VICOR CORP
10-K405, 2000-03-28
ELECTRONIC COMPONENTS, NEC
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 10-K

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


             (Mark One)
            [X] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

                   For the fiscal year ended December 31, 1999
                                             -----------------------------------

          [ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

                        For the transition period from____________ to__________

                         Commission file number 0-18277

                                VICOR CORPORATION
                                -----------------
             (Exact name of registrant as specified in its charter)

                               Delaware                 04-2742817
                               --------                 ----------
                  (State or other jurisdiction of       (IRS employer
                   incorporation or organization)        identification no.)

                 25 FRONTAGE ROAD, ANDOVER, MASSACHUSETTS 01810
                 ----------------------------------------------
               (Address of principal executive offices) (Zip code)

       Registrant's telephone number, including area code: (978) 470-2900
                                                          ----------------

        Securities registered pursuant to Section 12(b) of the Act: None

           Securities registered pursuant to Section 12(g) of the Act:

                          Common Stock, $.01 par value

                          ----------------------------
                                (Title of Class)

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days. YES [X] NO [ ]

Indicate by check mark if disclosure of delinquent  filers  pursuant to Item 405
of Regulation  S-K is not contained  herein,  and will not be contained,  to the
best of registrant's  knowledge,  in definitive proxy or information  statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. [X]

The  aggregate  market value of the voting stock held by  non-affiliates  of the
registrant was approximately $459,434,544 as of February 29, 2000.

On February 29, 2000, there were 30,472,553  shares of Common Stock  outstanding
and 12,011,348 shares of Class B Common Stock outstanding.

                       DOCUMENTS INCORPORATED BY REFERENCE

Portions of the Company's  definitive  proxy  statement (the  "Definitive  Proxy
Statement") to be filed with the Securities and Exchange  Commission pursuant to
Regulation 14A and relating to the Company's 2000 annual meeting of stockholders
are incorporated by reference into Part III.


<PAGE>


PART I

     This Annual Report on Form 10-K contains forward-looking  statements within
the  meaning of Section  27A of the  Securities  Act of 1933,  as  amended,  and
Section 21E of the Securities Exchange Act of 1934, as amended. You can identify
forward-looking  statements  by  our  use  of  the  words  "believe,"  "expect,"
"anticipate,"  "  intend,"  "  estimate,"  "plan,"  "assume"  and other  similar
expressions  in the Form 10-K that predict or indicate  future  events or trends
that do not relate to historical matters. Actual results could differ materially
from those  projected in the  forward-looking  statements  as a result of, among
other factors,  the risk factors set forth in this report.  Reference is made in
particular   to  the   discussions   set  forth  under  Item  1  -  "Business  -
Second-Generation  Automated  Manufacturing Line," "- Competition," "- Patents,"
"- Licensing," and "- Risk Factors," and under Item 7 - "Management's Discussion
and Analysis of Financial Condition and Results of Operations."

ITEM 1 - BUSINESS

THE COMPANY

     Vicor  Corporation was incorporated in Delaware in 1981. Unless the context
indicates  otherwise,  the  term  "Company"  means  Vicor  Corporation  and  its
consolidated  subsidiaries.  The Company  designs,  develops,  manufactures  and
markets modular power components and complete power systems using an innovative,
patented,  high frequency  electronic power conversion  technology  called "zero
current  switching." Power systems,  a central element in any electronic system,
convert power from a primary power source (e.g.,  a wall outlet) into the stable
DC voltages that are required by most contemporary electronic circuits.

     In 1987, the Company formed VLT Corporation as its licensing subsidiary. In
1990,  the  Company  established  a  Technical  Support  Center in Germany and a
foreign sales  corporation  (FSC).  In 1995, the Company  established  Technical
Support  Centers in France,  Italy,  Hong Kong,  and England.  Also in 1995, the
Company  established Vicor  Integration  Architects  (VIAs),  which are majority
owned  subsidiaries.  VIAs provide customers with local design and manufacturing
services  for turnkey  custom power  solutions.  At December 31, 1999 there were
five (5) VIAs operating in the United States.  In 1996, the Company  established
Vicor B.V.,  a  Netherlands  company,  which  serves as a European  Distribution
Center.  In 1998,  the Company  acquired the  principal  assets of the switching
power supply businesses owned by the Japan Tobacco, Inc. group and established a
direct  presence in Japan through a new  subsidiary  called Vicor Japan Company,
Ltd.  ("VJCL").  VJCL  markets and sells the  Company's  products  and  provides
customer  support in Japan. The Company's Common Stock became publicly traded on
the NASDAQ National Market System in April 1990.

PRODUCTS

     Power systems are incorporated into virtually all electronic products, such
as computers and telecommunication  equipment,  to convert electric power from a
primary source, for example a wall outlet,  into the stable DC voltages required
by electronic  circuits.  Because  power  systems are  configured in a myriad of
application-specific  configurations, the Company's basic strategy is to exploit
the  density  and   performance   advantages  of  its   technology  by  offering
comprehensive families of economical,  component-level building blocks which can
be applied by users to easily  configure a power system specific to their needs.
In addition to  component-level  power converters,  which serve as modular power
system  building  blocks,  the  Company  also  manufactures  and sells  complete
configurable power systems,  accessory products, and custom power solutions. The
Company's principal product lines include:

     Modular Power Converters

     The   Company   currently   offers   four   first-generation   families  of
component-level DC-DC power converters:  the VI-200,  VI-J00, MI-200, and MI-J00
families.  Designed to be mounted  directly on a printed  circuit board assembly
and soldered in place using contemporary  manufacturing  processes,  each family
comprises a  comprehensive  set of products which are offered in a wide range of
input voltage, output voltage and power ratings. This allows end users to select
products appropriate to their individual applications.


<PAGE>


     The  product   families  differ  in  maximum  power  ratings,   performance
characteristics,  package size and, in the case of the "MI" families,  in target
market.  The  MI  families  are  designed  specifically  to  meet  many  of  the
performance and environmental requirements of the military/defense markets.

     In  1998,  the  Company   introduced  the  first  complete  family  of  its
second-generation of high power density,  component-level DC-DC converters. This
family  operates from 48 Volts input and is designed for the  telecommunications
market as well as distributed power systems.  It consists of twenty-six  modules
with  the  most  popular   output   voltages  in  all  three  of  the  Company's
second-generation  standard packages: the full size (Maxi), the half size (Mini)
and the new quarter size  (Micro).  Output power levels from 50 to 500 Watts are
covered by this offering. In 1999, this was followed by two additional families:
a 300 Volt input for  off-line  (rectified  115 or 230 Volt ac) and  distributed
power applications,  and a 375 Volt input specifically designed for use in power
factor  corrected  systems.  This latter family increased the power available to
600 Watts.

     Configurable Products

     Utilizing  its  standard  converters  as core  elements,  the  Company  has
developed  several  product  families  which provide  complete  power  solutions
configured to a customer's  specific needs.  These products exploit the benefits
of the  component-level  approach  to offer  higher  performance,  higher  power
densities, lower costs, greater flexibility and faster delivery than traditional
competitive offerings.

     Most  electronic  and data  processing  ("EDP") and  industrial  electronic
products  operate  directly off of AC lines.  "Off-line"  power systems  require
"front end"  circuitry  to convert AC line  voltage into DC voltage for the core
converters.  The Company's off-line AC-DC products  incorporate a set of modular
front end subassemblies to offer a complete power solution from AC line input to
highly regulated DC output. The product selection includes a low-profile modular
design in  various  sizes  and power  levels,  and a choice of  alternatives  to
conventional   "box   switchers"--high   power,   off-line   bulk   supplies  in
industry-standard packages. Voltage and power levels are either factory or field
configurable.

     Many  telecommunications,  defense and industrial  electronic  products are
powered from central DC sources  (battery plants or  generators).  The Company's
DC-DC power system choices  include a low-profile  modular design similar to the
corresponding AC-DC system and a rugged,  compact assembly for  chassis-mounted,
bulk power applications.

     Accessory Power System Components

     Accessory power system components,  used with the Company's component-level
power  converters,  integrate  other  important  functions of the power  system,
facilitating  the design of complete  power systems by  interconnecting  several
modules.  In general,  accessory  products are used to condition  the inputs and
outputs of the Company's modular power components.

     VI-HAMs    (Harmonic    Attenuator    Modules)   are    universal-AC-input,
power-factor-correcting  front ends for use with  compatible  power  converters.
VI-AIMs (AC Input Modules)  provide input  filtering,  transient  protection and
rectification of the AC line. VI-IAMs (Input Attenuator  Modules) provide the DC
input   filtering  and   transient   protection   required  in  industrial   and
telecommunications   markets.  VI-RAMs  (Ripple  Attenuator  Modules)  condition
converter  module outputs for extremely low noise systems.  In 1998, the Company
doubled the power capability of its component-level AC front end, the VI-ARM (AC
Rectifier  Module).  This new front end product is packaged in the same  "Micro"
package and includes a microcontroller that tracks the AC line to ensure correct
operation  for  domestic  or  international  line  voltages.  In  addition,  two
accessory  products  for  the  48  Volt  input  second-generation   family  were
introduced in 1999: the FiltMod for input  filtering and the IAM48 for transient
and spike protection.

     Customer Specific Products

     Since its inception,  the Company has accepted a certain amount of "custom"
power  supply  business.  In most  cases,  the  customer  was unable to obtain a
conventional  solution  which could achieve the desired level of  performance in
the available  space.  By utilizing its  component-level  power products as core
elements in developing most of these products,  the Company was able to meet the
customer's needs with a reliable,  high power density, total solution.  However,
in keeping with the Company's strategy of focusing on sales of standard


<PAGE>


families of component-level power building blocks, custom product sales have not
been  directly  pursued.  The Company has  traditionally  pursued  these  custom
opportunities   through   Value-Added-Resellers   ("VARs").   The   Company  has
established  a  network  of Vicor  Integration  Architects  ("VIAs")  (see  "The
Company," above in Item 1 - "Business"). VIAs are majority owned by the Company,
while  VARs are  independent  businesses.  Both  VIAs  and VARs are  distributed
geographically and are in close proximity to many of their customers.

SALES AND MARKETING

     The Company sells its products  through a network of 34  independent  sales
representative  organizations  in North and South America;  internationally,  38
independent  distributors are utilized.  Sales activities are managed by a staff
of  Regional  and  Industry  Sales  Managers  and sales  personnel  based at the
Company's world headquarters in Andover, Massachusetts,  its Westcor division in
Sunnyvale,  California, a Technical Support Center in Lombard,  Illinois, and in
its Technical Support Center subsidiaries in Munich, Germany;  Camberley Surrey,
England; Milan, Italy; Paris, France; Hong Kong and Tokyo, Japan.

     Export sales,  as a percentage of total net  revenues,  were  approximately
30%, 29%, and 31%, in 1999, 1998, and 1997, respectively. The decrease in export
sales during 1999 and 1998 as compared to 1997 was  primarily  due to a decrease
in revenue earned from the sale of automated manufacturing line equipment.

     Because of the technical nature of the Company's product lines, the Company
engages a staff of Field  Applications  Engineers to support the Company's sales
activities.  Field Applications Engineers provide direct technical sales support
worldwide to review new  applications  and  technical  matters with existing and
potential  customers.  There are Field  Application  Engineers  assigned  to all
Company  locations  and are  supported  by  product  specialists  (Product  Line
Engineers)  located In Andover.  The Company  generally  warrants  its  standard
products for a period of two years.

     The Company also sells  directly to customers  through  Vicor  Express,  an
in-house  distribution  group.  Through  advertising and periodic mailing of its
catalogs,  Vicor Express  generally  offers  customers  rapid  delivery on small
quantities  of many standard  products.  The Company,  through  Vicor B.V.,  has
expanded its Vicor Express operation to include locations in Germany, France and
Italy.

