a previously given proxy.

     Shares with respect to which votes have been withheld from any Director are
counted for purposes of determining  the presence or absence of a quorum for the
transaction  of  business,  but such  withheld  votes have no legal effect under
Delaware  law.  Shares that reflect  abstentions  or "broker  non-votes"  (i.e.,
shares  held by brokers  that are  represented  at the Annual  Meeting but as to
which such brokers have not received  instructions  from the  beneficial  owners
and,  with  respect to one or more but not all issues,  such brokers do not have
discretionary  voting power to vote such shares) will be counted for purposes of
determining  whether a quorum is present for the  transaction of business at the
Annual Meeting.  For purposes of determining  whether a particular  proposal has
passed,  abstentions  will be treated as votes cast  against  the  proposal  and
broker non-votes will have no effect on the outcome of the vote.

     The cost of solicitation  of proxies in the form enclosed  herewith will be
borne by the  Corporation.  In addition to the  solicitation of proxies by mail,
the  Directors,  officers  and  employees  of the  Corporation  may also solicit
proxies  personally  or by  telephone  without  special  compensation  for  such
activities.  The Corporation will also request  persons,  firms and corporations
holding  shares  in their  names or in the  names of their  nominees,  which are
beneficially owned by others, to send proxy materials to and obtain proxies from
such beneficial  owners.  The Corporation  will reimburse such holders for their
reasonable expenses in connection therewith.

     The Corporation's 1998 Annual Report,  including  financial  statements for
the  fiscal  year ended  December  31,  1998,  is being  mailed to  stockholders
concurrently with this Proxy Statement.


                                   PROPOSAL I

                              ELECTION OF DIRECTORS

     The Board of Directors of the Corporation has nominated the six individuals
named below for election as Directors. Each of the nominees is presently serving
as a Director of the Corporation.  If elected, the nominees will serve until the
2000 Annual Meeting of Stockholders and until their respective  successors shall
have been duly  elected and  qualified.  Proxies  will be voted for the nominees
named below  unless  otherwise  specified  in the proxy.  The Board of Directors
anticipates  that each of the  nominees,  if elected,  will serve as a Director.
However,  if any person  nominated by the Board of Directors  fails to stand for
election or is unable to accept election, proxies solicited hereby will be voted
either for the election of another  person  designated by the Board of Directors
or to fix the number of Directors at a lesser number and elect the nominees able
and willing to serve. Directors will be elected by a plurality of the votes cast
by the holders of Common  Stock and Class B Common  Stock voting on the election
of Directors.  Holders of voting rights sufficient to elect each of the nominees
named below have indicated an intention to vote in favor of such nominees.

     The  Board of  Directors  unanimously  recommends  a vote  "FOR" all of the
nominees.





                                       2
                                    
 <PAGE>


INFORMATION REGARDING NOMINEES

     The  following  table sets forth certain  information  as of March 31, 1999
with  respect  to the six  nominees  for  election  to the  Board of  Directors.
Information regarding the beneficial ownership of shares of the capital stock of
the  Corporation  by such  persons is set forth  under the section of this Proxy
Statement entitled "Principal and Management Stockholders." 

<TABLE> 
<CAPTION>

       NAME                 AGE  DIRECTOR SINCE   PRINCIPAL OCCUPATION FOR PAST FIVE YEARS
       ----                 ---  --------------   ----------------------------------------
<S>                         <C>       <C>             <C>    
Patrizio Vinciarelli.....   52       1981         Chairman of the Board, President and Chief Executive 
                                                  Officer of the Corporation.
Estia J. Eichten.........   52       1981         Senior Scientist with the Fermi National Accelerator
                                                  Laboratory in Batavia, Illinois; President of VLT Corporation,
                                                  a wholly-owned subsidiary of the Corporation, since 1987. 
Jay M. Prager............   52       1993         Senior Vice President, Technology of the Corporation.
Barry Kelleher...........   50       1999         Senior Vice President, Global Operations of the Corporation. 
                                                  Mr. Kelleher was appointed Director on March 12, 1999. 
David T. Riddiford.......   63       1984         General Partner of P.R. Venture Partners, L.P., a venture
                                                  capital affiliate of Pell, Rudman & Co., Inc., an investment
                                                  advisory firm, since 1987; general partner of the general
                                                  partner of Venture Founders Capital, a venture capital
                                                  partnership, since 1984. Mr. Riddiford is currently a
                                                  Director of Datawatch Corporation. 
M. Michael Ansour........   45       1993         Managing partner of Langdon Street Capital, L.P., an
                                                  investment limited partnership in New York City, since 1992;
                                                  Vice President of Kellner DiLeo & Co., an investment firm
                                                  in New York City, from 1989 to 1991. 
</TABLE>


     The Corporation's  Board of Directors held three meetings during the fiscal
year ended  December 31, 1998.  Each of the Directors  attended more than 75% of
the total  number of  meetings  of the Board of  Directors  and  meetings of the
committees of the Board of Directors on which he served.  The Board of Directors
has established an Audit Committee and an Executive Compensation Committee.  The
Audit  Committee held four meetings in 1998. The Audit  Committee is composed of
Messrs.  Ansour,  Eichten and  Riddiford.  The functions of the Audit  Committee
generally  include   recommending  the  appointment  of  independent   auditors,
reviewing  with the  independent  auditors  the scope and  results  of the audit
engagement,  and monitoring the Corporation's  internal financial and accounting
controls.  The Executive  Compensation Committee met once in 1998. The Executive
Compensation Committee is composed of Messrs.  Eichten,  Riddiford,  and Ansour.
The Executive  Compensation  Committee is responsible for establishing salaries,
bonuses  and  other  compensation  for  the  officers  of  the  Corporation  and
administering  the  Corporation's  stock  option  and bonus  plans  pursuant  to
authority delegated to it by the Board of Directors. The Board of Directors does
not have a standing nominating  committee.  The full Board of Directors performs
the function of such a committee.

