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Vicor

vicr · NASDAQ Technology
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Ticker vicr
Exchange NASDAQ
Sector Technology
Industry Hardware, Equipment & Parts
Employees 501-1000
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FY2010 Annual Report · Vicor
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2010 Annual Report & Proxy Statement

 
 
 
 
 
 
39237_ifcibcQ7.qxp:39237_ifcibcQ7  4/29/11  11:00 PM  Page 1

Financial Highlights 2006 – 2010 (In thousands, except per share amounts)

2006

2007

2008

2009

2010

Net Revenues

$192,047

$195,827

$205,368

$197,959

$250,733

Income (Loss) from Operations

(33,182)

1,071

(1,142)

4,773

29,122

Net Income (Loss) 

Attributable to Vicor Corporation

(29,059)

5,335

(3,595)

2,798

33,325

Net Income (Loss) Per Share 

Attributable to Vicor Corporation, Diluted

(0.69)

0.13 

(0.09)

0.07

0.80

Weighted Average Shares  

Attributable to Vicor Corporation, Diluted

Working Capital

Total Assets

Total Liabilities

Total Equity

41,839

123,467

247,461

41,687

114,924

192,458

41,651

65,297

171,922

73,696 

23,978 

20,496 

41,671

74,791

180,577

24,511

41,772

105,454

204,912

25,900

$173,765 

$168,480

$151,426

$156,066

$179,012

Return on Average Equity

(14.8%)

3.1%

(2.3%)

1.8%

19.9%

 Vicor Corporation designs, manufactures and markets
modular power components, configurable power systems, accessory
products and custom power solutions. Built into virtually all
electronic products, power systems convert electric power from a
primary source – a wall outlet, for example – into low, stable
voltages required by electronic circuits. Vicor focuses on demanding,
higher-value add applications for customers ranging from high
volume, global original equipment manufacturers to lower volume
specialty manufacturers.

Vicor has three principal business units:

Our V(cid:129)I Chip Business Unit offers families of high-performance, 

high-density V(cid:129)I Chip™ BCM™ bus converters, PRM™ regulators, 
and VTM™ current multipliers enabling Factorized Power 
Architecture™ (FPA™) systems. Targeted to next generation 
system designs in automated test equipment, defense electronics, 
server / datacenters, solid state lighting, and telecom, V(cid:129)I Chip 
modules support high efficiency, high power density and fast, 
scalable power system development at a low total cost. Leveraging
factorized regulation and isolation / transformation functions, FPA 
power systems provide the flexibility to meet advanced application
requirements. Customers use V(cid:129)I Chips to enable the highest 
power conversion performance and efficiency.

Our Brick Business Unit offers tens of thousands 

Our Picor Business Unit is a fabless designer, developer, and 

of standard and custom high-performance power conversion 
components delivered worldwide with very short development 
and delivery cycles. We also incorporate our brick components 
into standard assemblies that make up our configurable 
product line. When customers have application-specific 
requirements, Vicor Custom Power, with design centers 
throughout the USA, provides exactly the power supplies they 
need with the highest quality and the best value.

marketer of high performance integrated circuits and related 
products for use in a broad variety of power system applications. 
High performance switchers, filters, and other power management
components from Picor are developed with a detailed knowledge 
of end-use power system requirements, resulting in superior 
performance, reliability, and cost-effectiveness. Picor also develops
application-specific power components that are incorporated into 
Vicor’s own products. In fact, the differentiation and power 
conversion innovations of our V(cid:129)I Chip and brick components is 
largely attributable to Picor’s proprietary semiconductor circuitry.

Fellow shareholders:

I am pleased to report Vicor had a strong 2010 and is well positioned for the future.

Vicor’s strategy – enabling complete power system solutions through small, efficient

modular building blocks – addresses a growing market opportunity.

Since inception as a company, we have made the investments necessary to establish

Vicor’s leadership in power management by leveraging advanced power conversion

“engines”, control systems and components. Strong increases in production and revenue
in 2010 evidence the merit of these investments. Notably, 2010 was also a year during

which Vicor achieved substantial profitability and cash generation. 

Revenues for the year ended December 31, 2010, increased by 26.7% to $250.7 million

from $198.0 million for the prior year, reflecting growth across our three primary business

units. Gross profit, as a percentage of revenue, increased to 45.7% for 2010 from 44.2%

for 2009, as the company achieved economies resulting from higher production volumes.

Operating income, as a percentage of revenue, increased to 11.6% for 2010 from 2.4%

for 2009, reflecting the leverage of our organization in achieving higher sales and

production volumes without commensurate increases in expenses. Net income for 2010

was $33.3 million, or $0.80 per diluted share, compared to net income of $2.8 million, 

or $0.07 per diluted share, for 2009. While after-tax profits for 2010 were influenced by

certain non-recurring tax benefits, the year over year increase in profits largely reflected

our improved performance.  

In last year’s letter, I emphasized 2010 and 2011 would be important transitional years for

Vicor, as we drive toward an exciting next phase of market evolution with an expanding

product line and production capabilities. Indeed, transitions are underway in each of our

primary business units:

The Brick Business Unit, which is still our largest, continued its focus on
differentiated customer service through mass customization while introducing
brick, configurable and custom solutions incorporating advanced V•I Chip™
technology. By building on its foundation with new advanced power conversion

technology, the BBU has the potential to grow substantially, while broadening 

its customer base. Breakthrough products, such as the recently announced line 

of VI BRICK bus converters, with higher power density and conversion efficiency

than industry standard bricks, have underscored our capabilities and opened

doors with leading OEMs in networking, data storage and high performance

computing.  

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Throughout the year, 

V•I Chip introduced

important new products

and developed 

promising new 

customer relationships.

The V•I Chip business unit reached several important milestones during 2010
and has entered its own next phase of evolution, with record revenue.

Throughout the year, V•I Chip introduced important new products and developed

promising new customer relationships. Substantially expanded manufacturing

capacity was brought on line, enabling higher volume production. V•I Chips offer

unprecedented power conversion density, efficiency, and design flexibility.

Factorized Power Architecture (“FPA”) enabled by V•I Chips provides power

system designers with higher performance than can be attained with

conventional power architectures. In 2010, V•I Chip introduced two new power

conversion building blocks, the PFM™ and the DCM™, functioning within FPA 

as well as more generic power system implementations. The expanding V•I Chip

product line is establishing itself as a differentiated, superior alternative for high

performance applications, and should support dynamic growth for years to come. 

The Picor business unit, a fabless developer of silicon-centric power
components, made progress in 2010 toward implementing its merchant strategy,
while enabling much of the success of the BBU and V•I Chip with its highly
differentiated controller technology. Although still relatively small as a revenue

contributor, Picor will play a key role in positioning Vicor as a provider of

advanced power management solutions from the AC wall plug to the point 

of load. With an exciting product line of smaller modules that will be highly

complementary to V•I Chips and VI BRICKs, Picor components will greatly expand

the reach of our power conversion engines and power system architecture. 

Vicor’s strategy is driven by our vision of an evolving power system marketplace. As

energy efficiency and power system density are becoming critical performance metrics for

designers of electrically-powered products, our innovations put us at the forefront of this

important shift in customer priorities. As customers seek higher performance with a lower

total cost of ownership, Vicor is uniquely equipped to fill a considerable void in the

competitive landscape. With its three aligned business units, Vicor is capable of providing

differentiated, integrated power system solutions that enable customers to achieve

competitive advantages linked to power system performance. 

Vicor’s evolution will continue in years to come, as VI BRICKs represent a larger
percentage of the BBU’s revenue, while V•I Chip and Picor enjoy dynamic growth. Our
product offering continues to expand, as do the range of applications served and the

breadth of our customer base. I am, therefore, pleased with the progress Vicor has 

made in recent years and enthusiastic about Vicor’s future.

Patrizio Vinciarelli

Chairman of the Board, President and Chief Executive Officer 

April 30, 2011

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5/2/11   3:27:14 PM

Dear Stockholder:

You are cordially invited to attend the 2011 Annual Meeting of Stockholders (the “Annual Meeting”) of

Vicor Corporation (the “Corporation”). The Annual Meeting will be held:

April 25, 2011

DATE:
TIME:
PLACE: Andover Country Club

Thursday, June 23, 2011
5:00 P.M. local time

60 Canterbury Street
Andover, Massachusetts

The attached Notice of Annual Meeting and Proxy Statement cover the formal business of the Annual
Meeting. The Proxy Statement contains a discussion of the matters to be voted upon at the Annual Meeting, at
which the Corporation’s management will report on the operations of the Corporation and be available to
respond to appropriate questions from stockholders.

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

Sincerely yours,

PATRIZIO VINCIARELLI
Chairman of the Board, President and
Chief Executive Officer

(This page intentionally left blank)

VICOR CORPORATION

NOTICE OF ANNUAL MEETING OF STOCKHOLDERS
TO BE HELD ON THURSDAY, JUNE 23, 2011

NOTICE IS HEREBY GIVEN that the 2011 Annual Meeting of Stockholders (the “Annual Meeting”) of

Vicor Corporation, a Delaware corporation (the “Corporation”), will be held on Thursday, June 23, 2011, at
5:00 p.m., local time, at the Andover Country Club, 60 Canterbury Street, Andover, Massachusetts, for the
following purposes:

1. To fix the number of Directors at nine and to elect nine Directors to hold office until the 2012

Annual Meeting of Stockholders and until their respective successors are duly elected and qualified.

2. To hold an advisory vote on executive compensation.

3. To hold an advisory vote on the frequency of stockholder votes on executive compensation.

4. To consider and act upon any other matters that may be properly brought before the Annual

Meeting and at any adjournments or postponements thereof.

Any action may be taken on the foregoing matters at the Annual Meeting on the date specified above, or

on any date or dates to which, by original or later adjournment, the Annual Meeting may be adjourned or to
which the Annual Meeting may be postponed.

The Board of Directors has fixed the close of business on April 29, 2011, as the record date for
determining the stockholders entitled to receive notice of and to vote at the Annual Meeting and any
adjournments or postponements thereof. Only stockholders of record at the close of business on that date will
be entitled to receive notice of and to vote at the Annual Meeting and any adjournments or postponements
thereof.

You are requested to authorize a proxy to vote your shares by completing, dating and signing the enclosed

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

By Order of the Board of Directors

James A. Simms
Secretary

Andover, Massachusetts
April 25, 2011

Whether or not you plan to attend the Annual Meeting, please complete, sign, date and
promptly return the enclosed Proxy Card in the enclosed postage-prepaid envelope. If
you attend the Annual Meeting, you may vote your shares in person if you wish, even if
you have previously returned your Proxy Card.

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

PROXY STATEMENT

FOR THE 2011 ANNUAL MEETING OF STOCKHOLDERS
TO BE HELD ON THURSDAY, JUNE 23, 2011

April 25, 2011

This Proxy Statement is furnished in connection with the solicitation of proxies by the Board of Directors
(the “Board”) of Vicor Corporation (the “Corporation”) from owners of the outstanding shares of capital stock
of the Corporation (the “Stockholders”, or as an individual, a “Shareholder”) for use at the 2011 Annual
Meeting of Stockholders (the “Annual Meeting”) of the Corporation to be held on Thursday, June 23, 2011, at
5:00 p.m., local time, at the Andover Country Club, 60 Canterbury Street, Andover, Massachusetts, and at any
adjournments or postponements thereof. At the Annual Meeting, Stockholders will be asked to consider and
vote on the proposals set forth in this Proxy Statement.

This Proxy Statement and the accompanying Notice of Annual Meeting and Proxy Card are first being

sent to Stockholders on or about May 20, 2011. The Board of Directors has fixed the close of business on
April 29, 2011, as the record date for the determination of Stockholders entitled to receive notice of and to
vote at the Annual Meeting (the “Record Date”). Only Stockholders of record at the close of business on the
Record Date will be entitled to receive notice of and to vote at the Annual Meeting. As of March 31, 2011,
there were 30,007,173 shares of Common Stock and 11,767,052 shares of Class B Common Stock of the
Corporation outstanding and entitled to vote. Each share of Common Stock entitles the holder thereof to one
vote per share and each share of Class B Common Stock entitles the holder thereof to 10 votes per share.
Shares of Common Stock and Class B Common Stock will vote together as a single class on the proposals set
forth in this Proxy Statement.

Stockholders of the Corporation are requested to complete, date, sign and return the accompanying Proxy
Card in the enclosed postage-prepaid envelope. Shares represented by a properly executed Proxy Card received
prior to the vote at the Annual Meeting and not revoked will be voted at the Annual Meeting as directed on
the Proxy Card. If a properly executed Proxy Card is submitted and no instructions are given, the shares so
represented will be voted FOR the sole proposal set forth herein. It is not anticipated any matters other than
those set forth in this Proxy Statement will be presented at the Annual Meeting. If other matters are presented,
proxies will be voted in accordance with the discretion of the proxy holders.

A Stockholder of record may revoke a proxy at any time before it has been exercised by (1) filing a
written revocation with the Secretary of the Corporation at the address of the Corporation set forth above;
(2) filing a duly executed proxy bearing a later date; or (3) appearing in person, notifying the Secretary and
voting by ballot at the Annual Meeting. Any Stockholder of record as of the Record Date attending the Annual
Meeting may vote in person whether or not a proxy has been previously given, but the presence (without
further action) of a Stockholder at the Annual Meeting will not constitute revocation of a previously given
proxy. The presence, in person or by proxy, of Stockholders of a majority in interest of all capital stock issued,
outstanding and entitled to vote at the Annual Meeting shall constitute a quorum for the transaction of business
at the Annual Meeting. Shares that reflect abstentions or “broker non-votes” (i.e., shares held by investment
brokerage firms or other nominees that are represented at the Annual Meeting but as to which such brokers or
nominees have not received instructions from the beneficial owners or persons entitled to vote such shares
and, with respect to one or more but not all matters, such brokers or nominees do not have discretionary
voting power to vote such shares) will be counted for purposes of determining whether a quorum is present for
the transaction of business at the Annual Meeting.

The cost of solicitation of proxies in the form enclosed herewith will be borne by the Corporation. In

addition to the solicitation of proxies by mail, the Directors, officers and employees of the Corporation may
also solicit proxies personally or by telephone, e-mail or other form of electronic communication without
special compensation for such activities. The Corporation will also request those holding shares in their names
or in the names of their nominees that are beneficially owned by others to send proxy materials to and obtain
proxies from such beneficial owners. The Corporation will reimburse such holders for their reasonable
expenses in connection therewith.

The Corporation’s 2010 Annual Report (the “Annual Report”), including financial statements for the fiscal

year ended December 31, 2010, is being mailed to stockholders concurrently with this Proxy Statement. The
Annual Report, however, is not part of the proxy solicitation materials. The Corporation will deliver promptly,
upon written or oral request, a separate copy of the Annual Report or Proxy Statement, as applicable, to a
Stockholder at a shared address to which a single copy of the document was delivered.

Important notice regarding the availability of proxy materials for the Annual Meeting to be held on

June 23, 2011:

The Proxy Statement and Annual Report to Stockholders is available at www.vicorpower.com/proxy.

PROPOSAL 1

ELECTION OF DIRECTORS

The Board of the Corporation has recommended the number of Directors be fixed at nine and has

nominated the nine individuals named below for election as Directors. Each of the nominees is presently
serving as a Director of the Corporation. If elected, each nominee will serve until the 2012 Annual Meeting of
Stockholders and until his respective successor is duly elected and qualified or until his death, resignation or
removal. Properly executed Proxy Cards will be voted for the nominees named below unless otherwise
specified. The Board anticipates each of the nominees, if elected, will serve as a Director. However, if any
person nominated by the Board is unable to serve or for good cause will not serve, proxies solicited hereby
will be voted for the election of another person designated by the Board, if one is nominated. A plurality of
the votes cast by the Stockholders of Common Stock and Class B Common Stock, voting together as a single
class, for a nominee for Director shall elect such nominee. Accordingly, abstentions, broker non-votes, and
votes withheld from any nominee will have no effect on this proposal.

Dr. Patrizio Vinciarelli, Chairman of the Board, President, and Chief Executive Officer, beneficially

owned, as of February 28, 2011, 9,681,757 shares of Common Stock and 11,023,648 shares of Class B
Common Stock, together representing 81.1% of the voting power of the outstanding stock of the Corporation,
sufficient to elect each of the nominees named below, and has indicated an intention to vote in favor of fixing
the number of Directors at nine and the election of all nominees.

The Board unanimously recommends a vote FOR fixing the number of Directors at nine and the

election of all of the nominees.

Information Regarding Nominees

The following sets forth certain information as of March 31, 2011, with respect to the nine nominees for

election to the Board. The information presented includes information each Director has provided us about
age, all positions held, principal occupation and business experience for the past five years, and the names of
other publicly-held companies for which the Director currently serves as a director or has served as a director
during the past five years. In addition to the information presented below regarding each nominee’s specific
experience, qualifications, and skills that led the Board as a whole to conclude the nominee possessed the
necessary attributes to serve as a Director, the Board as a whole also considered each nominee’s reputation for
integrity, honesty and adherence to high ethical standards.

2

Information regarding the beneficial ownership of shares of the capital stock of the Corporation by such
persons is set forth in the section of this Proxy Statement entitled “Principal and Management Stockholders.”
See also “Certain Relationships and Related Transactions.” There is no family relationship among any of the
Directors or executive officers of the Corporation.

Name

Director
Since

Age

Principal Occupation for Past Five Years

Patrizio Vinciarelli. . . . . . . . . . . . . . . . .

64

1981 Dr. Vinciarelli has been Chairman of the Board,

President and Chief Executive Officer of the
Corporation since 1981. Dr. Vinciarelli is qualified
to serve on our Board of Directors, given his
standing as a leading innovator in the development
of power conversion technologies and his role as the
Company’s founder, President and Chief Executive
Officer.

Estia J. Eichten . . . . . . . . . . . . . . . . . . .

64

1981 Dr. Eichten has been Senior Scientist with the

Fermi National Accelerator Laboratory since 1989.
While a Director of the Corporation, he served as
President of VLT Corporation, a wholly-owned
subsidiary of the Corporation, from 1987 to 2000,
and has served as a Director of VLT, Inc., a
wholly-owned subsidiary of the Corporation since
July 2000. Dr. Eichten’s qualifications to serve on
our Board of Directors include his extensive
knowledge of electronics and power conversion, as
well as his deep understanding of our products and
organization that he has acquired in his 30 years of
service as a Director.

David T. Riddiford . . . . . . . . . . . . . . . .

75

1984 Mr. Riddiford served from 1987 until his retirement

in 2005 as the general partner of Pell, Rudman
Venture Management, L.P., which is the general
partner of PR Venture Partners, L.P., a venture
capital affiliate of Pell, Rudman & Co., Inc., an
investment advisory firm. Mr. Riddiford also served
as a member of the Board of Directors of
Datawatch Corporation, a publicly-held provider of
enterprise reporting and business intelligence
solutions and support center software from 1989
until his retirement in 2010. Mr. Riddiford’s
qualifications to serve on our Board of Directors
include four decades of experience in investing,
monitoring and advising companies as a venture
capitalist, as well as the deep understanding of our
business that he has acquired in his 27 years of
service as a Director.

3

Name

Director
Since

Age

Principal Occupation for Past Five Years

Barry Kelleher. . . . . . . . . . . . . . . . . . . .

62

1999 Mr. Kelleher has been President of the

Samuel J. Anderson . . . . . . . . . . . . . . . .

54

Corporation’s Brick Business Unit since 2006 and
earlier served as Senior Vice President, Global
Operations and General Manager of the
Corporation’s Brick Business Unit (from 2005 to
2006), Senior Vice President, Global Operations
(from 1999 to 2005), and Senior Vice President,
International Operations (from 1993 to 1999).
Mr. Kelleher’s qualifications to serve on our Board
of Directors include his long-standing tenure as a
senior executive in the power conversion industry,
his leadership role in the Company, and his
considerable experience in power industry sales and
operations management.

2001 Mr. Anderson has been the Chairman of the Board,
President and Chief Executive Officer of Great Wall
Semiconductor Corporation, a semiconductor
manufacturer, since its inception in 2002. He also
has served as non-executive Chairman of the Board
of Directors of Advanced Analogic Technologies
Inc., a publicly-held supplier of power management
semiconductors, since 2001. Earlier, Mr. Anderson
was Vice President of Corporate Business
Development of ON Semiconductor Corporation, a
supplier of semiconductors (from 1999 to 2001) and
held various positions within the semiconductor
operations of Motorola, Inc. (from 1984 to 1999).
Mr. Anderson is qualified to serve on our Board of
Directors, given his technical expertise and his
experience as an executive and director of other
companies in the semiconductor and power
management industries.

Claudio Tuozzolo . . . . . . . . . . . . . . . . .

48

2007 Mr. Tuozzolo has been President of Picor

Corporation, a subsidiary of the Corporation, since
2003. Earlier he had been Director of Integrated
Circuit Engineering for the Corporation from
February 2003 to November 2003 and Manager of
Integrated Circuit Design from 2001 to February
2003. Before joining the Corporation, Mr. Tuozzolo
was a Principal Design Engineer for SIPEX
Corporation from 1999 to 2001. Mr. Touzzolo is
qualified to serve on our Board of Directors, given
his role as leader of our strategically important
Picor subsidiary, his extensive experience in the
semiconductor and power management industries,
and his technical expertise and knowledge of our
products.

4

Name

Director
Since

Age

Principal Occupation for Past Five Years

James A. Simms . . . . . . . . . . . . . . . . . .

51

2008 Mr. Simms has been Chief Financial Officer and

Secretary of the Corporation since 2008. From
2007 until 2008, he was a Managing Director of
Needham & Company, LLC, an investment banking
and asset management firm. Earlier, he had served
as a Managing Director with the investment banking
firm of Janney Montgomery Scott LLC, a wholly
owned subsidiary of The Penn Mutual Life
Insurance Company (from 2004 to 2007) and as a
Managing Director of the investment banking firm
of Adams, Harkness & Hill, Inc. (from 1997 to
2004). Mr. Simms is a member of the Board of
Directors of PAR Technology Corporation, a
publicly-held provider of information technology
solutions in the hospitality and specialty retail
industries, as well as a provider of advanced
technology systems and support services to the
United States military and other governmental
agencies. Mr. Simms is qualified to serve on our
Board of Directors, given his prior career in
investment banking, his familiarity with the
securities markets, his expertise with complex
financial matters, and his experience as a director of
other companies.

Jason L. Carlson . . . . . . . . . . . . . . . . . .

49

2008 Mr. Carlson has been President and CEO of QD

Vision, a developer of nanotechnology-based
products for solid state lighting and displays since
2010. Prior to joining QD Vision, Mr. Carlson
served as Chief Executive Officer of Emo Labs,
Inc., an early-stage developer of innovative audio
speaker technology from 2006 to 2010. From 2002
to 2005, he was President and Chief Executive
Officer of Semtech Corporation, a publicly-traded
vendor of analog and mixed-signal semiconductors,
with an emphasis on power management
applications. From 1999 to 2002, he was Vice
President & General Manager for the Crystal
Product Division and the Consumer Products &
Data Acquisition Division of Cirrus Logic, Inc. a
publicly-traded vendor of analog and mixed-signal
semiconductors for consumer and industrial
applications. Mr. Carlson joined Cirrus Logic in
1999 when that company acquired AudioLogic,
Inc., of which he had been Chief Executive Officer.
In 2010, Mr. Carlson was appointed a member of
the Board of Directors of Advanced Analogic
Technologies, Inc., a publicly-held supplier of
power management semiconductors. Mr. Carlson’s
qualifications to serve on our Board of Directors
include his experience as both a public company
executive and as an entrepreneur, his experience as
a director of other companies, as well as his
understanding of the evolution of technical
innovation in the semiconductor and power
conversion industries.

5

Name

Director
Since

Age

Principal Occupation for Past Five Years

Liam K. Griffin . . . . . . . . . . . . . . . . . . .

44

2009 Mr. Griffin has been Senior Vice President, Sales
and Marketing, for Skyworks Solutions,
Incorporated, a designer, manufacturer and marketer
of performance analog and mixed signal
semiconductors that enable wireless connectivity
since 2001. Previously, he was employed by Vectron
International, a division of Dover Corp., as Vice
President of Worldwide Sales from 1997 to 2001,
and as Vice President of North American Sales
from 1995 to 1997. His prior experience included
positions in marketing and engineering with units of
AT&T Corp. Mr. Griffin’s qualifications to serve on
our Board of Directors include his experience in
building and managing sales and marketing
organizations in technology-driven, global
organizations.

PROPOSAL 2

ADVISORY VOTE ON EXECUTIVE COMPENSATION

The Board is requesting stockholder approval of the compensation of the Corporation’s named executive

officers as disclosed in this proxy statement pursuant to Item 402 of Regulation S-K (referred to as “Say on
Pay”), including in the Compensation Discussion and Analysis section (“CD&A”), compensation tables and
accompanying narrative disclosures. Item 402 of Regulation S-K is the Securities and Exchange Commission
(the “SEC”) regulation that sets forth what companies must include in their CD&A and compensation tables.
As required by the Securities Exchange Act of 1934, as amended (the “Exchange Act”), this is an advisory
vote, which means this proposal is not binding on the Corporation. However, the Executive Compensation
Committee values the opinions expressed by the Corporation’s stockholders and will carefully consider the
outcome of the vote when making future compensation decisions for the Corporation’s executive officers.

The following summarizes certain elements of the Corporation’s executive compensation program:

(cid:129) The Corporation’s compensation programs are substantially tied into its key business objectives and

corporate goals.

(cid:129) The Corporation closely monitors the compensation programs and pay levels of executives from

companies of similar size, within the same industry, and/or within the same geographic region, so that
the Corporation may ensure its compensation programs are competitive and within the norm of a range
of market practices.

(cid:129) During 2010, the Corporation granted performance-based stock options under the Vicor Corporation
Amended and Restated 2000 Stock Option and Incentive Plan (the “2000 Vicor Plan”) to certain
employees of the Brick Business Unit and under the V*I Chip Corporation Amended 2007 Stock
Option and Incentive Plan (the “2007 V*I Chip Plan”) to certain employees of the V*I Chip Business
Unit. Certain executive officers of the Corporation also received grants of these performance-based
awards. The options will vest upon the achievement of certain performance targets.

(cid:129) The Executive Compensation Committee has reviewed the Corporation’s incentive compensation

programs and discussed the concept of risk as it relates to the Corporation’s compensation program.
The Executive Compensation Committee does not believe the Corporation’s executive compensation
program encourages excessive or inappropriate risk taking.

6

For these and other reasons, the Board believes the Corporation’s executive compensation program is
well-designed, appropriately aligns executive pay with Corporation performance, and incentivizes desirable
and appropriate behavior from its executives.

The Board unanimously recommends a vote FOR approval of the compensation of the Corporation’s

named executive officers as disclosed in this Proxy Statement.

PROPOSAL 3

ADVISORY VOTE ON THE FREQUENCY OF STOCKHOLDER VOTES
ON EXECUTIVE COMPENSATION

As required by the Exchange Act, the Board is asking stockholders to advise the Corporation as to how

frequently they wish to cast an advisory vote on the compensation of the Corporation’s named executive
officers: once every year, once every two years, or once every three years.

The Board believes setting a three year period between stockholder votes will provide a clear, simple
means for the Board to obtain information on investor sentiment about executive compensation. An advisory
vote every three years will be the most effective timeframe for the Board to respond to stockholder feedback
with sufficient time to engage with stockholders to understand and respond to the vote results. The Board is
concerned an annual vote could encourage a short-term approach to the Corporation’s compensation plans,
based on short-term business or market conditions. The Board strives to encourage a long-term focus among
the Corporation’s executives by, for example, making equity awards that vest over long periods (generally five
years). The Board believes a vote on the Corporation’s compensation by its stockholders every three years will
encourage stockholders to take the same long-term approach to the Corporation’s compensation programs
taken by its executives and the Executive Compensation Committee.

As required by the Exchange Act, this is an advisory vote, which means this proposal is not binding on

the Corporation. However, the Corporation’s Executive Compensation Committee values the opinions
expressed by stockholders and expects to implement the frequency of vote receiving the most support from the
Corporation’s stockholders. While the Board believes a vote once every three years is the best choice for the
Corporation, you are not voting to approve or disapprove the Board’s recommendation of three years, but
rather to make your own choice among a vote once every year, every two years or every three years. You may
also abstain from voting on this item.

The Board unanimously recommends a vote FOR a vote on the Corporation’s executive compensation

program once every THREE years.

CORPORATE GOVERNANCE

The Board and Its Committees

The Corporation is a “controlled company” in accordance with the corporate governance rules contained

in the Marketplace Rules of the Nasdaq OMX Group, Inc. (the “NASDAQ Rules”) because Dr. Vinciarelli,
Chairman of the Board, President, and Chief Executive Officer, holds more than 50% of the voting power of
the outstanding capital stock of the Corporation. As a result, the Corporation is not required to have (1) a
majority of independent Directors on its Board of Directors, (2) the compensation of its executive officers
determined by independent Directors, nor (3) its Director nominees selected or recommended by independent
Directors. The Board has determined four of its nine Directors (Messrs. Carlson, Eichten, Griffin and
Riddiford) are independent Directors for purposes of the NASDAQ Rules.

Due to the Corporation status as a controlled company and Dr. Vinciarelli’s leadership of the Corporation
since its founding, Dr. Vinciarelli fulfills both the roles of Chief Executive Officer and Chairman of the Board.
As Chief Executive, he is responsible for setting the strategic direction of the Corporation and the day to day
leadership and performance of the Corporation. As Chairman of the Board, Dr. Vinciarelli presides over

7

meetings of the Board and, in collaboration with Mr. Simms, in his capacity as Secretary of the Corporation,
establishes an agenda for each meeting.

The Board held three meetings during the fiscal year ended December 31, 2010. Each of the Directors

attended 75% or more of the total number of meetings of the Board and meetings of the committees thereof.
Directors are expected to attend each year’s Annual Meeting in person unless doing so is impracticable due to
unavoidable conflicts. All of the Directors attended the 2010 Annual Meeting of Stockholders.

The Board has established an Audit Committee and an Executive Compensation Committee. The Board

does not have a standing Nominating Committee because it believes the Board as a whole is in the best
position to evaluate potential Director nominees and, therefore, it is not necessary for the Corporation to have
a separate committee responsible for such evaluations. The full Board performs the function of such a
committee.

The Audit Committee is composed of Messrs. Carlson, Eichten and Riddiford. Information regarding the

functions performed by the Audit Committee and the number of meetings held during the fiscal year is set
forth in the section of this Proxy Statement entitled “Report of the Audit Committee”. The Audit Committee
is governed by a written charter approved by the Board on February 3, 2007. The Board has determined all
three members of the Audit Committee are “independent” under the applicable NASDAQ Rules and rules of
the SEC. The Board also has determined one of the present members of the Audit Committee, Mr. Carlson,
meets the definition of “audit committee financial expert” as defined by Item 407(d) of Regulation S-K
promulgated by the SEC. The Audit Committee Charter is posted on the Corporation’s website,
www.vicorpower.com, under the heading “Company” and the subheading “Corporate Governance”. The Audit
Committee held eight formal meetings during 2010.