CUSTOMERS AND APPLICATIONS

     The  Company's  customer  base is  comprised  of large  Original  Equipment
Manufacturers  (OEMs)  and  smaller,   lower  volume  users  which  are  broadly
distributed  across  several  major market  areas.  Some examples of the diverse
applications of the Company's products are:

  Telecommunications:                    EDP:
       Central Office Systems               Workstations
       Fiber Optic Systems                  Supercomputers
       Cellular Telecommunications          Data Storage Systems
       Microwave Communications             ATM Switches
       Voice Processing Multiplexers        Networking Equipment
       Paging Equipment                     LAN/WAN Systems
       Broadcast Equipment                  File Servers
                                            RAID Systems

  Measurement and Control:               Military:
       Process Control Equipment            Communications
       Medical Equipment                    Airborne Radar and Displays
       Seismic Equipment                    Aircraft/Weapons Test Equipment
       Test Equipment                       Ruggedized Computers
       Transportation Systems               Electro-Optical Systems
       Agricultural Equipment               IR Reconnaissance/Targeting Systems
       Marine Products


<PAGE>


     For the years ended  December 31, 1999,  1998 and 1997, no single  customer
accounted for more than 10% of net revenues.

BACKLOG

     As of December 31, 1999, the Company had a backlog of  approximately  $58.7
million compared to $37.0 million at December 31, 1998.  Backlog is comprised of
orders for products which have a scheduled  shipment date within the next twelve
months.  The Company maintains most standard converter products in inventory and
manufactures  other standard,  modified standard and custom products pursuant to
firm  orders from  customers.  The Company  believes  that due to its  increased
production   capacity  and  its  ability  to  respond   quickly  to   customers'
requirements,  a  substantial  portion  of sales in each  quarter  is,  and will
continue to be, derived from orders booked in the same quarter.

RESEARCH AND DEVELOPMENT

     As a basic element of its long term  strategy,  the Company is committed to
the continued  advancement of power  conversion  technology and power  component
product development.  The Company's research and development efforts are focused
in three areas:  continued  enhancement  of the Company's  patented  technology;
expansion of the Company's families of component level DC-DC converter products;
and  continued   development   of   configurable   products  based  upon  market
opportunities.  The Company invested approximately $19.9 million, $20.7 million,
and  $17.7  million,  in  research  and  development  in 1999,  1998  and  1997,
respectively.  Investment in research and development  represented 10.5%, 12.5%,
and 10.9%, of net revenues in 1999, 1998 and 1997. The Company plans to continue
to invest a significant percentage of revenues into research and development.

MANUFACTURING

     The  Company's  principal  manufacturing  processes  consist of assembly of
electronic  components  onto  printed  circuit  boards,   automatic  testing  of
components,  wave,  reflow  and  infrared  soldering  of  assembled  components,
encapsulation  of converter  subassemblies,  final "burn-in" of certain products
and product test using automatic test equipment.

     The Company  continues to pursue its strategy to minimize  manual  assembly
processes,  reduce manufacturing costs, increase product quality and reliability
and ensure its ability to rapidly and effectively expand capacity.  The strategy
is based upon the  phased  acquisition  and/or  fabrication,  qualification  and
integration  of  automated  manufacturing  equipment.  In  accordance  with this
strategy,  the Company purchased a building in December 1994, with approximately
136,000  square  feet.  In 1999,  the Company  completed  an  expansion  of this
building  (see  Item  2  -  Properties)  and  relocated  certain   manufacturing
operations  from a leased facility to this building.  The Company  continues the
process of installing its automated  manufacturing  lines in these premises (see
"Second-Generation  Automated  Manufacturing Line," below),  including automated
manufacturing lines acquired from Japan Tobacco, Inc. (see "Licensing," below).

     Components  used in the Company's  products are purchased from a variety of
vendors.  Most  of the  components  are  available  from  multiple  sources.  In
instances of single source items, the Company  maintains what it considers to be
appropriate  levels of inventories.  Incoming  components,  assemblies and other
parts are subjected to several levels of inspection procedures.

     Compliance by the Company with  applicable  environmental  laws has not had
any material effect on the financial condition or operations of the Company.

SECOND-GENERATION AUTOMATED MANUFACTURING LINE

     Shipments of second-generation products, which included the introduction of
the 300 and 375 Volt families of products,  increased during 1999  approximately
four-fold  over 1998.  Both  first and  second-generation  products  are sold to
similar  customers.  The Company  continues  to refine the  designs,  processes,
equipment and parts  associated  with  second-generation  products.  The Company
began depreciation on a significant portion of the  second-generation  automated
manufacturing line,  approximately $32.5 million, in the second quarter of 1998.
Depreciation  on another  $1.6 million of the line  commenced  during the second
half of 1998.


<PAGE>


Approximately  $3.3 million of this line will be depreciated on a  straight-line
basis over a period of five  years,  and  approximately  $30.8  million  will be
depreciated on a  straight-line  basis over a period of eight years.  Additional
equipment of  approximately  $6.4  million was placed into service  during 1999.
While production rates in the second half of 1999 were sufficient to absorb this
depreciation  and other fixed and variable costs  associated with the ramp-up of
production of  second-generation  products,  gross margins on  second-generation
products  currently  are  significantly  lower  than  those of  first-generation
products.  Gross margins  during 2000 will  continue to be  negatively  impacted
until  higher  production  volumes,  higher  yield  levels  and  component  cost
reductions are attained.

COMPETITION

     Many power  supply  manufacturers  target  markets  similar to those of the
Company.  Representative  examples  are:  Lambda  Electronics,  a subsidiary  of
Invensys,  plc; Lucent  Technologies;  Artesyn  Technologies  (formerly Computer
Products,  Inc. and Zytec  Corporation);  Astec America, a subsidiary of Emerson
Electronic  Company;   Power-One,  Inc.;  and  C&D  Technologies,   Inc.,  Power
Electronics  Division.  Although  certain  of  the  Company's  competitors  have
significantly  greater  financial and marketing  resources and longer  operating
histories  than  the  Company,  the  Company  believes  that  it  has  a  strong
competitive  position,  particularly with customers who need small, high density
power system solutions requiring a variety of input-output configurations.

PATENTS

     The Company  believes  that its patents  afford  significant  advantages by
erecting fundamental and multilayered barriers to competitive  encroachment upon
key features and performance  benefits of its principal  product  families.  The
Company's  patents cover the fundamental  conversion  topologies used to achieve
the  performance  attributes of its converter  product  lines;  converter  array
architectures  which are the basis of the products'  "parallelability";  product
packaging design; product construction;  high frequency magnetic structures; and
automated equipment and methods for circuit and product assembly.

     On February 16, 1999, the United States Patent and Trademark  Office issued
U.S.  patent  RE36,098  (the  "Reissue  Patent")  as a  reissue  of U.S.  Patent
4,441,146 (the "Reset  Patent").  The Reissue Patent includes  original claims 1
through 5 of the Reset Patent plus 38 additional  new claims.  The claims in the
Reissue Patent cover non-coincident active clamp technology in a broadly defined
class of single-ended  forward  converters and enable design of power converters
which are smaller and more energy  efficient than  conventional  power supplies.
The claims cover,  but are not limited to,  so-called  "zero-voltage  switching"
("ZVS") technology.  The Company believes that its rights under the Reset Patent
and the Reissue Patent have been and are being  infringed.  The Company believes
in  vigorously  protecting  its rights  under its  patents  (see "Item 3 - Legal
Proceedings,"  below).  The Reset  Patent has been  asserted in an  infringement
lawsuit brought by the Company against Unitrode Corporation.

     The Company  has been  issued  sixty  patents in the United  States  (which
expire  between 2001 and 2017),  seventeen in Europe (which expire  between 2002
and 2015 and  which  comprise  a total of  fifty-one  issued  patents  in twelve
countries),  and nineteen in Japan  (which  expire  between 2002 and 2015).  The
Company also has a number of patent  applications  pending in the United States,
Europe and the Far East.  Although  the  Company  believes  that  patents are an
effective way of protecting its technology,  there can be no assurances that the
Company's patents will prove to be enforceable (see, e.g., "Legal  Proceedings",
below).  While some of the Company's patents are deemed materially  important to
the Company's  operations,  the Company believes that no one patent is essential
to the success of the Company.

LICENSING

     In addition to generating revenue, licensing is an element of the Company's
strategy for building  worldwide  product and  technology  acceptance and market
share. In granting  licenses,  the Company retains the right to use its patented
technologies,  and manufacture and sell its products, in all licensed geographic
areas and fields of use.  Licenses  are  granted  and  administered  through the
Company's wholly owned  subsidiary,  VLT  Corporation,  which owns the Company's
patents.  Revenues  from  licensing  arrangements  have not  exceeded 10% of the
Company's consolidated revenues in any of the last three fiscal years.


<PAGE>


     On July 6, 1999 and on September 10, 1999,  the Company  announced  that it
had entered into license agreements with Nortel Networks Corporation  ("Nortel")
and Astec Advanced Power  Susystems Ltd.  ("Astec"),  respectively,  under which
Nortel and Astec  acquired  non-exclusive  rights to use the Company's  patented
"reset" technology in their power conversion  products.  Reset technology (which
has also  become  known in the  power  conversion  industry  as  "active  clamp"
technology)  enables design of  "zero-voltage  switching" power converters which
are smaller and more energy efficient than conventional power supplies.

     On June 4, 1998,  the Company  entered  into an agreement to acquire all of
the principal assets and the power supply business of JT Electronics Corporation
and JT PowerCraft,  in Japan. Both companies were subsidiaries of Japan Tobacco,
Inc. ("JT"), the Company's licensee in Japan at the time. Under the terms of the
agreement,  JT continued to provide  certain  services in Japan,  including  the
manufacture  of  products,  through  the end of 1998,  at which time its license
terminated.  The final royalty  revenue from JT under the license  agreement was
recognized in the first quarter of 1999. The Company  founded VJCL (see "Item 1-
"Business")  to operate in the  Japanese  market and is  applying  the  acquired
assets to service and expand its power supply business in Japan.

EMPLOYEES

     As of December 31, 1999, the Company employed approximately 1,427 full time
and 241 part time  people.  The  Company  believes  that its  continued  success
depends,  in part,  on its  ability to attract and retain  qualified  personnel.
Although there is strong demand for qualified technical  personnel,  the Company
has not to date  experienced  difficulty in attracting and retaining  sufficient
engineering  and  technical  personnel  to meet its needs (See  "Risk  Factors -
Dependence on Key Personnel," below).

     None of the  Company's  employees  is  subject to a  collective  bargaining
agreement.  The Company has not experienced any work stoppages and believes that
its employee relations are good.

RISK FACTORS

     This Annual Report on Form 10-K contains forward-looking  statements within
the  meaning of Section  27A of the  Securities  Act of 1933,  as  amended,  and
Section 21E of the Securities  Exchange Act of 1934, as amended.  Actual results
could differ materially from those projected in the  forward-looking  statements
as a result of, among other factors, the risk factors set forth below.

     Need for Technological Developments

     The power supply industry and the industries in which many of our customers
operate are characterized by intense  competition,  rapid technological  change,
product obsolescence and price erosion for mature products,  each of which could
adversely affect the Company's results of operations. The failure of the Company
to continue to develop and commercialize  leading-edge technologies and products
that are cost  effective  and maintain high  standards of quality,  could have a
material  adverse  affect on the Company's  competitive  position and results of
operations.

     Dependence on Customers' Business Prospects

     The Company  manufactures  modular power  components and power systems that
are incorporated into its customers'  electronic products.  The Company's growth
is therefore  dependent on the continued  growth in the sales of its  customers'
products  as well as the  development  by its  customers  of new  products.  The
failure of the Company to anticipate  changes in our  customers'  businesses and
their changing product needs could negatively impact our financial position.


<PAGE>



     Need to Provide Additional Manufacturing Capacity

     In order to meet  anticipated  future  growth,  the  Company  will  need to
increase manufacturing capacity through the installation of additional equipment
and additional  automated  manufacturing  lines.  This will increase fixed costs
which could impact the Company's gross margins and  profitability.  In addition,
the process of installing equipment, new lines and other capacity measures could
cause disruptions in production or delays in the shipping of products.

     Dependence on Third Party Suppliers and Subcontractors

     The Company depends on third party suppliers and  subcontractors to provide
components and assemblies used in our products.  If suppliers or  subcontractors
cannot provide their  products or services,  the Company may not be able to meet
the demand for its  products or it may  negatively  affect  delivery  times.  In
addition,  the Company cannot  directly  control the quality of the products and
services  provided by third  parties.  In order to grow, the Company may need to
find new or change  existing  suppliers  and  subcontractors.  This could  cause
disruptions  in  production,  delays in the  shipping of product or increases in
prices paid to third-parties.