DIRECTORS' COMPENSATION

     Directors of the Corporation do not currently receive cash compensation for
their service on the Board of Directors. In 1998, each employee Director,  other
than any Director who held in excess of 10% of the total number of shares of the
capital stock of the Corporation (i.e., Mr. Vinciarelli),  and each non-employee
Director  automatically  received non-qualified stock options upon election as a
Director under the Corporation's 1993 Stock Option Plan (the "1993 Plan").  Such
employee   Directors   and   non-employee   Directors    automatically   receive
non-qualified  stock options to purchase up to 2,000 shares of the Corporation's
Common Stock, which become exercisable in five equal annual  installments of 400
shares on each  anniversary  of the date of grant and  expire 10 years  from the
date of grant.  Non-employee  Directors  also receive  additional  non-qualified
stock options to purchase up to 2,000 shares of the  Corporation's  Common Stock
that become  exercisable  in their  entirety one year from the date of grant and
expire 15 months from the date of grant.  All such options are  exercisable at a
price equal to the fair market  value of the Common  Stock at the date of grant.
At the 1998  Annual  Meeting of  Stockholders,  the  Stockholders  approved  the
Corporation's  1998 Stock Option and Incentive  Plan (the "1998  Plan").  To the
extent  practicable,  the  Corporation  will continue to grant options under the
1993 Plan to non-employee  Directors and employees of the Corporation  until all
of such options have been granted and,  thereafter,  the Corporation  will grant
options under the 1998 Plan.


                                        3


<PAGE>


    EXECUTIVE OFFICERS

     Executive  officers are elected annually and serve at the discretion of the
Board of  Directors.  The following  persons are the  executive  officers of the
Corporation.

     Patrizio  Vinciarelli,  52,  Chairman  of the  Board,  President  and Chief
Executive  Officer.  Dr.  Vinciarelli  founded  Vicor in 1981 and has  served as
President since that time.

     Jay M. Prager, 52, Senior Vice President, Technology since 1991. Mr. Prager
held the  position of Vice  President,  Systems  Engineering  from 1987 to 1991.
Prior to joining the  Corporation in 1987, Mr. Prager was Director,  New Product
Development,  at  the  Modicon  Division  of  Gould,  Inc.,  a  manufacturer  of
industrial  control  equipment,  where he spent a total of nine years in various
engineering and engineering management roles.

     Barry Kelleher,  50, Senior Vice President,  Global  Operations since March
1999.  Mr.  Kelleher held the position of Senior Vice  President,  International
Operations  from 1993 to 1999.  Prior to joining the  Corporation  in 1993,  Mr.
Kelleher  was  employed at  Computer  Products  Inc.,  a  manufacturer  of power
conversion  products,  since 1981,  where he held the position of Corporate Vice
President and President of the Power Conversion Group.

     David W.Nesbitt, 53, Senior Vice President,  North and South American Sales
since 1995. Mr. Nesbitt held the position of Vice President,  Sales from 1989 to
1992 and Vice  President,  North  American  Sales  from  1992 to 1995.  Prior to
joining the Corporation in 1989, Mr. Nesbitt was employed at Siliconix,  Inc., a
manufacturer of integrated circuits,  from 1981 to 1989. He held the position of
Central  Area  Manager  from  1981 to 1986,  at which  time he was  promoted  to
Director, North American Sales.

     Mark A. Glazer, 46, Chief Financial Officer, Treasurer, and Secretary since
1997.  From April 1998 to March  1999,  Mr.  Glazer was Acting  Vice  President,
Operations. Mr. Glazer held the position of Vice President, Finance from 1993 to
1997 and Controller of the Corporation  from 1988 to 1993.  Prior to joining the
Corporation  in 1988,  Mr.  Glazer was  employed by Analog and Digital  Systems,
Inc., a manufacturer of home and automotive stereo equipment, from 1983 to 1988,
where he held the position of  Controller  from 1983 to 1986 and the position of
Treasurer  from 1986 to 1987,  at which time he was promoted to Vice  President,
Finance.

     N. Douglas Powers,  52, Vice  President,  Chief  Information  Officer since
1993. Mr. Powers held the position of Director,  Management  Information Systems
of the Corporation from 1989 to 1991 and Senior Director, Management Information
Systems from 1991 to 1993.  Prior to joining the Corporation in 1989, Mr. Powers
was  Director,  Research  and  Technical  Support at Stratus  Computer,  Inc., a
manufacturer of fault tolerant computer systems, from 1981 to 1989.

     Larry C.  Gretzinger,  51, Vice  President,  Quality  since 1997.  Prior to
joining the Corporation in 1997, Mr.  Gretzinger was employed at  Racal-Datacom,
Inc.,  a  designer,  manufacturer  and service  provider of data  communications
equipment, where he held the position of Vice President,  Corporate Quality from
1994 to 1997.  Previous positions during his eight year tenure at Racal-Datacom,
Inc. included Director,  Quality;  Manager, Quality Systems; and Manager, Master
Scheduling.

     Thomas A. St. Germain,  61, Vice President,  Financial Services since 1998.
Prior to joining the  Corporation in 1998, Mr. St. Germain was employed at Summa
Four, Inc., a manufacturer of specialized digital switches, since 1993, where he
held the  position  of  Senior  Vice  President,  Chief  Financial  Officer  and
Treasurer.

     H. Allen  Henderson,  51, Vice  President,  Vicor  Corporation;  President,
Westcor  Division since March 1999.  Mr.  Henderson held the position of General
Manager of the Westcor division from 1987 to 1999 and Sales Manager from 1985 to
1987.  Prior to joining the  Corporation in 1985, Mr.  Henderson was employed at
Boschert,  Inc., a manufacturer of power supplies, since 1984, where he held the
position of Director of Marketing.