The Executive Compensation Committee is currently composed of Messrs. Carlson, Eichten, Griffin and
Riddiford. The Executive Compensation Committee is responsible for establishing salaries, bonuses and other
compensation for the officers of the Corporation, approving all grants of stock options by the Corporation and
its subsidiaries, and administering the Corporation’s stock option and bonus plans pursuant to authority
delegated to it by the Board. The Executive Compensation Committee held two formal meetings during 2010
and acted by written consent in lieu of meetings on 16 occasions to approve stock option awards granted
during 2010.

The Board has an active role, as a whole and also at the committee level, in overseeing management of

the Corporation’s risks. The Board regularly reviews information regarding the Corporation’s strategy,
operations, financial position, and legal affairs, addressing the risks associated with each.

While the Board is ultimately responsible for the Corporation’s risk analysis and risk management

procedures, the Audit Committee assists the Board in overseeing such responsibilities, with particular focus on
the integrity and effectiveness of the Corporation’s financial reporting processes. The Audit Committee reviews
guidelines and policies on enterprise risk management, including risk assessment and risk management related
to the Company’s major financial risk exposures and management’s monitoring and control of such exposures.
At each meeting of the Audit Committee, management presents information addressing issues related to risk
analysis and risk management.

In addition to the risk oversight role undertaken by the Audit Committee, the Executive Compensation
Committee assists the Board in overseeing the Corporation’s compensation policies and practices as they relate
to the Corporation’s risk management and risk-taking incentives. The Executive Compensation Committee has
determined the compensation policies and practices for the Corporation’s employees are not reasonably likely
to have a material adverse effect on the Corporation.

Director Nomination Process

The full Board performs the Director nomination function for the Corporation. The Board does not have a
charter governing the Director nomination process, although it has established Director nomination procedures
setting forth the current process for identifying and evaluating Director nominees.

8

Board Membership Criteria — The Board has established the following minimum qualifications for

nomination to the Board. At a minimum, the Board must be satisfied each nominee has high personal and
professional integrity, has demonstrated exceptional ability and judgment, and is expected, in the judgment of
the Board, to be highly effective, in collaboration with the other nominees to the Board, in collectively serving
the interests of the Corporation and its Stockholders. In addition to the minimum qualifications for each
nominee set forth above, the Board seeks to select for nomination persons possessing relevant industry or
technical experience and, so that the independence of the Audit Committee is maintained, persons meeting the
“independence” requirements of the NASDAQ Rules and the SEC.

Identifying and Evaluating Nominees — The Board may solicit recommendations from any or all sources

it deems appropriate. The Board will evaluate all proposed nominees in the same manner, evaluating the
qualifications of any recommended candidate and conducting inquiries it deems appropriate, without discrim-
ination on the basis of race, religion, national origin, sexual orientation, disability or any other basis proscribed
by law. In identifying and evaluating proposed nominees, the Board may consider, in addition to the minimum
professional qualifications discussed above and other criteria for Board membership approved by the Board
from time to time, all facts and circumstances that it deems appropriate or advisable, including, among other
things, the diversity of experience, geographic representation, and backgrounds of existing Directors. Based on
these considerations, the Board may nominate a Director candidate it believes will, together with the existing
Directors and other nominees, best serve the interests of the Corporation and its Stockholders.

Stockholder Recommendations — The Board’s current policy is to review and consider, in accordance

with the procedures described above, any candidates for Director recommended by Stockholders of the
Corporation entitled to vote in the election of Directors. All Stockholder recommendations for Director
candidates must be submitted to the Secretary of the Corporation at Vicor Corporation, 25 Frontage Road,
Andover, MA 01810.

All Stockholder recommendations for Director candidates must include the following information:

(cid:129) the name and address of record of the Stockholder;

(cid:129) a representation that the Stockholder is a record holder of shares of stock of the Corporation entitled to
vote in the election of Directors, or if the Stockholder is not a record holder, evidence of ownership in
accordance with Rule 14a-8(b)(2) promulgated under the Exchange Act;

(cid:129) the name, age, business and residential address, educational background, current principal occupation or

employment, and principal occupation or employment for the preceding five full fiscal years of the
proposed Director candidate;

(cid:129) a description of the qualifications and background of the proposed Director candidate that addresses the
minimum qualifications and other criteria for Board membership approved by the Board from time to
time;

(cid:129) a description of all arrangements or understandings between the Stockholder and the proposed Director

candidate;

(cid:129) the consent of the proposed Director candidate (1) to be named in the proxy statement relating to the
Corporation’s Annual Meeting and (2) to serve as a Director if elected at such Annual Meeting; and

(cid:129) any other information regarding the proposed Director candidate required to be included in a proxy

statement filed pursuant to the rules of the SEC.

Communications with the Board

If a Shareholder wishes to communicate with any Director or the Board as a whole, he or she may do so

by addressing such communications to: [Name(s) of Director(s)/Board of Directors of Vicor Corporation],
c/o Corporate Secretary, Vicor Corporation, 25 Frontage Road, Andover, MA 01810. All correspondence
should be sent via certified U.S. mail, return receipt requested. All correspondence received by the Corporate
Secretary will be forwarded by the Corporate Secretary promptly to the addressee(s).

9

Code of Business Conduct and Ethics

The Corporation has established and adopted a Code of Business Conduct and Ethics. This Code of
Business Conduct and Ethics is posted on the Corporation’s website, www.vicorpower.com, under the heading
“Company” and the subheading “Corporate Governance”.

Executive Officers

Executive officers hold office until the first meeting of the Board of Directors following the next annual

meeting of stockholders and until their successors are elected and qualified or until their earlier death,
resignation or removal. The following persons are the executive officers of the Corporation.

Patrizio Vinciarelli, Ph.D., 64, Chairman of the Board, President and Chief Executive Officer.

Dr. Vinciarelli founded the Corporation in 1981 and has served as Chairman, President and Chief Executive
Officer since that time.

H. Allen Henderson, 63, President, Westcor Division, and Vice President of the Corporation, since March

1999. Mr. Henderson also has served as President and Chief Executive Officer of VLT, Inc., a wholly-owned
subsidiary of the Corporation, since July 2000. Mr. Henderson held the position of General Manager of the
Westcor Division from 1987 to 1999 and Sales Manager from 1985 to 1987. Prior to joining the Corporation
in 1985, Mr. Henderson was employed at Boschert, Inc., a manufacturer of power supplies, since 1984, serving
as Director of Marketing.

Douglas W. Richardson, 63, Vice President and Chief Information Officer, since November 2000. From

1996 to 2000, Mr. Richardson held the position of Director, Application Development, and, from 1994 to
1996, Manager, Computer Integrated Manufacturing of the Corporation. Prior to joining the Corporation in
1994, Mr. Richardson was a Program Manager and Director of Quality Management from 1982 to 1994 for
ITP Systems, a subsidiary of PricewaterhouseCoopers LLP, specializing in manufacturing automation systems.

Barry Kelleher, 62, President of the Corporation’s Brick Business Unit, since May 2006. Mr. Kelleher

held the positions of Senior Vice President, Global Operations and General Manager of the Corporation’s
Brick Business Unit from June 2005 to May 2006, Senior Vice President, Global Operations from March 1999
to June 2005, and Senior Vice President, International Operations from 1993 to 1999. Prior to joining the
Corporation in 1993, Mr. Kelleher was employed by Computer Products Inc., a manufacturer of power
conversion products, since 1981, where he held the position of Corporate Vice President and President of the
Power Conversion Group.

Richard E. Zengilowski, 56, Vice President, Human Resources, since August 2001. Prior to joining the

Corporation in 2001, Mr. Zengilowski was employed by Simplex Time Recorder Co., a manufacturer of
automated time and attendance products, from 1992 to 2001, serving as Assistant General Counsel from 1992
to 1998 and Director of Legal Affairs, Human Resources from 1998 to 2001.

Richard J. Nagel, Jr., 54, Vice President, Chief Accounting Officer, since May 2006. From December

2007 to April 2008, Mr. Nagel also held the position of Interim Chief Financial Officer. From 2005 to 2006,
Mr. Nagel held the position of Senior Director, Corporate Controller, and, from 1996 to 2005, Director,
Corporate Controller. Prior to joining the Corporation in 1996, Mr. Nagel was employed by Ernst & Young
LLP, an international public accounting firm, serving in a variety of positions from 1982 to 1996, most
recently as Senior Manager.

James A. Simms, 51, Chief Financial Officer and Secretary, since April 2008. Prior to joining the

Corporation, Mr. Simms held the position of Managing Director of Needham & Company, LLC, an investment
banking and asset management firm, from March 2007 to April 2008. From November 2004 to March 2007,
Mr. Simms held the position of Managing Director with the investment banking firm of Janney Montgomery
Scott LLC, a wholly owned subsidiary of The Penn Mutual Life Insurance Company. From 1997 to 2004,
Mr. Simms served in a series of senior positions with the investment banking firm of Adams, Harkness & Hill,
Inc.

10

Philip D. Davies, 51, Vice President, Global Sales and Marketing, since February 2011. Prior to joining

the Corporation, Mr. Davies was employed by the new Solid State Light Engine business unit of OSRAM
Sylvania as Business Creation Team Leader Solid State Light Engines from September 2010 to February 2011.
From 2006 to 2010, Mr. Davies held the position of Vice President, Sales and Marketing, with NoblePeak
Vision Corporation, a developer of night vision camera cores. From 1995 to 2006, Mr. Davies served in
various positions with Analog Devices, Inc., a manufacturer of high-performance analog, mixed-signal and
digital signal processing integrated circuits, most recently as Director of World Wide Business Development.
From 1987 to 1995, Mr. Davies served in a number of positions with Allegro MicroSystems, Inc., a
manufacturer of high-performance power and Hall-effect sensor integrated circuits, most recently as Vice
President, Engineering.

PRINCIPAL AND MANAGEMENT STOCKHOLDERS

The following table sets forth the beneficial ownership of the Corporation’s Common Stock and Class B

Common Stock held by (1) each person or entity known to the Corporation to be the beneficial owner of more
than five percent of the outstanding shares of either class of the Corporation’s common stock, (2) each
Director of the Corporation (and Director nominee), (3) each of the executive officers of the Corporation
named in the Summary Compensation Table, and (4) all Directors and executive officers as a group (including
Director nominees), based on representations of the Directors and executive officers of the Corporation as of
February 28, 2011, a review of filings on Forms 3, 4, 5, 13F and on Schedules 13D and 13G under the
Exchange Act . Except as otherwise specified, the named beneficial owner has sole voting and investment
power over the shares. The information in the table reflects shares outstanding of each class of common stock
on February 28, 2011, and does not, except as otherwise indicated below, take into account conversions after
such date of shares of Class B Common Stock into Common Stock. Subsequent conversions of Class B
Common Stock into Common Stock will increase the voting control of persons who retain shares of Class B
Common Stock. The percentages have been determined as of February 28, 2011, in accordance with Rule 13d-3
under the Exchange Act, and are based on a total of 41,770,201 shares of common stock that were outstanding
on such date, of which 30,003,149 were shares of Common Stock entitled to one vote per share and
11,767,052 were shares of Class B Common Stock entitled to 10 votes per share. Each share of Class B
Common Stock is convertible into one share of Common Stock at any time upon the election of the holder
thereof.

Total
Number of
Shares Beneficially
Owned(2)(3)

Percent of
Common Stock
Beneficially
Owned

Percent of
Class B
Common Stock
Beneficially
Owned

Percent
of Voting
Power

Name of Beneficial Owner(1)

Patrizio Vinciarelli . . . . . . . . . . . . . . . . . . . . . .
Estia J. Eichten . . . . . . . . . . . . . . . . . . . . . . . .
David T. Riddiford . . . . . . . . . . . . . . . . . . . . . .
Barry Kelleher . . . . . . . . . . . . . . . . . . . . . . . . .
Samuel J. Anderson . . . . . . . . . . . . . . . . . . . . .
Richard E. Zengilowski . . . . . . . . . . . . . . . . . .
James A. Simms . . . . . . . . . . . . . . . . . . . . . . .
Claudio Tuozzolo . . . . . . . . . . . . . . . . . . . . . . .
Jason L. Carlson . . . . . . . . . . . . . . . . . . . . . . .
Liam K. Griffin . . . . . . . . . . . . . . . . . . . . . . . .
All Directors and executive officers

20,705,405
1,175,348(4)
100,596(5)
26,257
30,871
16,060
20,000
824
9,624
3,000

32.1%
1.6%
*
*
*
*
*
*
*
*

34.3%

as a group (13 persons). . . . . . . . . . . . . . . . .

22,095,637

Manatuck Hill Partners, LLC(6)

1465 Post Road East
Westport, CT 06880 . . . . . . . . . . . . . . . . . . .

BlackRock Inc.(7)

40 East 52nd Street
New York, NY 10022 . . . . . . . . . . . . . . . . . .

2,248,000

7.5%

1,524,198

5.1%

11

93.7%
5.9%
*
*
*
*
*
*
*
*

81.1%
5.0%
*
*
*
*
*
*
*
*

99.6%

86.2%

*

*

1.5%

1.0%

* Less than 1%

(1) The address for each of the persons named in the table, but not specified therein, is: c/o Vicor Corporation,

25 Frontage Road, Andover, MA 01810.

(2) Includes shares issuable upon the exercise of options to purchase Common Stock of the Corporation that

are exercisable or will become exercisable on or before April 30, 2011 in the following amounts:

Name of Beneficial Owner

Patrizio Vinciarelli . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Estia J. Eichten . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
David T. Riddiford . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Barry Kelleher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Samuel J. Anderson . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Richard E. Zengilowski . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
James A. Simms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Claudio Tuozzolo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jason L. Carlson . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Liam K. Griffin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Shares

6,277
3,624
3,624
24,000
23,624
15,500
20,000
824
9,624
3,000

(3) The calculation of the total number of shares of Common Stock beneficially owned includes the following:
for Dr. Vinciarelli, 11,023,648 shares of Class B Common Stock; for Mr. Eichten 690,700 shares of Class B
Common Stock; and for all Directors and executive officers as a group, 11,714,348 shares of Class B
Common Stock.

(4) Includes 8,750 shares of Common Stock beneficially owned by Mr. Eichten’s spouse as to which

Mr. Eichten disclaims beneficial ownership. In addition, includes 71,945 shares of Common Stock held by
the Belle S. Feinberg Memorial Trust of which Mr. Eichten is a trustee. Mr. Eichten disclaims beneficial
ownership of the shares of Common Stock held by the Belle S. Feinberg Memorial Trust.

(5) Includes 4,500 shares of Common Stock beneficially owned by Mr. Riddiford’s spouse as to which

Mr. Riddiford disclaims beneficial ownership.

(6) Information reported is based upon a Form 13F filed on January 26, 2011. This Form 13F indicates the

reporting person (i) has sole voting power with respect to 2,248,000 of the shares, and (ii) sole dispositive
power with respect to 2,248,000 of the shares. We have not made any independent determination as to the
beneficial ownership of such holder and are not restricted in any determination we may make by reason of
inclusion of such holder or its shares in this table.

(7) Information reported is based upon a Schedule 13G filed on January 21, 2011. This Schedule 13G indi-
cates the reporting person (i) has sole voting power with respect to 1,524,198 of the shares, and (ii) sole
dispositive power with respect to 1,524,198 of the shares. We have not made any independent determina-
tion as to the beneficial ownership of such holder and are not restricted in any determination we may make
by reason of inclusion of such holder or its shares in this table.

COMPENSATION DISCUSSION AND ANALYSIS

Philosophy

The primary objective of the Corporation’s compensation program is to attract, motivate, and retain highly

qualified and productive employees, using a combination of cash and equity based rewards geared to incent
and reward superior performance. Salaries and cash bonuses encourage effective performance relative to
current plans and objectives, while stock options are utilized to attract new talent, to retain key contributors,
promote longer-term focus and to more closely align the interests of employees holding such options with
those of Stockholders.

12

The compensation of the Corporation’s executive officers reflects their success as a team in attaining key

performance indicators. In addition, each executive officer’s individual performance (as described below)
represents the basis for determining his or her overall compensation.

Overview of Executive Compensation and Process

Elements of compensation for executive officers include: salary, cash bonus, stock incentive awards,

health, disability, life insurance and certain perquisites.

The Chief Executive Officer makes compensation recommendations to the Executive Compensation
Committee with respect to the executive officers, although the Executive Compensation Committee may
exercise its discretion in modifying any recommended adjustments or awards. Such executive officers are not
present at the time of these deliberations. The Executive Compensation Committee approves the annual salary
of Dr. Vinciarelli, Chairman of the Board, President, and Chief Executive Officer.

The amount of each element of executive compensation is determined by the Chief Executive Officer and
approved by the Executive Compensation Committee. The following factors are considered in determining the
amount of each executive officer’s compensation:

(cid:129) Performance against corporate and individual goals for the previous year;

(cid:129) The relative effort made and difficulties encountered by the executive officer in pursuit of these

goals; and

(cid:129) Performance in the context of the overall performance of management.

The competitiveness of the Corporation’s compensation program is assessed using local and national
salary survey data. The survey data enables management to benchmark the Corporation against companies of
similar size, within the same industry, and/or within the same geographic region. The survey data is used as a
comparison when completing the annual merit increases for executive officers and salaried employees. The
Chief Executive Officer makes salary recommendations based on the salary data and evaluation of the
respective merit, skills, experience and performance of each executive officer.

As required by the Exchange Act, in conjunction with this Proxy statement the Corporation is conducting
a Say on Pay vote and a vote on the frequency of future Say on Pay votes. These votes are advisory in nature
and are not binding on the Corporation. However, the Executive Compensation Committee values the opinions
expressed by our stockholders and will carefully consider the outcomes of these votes.

SUMMARY COMPENSATION TABLE FOR FISCAL 2010

Name and
Principal
Position

Patrizio Vinciarelli . . . . . . . . . . . . . . . . .

President, Chief
Executive Officer

James A. Simms . . . . . . . . . . . . . . . . . .

Vice President,
Chief Financial Officer

Claudio Tuozzolo. . . . . . . . . . . . . . . . . .

President, Picor
Corporation

Barry Kelleher . . . . . . . . . . . . . . . . . . . .

President, Brick
Business Unit

Richard E. Zengilowski . . . . . . . . . . . . .

Vice President,
Human Resources

Year

2010
2009
2008
2010
2009
2008
2010
2009
2008
2010
2009
2008
2010
2009
2008

Salary
($)(1)

Bonus
($)

Option
Awards
($)(2)

All Other
Compensation
($)(3)

50,000

— 744,450
—
—
—
—
— 124,600
17,022
— 208,541
— 414,223
— 17,022
— 86,332
— 137,402
— 17,022
— 32,582
—
—
—
25,000
— 20,000

23,225
23,028
24,081
29,664
28,364
11,628
22,239
22,514
23,193
32,059
26,554
27,466
21,710
20,125
18,931

351,384
353,347
332,852
277,472
276,800
180,000
254,018
255,577
223,218
319,882
315,875
288,472
232,191
230,832
211,063

13

Total
($)

1,119,059
376,375
356,933
431,736
372,186
400,169
690,480
295,113
332,743
489,343
359,451
348,520
253,901
275,957
249,994

(1) The amounts reported under the column heading “Salary” reflect the actual amounts paid to executive

officers in the respective year. The Corporation pays its salaried employees every two weeks, which creates
an “extra” pay cycle in a year on rare occasions. As a result, there were 27 pay cycles in 2009, while there
were 26 pay cycles in 2010 and 2008. The 2008 salary for Mr. Simms was for the period from April 8,
2008, when he joined the Corporation, through year-end.

(2) The amounts reported under the column heading “Option Awards” reflect the aggregate grant date fair
value of stock option awards in each year presented. These values have been determined under the
principles used to calculate the grant date fair value of equity awards for purposes of the Corporation’s
financial statements. Refer to Note 3, “Stock-Based Compensation and Employee Benefit Plans,” in the
Notes to Consolidated Financial Statements included in the Annual Report on Form 10-K for the year
ended December 31, 2010, filed on March 3, 2011, for the relevant assumptions used to determine the
valuation of the Corporation’s option awards.

The amounts reported for Dr. Vinciarelli include options granted in 2010 with performance-based vesting
provisions tied to achievement of certain margin targets by the V*I Chip Business Unit, as the Corporation
determined that it is probable that the margin targets could be achieved. The amounts reported for
Messrs. Simms, Kelleher and Zengilowski exclude options granted in 2010 with performance-based vesting
provisions tied to achievement of certain quarterly revenue targets by the Brick Business Unit, as the
Corporation determined that it is not yet probable that the revenue targets could be achieved. Had these
amounts been included, they would be as follows:

James A. Simms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $313,160
626,321
Barry Kelleher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
313,160
Richard E. Zengilowski . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

The amounts reported under “Option Awards” shown for Messrs. Simms and Kelleher, as well as
Mr. Tuozzolo, also include options granted as compensation for their service on the Corporation’s Board
of Directors.

(3) “All Other Compensation” amounts include car allowance, gasoline allowance, supplemental health, dental
and vision insurance, the taxable portion of life insurance benefits, and the Corporation’s matching 401(k)
plan contribution for each employee shown. Dr. Vinciarelli’s car allowance is $10,800, while all other
amounts are individually below the threshold for individual disclosure.

Base Salary

Base salaries for the Corporation’s executive officers are based on the Corporation’s operating performance
relative to comparable peer companies within certain survey information. In setting base salaries for fiscal 2010,
national and local executive salary survey data for executive officers with comparable qualifications, experience
and responsibilities at selected peer companies was evaluated to determine an appropriate range for merit
increases. Each year such merit increase data is presented to the Executive Compensation Committee and Chief
Executive Officer for approval.

Bonus

Outstanding accomplishments or the achievement of certain specific goals is rewarded through discretion-

ary cash bonus payments, determined by the Chief Executive Officer and approved by the Executive
Compensation Committee. During 2008, Mr. Simms earned a discretionary cash bonus of $50,000 that was
paid in 2009. During 2009, discretionary cash bonus payments, ranging from $10,000 to $25,000, were paid to
certain corporate and business unit vice presidents.

14

Stock Option and Equity Incentive Programs

Because of the direct relationship between the value of an option and the market price of the

Corporation’s common stock, the Board considers the granting of stock options to be an effective method of
motivating executive officers to manage the Corporation in a manner consistent with the interests of the
Corporation and its Stockholders.

The Executive Compensation Committee approves stock options grants to executive officers and key
employees. There is no set formula for the granting of discretionary option awards to individual executive
officers or employees. Stock options also are granted to certain employees upon their employment. Grants to
newly hired employees are effective on the first business day of the month following employment, following
the approval by the Executive Compensation Committee.

In 2010, both performance and non-performance based options for the purchase of Vicor Corporation

common stock were granted under the Vicor 2000 Plan. The exercise price of stock options for the purchase
of the Corporation’s common stock is generally set at the closing price of the Corporation’s common stock on
The NASDAQ Stock Market, LLC (“NASDAQ”) on the effective date of the grant. In certain circumstances,
the exercise price may be set at a higher level to provide for additional performance incentives. The non-
performance based grants generally vest over various periods of up to five years and may be exercised for up
to 10 years from the date of grant, which is the maximum contractual term. The performance-based grants
vest upon the achievement of certain quarterly revenue targets by the Brick Business Unit, and may also be
exercised for up to 10 years from the date of grant. As discussed in the Directors’ Compensation section, stock
options are granted to all Directors, with the exception of Dr. Vinciarelli, on the date of the Annual Meeting,
in accordance with the terms of the Vicor 2000 Plan.

During 2010, both performance and non-performance based options for the purchase of V*I Chip
Corporation (“V*I Chip”) common stock were granted under the 2007 V*I Chip Plan. During 2008, non-
performance based options for the purchase of V*I Chip common stock were granted to certain employees of
that subsidiary under the 2007 V*I Chip Plan. All grants were reviewed and approved by the V*I Chip Board
of Directors and the Executive Compensation Committee. There were no stock options granted under the 2007
V*I Chip Plan in 2009. There is no set formula for the granting of discretionary option awards to individual
executive officers or employees of V*I Chip. The non-performance based grants have a five year vesting
schedule and may be exercised for up to 10 years from the date of grant, which is the maximum contractual
term. The performance-based grants vest upon the achievement of certain margin targets and may also be
exercised for up to 10 years from the date of grant. Grants to new hires are effective on the first business day
of the month following employment. V*I Chip stock options are granted at a price not less than the fair value
of a common share of V*I Chip at the date of grant, as determined by the V*I Chip Board of Directors and
the Executive Compensation Committee.

During 2010 and 2008, non-performance based options for the purchase of Picor Corporation (“Picor”)

common stock were granted under the Picor Corporation Amended 2001 Stock Option and Incentive Plan, as
amended (the “2001 Picor Plan”). All grants were reviewed and approved by the Picor Board of Directors and
the Executive Compensation Committee. There were no stock options granted under the 2001 Picor Plan in
2009. There is no set formula for the granting of discretionary option awards to individual executives or
employees of Picor. These grants have a five year vesting schedule and may be exercised for up to 10 years
from the date of grant, which is the maximum contractual term. Grants to new hires are effective on the first
business day of the month following employment. Picor stock options are granted at a price not less than the
fair value of a common share of Picor at the date of grant, as determined by the Picor Board of Directors and
the Executive Compensation Committee.

15

Equity Compensation Plan Information

The following table sets forth certain aggregated information for the Corporation as December 31, 2010

(the end of the most recently completed fiscal year), regarding equity securities underlying stock option awards
made under the 1993 Stock Option Plan (the “Vicor 1993 Plan”), the 1998 Stock Option and Incentive Plan (the
“Vicor 1998 Plan”) and the Vicor 2000 Plan (collectively the “Vicor Plans”), the 2007 V*I Chip Plan and 2001
Picor Plan. All equity compensation plans of the Corporation have been approved by its stockholders.

Number of Securities to
be Issued Upon Exercise
of Outstanding Options,
Warrants and Rights
[a]

Weighted-Average
Exercise
Price of Outstanding
Options, Warrants
and Rights

Number of Securities
Remaining Available for
Future Issuance Under
Equity Compensation Plans
(Excluding Securities
Reflected in Column [a])

1,798,327
10,790,250
10,001,763

$13.95
1.00
0.59

1,392,482
39,209,750
69,968,237

Plan Category

Equity compensation plans approved

by security holders:
Vicor Plans . . . . . . . . . . . . . . . . . . .
2007 V*I Chip Plan . . . . . . . . . . . . .
2001 Picor Plan . . . . . . . . . . . . . . . .

Perquisites

All employees who participated in the Corporation’s 401(k) plan received up to $3,675 in matching funds

in 2010. All named executive officers, with the exception of Dr. Vinciarelli, participated in the 401(k) plan
and received matching funds. All employees receive the same health and insurance benefits. In general,
employees pay approximately 30% of the health premium due. In addition to participating in the health plan
offered to all employees, executive officers may also receive supplemental health, dental, vision, and certain
long term care insurance benefits. The Corporation does not provide pension arrangements, post-retirement
health coverage, or similar benefits for its executive officers or employees.

GRANTS OF PLAN-BASED AWARDS FOR FISCAL 2010

All other
Option Awards
Number of
Securities
Underlying
Options
(#)(1)(2)

Exercise
or Base
Price of
Option
Awards
($/Sh)

Grant
Date

Name

Vicor Plans

James A. Simms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
James A. Simms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Claudio Tuozzolo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Barry Kelleher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Barry Kelleher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Barry Kelleher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Richard E. Zengilowski . . . . . . . . . . . . . . . . . . . . . . . . . .

6/24/2010
8/27/2010
6/24/2010
3/12/2010
6/24/2010
8/27/2010
8/27/2010

4,274
50,000
4,274
20,000
4,274
100,000
50,000

2007 V*I Chip Plan

Patrizio Vinciarelli . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
James A. Simms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12/31/2010
12/31/2010

1,500,000
100,000

2001 Picor Plan

James A. Simms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Claudio Tuozzolo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11/1/2010
11/1/2010

200,000
1,329,340

11.70
13.73
11.70
11.80
11.70
13.73
13.73

1.00
1.00

0.57
0.57

16

Grant
Date
Fair
Value of
Option
Awards
($)(3)

14,890
313,160
14,890
122,512
14,890
626,321
313,160

744,450
49,630

60,080
399,333

(1) Options granted on June 24, 2010 as compensation for their service on the Corporation’s Board of

Directors.

(2) The options granted to Messrs. Simms, Kelleher and Zengilowski under the Vicor Plans on August 27,

2010 contain performance-based vesting provisions tied to achievement of certain quarterly revenue targets
by the Brick Business Unit. The options granted to Dr. Vinciarelli under the 2007 V*I Chip Plan on
December 31, 2010 contain performance-based vesting provisions tied to achievement of certain margin
targets by the V*I Chip Business Unit.

(3) Refer to Note 3, “Stock-Based Compensation and Employee Benefit Plans,” in the Notes to Consolidated

Financial Statements included in the Annual Report on Form 10-K for the year ended December 31, 2010,
filed on March 3, 2011, for the relevant assumptions used to determine the valuation of both non
performance-based and performance-based option awards.

OUTSTANDING EQUITY AWARDS AT FISCAL YEAR-END 2010

Option Awards

Vicor Plans

Name

Patrizio Vinciarelli . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
James A. Simms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Claudio Tuozzolo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Barry Kelleher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Richard E. Zengilowski . . . . . . . . . . . . . . . . . . . . . . . . .

Number of
Securities
Underlying
Unexercised
Options
Exercisable
(#)(1)

Number of
Securities
Underlying
Unexercised
Options
Unexercisable
(#)(1)(3)

6,277
—
—
20,000
—
824
—
337
—
20,000
—
—
—
7,500
8,000
—

—
3,623
4,274
30,000
50,000
3,623
4,274
—
3,623
10,000
4,274
20,000
100,000
—
2,000
50,000

Option
Exercise
Price
($)

13.63
6.90
11.70
12.44
13.73
6.90
11.70
35.75
6.90
20.00
11.70
11.80
13.73
19.40
14.07
13.73

Option
Expiration
Date(2)

10/12/2011
6/25/2012
6/24/2013
5/1/2018
8/27/2020
6/25/2012
6/24/2013
1/31/2011
6/25/2012
2/21/2013
6/24/2013
3/12/2020
8/27/2020
9/4/2011
11/1/2016
8/27/2020

(1) Generally, non performance-based stock options become exercisable in five equal annual installments
beginning on the first anniversary of the date of grant. Performance-based options become exercisable
upon the achievement of the performance targets as outlined in the option award.

(2) The expiration date of each non performance-based stock option generally occurs five years after the vest-
ing date of each installment. For performance-based stock options, the time from the vesting date to the
expiration date may vary depending if and when the performance-based vesting target is met.

17

(3) The unexercisable option vesting schedule under the Vicor Plans as of December 31, 2010 is as follows:

Name

Grant Date

Shares

Vest Date

James A. Simms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5/1/2008
5/1/2008
5/1/2008
6/25/2009
6/24/2010
6/24/2010
8/27/2010
Claudio Tuozzolo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6/25/2009
6/24/2010
6/24/2010
Barry Kelleher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2/21/2006
6/25/2009
3/12/2010
3/12/2010
3/12/2010
3/12/2010
3/12/2010
6/24/2010
6/24/2010
8/27/2010
Richard E. Zengilowski . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11/1/2006
8/27/2010

10,000
10,000
10,000
3,623
2,137
2,137
50,000
3,623
2,137
2,137
10,000
3,623
4,000
4,000
4,000
4,000
4,000
2,137
2,137
100,000
2,000
50,000

5/1/2011
5/1/2012
5/1/2013
6/25/2011
6/24/2011
6/24/2012
*
6/25/2011
6/24/2011
6/24/2012
2/21/2011
6/25/2011
3/12/2011
3/12/2012
3/12/2013
3/12/2014
3/12/2015
6/24/2011
6/24/2012
*
11/1/2011
*

* The options granted on August 27, 2010 contain performance-based vesting provisions contingent on the

achievement of certain quarterly revenue targets by the Brick Business Unit. Because the performance-based
vesting provisions have not been met, the Company cannot determine the vest date of these options at this
time.