     Foreign Sales and Distribution

     International  sales  have  been  and  are  expected  to  be a  significant
component  of total sales.  Dependence  on foreign  third  parties for sales and
distribution  is subject to special  concerns,  such as:  foreign  economic  and
political instability,  foreign currency controls and market fluctuations, trade
barriers and tariffs, foreign regulations and exchange rates.

     Dependence on Key Personnel

     The Company's  success depends on our ability to retain the services of its
executive  officers.  The loss of one or more members of senior management could
adversely affect the Company's  business and financial  results.  In particular,
the Company is  dependent  on the  services  of Dr.  Patrizio  Vinciarelli,  its
Chairman, President and Chief Executive Officer. The loss of the services of Dr.
Vinciarelli could have a material adverse effect on the Company's development of
new products and on its results of operations.  In addition, the Company depends
on highly skilled  engineers and other personnel with technical  skills that are
in high demand and are difficult to replace.  The Company's continued operations
and growth  depends  on its  ability to  attract  and  retain  highly  qualified
employees in a very competitive employment market.

     Patents and Proprietary Rights

     The Company operates in an industry in which the ability to compete depends
on the  development or acquisition  of  proprietary  technologies  which must be
protected  to  preserve  the  exclusive  use of such  technologies.  The Company
devotes  substantial   resources  to  establish  and  protect  our  patents  and
proprietary  rights,  and  relies on patent  and  intellectual  property  law to
protect such rights.  Such protection,  though, may not prevent competitors from
independently developing products similar or superior to the Company's products.
The Company  may be unable to protect or enforce  current  patents,  may rely on
unpatented  technology  that  competitors  could  restrict  or may be  unable to
acquire patents in the future.  In addition,  the intellectual  property laws of
foreign  countries  may not protect the  Company's  rights to the same extent as
those of the  United  States.  In the  event the  Company  may need to defend or
challenge  patents,  it may entail  significant  costs and resources which could
have a material adverse effect on its results of operations.

ITEM 2 - PROPERTIES

     During  1998,  the  Company  completed  construction  of  a  new  corporate
headquarters  building on a site adjacent to its prior headquarters  building in
Andover,  Massachusetts.  The building provides approximately 90,000 square feet
of  office  space  for its  sales,  marketing,  engineering  and  administration
personnel.


<PAGE>

     The Company's lease on its prior corporate headquarters building expired on
October 31, 1999. The manufacturing equipment held in this building was moved to
the Company's  manufacturing  facility in Andover,  Massachusetts,  prior to the
lease termination.

     The Company also owns a building of  approximately  136,000 square feet, in
Andover,  Massachusetts.  During 1999, the Company  completed  construction of a
94,000  square  foot  expansion  of  this  building,   which   consolidates  all
Massachusetts manufacturing activities into one facility.

     The   Company's   Westcor   division   owns  and  occupies  a  building  of
approximately 31,000 square feet in Sunnyvale, California.

ITEM 3 - LEGAL PROCEEDINGS

     On  February  1, 1999,  the  Company  announced  that it had  concluded  an
arrangement  under which  Vicor and Reltec  Corporation  entered  into a license
agreement and agreed to settle all pending  litigation and disputes  relating to
Reltec's past use of certain Vicor intellectual  property.  In consideration for
the license under the Company's  reset patents,  and the separate  settlement of
the litigation,  Reltec made a one-time  payment of $22.5 million into an escrow
account.  Vicor is obligated to make know-how and technical support available to
Reltec under the license and will receive and  recognize  income from the escrow
fund into the year 2001.

     The Company is involved in certain litigation  incidental to the conduct of
its  business.  While the  outcome of lawsuits  against  the  Company  cannot be
predicted with certainty,  management does not expect any current  litigation to
have a material adverse impact on the Company (see "Licensing," above).

ITEM 4 - SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

     None.

PART II

ITEM 5 - MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS

     The Common Stock of the Company is listed on the National  Market System of
the National  Association of Securities Dealers Automated  Quotation  ("NASDAQ")
System and is traded in the  over-the-counter  market  under the  NASDAQ  symbol
"VICR".  The Class B Common Stock of the Company is not traded on any market and
is subject to restrictions on transfer under the Company's Restated  Certificate
of  Incorporation.  The following  table sets forth the  quarterly  high and low
sales  prices  for the  Common  Stock as  reported  by  NASDAQ  for the  periods
indicated:

1998                                High                    Low
- ----                                ----                    ---
First Quarter                       29 3/4                  22
Second Quarter                      28 5/8                  12 15/16
Third Quarter                       16 1/2                   7 13/16
Fourth Quarter                      11 7/8                   5   9/16

1999

- ----
First Quarter                       13 7/16                  8 13/16
Second Quarter                      21 5/8                  11   3/4
Third Quarter                       23 3/4                  18
Fourth Quarter                      45 1/4                  21   3/8

     As of February 29, 2000, there were  approximately 420 holders of record of
the  Company's  Common  Stock  and  approximately  26  holders  of record of the
Company's Class B Common Stock. These numbers do not reflect persons or entities
who hold  their  stock in nominee or "street  name"  through  various  brokerage
firms.


<PAGE>


DIVIDEND POLICY

     The Company has not paid cash  dividends on its common equity and it is the
Company's  present  intention to retain earnings to finance the expansion of the
Company's business.

ITEM 6 - SELECTED FINANCIAL DATA

     The  following  selected  consolidated  financial  data with respect to the
Company's  statements of income for the years ended December 31, 1999,  1998 and
1997 and with respect to the  Company's  balance  sheets as of December 31, 1999
and 1998 are derived from the Company's consolidated financial statements, which
appear  elsewhere  in this  report and which have been  audited by Ernst & Young
LLP, independent auditors.  The following selected  consolidated  financial data
with respect to the Company's  statements of income for the years ended December
31,  1996 and 1995  and with  respect  to the  Company's  balance  sheets  as of
December  31,  1997,  1996 and  1995 are  derived  from  the  Company's  audited
consolidated  financial  statements,  which are not  included  herein.  The data
should  be read in  conjunction  with  the  consolidated  financial  statements,
related notes and other financial information included herein.

<TABLE>
<CAPTION>

                             Year Ended December 31
                             ----------------------
                      (in thousands except per share data)

Income Statement Data

- ---------------------
                                             1999           1998            1997           1996           1995
                                             ----           ----            ----           ----           ----
<S>                                      <C>              <C>            <C>            <C>             <C>
Net revenues                              $189,887        $164,634        $162,243        $144,983        $144,022
Income from operations                      24,427          18,365          35,950          36,532          42,632
Net income                                  19,088          15,835          26,217          25,639          29,498
Net income per share -diluted                  .45             .37             .60             .60             .68
Weighted average shares-diluted             42,412          42,785          43,344          42,764          43,295
</TABLE>

<TABLE>
<CAPTION>

                                 At December 31
                                 --------------
                                 (in thousands)

Balance Sheet Data                            1999          1998            1997           1996              1995
- ------------------                            ----          ----            ----           ----              ----
<S>                                         <C>           <C>             <C>             <C>               <C>
Working capital                             $123,017      $ 84,594        $128,267        $108,551          $ 95,900
Total assets                                 268,905       249,551         228,843         186,443           166,997
Total liabilities                             24,372        40,292          20,419          15,699            16,941
Stockholders' equity                         244,533       209,259         208,424         170,744           150,056
</TABLE>

ITEM 7 - MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS

     The  following  table sets forth  certain  items of  selected  consolidated
financial information as a percentage of net revenues for the periods indicated.
This table and the subsequent  discussion should be read in conjunction with the
selected financial data and the Consolidated Financial Statements of the Company
contained elsewhere in this report.

<TABLE>
<CAPTION>

                             Year ended December 31
                             ----------------------

                                                    1999      1998      1997
                                                    ----      ----      ----
<S>                                                <C>        <C>       <C>
Net revenues                                        100.0%    100.0%    100.0%
Gross margin                                         42.8%     44.9%     51.8%
Selling, general and administrative expenses         19.4%     21.2%     18.7%
Research and development expenses                    10.5%     12.5%     10.9%
Income before income taxes                           14.7%     14.1%     25.2%
</TABLE>


<PAGE>



YEAR ENDED DECEMBER 31, 1999 COMPARED TO YEAR ENDED DECEMBER 31, 1998:

     Net revenues for fiscal 1999 were $189,887,000,  an increase of $25,253,000
(15.3%) as  compared to  $164,634,000  for fiscal  1998.  The growth in revenues
resulted  primarily from a net increase in unit shipments of standard and custom
products of  approximately  $14,750,000  and an  increase in license  revenue of
approximately $10,500,000.  The increase in license revenue was primarily due to
non-recurring  payments  from  licensees  for past use of  Vicor's  intellectual
property.

     Gross margin increased  $7,235,000  (9.8%) from $73,949,000 to $81,184,000,
and decreased as a percentage  of net revenues from 44.9% to 42.8%.  The primary
components  of the  increase  in gross  margin  dollars  were an increase in net
revenues and changes in the revenue mix. The primary  components of the decrease
in  gross  margin   percentage   were  an  increase  in   depreciation   on  the
second-generation automated production line of approximately $1,647,000 in 1999,
changes in the revenue mix and a  non-recurring  charge of $700,000 in the first
quarter  of 1999 for exit costs in  connection  with the  relocation  of certain
manufacturing   operations  from  a  leased  facility  to  the  Company's  owned
manufacturing facility at Federal Street in Andover, Massachusetts.  These items
were offset by the increase in net revenues.

     Selling,  general,  and  administrative  expenses were  $36,831,000 for the
year, an increase of $1,897,000  (5.4%) over fiscal 1998. As a percentage of net
revenues,  selling,  general and administrative expenses decreased from 21.2% to
19.4%.  The principal  components  of the  $1,897,000  increase were  $2,290,000
(176.6%) of increased selling,  general and administrative  expenses incurred by
Vicor Japan Company Ltd. ("VJCL"), which began operations in July 1998, $894,000
of payroll tax expense  associated with the exercise of stock options,  $710,000
(38.1%) of increased  depreciation and amortization expense and $460,000 (43.6%)
of increased  facility  costs.  The principle  components  offsetting  the above
increase were  $1,382,000  (35.1%) of decreased  advertising  costs and $978,000
(47.2%) of decreased legal expenses.  The decrease in advertising costs were due
to a  reduction  in the use of  printed  materials  and to  lower  international
advertising  expense.  Legal  expense,  in the third  quarter of 1998,  included
approximately  $700,000 of legal costs incurred in connection with  intellectual
property litigation.

     Research and development expenses decreased $724,000 (3.5%) to $19,926,000,
and decreased as a percentage of net revenues to 10.5% from 12.5%. The principal
components  of the  $724,000  decrease  were  $2,404,000  (19.1%)  of  decreased
compensation  expense in the research and  development  departments due to these
departments  transitioning  from research and development to manufacturing  cost
centers.  These cost  centers  are  charged  to cost of sales and are  primarily
related  to the  second-generation  automated  production  line.  The  principle
components  offsetting  the above  decrease were  $895,000  (32.6%) of increased
project material costs;  $574,000 (106.4%) of increased research and development
costs  associated  with VJCL and  $299,000  (47.5%) of  increased  research  and
development  costs  associated  with  the  operations  of the  Vicor  Integrated
Architects  ("VIAs").  The Company has a long-term commitment to reinvesting its
profits in new product  design and  development in order to maintain and improve
its competitive position.

     Other income decreased  $1,483,000  (30.1%) to $3,439,000.  Other income is
primarily  comprised of interest income which was derived from invested cash and
cash  equivalents,  as well as a note  receivable  associated with the Company's
real estate  transaction.  Interest income decreased primarily due to a decrease
in the average rates from 1998 to 1999.

     Income  before  income  taxes was  $27,866,000,  an increase of  $4,579,000
(19.7%) compared to 1998. As a percentage of net revenues,  income before income
taxes increased from 14.1% in 1998 to 14.7% in 1999.