                                        4


<PAGE>


                      PRINCIPAL AND MANAGEMENT STOCKHOLDERS

     The   following   table  sets  forth  the   beneficial   ownership  of  the
Corporation's  Common  Stock and Class B Common Stock held by (i) each person or
entity that is known to the Corporation to be the beneficial  owner of more than
five  percent of the  outstanding  shares of either  class of the  Corporation's
common stock, (ii) each Director of the Corporation, (iii) each of the executive
officers of the Corporation  named in the Summary  Compensation  Table, and (iv)
all Directors and executive officers as a group, based on representations of the
Directors  and  executive  officers of the  Corporation  as of March 31, 1999, a
review of filings on Schedules  13D, 13F and 13G under the  Securities  Exchange
Act of 1934,  as amended (the  "Exchange  Act"),  and  holdings  reported by the
National Association of Securities Dealers Automated Quotation System ("NASDAQ")
with  respect to December 31, 1998.  Except as  otherwise  specified,  the named
beneficial  owner has sole  voting and  investment  power over the  shares.  The
information  in the table  reflects  shares  outstanding of each class of common
stock on March 31, 1999, and does not, except as otherwise indicated below, take
into account  conversions after such date of shares of Class B Common Stock into
Common Stock.  Subsequent  conversions of Class B Common Stock into Common Stock
will increase the voting  control of persons who retain shares of Class B Common
Stock.  The percentages have been determined in accordance with Rule 13d-3 under
the Exchange Act. As of March 31, 1999, a total of  41,324,482  shares of common
stock were outstanding, of which 29,282,073 were shares of Common Stock entitled
to one vote  per  share  and  12,042,409  were  shares  of Class B Common  Stock
entitled  to ten  votes  per  share.  Each  share  of  Class B  Common  Stock is
convertible into one share of Common Stock. 

<TABLE> 
<CAPTION>

                                                                         Percent of   Percent of Class B
                                                        Total           Common Stock    Common Stock        Percent
                           Name of                      Number          Beneficially    Beneficially      of Voting
                     Beneficial Owner (1)             of Shares (2)(3)      Owned           Owned            Power
                     --------------------             ----------------   -----------    ------------      ----------
<S>                                                   <C>                   <C>             <C>            <C>    
Patrizio Vinciarelli ...............................    20,986,650           34.0%           91.5%           80.3%
Estia J. Eichten ...................................     1,247,964(4)         1.9%            5.7%            5.0%
M. Michael Ansour ..................................        29,000            *               *               *
David T. Riddiford .................................       208,736(5)         *               *               *
Richard E. Beede ...................................       114,102(6)         *               *               *
Jay M. Prager ......................................       144,868            *               *               *
David W. Nesbitt ...................................        85,653            *               *               *
Barry Kelleher .....................................        56,982            *               *               *
All Directors and executive officers as a group
     (12 persons) ..................................    22,848,227           37.7%           98.0%           85.6%
Nevis Capital Management, Inc ......................     3,148,444           10.8%            *               2.1%
   119 St. Paul Street, Baltimore, MD 21202

</TABLE>
- -----------------
   * Less than 1%

(1) The address of Mr.  Eichten is: c/o Fermi National  Accelerator  Laboratory,
    Kirk Road and Pine  Street,  Batavia,  IL 60510.  The  address of each other
    person  named  in the  table,  but not  specified  therein,  is:  c/o  Vicor
    Corporation, 25 Frontage Road, Andover, MA 01810.

(2) Includes  shares  issuable  upon  the  exercise  of stock  options  that are
    exercisable  or will  become  exercisable  on or before May 30,  1999 in the
    following  amounts:  Mr.  Vinciarelli,  6,014  shares of Common  Stock;  Mr.
    Eichten,  6,000 shares of Common Stock;  Mr. Ansour,  6,000 shares of Common
    Stock;  Mr.  Riddiford,  6,000 shares of Common Stock;  Mr.  Prager,  90,072
    shares  of Common  Stock and  54,500  shares  of Class B Common  Stock;  Mr.
    Nesbitt,  85,653  shares of Common  Stock;  Mr.  Kelleher,  56,982 shares of
    Common  Stock;  and  all  Directors  and  executive  officers  as  a  group,
    11,046,379  shares of Common Stock and  11,801,848  shares of Class B Common
    Stock.

(3) The  calculation  of the number of shares  includes the  following:  for Mr.
    Vinciarelli,  9,963,002  shares of Common Stock  representing  34.0% of such
    class and 11,023,648  shares of Class B Common Stock  representing  91.5% of
    such class; and for Mr. Eichten, 557,264 shares of Common Stock representing
    1.9% of such class and 690,700  shares of Class B Common Stock  representing
    5.7% of such class.



                                        5



<PAGE>


(4) Includes 8,500 shares of Common Stock  beneficially  owned by Mr.  Eichten's
    spouse as to which Mr. Eichten disclaims beneficial ownership.

(5) Includes  101,236 shares of Common Stock held by Venture  Founders  Partners
    Limited  Partnership.  Mr.  Riddiford,  a Director of the Corporation,  is a
    general partner of the general partner of Venture Founders  Partners Limited
    Partnership.  Also includes 4,500 shares of Common Stock  beneficially owned
    by Mr.  Riddiford's  spouse as to which Mr. Riddiford  disclaims  beneficial
    ownership.

(6) Includes 600 shares of Common Stock beneficially owned by Mr. Beede's spouse
    and 1,200 shares of Common Stock  beneficially  owned by two relatives as to
    which Mr. Beede disclaims beneficial ownership.


                             EXECUTIVE COMPENSATION

SUMMARY COMPENSATION TABLE

     The  following  table shows for the fiscal  years ended  December 31, 1996,
1997 and 1998 the  compensation  paid by the  Corporation to the Chief Executive
Officer and the other four most highly compensated executive officers who earned
more than $100,000 during 1998. 