2007 V*I Chip Plan

Option Awards

Name

Patrizio Vinciarelli . . . . . . . . . . . . . . . . . . . . . .

James A. Simms . . . . . . . . . . . . . . . . . . . . . . .
Barry Kelleher . . . . . . . . . . . . . . . . . . . . . . . . .
Richard E. Zengilowski . . . . . . . . . . . . . . . . . .

Number of
Securities
Underlying
Unexercised
Options
Exercisable
(#)(1)

Number of
Securities
Underlying
Unexercised
Options
Unexercisable
(#)(1)(3)

2,400,000

1,600,000
— 1,500,000
100,000
—
20,000
30,000
20,000
30,000

Option
Exercise
Price
($)

1.00
1.00
1.00
1.00
1.00

Option
Expiration
Date(2)

6/4/2017
12/31/2020
12/31/2020
5/14/2017
5/14/2017

(1) Generally, non performance-based stock options become exercisable in five equal annual installments
beginning on the first anniversary of the date of grant. Performance-based options become exercisable
upon the achievement of the performance targets as outlined in the option award.

(2) The expiration date of each non performance-based stock option generally occurs five years after the vest-
ing date of each installment. For performance-based stock options, the time from the vesting date to the
expiration date may vary depending if and when the performance-based vesting target is met.

18

(3) The unexercisable option vesting schedule under the 2007 V*I Chip Plan as of December 31, 2010 is as

follows:

Name

Grant Date

Shares

Vest Date

Patrizio Vinciarelli

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6/4/2007
6/4/2007
12/31/2010
James A. Simms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12/31/2010
12/31/2010
12/31/2010
12/31/2010
12/31/2010
3/25/2008
3/25/2008
3/25/2008
3/25/2008

Richard E. Zengilowski . . . . . . . . . . . . . . . . . . . . . . . . . . .

Barry Kelleher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

800,000
800,000
1,500,000
20,000
20,000
20,000
20,000
20,000
10,000
10,000
10,000
10,000

6/4/2011
6/4/2012
*
12/31/2011
12/31/2012
12/31/2013
12/31/2014
12/31/2015
5/14/2011
5/14/2012
5/14/2011
5/14/2012

* The options granted to Dr. Vinciarelli on December 31, 2010 contain performance-based vesting provisions

contingent on the achievement of certain margin targets by the V*I Chip Business Unit. Because the
performance-based vesting provisions have not been met, the Company cannot determine the vest date of
these options.

2001 Picor Plan

Option Awards

Name

James A. Simms . . . . . . . . . . . . . . . . . . . . . . . .
Claudio Tuozzolo . . . . . . . . . . . . . . . . . . . . . . .

Number of
Securities
Underlying
Unexercised
Options
Exercisable
(#)(1)

Number of
Securities
Underlying
Unexercised
Options
Unexercisable
(#)(1)(2)

—
200,000
14,340
200,000
600,000
16,000
24,000
120,000
50,000
—

200,000
—
—
—
—
—
—
30,000
75,000
1,329,340

Option
Exercise
Price
($)

0.57
0.25
0.25
0.25
0.75
0.75
0.75
0.88
1.01
0.57

Option
Expiration
Date

11/1/2020
1/2/2012
1/1/2013
3/3/2013
11/3/2013
1/1/2014
8/26/2014
6/5/2016
6/12/2018
11/1/2020

(1) Generally, stock options become exercisable in five equal annual installments beginning on the first anni-

versary of the date of grant.

19

(2) The unexercisable option vesting schedule under the 2001 Picor Plan is as follows as of December 31,

2010:

Name

Grant Date

Shares

Vest Date

Claudio Tuozzolo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

James A. Simms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11/1/2010
11/1/2010
11/1/2010
11/1/2010
11/1/2010
6/5/2006
6/12/2008
6/12/2008
6/12/2008
11/1/2010
11/1/2010
11/1/2010
11/1/2010
11/1/2010

40,000
40,000
40,000
40,000
40,000
30,000
25,000
25,000
25,000
265,868
265,868
265,868
265,868
265,868

11/1/2011
11/1/2012
11/1/2013
11/1/2014
11/1/2015
6/5/2011
6/12/2011
6/12/2012
6/12/2013
11/1/2011
11/1/2012
11/1/2013
11/1/2014
11/1/2015

OPTIONS EXERCISES AND STOCK VESTED FOR FISCAL 2010

Name

Option Awards

Number of
Shares
Acquired on
Exercise(#)

Value Realized on
Exercise($)(1)

James A. Simms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Barry Kelleher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Claudio Tuozzolo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Richard E. Zengilowski . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9,388
15,223
11,826
6,343

79,794
109,724
76,149
43,686

(1) Represents the difference between the exercise price and the fair market value of the common stock on the

date of exercise.

Post-Employment Compensation

Pension Benefits

The Corporation does not provide pension arrangements or post-retirement health coverage for executive

officers or employees. Executive officers are eligible to participate in a 401(k) defined contribution plan. In
any plan year, the Corporation will make a matching contribution equal to 50% of the first 3% of the
participant’s compensation that has been contributed to the plan, up to a maximum matching contribution of
$3,675. All executive officers, with the exception of Dr. Vinciarelli, participated in the 401(k) plan during
fiscal 2010 and received matching contributions.

Nonqualified Deferred Compensation

The Corporation does not provide any nonqualified defined contribution or other deferred compensation

plans.

20

Other Post-Employment Payments

All employees, including executive officers, are employees-at-will and, as such, do not have employment
contracts with the Corporation. Stock options issued under the Vicor 2000 Plan, the 2007 V*I Chip Plan, and
the 2001 Picor Plan carry a change in control provision that automatically accelerates vesting and makes
unvested options fully exercisable. As of December 31, 2010, the intrinsic value of unvested options held by
named executive officers was as follows:

Named Executive Officer

Number of Unvested
Options as of
December 31,
2010(1)

Intrinsic Value of
Unvested Options as of
December 31,
2010

Vicor Plans
James A. Simms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Barry Kelleher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Claudio Tuozzolo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Richard E. Zengilowski . . . . . . . . . . . . . . . . . . . . . . . . . .

87,897
127,897
7,897
52,000

$306,806
413,506
54,506
138,160

(1) Information for the Vicor Plans excludes unvested options with exercise prices exceeding the market value
of the Corporation’s stock as of December 31, 2010. Information for the 2007 V*I Chip Plan and the 2001
Picor Plan is excluded from the table, as all unvested options have exercise prices exceeding the market
value of the Corporation’s stock as of December 31, 2010, and, therefore, the intrinsic value of those
unvested options as of December 31, 2010 is zero.

DIRECTORS COMPENSATION FOR FISCAL 2010

Name(1)

Fees Earned
or Paid in
Cash
($)

Samuel J. Anderson . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jason L. Carlson. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Estia J. Eichten . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Liam K. Griffin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
David T. Riddiford . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

30,000
30,000
30,000
30,000
30,000

Option Awards
($)(2)(3)

Total
($)

14,890
14,890
14,890
14,890
14,890

44,890
44,890
44,890
44,890
44,890

(1) Dr. Vinciarelli has been omitted from this table since he receives no compensation for serving on the

Board. Messrs. Kelleher, Simms and Tuozzolo have been omitted from this table because, as employee
Directors, they receive no fees in addition to their salary for serving on the Board. Their stock option
awards are included in the Summary Compensation Table.

(2) The amounts reported under the column heading “Option Awards” reflect the aggregate grant date fair

value of stock option awards during 2010. These values have been determined under the principles used to
calculate the grant date fair value of equity awards for purposes of the Corporation’s financial statements.
Refer to Note 3, “Stock-Based Compensation and Employee Benefit Plans”, in the Notes to Consolidated
Financial Statements included in the Annual Report on Form 10-K for the year ended December 31, 2010,
filed on March 3, 2011, for the relevant assumptions used to determine the valuation of option awards.

21

(3) The aggregate grant date fair value and aggregate number of stock options awarded and outstanding as of

December 31, 2010 was as follows:

Name

Grant Date
Fair Value of
Stock Options

Number of
Awards
Outstanding

Samuel J. Anderson. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jason L. Carlson . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Estia J. Eichten . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Liam K. Griffin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
David T. Riddiford . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$229,607
82,118
31,911
71,095
31,911

31,521
26,521
11,521
19,274
11,521

$446,642

100,358

Overview of Director Compensation and Procedures

The level of compensation of non-employee Directors is reviewed on an annual basis. To determine how

appropriate the current level of compensation for non-employee Directors is, the Board reviews data from a
number of different sources including:

(cid:129) publicly available data describing director compensation in peer companies;

(cid:129) survey data collected by the human resources department; and

(cid:129) information obtained directly from other companies.

Non-employee Directors are compensated through a combination of cash payments and equity-based
awards. Each non-employee Director receives a quarterly retainer of $7,500 for his services. Expenses incurred
by non-employee Directors in attending board and committee meetings are reimbursed.

Additionally, each Director, other than any Director holding in excess of 10% of the total number of
shares of the capital stock of the Corporation (i.e., Dr. Vinciarelli), receives an annual grant of non-qualified
stock options upon election as a Director following the Annual Meeting of Stockholders under the Vicor 2000
Plan. Currently, the formula to calculate the stock option award is $50,000 divided by the price of a share of
common stock at the close of market as reported on the NASDAQ on the day of the Annual Meeting of
Stockholders. Accordingly, each Director, other than Dr. Vinciarelli, received non-qualified stock options to
purchase up to 4,274 shares of common stock on June 24, 2010 at an exercise price of $11.70 per share. Half
of these options will become exercisable one year after the grant date, while the remainder becomes
exercisable after two years. These options expire three years from the grant date.

Directors who are also employees do not receive cash compensation for service on the Board.

Compensation Committee Report

The Executive Compensation Committee of the Board of Directors of the Corporation (the “Executive

Compensation Committee”) has reviewed and discussed the Compensation Discussion and Analysis (the
“CD&A”) for the year ended December 31, 2010 with management. Based on the reviews and discussions
referred to above, the Executive Compensation Committee recommended to the board that the CD&A be
included in the Proxy Statement for the year ended December 31, 2010, for filing with the SEC.

Submitted by the Executive Compensation Committee

Jason L. Carlson
Estia J. Eichten
Liam K. Griffin
David T. Riddiford

22

Compensation Committee Interlocks and Insider Participation

Messrs. Carlson, Eichten, Griffin, and Riddiford serve on the Executive Compensation Committee.
Messrs. Carlson, Eichten, Griffin, and Riddiford do not serve as executive officers of the Corporation. The
Board is not aware of any compensation committee interlocks or other relationships that would represent a
potential conflict of interest.

Report of the Audit Committee of the Board of Directors

The Audit Committee oversees the Corporation’s financial reporting process on behalf of the Board of
Directors. Management has the primary responsibility for the financial statements and the reporting process
including the systems of internal controls. In fulfilling its oversight responsibilities, the Audit Committee
reviewed the audited financial statements in the Annual Report with management including a discussion of the
quality, not just the acceptability, of the accounting principles, the reasonableness of significant judgments,
and the clarity of disclosures in the financial statements.

The Audit Committee reviewed with the independent registered public accounting firm, which is responsible

for expressing an opinion on the conformity of those audited financial statements with U.S. generally accepted
accounting principles, including a discussion of the quality, not just the acceptability, of the Corporation’s
accounting principles and such other matters as are required to be discussed with the Audit Committee in
accordance with standards established by the Public Company Accounting Oversight Board (“PCAOB”) and
generally accepted auditing standards. In particular, the Audit Committee has discussed with the independent
registered public accounting firm the matters required to be discussed with them under the provision of
Statement on Auditing Standards No. 61 (Codification of Statements on Auditing Standards), as modified or
supplemented. In addition, the Audit Committee has received the written disclosures and the letter from the
independent registered public accounting firm required by PCAOB Rule 3600T, which adopted on an interim
basis Independence Standards Board Standard No. 1 (Independence Discussions with Audit Committees), and has
discussed with the independent registered public accounting firm the auditors’ independence from management
and the Corporation and considered the compatibility of non-audit services with the auditors’ independence.

The Audit Committee discussed with the independent registered public accounting firm the overall scope

and plans for the firm’s annual audit. The Audit Committee meets with the independent registered public
accounting firm, with and without management present, to discuss the results of their periodic examination,
their evaluation of the Corporation’s internal controls over financial reporting, and the overall quality of the
Corporation’s financial reporting. The Audit Committee held eight meetings during fiscal 2010.

In reliance on the reviews and discussions referred to above, the Audit Committee recommended to the

Board of Directors (and the Board approved) that the audited financial statements be included in the
Corporation’s Annual Report on Form 10-K for the year ended December 31, 2010 for filing with the SEC.

Submitted by the Audit Committee:

Jason L. Carlson
Estia J. Eichten
David T. Riddiford

Certain Relationships and Related Transactions

Mr. Anderson, a Director of the Corporation, is the founder, Chairman of the Board, President and Chief

Executive Officer (“CEO”), as well as the majority voting shareholder, of Great Wall Semiconductor
Corporation (“GWS”). GWS and its subsidiary design and sell semiconductors, conduct research and
development activities, develop and license patents, and litigate against those who infringe upon patented
technology. The Corporation’s gross investment in non-voting convertible preferred stock of GWS totaled
$5,000,000 as of December 31, 2010, giving the Corporation an approximately 30% ownership interest in
GWS. The Corporation and GWS are parties to an intellectual property cross-licensing agreement, a license
agreement and two supply agreements under which the Corporation purchases certain components from GWS.

23

Purchases from GWS totaled approximately $5,362,000 in 2010. The Corporation owed GWS approximately
$555,000 for such purchases as of December 31, 2010.

The Corporation accounts for its investment in GWS under the equity method of accounting. The
Corporation has determined that, while GWS is a variable interest entity, the Corporation is not the primary
beneficiary. The key factors in the Corporation’s assessment were that the CEO of GWS has: (i) the power to
direct the activities of GWS that most significantly impact its economic performance, and (ii) has an obligation
to absorb losses or the right to receive benefits from GWS, respectively, that could potentially be significant to
GWS. There was no allocation of equity method income (loss) in 2010 as GWS incurred a net loss for the
year.

The Corporation’s policy and procedures with respect to the review, approval and/or ratification of related

party transactions are set forth in the Corporation’s Audit Committee Charter and, in summary, require the
Audit Committee to review and approve all related party transactions required to be disclosed pursuant to SEC
Regulation S-K, Item 404, and to discuss with management the business rationale for the transactions and
whether appropriate disclosures have been made. The related party transactions described above were subject
to this policy.

SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

Section 16(a) of the Exchange Act requires the Corporation’s executive officers and Directors, and

persons who own more than 10% of a registered class of the Corporation’s equity securities (collectively,
“Insiders”), to file reports of ownership and changes in ownership with the SEC and NASDAQ. Insiders are
required by SEC regulation to furnish the Corporation with copies of all Section 16(a) forms they file. To the
Corporation’s knowledge, based solely on a review of copies of such reports and written representations that
no other reports were required during the fiscal year ended December 31, 2010, all transactions in the
Corporation’s securities that were engaged in by Insiders, and therefore required to be disclosed pursuant to
Section 16(a) of the Exchange Act, were timely reported, except that Mr. Anderson failed to timely file reports
reflecting two transactions. These transactions were subsequently reported.

INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Audit Committee, acting under authorization of the Board of Directors, pursuant to the Audit
Committee Charter, and following the Corporation’s By-Laws, selected Grant Thornton LLP (“GT”) as the
independent registered public accounting firm for the Corporation for the fiscal year ending December 31,
2010. A representative of GT is expected to be present at the Annual Meeting and will be given the
opportunity to make a statement. The representative is expected to be available to respond to appropriate
questions.

The following table summarizes the fees for services rendered by GT for the fiscal years ended

December 31, 2010 and 2009 in each of the following categories:

Audit Fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audit Related Fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tax Fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 862,000
21,000
164,000

$ 914,000
22,000
166,000

Total Fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$1,047,000

$1,102,000

2010

2009

Audit Fees include services provided in connection with the audit of the Corporation’s consolidated
financial statements (including internal control reporting under Section 404 of the Sarbanes-Oxley Act), the
reviews of the Corporation’s quarterly reports on Form 10-Q, assistance with and review of documents filed
with the SEC, statutory audits required internationally, and accounting consultations related to the audited
financial statements and necessary to comply with generally accepted auditing standards in the U.S.

24

Audit-Related Fees include services provided in connection with audits of the Corporation’s employee

benefit plan.

Tax Fees include services provided in connection with tax compliance, tax advice, tax planning, and

assistance with tax audits.

Pursuant to the Audit Committee charter, the Audit Committee must pre-approve all auditing services and
the terms thereof and non-audit services (other than non-audit services prohibited under Section 10A(g) of the
Exchange Act or the applicable rules of the SEC or the PCAOB) to be provided to the Corporation by the
independent registered public accounting firm; provided, however, the pre-approval requirement is waived with
respect to the provision of non-audit services for the Corporation if the “de minimus” provisions of
Section 10A(i)(1)(B) of the Exchange Act are satisfied. Under the charter, the authority to pre-approve non-
audit services may be delegated to one or more members of the Audit Committee, who shall present all
decisions to pre-approve an activity to the full Audit Committee at its first meeting following such decision.
The Audit Committee approved all audit and non-audit services provided to the Corporation by GT for the
fiscal years 2010 and 2009.

STOCKHOLDER PROPOSALS

Stockholder proposals intended to be presented at the 2012 Annual Meeting of Stockholders must be
received by the Corporation on or before January 16, 2012, in order to be considered for inclusion in the
Corporation’s proxy statement. These proposals must also comply with the rules of the SEC governing the
form and content of proposals in order to be included in the Corporation’s proxy statement and form of proxy
and should be directed to: Vicor Corporation, 25 Frontage Road, Andover, Massachusetts 01810, Attention:
Secretary. It is suggested that any Stockholder proposal be transmitted by certified mail, return receipt
requested.

Proxies solicited by the Board of Directors will confer discretionary voting authority with respect to
stockholder proposals, other than proposals to be considered for inclusion in the Corporation’s proxy statement
described above, that the Corporation receives at the above address after April 1, 2012. These proxies will also
confer discretionary voting authority with respect to Stockholder proposals, other than proposals to be
considered for inclusion in the Corporation’s proxy statement described above, that the Corporation receives
on or before April 1, 2012, subject to SEC rules governing the exercise of this authority.

25

(This page intentionally left blank)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Form 10-K

¥

n

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934
For the fiscal year ended December 31, 2010
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
(State or other jurisdiction of
incorporation or organization)
25 Frontage Road, Andover,
Massachusetts
(Address of principal executive offices)

04-2742817
(IRS employer
identification no.)

01810
(Zip code)

Registrant’s telephone number, including area code:
(978) 470-2900
Securities registered pursuant to Section 12(b) of the Act:

Common Stock, $.01 par Value

(Title of Class)

The NASDAQ Stock Market, LLC

(Name of Each Exchange on Which Registered)

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

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities

Act. Yes n

No ¥

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the

Act. Yes n

No ¥

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 ¥

No n

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. ¥

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a
smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company”
in Rule 12b-2 of the Exchange Act. (Check one):
Large Accelerated Filer n Accelerated Filer ¥

Smaller Reporting Company n

Non-accelerated Filer n
(Do not check if a smaller reporting company)

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange

Act). Yes n

No ¥

The aggregate market value of the voting stock held by non-affiliates of the registrant was approximately $246,164,100 as

of June 30, 2010.

On February 28, 2011, there were 30,003,149 shares of Common Stock outstanding and 11,767,052 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 2011 annual meeting of stockholders are
incorporated by reference into Part III.

PART I

In this Annual Report on Form 10-K, unless the context indicates otherwise, references to “Vicor,” “the

Company,” “our company,” “we,” “us,” “our,” and similar references, refer to Vicor Corporation.

This Annual Report on Form 10-K contains forward-looking statements within the meaning of Sec-
tion 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934,
as amended. The words “believes,” “expects,” “anticipates,” “intend,” “estimate,” “plans,” “assumes,” “may,”
“will,” “would,” “should,” “continue,” “prospective,” “project,” and other similar expressions identify forward-
looking statements. Forward-looking statements also include statements regarding: the level of customer orders
and the delivery lead times associated therewith; the derivation of a portion of our sales in each quarter from
orders booked in the same quarter; our plans to invest in research and development and expanded manufactur-
ing capacity; our belief regarding currency risk being mitigated because of limited foreign exchange
fluctuation exposure; our continued success depending in part on its ability to attract and retain qualified
personnel; our belief that cash generated from operations and the total of our cash and cash equivalents and
short-term investments will be sufficient to fund operations for the foreseeable future; our intention regarding
protecting our rights under our patents; and our expectation that no current litigation or claims will have a
material adverse impact on its financial position or results of operations. These statements are based upon our
current expectations and estimates as to the prospective events and circumstances that may or may not be
within our control and as to which there can be no assurance. Actual results could differ materially from those
implied by forward-looking statements as a result of various factors, including our ability to: hire and retain
key personnel; develop and market new products and technologies cost effectively and on a timely basis;
leverage our new technologies in standard products to promote market acceptance of our new approach to
power system architecture; leverage design wins into increased product sales; continue to meet requirements of
key customers and prospects; enter into licensing agreements increasing our market opportunity and acceler-
ating market penetration; realize significant royalties under such licensing agreements; achieve sustainable
bookings rates for our products across both markets and geographies; improve manufacturing and operating
efficiencies; successfully enforce our intellectual property rights; successfully defend outstanding litigation;
and maintain an effective system of internal controls over financial reporting, including our ability to obtain
required financial information for investments on a timely basis, our ability to assess the value of assets,
including illiquid investments, and the accounting therefor. These and other factors that may influence actual
results are described in this Annual Report on Form 10-K, including but not limited to those described under
Part I, Item I — “Business,” under Part I, Item 1A — “Risk Factors,” under Part I, Item 3 — “Legal
Proceedings,” and under Part II, Item 7 — “Management’s Discussion and Analysis of Financial Condition and
Results of Operations”. The discussion of our business contained herein, including the identification and
assessment of factors that may influence actual results, may not be exhaustive. Therefore, the information
presented should be read together with other documents we file with the Securities and Exchange Commission
from time to time, including Forms 10-Q and 8-K, which may supplement, modify, supersede or update the
factors discussed in this Annual Report on Form 10-K. We do not undertake any obligation to update any
forward-looking statements as a result of future events or developments.

ITEM 1. BUSINESS

Overview

We design, develop, manufacture and market modular power components and complete power systems.

Power systems are incorporated into virtually all electronic equipment. In equipment utilizing Alternating
Current (“AC”) voltage from a primary source (for example, a wall outlet), a power system converts AC
voltage into the stable Direct Current (“DC”) voltage necessary to power subsystems and/or individual
applications or “loads”. In many electronic devices, this DC voltage may be further converted to one or more
lower voltages required by a range of loads. In equipment utilizing DC voltage from a primary source (for
example, a generator or battery pack), the initial DC voltage frequently requires further conversion to one or
more lower voltages. Because numerous applications requiring different DC voltages and varied power ratings
may exist within an electronic device, and system power architectures themselves vary, we offer an extensive
range of products and accessories in a myriad of application-specific configurations.

2

Since our founding, our product strategy has been driven by innovations in design, largely enabled by our
focus on the development of differentiated technologies, which often are implemented in proprietary semicon-
ductor circuitry. Many of our products incorporate a high frequency electronic power conversion technology
called zero current / zero voltage switching (“ZCS/ZVS”), which enabled the design of DC-DC converter
modules that were much smaller and more efficient than conventional alternatives. Emphasizing the superior
power density and performance advantages of this technology, our primary product strategy since our founding
has been to offer a comprehensive range of component-level building blocks to configure a power system
specific to a customer’s needs. Since introducing and popularizing the encapsulated “brick” during the 1980s,
our product focus has been on high density DC-DC converters, which provide the isolation, transformation,
regulation, filtering, and/or input protection necessary to power and protect sophisticated electronic loads. A
secondary and highly complementary product strategy has been to incorporate our component-level building
blocks into complete power systems representing turnkey AC-DC and DC-DC solutions for our customers’
power needs.

Our product strategy is now increasingly focused on the next generation of component-level building
block, the V*I ChipTM module, which incorporates our latest advances in ZCS/ZVS technology and other
proprietary power conversion innovations. We believe V*I Chip converters offer unprecedented power
conversion density (i.e., the output power in Watts as a function of the size of the component in cubic inches),
performance (i.e., benchmarks related to the capabilities of the component, such as conversion efficiency), and
flexibility (i.e., the ability of our customers to implement a broad range of possible configurations).

The applications in which these power conversion and power management products are used are in the

higher-performance, higher-power segments of the power systems market, including, in alphabetical order,
aerospace and defense electronics, enterprise and high performance computing, industrial automation, telecom-
munications and networking infrastructure, test and measurement instrumentation, and vehicles and transporta-
tion. Our products are sold worldwide to customers ranging from global original equipment manufacturers
(“OEMs”) and their contract manufacturers to smaller, independent manufacturers of highly specialized
electronic devices.

Our business segments are organized by key product lines:

k Our Brick Business Unit (“BBU”) segment designs, develops, manufactures and markets modular

power converters in two formats: our well-established encapsulated modules , known as bricks, and
our newer line of modular power converters that incorporate our V*I Chip technology into innovative
packaging, which we market as VI BrickTM modules. The BBU also designs, develops, manufactures
and markets a line of “configurable” products, which are complete power supplies assembled using
our modular power components. The BBU includes the operations of our WestcorTM division, which is
focused only on AC-input configurable products, the operations of Vicor Custom PowerTM (previously
known as Vicor Integration ArchitectsTM), which is our turnkey custom power solutions business, and
Vicor Japan Company, Ltd. (“VJCL”), our Japanese subsidiary.

k Our V*I Chip Business Unit (“V*I Chip”) consists of V*I Chip Corporation, a wholly-owned

subsidiary that designs, develops, manufactures and markets a range of advanced power conversion
components, including those that enable our Factorized Power ArchitectureTM (“FPA”). In 2003, we
introduced FPA, a new power system architecture based on an array of proprietary power conversion
innovations building upon our long-standing leadership in the design of power conversion technolo-
gies. We believe FPA provides power system designers enhanced performance at a lower cost than can
be attained with conventional power architectures. In 2010, we introduced two new power converter
products, the PFMTM and the DCMTM, which exploit proprietary V*I Chip power conversion
innovations. The PFM and DCM can be used either as components of FPA or other power system
distribution architectures. As V*I Chip converters and FPA represent innovative alternatives to such
conventional products and architectures, we established a separate business unit to enable the
organizational focus necessary to support early adopters of these disruptive technologies.

k Our Picor Business Unit (“Picor”) consists of Picor Corporation, a majority-owned subsidiary of

Vicor. Picor is a fabless (i.e., it utilizes third parties to manufacture its products) designer, developer,

3

and marketer of high performance integrated circuits and related products for use in a variety of
power system applications. Picor develops these products to be incorporated into Vicor’s products, to
be sold as a complement to our products, or for sale to third parties for separate applications. Much
of the differentiation of our BBU and V*I Chip products has been a result of implementation of our
power conversion innovations in proprietary semiconductor circuitry. Because of the considerable
design expertise embodied in this captive organization and the potential for success as a merchant
vendor of an expanding portfolio of proprietary products, we established Picor as a separate business
unit to enable organizational focus and to facilitate a distinct go-to-market strategy.

Vicor B.V., a wholly-owned subsidiary incorporated in the Netherlands, serves as a European distribution
center. VLT, Inc. is our wholly-owned licensing subsidiary. VICR Securities Corporation is our wholly-owned
subsidiary established to hold certain investment securities.

We are headquartered in Andover, Massachusetts, where our manufacturing facility is located. V*I Chip

Corporation also is headquartered in Andover, Massachusetts. Our Westcor division has a design and assembly
facility in Sunnyvale, California. Our VJCL subsidiary, which is engaged in sales and customer support
activities exclusively for the Japanese market, is located in Tokyo, Japan. Our six Vicor Custom Power
locations are geographically distributed around the United States. We have customer support and engineering
offices, which we call Technical Support Centers, in the United States, the United Kingdom, France, Germany,
Italy, and Hong Kong, China. Picor Corporation is headquartered in North Smithfield, Rhode Island.

All of the above named entities are consolidated in the financial statements presented herein.

We were incorporated in Delaware in 1981, and our common stock was listed on the NASDAQ National

Market System in April 1990 under the ticker symbol of VICR.

We maintain a website with the address www.vicorpower.com and make available free of charge through

this website our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on
Form 8-K, and amendments to these reports filed or furnished pursuant to Section 13(a) or 15(d) of the
Securities Exchange Act of 1934 (the “Exchange Act”), as soon as reasonably practicable after we electroni-
cally file such material with, or furnish such material to, the Securities and Exchange Commission. The
information contained on our website is not a part of, nor incorporated by reference into, this Annual Report
on Form 10-K and shall not be deemed “filed” under the Exchange Act.

Market Background, Product Trends and Vicor Strategy

The market for power supplies and their enabling components continues to evolve in response to

advancing technologies and corresponding changes in customer requirements. Similarly, we evolved our
strategy to address evolving market challenges and opportunities. Many of the ongoing changes in the market,
particularly in those segments in which we compete, have been characterized by improvement in product
performance (e.g., power conversion efficiency), reduction in product form factor (i.e., size), and increased
design flexibility (i.e., the ability of customers to address their power requirements with a broad range of
alternative solutions). Product trends have been characterized by the disaggregation of the functions of power
components such as DC-DC converters, thereby driving further improvement in overall power supply
performance, further reduction in form factor, and greater flexibility in the way designers implement power
supply solutions.

In 1984, we introduced an enhancement of the standardized, high-density power converter to the market: the
fully-encapsulated brick, utilizing our ZCS/ZVS technology, in standardized dimensions of 4.6” x 2.4” x 0.5”. Our
innovative, patented technology provided superior efficiency and overall performance in a small form factor, while
full encapsulation provided not only full shielding from environmental influences, but enhanced thermal perfor-
mance characteristics. Such thermal performance enhancement has been critical to the differentiated performance
of our power converters, as the by-product of voltage conversion is heat, which must be dissipated in order to
assure the performance of the converter itself and the overall system to which it is delivering power.

In response to market and technology trends and changes in our customer requirements, we have
implemented a strategy addressing both the realities of the current power conversion marketplace and our

4

vision of the long-term direction of that marketplace. Our strategy involves maintaining a viable, profitable
legacy business, while investing in the next generation of power management components.