     The  provision  for income taxes  totaled  $8,778,000  in 1999  compared to
$7,452,000 in 1998. The Company's  overall tax rate was 31.5% and 32.0% for 1999
and 1998,  respectively.  The decrease in the  effective tax rate was due to the
impact of tax credits in 1999.

     Net income in 1999 increased by $3,253,000 to $19,088,000. Diluted earnings
per share were $.45 in 1999 compared to $.37 in 1998.


<PAGE>



YEAR ENDED DECEMBER 31, 1998 COMPARED TO YEAR ENDED DECEMBER 31, 1997:

     Net revenues for fiscal 1998 were  $164,634,000,  an increase of $2,391,000
(1.5%) as  compared  to  $162,243,000  for fiscal  1997.  The growth in revenues
resulted  primarily from a net increase in unit shipments of standard and custom
products  of  approximately  $8,760,000,  offset  by  reductions  in the sale of
automated  manufacturing  line  equipment  and license  income of  approximately
$5,285,000 and $1,085,000, respectively.

     Gross margin decreased $10,060,000 (12.0%) from $84,009,000 to $73,949,000,
and decreased as a percentage  of net revenues from 51.8% to 44.9%.  The primary
components  of the  fluctuations  in gross margin  dollars and  percentage  were
depreciation  on  the   second-generation   production  line  of   approximately
$3,370,000 in 1998 and to changes in the revenue mix.

     Selling,  general,  and  administrative  expenses were  $34,934,000 for the
year, an increase of $4,607,000 (15.2%) over fiscal 1997. As a percentage of net
revenues,  selling,  general and administrative expenses increased to 21.2% from
18.7%.  The principal  components  of the  $4,607,000  increase were  $1,481,000
(12.6%)  of  compensation  expense  due to annual  pay  increases  and growth in
staffing  levels of sales and  administrative  personnel;  $934,000  (140.2%) of
increased costs for training and consulting fees for the  implementation  of the
Enterprise  Resource  Planning  system;  $900,000  (76.8%)  of  increased  legal
expenses;  $260,000  (16.1%) of increased  selling,  general and  administrative
expenses in the Company's Vicor Integration Architect subsidiaries, and $210,000
(5.6%) of increased advertising costs.

     Research  and  development   expenses   increased   $2,918,000  (16.5%)  to
$20,650,000,  and increased as a percentage of net revenues to 12.5% from 10.9%.
The principal  components of the $2,918,000  increase were $2,312,000 (21.6%) of
compensation  expense due to annual pay increases and growth in staffing  levels
of engineering  personnel,  primarily related to the research and development of
the  second-generation  product  line,  and  $539,000  (100.0%) of research  and
development costs associated with VJCL.

     Other  income  decreased  $92,000  (1.8%) to  $4,922,000.  Other  income is
primarily  comprised of interest income which was derived from invested cash and
cash  equivalents,  as well as a note  receivable  associated with the Company's
real estate  transaction.  Interest income decreased primarily due to a decrease
in cash and cash equivalents balances.

     Income  before  income  taxes was  $23,287,000,  a decrease of  $17,677,000
(43.2%) compared to 1997. As a percentage of net revenues,  income before income
taxes decreased from 25.2% in 1997 to 14.1% in 1998.

     The  provision  for income taxes  totaled  $7,452,000  in 1998  compared to
$14,747,000 in 1997. The Company's overall tax rate was 32.0% and 36.0% for 1998
and 1997,  respectively.  The decrease in the  effective tax rate was due to the
impact of expected tax credits in 1998 on a lower level of income  before income
taxes.

     Net  income  in 1998  decreased  by  $10,382,000  to  $15,835,000.  Diluted
earnings per share were $.37 in 1998 compared to $.60 in 1997.

LIQUIDITY AND CAPITAL RESOURCES

     At  December  31,  1999,  the  Company  had  $69,109,000  in cash  and cash
equivalents.  Working  capital  increased  $38,423,000  during  the  year  ended
December 31, 1999.  This  increase was due  primarily to an increase in cash and
cash  equivalents  of  $10,212,000,  an  increase  in  accounts  receivable  and
inventories of $7,545,000 and a decrease in amounts due for assets  acquired and
income taxes payable of $20,601,000.

     Cash used in investing  activities  during fiscal 1999 was  $15,693,000,  a
decrease of  $26,075,000  (62.4%)  compared to fiscal  1998.  This  decrease was
primarily  due to a decrease in net  additions  to  property  and  equipment  of
$21,565,000 and a reduced increase in other assets of $2,298,000.  Cash provided
by  financing  activities  was  $15,646,000  compared to cash used in  financing
activities of $15,349,000 in 1998, a net change of  $30,995,000.  This change is
primarily attributed to a net decrease in the acquisition cost of treasury stock
of $9,061,000 in 1999,  and an increase in the net proceeds from the issuance of
Common  Stock upon the  exercise of stock  options,  and the related  income tax
benefit derived from such issuance, of $21,934,000.


<PAGE>



     The Company plans to continue its investments in  manufacturing  equipment,
much of which is built  internally.  The internal  construction of manufacturing
machinery,  in order to provide  for  additional  manufacturing  capacity,  is a
practice which the Company expects to follow for the foreseeable future.

     In November  1997,  the Board of  Directors of the Company  authorized  the
repurchase  of  the  Company's  Common  Stock  up  to  an  aggregate  amount  of
$30,000,000,  including amounts remaining under a prior authorization.  The plan
authorizes  the Company to make such  repurchases  from time to time in the open
market or through privately negotiated transactions.  The timing of this program
and the  amount of the stock that may be  repurchased  is at the  discretion  of
management  based on its view of economic and financial  market  conditions.  In
1999, the Company spent $8,564,000 for the repurchase of its Common Stock.

     In February  2000,  the Board of  Directors of the Company  authorized  the
repurchase of the Company's Common Stock up to an additional aggregate amount of
approximately $30,000,000, under similar terms as noted above under the previous
repurchase program.

     The Company  believes that cash generated from  operations and its cash and
cash  equivalents  will be  sufficient  to fund planned  operations  and capital
equipment  purchases  for the  foreseeable  future.  At December 31,  1999,  the
Company had approximately $1,700,000 of capital expenditure commitments.

     The Company does not consider the impact of inflation  and changing  prices
on its business  activities or  fluctuations  in the exchange  rates for foreign
currency transactions to have been material during the last three fiscal years.

OTHER

     Shipments of second-generation products, which included the introduction of
the 300 and 375 Volt families of products,  increased during 1999  approximately
four-fold  over 1998.  Both  first and  second-generation  products  are sold to
similar  customers.  The Company  continues  to refine the  designs,  processes,
equipment and parts  associated  with  second-generation  products.  The Company
began depreciation on a significant portion of the  second-generation  automated
manufacturing line,  approximately $32.5 million, in the second quarter of 1998.
Depreciation  on another  $1.6 million of the line  commenced  during the second
half of 1998.  Approximately  $3.3 million of this line will be depreciated on a
straight-line basis over a period of five years, and approximately $30.8 million
will be  depreciated  on a  straight-line  basis  over a period of eight  years.
Additional  equipment  of  approximately  $6.4  million was placed into  service
during 1999.  While  production rates in the second half of 1999 were sufficient
to absorb this  depreciation  and other fixed and variable costs associated with
the  ramp-up of  production  of  second-generation  products,  gross  margins on
second-generation  products  currently  are  significantly  lower  than those of
current  generation  products.  Gross  margins  during 2000 will  continue to be
negatively  impacted until higher  production  volumes,  higher yield levels and
component cost reductions are attained.

IMPACT OF THE YEAR 2000

     In prior years, the Company  discussed the nature and progress of its plans
to become Year 2000 ready.  In late 1999, the Company  completed its remediation
and  testing  of  systems.  As a result  of those  planning  and  implementation
efforts, the Company experienced no significant  disruptions in mission critical
information technology and non-information technology systems and believes those
systems successfully  responded to the Year 2000 date change. The Company is not
aware of any material problems resulting from Year 2000 issues,  either with its
products,  its internal systems,  or the products and services of third parties.
However,  there can be no assurance that the Company's operations have not been,
or will not be,  affected  by Year 2000  issues in a manner  that has not become
apparent or that may arise in the future. Accordingly, the Company will continue
to monitor its mission critical computer applications and those of its suppliers
and vendors throughout the Year 2000 to ensure that any latent Year 2000 matters
that may arise are addressed promptly.


<PAGE>



ITEM 7(a) QUALITATIVE  AND QUANTITATIVE DISCLOSURE ABOUT MARKET RISK

     The Company is exposed to a variety of market risks,  including  changes in
interest  rates  affecting  the  return  on its cash and  cash  equivalents  and
fluctuations  in foreign  currency  exchange  rates.  The Company's  exposure to
market risk for a change in interest  rates  relates  primarily to the Company's
cash and cash equivalents.

     As the Company's  cash and cash  equivalents  consist  principally of money
market  securities,  which are short-term in nature,  the Company's  exposure to
market risk on interest  rate  fluctuations  is not  significant.  The Company's
exposure to market risk for  fluctuations  in foreign  currency  exchange  rates
relates  primarily to the  operations  of VJCL.  The Company  believes that this
market  risk is  currently  not  material  due to the  relative  size of  VJCL's
operations.


<PAGE>



ITEM 8 - FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

INDEX

FINANCIAL STATEMENTS

Report of Independent Auditors

Consolidated Balance Sheets at December 31, 1999 and 1998

Consolidated  Statements of Income For the Years Ended  December 31, 1999,  1998
and 1997

Consolidated  Statements  of Cash Flows For the Years Ended  December  31, 1999,
1998 and 1997

Consolidated Statements of Stockholders' Equity For the Years Ended December 31,
1999, 1998 and 1997

Notes to the Consolidated Financial Statements

Schedule (Refer to Item 14)


<PAGE>



                         REPORT OF INDEPENDENT AUDITORS

Board of Directors and Stockholders

VICOR CORPORATION

     We have  audited  the  accompanying  consolidated  balance  sheets of Vicor
Corporation  as of  December  31, 1999 and 1998,  and the  related  consolidated
statements of income, stockholders' equity, and cash flows for each of the three
years in the period  ended  December  31,  1999.  Our audits also  included  the
financial  statement schedule listed in the Index at Item 14(a). These financial
statements and schedule are the responsibility of the Company's management.  Our
responsibility  is to  express  an opinion  on these  financial  statements  and
schedule based on our audits.

     We conducted our audits in accordance  with  auditing  standards  generally
accepted in the United States.  Those standards require that we plan and perform
the audit to obtain reasonable  assurance about whether the financial statements
are free of material misstatement. An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial statements.  An
audit also includes  assessing the accounting  principles  used and  significant
estimates  made by  management,  as well as  evaluating  the  overall  financial
statement  presentation.  We believe that our audits provide a reasonable  basis
for our opinion.

     In our opinion,  the consolidated  financial  statements  referred to above
present fairly, in all material respects, the consolidated financial position of
Vicor Corporation at December 31, 1999 and 1998, and the consolidated results of
its  operations  and its cash  flows for each of the three  years in the  period
ended  December 31, 1999, in conformity  with  accounting  principles  generally
accepted in the United  States.  Also,  in our  opinion,  the related  financial
statement  schedule,   when  considered  in  relation  to  the  basic  financial
statements  taken as a whole,  presents  fairly  in all  material  respects  the
information set forth therein.