<TABLE> 
<CAPTION>

                                                      ANNUAL COMPENSATION                     LONG TERM        
                                             ---------------------------------------      COMPENSATION AWARDS
                                                                         OTHER ANNUAL     -------------------
NAME AND                                                                 COMPENSATION      SHARES UNDERLYING
PRINCIPAL POSITION                    YEAR   SALARY($)    BONUS ($)         ($)(1)             OPTIONS (#)
- ------------------                    ----   ---------    ---------      ------------       -----------------
<S>                                   <C>     <C>         <C>             <C>               <C>    
P. Vinciarelli....................... 1998    198,846       --              9,515              7,389
President & Chief                     1997    190,615       --              8,820             10,574
Executive Officer                     1996    170,615       --              6,680              5,369

R. Beede (2)......................... 1998    199,278     23,232            9,685              5,612
Former Sr. Vice President             1997    163,857     21,884            9,124              7,601
Marketing                             1996    151,846     14,207            7,965              6,126

J. Prager............................ 1998    173,154       --              5,290              7,038
Sr. Vice President                    1997    168,115       --              9,119              9,620
Tehnology                             1996    151,846       --             10,558              8,236

B. Kelleher.......................... 1998    154,230     14,540           14,172              6,805
Sr. Vice President                    1997    145,914     13,667            9,465              2,626
Global Operations                     1996    137,077     13,500            9,989              3,516

D. Nesbitt........................... 1998    154,230     21,744            9,039              2,683
Sr. Vice President                    1997    147,712     17,967            9,040              3,866
North & South American Sales          1996    137,077     16,301            9,752              3,516
</TABLE>
- ----------

(1) This  column  sets  forth  the cost of  providing  certain  perquisites  and
    benefits to the named executive officers. The amounts shown relate primarily
    to automobile allowances, which were as follows: for Mr. Vinciarelli, $9,242
    in 1998,  $8,610 in 1997,  and $6,005 in 1996;  Mr.  Beede,  $7,746 in 1998,
    $6,650 in 1997, and $6,813 in 1996; Mr.  Prager,  $5,017 in 1998,  $8,909 in
    1997, and $9,206 in 1996; Mr. Kelleher,  $8,007 in 1998, $7,760 in 1997, and
    $7,889 in 1996; and Mr. Nesbitt,  $8,044 in 1998, $7,916 in 1997, and $8,165
    in 1996.

(2) Mr. Beede resigned from the Corporation effective December 31, 1998.


                                        6


<PAGE>

OPTION/SAR GRANTS IN LAST FISCAL YEAR

     The  following  table sets forth  each  grant of stock  options  during the
fiscal  year ended  December  31, 1998 to the Chief  Executive  Officer and each
other  executive  officer  named in the Summary  Compensation  Table.  All stock
options granted in 1998 relate to shares of the  Corporation's  Common Stock. No
stock  appreciation  rights ("SARs") have been granted by the  Corporation.  The
table also shows the value of the options granted at the end of the option terms
if the price of the Corporation's Common Stock were to appreciate annually by 5%
and 10%, respectively.  There is no assurance that the price of the Common Stock
will appreciate at the rates shown in the table. If the price of the Common
Stock  appreciates,  the value of the Common Stock held by all stockholders will
increase.

<TABLE>
<CAPTION>
                                       INDIVIDUAL GRANTS                             
                       --------------------------------------------------------                           
                                                                                  POTENTIAL REALIZABLE VALUE AT
                        SHARES                                                       ASSUMED ANNUAL RATES OF  
                      UNDERLYING                                                   STOCK PRICE APPRECIATION FOR
                       OPTIONS   %OF TOTAL OPTIONS    EXERCISE OR                        OPTION TERM   
                       GRANTED  GRANTED TO EMPLOYEES  BASE PRICE     EXPIRATION  -----------------------------             
         NAME           (#)       IN FISCAL YEAR        ($/Sh)           DATE         5%($)         10%($)
        -----          ------    ------------------- ----------       ----------     ------        ------
<S>                   <C>              <C>             <C>            <C>            <C>           <C>

P. Vinciarelli....... 1,416(1)         0.17%           $28.25         3/02/2000    $  4,100      $  8,400
                      3,540(2)         0.42             28.25         3/02/2008      62,893       159,382
                        427(3)         0.05             23.13         1/27/2008       6,211        15,741
                        241(4)         0.03             31.13         1/02/2008       3,686        10,313
                         32(4)         0.00             31.13         1/02/2008         489         1,369
                        120(5)         0.01             28.00         1/07/2008       2,113         5,355
                        192(6)         0.02             26.00         1/09/2008       3,139         7,956
                        186(6)         0.02             26.88         1/09/2008       2,878         7,544
                        130(9)         0.02             25.75        12/23/2008      (1,641)         (630) 
                        572(9)         0.07              8.75        12/23/2008       2,505         6,953 
                        533(3)         0.06             23.13         1/27/2008       7,753        19,648 

 R. Beede............   779(2)         0.09             28.25         3/02/2008      13,840        35,073
                      2,833(2)         0.34             28.25         3/02/2008      50,332       127,551
                      2,000(7)         0.24             13.88         6/25/2008      17,458        44,242

J. Prager............ 1,232(1)         0.15             28.25         3/02/2000       3,567         7,309
                        779(2)         0.09             28.25         3/02/2008      13,840        35,073
                      2,464(2)         0.29             28.25         3/02/2008      43,776       110,937
                         47(3)         0.01             23.13         1/27/2008         684         1,733
                        457(3)         0.05             23.13         1/27/2008       6,648        16,847
                         59(3)         0.01             23.13         1/27/2008         858         2,175
                      2,000(7)         0.24             13.88         6/25/2008      17,458        44,242

B. Kelleher..........   708(2)         0.08             28.25         3/02/2008      12,579        31,876
                      1,097(2)         0.13             28.25         3/02/2008      19,490        49,390
                      5,000(8)         0.59             20.00         5/07/2008      54,745       146,406

D. Nesbitt...........   708(2)         0.08             28.25         3/02/2008      12,579        31,876
                      1,975(2)         0.24             28.25         3/02/2008      35,088        88,921

</TABLE>
- -----------

(1) These  options  were  granted  on March 2, 1998 and  became  exercisable  on
    October 26, 1998.

(2) These options were granted on March 2, 1998 and become  exercisable  in five
    equal annual installments on each anniversary of the date of grant.

(3) These  options  were granted on January 27, 1998 and become  exercisable  in
    five equal annual installments on each anniversary of the date of grant.