Our early technical and performance leadership contributed to the development of an image in the market
as a power component innovator. The BBU experienced strong revenue growth and robust profitability during
the 1980s and 1990s, as important markets for our products expanded. However, a significant amount of our
revenue was derived from the telecommunications infrastructure market and, when that market collapsed in the
early 2000s, we had to reassess our product portfolio and overall competitive positioning. Many of our
domestic competitors faced the same circumstances and reoriented their strategies to serve high volume
applications of large OEMs. In doing so, they moved much of their manufacturing from the United States to
lower cost countries where the contract manufacturers used by their OEM customers were based. We chose not
to follow these competitors, remained a domestic manufacturer, and shifted our competitive positioning to one
based on “mass customization”, thereby offering customers a wider range of possible solutions than those
offered by our competitors.

As a part of our repositioning, we invested significantly in new product designs that emphasized low cost

and flexible manufacturing, as well as the plant equipment and information technology necessary to support
such low cost and flexible manufacturing, as well as shorter delivery lead times. We also modified our
go-to-market strategy to emphasize serving lower volume customers requiring higher value solutions. As such,
today our product portfolio is extremely broad, while our customer base and the market segments we serve are
far more diverse than prior to the change in our go-to-market strategy. Our mass customization model allows
us to profitably meet the specific design and volume requirements of numerous, relatively low volume
customers, while avoiding the costs associated with maintaining extensive inventories of finished goods. Our
decision to not pursue higher volume commodity opportunities constrained our growth during the economic
recovery from 2004 into 2008, but our profitability during this period benefited from our value-added
approach. We believe this approach has contributed to reduced volatility of our financial performance during
the current period of economic decline, as our customers rely on us for power conversion solutions they
generally cannot obtain from our volume-oriented, commodity-focused competitors.

At the same time we undertook a repositioning of the BBU, our legacy business, we announced our vision

for the future of component-based power conversion: FPA and V*I Chip modules. Since our founding, our
products have been based on advanced, highly-differentiated designs. Much of our intellectual property is
patented or otherwise proprietary to us. However, as is typical across the information technology and
electronics markets, the segments in which we have competed matured relatively quickly and became
characterized by product commoditization and price competition. Given our extensive experience with power
conversion technologies and our understanding of trends in both technology and our markets, we concluded
the appropriate complement to maintaining our legacy business would be to seek to redefine the competitive
landscape in the long-term in targeted market segments with our innovative, flexible new power distribution
architecture and our next generation of advanced designs appropriate for applications requiring highly
differentiated performance (i.e., conversion efficiency) and power density.

Picor is a highly complementary element of our strategy to redefine the competitive landscape in the long

term. Many of the differentiated capabilities of our Brick and V*I Chip products have been a result of
implementation of our power conversion innovations in proprietary semiconductor circuitry. Most notably,
proprietary, highly advanced microcontroller circuits are found in many of our most successful switching
power components. While the majority of Picor’s activities to date have involved supplying integrated circuits
for internal use, Picor’s strategy is to become a merchant vendor of innovative power management circuitry,
whether in individual packages, multi-chip modules, or subassemblies. Picor’s product roadmap includes the
development of integrated power management products targeted at lower power applications. As such, Picor’s
current and planned products represent a complement to FPA and V*I Chip modules.

An important element of our strategy is to protect our competitive leadership with domestic and foreign
patents and patent applications that cover our products and much of their enabling technologies. We believe
our competitive leadership is further protected by proprietary trade secrets associated with our use of certain

5

components and materials of our own design, as well as our significant experience with manufacturing,
packaging and testing these complex devices.

We continue to believe traditional power architectures, in the longer run, may not provide the performance

necessary to address future power system requirements, given the trends toward lower bus and load voltages,
higher currents, more and diverse on-board voltages, and the higher speeds and performance demands of
numerous complex loads. Our overall strategy is to develop differentiated products to address these trends,
while providing competitively superior performance and reliability at a lower overall cost.

Our Products

Our website, www.vicorpower.com, sets forth detailed information describing all of products and the

applications for which they may be used. The information contained on our website is not a part of, nor
incorporated by reference into, this Annual Report on Form 10-K and shall not be deemed “filed” under the
Exchange Act.

Our principal product lines are:

Bricks: Modular Power Converters

Brick DC-DC power converters are well-established as an important enabling component of conventional

power systems architectures. The BBU currently offers seven families of high power density, component-
level DC-DC power converters: the VI-200TM, VI-J00TM, MI-200TM, MI-J00TM, Maxi, Mini and Micro families.
Designed to be mounted directly on a printed circuit board chassis using contemporary manufacturing
processes, each brick family is a comprehensive set of products offered in a wide range of input voltage (10 to
425 Volts DC) and output power (10 to 600 Watts). This allows end users to select power component products
appropriate to their individual applications. The product families differ in maximum power ratings, perfor-
mance characteristics, package size and, in certain cases, characteristics specific to the targeted market.

All of our traditional brick modules are encapsulated with a dielectric, elastomeric, thermally conductive

material, thereby providing electrical insulation, thermal conductivity, and environmental protection of the
electronic circuitry.

Our Custom Module Design SystemTM (“CMDS”), a core component of the Vicor PowerBenchTM tool
suite on our website, is a proprietary system enabling our customers to specify on-line, and verify in real time,
the performance and attributes of its DC-DC converters. Not merely a product configuration tool like those
offered by competitors, the CMDS enables the comprehensive design of DC-DC converters in all of our
established brick form factors (i.e., full, half and quarter size), using patented web-based technology. CMDS is
an important element of our mass customization strategy.

The VI Brick combines the superior technical attributes of our V*I Chip technology with robust

packaging offering superior thermal characteristics and facilitating a range of board mounting alternatives. VI
Brick models include high current density / low voltage DC-DC converters, a wide range of highly efficient
bus converters, and individual models for both regulation and transformation. We continue to focus our
product development efforts within the BBU on the design of VI Brick modules. During 2010, we introduced
the VI Brick PFMTM, an innovative AC-DC converter using V*I Chip technology. The module incorporates
active power factor correction and operates over a wide rectified AC input voltage range providing a regulated
and isolated 48 Volt direct current output at up to 330 Watts. The high efficiency (93%) of the module and its
thermally adept VI Brick package provide a flexible AC to DC power component.

Accessory Power System Components

Accessory power system components, used with our component-level power converters, integrate other
important functions of the power system, facilitating the design of complete power systems by interconnecting
several modules. These other functions include input filtering, power factor correction, transient protection and
AC line rectification. In general, our broad line of proprietary accessory components are used to condition

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and/or filter the input and output voltages of the modular power components, and therefore represents an
important complement to our converter component lines.

Examples of accessory products include our VI-HAMTM (Harmonic Attenuator Module), a universal-AC-
input, power-factor-correcting front end for use with compatible DC-DC power converters, and our VI-AIMTM
(AC Input Module), which provides input filtering, transient protection and rectification of the AC line.

Configurable Products

Utilizing our modular power components as core elements, we have developed several configurable
product families that provide complete power solutions configured to a customer’s specific needs. These
products exploit the benefits and flexibility of the modular approach to offer higher performance, higher power
densities, lower costs, and faster delivery than many competitive offerings. Configurable products are designed,
developed and manufactured by the BBU, which offers a range of AC-DC and DC-DC products, by its
Westcor division, which focuses on high-power AC-DC power supplies, and by VJCL, which offers
configurable power supplies addressing the specific requirements of Japanese customers.

Most information technology, process control, and industrial electronic products operate directly off of

AC lines and, as such, require circuitry to convert AC line voltage into the required DC voltage. Our
configurable AC-DC power systems, the FlatPACTM, VIPACTM Power System, and LoPACTM families, incorpo-
rate front-end AC-DC circuitry subassemblies, thereby providing a complete power solution from AC line
input to one or more DC outputs. These configurable products are characterized by their low-profile design
and are configurable in a range of sizes and outputs up to 1,500 Watts.

Many telecommunications switching, transportation and defense electronic products are powered from

central DC sources (e.g., generators or banks of batteries). Our configurable DC-DC power systems, the
VIPAC Array, ComPACTM, and MegaModTM families, also are characterized by a low-profile design, including
rugged, compact assemblies for chassis-mounted, bulk power applications.

Our highest power configurable product line, the MegaPACTM family, is also among our most flexible

solutions. A MegaPAC consists of a fan-cooled chassis with up to 10 slots into which are placed
ConverterPACTM modules, which incorporate our brick power conversion modules, allowing for a broad range
of customer-specific configurations. The MegaPAC itself can be configured to accept either AC or DC inputs,
and output power can be as high as 4,000 Watts with up to 20 outputs.

The VIPAC family of power systems is a class of user defined, integrated modular power solution that
leverages the latest advances in Maxi, Mini, and Micro DC-DC converter technology and modular front ends.
VIPAC combines application specific front end units, a choice of advantageous chassis styles and, in AC input
versions, remotely located hold-up capacitors to provide fast, flexible and highly reliable power solutions for a
wide range of demanding applications.

The web-based Vicor Computer Assisted Design (“VCAD”) tool, a component of Vicor PowerBench, can

be utilized by the customer to specify and verify, in real time, that customer’s desired configuration of our
VIPAC family of configurable products from a broad range of inputs, outputs, packaging and optional features.
Similarly, our web-based Vicor System Product Online Configurator (“VSPOC”), also a component of Vicor
PowerBench, allows customers to configure and order Westcor AC-DC power supplies.

Customer Specific Power System Products

Certain customers rely on us to design, develop and manufacture customized power systems to meet
performance and/or form factor requirements that cannot be met with off-the-shelf system solutions. By
utilizing our power components as building-blocks in developing these custom power systems, we have been
able to meet such customers’ needs with reliable, high power density, turnkey solutions. These low-volume,
high value-add products, besides meeting customers’ specific requirements, frequently are designed to function
reliably in the harsh environments associated with aerospace and defense applications.

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We pursue custom opportunities through our Vicor Custom Power network, which consists of six regional

design, assembly and customer support locations. Of the six locations, one is a division, three are either
wholly-owned or majority-owned subsidiaries, and two are less than 50%-owned subsidiaries.

V*I Chip Products

We have pioneered an innovative new board level power architecture, FPA, which separates (or

“factorizes”) the basic functions of DC-DC power conversion (voltage transformation, regulation, and
isolation) into separate power components called V*I Chip modules. Our V*I Chip converters represent the
next generation of modular power components, providing power systems designers the ability to address
increasingly challenging requirements. With each new generation of microprocessor, application specific
integrated circuit, and memory, the trend has been toward lower voltages, higher currents, higher speeds and
more on-board voltages. System designers must contend with a range of lower voltages, improve overall power
system efficiency, and deliver the solution in an ever-smaller form factor.

We believe FPA provides power system designers superior power density, conversion efficiency, transient
responsiveness, noise performance, reliability, and design flexibility at a lower overall cost than attained with
conventional board level power architectures. We currently offer three V*I Chip modules for implementation
of FPA designs: the BCMTM (Bus Converter Module), an intermediate bus converter; the PRMTM (Pre-Regulator
Module), a non-isolated regulator; and the VTMTM (Voltage Transformation Module), an isolated current
multiplier. All three modules are offered in full (i.e., 1.1 square inch) and half (i.e., 0.57 square inch) modules.

The BCM provides an isolated, unregulated intermediate bus voltage, at efficiencies up to 96%, to power
non-isolated converters at the point-of-load from a narrow range DC input. The PRM is a non-isolated regulator,
operating at up to 97% efficiency, capable of both boosting (i.e., increasing) and bucking (i.e., reducing) an input
voltage and providing a regulated, adjustable output voltage or “factorized bus”. VTMs are designed to meet the
demands of advanced microprocessor and memory applications at the point of load with fixed ratio voltage
transformation with extremely fast transient response, while providing isolation from input to output.

We have successfully deployed V*I Chip modules in FPA implementations in several demanding
application categories for which they are well suited, including high performance computing, advanced test
and measurement, and defense electronics.

As addressed above in the context of its use in a VI Brick product, in 2010 V*I Chip introduced the PFM

converter, an isolated AC-DC module offering active PFC. The PFM has dimensions of 1.92” x 1.91” x 0.37”
(approximately twice size of a full size BCM, PRM or VTM module).

Picor Products

Picor designs, develops, and markets high performance integrated circuits and related products for use in

a variety of power system applications. Picor is pursuing a merchant strategy and offers a growing range of
products for sale to third parties.

In 2010, Picor introduced the Cool-PowerTM module, a DC-DC converter delivering 60 Watts of output power

in half the size of competitive solutions. Picor’s product portfolio includes a range of Cool-ORingTM full-function
Active ORing solutions and discrete Active ORing controllers. These solutions address the requirements of
redundant power architectures implemented in today’s high-availability systems such as enterprise servers, high
performance computing, and telecom and communications infrastructure systems. Picor also offers a range of
QuietPowerTM output (QPO) and input (QPI) electromagnetic interference filters differentiated by their small, surface
mount System-in-Package and low cost. Products are targeted at a range of industry and customer applications.

MIL-COTS Products

We offer versions of our commercial-off-the-shelf brick converters and accessories, configurable power

supplies, and V*I Chip converters meeting certain specification standards established by the U.S. Department
of Defense. Such “MIL-COTS” products meet the performance and reliability requirements associated with
use in harsh and demanding environments.

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Sales and Marketing

We sell our products in North America and South America through a network of independent sales
representative organizations and in other areas of the world through independent distributors. Sales activities
are managed by a staff of Area Sales Directors, Regional and National Account Sales Managers, and sales
personnel in the following locations: our world headquarters in Andover, Massachusetts; a Technical Support
Center in Lombard, Illinois; our Westcor division in Sunnyvale, California; Vicor Custom Power locations in
Cedar Park (Austin), Texas, Milwaukie (Portland), Oregon, and Oceanside (San Diego), California; our
subsidiary in Tokyo, Japan; and our Technical Support Centers in Munich, Germany, Camberley, Surrey,
England, Milan, Italy, Paris, France, and Hong Kong, China.

International sales, as a percentage of total net revenues, were approximately 49% in 2010, 41% in 2009,

and 42% in 2008, respectively.

Because of the technically complex nature of our products, we maintain a staff of Field Applications

Engineers to support our sales activities. Field Application Engineers provide direct technical sales support
worldwide by reviewing new applications and technical matters with existing and potential customers. Product
Line Engineers, located in our Andover headquarters, support field application engineers assigned to all of our
locations.

We generally warrant our products for a period of two years.

During 2010, we introduced an electronic commerce capability through our website, www.vicorpower.-

com. Registered customers in the U.S., Canada and certain European countries are now able to purchase
prototype quantities of selected products online. We intend to expand our online capability in the near future
to include customers from other countries.

We also sell directly to customers through Vicor ExpressTM, an in-house distribution group. Through

advertising and periodic mailing of its catalogs, Vicor Express generally offers customers rapid delivery on
small quantities of certain standard products. Through Vicor B.V., Vicor Express operates in Germany, France,
Italy and England.

Applications and Customers

The applications in which our power conversion and power management products are used are in the
higher-performance, higher-power segments of the power systems market. Our products are sold worldwide to
customers ranging from global OEMs and their contract manufacturers to smaller, independent manufacturers
of highly specialized electronic devices. For the years ended December 31, 2010, two customers accounted for
approximately 12.3% and 11.5% of net revenues, respectively. During 2009 and 2008, no single customer
accounted for more than 10% of our net revenues.

Backlog

As of December 31, 2010, we had a backlog of approximately $78,900,000 compared to $57,200,000 on
December 31, 2009. Backlog is comprised of orders for products for which shipment is scheduled within the
next 12 months. A portion of our sales in any quarter is, and will continue to be, derived from orders booked
in the same quarter.

Research and Development

As a basic element of our long-term strategy, we are committed to the continued advancement of power
conversion technology and power component product development. We invested approximately $36,000,000,
$31,600,000, and $31,400,000 in research and development in 2010, 2009, and 2008, respectively. Investment
in research and development represented approximately 14.4%, 16.0%, and 15.3% of net revenues in 2010,
2009, and 2008, respectively. We intend to continue to invest a significant percentage of revenues in research
and development activities.

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Manufacturing and Quality Assurance

Our 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 environmental stress screening of certain products and product
test using automatic test equipment.

We continue to pursue a manufacturing strategy based upon the phased acquisition and/or fabrication,

qualification and integration of automated manufacturing equipment to reduce manufacturing costs, increase
product quality and reliability and enable rapid and effective expansion of capacity, as needed. We intend to
make continuing investments in manufacturing equipment, particularly for our V*I Chip and VI Brick products
and replacement of manufacturing equipment utilized by the BBU.

Components and materials used in our products are purchased from a variety of vendors. Most of the
components are available from multiple sources. In instances of single source items, we maintain levels of
inventories we consider to be appropriate to enable meeting the delivery requirements of customers. Incoming
components, assemblies and other parts are subjected to several levels of inspection procedures.

Our compliance with applicable environmental laws has not had a material effect on our financial

condition or operating results.

Product quality and reliability are a critical to our success and, as such, we emphasize quality and
reliability in our design and manufacturing activities. We follow industry best practices in manufacturing and
are compliant with ISO 9001 certification standards (as set forth by the International Organization for
Standardization). Our quality assurance practices include rigorous testing and, as necessary, burn-in of our
products using automated equipment.

Competition

The power conversion industry is highly competitive. It remains highly fragmented, despite significant

consolidation during the prior decade. Numerous power supply manufacturers target market segments and
applications similar to those we target. Several of these competitors have significantly greater financial and
marketing resources and longer operating histories than we do.

With the BBU, our strategy is largely based on differentiated responsiveness to customer requirements
enabled by our mass customization capabilities. We believe we have a strong competitive position, particularly
with customers who need small, high density power system solutions requiring a variety of input-output
configurations. We compete on the basis of differentiation, offering a broad product line and mass
customization abilities. We also compete by emphasizing technical innovation, product performance, and
service and technical support. We believe the principal competitive variables in the market segments in which
the BBU competes are price, performance, and the level of service and technical support offered.

With V*I Chip, our strategy is largely based on differentiated products offered to, at least during the early

adoption of such products, a limited number of larger potential customers well-positioned to benefit from the
advantages offered by our products (e.g., global original equipment manufacturers in computing, networking,
and test and measurement). V*I Chip currently competes with vendors of power component solutions, many of
which are the manufacturers with which the BBU competes. In the coming years, we anticipate a significantly
broadened market for V*I Chip, as awareness of the advantages of V*I Chip spreads and a broader audience
of potential customers is reached. We also anticipate the introduction of the PFM and DCM concepts will
accelerate adoption of our broadened V*I Chip product line, as we will be well-positioned to offer
comprehensive AC-DC and DC-DC solutions across a wider range of applications.

Picor and, to a lesser extent, V*I Chip compete with suppliers of integrated circuits for power conversion
applications, many of which have significantly greater financial and marketing resources and longer operating
histories. We believe Picor is developing a strong competitive position based on innovative semiconductor
design and PSiP packaging. Based on Picor’s expanding product roadmap, we anticipate Picor will experience

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more direct competition with these larger suppliers, as we target their customers with our increasingly silicon-
centric power conversion solutions.

Patents and Intellectual Property

We believe our patents afford advantages by building fundamental and multilayered barriers to competi-
tive encroachment upon key features and performance benefits of our principal product families. Our patents
cover the fundamental conversion topologies used to achieve the performance attributes of our converter
product lines; converter array architectures; product packaging design; product construction; high frequency
magnetic structures; as well as automated equipment and methods for circuit and product assembly.

We have been issued 129 patents in the United States (which expire between 2010 and 2026). We also

have a number of patent applications pending in the United States, Europe and the Far East. We intend to
vigorously protect our rights under these patents. Although we believe patents are an effective way of
protecting our technology, there can be no assurances that our patents will prove to be enforceable.

Licensing

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

Employees

As of December 31, 2010, we had approximately 1,002 full time employees and 68 part time employees.

We believe our continued success depends, in part, on our ability to attract and retain qualified personnel.

Although there is strong demand for qualified personnel, we have not to date experienced difficulty in
attracting and retaining sufficient engineering and technical personnel to meet our needs (see Part I,
Item 1A — “Risk Factors”).

None of our employees are subject to a collective bargaining agreement.

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ITEM 1A. RISK FACTORS

This Annual Report on Form 10-K contains forward-looking statements within the meaning of Sec-
tion 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.

Our future operating results are difficult to predict and are subject to fluctuations.

Our future operating results, including revenues, gross margins, operating expenses and net income (loss),

have fluctuated on a quarterly and annual basis, are difficult to predict, and may be materially affected by a
number of factors, many of which are beyond our control, including:

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the effects of adverse economic conditions in the United States and international markets, especially
in light of the continued challenges in global credit and financial markets;

changes in customer demand for our products and for end products that incorporate our products;

the timing of our new product announcements or introductions, as well as those by our competitors;

our ability to effectively coordinate changes in the mix of products we manufacture and sell, while
managing our ongoing transition in organizational focus from traditional brick power components to
our new V*I Chip, VI Brick and Picor products;

the level of demand and purchase orders from our customers, and our ability to adjust to changes in
demand and purchase order patterns;

changes in order lead times and our “turns” volumes (i.e., the volumes of purchase orders received
and shipped within an individual quarter);

the timing, delay or cancellation of significant customer orders and our ability to manage inventory;

the ability of our third party suppliers, subcontractors and manufactures to supply us with sufficient
quantities of high quality products or components, on a timely basis;

the effectiveness of our efforts to reduce product costs and manage operating expenses;

our ability to utilize our manufacturing facilities at efficient levels, maintaining production capacity
and manufacturing yields;

the ability to hire, retain and motivate qualified employees to meet the demands of our customers;

intellectual property disputes;

potential significant litigation-related costs;

costs related to compliance with increasing worldwide environmental and other regulations; and

the effects of public health emergencies, natural disasters, security risk, terrorist activities, interna-
tional conflicts and other events beyond our control.

As a result of these and other factors, we cannot assure you that we will not experience significant
fluctuations in future operating results on a quarterly or annual basis. In addition, if our operating results do
not meet the expectations of investors, the market price of our common stock may decline.

Our stock price has been volatile and may fluctuate in the future.

The trading price of our common stock has and may continue to fluctuate significantly. Such fluctuations

may be influenced by many factors, including:

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the recent unprecedented volatility of the financial markets;

uncertainty regarding the prospects of domestic and foreign economies;

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uncertainty regarding domestic and international political conditions, including tax policies;

our performance and prospects;

the performance and prospects of our major customers;

investor perception of our company and the industry in which we operate;

the absence of earnings estimates and supporting research by investment analysts;

the liquidity of the market for our common stock;

the uncertainty of the declaration and payment of future cash dividends on our common stock; and

the concentration of ownership of our common stock by Dr. Vinciarelli, our Chairman of the Board,
Chief Executive Officer, and President.

Public stock markets have recently experienced extreme price and trading volume volatility. This volatility

significantly and negatively affected the market prices of securities of many technology companies, including
the market price of our common stock in late 2008 and early 2009. The return of such volatility could result
in broad market fluctuations that could materially and adversely affect the market price of our common stock
for indefinite periods. In addition, fluctuations in our stock price, volume of shares traded, and changes in our
trading multiples may make our stock attractive to certain categories of investors who often shift funds into
and out of stocks rapidly, exacerbating price fluctuations in either direction.

The ownership of our common stock is concentrated between Dr. Vinciarelli and a limited number of
institutional investors. Dr. Vinciarelli owned, as of December 31, 2010, 9,675,480 shares of our common stock,
as well as 11,023,648 shares of our Class B common stock (convertible on a one-for-one basis into common
stock), together representing 50.5% of total issued and outstanding shares. Certain institutional investors have
been long-term owners of our common stock and held in aggregate, as of September 30, 2010 (the most recent
reporting date for institutional holders), over 15% of our issued and outstanding shares. Accordingly, the
market float for our common stock and average daily trading volumes are relatively small, which can
negatively impact investors’ ability to buy or sell shares of our common stock in a timely manner.

We do not actively communicate with investment analysts and, as a consequence, there are no earnings

estimates or supporting research coverage of our company. Because operating results have fluctuated on a
quarterly and annual basis, investors may have difficulty in assessing our current and future performance.

In the past, we have declared and paid cash dividends on our common stock. The payment of dividends is

based on the periodic determination by the Board of Directors that we have adequate capital to fund
anticipated operating requirements and that excess cash is available for distribution to shareholders via a
dividend. We have no formal policy regarding dividends and, as such, investors cannot make assumptions
regarding the possibility of future dividend payments nor the amounts and timing thereof.

Dr. Vinciarelli owns 93.7% of our issued and outstanding Class B shares, which possess 10 votes per

share. (Dr. Estia J. Eichten, a member of our Board of Directors, owns the balance of Class B shares issued
and outstanding.) As such, Dr. Vinciarelli, controlling in aggregate 81.3% of share voting power, has effective
control of the governance of the Company.

The ongoing disruptions in the global economy, as well as continued uncertainty in global financial
markets, could materially and adversely affect our business and results of operations.

While global credit and financial markets appear to be recovering from extreme disruptions experienced

over the past two years, uncertainty about continuing economic stability remains. Global financial markets
continue to experience disruptions, including diminished liquidity and credit availability. In particular, the
recent European debt crisis and related financial restructuring efforts has contributed to the instability in global
credit markets. Further disruption and deterioration in economic conditions may reduce customer purchases of
our products, thereby reducing our revenues and earnings. In addition, such adverse conditions may, among
other things, result in increased price competition for our products, increased risk of excess and obsolete

13

inventories, increased risk in the collectability of our accounts receivable from our customers, increased risk in
potential reserves for doubtful accounts and write-offs of accounts receivable, and higher operating costs as a
percentage of revenues. The recent debt crisis in certain European countries could cause the value of the Euro
to deteriorate, thus reducing the purchasing power of our European customers. Any of these items individually,
or in combination, could materially and adversely affect our business and the results of operations. In 2009,
we took actions to address the effects of the economic crisis, including a reduction in force and the
implementation of cost control and reduction efforts. While these actions contributed to the positive operating
results in 2010, it is possible that we may need to take further cost control and reduction efforts if economic
conditions deteriorate again.

We compete with many companies possessing far greater resources.

Some of our competitors have greater financial, manufacturing, technical, sales and marketing resources
than we have. We compete with domestic and foreign manufacturers of integrated power supplies and power
conversion components. With the growth of our V*I Chip and Picor product lines, we increasingly are
competing with global manufacturers of power management products. Competition is generally based on
design and quality of products, product performance, features and functionality, and product pricing, availabil-
ity and capacity, with the relative importance of these factors varying among products, markets and customers.
Existing or new competitors may develop products or technologies that more effectively address the demands
of our customers and markets with enhanced performance, features and functionality or lower cost. If we fail
to continue to develop and commercialize leading-edge technologies and products that are cost effective and
maintain high standards of quality, and introduce them to the market on a timely basis, our competitive
position and results of operations could be materially adversely affected.

Our future success increasingly depends upon our ability to develop and market differentiated,
leading-edge power conversion products for larger customers, potentially contributing to lengthy product
development and sales cycles that may result in significant expenditures before revenues are generated.

The power system 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 have an adverse effect on our results of operations. We are following a strategy based on
the development of differentiated products addressing what we believe to be the long-term limitations of
traditional power architectures. The development of such new products is often a complex, time-consuming and
costly process involving significant investment in research and development, with no assurance of return on
investment. There can be no assurance we will be able to develop and introduce new and improved products in a
timely or efficient manner or new and improved products, if developed, will achieve market acceptance.

Our future success depends substantially upon customer acceptance of our innovative products. As we have

been in the early stages of market penetration for these products, we have experienced lengthy periods during
which we have focused our product development efforts on the specific requirements of a limited number of
large customers, followed by further periods of delay before meaningful purchase orders are received. These
lengthy development and sales cycle times increases the possibility that a customer may decide to cancel or
change product plans, which could reduce or eliminate our sales to that customer. As a result, we may incur
significant product development expenses, as well as significant sales and marketing expenses, before we
generate the related revenues for these products. Furthermore, we may never generate the anticipated revenues
from a product after incurring such expenses if our customer cancels or changes its product plans.

Our future operating results are dependent on the growth in our customers’ businesses and on our ability
to identify and enter new markets.

We manufacture modular power components and power systems that are incorporated into our customers’

electronic products. Our growth is therefore dependent on the growth in the sales of our customers’ products
as well as the development by our customers of new products. If we fail to anticipate changes in our
customers’ businesses and their changing product needs or successfully identify and enter new markets, our
results of operations and financial position could be negatively impacted. We cannot assure you that the

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markets we serve will grow in the future, that our existing and new products will meet the requirements of
these markets or that we can maintain adequate gross margins or profits in these markets.

In particular, revenue growth in the V*I Chip segment and the Vicor Custom Power group over the last

several years has come from either a limited number of customers or from a limited number of significant
customer programs. A decline in or deferral of demand from one or several of these large customers or the
discontinuation of certain programs, or declines in our other end-user markets in general, could have a material
adverse impact on our results of operations. In 2009 and 2010 several large customers, due to uncertain
conditions in their own businesses, deferred placing purchase orders with us and/or deferred delivery of
scheduled product shipments. As a result, we incurred additional costs associated with managing our inventory
levels and scheduling our production activity. In addition, our increased focus on either a limited number of
customers or a limited number of significant customer programs, as well as our experience with the deferred
purchase orders and/or delivery of certain scheduled product shipments, have contributed to large variances in
our reported quarterly ratio of bookings to billings. Accordingly, comparison of our “book to bill” ratios on a
quarter-to-quarter basis can be misleading and may not accurately represent revenue trends.

We rely on third-party vendors and subcontractors for supply of components and assemblies and,
therefore, cannot control their availability or quality.

We depend on third party vendors and subcontractors to supply components and assemblies used in our
products, some of which are sole-sourced. If suppliers or subcontractors cannot provide their products or services
on time or to our specifications, we may not be able to meet the demand for our products and our delivery times
may be negatively affected. In addition, we cannot directly control the quality of the products and services provided
by third parties. In order to grow, we 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.

We may not be able to procure necessary key components for our products, or we may purchase excess
raw material inventory or unusable inventory, possibly impacting our results of operations.

The power systems industry, and the electronics industry as a whole, can be subject to pronounced business
cycles and otherwise subject to sudden and sharp changes in demand. Our success, in part, is dependent on our
ability to forecast and procure inventories of raw materials and components to match production schedules and
customer delivery requirements. Many of our products, notably V*I Chip modules and Picor PSiPs, require raw
materials and components supplied by a limited number of vendors and, in some instances, a single vendor.
During periods of demand growth, key materials and components required to build our products may become
unavailable in the timeframe required for us to meet our customers’ needs. Our inability to secure sufficient
materials and components to build products for our customers could negatively impact our sales and operating
results. We may choose to mitigate this risk by increasing the levels of inventory for certain raw materials and
components. Such increased inventory levels may increase the potential risk for excess and obsolescence should
our forecasts fail to materialize or if there are negative factors impacting our customers’ end markets, leading to
order cancellation. If we purchase excess inventory or determine certain inventory is unusable, we may have to
record additional inventory reserves or write-off the unneeded inventory, which could have a material adverse
effect on our gross margins and on our results of operations.

Our revenues and profits may not increase enough to offset the expense of additional production
capacity.

We have made significant additions to our manufacturing equipment and capacity over the past several

years, including equipment for both our new V*I Chip products and for BBU products. During 2010, we
added equipment to the V*I Chip production lines that more than doubled production capacity. We have also
replaced certain equipment and added new, more efficient equipment for certain processes on the BBU
production lines. If overall revenue levels do not increase enough to offset the increased fixed costs, or
significant revenues do not materialize for the V*I Chip products, or if there is deterioration in our overall
business, our future operating results could be adversely affected. In addition, asset values could be impaired if
the additional capacity is underutilized for an extended period of time, resulting in impairment charges that
could have a material adverse effect on our financial position and results of operations.