                                                         /s/Ernst & Young LLP

Boston, Massachusetts
January 26, 2000


<PAGE>


                                VICOR CORPORATION
                           CONSOLIDATED BALANCE SHEETS
                           December 31, 1999 and 1998

<TABLE>
<CAPTION>

                                                                                    1999                   1998
                                                                                    ----                   ----
                                                                                (in thousands, except share data)
                                     ASSETS

<S>                                                                              <C>                    <C>
Current assets:
     Cash and cash equivalents                                                    $  69,109           $  58,897
     Accounts receivable, less allowance of $853 in 1999 and
         $955 in 1998                                                                32,465              28,245
     Inventories, net                                                                33,360              29,470
     Other current assets                                                             6,940               5,071
                                                                                  ---------            --------

        Total current assets                                                        141,874             121,683

Property, plant and equipment, net                                                  109,079             111,074
Notes receivable                                                                      8,698               9,091
Other assets                                                                          9,254               7,703
                                                                                 ----------           ---------
                                                                                  $ 268,905           $ 249,551
                                                                                  =========           =========





                      LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
     Amounts due for assets acquired                                              $    --             $  16,000
     Accounts payable                                                                10,317               9,919
     Accrued compensation and benefits                                                3,553               2,010
     Accrued expenses                                                                 4,429               4,001
     Income taxes payable                                                               558               5,159
                                                                                    -------             -------
         Total current liabilities                                                   18,857              37,089


Deferred income taxes                                                                 5,515               3,203
Commitments and contingencies                                                             -                   -

Stockholders' equity:
     Preferred Stock, $.01 par value, 1,000,000 shares
         authorized; 360,001 issued and none outstanding in 1999 and 1998                 -                   -
     Class B Common Stock: 10 votes per share, $.01 par value, 14,000,000
          shares authorized, 12,067,007 issued and outstanding
         (12,103,309 in 1998)                                                           121                 121
     Common Stock: 1 vote per share, $.01 par value, 62,000,000 shares
         authorized, 35,597,623 shares issued and 30,369,965 outstanding
         (34,222,474 issued and 29,613,180 outstanding in 1998)                         356                 342
     Additional paid-in capital                                                     124,451             100,255
     Retained earnings                                                              185,979             166,891
     Accumulated other comprehensive income                                             889                 349
     Treasury stock at cost: 5,227,658 shares (4,609,294 shares in 1998)            (67,263)            (58,699)
                                                                                   --------           ---------
      Total stockholders' equity                                                    244,533             209,259
                                                                                   --------           ---------
                                                                                  $ 268,905           $ 249,551
                                                                                  =========           =========
</TABLE>

                                                        See accompanying notes


<PAGE>



                                VICOR CORPORATION
                        CONSOLIDATED STATEMENTS OF INCOME
                  Years ended December 31, 1999, 1998 and 1997
<TABLE>
<CAPTION>

                                                      1999           1998           1997
                                                      ----           ----           ----
                                                    (in thousands, except per share amounts)

<S>                                                <C>             <C>             <C>
Net revenues                                        $189,887        $164,634       $162,243
Costs and expenses:
     Cost of revenue                                 108,703          90,685         78,234
     Selling, general and administrative              36,831          34,934         30,327
     Research and development                         19,926          20,650         17,732
                                                    --------        --------        -------
                                                     165,460         146,269        126,293
                                                     -------         -------        -------

Income from operations                                24,427          18,365         35,950

Other income                                           3,439           4,922          5,014
                                                     -------         -------        -------


Income before income taxes                            27,866          23,287         40,964

Provision for income taxes                             8,778           7,452         14,747
                                                     -------         -------        -------



Net income                                          $ 19,088        $ 15,835       $ 26,217
                                                    ========        ========       ========


Net income per common share:

     Basic                                          $    .46        $    .37       $    .62
                                                    ========        ========       ========
     Diluted                                        $    .45        $    .37       $    .60
                                                    ========        ========       ========

Shares used to compute net income per share:

     Basic                                            41,568          42,292         42,595
                                                    ========        ========       ========
     Diluted                                          42,412          42,785         43,344
                                                    ========        ========       ========
</TABLE>

                                                        See accompanying notes


<PAGE>



                                VICOR CORPORATION
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                  Years ended December 31, 1999, 1998 and 1997

<TABLE>
<CAPTION>

                                                                        1999               1998              1997
                                                                        ----               ----              ----
                                                                                         (in thousands)
<S>                                                                   <C>               <C>                <C>
Operating activities:
     Net income                                                        $ 19,088          $ 15,835          $ 26,217
Adjustments to reconcile net income to net cash
    provided by operating activities:
         Depreciation and amortization                                   15,782            11,607             8,289
         (Gain) loss on disposal of equipment                               110               (23)              (10)
          Deferred income taxes                                             890               303              (201)
          Change in current assets and liabilities, net                 (25,745)            3,084            (8,159)
                                                                        -------           -------            -------

                  Net cash provided by operating activities              10,125            30,806            26,136

Investing activities:
     Additions to property, plant and equipment                         (14,827)          (36,392)          (20,177)
     Proceeds from sale of equipment                                         17                42                20
     Acquisition of business                                                 --            (1,850)                -
     Increase in other assets                                            (1,276)           (3,574)             (928)
                                                                         ------            ------            -------
                  Net cash used in investing activities                 (15,693)          (41,768)          (26,387)

Financing activities:
     Tax benefit relating to stock option plans                           6,148               718             2,950
     Proceeds from exercise of stock options                             18,062             1,558             9,196
     Acquisitions of treasury stock                                      (8,564)          (17,625)             (683)
                                                                         ------           -------            -------

                   Net cash provided by (used in)
                       financing activities                              15,646           (15,349)           11,463


Effect of foreign exchange rates on cash                                    134               349              --
                                                                         ------           -------            ------
Net increase (decrease) in cash and cash equivalents                     10,212           (25,962)           11,212

Cash and cash equivalents at beginning of year                           58,897            84,859            73,647
                                                                         ------            ------            ------

Cash and cash equivalents at end of year                               $ 69,109          $ 58,897          $ 84,859
                                                                       ========          ========          ========
</TABLE>

                           Continued on following page


<PAGE>





                                VICOR CORPORATION
                CONSOLIDATED STATEMENTS OF CASH FLOWS (Continued)
                  Years ended December 31, 1999, 1998 and 1997
<TABLE>
<CAPTION>

                                                                  1999               1998           1997
                                                                  ----               ----           ----
                                                                                (in thousands)
<S>                                                              <C>             <C>            <C>
Change in current assets and liabilities:
     Accounts receivable                                          $ (3,950)      $  7,013       $(10,257)
     Inventories                                                    (3,595)        (4,447)        (2,319)
     Other current assets                                             (374)          (754)          (159)
     Accounts payable and other accrued items                      (13,225)         1,243          3,566
     Income taxes payable                                           (4,601)            49          1,516
     Deferred revenue                                                   --            (20)          (506)
                                                                  ---------       --------      ---------
                                                                  $(25,745)       $ 3,084       $ (8,159)
                                                                  ========        =======       ========

Supplemental disclosures:
     Cash paid during the year for income taxes,                  $  5,777       $  5,568       $  9,520
     net of refunds

     Liabilities incurred related to acquisition                  $      -       $ 16,000       $      -
</TABLE>

                             See accompanying notes


<PAGE>



                                VICOR CORPORATION
                 CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
                  Years ended December 31, 1999, 1998 and 1997

                                 (in thousands)
<TABLE>
<CAPTION>


                                                                               Accumulated
                                     Class B            Additional               Other                       Total
                                     Common     Common   Paid-in    Retained  Comprehensive   Treasury    Stockholders'
                                      Stock      Stock   Capital    Earnings     Income        Stock        Equity
                                      -----      -----   -------    --------     ------        -----        ------
<S>                                   <C>       <C>     <C>         <C>         <C>          <C>           <C>
Balance at December 31, 1996           $123      $331    $85,842    $124,839     $-          $(40,391)    $170,744

Sales of Common Stock                               8      9,188                                             9,196
Conversion of Class B Common
Stock to Common Stock                    (1)        1                                                            -
Income tax benefit from
transactions involving stock options                       2,950                                             2,950
Purchase of treasury stock                                                                       (683)        (683)
Net income for 1997                                                   26,217                                26,217
                                   --------    ------     ------     -------    -----         --------     -------
Balance at December 31, 1997            122       340     97,980     151,056                  (41,074)     208,424

Sales of Common Stock                               1      1,557                                             1,558
Conversion of Class B Common
Stock to Common Stock                    (1)        1                                                            -
Income tax benefit from
transactions involving stock options                         718                                               718
Purchase of treasury stock                                                                    (17,625)     (17,625)

Net income for 1998                                                   15,835                                15,835
Currency translation adjustments                                                349                            349
                                                                                                            ------
Comprehensive income                                                                                        16,184
                                                                                                            ------

                                     ------     -----    -------     -------    ---           -------      -------
Balance at December 31, 1998            121       342    100,255     166,891    349           (58,699)     209,259


Sales of Common Stock                              14     18,048                                            18,062
Conversion of Class B Common
Stock to Common Stock                                                                                            -
Income tax benefit from
transactions involving stock options                       6,148                                             6,148
Purchase of treasury stock                                                                     (8,564)      (8,564)

Net income for 1999                                                   19,088                                19,088
Currency translation adjustments                                                540                            540
                                                                                                           -------
Comprehensive income                                                                                        19,628
                                                                                                            ------

                                       ----      ----   -------     --------  -----          --------     --------
Balance at December 31, 1999           $121      $356   $124,451    $185,979   $889          $(67,263)    $244,533
                                       ====      ====   ========    ========   ====          ========     ========
</TABLE>

                             See accompanying notes


<PAGE>



                                VICOR CORPORATION
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1.   SIGNIFICANT ACCOUNTING POLICIES

     DESCRIPTION OF BUSINESS
     Vicor  Corporation  (the "Company")  designs,  develops,  manufactures  and
markets modular power  converters,  power system  components,  and power systems
using a patented,  high frequency power conversion  technology  designated "zero
current  switching." The Company also licenses  certain rights to its technology
in return for ongoing royalties.  The principal markets for the power converters
and systems are large Original Equipment Manufacturers and smaller, lower volume
users which are broadly distributed across several major market areas.

     PRINCIPLES OF CONSOLIDATION
     The consolidated  financial  statements include the accounts of the Company
and its  subsidiaries.  All  intercompany  transactions  and balances  have been
eliminated upon consolidation.

     REVENUE RECOGNITION
     Revenue is recognized generally when a product is shipped. License fees are
recognized  ratably  over the period of  exclusivity  or as  additional  royalty
payments would have been required,  if greater,  or over the period in which the
Company provides  services.  Revenue from the long-term contract entered into in
1993 for the sale of automated manufacturing line equipment was recognized under
the  percentage of  completion  accounting  method  through the first quarter of
1998.  Revenues recognized from this contract were less than 10% of net revenues
in 1998 and 1997.

     FOREIGN CURRENCY TRANSLATION
     The financial statements of Vicor Japan Company,  Ltd. ("VJCL"),  for which
the  functional  currency is the Japanese  yen, have been  translated  into U.S.
dollars  in  accordance   with  FASB   Statement  No.  52,   "Foreign   Currency
Translation". All balance sheet accounts have been translated using the exchange
rate in effect at the balance  sheet date.  Income  statement  amounts have been
translated at the average  exchange  rates in effect during the year.  The gains
and losses  resulting  from the changes in exchange rates from year to year have
been reported in other  comprehensive  income.  The effect on the  statements of
income of transaction gains and losses is insignificant for all years presented.

     CASH AND CASH EQUIVALENTS
     Cash and cash  equivalents  include funds held in checking and money market
accounts  with  banks,  and  certificates  of deposit and debt  securities  with
maturities of less than three months when purchased.  Cash and cash  equivalents
are valued at cost which  approximates  market value.  The Company's  short-term
investments,  which are  classified as cash  equivalents  on the balance  sheet,
consist  principally of money market securities which are purchased and redeemed
at par. The estimated  fair value is equal to the cost of the securities and due
to the nature of the securities  there are no unrealized  gains or losses at the
balance sheet dates. As of December 31, 1999, the Company has  approximately $58
million of available-for-sale  securities ($54 million as of December 31, 1998).
The Company has no trading securities or held-to-maturity securities.

     CONCENTRATIONS OF CREDIT RISK
     Financial  instruments that potentially  subject the Company to significant
concentrations  of credit risk consist  principally of cash and cash  equivalent
investments and trade accounts  receivable.  The Company maintains cash and cash
equivalents  and certain  other  financial  instruments  with various  financial
institutions.  Concentrations  of credit  risk with  respect  to trade  accounts
receivable  are  limited  due to the large  number of  entities  comprising  the
Company's   customer  base.   Credit  losses  have   consistently   been  within
management's expectations and have not been material.