(4) These options were granted on January 2, 1998 and become exercisable in five
    equal annual installments on each anniversary of the date of grant.

(5) These options were granted on January 7, 1998 and become exercisable in five
    equal annual installments on each anniversary of the date of grant.


                                       7

<PAGE>



(6) These  options were granted on June 9, 1998 and become  exercisable  in five
    equal annual installments on each anniversary of the date of grant.

(7) These options were granted on June 25, 1998 and become  exercisable  in five
    equal annual installments on each anniversary of the date of grant.

(8) These  options  were granted on May 7, 1998 and become  exercisable  in five
    equal annual installments on each anniversary of the date of grant.

(9) These  options were granted on December 23, 1998 and become  exercisable  in
    five equal annual installments on each anniversary of the date of grant.



AGGREGATED OPTION EXERCISES IN LAST FISCAL YEAR AND FISCAL YEAR-END VALUES

     The following  table sets forth the shares  acquired and the value realized
upon exercise of stock options during the fiscal year ended December 31, 1998 by
the Chief  Executive  Officer  and each  other  executive  officer  named in the
Summary  Compensation  Table and certain  information  concerning the number and
value of unexercised options. 

<TABLE> 
<CAPTION>


                                                                         NUMBER OF SHARES            VALUE OF UNEXERCISED
                                                                      UNDERLYING UNEXERCISED             IN-THE-MONEY       
                                  SHARES ACQUIRED    VALUE          OPTIONS AT FISCAL YEAR-END(#)  OPTIONS AT FISCAL YEAR-END($)(1)
NAME                               ON EXERCISE(#)   REALIZED($)     EXERCISABLE    UNEXERCISABLE   EXERCISABLE    UNEXERCISABLE
- ----                              --------------   -----------     ------------    -------------   -----------    -------------
<S>                                <C>              <C>              <C>             <C>               <C>            <C>  
P. Vinciarelli..................            0        $ 0.00                   0         572         $        0     $      143
R. Beede........................            0          0.00               9,312           0             10,697              0
J. Prager.......................            0          0.00             125,530           0            925,340              0
B. Kelleher.....................            0          0.00                   0           0                  0              0
D. Nesbitt......................            0          0.00              70,290           0            361,799              0

</TABLE>

- ----------

(1) Equal to the  market  value of shares  covered  by  in-the-money  options on
    December 31, 1998, less the aggregate  option  exercise  price.  Options are
    in-the-money  if the market value of the shares  covered  thereby is greater
    than the option exercise price.  All values assume  conversion of any shares
    of Class B Common Stock to Common Stock.

REPORT OF THE COMPENSATION COMMITTEE OF THE BOARD OF DIRECTORS ON EXECUTIVE
COMPENSATION

     The  Executive  Compensation  Committee  of the Board of  Directors  of the
Corporation (the "Committee") consists of David T. Riddiford,  Estia J. Eichten,
and M. Michael Ansour,  all of whom are non-employee  directors.  Mr. Ansour was
elected to the Committee in June 1998.  The Committee  establishes  the terms of
and grants  awards under the  Corporation's  1993 Plan,  the 1998 Plan and other
benefit plans. The Committee also approves  compensation  policies for executive
officers.

Compensation Policies for Executive Officers

     The Corporation's  compensation  program for executive  officers  currently
consists primarily of a base salary and awards of stock options.  In addition to
base salary,  the Corporation  provides certain benefits to executive  officers,
such as the use of automobiles  or automobile  allowances,  and enhanced  health
insurance coverage, that are not available to employees generally.

     Salary  levels for  executive  officers  are  proposed  by  management  and
approved by the Committee.  In connection  with salary  adjustments  made in the
beginning  of 1998,  the  Committee  reviewed  compensation  information  from a
national survey of the high tech industry.  This survey contained data from over
four  hundred  companies,   including  the  Corporation.   The  survey  included
information  from certain of the  companies  contained in the peer group used in
formulating  the  Stock  Performance  Graph  appearing  on page 10,  but was not
limited to those companies.  The Committee  believes that most salary levels for
executive officers of the Corporation are comparable to the median salary levels
of the companies surveyed.


                                        8


<PAGE>


     The primary element of the Corporation's incentive compensation program has
been the  granting of options to  purchase  shares of the  Corporation's  Common
Stock under the Corporation's 1993 Plan.  Substantially all of the Corporation's
employees,  including its executive  officers,  participate in the Corporation's
1993 Plan and are expected to  participate  in the 1998 Plan.  The 1993 Plan and
the 1998 Plan are  designed to give each  participating  employee  an  ownership
interest in the  Corporation  and to align the interests of the  employees  with
those of the Corporation's stockholders.

     Stock options are granted to employees and  executive  officers  based upon
guidelines  established by the Board of Directors and the Committee.  The number
of  continuation  option  awards  ("Continuation  Awards")  granted to executive
officers  in 1998 was based on a formula,  which  calculates  the product of two
times the  executive  officer's  merit salary  increase  (based on the executive
officer's  performance  review)  divided  by the  market  value per share of the
Corporation's  Common  Stock on the date of  grant.  The  number of shares to be
granted was  approved by the  Committee,  and was not based on any  corporate or
business unit performance  measures.  All  Continuation  Awards were made with a
5-year vesting schedule.

     In addition to Continuation Awards under the 1993 Plan, the Corporation has
in the past granted  short-term  "bonus" stock options to all eligible employees
and officers (except those who participate in the Corporation's  sales incentive
plan),  that are  exercisable  for  approximately  two years.  These grants were
designed to provide a short-term  incentive  under the 1993 Plan.  In 1998,  the
Corporation  granted  "bonus" options at a rate of twenty percent of base salary
divided by the market value per share of the  Corporation's  Common Stock on the
date of grant to all  participating  executive  officers  and  employees  of the
Corporation.  Management recommends the grant of these options and the Committee
does not use  specific  or weighted  criteria  relating  to  performance  of the
Corporation in determining  whether to grant these awards.  Although  options of
this type have  typically  been  granted  over the past few years at the rate of
twenty  percent of base  salary  divided  by the  market  value per share of the
Corporation's Common Stock on the date of grant to all eligible employees,  this
program is discretionary and may be changed in the future.