15

If we were unable to use our manufacturing facility in Andover, Massachusetts, we would not be able to
manufacture for an extended period of time.

All modular power components, whether for direct sale to customers or for sale to our subsidiaries and

divisions for incorporation into their respective products, are manufactured at our Andover, Massachusetts,
production facility. Substantial damage to this facility due to fire, natural disaster, power loss or other events
could interrupt manufacturing. Any prolonged inability to utilize all or a significant portion of this facility
could have a material adverse effect on our results of operations.

We are exposed to foreign economic, political and other risks.

International sales have been and are expected to be a significant component of total sales. Dependence
on unaffiliated third party distributors for our international sales exposes us to special risks, such as foreign
economic and political instability, foreign currency controls and market fluctuations, trade barriers and tariffs,
foreign regulations and exchange rates. Our international customers’ business may be negatively affected by
the current crisis in the global credit and financial markets. Sudden or unexpected changes in the foregoing
could have a material adverse effect on our results of operations.

We may be unable to adequately protect our proprietary rights, which may limit our ability to compete
effectively.

We operate in an industry in which the ability to compete depends on the development or acquisition of
proprietary technologies that must be protected to preserve the exclusive use of such technologies. We devote
substantial resources to establish and protect our patents and proprietary rights, and we rely on patent and
intellectual property law to protect such rights. This protection, however, may not prevent competitors from
independently developing products similar or superior to our products. We 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, and this may have a material adverse affect on our competitive position. In addition, the
intellectual property laws of foreign countries may not protect our rights to the same extent as those of the
United States. We have been and may need to continue to defend or challenge patents. We have incurred and
expect to incur significant costs in and devote significant resources to these efforts which, if unsuccessful,
may have a material adverse effect on our results of operations and financial position.

We may face intellectual property infringement claims that could be costly to resolve.

The power supply industry is characterized by vigorous protection and pursuit of intellectual property

rights. We may in the future receive communications from third parties asserting that our products or
manufacturing processes infringe on a third party’s patent or other intellectual property rights. In January
2011, we were named in a complaint for patent infringement filed by SynQor, Inc. (see Part I — Item 3 —
Legal Proceedings). In the event a third party makes a valid intellectual property claim against us and a license
is not available to us on commercially reasonable terms, or at all, we could be forced to either redesign or stop
production of products incorporating that technology, and our operating results could be materially and
adversely affected. In addition, litigation may be necessary to defend us against claims of infringement, and
this litigation could be costly and divert the attention of key personnel. An adverse outcome in these types of
matters could have a material adverse impact on the results of our operations and financial condition.

We may face legal claims and litigation from product warranty or other claims that could be costly to
resolve.

We may in the future encounter legal action from customers, vendors or others concerning product
warranty or other claims. We generally offer a two-year warranty from the date title passes from us for all of
our standard products. We invest significant resources in the testing of our products; however, if any of our
products contain defects, we may be required to incur additional development and remediation costs, pursuant
to our warranty policies. These issues may divert our technical and other resources from other product
development efforts and could result in claims against us by our customers or others, including liability for

16

costs associated with product returns, which may adversely impact our operating results. If any of our products
contains defects, or has reliability, quality or compatibility problems, our reputation may be damaged, which
could make it more difficult for us to sell our products to existing and prospective customers and could
adversely affect our operating results.

Our ability to successfully implement our business strategy may be limited if we do not retain our key per-
sonnel and attract and retain skilled and experienced personnel.

Our success depends on our ability to retain the services of our executive officers. The loss of one or

more members of senior management could materially adversely affect our business and financial results. In
particular, we are dependent on the services of Dr. Vinciarelli, our founder, Chairman of the Board, Chief
Executive Officer, and President. The loss of the services of Dr. Vinciarelli could have a material adverse
effect on our development of new products and on our results of operations. In addition, we depend on highly
skilled engineers and other personnel with technical skills that are in high demand and are difficult to replace.
Our continued operations and growth depend on our ability to attract and retain skilled and experienced
personnel in a very competitive employment market. If we are unable to attract and retain these employees,
our ability to successfully implement our business strategy may be harmed.

Funds associated with our investments in auction rate securities may not be accessible at par value in the
short term, and given this illiquidity, we may be required to make additional adjustments to their carrying
value.

As of December 31, 2010, we held $19,075,000 of auction rate securities at par value, consisting of
collateralized debt obligations, supported by pools of student loans, sponsored by state student loan agencies
and corporate student loan servicing firms. We purchased these securities through the investment banking
affiliate of Bank of America, N.A. Before February 2008, the investment banks conducting the periodic
“Dutch auctions” by which interest rates for the securities had been established had committed their capital to
support such auctions in the event of insufficient third-party investor demand. Starting the week of February 11,
2008, a substantial number of auctions failed, as demand from third-party investors weakened and the
investment banks conducting the auctions chose not to commit capital to support such auctions (i.e.,
investment banks chose not to purchase securities themselves in order to balance supply and demand, thereby
facilitating a successful auction, as they had done in the past). We accepted a settlement offer from UBS AG
(“UBS”) in November 2008, and, as called for in the settlement, UBS purchased the then outstanding par
value of $8,600,000 of auction rate securities purchased through UBS on June 30, 2010. However, we have
received no settlement offer from Bank of America to date. While we do not currently anticipate the lack of
liquidity of our auction rate securities to adversely affect our ability to conduct business, the funds associated
with auction rate securities may not be accessible until a successful auction occurs, a buyer is found outside of
the auction process, the security is called or the underlying securities have matured.

In order to record the value of our auction rate securities appropriately each quarter, we have estimated

their market value and recorded an impairment charge. Deemed “available-for-sale”, these securities are
carried at fair value, with unrealized gains and losses, net of tax, attributable to credit loss recorded through
the statement of operations and unrealized gains and losses, net of tax, attributable to other non-credit factors
reported in “Accumulated other comprehensive (loss) income,” a component of Stockholders’ Equity. We
periodically evaluate if an investment is considered impaired, whether impairment is other than temporary, and
the measurement of an impairment loss.

The following circumstances, among others, may cause us to record such impairment charges to our

Consolidated Statements of Operations:

k

k

k

the default of an issuer or a specific security of that issuer;

the significant deterioration of the credit rating of a security or its issuer;

a tender offer for a specific security from the issuer valuing the security at less than par that is
accepted by the number of holders necessary to require all holders to tender their securities; and

17

k

development of a robust secondary market for auction rate securities, establishing an active market
value for our securities or similar securities that represents a substantial discount to par.

Such impairment charges or, in the event of a sale, realized losses could be material in amount and be

detrimental to our financial position, potentially impacting our ability to fund operations.

Changes in our effective tax rate may impact our results of operations.

Our effective tax rate has been difficult to predict in recent reporting periods due to the volatility of our

financial performance, as well as a range of factors outside of our control. Factors that may increase our future
effective tax rate include: increases in tax rates in various jurisdictions; the resolution of issues arising from
tax audits with various tax authorities; changes in the valuation of our deferred tax assets and liabilities;
adjustments to income taxes upon finalization of various tax returns; and changes in tax laws or the
interpretation of such tax laws. Any significant increase in our future effective tax rates could adversely impact
our net income in future periods.

If we fail to maintain an effective system of internal controls or discover material weaknesses in our
internal controls over financial reporting, we may not be able to report our financial results accurately or
timely or detect fraud, which could have a material adverse effect on our business.

An effective internal control environment is necessary for the Company to produce reliable financial
reports and is an important part of its effort to prevent financial fraud. Section 404 of the Sarbanes-Oxley Act
of 2002 requires our management to report on, and our independent registered public accounting firm to attest
to, the effectiveness of our internal control structure and procedures for financial reporting. We have an
ongoing program to perform the system and process evaluation and testing necessary to comply with these
requirements and to continuously improve and remediate internal controls over financial reporting.

While management evaluates the effectiveness of our internal controls on a regular basis, these controls
may not always be effective. There are inherent limitations on the effectiveness of internal controls, including
collusion, management override, and failure in human judgment. In addition, control procedures are designed
to reduce rather than eliminate business risks. In the event that our Chief Executive Officer, Chief Financial
Officer, or independent registered public accounting firm determines that our internal controls over financial
reporting are not effective as defined under Section 404, we may be unable to produce reliable financial
reports or prevent fraud, which could materially adversely affect our business. In addition, we may be subject
to sanctions or investigation by government authorities or self-regulatory organizations, such as the Securities
and Exchange Commission or The NASDAQ Stock Market, LLC. Any such actions could affect investor
perceptions of the Company and result in an adverse reaction in the financial markets due to a loss of
confidence in the reliability of our financial statements, which could cause the market price of our common
shares to decline or limit our access to capital.

ITEM 1B. UNRESOLVED STAFF COMMENTS

We have not received written comments from the Securities and Exchange Commission regarding our
periodic or current reports under the Securities Exchange Act of 1934, as amended, that were received 180 days
or more before December 31, 2010 and remain unresolved. There are no unresolved comments from the
Securities and Exchange Commission as of December 31, 2010.

ITEM 2. PROPERTIES

Our corporate headquarters building in Andover, Massachusetts, which we own, provides approximately

90,000 square feet of office space for our sales, marketing, engineering and administration personnel.

We also own a building of approximately 230,000 square feet in Andover, Massachusetts, which houses

all Massachusetts manufacturing activities.

Our Westcor division owns and occupies a building of approximately 31,000 square feet in Sunnyvale,

California.

18

ITEM 3. LEGAL PROCEEDINGS

As disclosed in prior filings, we received total payments of $1,770,000 in the second quarter of 2007 in
full settlement of patent infringement litigation against Artesyn Technologies, Inc., Lucent Technologies Inc.,
and the Tyco Power Systems, a unit of Tyco International Ltd. (which had acquired the Power Systems
business of Lucent Technologies). The full amount of the payments, net of a $177,000 contingency fee we had
accrued for our litigation counsel, was included in the second quarter of 2007 in “(Gain) loss from litigation-
related and other settlements, net” in the Consolidated Statement of Operations. We were subsequently
informed by its litigation counsel that the full amount of the contingency fee was waived and, therefore, the
related accrual of $177,000 was reversed in the second quarter of 2008.

On February 22, 2007, we announced an agreement in principle with Ericsson, Inc., the U.S. affiliate of
LM Ericsson, to settle a lawsuit brought by Ericsson against us in California state court. Under the terms of
the settlement agreement entered into on March 29, 2007, after a court ordered mediation, we paid
$50,000,000 to Ericsson, of which $12,800,000 was reimbursed by our insurance carriers. Accordingly, we
recorded a net loss of $37,200,000 from the litigation-related settlements in the fourth quarter of 2006. We
have been seeking further reimbursement from its insurance carriers. On November 14, 2008, a jury in the
United States District Court for the District of Massachusetts found in favor of us in a lawsuit against certain
of its insurance carriers with respect to the Ericsson settlement. The jury awarded $17,300,000 in damages to
us, although the verdict is subject to challenge in the trial court and on appeal. Both parties filed certain
motions subsequent to the ruling and, on March 2, 2009, the judge in the case rendered his decision on the
subsequent motions, reducing the jury award by $4,000,000. On March 26, 2009, the U.S. District Court,
District of Massachusetts (the “Court”) issued its judgment in the matter, affirming the award of $13,300,000,
plus prejudgment interest from the date of breach on March 29, 2007 through March 26, 2009, the date of
judgment in the amount of approximately $3,179,000. The insurance carriers have filed their appeal to this
total judgment in the amount of approximately $16,479,000. No final and collectible judgment yet has been
entered by the court.

Our decision to enter into the settlement followed an adverse ruling by the court in January 2007 in
connection with a settlement between Ericsson and co-defendants Exar Corporation (“Exar”) and Rohm
Device USA, LLC (“Rohm”), two of our component suppliers prior to 2002. Our writ of mandate appeal of
this ruling was denied in April, 2007. In September 2007, we filed a notice of appeal of the court’s decision
upholding the Ericsson-Exar-Rohm settlement. In December 2007, the court awarded Exar and Rohm amounts
for certain statutory and discovery costs associated with this ruling. As such, we accrued $240,000 in the
second quarter of 2007, included in “(Gain) loss from litigation-related and other settlements, net” in the
Consolidated Statements of Operations, of which $78,000 of the award was paid in the second quarter of 2008.
On February 9, 2009, the Court of Appeals issued its opinion affirming the judgment for Exar and Rohm in
full. During the third quarter of 2009, we completed negotiations with Exar and Rohm, resulting in separate
settlement agreements calling for a final payment to Exar of $70,000 and no additional payment due Rohm.
As a result of the settlements, we reversed a remaining excess accrual of approximately $96,000 in the third
quarter of 2009, which is recorded in “Gain from litigation-related and other settlements, net” in the
accompanying Consolidated Statement of Operations.

During the third quarter of 2009, we entered into a release and settlement agreement with a vendor over

alleged product performance issues with certain products the vendor had sold to us. We received a payment of
$750,000 in consideration for the settlement, which is recorded in “Gain from litigation-related and other
settlements, net” in the accompanying Consolidated Statement of Operations.

On January 28, 2011, SynQor, Inc. (“SynQor”) filed a complaint for patent infringement against Ericsson,
Inc. (“Ericsson”), Cisco Systems, Inc. (“Cisco”) and us in U.S. District Court for the Eastern District of Texas.
This immediately followed a complaint filed by us on January 26, 2011 in U.S. District Court for the District
of Massachusetts, in which we sought a declaratory judgment that our bus converter products do not infringe
any valid claim of certain of SynQor’s U.S. patents, and that the claims of those patents are invalid. With
respect to us, SynQor’s complaint alleges that our products, including, but not limited to, unregulated bus
converters used in intermediate bus architecture power supply systems, infringe certain SynQor patents.

19

SynQor seeks, amongst other items, an injunction against further infringement and an award of unspecified
compensatory and enhanced damages, interest, costs and attorney fees. On February 8, 2011, SynQor filed a
motion for preliminary injunction seeking an order enjoining us from manufacturing, using, selling, and
offering for sale in the United States and/or importing into the United States certain identified unregulated bus
converters, as well as any other bus converters not significantly different from those products. On February 17,
2011, we dismissed our Massachusetts action without prejudice to allow the litigation to proceed in Texas. We
do not believe any of our products, including our unregulated bus converters, infringe any valid claim of the
SynQor patents, either alone or when used in an intermediate bus architecture implementation. We believe
SynQor’s claims lack merit and therefore plan to vigorously defend ourselves against SynQor’s patent
infringement allegations.

We are involved in certain other litigation and claims incidental to the conduct of its business. While the

outcome of lawsuits and claims against us cannot be predicted with certainty, we do not expect any current
litigation or claims to have a material adverse impact on our financial position or results of operations.

ITEM 4. (REMOVED AND RESERVED)

PART II

ITEM 5. MARKET FOR REGISTRANT’S COMMON EQUITY AND RELATED STOCKHOLDER

MATTERS

Our Common Stock is listed on The NASDAQ Stock Market, LLC, under the trading symbol “VICR.”
Shares of our Class B Common Stock are not registered with the Securities and Exchange Commission, are
not listed on any exchange nor traded on any market, and are subject to transfer restrictions under our Restated
Certificate of Incorporation, as amended.

The following table sets forth the quarterly high and low sales prices for the Common Stock as reported

by The NASDAQ Stock Market for the periods indicated:

2010

High

Low

First Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Second Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Third Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fourth Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$14.31
16.24
16.35
19.50

$ 7.98
10.87
11.98
14.65

2009

High

Low

First Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Second Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Third Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fourth Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 6.75
7.30
7.97
9.68

$ 3.86
4.63
6.42
6.50

As of February 28, 2011, there were 228 holders of record of our Common Stock and 16 holders of
record of our Class B Common Stock. These numbers do not reflect persons or entities that hold their stock in
nominee or “street name” through various brokerage firms.

Dividend Policy

Dividends are declared at the discretion of our Board of Directors and depend on actual cash from
operations, our financial condition and capital requirements, and any other factors the Board of Directors may
consider relevant.

On June 28, 2010, the Company’s Board of Directors approved a cash dividend of $0.30 per share of the
Company’s stock. The total dividend of approximately $12,506,000 was paid on July 30, 2010 to shareholders
of record at the close of business on July 16, 2010.

20

From time to time, excess cash held at the subsidiary level is transferred to the Company via cash

dividends. Because we own less than 100% of the common stock of certain subsidiaries, such subsidiary
dividends can result in payments to outside shareholders of those subsidiaries. During the year ending
December 31, 2009, two subsidiaries paid a total of $4,690,000 in cash dividends on subsidiary common
stock, of which $3,421,000 was paid to the Company and $1,269,000 was paid to outside shareholders (i.e.,
paid to certain subsidiary employees who own common stock in the subsidiary). During the year ending
December 31, 2010, three subsidiaries paid a total of $5,457,000 in cash dividends, of which $4,905,000 was
paid to the Company and $552,000 was paid to outside shareholders. Dividends paid to outside shareholders
are accounted for as a reduction in noncontrolling interest.

Issuer Purchases of Equity Securities

Period

Total
Number
of Shares
(or Units)
Purchased

Average Price Paid
per Share (or Unit)

Total Number of
Shares (or Units)
Purchased as Part
of Publicly
Announced Plans
or Programs

October 1 — 31, 2010 . . . . . . . . . . . . . . .
November 1 — 30, 2010 . . . . . . . . . . . . .
December 1 — 31, 2010. . . . . . . . . . . . . .

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . .

—
—
—

—

$—
$—
$—

$—

—
—
—

—

Maximum
Number (of
Approximate
Dollar Value) of
Shares (or Units)
that May Yet Be
Purchased Under
the Plans or
Programs

$8,541,000
$8,541,000
$8,541,000

$8,541,000

In November 2000, our Board of Directors authorized the repurchase of up to $30,000,000 of our

Common Stock (the “November 2000 Plan”). The November 2000 Plan authorizes us to make such
repurchases from time to time in the open market or through privately negotiated transactions. The timing and
amounts of stock repurchases are at the discretion of management based on its view of economic and financial
market conditions. We did not repurchase shares of Common Stock during the year ended December 31, 2010.

21

Stockholder Return Performance Graph

The graph set forth below presents the cumulative, five-year stockholder return for each of the

Corporation’s Common Stock, the Standard & Poor’s 500 Index (“S&P 500 Index”), a value-weighted index
made up of 500 of the largest, by market capitalization, listed companies, and the Standard & Poor’s SmallCap
600 Index (“S&P SmallCap 600 Index”), a value-weighted index of 600 listed companies with market
capitalizations between $200,000,000 and $1,000,000,000.

The graph assumes an investment of $100 on December 31, 2005, in each of our Common Stock, the
S&P 500 Index, and the S&P SmallCap 600 Index, and assumes reinvestment of all dividends. The historical
information set forth below is not necessarily indicative of future performance.

Comparison of Five Year Cumulative Return
Among Vicor Corporation, S&P 500 Index
and S&P SmallCap 600 Index

160

140

120

100

80

60

40

20

0

S
R
A
L
L
O
D

2005

2006

2007

2008

2009

2010

Vicor Corporation

S&P 500 Index

S&P SmallCap 600 Index

Vicor Corporation

S&P 500 Index

2005

2006

2007

2008

2009

2010

$100.00 $ 71.62 $103.31

$45.02

$63.34

$113.84

$100.00 $115.79 $122.16

$76.97

$97.32

$111.99

S&P SmallCap 600 Index

$100.00 $115.11 $114.77

$79.12

$99.35

$125.48

22

ITEM 6. SELECTED FINANCIAL DATA

The following selected consolidated financial data with respect to our statements of operations for the

years ended December 31, 2010, 2009, and 2008, and with respect to our balance sheets as of December 31,
2010 and 2009, are derived from our Consolidated Financial Statements, which appear elsewhere in this report
and which have been audited by Grant Thornton LLP, our independent registered public accounting firm. The
following selected consolidated financial data with respect to our statements of operations for the years ended
December 31, 2007 and 2006, and with respect to our balance sheets as of December 31, 2008, 2007 and
2006 are derived from our Consolidated Financial Statements, which are not included herein.

Statement of Operations Data

Net revenues . . . . . . . . . . . . . . . . . . . . . . . . . .
Income (loss) from operations . . . . . . . . . . . . . .
Consolidated net income (loss) . . . . . . . . . . . . .
Net income attributable to noncontrolling

interest . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Net income (loss) attributable to Vicor

Corporation . . . . . . . . . . . . . . . . . . . . . . . . .
Net income (loss) per share — basic and diluted
attributable to Vicor Corporation . . . . . . . . . .
Weighted average shares — basic . . . . . . . . . . .
Weighted average shares — diluted . . . . . . . . . .
Cash dividends per share . . . . . . . . . . . . . . . . .

2010

$250,733
29,122
33,539

2007

Year Ended December 31,
2009
2008
(In thousands, except per share data)
$205,368
(1,142)
(1,778)

$195,827
1,071
5,874

$197,959
4,773
4,093

2006

$192,047
(33,182)
(28,497)

214

1,295

1,817

539

562

33,325

2,798

(3,595)

5,335

(29,059)

0.80
41,700
41,772
0.30

$

0.07
41,665
41,671

$

— $

(0.09)
41,651
41,651
0.30

0.13
41,597
41,687
0.30

$

(0.69)
41,839
41,839
0.27

$

Balance Sheet Data

2010

2009

2007

2006

Working capital . . . . . . . . . . . . . . . . . . . . . . . .
Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total liabilities . . . . . . . . . . . . . . . . . . . . . . . . .
Total equity . . . . . . . . . . . . . . . . . . . . . . . . . . .

$105,454
204,912
25,900
179,012

$ 74,791
180,577
24,511
156,066

As of December 31,
2008
(In thousands)
$ 65,297
171,922
20,496
151,426

$114,924
192,458
23,978
168,480

$123,467
247,461
73,696
173,765

ITEM 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Overview

We design, develop, manufacture and market modular power components and complete power systems
based upon a portfolio of patented technologies. We sell our products primarily to customers in the higher-
performance, higher-power segments of the power systems market, including aerospace and defense electron-
ics, enterprise and high performance computing, industrial equipment and automation, telecommunications and
network infrastructure, and vehicles and transportation through a network of independent sales representative
organizations in North and South America and, internationally, through independent distributors. International
sales as a percentage of total revenues were approximately 49% in 2010, 41% in 2009 and 42% in 2008,
respectively.

We have organized our business segments according to our key product lines. The BBU segment designs,

develops, manufactures and markets modular power converters and configurable products, and also includes
the operations of our Westcor division, the six entities comprising Vicor Custom Power, and the BBU activities
through VJCL. The V*I Chip segment includes V*I Chip Corporation which designs, develops, manufactures

23

and markets our FPA products. V*I Chip activities conducted through VJCL are included in the V*I Chip
segment. Picor develops, manufactures and markets integrated circuits and related products for use in a variety
of power management and power system applications. Picor develops these products to be sold as part of
Vicor’s products or to be sold to third parties for separate applications.

For the year ended December 31, 2010, revenues increased to $250,733,000 from $197,959,000 in 2009.

We had income before taxes of $29,619,000 in 2010 as compared to $5,455,000 in 2009. We reported net
income in 2010 of $33,325,000 as compared to $2,798,000 in 2009, and a diluted income per share of $0.80
in 2010 as compared with a diluted income per share of $0.07 in 2009. The gross margin for 2010 increased
to 45.7%, compared with 44.2% in 2009. The primary components of the increase in gross margin dollars and
percentage were the increase in net revenues and lower BBU Andover and V*I Chip per unit productions costs.
During the third and fourth quarters of 2010, respectively, the Company recorded non-recurring, non-cash tax
benefits of $5,158,000, or approximately $0.12 per diluted share, and $1,159,000, or approximately $0.03 per
diluted share, due to the release of portions of its deferred tax valuation allowance (See Note 14).

The book to bill ratio, calculated as the dollar amount of orders placed with scheduled delivery dates
within one year divided by the net revenues in the respective period, for the third and fourth quarters of 2010
was 1.02:1 and 0.66:1, respectively. The book to bill ratio for the year ended December 31, 2010 was 1.09:1,
compared to 1.03:1 for the year ended December 31, 2009. We ended 2010 with approximately $78,900,000 in
backlog, representing the total of purchase orders received for which product has not yet been shipped,
compared to $57,200,000 at the end of 2009.

Operating expenses for 2010 increased $2,577,000, or 3.1%, to $85,398,000 from $82,821,000 in 2009,

principally due to increases in research and development of $4,345,000, selling, general and administrative
expenses of $1,485,000, and a decrease in “Gain from litigation-related and other settlements, net” of
$846,000, offset by a decrease in aggregate pre-tax severance charges of $4,099,000 in connection with
workforce reductions implemented during 2009. The key increases in research and development expenses were
compensation expenses of $2,101,000, outside services of $787,000, deferred costs of $454,000, project
materials of $328,000, facilities expenses of $152,000, employment recruiting of $117,000, depreciation and
amortization of $110,000, and set-up and tooling charges of $100,000. The key increases in selling, general
and administrative expenses were commissions expense of $543,000, advertising expenses of $465,000, outside
services of $237,000, travel expenses of $185,000, employment advertising and recruiting of $136,000, and
facilities expense of $114,000, offset by a decrease in legal fees of $302,000.

During the third quarter of 2009, we entered into a release and settlement agreement with a vendor over

alleged product performance issues with certain products the vendor had sold to us. We received a payment of
$750,000 in consideration for the settlement, which is recorded in “Gain from litigation-related and other
settlements, net” in the accompanying Consolidated Statement of Operations. In addition, we completed
negotiations with Exar and Rohm, resulting in separate settlement agreements calling for a final payment to
Exar of $70,000 and no additional payment due Rohm. As a result of the settlements, we reversed a remaining
excess accrual of approximately $96,000 in the third quarter of 2009, which is recorded in “Gain from
litigation-related and other settlements, net” in the accompanying Consolidated Statement of Operations.

“Other income, net” decreased $185,000 to $497,000 from $682,000 in 2009. The primary reasons for the

decline were decreases in unrealized gain on trading securities of $298,000, interest income of $279,000, and
foreign currency gains of $193,000, offset by an increase in credit losses on available for sale securities of
$318,000 and gain on disposal of equipment of $218,000.

In 2010, depreciation and amortization totaled $10,222,000, and capital additions were $12,103,000,

compared to $10,198,000 and $10,643,000, respectively, for 2009.

Inventories increased by approximately $14,132,000, or 66.2%, to $35,489,000 in 2010 as compared with

$21,357,000 at the end of 2009 in order to meet the increase in demand across all three segments. V*I Chip,
BBU, and Picor inventories increased approximately $8,105,000, $5,334,000, and $693,000, respectively.

The following table sets forth certain items of selected consolidated financial information as a percentage

of net revenues for the years ended December 31. This table and the subsequent discussion should be read in

24

conjunction with the selected financial data and the Consolidated Financial Statements and related footnotes
contained elsewhere in this report.

Net revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gross margin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selling, general and administrative expenses . . . . . . . . . . . . . . . . . . . . . . .
Research and development expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income before income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

100.0% 100.0% 100.0%
45.7% 44.2% 42.0%
19.7% 24.2% 27.4%
14.4% 16.0% 15.3%
2.8% 0.4%
11.8%

Year Ended December 31,
2010
2008
2009

Critical Accounting Policies and Estimates

Management’s Discussion and Analysis of Financial Condition and Results of Operations discusses our

Consolidated Financial Statements, which have been prepared in accordance with accounting principles
generally accepted in the United States. The preparation of these financial statements requires management to
make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses,
and related disclosure of contingent assets and liabilities. On an ongoing basis, management evaluates its
estimates and judgments, including those related to revenue recognition, allowance for doubtful accounts,
product warranties, inventories, investments, intangible assets, income taxes, impairment of long-lived assets,
share-based compensation, contingencies and litigation. Management bases its estimates and judgments on
historical experience, knowledge of current conditions and on various other factors that are believed to be
reasonable under the circumstances, the results of which form the basis for making judgments about the
carrying value of assets and liabilities that are not readily apparent from other sources. Actual results may
differ from these estimates under different assumptions or conditions.

Allowance for Doubtful Accounts

We maintain allowances for doubtful accounts for estimated losses resulting from the inability of its

customers to make required payments, based on assessments of customers’ credit-risk profiles and payment
histories. If the financial condition of our customers were to deteriorate, resulting in an impairment of their
ability to make payments, additional allowances may be required.

Inventories

We employ a variety of methodologies to estimate allowances for its inventory for estimated obsolescence or
unmarketable inventory, based upon its known backlog and historical usage, and assumptions about future demand
and market conditions. For BBU products produced at our Andover facility, our principal manufacturing location, the
model used is based upon a comparison of on-hand quantities to projected demand, such that amounts of inventory
on hand in excess of a three-year projected usage are fully reserved. Since V*I Chip products are still at a relatively
early stage, a one-year projected usage assumption is used. While we have used our best efforts and believe we have
used the best available information to estimate future demand, due to uncertainty in the economy and our business
and the inherent difficulty in predicting future demand, it is possible that actual demand for our products will differ
from our estimates. If actual future demand or market conditions are less favorable than those projected by
management, additional inventory reserves for existing inventories may need to be recorded in future periods.

Fair Value Measurements

We account for certain financial assets at fair value, defined as the price that would be received to sell an

asset or paid to transfer a liability (i.e., an exit price) in the principal or most advantageous market for the
asset or liability in an orderly transaction between market participants on the measurement date. As such, fair
value is a market-based measurement that is determined based on assumptions that market participants would
use in pricing an asset or liability. If management made different assumptions or judgments, material
differences in fair values could occur.

25

Short-Term and Long-Term Investments

Our short-term and long-term investments are classified as either trading or available-for-sale securities.
Available-for-sale securities are carried at fair value, with unrealized gains and losses, net of tax, attributable
to credit loss recorded through the statement of operations and unrealized gains and losses, net of tax,
attributable to other non-credit factors reported in “Accumulated other comprehensive (loss) income,” a
component of Total Equity. In determining the amount of credit loss, we compare the present value of cash
flows expected to be collected to the amortized cost basis of the securities, considering credit default risks
probabilities and changes in credit ratings as significant inputs, among other factors. Trading securities are
carried at fair value, with unrealized gains and losses recognized through the statement of operations each
reporting period. We periodically evaluate if an investment is considered impaired, whether an impairment is
other than temporary, and the measurement of an impairment loss. We consider a variety of impairment
indicators such as, but not limited to, a significant deterioration in the earnings performance, credit rating, or
asset quality of the investment.

As of December 31, 2010, we held $19,075,000 of auction rate securities at par value. These auction rate

securities consist of collateralized debt obligations, supported by pools of student loans, sponsored by state
student loan agencies and corporate student loan servicing firms. The interest rates for these securities are
reset at auction at regular intervals ranging from seven to 90 days. The auction rate securities held by us
traded at par prior to February 2008 and are callable at par at the option of the issuer.