<PAGE>



                                VICOR CORPORATION
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

1.       SIGNIFICANT ACCOUNTING POLICIES (Continued)

     INTANGIBLE ASSETS
     Intangible  assets,   which  are  included  in  the  other  assets  in  the
accompanying balance sheets, consist primarily of values assigned to patents and
to the excess of cost over the assigned value of net assets acquired. Intangible
assets are amortized  using the  straight-line  method over periods ranging from
five to fifteen years. Amortization expense was approximately $929,000, $536,000
and $301,000 in 1999, 1998 and 1997, respectively.  Accumulated amortization was
$1,924,000 at December 31, 1999 and $1,030,000 at December 31, 1998.

     Long-lived  assets,  such as  these  intangible  assets,  are  included  in
impairment  evaluations  when events or  circumstances  exist that  indicate the
carrying  amount  of those  assets  may not be  recoverable.  If the  impairment
evaluation indicates the affected asset is not recoverable, the asset's carrying
value would be reduced to fair value.  No event has  occurred  that would impair
the  value  of  long-lived  assets  recorded  in the  accompanying  consolidated
financial statements.

     ADVERTISING EXPENSE

     The cost of  advertising  is expensed  as  incurred.  The Company  incurred
$2,189,000,  $3,197,000,  and $3,372,000 in advertising  costs during 1999, 1998
and 1997, respectively.

     NET INCOME PER COMMON SHARE
     Basic and diluted income per share are  calculated in accordance  with FASB
Statement  No. 128,  "Earnings  per Share." All income per share amounts for all
periods have been presented,  and where appropriate,  restated to conform to the
Statement No. 128 requirements.

     USE OF ESTIMATES
     The  preparation of the financial  statements in conformity  with generally
accepted  accounting  principles  requires  management  to  make  estimates  and
assumptions  that affect the amounts  reported in the financial  statements  and
accompanying notes. Actual results could differ from those estimates.

     COMPREHENSIVE INCOME
     The Company reports  comprehensive income in accordance with FASB Statement
No. 130,  "Reporting  Comprehensive  Income."  Statement  No. 130  requires  the
foreign currency translation adjustments related to VJCL to be included in other
comprehensive income.

     IMPACT OF RECENTLY ISSUED ACCOUNTING STANDARDS
     In June 1998, the Financial  Accounting Standards Board issued Statement of
Financial  Accounting  Standards No. 133, (FAS 133),  "Accounting for Derivative
Instruments  and  Hedging  Activities",   which  required  adoption  in  periods
beginning after June 15, 1999. FAS 133 was subsequently  amended by Statement of
Financial Accounting  Standards No. 137, "Accounting for Derivative  Instruments
and Hedging  Activities - Deferral of the Effective  Date of FASB  Statement No.
133" and will now be effective for fiscal years  beginning  after June 15, 2000,
with earlier adoption permitted.  The Company will adopt FAS 133 on a cumulative
basis during fiscal 2001, as required.  The Company is currently  evaluating the
effect of adopting FAS 133 and has not  determined  the impact of FAS 133 on its
financial  statements.  In December 1999, the Securities and Exchange Commission
issued  Staff  Accounting  Bulletin  101,  (SAB 101),  "Revenue  Recognition  in
Financial  Statements." SAB 101 summarizes the application of generally accepted
accounting  principles  to revenue  recognition  in  financial  statements.  The
Company  does not  expect  SAB 101 to have a  material  effect on its  financial
position or results of operations.


<PAGE>


                                VICOR CORPORATION
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)


2.       ACQUISITION

     Effective July 1, 1998, the Company and its  wholly-owned  subsidiary  VJCL
acquired the principal assets of the switching power supply  businesses owned by
the Japan Tobacco,  Inc. Group ("JT").  The assets acquired  included  automated
manufacturing  equipment,  existing raw material and finished goods inventories,
customer  lists and certain  intellectual  property.  VJCL also assumed  certain
warranty  obligations  for products  manufactured by JT prior to the acquisition
date and for a six  month  transition  period  ending  December  31,  1998.  The
acquisition  was  accounted  for by the  purchase  method.  The  total  value of
consideration  given  and  liabilities  assumed  aggregated  $19.1  million.  In
addition to cash  payments for  inventories,  the Company paid for the automated
equipment in three equal  installments  of $5.3  million,  through  December 31,
1999.  The total cost of the  purchase  in excess of the net assets  acquired of
approximately  $3.2 million,  including  final purchase  accounting  adjustments
recorded during 1999, is being amortized over ten years.

     The following unaudited pro forma financial information for the years ended
December  31, 1998 and 1997  assumes the  acquisition  occurred as of January 1,
1998 and 1997, respectively (in thousands, except per share amounts):

                                                    1998        1997
                                                    ----        ----
Net revenues                                     $173,421      $179,816
Net income                                       $ 14,216      $ 22,980
Net income per share-diluted                        $0.33         $0.53

     The pro forma financial  information is not  necessarily  indicative of the
operating results that would have occurred had the acquisition been completed as
of January 1, 1998 and 1997,  respectively,  nor are they necessarily indicative
of future operating results.

3.   INVENTORIES

     Inventories are valued at the lower of cost (determined using the first-in,
first-out method) or market. Inventories were as follows (in thousands):

                                                             December 31
                                                             -----------
                                                       1999               1998
                                                       ----               ----
     Raw materials                                  $22,924            $19,084
     Work-in-process                                  4,957              4,334
     Finished goods                                   5,479              6,052
                                                    -------            -------
                                                    $33,360            $29,470
                                                    =======            =======

<PAGE>


                               VICOR CORPORATION
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

4.       PROPERTY, PLANT AND EQUIPMENT

     Property,  plant and equipment are stated at cost and are  depreciated  and
amortized  over a period of 3 to 31.5 years  generally  under the  straight-line
method for financial  reporting purposes and accelerated  methods for income tax
purposes. Property, plant and equipment were as follows (in thousands):

<TABLE>
<CAPTION>

                                                             December 31
                                                             -----------
                                                          1999        1998
                                                          ----        ----
     <S>                                              <C>           <C>
     Land                                             $  2,089    $  2,089
     Buildings and improvements                         36,321      24,370
     Machinery and equipment                           122,749     107,329
     Furniture and fixtures                              4,708       4,725
     Leasehold improvements                              2,418       3,151
     Construction-in-progress                            7,625      19,053
     Building construction-in-progress                       -      10,616
                                                      --------     -------
                                                       175,910     171,333
     Less accumulated depreciation and amortization     66,831      60,259
                                                      --------    --------
                                                      $109,079    $111,074
                                                      ========    ========
</TABLE>

     At December 31, 1999, the Company had  approximately  $1,700,000 of capital
expenditure commitments.

5.   NOTES RECEIVABLE

     In May 1997,  the  Company  received  a  promissory  note in the  amount of
$7,500,000 from an unrelated third party in exchange for $5,000,000 in cash plus
the termination of an existing note in the amount of $2,500,000.  The note bears
interest  at 9% and is due in May 2002.  The note is secured  by a  mortgage  on
certain real estate and by the assignment of certain leases and other contracts.

     The Company's President has borrowed a total of $1,525,393 from the Company
pursuant to a series of unsecured term notes, of which $356,000 plus interest of
$294,000 was paid during 1999. The notes have terms of five years and are due at
various  dates  through June 2004.  The notes bear interest at the higher of the
Company's prime borrowing rate less 1%, or the applicable federal rate under the
Internal  Revenue Code of 1986, as amended.  As of December 31, 1999,  the notes
and interest receivable balance was approximately  $1,302,000  ($1,724,000 as of
December 31,  1998) and the  applicable  interest  rate at December 31, 1999 was
7.50% (6.75% at December 31, 1998).

6.   FINANCING ARRANGEMENTS

     The  Company  had an unused  line of  credit  with a bank  under  which the
Company could borrow up to $4,000,000  on a revolving  credit basis.  Borrowings
under this line would bear interest at the Company's  option of an interest rate
equal to the  Lender's  base rate,  30 day LIBOR + 1.75% or the 30 day  Banker's
Acceptance  (BA) rate + 2.25%.  This line of credit  was  terminated  in January
2000.

7.       STOCKHOLDERS' EQUITY

     In November  1997,  the Board of  Directors of the Company  authorized  the
repurchase  of  the  Company's  Common  Stock  up  to  an  aggregate  amount  of
approximately   $30,000,000,   including   amounts   remaining   under  a  prior
authorization.  The plan  authorizes the Company to make such  repurchases  from
time to time in the open market or through  privately  negotiated  transactions.
The timing of this  program and the amount of the stock that may be  repurchased
is at the  discretion of management  based on its view of economic and financial
market  conditions.  In 1999, the Company spent  $8,564,000 in the repurchase of
its Common Stock.


<PAGE>


                                VICOR CORPORATION
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

7.       STOCKHOLDERS' EQUITY (Continued)

     Common Stock

     Each share of Common Stock  entitles the holder  thereof to one vote on all
matters  submitted  to the  shareholders.  Each  share of  Class B Common  Stock
entitles the holder thereof to ten votes on all such matters.

     Shares of Class B Common Stock are not transferable by stockholders  except
to or among such stockholder's spouse, certain of such stockholder's  relatives,
and certain  other  defined  transferees.  Class B Common Stock is not listed or
traded on any exchange or in any market.  Class B Common Stock is convertible at
the option of the holder thereof at any time and without cost to the shareholder
into shares of Common Stock on a share-for-share basis.

     During 1999,  a total of 1,338,847  shares of Common Stock were issued upon
the exercise of stock  options,  and 36,302  shares of Class B Common Stock were
converted into 36,302 shares of Common Stock.

8.   INCOME PER SHARE

     The following  table sets forth the computation of basic and diluted income
per share (in thousands, except per share amounts):

<TABLE>
<CAPTION>

                                                                1999                1998               1997
                                                                ----                ----               ----
<S>                                                           <C>                  <C>                <C>
Numerator:
    Net income                                                 $19,088             $15,835             $26,217
                                                               =======             =======             =======

Denominator:
    Denominator for basic income per share -
    weighted average shares                                     41,568              42,292              42,595

    Effect of dilutive securities:
        Employee stock options                                     844                 493                 749
                                                                ------               -----               -----

    Denominator for diluted income per share -
    adjusted weighted-average shares and
    assumed conversions                                         42,412              42,785              43,344
                                                                ======              ======              ======

Basic income per share                                         $   .46             $   .37             $   .62
                                                               =======             =======             =======

Diluted income per share                                       $   .45             $   .37             $   .60
                                                               =======             =======             =======
</TABLE>

     There were no options to purchase shares of Common Stock outstanding during
1999 that were not  included  in the  computation  of diluted  income per share.
During 1998 and 1997,  663,587 and 20,615 shares of Common Stock,  respectively,
were  outstanding but were not included in the computation of diluted income per
share because the options'  exercise prices were greater than the average market
price  of  the  Common  Stock  and,  therefore,   the  effect  would  have  been
antidilutive.

9.   EMPLOYEE BENEFIT PLANS

     Stock Options

     The Company has elected to follow  Accounting  Principles Board Opinion No.
25,   "Accounting   for  Stock  Issued  to  Employees"   (APB  25)  and  related
Interpretations  in  accounting  for its  employee  stock  options  because,  as
discussed below,  the alternative fair value accounting  provided for under FASB
Statement No. 123,  "Accounting for Stock-Based  Compensation,"  requires use of
option valuation models that were not developed


<PAGE>



                                VICOR CORPORATION
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)


9.   EMPLOYEE BENEFIT PLANS (Continued)

for use in valuing  employee stock  options.  Under APB 25, because the exercise
price of the Company's  employee  stock  options  equals the market price of the
underlying stock on the date of grant, no compensation expense is recognized.

     Under the Company's 1998 Stock Option and Incentive Plan (the "1998 Plan"),
the Board of Directors or the  Compensation  Committee  may grant  certain stock
incentive awards based on the Company's  Common Stock,  including stock options,
stock appreciation rights,  restricted stock,  performance shares,  unrestricted
stock,  deferred stock and dividend equivalent rights.  Awards may be granted to
employees and other key persons,  including  non-employee  directors.  Incentive
stock  options may be granted to employees at a price at least equal to the fair
market  value  per  share  of  the  Common  Stock  on the  date  of  grant,  and
non-qualified  options may be granted to  non-employee  directors  at a price at
least equal to 85% of the fair market  value of the Common  Stock on the date of
grant.  A total of  2,000,000  shares of Common  Stock  have been  reserved  for
issuance  under the 1998 Plan.  The period of time during which an option may be
exercised  and the  vesting  periods  will  be  determined  by the  Compensation
Committee.  The term of each  option  may not  exceed ten years from the date of
grant. As of December 31, 1999, no stock incentive awards were granted under the
1998 Plan.