     Also in 1998,  the  Corporation  granted  "long-term"  stock options to all
eligible employees and officers.  The long-term option awards are based upon the
employee's  length of service.  They are granted at a rate of twenty  percent of
base  salary for up to five years of  service,  divided by the market  value per
share  of the  Corporation's  Common  Stock  on the date of  grant,  and  become
exercisable  over a five year period.  The rate  increases to thirty  percent at
five years of service, then increases an additional two percent for each year of
service up to a maximum of fifty percent at fifteen years of service.

     Finally, to the extent applicable to the Corporation, the Committee intends
to review and to take any  necessary  and  appropriate  steps to ensure that the
Corporation complies with certain income tax regulations, which if not satisfied
would limit the deductibility of executive compensation above specified amounts.

Compensation of Chief Executive Officer

     The  Committee  approves  the  annual  salary  for  Mr.  Vinciarelli,   the
Corporation's  Chief  Executive  Officer.  The Committee  does not have specific
criteria, either in terms of individual or corporate performance,  in evaluating
the base salary of the Chief Executive  Officer.  In light of the relatively low
cash  compensation  paid to the Chief Executive  Officer,  the Committee has not
attempted  to  relate  compensation  of  the  Chief  Executive  Officer  to  the
performance of the  Corporation.  Based on salary data from the survey discussed
above,  and other  sources,  the  Committee  believes  that the Chief  Executive
Officer's  salary  is at the  lower  end of the  range of  salaries  for CEOs of
comparable companies.

     In 1998,  the  Committee  determined  to  include  Mr.  Vinciarelli  in the
granting of stock options  described above as "bonus" and  "long-term"  options.
However, as in prior years, the Corporation continued to exclude Mr. Vinciarelli
from  the  granting  of  Continuation   Awards  because  of  Mr.   Vinciarelli's
significant  stock holdings in the  Corporation  and the practice of basing such
awards on performance reviews that were typically prepared by Mr. Vinciarelli.

               Submitted by the Executive Compensation Committee:
                                M. Michael Ansour
                                Estia J. Eichten
                               David T. Riddiford


                                        9



<PAGE>


COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION

     Mr.  Eichten,  Mr.  Riddiford,  and Mr. Ansour serve on the Committee.  Mr.
Eichten  serves as President of VLT  Corporation,  the  Corporation's  licensing
subsidiary, but receives no compensation for such service. Messrs. Riddiford and
Ansour do not serve as officers of the Corporation. The Corporation is not aware
of any compensation committee interlocks.

CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

     In April 1999, the Corporation made a personal loan to Mr. Vinciarelli, the
President  and Chief  Executive  Officer  of the  Corporation  in the  amount of
$50,000.   During  1997,  the  Corporation  made  five  personal  loans  to  Mr.
Vinciarelli in the aggregate amount of $246,511. The loans are for terms of five
years,  are unsecured and bear interest at the higher of the prime rate less one
percent or the applicable  federal rate under the Internal Revenue Code of 1986,
as amended.  Including prior  borrowings,  the largest  aggregate  amount of all
indebtedness  outstanding  at  anytime  since  January  1, 1998 was  $1,809,997,
including accrued  interest.  The aggregate amount of all such loans outstanding
as of April 19, 1999 was approximately $1,809,997, including accrued interest.

     In November 1995, the Corporation made a personal loan to Mr. Nesbitt,  the
Senior Vice President of North and South  American  Sales of the  Corporation in
the amount of $66,000.  The loan is for a term of five years,  is unsecured  and
bears interest at the prime rate less one percent.  The largest aggregate amount
of this  indebtedness  outstanding at anytime since January 1, 1998 was $41,881.
The aggregate amount outstanding as of April 19, 1999 was approximately $23,800,
including accrued interest.

     During 1997, the  Corporation  made two personal  loans to Mr.  Gretzinger,
Vice President,  Quality of the Corporation in the aggregate  amount of $45,000.
One note in the  amount of $35,000  was repaid in 1998.  A note in the amount of
$10,000 is for a term of five years and is unsecured. The note bears interest at
the  prime  rate  less  one  percent.   The  largest  aggregate  amount  of  all
indebtedness  outstanding  at anytime  since  January 1, 1998 was  $45,649.  The
aggregate  amount  outstanding as of April 19, 1999 was  approximately  $11,055,
including accrued interest.

STOCKHOLDER RETURN PERFORMANCE GRAPH

     The graph set forth below presents the  cumulative,  five-year  stockholder
return for each of the  Corporation's  Common  Stock,  the Standard & Poor's 500
Index and an index of peer group  companies  selected  by the  Corporation  (the
"Peer Group").  The Peer Group consists of ten publicly-traded  companies in the
specialty  electronic  component  industry:  AMP  Incorporated;  Analog  Devices
Incorporated;  Burr-Brown Corporation; Cypress Semiconductor Corporation; Dallas
Semiconductor  Corporation;  Integrated  Device Technology  Incorporated;  Intel
Corporation;  Linear  Technology  Corporation;  LSI Logic Corporation and Xilinx
Incorporated.  The Corporation's Common Stock began trading publicly on April 3,
1990.  The graph  assumes an  investment of $100 on December 31, 1993 in each of
the  Corporation's  Common Stock,  the Standard & Poor's 500 Index, and the Peer
Group  and  assumes   reinvestment  of  all  dividends.   The  graph  is  market
capitalization-weighted.