Until February 2008, the auction rate securities market was liquid, as the investment banks conducting the

periodic “Dutch auctions” by which interest rates for the securities had been established had committed their
capital to support such auctions in the event of insufficient third-party investor demand. Starting the week of
February 11, 2008, a substantial number of auctions failed, as demand from third-party investors weakened
and the investment banks conducting the auctions chose not to commit capital to support such auctions (i.e.,
investment banks chose not to purchase securities themselves in order to balance supply and demand, thereby
facilitating a successful auction, as they had done in the past). The consequences of a failed auction are (a) an
investor must hold the specific security until the next scheduled auction (unless that investor chooses to sell
the security to a third party outside of the auction process) and (b) the interest rate on the security generally
resets to an interest rate set forth in each security’s indenture.

As of December 31, 2010, we held auction rate securities that had experienced failed auctions totaling
$19,075,000 at par value, all of which had been purchased through and are held by a broker-dealer affiliate of
Bank of America, N.A. (the “Failed Auction Securities”). The majority of the Failed Auction Securities held
by us were AAA/Aaa rated by the major credit rating agencies, with all of the securities collateralized by
student loans, of which most are guaranteed by the U.S. Department of Education under the Federal Family
Education Loan Program. Management is not aware of any reason to believe any of the issuers of the Failed
Auction Securities held by us are presently at risk of default. Through December 31, 2010, we have continued
to receive interest payments on the Failed Auction Securities in accordance with the terms of their respective
indentures. We believe that all of our auction rate security investments will ultimately be liquidated without
significant loss primarily due to the overall quality of the issues held and the collateral securing the substantial
majority of the underlying obligations. However, current conditions in the auction rate securities market have
led us to conclude the recovery period for the Failed Auction Securities exceeds 12 months. As a result, we
have continued to classify the Failed Auction Securities as long-term as of December 31, 2010.

Long-Lived Assets

We evaluate the recoverability of our identifiable intangible assets, goodwill and other long-lived assets

when events or circumstances indicate a potential impairment. We periodically assess the remaining use of
fixed assets based upon operating results and cash flows from operations. Equipment has been written-down as
a result of these assessments as necessary. Goodwill is tested for potential impairment at least annually at the
reporting unit level.

26

Stock-Based Compensation

We record stock-based compensation expense based on the fair value of stock-based awards measured at
the grant date and recognized over the relevant service period. We estimate the fair value of each stock-based
award on the measurement date using either the current market price or the Black-Scholes option valuation
model. The Black-Scholes option valuation model incorporates assumptions as to stock price volatility, the
expected life of options, forfeiture rate, a risk-free interest rate and dividend yields.

During 2010, we granted stock-based awards with performance-based vesting provisions tied to achieve-
ments of certain performance conditions. For performance-based awards, we assess, on an ongoing basis, the
probability of whether the performance criteria will be achieved. If and when achievement of the performance
criteria is deemed probable, we begin to recognize the associated compensation expense for the stock options
over the relevant performance period.

Many of these assumptions are highly subjective and require the exercise of management judgment. If

management made different estimates or judgments, material differences in the amount of stock-based
compensation could occur.

Product Warranties

We generally warrant our products for a period of two years. We maintain allowances for estimated
product returns under warranty based upon a review of known or potential product failures in the field and
upon historical patterns of product returns. If unforeseen product issues arise or product returns increase above
expected rates, additional allowances may be required.

Income Taxes

We recognize deferred tax assets and liabilities using enacted rates for the effect of temporary differences
between the book and tax bases of recorded assets and liabilities. We reduce deferred tax assets by a valuation
allowance if it is more likely than not that some portion or all of the deferred tax assets will not be realized.
Prior to September 30, 2010, we maintained a valuation allowance against a significant portion of our deferred
tax assets, consisting of net operating loss carryforwards, tax credit carryforwards and deductible temporary
differences. Based on our pre-tax income for the nine months ended September 30, 2010 being sufficient to
fully utilize our net operating loss carryforwards, a history of cumulative earnings before taxes for financial
reporting purposes over a 12-quarter period, and expected future taxable income, we determined it was more
likely than not a significant portion of the deferred tax assets would be realized. As a result, at September 30,
2010, we determined that it was appropriate to reverse a portion of its valuation allowance by $5,158,000 as a
discrete benefit for income taxes for certain deductible temporary differences expected to be realized in future
periods. An additional benefit of $1,159,000 was recorded in the fourth quarter of 2010. We could not make
such a determination in the prior quarters of fiscal 2010 due to a lack of confidence in being able to accurately
forecast the expected ordinary income (loss) for the year largely due to global economic conditions and the
possible impact continued economic and business uncertainty would have on our business at those times.

As of December 31, 2010, we have a remaining valuation allowance of approximately $10,259,000

against certain deferred tax assets, for which realization cannot be considered more likely than not at this time.
Such deferred tax assets principally relates to tax credit carryforwards in certain state tax jurisdictions for
which sufficient taxable income for utilization cannot be projected at this time or the credits may expire
without being utilized. We assess the need for the valuation allowance on a quarterly basis. The valuation
allowance against these deferred tax assets may require adjustment in the future based on changes in the mix
of temporary differences, changes in tax laws, and operating performance. In addition, the assessment of the
valuation allowance requires us to make estimates of future taxable income and to estimate reversals of
temporary differences. Changes in the assumptions or other circumstances may require additional valuation
allowances if actual reversals of temporary differences differ from those estimates. If and when we determine
the valuation allowance should be released, the adjustment would result in a tax benefit in the Consolidated
Statements of Operations and may include a portion to be accounted for through “Additional paid-in capital”,

27

a component of Stockholders’ Equity. The amount of the tax benefit to be recorded in a particular quarter
could be material.

We follow a two-step process to determine the amount of tax benefit to recognize in our financial
statements. First, the tax position must be evaluated to determine the likelihood that it will be sustained upon
examination by a tax authority. If the tax position is deemed “more-likely-than-not” to be sustained, the tax
position is then assessed to determine the amount of benefit to recognize in the financial statements. The
amount of the benefit that may be recognized is the largest amount that has a greater than 50 percent
likelihood of being realized upon ultimate settlement. If the tax position does not meet the “more-likely-than-
not” threshold then it is not recognized in the financial statements. We accrue interest and penalties, if any,
related to unrecognized tax benefits as a component of income tax expense. If the judgments and estimates
made by us are not correct, the unrecognized tax benefits may have to be adjusted, and the adjustments could
be material.

Contingencies

From time to time, we receive notices of product failure claims, infringement of patent or intellectual

property rights of others or for other claims. In fact, we have recently been named in a complaint for patent
infringement filed by SynQor, Inc. in January 2011 (see Part I — Item 3 - Legal Proceedings). We assess each
matter to determine if a contingent liability should be recorded. In making this assessment, we may consult,
depending on the nature of the matter, with external legal counsel and technical experts. Based on the
information we obtain, combined with our judgment regarding all the facts and circumstances of each matter,
we determine whether it is probable that a contingent loss may be incurred and whether the amount of such
loss can be reasonably estimated. Should a loss be probable and reasonably estimable, we record a loss. In
determining the amount of the loss, we consider advice received from experts in the specific matter, current
status of legal proceedings, if any, prior case history and other factors. Should the judgments and estimates
made by us be incorrect, we may need to record additional contingent losses that could materially adversely
impact our results of operations and financial position.

Year ended December 31, 2010 compared to Year ended December 31, 2009

Net revenues for fiscal 2010 were $250,733,000, an increase of $52,774,000 or 26.7%, as compared to

$197,959,000 for the same period in 2009.

The components of revenue for the years ended December 31 were as follows (dollars in thousands):

2010

2009

Increase

$

%

BBU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V*I Chip (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Picor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$217,018
28,972
4,743

$186,980
8,960
2,019

$30,038
20,012
2,724

16.1%
223.3%
134.9%

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$250,733

$197,959

$52,774

26.7%

(1) V*I Chip products sold by VJCL are included in the V*I Chip amounts in both years. The 2009 amounts were previously included in BBU.

Overall orders for fiscal year 2010 increased by 33.5% compared with 2009. This increase was caused by

increases in BBU, V*I Chip, and Picor orders during the period of 18.3%, 197.1% and 174.5%, respectively.
The book-to-bill ratio for fiscal year 2010 was 1.09:1 as compared to 1.03:1 in 2009.

Gross margin for fiscal 2010 increased $26,926,000, or 30.7%, to $114,520,000 from $87,594,000 in
2009. Gross margin as a percentage of net revenues increased to 45.7% from 44.2% compared to the same
period a year ago. The primary components of the increase in gross margin dollars and percentage were the
increase in net revenues and lower BBU Andover and V*I Chip per unit productions costs.

28

Selling, general and administrative expenses were $49,417,000 for 2010, an increase of $1,485,000, or

3.1%, as compared to $47,932,000 for the same period in 2009. As a percentage of net revenues, selling,
general and administrative expenses decreased to 19.7% from 24.2%, due to the increase in net revenues.

The components of the $1,485,000 increase were as follows (in thousands):

Increase (decrease)

Commissions expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Advertising expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outside services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Travel expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Employment advertising and recruiting . . . . . . . . . . . . . . . . . . . . . . .
Facilities expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Telephone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audit and tax fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Legal fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Depreciation and amortization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

543
465
237
185
136
114
98
64
(302)
(167)
112
$ 1,485

8.6% (1)
19.0% (2)
23.1% (3)
10.8% (4)
111.4% (5)
8.6%
9.9%
5.1%
(28.5)% (6)
(4.9)% (7)
0.4%
3.1%

(1) Increase primarily attributed to the increase in net revenues, subject to changes in the mix of revenues sub-

ject to commissions.

(2) Increase primarily attributed to the increase trade publication advertising and increased participation in

trade shows, primarily by V*I Chip.

(3) Increase primarily attributed to the outsourcing of certain information technology functions that were per-

formed in-house in prior periods.

(4) Represents an overall increase in travel across all business units.

(5) Increase due to increase in recruiting costs for newly hired personnel.

(6) Decrease primarily attributed to a decrease in activity associated with the Company’s litigation brought

against certain of its insurance carriers with respect to the Ericsson, Inc. settlement of product liability liti-
gation in 2010 compared to 2009.

(7) Decrease due to certain fixed assets becoming fully depreciated during 2010.

Research and development expenses increased $4,345,000, or 13.7%, to $35,981,000 in 2010 from
$31,636,000 in 2009. As a percentage of net revenues, research and development decreased to 14.4% from
16.0%, due to the increase in net revenues.

The components of the $4,345,000 increase were as follows (in thousands):

Increase

Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $2,101
787
Outside services/subcontract labor . . . . . . . . . . . . . . . . . . . . . . . . . . .
454
Deferred costs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
328
Project materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
152
Facilities expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
117
Employment recruiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
110
Depreciation and amortization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
100
Set-up and tooling charges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
196
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other, net

8.8% (1)
98.1% (2)
53.6% (3)
11.3% (4)
8.8%
132.3% (5)
7.6%
47.1%
13.2%

$4,345

13.7%

29

(1) Increase primarily attributed to an increase in research and development personnel for the BBU and V*I

Chip business units, annual compensation adjustments in May 2010, and an increase in fringe expense due
to increase in premiums for employee health benefits.

(2) Increase primarily attributed to increased use of outside services and subcontract labor due to increased

activity at Vicor Custom subsidiaries, in lieu of hiring permanent employees.

(3) Increase primarily attributed to a decrease as compared to the prior year, in the deferral of costs capitalized

for certain non-recurring engineering projects for which the related revenues have been deferred.

(4) Increase primarily attributed to an increase in project materials associated with the development of V*I

Chip and Picor products.

(5) Increase primarily attributed to relocation costs for newly hired research and development personnel for

the V*I Chip business unit.

During 2009, we initiated and completed workforce reductions and pre-tax charges were recorded for the

cost of severance and other employee-related costs involving cash payments during 2009 and 2010 based on
each employee’s length of service. Total severance charges of $4,099,000 were recorded in 2009.

During the third quarter of 2009, we entered into a release and settlement agreement with a vendor over

alleged product performance issues with certain products the vendor had sold to us. We received a payment of
$750,000 in consideration for the settlement, which is recorded in “Gain from litigation-related and other
settlements, net” in the accompanying Consolidated Statement of Operations. In addition, we completed
negotiations with Exar and Rohm, resulting in separate settlement agreements calling for a final payment to
Exar of $70,000 and no additional payment due Rohm. As a result of the settlements, we reversed a remaining
excess accrual of approximately $96,000 in the third quarter of 2009, which is recorded in “Gain from
litigation-related and other settlements, net” in the accompanying Consolidated Statement of Operations.

The major changes in the components of the “Other income, net” for the years ended December 31 were

as follows (in thousands):

2010

2009

Increase
(decrease)

Interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unrealized gain on trading securities . . . . . . . . . . . . . . . . . . . . . . . . .
Unrealized loss on auction rate securities rights . . . . . . . . . . . . . . . . .
Credit losses on available for sale securities . . . . . . . . . . . . . . . . . . . .
Foreign currency (losses) gains, net . . . . . . . . . . . . . . . . . . . . . . . . . .
Gain on disposal of equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 438
970
(962)
(146)
(158)
248
107

$ 717
1,268
(964)
(464)
35
30
60

$ 497

$ 682

$(279)
(298)
2
318
(193)
218
47

$(185)

The unrealized gains (losses) and estimated credit loss on our auction rate securities and securities rights

results from the change in the estimate fair value of these investments as of December 31, 2010 and 2009,
compared to December 31, 2009 and 2008, respectively. The decrease in interest income is due to lower
average balances on certain of our cash accounts that bear interest as well as a decrease in interest rates. Our
exposure to market risk for fluctuations in foreign currency exchange rates relates primarily to the operations
of VJCL. The functional currency of our subsidiaries in Europe and Hong Kong is the U.S. dollar.

Income before income taxes was $29,619,000 in 2010 compared to $5,455,000 for 2009.

30

The (benefit) provision for income taxes and the effective income tax rate for the years ended December

31 were as follows (dollars in thousands):

(Benefit) provision for income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ (3,920)
(13.2%)
Effective income tax rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 1,362
25.0%

2010

2009

The increase in the benefit for income taxes and the decrease in the effective income tax rate for the year

ended December 31, 2010, compared to 2009, was principally due to the tax benefits of ($5,158,000) and
($1,159,000) recorded as a result of reversing portions of our deferred tax valuation allowance in the third and
fourth quarters of 2010, respectively, partially offset by an increase in federal, state and foreign income taxes
as compared to 2009. Please see Note 14 of the Consolidated Financial Statements for a discussion of the
accounting for the tax benefit, deferred tax assets and deferred tax valuation allowances.

Net income of noncontrolling interest decreased $1,081,000 from $1,295,000 for 2009 to $214,000 in

2010. This was due to lower net income at certain entities in which we hold a noncontrolling interest.

Basic and diluted income per share attributable to Vicor Corporation was $0.80 for the year ended

December 31, 2010 compared to $0.07 for the year ended December 31, 2009.

Year ended December 31, 2009 compared to Year ended December 31, 2008

Net revenues for fiscal 2009 were $197,959,000, a decrease of $7,409,000 or 3.6%, as compared to

$205,368,000 for the same period in 2008.

The components of revenue for the years ended were as follows (dollars in thousands):

2009

2008

$

%

Increase (decrease)

BBU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $186,980
8,960
V*I Chip (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2,019
Picor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$189,360
14,991
1,017

$(2,380)
(6,031)
1,002

(1.3)%
(40.2)%
98.5%

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $197,959

$205,368

$(7,409)

(3.6)%

(1) V*I Chip products sold by VJCL are included in the V*I Chip amounts in 2009. The 2009 amounts were previously included in BBU.

Sales of V*I Chip products by VJCL in 2008 were not material.

Overall orders for fiscal year 2009 decreased by 3.6% compared with 2008. This decrease was caused by
a decrease in BBU orders during the period of 4.8%, offset by an increase in V*I Chip orders of 6.1% and an
increase in Picor orders of 140.1%. The book-to-bill ratio for fiscal year 2009 and 2008 was 1.03:1.

Gross margin for fiscal 2009 increased $1,309,000, or 1.5%, to $87,594,000 from $86,285,000 in 2008.

Gross margin as a percentage of revenues increased to 44.2% from 42.0% compared to the same period a year
ago. The increase in gross margin dollars and gross margin percentage was the result of a more favorable
product mix, principally due to increased shipments of higher gross margin products from the Vicor Custom
Power subsidiaries and a decrease in shipments of lower gross margin V*I Chip products. Lower production
costs also contributed to the higher gross margin.

Selling, general and administrative expenses were $47,932,000 for 2009, a decrease of $8,274,000, or
14.7%, as compared to $56,206,000 for the same period in 2008. As a percentage of net revenues, selling,
general and administrative expenses decreased to 24.2% from 27.4%.

31

The components of the $8,274,000 decrease were as follows (in thousands):

Increase (decrease)

Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Legal fees. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audit and tax fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Advertising expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Travel expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Training expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Depreciation and amortization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
International office expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Employment advertising and recruiting . . . . . . . . . . . . . . . . . . . . . . . . . . .
Facilities expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stockholder reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Commissions expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$(3,000)
(1,672)
(923)
(886)
(657)
(245)
(197)
(104)
(97)
(53)
(82)
75
(433)

$(8,274)

(10.6)% (1)
(61.7)% (2)
(42.6)% (3)
(27.9)% (4)
(29.2)% (5)
(17.0)%
(5.8)%
(28.5)%
(87.0)%
(3.3)%
(32.7)%
1.2%
(10.9)%

(14.7)%

(1) Decrease primarily attributable to the workforce reductions completed in 2009.

(2) Decrease primarily attributed to a decrease in activity associated with our lawsuit brought against certain
of its insurance carriers with respect to the Ericsson, Inc. settlement of product liability litigation in 2009
compared to 2008.

(3) Decrease primarily attributed to the late filings of our 2007 Forms 10-Q and additional work related to

accounting for our investment in GWS in the first quarter of 2008.

(4) Decrease primarily attributed to decreased advertising in trade publications.

(5) Represents an overall reduction in travel across all business units and functional groups.

Research and development expenses increased $238,000, or 0.8%, to $31,636,000 in 2009 from
$31,398,000 in 2008. As a percentage of net revenues, research and development increased to 16.0% from
15.3%.

The components of the $238,000 increase were as follows (in thousands):

Project materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Picor non-recurring engineering charges . . . . . . . . . . . . . . . . . . . . . . . . . . .
Set-up and tooling expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Travel expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred costs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Increase (decrease)

$ 710
371
55
(83)
(380)
(666)
231

$ 238

19.5% (1)
(79.2)% (2)
38.0%
(30.2)%

(1.6)% (3)
(368.5)% (4)
4.5%

0.8%

(1) Increase primarily attributed to an increase in materials associated with the development of V*I Chip and

Picor products.

(2) The Picor business unit provides engineering services to BBU and V*I Chip to support certain manufactur-
ing processes and research and development activities. A decline in services related to manufacturing pro-
cesses resulted in an increase in the amount of charges allocated to research and development expense.

(3) Decrease primarily attributable to the workforce reduction completed in the first quarter of 2009.

32

(4) Decrease primarily attributed to an increase in deferred costs capitalized for certain non-recurring engi-

neering projects for which the related revenues have been deferred.

On January 14, 2009, senior management authorized and we announced a plan to reduce our workforce

by approximately eight percent by the end of January 2009. Senior management authorized additional
reductions to our workforce in the second and third quarters of 2009. We completed these reductions in
workforce and recorded pre-tax charges for severance and other employee-related costs of $4,099,000 for
2009.

During the third quarter of 2009, we entered into a release and settlement agreement with a vendor over
alleged product performance issues with certain product the vendor had sold to us. We received a payment of
$750,000 in consideration for the settlement, which is recorded in “Gain from litigation-related and other
settlements, net” in the accompanying Consolidated Statement of Operations. In addition, we completed
negotiations with Exar and Rohm, resulting in separate settlement agreements calling for a final payment to
Exar of $70,000 and no additional payment due Rohm. As a result of the settlements, we reversed a remaining
excess accrual of approximately $96,000 in the third quarter of 2009, which is recorded in “Gain from
litigation-related and other settlements, net” in the accompanying Consolidated Statement of Operations.

The major changes in the components of the “Other income, net” for the years ended December 31 were

as follows (in thousands):

2009

2008

Interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unrealized gain (loss) on trading securities . . . . . . . . . . . . . . . . . . .
Unrealized (loss) gain on auction rate securities rights . . . . . . . . . . .
Credit losses on available for sale securities . . . . . . . . . . . . . . . . . . .
Foreign currency gains, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gain on disposal of equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 717
1,268
(964)
(464)
35
30
60

$ 2,138
(2,238)
1,926
—
82
19
101

Increase
(decrease)

$(1,421)
3,506
(2,890)
(464)
(47)
11
(41)

$ 682

$ 2,028

$(1,346)

The decrease in interest income is due to lower average balances on our cash equivalents and short and
long-term investments as well as a decrease in interest rates. The unrealized gains (losses) and credit loss on
our auction rate securities and securities rights results from the change in fair value of these investments
during the period.

Income before income taxes was $5,455,000 in 2009 compared to $886,000 for 2008.

The provision for income taxes and the effective income tax rate for the years ended December 31 were

as follows (dollars in thousands):

2009

2008

Provision for income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $1,362
Effective income tax rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

25.0% 110.2%

$ 976

The lower effective income tax rate for the year ended December 31, 2009 compared to the same period
in 2008 is principally due an increase in income before income taxes from $886,000 in 2008 to $5,455,000 in
2009, with only a $386,000 increase in the provision for income taxes from 2008 to 2009. The provision for
income taxes was higher in 2009 than 2008 due to a reduction in tax reserves due to closing tax periods in
certain jurisdictions of $1,123,000 in 2008, partially offset by higher estimated federal and state income taxes
for one of the noncontrolling interests that is not part of our consolidated tax return in 2008 compared to
2009.

Loss from equity method investment (net of tax) decreased from $1,688,000 in 2008 to $0 in 2009. This
was principally due to the equity method investment in GWS being adjusted for a decline in value judged to

33

be other than temporary of $706,000 in the first quarter of 2008 and $555,000 in the fourth quarter,
respectively, the allocation of equity method losses for 2008, and bringing the investment balance in GWS to
zero as of December 31, 2008.

Net income of noncontrolling interest decreased $522,000 from $1,817,000 for 2008 to $1,295,000 in

2009. This was due to lower net income at certain entities in which we hold a noncontrolling interest.

Basic and diluted income (loss) per share attributable to Vicor Corporation was $0.07 for the year ended

December 31, 2009, compared to $(0.09) for the year ended December 31, 2008.

LIQUIDITY AND CAPITAL RESOURCES

At December 31, 2010, we had $49,279,000 in unrestricted cash and cash equivalents. The ratio of
current assets to current liabilities was 5.6:1 at December 31, 2010, compared to 4.6:1 at December 31, 2009.
Working capital increased $30,663,000 to $105,454,000 at December 31, 2010 from $74,791,000 at Decem-
ber 31, 2009. The primary factors affecting the working capital increase were increases in inventories of
$14,132,000, accounts receivable of $12,260,000, cash and cash equivalents of $9,055,000, deferred tax assets
of $1,983,000, as well as a decrease in deferred revenue of $1,832,000, offset by increases in accounts payable
of $2,541,000, accrued compensation and benefits of $1,032,000, as well a decreases in short term investments
of $2,583,000 and other current assets of $1,948,000. The primary source of cash for the year ended
December 31, 2010, was $16,894,000 from operating activities and $14,860,000 in net sales of short-term and
long-term investments. The primary use of cash for the year ended December 31, 2010 was $12,103,000 for
the purchase of equipment, $12,506,000 for the payments of common stock dividends, and $552,000 for the
payments of noncontrolling interest dividends, discussed below.

As of December 31, 2010, we held $19,075,000 of auction rate securities classified as long-term

investments. Please see Note 4 of the Consolidated Financial Statements for a discussion of the securities and
our accounting treatment thereof.

In November 2000, our Board of Directors authorized the repurchase of up to $30,000,000 of Common
Stock (the “November 2000 Plan”). The November 2000 Plan authorizes us to make such repurchases from
time to time in the open market or through privately negotiated transactions. The timing and amounts of stock
repurchases are at the discretion of management based on its view of economic and financial market
conditions. We did not repurchase shares of Common Stock during the year ended December 31, 2010. As of
December 31, 2010, we had approximately $8,541,000 remaining under the November 2000 Plan.

On June 28, 2010, our Board of Directors approved a cash dividend of $0.30 per share of the Company’s
common stock. The total dividend of approximately $12,506,000 was paid on July 30, 2010, to shareholders of
record at the close of business on July 16, 2010.

During the year ending December 31, 2010, three subsidiaries paid a total of $5,457,000 in dividends, of
which $552,000 was paid to outside shareholders. Dividends paid to outside shareholders are accounted for as
a reduction in noncontrolling interest.

The table below summarizes our contractual obligations as of December 31, 2010 (in thousands):

Contractual Obligations

Total

Operating lease obligations . . . . . . . . .
Purchase obligations . . . . . . . . . . . . . .

$2,607
1,332

Less than
1 Year

$1,264
305

$1,059
625

$3,939

$1,569

$1,684

$284
402

$686

$—
—

$—

Payments Due by Period

Years 2 & 3

Years 4 & 5

More Than
5 Years

We also have a contract with a third-party to supply nitrogen for our manufacturing and research and
development activities. Under the contract, we are obligated to pay a minimum of $300,000 annually, subject
to semi-annual price adjustments, through March 2015.

34

In addition to the amounts shown in the table above, approximately $958,000 of unrecognized tax benefits

have been recorded as liabilities, and we are uncertain as to if or when such amounts may be settled. Related
to these unrecognized tax benefits, we have also recorded a liability for potential interest and penalties of
approximately $77,000 on December 31, 2010.

Our primary liquidity needs are for making continuing investments in manufacturing equipment,
particularly equipment to increase capacity for our V*I Chip products and to upgrade equipment for BBU
production. We believe cash generated from operations and the total of its cash and cash equivalents and
short-term investments will be sufficient to fund planned operations and capital equipment purchases for the
foreseeable future. We have approximately $2,080,000 of capital expenditure commitments, principally for
manufacturing equipment, as of December 31, 2010.

Based on our ability to access cash and other short-term investments and our expected operating cash
flows, we do not anticipate that the current lack of liquidity of our auction rate securities will affect our ability
to execute our current operating plan.

We do not consider the impact of inflation and changing prices on our business activities or fluctuations

in the exchange rates for foreign currency transactions to have been significant during the last three fiscal
years.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We are exposed to a variety of market risks, including changes in interest rates affecting the return on our

cash and cash equivalents and short-term investments and fluctuations in foreign currency exchange rates. As
our cash and cash equivalents consist principally of money market securities, which are short-term in nature,
we believe our exposure to market risk on interest rate fluctuations for these investments is not significant.
Our short-term and long-term investments consist mainly of municipal and corporate debt securities, of which
the Failed Auction Securities represent a significant portion. While the Failed Auction Securities are all highly
rated investments, generally with AAA/Aaa ratings, continued failure to sell at their reset dates could
negatively impact the carrying value of the investments, in turn leading to impairment charges in future
periods. Changes in the fair value of the Failed Auction Securities attributable to credit loss are recorded
through earnings, with the remainder of any change recorded in “Accumulated other comprehensive (loss)
income.” Should a decline in the value of the Failed Auction Securities be other than temporary, the losses
would be recorded in “Other income (expense), net.” We do not believe there was an “other-than-temporary”
decline in value in these securities as of December 31, 2010. We estimate that our annual interest income
would change by approximately $1,200,000 in 2010 for each 100 basis point increase or decrease in interest
rates.

Our exposure to market risk for fluctuations in foreign currency exchange rates relates primarily to the
operations of VJCL and changes in the dollar/yen exchange rate, as the functional currency of our subsidiaries
in Europe and Hong Kong is the U.S. dollar. Therefore, we believe market risk is mitigated since these
operations are not materially exposed to foreign exchange fluctuations. Relative to foreign currency exposure
against the yen existing on December 31, 2010, we estimate that a 10% unfavorable movement in the dollar/
yen exchange rate would increase foreign currency loss by approximately $157,000.

35

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

INDEX

FINANCIAL STATEMENTS
Report of Independent Registered Public Accounting Firm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consolidated Balance Sheets as of December 31, 2010 and December 31, 2009 . . . . . . . . . . . . . . . . . . .
Consolidated Statements of Operations For The Years Ended December 31, 2010, 2009, and 2008 . . . . .
Consolidated Statements of Cash Flows For The Years Ended December 31, 2010, 2009, and 2008 . . . . .
Consolidated Statements of Equity For The Years Ended December 31, 2010, 2009, and 2008 . . . . . . . .
Notes to the Consolidated Financial Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Schedule (Refer to Item 15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Page

37
38
39
40
41
42
77

36

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Stockholders of
Vicor Corporation:

We have audited the accompanying consolidated balance sheets of Vicor Corporation (a Delaware
Corporation) and its subsidiaries (collectively, the “Company”) as of December 31, 2010 and 2009, and the
related consolidated statements of operations, equity, and cash flows for each of the three years in the period
ended December 31, 2010. Our audits of the basic financial statements included the financial statement
schedule listed in the index appearing under Item 15(a)(2). These financial statements and financial statement
schedule are the responsibility of the Company’s management. Our responsibility is to express an opinion on
these financial statements and financial statement schedule based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight

Board (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 financial position of Vicor Corporation and subsidiaries as of December 31, 2010 and 2009, and
the results of their operations and their cash flows for the three years in the period ended December 31, 2010
in conformity with accounting principles generally acceptable in the United States of America. 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.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight

Board (United States), Vicor Corporation and subsidiaries’ internal control over financial reporting as of
December 31, 2010, based on criteria established in Internal Control-Integrated Framework issued by the
Committee of Sponsoring Organizations of the Treadway Commission (COSO) and our report dated March 3,
2011 expressed an unqualified opinion thereon.

/s/ Grant Thornton LLP

Boston, Massachusetts
March 3, 2011

37

VICOR CORPORATION

CONSOLIDATED BALANCE SHEETS
December 31, 2010 and 2009
(In thousands, except per share data)

ASSETS

Current assets:

Cash and cash equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Restricted cash equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Short-term investments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accounts receivable, less allowance of $309 in 2010 and $260 in 2009 . . . . . . . . . .
Inventories, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred tax assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other current assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total current assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Restricted cash and cash equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Long-term investments, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Auction rate securities rights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Property, plant and equipment, net
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Long-term deferred tax assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LIABILITIES AND EQUITY

Current liabilities:

Accounts payable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accrued compensation and benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accrued expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accrued severance charges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income taxes payable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total current liabilities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Long-term deferred revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Long-term income taxes payable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Commitments and contingencies (Note 15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equity:

Vicor Corporation stockholders’ equity:

Preferred Stock, $.01 par value, 1,000,000 shares authorized; no shares issued

Class B Common Stock: 10 votes per share, $.01 par value, 14,000,000 shares
authorized, 11,767,052 shares issued and outstanding . . . . . . . . . . . . . . . . . . .