     Under the 1993 Stock Option Plan (the "1993 Plan"),  the Board of Directors
or  the  Compensation  Committee  may  grant  stock  options  to  employees  and
non-employee  directors  to purchase  shares of Common Stock at a price at least
equal to the fair market value per share of the outstanding  Common Stock at the
time the option is granted.  Both  incentive  stock options  intended to qualify
under Section 422 of the Internal Revenue Code and  non-qualified  stock options
have been  authorized to be granted.  Incentive  stock options may be granted to
employees,   including   employees  who  are  directors  of  the  Company,   and
non-qualified  options may be granted to non-employee  directors.  Both employee
directors and non-employee  directors  automatically  receive stock options upon
election or  re-election  as a director.  A total of 4,000,000  shares of Common
Stock have been  reserved for issuance  under the 1993 Plan.  Stock  options are
typically  granted  with  vesting  periods and become  exercisable  over various
periods of time,  ranging  from six months to five years from the date of grant,
and expire over various periods of time,  ranging from one to ten years from the
date of grant.

     Under the  Company's  1984 Stock Option Plan, as amended (the "1984 Plan"),
the Board of Directors or the  Compensation  Committee  granted stock options to
employees  to purchase  shares of Common  Stock at a price at least equal to the
fair  market  value per share of the  outstanding  Common  Stock at the time the
option was granted.  Stock  options under the 1984 Plan were  typically  granted
with  vesting  periods  and became  exercisable  over  various  periods of time,
ranging  from six months to five years from the date of grant,  and expire  over
various  periods of time,  ranging  from one to thirteen  years from the date of
grant.  In connection with the adoption of the 1993 Plan, the Board of Directors
terminated the granting of options under the 1984 Plan upon approval of the 1993
Plan, discussed above.


<PAGE>



                                VICOR CORPORATION
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)


9.   EMPLOYEE BENEFIT PLANS (Continued)

Activity as to stock options is as follows:

<TABLE>
<CAPTION>

                                                      1999            1998            1997
                                                      ----            ----            ----

     <S>                                          <C>              <C>               <C>
     Outstanding at beginning of year              2,624,657        2,197,852        2,022,005
         Granted                                   1,865,943          841,934        1,106,302
         Forfeited and expired                      (376,874)        (221,297)        (197,448)
         Exercised                                (1,338,847)        (193,832)        (733,007)
                                                  ----------         --------         --------

     Outstanding at end of year                    2,774,879        2,624,657        2,197,852
                                                   =========        =========        =========

     Exercisable at end of year                    1,204,361        1,650,164        1,336,125
                                                   =========        =========        =========

     Weighted - average exercise price:

         Outstanding at beginning of year             $15.30           $11.15           $ 8.97
         Granted                                      $12.40           $25.72           $16.92
Forfeited and expired                                 $16.95           $21.05           $15.49
Exercised                                             $13.49           $ 8.10           $12.55
Outstanding at end of year                            $14.00           $15.30           $11.15
Exercisable at end of year                            $11.53           $12.33           $ 7.60

Weighted - average fair value of
    options granted during the year              $      4.97      $     13.71       $     6.74
Price range per share of outstanding options     $1.00-31.56      $ .84-31.13       $.84-30.19
                                                 ===========      ===========      ===========
Price range per share of options granted         $9.13-31.56      $8.06-28.50     $13.38-30.19
                                                 ===========      ===========     ============
Price range per share of options exercised       $ .84-31.13      $8.00-29.56     $ 1.00-24.38
                                                 ===========      ===========     ============

Available for grant at end of year                   976,639        2,468,312        1,088,996
                                                     =======        =========        =========
</TABLE>


The weighted - average  contractual life for options  outstanding as of December
31, 1999 is 6.60 years.

      The following table summarizes information about stock options outstanding
as of December 31, 1999:

<TABLE>
<CAPTION>

                                                                Range of Exercise Prices
                                                                ------------------------

                             $1.00-$11.13       $11.25-$12.06      $12.25-$28.25     $28.44-$31.56
                             ------------       -------------      -------------     -------------
<S>                              <C>               <C>               <C>               <C>
Options Outstanding:
- --------------------
Number Outstanding                678,174           1,018,402          1,047,345            30,958
Weighted-Average Remaining
Contractual Life                     3.32                8.49               6.82              8.48
Weighted-Average
Exercise Price                      $4.97              $12.05             $21.27            $29.85

Options Exercisable:
- --------------------
Number Exercisable                586,871             186,645            422,627             8,218
Weighted-Average
Exercise Price                      $4.16              $12.00             $21.20            $29.95
</TABLE>


<PAGE>



                                VICOR CORPORATION
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

9.   EMPLOYEE BENEFIT PLANS (Continued)

     Pro forma  information  regarding  net  income  and  earnings  per share is
required by Statement  No. 123,  which also  requires  that the  information  be
determined  as if the Company  had  accounted  for its  employee  stock  options
granted subsequent to December 31, 1994 under the fair value method described in
that  Statement.  The fair value for these  options was estimated at the date of
grant  using  a   Black-Scholes   option   pricing   model  with  the  following
weighted-average  assumptions for 1999, 1998 and 1997,  respectively:  risk-free
interest  rates of 5.4%,  5.3% and 6.1%;  dividend  yields  of zero;  volatility
factor of the expected  market price of the  Company's  common stock of .55, .55
and .52; and a weighted-average  expected life of the option of 3.3, 3.4 and 3.3
years.

     The  Black-Scholes   option  valuation  model  was  developed  for  use  in
estimating the fair value of traded  options which have no vesting  restrictions
and are fully  transferable.  In addition,  option  valuation models require the
input of highly  subjective  assumptions  including  the  expected  stock  price
volatility.  Because the Company's  employee stock options have  characteristics
significantly different from those of traded options, and because changes in the
subjective input assumptions can materially  affect the fair value estimate,  in
management's  opinion, the existing models do not necessarily provide a reliable
single measure of the fair value of its employee stock options.

     For  purposes of pro forma  disclosures,  the  estimated  fair value of the
options is amortized to expense over the options' vesting period.  The Company's
pro forma  information  follows  (in  thousands  except for  earnings  per share
information):

<TABLE>
<CAPTION>

                                       1999       1998      1997
                                       ----       ----      ----
<S>                                    <C>        <C>       <C>
Pro forma net income                  $15,811    $12,964   $23,947
Pro forma net income per share:
Basic                                 $   .38    $   .31   $   .56
Diluted                               $   .38    $   .30   $   .55
</TABLE>

     The effects on 1999,  1998 and 1997 pro forma net income and net income per
share of expensing  the fair value of stock options  issued are not  necessarily
representative  of the effects on reporting  the pro forma results of operations
for future  years as the periods  presented  include  only five,  four and three
years, respectively, of option grants under the Company's plans.

     401(k) Plan

     The Company  sponsors a savings plan  available  to all domestic  employees
which qualifies under Section 401(k) of the Internal Revenue Code. Employees may
contribute  to the  plan  from 1% to 20% of  their  pre-tax  salary  subject  to
statutory limitations. The Company does not make contributions to this plan.

     Stock Bonus Plan

     Under the  Company's  1985 Stock Bonus Plan,  as amended,  shares of Common
Stock may be awarded to employees  from time to time as  determined by the Board
of Directors.  At December 31, 1999,  109,964  shares were available for further
award.  All shares awarded to employees under this plan have vested.  No further
awards are contemplated under this plan at present.


<PAGE>



                                VICOR CORPORATION
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)


10.      INCOME TAXES

     Deferred income taxes reflect the net tax effects of temporary  differences
between the carrying  amounts of assets and liabilities for financial  reporting
purposes and the amounts used for income tax purposes. Significant components of
the Company's deferred tax liabilities and assets are as follows (in thousands):

<TABLE>
<CAPTION>

                                                             December 31
                                                             -----------
                                                         1999              1998
                                                         ----              ----
<S>                                                     <C>              <C>
Deferred tax assets:
    Inventory reserves                                  $ 1,762         $ 1,418
    Investment tax credit carry forward                   1,450             500
    Vacation                                                840             665
    Bad debt                                                351             393
    Other                                                   406             411
                                                         ------          ------

         Total deferred tax assets (current)              4,809           3,387
Deferred tax liabilities:
    Depreciation                                         (3,878)         (1,819)
    Patent amortization                                  (1,637)         (1,384)
                                                         ------          ------
         Total deferred tax liabilities (noncurrent)     (5,515)         (3,203)
                                                         ------          ------
         Net deferred tax assets (liabilities)          $  (706)        $   184
                                                        =======         =======
</TABLE>

     Significant components of the provision for income taxes are as follows (in
thousands):

<TABLE>
<CAPTION>

                               1999             1998          1997
                               ----             ----          ----
<S>                         <C>              <C>           <C>
Federal:
    Current                 $  7,073        $  6,573     $ 12,877
    Deferred (prepaid)           890             303         (201)
                              ------          ------        ------
                               7,963           6,876        12,676
State:
    Current                      815             576         2,071
                            --------        --------      --------
                            $  8,778        $  7,452      $ 14,747
                            ========        ========      ========
</TABLE>

     The  reconciliation  of the federal  statutory rate to the effective income
tax rate is as follows:

<TABLE>
<CAPTION>

                                                          1999     1998     1997
                                                          ----     ----     ----
<S>                                                      <C>       <C>     <C>
Statutory federal tax rate                                35.0%    35.0%   35.0%
State income taxes, net of federal income tax benefit      1.9      1.6     3.3
Tax credits                                               (3.6)    (4.7)   (0.8)
Foreign Sales Corporation benefit                         (0.6)    (1.1)   (1.5)
Other                                                     (1.2)     1.2       -
                                                          ----     ----    ----
                                                          31.5%    32.0%   36.0%
                                                          =====    =====   =====
</TABLE>

The investment tax credit carry forwards expire through 2002.


<PAGE>



                                VICOR CORPORATION
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)


11.  COMMITMENTS AND CONTINGENCIES

     The Company leases  certain of its office,  warehousing  and  manufacturing
space, as well as certain equipment. The future minimum rental commitments under
noncancelable operating leases with remaining terms in excess of one year are as
follows (in thousands):

Year
- ----
2000   $731
2001    387
2002    264
2003     73
2004     20

     Rent expense was approximately  $1,146,000,  $1,534,000,  and $1,383,000 in
1999, 1998 and 1997, respectively. The Company also pays executory costs such as
taxes, maintenance and insurance.

     The Company is involved in certain litigation  incidental to the conduct of
its  business.  While the  outcome of lawsuits  against  the  Company  cannot be
predicted with certainty,  management does not expect any current  litigation to
have a material adverse effect on the Company.

12.  SEGMENT INFORMATION

     The Company operates in one industry segment: the development,  manufacture
and sale of power conversion components and systems. During 1999, 1998 and 1997,
no  customer  constituted  more than 10% of net  revenues.  Export  sales,  as a
percentage of total revenue,  were approximately 30%, 29%, and 31% in 1999, 1998
and 1997,  respectively.  Export sales and receipts are recorded and received in
U.S.  dollars.  Foreign  exchange  fluctuations  have not been  material  to the
Company's operating results during the last three years.

13.      LICENSE AGREEMENT AND LITIGATION SETTLEMENT

     On February 1, 1999, the Company and Reltec Corporation  ("Reltec") entered
into a license agreement under which Reltec acquired a non-exclusive,  worldwide
license to use Vicor's patented "reset"  technology.  Concurrently,  the Company
and Reltec  agreed to settle all pending  litigation  and  disputes  relating to
Reltec's past use of certain Vicor intellectual  property.  In consideration for
the  license  and the  separate  settlement  of the  litigation,  Reltec  made a
one-time  payment of $22.5  million into an escrow  fund.  Vicor is obligated to
make  know-how and technical  support  available to Reltec under the license and
will receive and recognize income from the escrow fund into the year 2001.