                    COMPARISON OF FIVE YEAR CUMULATIVE RETURN
                     AMONG VICOR CORPORATION, S&P 500 INDEX
                      AND AN INDEX OF PEER GROUP COMPANIES
<TABLE>
<CAPTION>

 Measurement Period               Vicor             S&P         Peer Group
(Fiscal Year Covered)         Corporation        500 Index      Companies
- ---------------------         -----------        ---------     -----------
              <S>             <C>               <C>            <C>            
Measurement Pt-12/31/93        $   100.00       $   100.00     $   100.00
               12/31/94        $   111.96       $   101.32     $   113.81
               12/31/95        $   173.91       $   139.40     $   180.39
               12/31/96        $   145.10       $   171.40     $   342.60
               12/31/97        $   235.87       $   228.59     $   366.91
               12/31/98        $    78.26       $   293.91     $   590.54

</TABLE>








                                       10



<PAGE>



             SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

     Section  16(a) of the Exchange Act  requires  the  Corporation's  executive
officers and Directors,  and persons who own more than 10% of a registered class
of the  Corporation's  equity  securities  (collectively,  "Insiders"),  to file
reports of ownership and changes in ownership with the SEC and NASDAQ.  Insiders
are required by SEC  regulation  to furnish the  Corporation  with copies of all
Section 16(a) forms they file. To the Corporation's knowledge, based solely on a
review of copies  of such  reports  and  written  representations  that no other
reports  were  required  during the fiscal year ended  December  31,  1998,  all
transactions in the  Corporation's  securities that were engaged in by Insiders,
and therefore required to be disclosed pursuant to Section 16(a) of the Exchange
Act, were timely reported.

                              INDEPENDENT AUDITORS

     The Corporation has selected Ernst & Young LLP as the independent  auditors
for  the   Corporation   for  the  fiscal  year  ending  December  31,  1999.  A
representative  of Ernst & Young LLP is  expected  to be  present  at the Annual
Meeting  and  will  be  given  the   opportunity   to  make  a  statement.   The
representative is expected to be available to respond to appropriate questions.

                              STOCKHOLDER PROPOSALS

     Stockholder  proposals  intended to be presented at the 2000 Annual Meeting
of  Stockholders  must be received by the  Corporation on or before December 29,
1999  in  order  to be  considered  for  inclusion  in the  Corporation's  proxy
statement.  These proposals must also comply with the rules of the SEC governing
the form and content of proposals  in order to be included in the  Corporation's
proxy statement and form of proxy and should be directed to: Vicor  Corporation,
25 Frontage Road, Andover,  Massachusetts  01810,  Attention:  Secretary.  It is
suggested that any stockholder proposal be transmitted by certified mail, return
receipt requested.

     Proxies  solicited  by the Board of  Directors  will  confer  discretionary
voting authority with respect to stockholder proposals,  other than proposals to
be  considered  for inclusion in the  Corporation's  proxy  statement  described
above, that the Corporation  receives at the above address after March 30, 2000.
These proxies will also confer  discretionary  voting  authority with respect to
stockholder  proposals,  other than  proposals to be considered for inclusion in
the Corporation's proxy statement described above, that the Corporation receives
on or before March 30, 2000, subject to SEC rules governing the exercise of this
authority.





                                       11
<PAGE>


                                                                  Form of Proxy 
COMMON                              VICOR CORPORATION             COMMON

            PROXY FOR ANNUAL MEETING OF STOCKHOLDERS - JUNE 24, 1999

           THIS PROXY IS SOLICITED  ON BEHALF OF THE BOARD OF DIRECTORS AND
                    MAY BE REVOKED PRIOR TO ITS EXERCISE.

The undersigned hereby constitutes and appoints Patrizio Vinciarelli and Mark A.
Glazer,  and each of them,  as  Proxies of the  undersigned,  with full power to
appoint his substitute, and authorizes each of them to represent and to vote all
shares of Common  Stock of Vicor  Corporation  (the  "Corporation")  held by the
undersigned at the close of business on April 30, 1999, at the Annual Meeting of
Stockholders  to be held at the Andover  Country  Club,  60  Canterbury  Street,
Andover, Massachusetts, on Thursday, June 24, 1999 at 5:00 p.m., local time, and
at any adjournments or postponements thereof.

When properly  executed,  this proxy will be voted in the manner directed herein
by the undersigned stockholder(s).  IF NO DIRECTION IS GIVEN, THIS PROXY WILL BE
VOTED  FOR  THE  ELECTION  OF ALL  THE  NOMINEES  FOR  DIRECTOR  AND,  IN  THEIR
DISCRETION,  UPON SUCH OTHER BUSINESS AS MAY PROPERLY COME BEFORE THE MEETING. A
stockholder  wishing  to  vote  in  accordance  with  the  Board  of  Directors'
recommendation  need only sign and date this proxy and return it in the envelope
provided.

The undersigned hereby acknowledges receipt of a copy of the accompanying Notice
of Annual Meeting of Stockholders,  the Proxy Statement with respect thereto and
the  Corporation's  1998 Annual Report to  Stockholders  and hereby  revokes any
proxy or proxies  heretofore given. This proxy may be revoked at any time before
it is exercised.

- --------------------------------------------------------------------------------
    PLEASE VOTE, DATE AND SIGN ON REVERSE AND RETURN PROMPTLY IN THE ENCLOSED 
                                    ENVELOPE.
- --------------------------------------------------------------------------------


- --------------------------------------------------------------------------------
Please sign exactly as your name(s) appear(s) on the books of the Corporation.
Joint owners should each sign personally. Trustees and other fiduciaries should
indicate the capacity in which they sign, and where more than one name appears,
a majority  must sign. If a  corporation,  this  signature  should be that of an
authorized officer who should state his or her title.
- --------------------------------------------------------------------------------

HAS YOUR ADDRESS CHANGED?              DO YOU HAVE ANY COMMENTS?

- ---------------------------           ----------------------------------

- ---------------------------           ----------------------------------

- ---------------------------           ----------------------------------


<PAGE>


<TABLE>
<CAPTION>
<S>                                                    <C>    
[ X]  PLEASE MARK VOTES
      AS IN THIS EXAMPLE
- ------------------------------------                   1. Proposal to elect the following Directors: For All     With-   For All
      VICOR CORPORATION                                                                              Nominees    hold    Except
- ------------------------------------                   M. Michael Ansour     Jay M. Prager            [ ]        [ ]      [ ]
       COMMON STOCK                                    Estia J. Eichten      David T. Riddiford                            
                                                       Barry Kelleher        Patrizio Vinciarelli               
                                                       
                                                       If you do not  wish  your shares voted  "For" a particular nominee, mark
                                                       the "For All  Except" box and strike a line through the name(s)of the
                                                       nominee(s). Your shares will  be  voted  for  the remaining nominee(s).