Common Stock: 1 vote per share, $.01 par value, 62,000,000 shares authorized

38,400,897 shares issued and 30,002,499 shares outstanding
(38,296,408 shares issued and 29,898,010 shares outstanding in 2009) . . . . . . .
Additional paid-in capital
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Retained earnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accumulated other comprehensive loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Treasury stock at cost: 8,398,398 shares in 2010 and 2009 . . . . . . . . . . . . . . . . .
Total Vicor Corporation stockholders’ equity . . . . . . . . . . . . . . . . . . . . . . . . .
Noncontrolling interest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2010

2009

$ 49,279
—
—
38,825
35,489
2,164
2,397
128,154
—
18,417
—
50,848
2,805
4,688
$ 204,912

$ 11,999
6,772
3,138
—
102
689
22,700
2,178
1,022
—
—

$ 40,224
192
2,583
26,565
21,357
181
4,345
95,447
223
29,995
962
49,009
—
4,941
$ 180,577

$

9,458
5,740
2,618
259
60
2,521
20,656
2,196
384
1,275
—

118

118

385
163,933
133,791
(1,369)
(121,827)
175,031
3,981
179,012
$ 204,912

384
161,746
112,972
(1,608)
(121,827)
151,785
4,281
156,066
$ 180,577

See accompanying notes.

38

VICOR CORPORATION

CONSOLIDATED STATEMENTS OF OPERATIONS
Years ended December 31, 2010, 2009 and 2008
(In thousands, except per share amounts)

Net revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cost of revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$250,733
136,213

$197,959
110,365

$205,368
119,083

Gross margin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

114,520

87,594

86,285

2010

2009

2008

Operating expenses:

Selling, general and administrative. . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Research and development
Severance charges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gain from litigation-related and other settlements, net . . . . . . . . . . . . .

Total operating expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Income (loss) from operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other income, net:

Total other than temporary impairment (losses) gains on

available-for-sale securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Portion of gains (losses) recognized in other comprehensive income . . .

Net impairment losses recognized in earnings. . . . . . . . . . . . . . . . . .
Other income, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total other income, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Income before income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(Benefit) provision for income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loss from equity method investment (net of tax) . . . . . . . . . . . . . . . . . . .

Consolidated net income (loss) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Less: Net income attributable to noncontrolling interest . . . . . . . . . .

49,417
35,981
—
—

85,398

29,122

(271)
125

(146)
643

497

29,619
(3,920)
—

33,539
214

47,932
31,636
4,099
(846)

82,821

4,773

759
(1,223)

(464)
1,146

682

5,455
1,362
—

4,093
1,295

56,206
31,398
—
(177)

87,427

(1,142)

—
—

—
2,028

2,028

886
976
1,688

(1,778)
1,817

Net income (loss) attributable to Vicor Corporation . . . . . . . . . . . . . . . . .

$ 33,325

$

2,798

$ (3,595)

Net income (loss) per common share attributable to Vicor Corporation:

Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$
$

0.80
0.80

$
$

0.07
0.07

$
$

(0.09)
(0.09)

Shares used to compute net income (loss) per common share attributable

to Vicor Corporation:
Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cash dividends declared per share . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

41,700
41,772
0.30

$

41,665
41,671

$

— $

41,651
41,651
0.30

See accompanying notes.

39

VICOR CORPORATION

CONSOLIDATED STATEMENTS OF CASH FLOWS
Years ended December 31, 2010, 2009 and 2008
(In thousands)

Operating activities:

Consolidated net income (loss) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustments to reconcile consolidated net income (loss)

$ 33,539

$ 4,093

$ (1,778)

2010

2009

2008

to net cash provided by operating activities:
Depreciation and amortization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unrealized (gain) loss on trading securities . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unrealized loss on auction rate security rights . . . . . . . . . . . . . . . . . . . . . . . . . .
Stock compensation expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gain on disposal of equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Excess tax benefit of share-based compensation. . . . . . . . . . . . . . . . . . . . . . . . .
Credit loss on available for sale securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(Decrease) increase in long-term deferred revenue . . . . . . . . . . . . . . . . . . . . . . .
Severance charges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unrealized gain on acquisition of auction rate security rights . . . . . . . . . . . . . . .
Loss from equity method investee (net of tax) . . . . . . . . . . . . . . . . . . . . . . . . . .
Change in current assets and liabilities, net . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net cash provided by operating activities . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Investing activities:

Purchases of investments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sales and maturities of investments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Additions to property, plant and equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Purchase of equity method investment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Proceeds from sale of equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Change in restricted cash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Decrease (increase) in other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net cash provided by (used in) investing activities . . . . . . . . . . . . . . . . . . . . .

Financing activities:

Proceeds from issuance of Common Stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Common stock dividends paid. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Noncontrolling interest dividends paid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Excess tax benefit of share-based compensation . . . . . . . . . . . . . . . . . . . . . . . . . .
Net cash used in financing activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Effect of foreign exchange rates on cash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net increase in cash and cash equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cash and cash equivalents at beginning of period . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cash and cash equivalents at end of period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Change in assets and liabilities:

Accounts receivable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inventories, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other current assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accounts payable and accrued liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accrued severance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accrual for litigation settlement
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income taxes payable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10,222
(6,274)
(970)
962
871
(249)
(213)
146
(18)
—
—
—
(21,122)
16,894

(908)
15,768
(12,103)
—
421
415
172
3,765

1,104
(12,506)
(552)
213
(11,741)
137
9,055
40,224
$ 49,279

(11,926)
(13,928)
2,050
3,881
(259)
—
892
(1,832)
$(21,122)

10,198
(74)
(1,268)
964
657
(30)
—
464
1,078
4,099
—
—
4,617
24,798

(1,695)
6,650
(10,643)
—
32
322
(572)
(5,906)

10,515
127
2,238
—
1,121
(22)
—
—
1,076
—
(1,926)
1,688
(3,976)
9,063

(11,574)
28,004
(8,265)
(1,000)
25
215
(229)
7,176

—
202
— (12,494)
(1,168)
—
(13,460)
(157)
2,622
20,017
$ 22,639

(1,269)
—
(1,269)
(38)
17,585
22,639
$ 40,224

2,148
5,291
(2,065)
2,550
(3,840)
(162)
(1,164)
1,859
$ 4,617

3,684
(3,311)
559
(4,410)
—
(78)
(141)
(279)
$ (3,976)

Supplemental disclosures:

Cash paid during the year for income taxes, net of refunds . . . . . . . . . . . . . . . . . . .

$ 1,113

$ 3,122

$

602

See accompanying notes.

40

VICOR CORPORATION

CONSOLIDATED STATEMENTS OF EQUITY
Years Ended December 31, 2010, 2009 and 2008
(In thousands)

Class B
Common
Stock

Common
Stock

Additional
Paid-In
Capital

Retained
Earnings

Accumulated
Other
Comprehensive
Income (Loss)

Treasury
Stock

Total
Vicor
Corporation
Stockholders’
Equity

Noncontrolling
Interest

Total
Equity

Balance on December 31, 2007 . . . . . . . . . .

$118

$384

$159,332 $126,263

$

170

$(121,827)

$164,440

$ 4,040

$168,480

Sales of Common Stock . . . . . . . . . . . . . . .
Common stock dividends paid . . . . . . . . . . .

Noncontrolling interest dividends paid . . . . . .

Stock-based compensation expense . . . . . . . .
Noncontrolling interest adjustment(1) . . . . . . .

Net loss . . . . . . . . . . . . . . . . . . . . . . . .

Unrealized loss on investments . . . . . . . . . . .
Currency translation adjustments, net of tax of

$226 . . . . . . . . . . . . . . . . . . . . . . . . .

Comprehensive loss . . . . . . . . . . . . . . . . .

Balance on December 31, 2008 . . . . . . . . . .
Noncontrolling interest dividends paid . . . . . .

Stock-based compensation expense . . . . . . . .

Net income . . . . . . . . . . . . . . . . . . . . . .
Unrealized gain on investments . . . . . . . . . .

Currency translation adjustments, net of tax of

$30 . . . . . . . . . . . . . . . . . . . . . . . . . .

Comprehensive income . . . . . . . . . . . . . . .

202

1,121
434

(12,494)

(3,595)

(3,314)

377

202
(12,494)

1,121
434

(3,595)

(3,314)

377

(6,532)

118

384

161,089

110,174

(2,767)

(121,827)

147,171

657

2,798

1,223

(64)

657

2,798
1,223

(64)

3,957

(1,168)

(434)

1,817

4,255
(1,269)

1,295

202
(12,494)

(1,168)

1,121
—

(1,778)

(3,314)

377

(4,715)

151,426
(1,269)

657

4,093
1,223

(64)

5,252

384

1

Balance on December 31, 2009 . . . . . . . . . .

118

Sales of Common Stock . . . . . . . . . . . . . . .
Common stock dividends paid . . . . . . . . . . .

Noncontrolling interest dividend paid . . . . . . .

Excess tax benefit of share-based

compensation . . . . . . . . . . . . . . . . . . . .
Stock-based compensation expense . . . . . . . .

Net income . . . . . . . . . . . . . . . . . . . . . .

Unrealized gain on investments . . . . . . . . . .
Currency translation adjustments, net of tax of

$169 . . . . . . . . . . . . . . . . . . . . . . . . .

Comprehensive income . . . . . . . . . . . . . . .

161,746

112,972

(1,608)

(121,827)

151,785

4,281

156,066

1,103

(12,506)

213
871

33,325

(123)

362

1,104
(12,506)

213
871

33,325

(123)

362

33,564

1,104
(12,506)

(552)

213
871

33,539

(125)

402

33,816

(552)

214

(2)

40

252

Balance on December 31, 2010 . . . . . . . . . .

$118

$385

$163,933 $133,791

$(1,369)

$(121,827)

$175,031

$ 3,981

$179,012

(1) A noncontrolling interest had a redemption of preferred stock that resulted in a $434,000 adjustment to Additional Paid-In-Capital.

See accompanying notes.

41

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. DESCRIPTION OF BUSINESS

Vicor Corporation (the “Company” or “Vicor”) designs, develops, manufactures and markets modular
power converters, power system components, and power systems. 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 their contract manufacturers, and smaller, lower volume users
which are broadly distributed across several major market areas.

2. SIGNIFICANT ACCOUNTING POLICIES

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. Certain of the Company’s
Vicor Custom Power entities are not majority owned by the Company. These entities are consolidated by the
Company as management believes that the Company has the ability to exercise control over their activities and
operations.

Revenue recognition

Product revenue is recognized in the period when persuasive evidence of an arrangement with a customer

exists, the products are shipped and title has transferred to the customer, the price is fixed or determinable,
and collection is considered probable. License fees are recognized as earned. The Company recognizes revenue
on such arrangements only when the contract is signed, the license term has begun, all obligations have been
delivered to the customer, and collection is probable. The Company evaluates revenue arrangements with
potential multi-element deliverables to determine if there is more than one unit of accounting. A deliverable
constitutes a separate unit of accounting when it has standalone value and there are no customer-negotiated
refund or return rights for the undelivered elements. The selling price for each deliverable is based on vendor-
specific objective evidence (“VSOE”) if available, third-party evidence (“TPE”) if VSOE is not available, or
best estimate of selling price (“BESP”) if neither VSOE or TPE is available.

The Company enters into arrangements containing multiple elements which may include a combination of

non-recurring engineering services (“NRE”), prototype units and production units. The Company has
determined that the NRE and prototype units represent one unit of accounting and the production units a
separate unit of accounting, based on an assessment of the respective standalone value. When possible, revenue
is allocated to the elements based on VSOE or TPE for each element. For arrangements where VSOE or TPE
cannot be established, the Company uses BESP for the allocation of arrangement consideration. The objective
of BESP is to determine the price at which the Company would typically transact a standalone sale of the
product or service. BESP is determined by considering a number of factors including the Company’s pricing
policies, internal costs and gross margin objectives, current market conditions, information gathered from
experience in customer negotiations and the competitive landscape.

The Company defers revenue recognition for the NRE and prototype units until completion of the final
milestone under the NRE arrangement. Recognition generally takes place within six to twelve months of the
initiation of the arrangement. Revenue for the production units is recognized upon shipment, as for product
revenue, as summarized above. For certain multiple-element arrangements entered into prior to January 1,
2009 which contained a combination of technical support services, NRE, minimum license payments and
future royalties, separate units of accounting could not be established. Therefore, revenue under these
arrangements is deferred and recognized over the term of the arrangement. During 2010, 2009 and 2008,
revenue recognized under multi-element arrangements accounted for less than 3% of net revenues.

42

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Foreign currency translation

The financial statements of Vicor Japan Company, Ltd. (“VJCL”), a majority owned subsidiary, for which

the functional currency is the Japanese yen, have been translated into U.S. dollars using the exchange rate in
effect at the balance sheet date for balance sheet amounts and the average exchange rates in effect during the
year for income statement amounts. The gains and losses resulting from the changes in exchange rates from
year to year have been reported in other comprehensive income.

Transaction gains and losses and translation gains (losses) resulting from the remeasurement of foreign

currency denominated assets and liabilities of the Company’s foreign subsidiaries where the functional
currency is the U.S. dollar are included in other income, net. Foreign currency gains (losses) included in other
income, net, were approximately ($158,000), $35,000, and $82,000 in 2010, 2009 and 2008, respectively.

Cash and cash equivalents

Cash and cash equivalents include funds held in checking and money market accounts, certificates of
deposit and debt securities with maturities of less than three months at the time of purchase. Cash and cash
equivalents are valued at cost which approximates market value. The Company’s money market securities,
which are classified as cash equivalents on the balance sheet, 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.

Restricted cash and short-term investments

Restricted cash and short-term investments represent the amount of cash and short-term investments

required to be set aside as a guarantee for certain foreign letters of credit.

Short-term and long-term investments

The Company’s principal sources of liquidity are its existing balances of cash, cash equivalents and short-
term investments, as well as cash generated from operations. Consistent with the Company’s investment policy
guidelines, the Company can invest, and has historically invested, its cash balances in demand deposit
accounts, money market funds, brokered certificates of deposit and auction rate securities meeting certain
quality criteria. All of the Company’s investments are subject to credit, liquidity, market, and interest rate risk.

The Company’s short-term and long-term investments are classified as either available-for-sale or trading
securities. Available-for-sale securities are recorded at fair value, with unrealized gains and losses, net of tax,
attributable to credit loss recorded through the statement of operations and unrealized gains and losses, net of
tax, attributable to other non-credit factors recorded in “Accumulated other comprehensive loss”, a component
of Stockholders’ Equity. In determining the amount of credit loss, the Company compares the present value of
cash flows expected to be collected to the amortized cost basis of the securities, considering, among other
factors, credit default risk probabilities and changes in credit ratings as significant inputs. Trading securities
are recorded at fair value, with unrealized gains and losses recorded through the Consolidated Statements of
Operations each reporting period.

The amortized cost of debt securities is adjusted for amortization of premiums and accretion of discounts

to maturity, the net amount of which, along with interest and realized gains and losses, is included in “Other
income, net” in the Consolidated Statements of Operations. The Company periodically evaluates investments
to determine if impairment is required, whether an impairment is other than temporary, and the measurement
of an impairment loss. The Company considers a variety of impairment indicators such as, but not limited to,
a significant deterioration in the earnings performance, credit rating, or asset quality of the investment.

43

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Fair value measurements

The Company accounts for certain financial assets at fair value, defined as the price that would be
received to sell an asset or paid to transfer a liability (i.e., an exit price) in the principal or most advantageous
market for the asset or liability in an orderly transaction between market participants on the measurement date.
As such, fair value is a market-based measurement that should be determined based on assumptions that
market participants would use in pricing an asset or liability. A three-level hierarchy is used to show the extent
and level of judgment used to estimate fair value measurements:

Level 1

Level 2

Inputs used to measure fair value are unadjusted quoted prices available in active markets for
the identical assets or liabilities as of the reporting date.

Inputs used to measure fair value, other than quoted prices included in Level 1, are either
directly or indirectly observable as of the reporting date through correlation with market data,
including quoted prices for similar assets and liabilities in active markets and quoted prices
in inactive markets. Level 2 also includes assets and liabilities valued using models or other
pricing methodologies that do not require significant judgment since the input assumptions
used in the models, such as interest rates and volatility factors, are corroborated by readily
observable data from actively quoted markets for substantially the full term of the financial
instrument.

Level 3

Inputs used to measure fair value are unobservable inputs supported by little or no market
activity and reflect the use of significant management judgment. These values are generally
determined using pricing models for which the assumptions utilize management’s estimates
of market participant assumptions.

The Company uses the fair value option for certain financial assets, which allows an entity the irrevocable

option to elect fair value for the initial and subsequent measurement for specified financial assets and
liabilities on a case-by-case basis.

Allowance for doubtful accounts

The Company maintains allowances for doubtful accounts for estimated losses resulting from the inability

of its customers to make required payments, based on assessments of customers’ credit-risk profiles and
payment histories. If the financial condition of the Company’s customers were to deteriorate, resulting in an
impairment of their ability to make payments, additional allowances may be required. The Company does not
require collateral from its customers.

Inventories

Inventories are valued at the lower of cost (determined using the first-in, first-out method) or net

realizable value. The Company provides reserves for inventories estimated to be excess, obsolete or unmarket-
able. The Company’s estimation process for assessing net realizable value is based upon its known backlog,
projected future demand and expected market conditions. If the Company’s estimated demand and/or market
expectation were to change or if product sales were to decline, the Company’s estimation process may cause
larger inventory reserves to be recorded, resulting in larger charges to cost of revenues.

Concentrations of credit risk

Financial instruments that potentially subject the Company to significant concentrations of credit risk
consist principally of cash and cash equivalents, short-term and long-term investments and trade accounts
receivable. The Company maintains cash and cash equivalents and certain other financial instruments with
various financial institutions. The Company’s short-term and long-term investments consist of highly rated

44

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(AAA/Aaa) municipal and corporate debt securities in which a significant portion are invested in auction rate
securities. As of December 31, 2010, the Company was holding a total of approximately $19,075,000 in
auction rate securities, the significant majority of which are student loan backed securities. Through
December 31, 2010, auctions held for all of the Company’s auction rate securities have failed. The funds
associated with auction rate securities that have failed auction may not be accessible until a successful auction
occurs, a buyer is found outside of the auction process, the security is called, or the underlying securities have
matured. If the credit rating of the issuer of any auction rate security held deteriorates, the Company may be
required to adjust the carrying value of the investment for an other-than-temporary decline in value through an
impairment charge. The Company’s investment policy, approved by the Board of Directors, limits the amount
the Company may invest in any issuer, thereby reducing credit risk concentrations. Concentrations of credit
risk with respect to trade accounts receivable are limited due to the number of entities comprising the
Company’s customer base. As of December 31, 2010, one customer accounted for approximately 10.7% of
trade account receivables. Credit losses have consistently been within management’s expectations.

Goodwill, other intangible assets, and long-lived assets

The Company performs a test of goodwill for potential impairment at least annually. Values assigned to

patents are amortized using the straight-line method over periods ranging from three to twenty years.

Long-lived assets such as property, plant and equipment and 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 suggest any impairment in the value
of long-lived assets recorded in the accompanying Consolidated Financial Statements.

Other investments

The Company accounts for its investment in Great Wall Semiconductor Corporation (“GWS”) under the

equity method of accounting.

Advertising expense

The cost of advertising is expensed as incurred. The Company incurred $2,378,000, $1,969,000 and

$2,735,000 in advertising costs during 2010, 2009 and 2008, respectively.

Product warranties

The Company generally offers a two-year warranty for all of its products. The Company provides for the

estimated cost of product warranties at the time product revenue is recognized. Factors that affect the
Company’s warranty reserves include the number of units sold, historical and anticipated rates of warranty
returns and the cost per return. The Company periodically assesses the adequacy of the warranty reserves and
adjusts the amounts as necessary. Warranty obligations are included in “Accrued expenses” in the accompany-
ing Consolidated Balance Sheets.

Net income (loss) per common share

The Company computes basic earnings per share using the weighted average number of common shares
outstanding and diluted earnings per share using the weighted average number of common shares outstanding
plus the effect of outstanding dilutive stock options, if any. The following table sets forth the computation of

45

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

basic and diluted income (loss) per share for the years ended December 31 (in thousands, except per share
amounts):

Numerator:

Net income (loss) attributable to Vicor Corporation. . . . . . . . . . .

$33,325

$ 2,798

$ (3,595)

2010

2009

2008

Denominator:

Denominator for basic income (loss) per share-weighted average
shares(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Effect of dilutive securities:
Employee stock options(2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Denominator for diluted income (loss) per share — adjusted

41,700

41,665

41,651

72

6

—

weighted-average shares and assumed conversions(3) . . . . . . . .

41,772

41,671

41,651

Basic income (loss) per share . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 0.80

$ 0.07

$ (0.09)

Diluted income (loss) per share . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 0.80

$ 0.07

$ (0.09)

(1) Denominator represents weighted average number of Common Shares and Class B Common Shares

outstanding.

(2) Options to purchase 345,998 and 720,823 shares of Common Stock were outstanding in 2010 and 2009,
respectively, 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. Options to purchase 1,084,175 shares of Common Stock in 2008 were not
included in the calculation of net loss per share as the effect would have been antidilutive.

(3) Denominator represents weighted average number of Common Shares and Class B Common Shares out-

standing for the year, adjusted to include the dilutive effect, if any, of outstanding options.

Income taxes

Deferred tax assets and liabilities are determined based on the differences between financial reporting and

tax bases of assets and liabilities and are measured using the enacted income tax rates and laws that are
expected to be in effect when the temporary differences are expected to reverse. Deferred tax assets are
reduced by a valuation allowance if it is more likely than not that some portion or all of the deferred tax
assets will not be realized. Additionally, deferred tax assets and liabilities are separated into current and
noncurrent amounts based on the classification of the related assets and liabilities for financial reporting
purposes or the expected reversal.

The Company follows a two-step process to determine the amount of tax benefit to recognize. First, the
tax position must be evaluated to determine the likelihood that it will be sustained upon examination by a tax
authority. If the tax position is deemed “more-likely-than-not” to be sustained, the tax position is then assessed
to determine the amount of benefit to recognize in the financial statements. The amount of the benefit that
may be recognized is the largest amount that has a greater than 50 percent likelihood of being realized upon
ultimate settlement. If the tax position does not meet the “more-likely-than-not” threshold then it is not
recognized in the financial statements. Additionally, the Company accrues interest and penalties, if any, related
to unrecognized tax benefits as a component of income tax expense.

46

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Stock-based compensation

The Company uses the Black-Scholes option-pricing model to calculate the grant-date fair value of stock

option awards. The resulting compensation expense, net of expected forfeitures, for non performance-based
stock options is recognized on a straight-line basis over the service period of the award, which is generally
five years for stock options. For stock options with performance-based vesting provisions, recognition of
compensation expense, net of expected forfeitures, commences if and when the achievement of the
performance criteria is deemed probable. The compensation expense, net of expected forfeitures, for
performance-based stock options is recognized over the relevant performance period.

Use of estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the

United States requires management to make estimates and assumptions that affect the reported amounts of
assets and liabilities and disclosure of contingencies at the date of the financial statements and the reported
amounts of revenue and expenses during the reporting period. Such estimates relate to the useful lives of fixed
assets and identified intangible assets, fair value of short and long-term investments, allowances for doubtful
accounts, the net realizable value of inventory, potential reserves relating to litigation matters, accrued
liabilities, accrued taxes, deferred tax valuation allowances, assumptions pertaining to share-based payments
and other reserves. Actual results could differ from those estimates, and such differences may be material to
the financial statements.

Comprehensive (loss) income

The components of comprehensive income (loss) include, in addition to net income (loss), unrealized
gains and losses on investments, net of tax and foreign currency translation adjustments related to VJCL.

Impact of recently issued accounting standards

Effective January 1, 2010, the Company adopted new accounting guidance related to the Consolidation of

Variable Interest Entities. The new accounting standard replaces the quantitative-based risks and rewards
calculation for determining which enterprise, if any, has a controlling financial interest in a variable interest
entity with an approach focused on identifying which enterprise has the power to direct the activities of a
variable interest entity that most significantly impact the entity’s economic performance and (1) the obligation
to absorb losses of the entity or (2) the right to receive benefits from the entity. The new standard also
provides additional reconsideration events for determining whether an entity is a variable interest entity and
requirements for ongoing assessments of whether an enterprise is the primary beneficiary of a variable interest
entity. The adoption of this new accounting guidance did not have a material effect on the Company’s financial
position or results of operations.

Effective January 1, 2010, the Company adopted new accounting guidance on fair value measurements
and disclosures. The new guidance requires more robust disclosures about (1) the different classes of assets
and liabilities measured at fair value, (2) the valuation techniques and inputs used, (3) the activity in Level 3
fair value measurements, and (4) the transfers between Levels 1, 2, and 3. The adoption of this new accounting
guidance did not have a material effect on the Company’s financial position or results of operations.

47

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

3. STOCK-BASED COMPENSATION AND EMPLOYEE BENEFIT PLANS

Vicor currently grants stock options under the following equity compensation plans that are shareholder-

approved:

Amended and Restated 2000 Stock Option and Incentive Plan (the ‘‘Vicor 2000 Plan”) — Under the
Vicor 2000 Plan, the Board of Directors or the Compensation Committee of the Board of Directors may
grant 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. Discretionary awards of stock options to non-employee directors shall be in lieu of any
automatic grant of stock options under the Company’s 1993 Stock Option Plan (the “Vicor 1993 Plan”)
and the Company’s 1998 Stock Option and Incentive Plan (the “Vicor 1998 Plan”). 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 4,000,000 shares of Common Stock have been reserved for issuance under the Vicor 2000 Plan.
The period of time during which an option may be exercised and the vesting periods are determined by
the Compensation Committee. The term of each option may not exceed ten years from the date of grant.

1998 Stock Option and Incentive Plan (the “Vicor 1998 Plan”) — The Vicor 1998 Plan permitted
the grant of share options to its employees and other key persons, including non-employee directors for
the purchase of up to 2,000,000 shares of common stock. As a result of the approval of the Vicor 2000
Plan, no further grants were made under the Vicor 1998 Plan.

1993 Stock Option Plan (the “Vicor 1993 Plan”) — The Vicor 1993 Plan permitted the grant of
share options to its employees and non-employee directors for the purchase of up to 4,000,000 shares of
common stock. As a result of the approval of the Vicor 2000 Plan, no further grants were made under the
1993 Plan.

Picor Corporation (“Picor”), a privately held majority-owned subsidiary of Vicor, currently grants stock

options under the following equity compensation plan that has been approved by its Board of Directors:

2001 Stock Option and Incentive Plan, as amended (the “2001 Picor Plan”) — The 2001 Picor Plan

permits the grant of share options to its employees and other key persons, including non-employee
directors and full or part-time officers, for the purchase of up to 80,000,000 shares of common stock.

V*I Chip Corporation (“V*I Chip”), a privately held wholly-owned subsidiary of Vicor, currently grants
stock options under the following equity compensation plan that has been approved by its Board of Directors:

2007 Stock Option and Incentive Plan, as amended (the “2007 V*I Chip Plan”) — The 2007 V*I Chip

Plan permits the grant of share options to its employees and other key persons, including non-employee
directors and full or part-time officers, for the purchase of up to 100,000,000 shares of common stock.

All non performance-based option awards are granted at an exercise price equal to or greater than the
market price for Vicor at the date of the grant, and are granted at a price equal to or greater than the estimated
fair value for both Picor and V*I Chip at the date of grant. Options generally vest over various periods of up
to five years and may be exercised for up to 10 years from the date of grant, which is the maximum
contractual term. The Company uses the graded attribution method to recognize expense for all stock-based
awards.

During the third quarter of 2010, the Company granted 1,243,750 non-qualified stock options under the
Vicor 2000 Plan, with performance-based vesting provisions tied to achievement of certain quarterly revenue
targets by the Brick Business Unit. Under the accounting rules for performance-based awards, the Company is

48

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

required to assess, on an ongoing basis, the probability of whether the performance criteria will be achieved. If
and when achievement is deemed probable, the Company will begin to recognize the associated compensation
expense for the stock options over the relevant performance period. As of December 31, 2010, the Company
determined that it was not probable that the revenue targets could be achieved and, accordingly, has not
recorded compensation expense relating to these options since the grant date. The unrecognized compensation
expense of these performance-based options was approximately $7,790,000 as of December 31, 2010. The fair
value for the options was estimated at the date of grant using the Black Scholes option pricing model.

On December 31, 2010, the Company granted 2,984,250 non-qualified stock options under the 2007 V*I
Chip Plan with performance-based vesting provisions tied to achievement of certain margin targets by the V*I
Chip Business Unit. As of December 31, 2010, the Company determined that it was probable that the margin
targets could be achieved and, accordingly, will begin recording compensation expense relating to these options
beginning January 1, 2011. The unrecognized compensation expense of these performance-based options was
approximately $1,481,000 as of December 31, 2010. The fair value for the options was estimated at the date
of grant using the Black Scholes option pricing model.

Stock compensation expense for the years ended December 31 was as follows (in thousands):

Cost of revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selling, general and administrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Research and development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 19
618
234

Total stock based compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$871

$ 20
456
181

$657

$

52
818
251

$1,121

2010

2009

2008

The fair value for the options was estimated at the date of grant using a Black-Scholes option pricing

model under all methods with the following weighted-average assumptions:

Vicor:

Risk-free interest rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Expected dividend yield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Expected volatility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Expected lives (years) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Non Performance-
based Stock
Options
2009

2010

2008

2.3% 1.1% 2.8%
1.6% 1.0% 2.6%
54% 67% 47%
3.9

3.1

2.7

Performance-
based Stock
Options(1)
2010

2.0-2.7%
2.5%
55%

6.5-9.5

V*I Chip:

2010

2009(2)

2008

2010

Risk-free interest rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Expected dividend yield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . —
Expected volatility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Expected lives (years) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.7% —
—
49% —
—
6.5

—

3.7% 2.7%
—
61% 49%
6.5

6.5

Picor:

2010

2009(2)

2008

Risk-free interest rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Expected dividend yield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . —
Expected volatility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Expected lives (years) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.0% —
—
52% —
—
6.5

3.7%
—
56%
6.5

(1) There were no Vicor or V*I Chip performance-based options granted prior to 2010.

(2) There were no Picor or V*I Chip options granted during 2009.

49

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Risk-free interest rate:

Vicor — The Company uses the yield on zero-coupon U.S. Treasury “Strip” securities for a period that is

commensurate with the expected term assumption for each vesting period.

Picor — The Company uses the yield to maturity of a seven-year U.S. Treasury bond, as it most closely

aligns to the expected exercise period.

V*I Chip — The Company uses the yield to maturity of a seven-year U.S. Treasury bond, as it most

closely aligns to the expected exercise period.

Expected dividend yield:

Vicor — The Company determines the expected dividend yield by annualizing the most recent prior cash
dividends declared by the Company’s Board of Directors and dividing that result by the closing stock price on
the date of that dividend declaration. Dividends are not paid on options.

Picor — Picor has not and does not expect to declare and pay dividends in the foreseeable future.

Therefore, the expected dividend yield is not applicable.

V*I Chip — V*I Chip has not and does not expect to declare and pay dividends in the foreseeable future.

Therefore, the expected dividend yield is not applicable.

Expected volatility:

Vicor — Vicor uses historical volatility to estimate the grant-date fair value of the options, using the
expected term for the period over which to calculate the volatility (see below). The Company does not expect
its future volatility to differ from its historical volatility. The computation of the Company’s volatility is based
on a simple average calculation of monthly volatilities over the expected term.

Picor — As Picor is a nonpublic entity, historical volatility information is not available. An industry
sector index of seven publicly traded fabless semiconductor firms was developed for calculating historical
volatility for Picor. Historical prices for each of the companies in the index based on the market price of the
shares on each day of trading over the expected term were used to determine the historical volatility.