<PAGE>


                                VICOR CORPORATION
              NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(Continued)


14.  QUARTERLY RESULTS OF OPERATIONS (Unaudited)

     The following table sets forth certain unaudited  quarterly  financial data
(in thousands, except per share amounts):

<TABLE>
<CAPTION>

                                          First      Second      Third       Fourth     Total
                                          -----      ------      -----       ------     -----
<S>                                     <C>          <C>        <C>         <C>        <C>
1999:    Net revenues                   $41,964      $44,808    $ 49,373     $53,742   $189,887
         Gross profit                    18,688       18,801      21,371      22,324     81,184
         Net income                       3,665        4,168       5,558       5,697     19,088
         Net income per share:
         Basic                              .09          .10         .13         .14        .46
         Diluted                            .09          .10         .13         .13        .45

</TABLE>

<TABLE>
<CAPTION>

                                          First      Second      Third       Fourth     Total
                                          -----      ------      -----       ------     -----
<S>                                     <C>          <C>        <C>         <C>        <C>
1998:    Net revenues                   $43,192      $41,718     $39,318     $40,406   $164,634
         Gross profit                    20,747       18,840      17,233      17,129     73,949
         Net income                       5,415        4,155       3,042       3,223     15,835
         Net income per share:
         Basic                              .13          .10         .07         .08        .37
         Diluted                            .12          .10         .07         .08        .37
</TABLE>


<PAGE>


PART III

     ITEM 9 - CHANGES IN AND  DISAGREEMENTS  WITH  ACCOUNTANTS ON ACCOUNTING AND
              FINANCIAL DISCLOSURE

     None.

ITEM 10 - DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

     Incorporated by reference from the Company's Definitive Proxy Statement for
its 2000 annual meeting of stockholders.

ITEM 11 - EXECUTIVE COMPENSATION

     Incorporated by reference from the Company's Definitive Proxy Statement for
its 2000 annual meeting of stockholders.

ITEM 12 - SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

     Incorporated by reference from the Company's Definitive Proxy Statement for
its 2000 annual meeting of stockholders.

ITEM 13 - CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

     Incorporated by reference from the Company's Definitive Proxy Statement for
its 2000 annual meeting of stockholders.

ITEM 14 - FINANCIAL STATEMENTS, SCHEDULES, EXHIBITS, AND REPORTS ON FORM 8-K

(a) (1) Financial Statements

     See index in Item 8

(a)      (2) Schedules

     Schedule II Valuation and Qualifying Accounts

     All  other  schedules  for  which  provision  is  made  in  the  applicable
accounting regulation of the Securities and Exchange Commission are not required
under the related  instructions  or are  inapplicable,  and therefore  have been
omitted.

(a) (3) EXHIBITS

     Exhibits     Description of Document

        3.1     o Restated Certificate of Incorporation(1)
        3.2     o Bylaws, as amended(1)
        4.1     o Specimen Common Stock Certificate(1)
       10.1     o 1984 Stock Option Plan of the Company, as amended(1)
       10.2     o Military/Aerospace  License Agreement dated as of March 1,
                  1985, by and between the Company and Kollmorgen Corporation(1)
       10.3     o Western Europe License Agreement dated as of March 1, 1985, by
                  and between the Company and Kollmorgen Corporation(1)
       10.4     o Switching Power Supply Patents and Know-How Agreement dated as
                  of December 2, 1986, by and between the Company and Reliance
                  Electric Company(1)

<PAGE>



     ITEM 14 - FINANCIAL STATEMENTS,  SCHEDULES,  EXHIBITS,  AND REPORTS ON FORM
               8-K (continued)

       10.5       o Switching  Power  Supply  Patent and  Information  Agreement
                  dated as of June 29, 1988, by and between VLT  Corporation and
                  Integran, Inc.(1)

       10.6     o Vicor Corporation Employee Stock Bonus Plan(1)
       10.7     o Vicor Corporation 401(k) Plan(1)
       10.8     o Amendment to Switching Power Supply Patents and Know-How
                  Agreement  dated as of May 17, 1990, by and among the Company,
                  VLT Corporation and Reliance Comm/Tec Corporation(2)

       10.9     o $1,500,000 Promissory Note (Lot 3) to Vicor Corporation from
                  Andover Park Realty Trust dated September 14, 1992(3)
       10.10    o $1,500,000 Promissory Note (Lot 2) to Vicor Corporation from
                  Andover Park Realty Trust dated September 14, 1992(3)
       10.11    o $1,000,000 Promissory Note (Lot 6A) to Vicor Corporation from
                  Andover Park Realty Trust dated September 14, 1992(3)
       10.12    o Mortgage and Security Agreement (Lot 6A) to Vicor Corporation
                  from Andover Park Realty Trust dated September 14, 1992(3)
       10.13    o 1993 Stock Option Plan(4)
       10.14    o $7,500,000 Promissory Note to Vicor Corporation from Andover
                  Park Realty Trust dated May 29, 1997(5)
       10.15    o Loan Agreement between Vicor Corporation and Andover Park
                  Realty Trust dated May 29, 1997(5)
       10.16    o Mortgage and Security Agreement to Vicor Corporation from
                  Andover Park Realty Trust dated May 29, 1997(5)
       10.17    o 1998 Stock Option and Incentive Plan(6)
       21.1     o Subsidiaries of the Company(7)
       23.1     o Consent of Independent Auditors(7)
       27.1     o Financial Data Schedule for 1999(7)

              (1) Filed as an exhibit to the Company's Registration Statement on
                  Form 10, as amended, under the Securities Exchange Act of 1934
                  (File No. 0-18277), and incorporated herein by reference.

              (2) Filed as an exhibit  to the  Company's  Annual  Report on Form
                  10-K  for  the  fiscal  year  ended   December  31,  1990  and
                  incorporated herein by reference.

              (3) Filed as an exhibit to the  Company's  Current  Report on Form
                  8-K  dated  September  14,  1992 and  incorporated  herein  by
                  reference.

              (4) Filed as an exhibit to the Company's Registration Statement on
                  Form S-8, as amended, under the Securities Act of 1933
                  (No. 33-65154), and incorporated herein by reference.
              (5) Filed as an exhibit to the Company's  Form 10-Q dated June 30,
                  1997 and incorporated herein by reference.

              (6) Filed as an exhibit to the Company's Registration Statement on
                  Form S-8, as amended, under the Securities Act of 1933
                  (No. 333-61177), and incorporated herein by reference.
              (7) Filed herewith

(b) REPORTS ON FORM 8-K
      None


<PAGE>




                                VICOR CORPORATION

                                   SCHEDULE II

                        Valuation and Qualifying Accounts
                  Years ended December 31, 1999, 1998 and 1997

<TABLE>
<CAPTION>

                                                            (Credit)
                                     Balance at             Charge to            Other               Balance at
                                     Beginning              Costs and           Changes                  End
                                     Of Period              Expenses            Deductions (1)        Of Period
                                     ---------              --------            --------------        ---------
<S>                                 <C>                     <C>                 <C>                   <C>
1999

Allowance for doubtful

     accounts                        $955,000               $28,000             ($130,000)             $853,000

1998

Allowance for doubtful

     accounts                        $971,000               $11,000              ($27,000)             $955,000

1997

Allowance for doubtful

     accounts                        $879,000                $5,000               $87,000              $971,000

</TABLE>

(1)  Reflects uncollectible accounts written off, net of recoveries.



<PAGE>


                                   SIGNATURES

     Pursuant  to the  requirements  of  Section  13 or 15(d) of the  Securities
Exchange Act of 1934, the Registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized.

Dated: March 28, 2000                                Vicor Corporation

                                                 By: /s/Mark A. Glazer
                                                 ---------------------
                                                     Mark A. Glazer
                                                     Chief Financial Officer



     Pursuant to the  requirements of the Securities  Exchange Act of 1934, this
report  has  been  signed  below  by the  following  persons  on  behalf  of the
registrant in the capacities and on the dates indicated.

Signature                       Title                              Date


/s/Patrizio Vinciarelli         President and Chairman         March 28, 2000
- -----------------------         of the Board (Principal
Patrizio Vinciarelli            Executive Officer)



/s/Mark A. Glazer               Chief Financial Officer        March 28, 2000
- -----------------              (Principal Financial Officer)
Mark A. Glazer


/s/Estia J. Eichten             Director                       March 28, 2000
- -------------------
Estia J. Eichten

/s/David T. Riddiford           Director                       March 28, 2000
- ---------------------
David T. Riddiford

/s/Jay M. Prager                Director                       March 28, 2000
- ----------------
Jay M. Prager

/s/Barry Kelleher               Director                       March 28, 2000
- -----------------
Barry Kelleher

/s/M. Michael Ansour            Director                       March 28, 2000
- --------------------
M. Michael Ansour




Exhibit 21.1

                           SUBSIDIARIES OF THE COMPANY

<TABLE>
<CAPTION>

         Name                            State or jurisdiction of incorporation
         ----                            --------------------------------------
<S>                                                         <C>
VLT Corporation                                              Texas, USA
Vicor GmbH                                                   Germany
Vicor International Inc.                                     U.S. Virgin Islands
VICR Securities Corporation                                  Massachusetts, USA
Vicor France SARL                                            France
Vicor Italy SRL                                              Italy
Vicor Hong Kong Ltd.                                         Hong Kong
Vicor U.K. Ltd.                                              United Kingdom
Vicor B.V.                                                   Netherlands
Vicor Japan Company Ltd.                                     Japan
Vicor Development Corporation                                Delaware, USA
       Aegis Power Systems, Inc.                             Delaware, USA
       Mission Power Solutions, Inc.                         Delaware, USA
       Northwest Power Integrations, Inc.                    Delaware, USA
       Converpower Corporation                               Delaware, USA
       Freedom Power Systems, Inc.                           Delaware, USA

</TABLE>




Exhibit 23.1

                         CONSENT OF INDEPENDENT AUDITORS

We consent to the incorporation by reference in the Registration Statement (Form
S-8, No. 33-37491)  pertaining to the Vicor  Corporation 1984 Stock Option Plan,
the  Registration  Statement  (Form S-8, No.  33-65154)  pertaining to the Vicor
Corporation 1993 Stock Option Plan and in the Registration  Statement (Form S-8,
No.  333-61177)  pertaining to the 1998 Stock Option and  Incentive  Plan of our
report  dated  January 26,  2000,  with  respect to the  consolidated  financial
statements and schedule of Vicor Corporation included in the Annual Report (Form
10-K) for the year ended December 31, 1999.

                                                           /s/Ernst & Young LLP



     Boston, Massachusetts
     March 23, 2000


<TABLE> <S> <C>


<ARTICLE>                     5

<CIK>                         0000751978
<NAME>                        VICOR CORPORATION
<MULTIPLIER>                                   1,000
<CURRENCY>                                     U.S. DOLLARS

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                              DEC-31-1999
<PERIOD-START>                                 JAN-01-1999
<PERIOD-END>                                   DEC-31-1999
<EXCHANGE-RATE>                                1
<CASH>                                         69,109
<SECURITIES>                                   0
<RECEIVABLES>                                  32,465
<ALLOWANCES>                                   0
<INVENTORY>                                    33,360
<CURRENT-ASSETS>                               141,874
<PP&E>                                         175,910
<DEPRECIATION>                                 66,831
<TOTAL-ASSETS>                                 268,905
<CURRENT-LIABILITIES>                          18,857
<BONDS>                                        0
                          0
                                    0
<COMMON>                                       477
<OTHER-SE>                                     244,056
<TOTAL-LIABILITY-AND-EQUITY>                   268,905
<SALES>                                        189,887
<TOTAL-REVENUES>                               189,887
<CGS>                                          108,703
<TOTAL-COSTS>                                  108,703
<OTHER-EXPENSES>                               0
<LOSS-PROVISION>                               0
<INTEREST-EXPENSE>                             0
<INCOME-PRETAX>                                27,866
<INCOME-TAX>                                   8,778
<INCOME-CONTINUING>                            19,088
<DISCONTINUED>                                 0
<EXTRAORDINARY>                                0
<CHANGES>                                      0
<NET-INCOME>                                   19,088
<EPS-BASIC>                                    .46
<EPS-DILUTED>                                  .45


</TABLE>


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