                                            -------    Mark box at right if an address change or comment has [ ]  
Please be sure to sign and date this Proxy.  Date      been noted on the reverse side of this card.
- ----------------------------------------------------

- ---Stockholder sign here----------Co-owner sign here----------------

Detach Card                                                         Detach  Card

                                VICOR CORPORATION

Dear Stockholder,

Please take note of the  important  information  enclosed  with this Proxy Card,
which  includes   issues  related  to  the  management  and  operation  of  your
Corporation  that require  your  immediate  attention  and  approval.  These are
discussed in detail in the enclosed proxy materials.

Your vote counts, and you are strongly encouraged to exercise your right to vote
your shares.

Please  mark the boxes on this proxy card to  indicate  how your  shares will be
voted.  Then sign the card, detach it and return your proxy vote in the enclosed
postage paid envelope.

Your vote must be received prior to the Annual Meeting of  Stockholders  on June
24, 1999.

Thank you in advance for your prompt consideration of these matters.

Sincerely,

Vicor Corporation
</TABLE>


<PAGE>


                                                                Form of Proxy

CLASS B COMMON                 VICOR CORPORATION                CLASS B COMMON

            PROXY FOR ANNUAL MEETING OF STOCKHOLDERS - JUNE 24, 1999

           THIS PROXY IS SOLICITED  ON BEHALF OF THE BOARD OF DIRECTORS AND
                    MAY BE REVOKED PRIOR TO ITS EXERCISE.

The undersigned hereby constitutes and appoints Patrizio Vinciarelli and Mark A.
Glazer,  and each of them,  as  Proxies of the  undersigned,  with full power to
appoint his substitute, and authorizes each of them to represent and to vote all
shares of Class B Common Stock of Vicor Corporation (the  "Corporation") held by
the  undersigned  at the close of  business  on April 30,  1999,  at the  Annual
Meeting of  Stockholders  to be held at the Andover  Country Club, 60 Canterbury
Street, Andover,  Massachusetts,  on Thursday, June 24, 1999 at 5:00 p.m., local
time, and at any adjournments or postponements thereof.

When properly  executed,  this proxy will be voted in the manner directed herein
by the undersigned stockholder(s).  IF NO DIRECTION IS GIVEN, THIS PROXY WILL BE
VOTED  FOR  THE  ELECTION  OF ALL  THE  NOMINEES  FOR  DIRECTOR  AND,  IN  THEIR
DISCRETION,  UPON SUCH OTHER BUSINESS AS MAY PROPERLY COME BEFORE THE MEETING. A
stockholder  wishing  to  vote  in  accordance  with  the  Board  of  Directors'
recommendation  need only sign and date this proxy and return it in the envelope
provided.

The undersigned hereby acknowledges receipt of a copy of the accompanying Notice
of Annual Meeting of Stockholders,  the Proxy Statement with respect thereto and
the  Corporation's  1998 Annual Report to  Stockholders  and hereby  revokes any
proxy or proxies  heretofore given. This proxy may be revoked at any time before
it is exercised.

- --------------------------------------------------------------------------------
    PLEASE VOTE, DATE AND SIGN ON REVERSE AND RETURN PROMPTLY IN THE ENCLOSED 
                                    ENVELOPE.
- --------------------------------------------------------------------------------


- --------------------------------------------------------------------------------
Please sign exactly as your name(s) appear(s) on the books of the Corporation.
Joint owners should each sign personally. Trustees and other fiduciaries should
indicate the capacity in which they sign, and where more than one name appears,
a majority  must sign. If a  corporation,  this  signature  should be that of an
authorized officer who should state his or her title.
- --------------------------------------------------------------------------------

HAS YOUR ADDRESS CHANGED?              DO YOU HAVE ANY COMMENTS?

- ---------------------------           ----------------------------------

- ---------------------------           ----------------------------------

- ---------------------------           ----------------------------------


<PAGE>


<TABLE>
<CAPTION>
<S>                                                    <C>    
[ X]  PLEASE MARK VOTES
      AS IN THIS EXAMPLE
- ------------------------------------                   1. Proposal to elect the following Directors: For All     With-    For All
      VICOR CORPORATION                                                                              Nominees    hold      Except
- -----------------------------------                    M.Michael Ansour      Jay M. Prager             [ ]       [ ]        [ ] 
      CLASS B COMMON STOCK                             Estia J. Eichten      David T. Riddiford            
                                                       Barry Kelleher        Patrizio Vinciarelli                                  
                                                       
                                                       If you do not  wish  your shares voted "For" a particular nominee, 
                                                       mark the "For All Except" box and strike a line through the name(s)of the
                                                       nominee(s). Your shares will  be  voted  for  the remaining nominee(s).
                                           -------
Please be sure to sign and date this Proxy.   Date     Mark box at right if an address change or comment has [ ] 
- ----------------------------------------------------   been noted on the  reverse side of this card.

- ---Stockholder sign here----------Co-owner sign here----------------

Detach Card                                                         Detach  Card

                                VICOR CORPORATION

Dear Stockholder,

Please take note of the  important  information  enclosed  with this Proxy Card,
which  includes   issues  related  to  the  management  and  operation  of  your
Corporation  that require  your  immediate  attention  and  approval.  These are
discussed in detail in the enclosed proxy materials.

Your vote counts, and you are strongly encouraged to exercise your right to vote
your shares.

Please  mark the boxes on this proxy card to  indicate  how your  shares will be
voted.  Then sign the card, detach it and return your proxy vote in the enclosed
postage paid envelope.

Your vote must be received prior to the Annual Meeting of  Stockholders  on June
24, 1999.

Thank you in advance for your prompt consideration of these matters.

Sincerely,

Vicor Corporation
</TABLE>




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