V*I Chip — As V*I Chip is a nonpublic entity, historical volatility information is not available. An

industry sector index of twelve publicly traded fabless semiconductor firms was developed for calculating
historical volatility for V*I Chip. Historical prices for each of the companies in the index based on the market
price of the shares on each day of trading over the expected term were used to determine the historical
volatility.

Expected term:

Vicor — The Company uses historical employee exercise and option expiration data to estimate the

expected term assumption for the Black-Scholes grant-date valuation. The Company believes that this
historical data is currently the best estimate of the expected term of options, and that generally all groups of
the Company’s employees exhibit similar exercise behavior.

Picor and V*I Chip— Due to the lack of historical information, the “simplified” method as prescribed by

the Security and Exchange Commission was used to determine the expected term on grant awards that meet
the definition of “plain vanilla”. For options that did not meet the criteria of “plain vanilla”, the Company
calculated the expected term based on its best estimate of what the expected term would be.

50

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Forfeiture rate

The amount of stock-based compensation recognized during a period is based on the value of the portion of

the awards that are ultimately expected to vest. Forfeitures are estimated at the time of grant and revised, if
necessary, in subsequent periods if actual forfeitures differ from those estimates. The term “forfeitures” is distinct
from “cancellations” or “expirations” and represents only the unvested portion of the surrendered option.

Vicor — The Company currently expects that for Vicor options, based on an analysis of its historical

forfeitures, that approximately 71% of its options will actually vest, and therefore has applied an annual
forfeiture rate of 11.25% to all unvested options as of December 31, 2010. For 2009, the Company expected
75% of its options would actually vest and applied an annual forfeiture rate of 9.5%. This analysis is re-
evaluated quarterly and the forfeiture rate is adjusted as necessary. Ultimately, the actual expense recognized
over the vesting period will only be for those shares that vest.

Picor — The Company currently expects that for Picor options, based on an analysis of its historical

forfeitures, that approximately 94% of its options will actually vest, and therefore has applied an annual
forfeiture rate of 2.0% to all unvested options as of December 31, 2010 and 2009. This analysis will be re-
evaluated quarterly and the forfeiture rate will be adjusted as necessary. Ultimately, the actual expense
recognized over the vesting period will only be for those shares that vest.

V*I Chip — The Company currently expects that for V*I Chip options, based on an analysis of its
historical forfeitures, that approximately 83% of its options will actually vest, and therefore has applied an
annual forfeiture rate of 6.25% to all unvested options as of December 31, 2010 and 2009. This analysis will
be re-evaluated quarterly and the forfeiture rate will be adjusted as necessary. Ultimately, the actual expense
recognized over the vesting period will only be for those shares that vest.

Vicor Stock Options

A summary of the activity under the Company’s stock option plans as of December 31, 2010 and changes

during the year then ended, is presented below (in thousands except for share and weighted-average data):

Outstanding on December 31, 2009 . . . . . . . . . . . . . . . . . .
Granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Forfeited and expired . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exercised . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Options
Outstanding

765,563
1,336,242
(198,989)
(104,489)

Outstanding on December 31, 2010 . . . . . . . . . . . . . . . . . .

1,798,327

Exercisable on December 31, 2010 . . . . . . . . . . . . . . . . . .

359,264

Vested or expected to vest as of December 31, 2010(1) . . .

884,670

Weighted-
Average
Exercise
Price

Weighted-
Average
Remaining
Contractual
Life in Years

Aggregate
Intrinsic
Value

17.11
13.66
25.93
10.55

13.95

15.89

14.25

7.76

2.10

5.98

$5,204

$ 939

$2,678

(1) In addition to the vested options, the Company expects a portion of the unvested options to vest at some
point in the future. Options expected to vest is calculated by applying an estimated forfeiture rate to the
unvested options.

As of December 31, 2009 and 2008, the Company had shares exercisable of 575,482 and 883,696

respectively, for which the weighted average exercise prices were $19.12 and $17.57, respectively.

51

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

During the years ended December 31, 2010, 2009, and 2008 under all plans, the total intrinsic value of

Vicor options exercised (i.e. the difference between the market price at exercise and the price paid by the
employee to exercise the options) was $723,000, $1,000 and $109,000, respectively. The total amount of cash
received by the Company from options exercised in 2010 was $1,104,000. The total grant-date fair value of
stock options that vested during the years ended December 31, 2010, 2009 and 2008 was approximately
$422,000, $432,000, and $462,000, respectively.

As of December 31, 2010, there was $275,000 of total unrecognized compensation cost related to
unvested non-performance share-based awards for Vicor. That cost is expected to be recognized over a
weighted-average period of 8.56 years for all Vicor awards. The expense will be recognized as follows:
$180,000 in 2011, $61,000 in 2012, $23,000 in 2013, $9,000 in 2014, and 2,000 in 2015. In addition, as of
December 31, 2010, there was $7,790,000 of unrecognized compensation cost related to performance-based
options, for which expensing has not commenced.

The weighted-average fair value of Vicor options granted was $4.78, $2.69 and $3.32 in 2010, 2009 and

2008, respectively. The weighted-average contractual life for Vicor options outstanding as of December 31,
2010 is 7.8 years.

Picor Stock Options

Under the 2001 Picor Plan, the Board of Directors of Picor may grant stock incentive awards based on

the Picor Common Stock, including stock options, restricted stock or unrestricted stock. Awards may be
granted to employees and other key persons, including non-employee directors and full or part-time officers.
Incentive stock options may be granted to employees at a price at least equal to the fair market value per share
of the Picor Common Stock, based on judgments made by the Company, on the date of grant. A total of
80,000,000 shares of Picor Common Stock have been reserved for issuance under the 2001 Picor Plan. The
period of time during which an option may be exercised and the vesting periods are determined by the Picor
Board of Directors. The term of each option may not exceed ten years from the date of grant.

A summary of the activity under the 2001 Picor Plan as of December 31, 2010 and changes during the

year then ended, is presented below (in thousands except for share and weighted-average data):

Outstanding on December 31, 2009 . . . . . . . . . . . . . . . . .
Granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Forfeited and expired . . . . . . . . . . . . . . . . . . . . . . . . . .
Exercised . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Options
Outstanding

5,021,040
5,412,123
(431,400)
—

Outstanding on December 31, 2010 . . . . . . . . . . . . . . . . . 10,001,763

Exercisable on December 31, 2010 . . . . . . . . . . . . . . . . . .

4,213,640

Vested or expected to vest as of December 31, 2010(1) . . .

9,700,333

Weighted-
Average
Exercise
Price

Weighted-
Average
Remaining
Contractual
Life in Years

Aggregate
Intrinsic
Value

0.62
0.57
0.74
—

0.59

0.56

0.59

6.80

3.04

6.72

$610

$610

$610

(1) In addition to the vested options, the Company expects a portion of the unvested options to vest at some
point in the future. Options expected to vest is calculated by applying an estimated forfeiture rate to the
unvested options.

As of December 31, 2009 and 2008, Picor had shares exercisable of 3,977,940 and 3,526,220,

respectively, for which the weighted average exercise prices were $0.54 and $0.49, respectively.

52

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

For years ended December 31, 2010, 2009, and 2008, Picor did not have any options exercised. The total

grant-date fair value of stock options that vested during the years ended December 31, 2010, 2009 and 2008
was approximately $68,000, $189,000, and $276,000, respectively.

As of December 31, 2010, there was $1,571,000 of total unrecognized compensation cost related to
unvested share-based awards for Picor. That cost is expected to be recognized over a weighted-average period
of 4.09 years for all Picor awards. The expense will be recognized as follows: $475,000 in 2011, $342,000 in
2012, $300,000 in 2013, $259,000 in 2014, and $195,000 in 2015.

The weighted-average fair value of Picor options granted was $0.60 in 2008. The weighted-average

contractual life for Picor options outstanding as of December 31, 2010 is 6.8 years.

V*I Chip Stock Options

Under the 2007 V*I Chip Plan, the Board of Directors of V*I Chip may grant stock incentive awards
based on the V*I Chip Common Stock, including stock options, restricted stock or unrestricted stock. Awards
may be granted to employees and other key persons, including non-employee directors and full or part-time
officers. Incentive stock options may be granted to employees at a price at least equal to the fair market value
per share of the V*I Chip Common Stock, based on judgments made by the Company, on the date of grant. A
total of 100,000,000 shares of V*I Chip Common Stock have been reserved for issuance under the 2007 V*I
Chip Plan. The period of time during which an option may be exercised and the vesting periods are determined
by the V*I Chip Board of Directors. The term of each option may not exceed ten years from the date of grant.

A summary of the activity under the 2007 V*I Chip Plan as of December 31, 2010 and changes during

the year then ended, is presented below (in thousands except for share and weighted-average data):

Outstanding on December 31, 2009 . . . . . . . . . . . . . . . . .
Granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Forfeited and expired . . . . . . . . . . . . . . . . . . . . . . . . . .
Exercised . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Options
Outstanding

7,617,500
3,322,750
(150,000)
—

Outstanding on December 31, 2010 (2) . . . . . . . . . . . . . . . 10,790,250

Exercisable on December 31, 2010 . . . . . . . . . . . . . . . . . .

4,436,200

Vested or expected to vest as of December 31, 2010(1) . . . 10,202,748

Weighted-
Average
Exercise
Price

Weighted-
Average
Remaining
Contractual
Life in Years

Aggregate
Intrinsic
Value

1.00
1.00
1.00
—

1.00

1.00

1.00

8.14

6.41

8.06

$—

$—

$—

(1) In addition to the vested options, the Company expects a portion of the unvested options to vest at some
point in the future. Options expected to vest is calculated by applying an estimated forfeiture rate to the
unvested options.

(2) Of the total V*I Chip options outstanding on December 31, 2010, 5,500,000 options have been granted to

the Company’s Chief Executive Officer.

As of December 31, 2009 and 2008, V*I Chip had shares exercisable of 2,987,200 and 1,516,600,

respectively, for which the weighted average exercise price was $1.00. For the years ended December 31,
2010, 2009 and 2008, V*I Chip did not have any options exercised.

As of December 31, 2010, there was $1,944,000 of total unrecognized compensation cost related to

unvested share-based awards for V*I Chip. That cost is expected to be recognized over a weighted-average

53

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

period of 3.48 years for all V*I Chip awards. The expense will be recognized as follows: $508,000 in 2011,
$426,000 in 2012, $350,000 in 2013, $330,000 in 2014 and $330,000 in 2015.

The weighted-average fair value of V*I Chip options granted was $0.43 in 2008. The weighted-average

contractual life for V*I Chip options outstanding as of December 31, 2010 is 8.1 years.

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 matches employee contributions to the plan at a
rate of 50% up to the first 3% of an employee’s compensation. The Company’s matching contributions
currently vest at a rate of 20% per year based upon years of service. The Company’s contribution to the plan
was approximately $760,000, $697,000 and $759,000 in 2010, 2009 and 2008, respectively.

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. On December 31, 2010, 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 the present time.

4. SHORT-TERM AND LONG-TERM INVESTMENTS

As of December 31, 2010, the Company held par value of $19,075,000 of auction rate securities. These

auction rate securities consist of collateralized debt obligations, supported by pools of student loans, sponsored
by state student loan agencies and corporate student loan servicing firms. The interest rates for these securities
are reset at auction at regular intervals ranging from seven to 90 days. The auction rate securities held by the
Company traded at par prior to February 2008 and are callable at par at the option of the issuer.

Until February 2008, the auction rate securities market was liquid, as the investment banks conducting the

periodic “Dutch auctions” by which interest rates for the securities had been established had committed their
capital to support such auctions in the event of insufficient third-party investor demand. Starting the week of
February 11, 2008, a substantial number of auctions failed, as demand from third-party investors weakened
and the investment banks conducting the auctions chose not to commit capital to support such auctions (i.e.,
investment banks chose not to purchase securities themselves in order to balance supply and demand, thereby
facilitating a successful auction, as they had done in the past). The consequences of a failed auction are (a) an
investor must hold the specific security until the next scheduled auction (unless that investor chooses to sell
the security to a third party outside of the auction process) and (b) the interest rate on the security generally
resets to an interest rate set forth in each security’s indenture.

As of December 31, 2010, the Company held auction rate securities that had experienced failed auctions

totaling $19,075,000 at par value, all of which had been purchased through and are held by a broker-dealer
affiliate of Bank of America, N.A. (the “Failed Auction Securities”). As of December 31, 2010, the majority
of the Failed Auction Securities held by the Company were AAA/Aaa rated by the major credit rating
agencies, with all of the securities collateralized by student loans, of which most are guaranteed by the
U.S. Department of Education under the Federal Family Education Loan Program. Management is not aware
of any reason to believe any of the issuers of the Failed Auction Securities held by the Company are presently
at risk of default. Through December 31, 2010, the Company has continued to receive interest payments on
the Failed Auction Securities in accordance with the terms of their respective indentures. Management believes
the Company ultimately should be able to liquidate all of its Failed Auction Securities without significant loss
primarily due to the overall quality of the issues held and the collateral securing the substantial majority of the

54

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

underlying obligations. However, current conditions in the auction rate securities market have led management
to conclude the recovery period for the Failed Auction Securities exceeds 12 months. As a result, the Company
continued to classify the Failed Auction Securities as long-term as of December 31, 2010.

The following is a summary of available-for-sale securities (in thousands):

December 31, 2010
Failed Auction Securities . . . . . . . . . . . . . . . . . . . . . $19,075
448
Certificates of deposit . . . . . . . . . . . . . . . . . . . . . . .
1,720
Brokered certificates of deposit . . . . . . . . . . . . . . . .

Cost

$21,243

December 31, 2009
Failed Auction Securities . . . . . . . . . . . . . . . . . . . . . $19,700
434
Certificates of deposit . . . . . . . . . . . . . . . . . . . . . . .
2,070
Brokered certificates of deposit . . . . . . . . . . . . . . . .

Cost

$22,204

Gross
Unrealized
Gains

Gross
Unrealized
Losses

$2,856

$18,417

Gross
Unrealized
Gains

Gross
Unrealized
Losses

Estimated
Fair
Value

$16,219
448
1,750

Estimated
Fair
Value

$17,110
434
2,104

$2,856
—
—

$2,590
—
—

$2,590

$19,648

$—
—
30

$30

$—
—
34

$34

All of the Failed Auction Securities as of December 31, 2010 and 2009, respectively have been in an

unrealized loss position for greater than 12 months.

The amortized cost and estimated fair value of available-for-sale securities on December 31, 2010, by

contractual maturities, are shown below (in thousands):

Due in one year or less . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 1,078
1,090
Due in two to ten years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
—
Due in ten to twenty years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19,075
Due in twenty to forty years. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cost

Estimated
Fair Value

$ 1,089
1,109
—
16,219

$21,243

$18,417

Trading Securities

The following is a summary of trading securities (in thousands):

December 31, 2010
Failed Auction Securities . . . . . . . . . . . . . . . . . . . . . $ —

Cost

Gross
Unrealized
Gains

Gross
Unrealized
Losses

Estimated
Fair
Value

$—

$ —

$ —

December 31, 2009
Failed Auction Securities . . . . . . . . . . . . . . . . . . . . . $13,900

$—

$970

$12,930

As of December 31, 2009, the Company held auction rate securities that had experienced failed auctions

totaling $13,900,000 at par value, that were classified as trading securities, all of which had been purchased
through and were held by a broker-dealer affiliate of UBS AG (“UBS”). Pursuant to a settlement agreement

55

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

reached with UBS, the Company’s then remaining par value of $8,600,000 of auction rate securities held by
UBS were purchased by UBS at par value on June 30, 2010.

Based on the fair value measurements described in Note 5, the fair value of the Failed Auction Securities
on December 31, 2010, with a par value of $19,075,000, was estimated by the Company to be approximately
$16,219,000, a decrease in fair value of $266,000, net of $625,000 of redemptions from December 31, 2009.
The gross unrealized loss of $2,856,000 on the Failed Auction Securities consists of two types of estimated
loss: an aggregate credit loss of $610,000 and an aggregate temporary impairment of $2,246,000. For the year
ended December 31, 2010, the aggregate credit loss on the Failed Auction Securities increased by a net
amount of $146,000, which was recorded in “Net impairment (losses) gains recognized in earnings” in the
Consolidated Statement of Operations. In determining the amount of credit loss, the Company compared the
present value of cash flows expected to be collected to the amortized cost basis of the securities, considering
credit default risk probabilities and changes in credit ratings as significant inputs, among other factors (See
Note 5).

The following table represents a rollforward of the activity related to the credit loss recognized in
earnings on available-for-sale ARS securities held by the Company for the year ended December 31, 2010 (in
thousands):

Balance at the beginning of the period. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $464
Reductions for securities sold during the period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(18)
Additions for the amount related to credit loss for which other-than-temporary impairment

was not previously recognized . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

164

Balance at the end of the period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $610

At this time, the Company has no intent to sell any of the impaired Failed Auction Securities and does
not believe it is more likely than not the Company will be required to sell any of these securities. Management
expects the securities to regain liquidity as the financial markets recover from the current economic downturn.
If current market conditions deteriorate further, the Company may be required to record additional unrealized
losses. If the credit rating of the security deteriorates, or the anticipated recovery in the market values does not
occur, the Company may be required to adjust the carrying value of these investments through impairment
charges recorded in the Consolidated Statement of Operations, and any such impairment adjustments may be
material.

Based on the Company’s ability to access cash and other short-term investments and its expected
operating cash flows, management does not anticipate the current lack of liquidity associated with the Failed
Auction Securities held will affect the Company’s ability to execute its current operating plan.

56

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

5. FAIR VALUE MEASUREMENTS

Assets measured at fair value on a recurring basis include the following as of December 31, 2010 (in

thousands):

Quoted Prices
in Active
Markets
(Level 1)

Using
Significant
Other
Observable
Inputs
(Level 2)

Significant
Unobservable
Inputs
(Level 3)

Total Fair
Value as of
December 31,
2010

Cash Equivalents:

Money market funds. . . . . . . . . . . . . . . . . . . . . . .

$16,629

$ —

$ —

$16,629

Long term investments:

Auction rate securities . . . . . . . . . . . . . . . . . . . . .
Certificates of deposit
. . . . . . . . . . . . . . . . . . . . .
Brokered certificates of deposit. . . . . . . . . . . . . . .

—
448
—

—
—
1,750

16,219
—
—

16,219
448
1,750

As of December 31, 2010, there was insufficient observable auction rate security market information
available to determine the fair value of the Failed Auction Securities using Level 1 or Level 2 inputs. As such,
the Company’s investments in Failed Auction Securities were deemed to require valuation using Level 3 inputs.
Management, after consulting with advisors, valued the Failed Auction Securities using analyses and pricing
models similar to those used by market participants (i.e., buyers, sellers, and the broker-dealers responsible for
execution of the Dutch auction pricing mechanism by which each issue’s interest rate was set). Management
utilized a probability weighted discounted cash flow (“DCF”) model to determine the estimated fair value of
these securities as of December 31, 2010. The major assumptions used in preparing the DCF model included
estimates for the amount and timing of future interest and principal payments based on default probability
assumptions used to measure the credit loss of approximately 2% for AAA rated securities, the rate of return
required by investors to own these securities in the current environment, which we estimate to be 5% above
the risk free rate of return, and the estimated timeframe for successful auctions for these securities to occur
being three to five years. In making these assumptions, management considered relevant factors including: the
formula applicable to each security defining the interest rate paid to investors in the event of a failed auction;
forward projections of the interest rate benchmarks specified in such formulas; the likely timing of principal
repayments; the probability of full repayment considering the guarantees by the U.S. Department of Education
of the underlying student loans, guarantees by other third parties, and additional credit enhancements provided
through other means; and publicly available pricing data for recently issued student loan asset-backed
securities not subject to auctions. The estimate of the rate of return required by investors to own these
securities also considered the currently reduced liquidity for auction rate securities. An increase or decrease in
the liquidity risk premium (i.e., the discount rate) of 100 basis points as used in the model would decrease or
increase, respectively, the fair value of the Failed Auction Securities by approximately $900,000.

The following table summarizes the change in the fair values for those assets valued on a recurring basis

utilizing Level 3 inputs for the year ended December 31, 2010 (in thousands):

Balance at the beginning of the period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Redemptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unrealized loss on trading securities included in Other income, net . . . . . . . . . . . . . . . . .
Credit losses on available for sales securities included in Other income, net . . . . . . . . . . .
Unrealized gain included in Other comprehensive (loss) income . . . . . . . . . . . . . . . . . . . .

$ 28,852
(12,375)
8
(146)
(120)

Balance at the end of the period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 16,219

57

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

6. INVENTORIES

Inventories as of December 31 were as follows (in thousands):

Raw materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Work-in-process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Finished goods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$31,750
4,182
5,001

$18,675
3,434
5,191

Inventory reserves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

40,933
(5,444)

27,300
(5,943)

Net balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$35,489

$21,357

2010

2009

7. PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment are stated at cost and are depreciated and amortized over a period of three
to 32 years generally under the straight-line method for financial reporting purposes and accelerated methods
for income tax purposes.

Property, plant and equipment as of December 31 were as follows (in thousands):

2010

2009

Land . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Buildings and improvements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Machinery and equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Furniture and fixtures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Construction in-progress and deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

2,089
41,791
203,744
5,847
4,499

$

2,089
41,569
192,805
5,808
5,810

Accumulated depreciation and amortization . . . . . . . . . . . . . . . . . . . . . . . .

257,970
(207,122)

248,081
(199,072)

Net balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 50,848

$ 49,009

Depreciation expense for the years ended December 31, 2010, 2009 and 2008 was approximately
$9,778,000, $9,882,000, and $10,266,000 respectively. As of December 31, 2010, the Company had approxi-
mately $2,080,000 of capital expenditure commitments.

8. OTHER INVESTMENTS

The Company’s gross investment in non-voting convertible preferred stock of GWS totaled $5,000,000 as
of December 31, 2010, and December 31, 2009, giving the Company an approximately 30% ownership interest
in GWS. GWS and its subsidiary design and sell semiconductors, conduct research and development activities,
develop and license patents, and litigate against those who infringe upon patented technology. A director of the
Company is the founder, Chairman of the Board, President and Chief Executive Officer (“CEO”), as well as
the majority voting shareholder, of GWS. The Company and GWS are parties to an intellectual property cross-
licensing agreement, a license agreement and two supply agreements under which the Company purchases
certain components from GWS. Purchases from GWS totaled approximately $5,362,000, $1,608,000 and
$1,702,000 in 2010, 2009, and 2008, respectively. The Company owed GWS approximately $555,000 and
$146,000 as of December 31, 2010 and 2009, respectively. During 2009, the Company made payments totaling
$650,000 under the license agreement.

The Company accounts for its investment in GWS under the equity method of accounting. The Company
has determined that, while GWS is a variable interest entity, the Company is not the primary beneficiary. The

58

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

key factors in the Company’s assessment were that the CEO of GWS has: (i) the power to direct the activities
of GWS that most significantly impact its economic performance, and (ii) has an obligation to absorb losses
or the right to receive benefits from GWS, respectively, that could potentially be significant to GWS.

Loss from equity method investment, net of tax for the years ended December 31 consists of the

following (in thousands):

2010

2009

2008

Allocation of losses from equity method investment (net of tax) . . . . . . . . . .
Amortization of intangible assets and other (net of tax) . . . . . . . . . . . . . . . . —
Other than temporary decline in investment . . . . . . . . . . . . . . . . . . . . . . . . . —

$— $— $ 321
106
—
1,261
—

$— $— $1,688

There was no allocation of equity method income (loss) in 2010 and 2009 as GWS incurred a net loss for

those years. Due to an adjustment to the investment for a decline in value judged to be other than temporary
during the fourth quarter of 2008, the amounts included in “Other assets” in the accompanying Consolidated
Balance Sheets related to the net GWS investment were zero as of December 31, 2010 and 2009.

9. GOODWILL AND OTHER INTANGIBLE ASSETS

The Company tests goodwill and other indefinite lived intangible assets for impairment at least annually
at the reporting unit level. Definite lived intangible assets, such as patent rights, are amortized and tested for
impairment at least annually at the reporting unit level. The Company reassessed the carrying value of its
goodwill of approximately $2,000,000 related to the operations of one of its subsidiaries, VJCL, during the
fourth quarter of fiscal 2010 and determined that there was no impairment to the carrying value.

Patent costs, which are included in other assets in the accompanying balance sheets, as of December 31

were as follows (in thousands):

2010

2009

Patent costs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 3,459
(1,827)
Accumulated amortization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 3,456
(1,683)

$ 1,632

$ 1,773

In 2010 and 2009, the Company wrote off patent costs associated with abandoned patents with net book

values of approximately $19,000 and $82,000, respectively, which was charged to amortization expense. Patent
renewal fees were $55,000 and $62,000 in 2010 and 2009, respectively.

Amortization expense was approximately $318,000, $254,000 and $249,000 in 2010, 2009 and 2008,

respectively. The estimated future amortization expense from patent assets held as of December 31, 2010, is
projected to be $200,000, $187,000, $180,000, $166,000, and $138,000, in fiscal years 2011, 2012, 2013,
2014, and 2015, respectively.

During the second quarter of 2009, the Company entered into a license agreement with GWS in which

the Company paid $500,000 to obtain certain rights to several GWS semiconductor devices (See Note 8). The

59

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

amount is being amortized on a straight-line basis over four years, and is included in “Other assets” in the
accompanying Consolidated Balance Sheets. Balances as of December 31 were as follows (in thousands):

GWS intangibles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accumulated amortization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 500
(187)

$500
(62)

2010

2009

$ 313

$438

The estimated future amortization expense from GWS intangible assets held as of December 31, 2010, is

projected to be $125,000, $125,000, and $63,000 in fiscal years 2011, 2012, and 2013, respectively.

10. SEVERANCE CHARGES

During 2009, the Company initiated workforce reductions and recorded pre-tax charges for the cost of

severance and other employee-related costs involving cash payments during 2009 and 2010 based on each
employee’s respective length of service. Total severance charges of $4,099,000 were recorded as “Severance
charges” in the Consolidated Statement of Operations. The related liability is presented as “Accrued severance
charges” in the Consolidated Balance Sheets.

A summary of the activity related to the severance charges, by segment, is as follows (in thousands):

Balance as of December 31, 2009 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 255
(255)
Payments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Balance as of December 31, 2010 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ —

$ 4
(4)

$—

$ 259
(259)

$ —

BBU

V*I Chip

Total

11. PRODUCT WARRANTIES

Product warranty activity for the years ended December 31 was as follows (in thousands):

Balance at the beginning of the period . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accruals for warranties for products sold in the period . . . . . . . . . . . . . . .
Fulfillment of warranty obligations . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Revisions of estimated obligations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 772
573
(548)
(148)

$ 896
205
(101)
(228)

$ 679
595
(385)
7

Balance at the end of the period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 649

$ 772

$ 896

2010

2009

2008

12. STOCKHOLDERS’ EQUITY

In November 2000, the Board of Directors of the Company authorized the repurchase of up to

$30,000,000 of the Company’s Common Stock (the “November 2000 Plan”). The plan authorizes the Company
to make 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. There were no repurchases under
the November 2000 Plan in 2009, 2008 or 2007. On December 31, 2010 and 2009, the Company had
approximately $8,541,000 available for use under the November 2000 Plan.

60

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Common Stock

Each share of Common Stock entitles the holder thereof to one vote on all matters submitted to the

stockholders.

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 a stockholder except to or among the
stockholder’s spouse, certain of the 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 stockholder into shares of
Common Stock on a one-for-one basis.

Dividends are declared at the discretion of the Company’s Board of Directors and depend on actual cash

from operations, the Company’s financial condition and capital requirements and any other factors the
Company’s Board of Directors may consider relevant.

On March 14, 2008, the Company’s Board of Directors approved a cash dividend of $0.15 per share of

the Company’s stock. The total dividend of approximately $6,245,000 was paid on April 18, 2008 to
shareholders of record at the close of business on April 2, 2008.

On August 7, 2008, the Company’s Board of Directors approved a cash dividend of $0.15 per share of the

Company’s stock. The total dividend of approximately $6,249,000 was paid on September 10, 2008 to
shareholders of record at the close of business on August 25, 2008.

On June 28, 2010, the Company’s Board of Directors approved a cash dividend of $0.30 per share of the
Company’s stock. The total dividend of approximately $12,506,000 was paid on July 30, 2010 to shareholders
of record at the close of business on July 16, 2010.

During the year ending December 31, 2008, a subsidiary paid a total of $2,290,000 in cash dividends on

subsidiary common stock, of which $1,122,000 was paid to the Company and $1,168,000 was paid to an
outside shareholder. During the year ending December 31, 2009, two subsidiaries paid a total of $4,690,000 in
cash dividends on subsidiary common stock, of which $3,421,000 was paid to the Company and $1,269,000
was paid to outside shareholders. During the year ending December 31, 2010, three subsidiaries paid a total of
$5,457,000 in cash dividends, of which $4,905,000 was paid to the Company and $552,000 was paid to outside
shareholders. Dividends paid to outside shareholders are accounted for as a reduction in noncontrolling
interest.

During 2010, a total of 104,489 shares of Common Stock were issued upon the exercise of stock options.

There were no shares of Class B Common Stock converted into Common Stock during 2010.

On December 31, 2010, there were 14,957,861 shares of Vicor Common Stock reserved for issuance

under Vicor stock options and upon conversion of Class B Common Stock.

61

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

13. OTHER INCOME, NET

The major changes in the components of the other income, net for the years ended December 31 were as

follows (in thousands):

2010

2009

2008

Interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 438
Unrealized gain (loss) on trading securities . . . . . . . . . . . . . . . . . . . . .
970
(962)
Unrealized (loss) gain on auction rate securities rights . . . . . . . . . . . . .
(146)
Credit losses on available for sale securities . . . . . . . . . . . . . . . . . . . . .
(158)
Foreign currency (losses) gains, net . . . . . . . . . . . . . . . . . . . . . . . . . . .
248
Gain on disposal of equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
107
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 717
1,268
(964)
(464)
35
30
60

$ 2,138
(2,238)
1,926
—
82
19
101

$ 497

$ 682

$ 2,028

62

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

14. 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 assets and liabilities as of December 31 were as follows
(in thousands):

2010

2009

Deferred tax assets

Research and development tax credit carryforwards . . . . . . . . . . . . . . . . . . $ 7,772
1,905
Inventory reserves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1,500
Vacation accrual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1,249
Investment tax credit carryforwards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1,224
Stock-based compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1,075
Net operating loss carryforwards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1,045
Alternative minimum tax credit carryforward . . . . . . . . . . . . . . . . . . . . . . .
1,023
Unrealized loss on investments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
700
Capital loss carryforward . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
395
Deferred revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
189
Warranty reserves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
103
Bad debt reserves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
588
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 9,122
2,229
1,228
978
974
8,130
590
993
700
407
253
87
138

Total deferred tax assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Less: Valuation allowance for deferred tax assets . . . . . . . . . . . . . . . . . .

18,768
(10,259)

25,829
(24,803)

Net deferred tax assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8,509

1,026

Deferred tax liabilities

Depreciation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Patent amortization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Goodwill . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unremitted Vicor Custom earnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total deferred tax liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(1,564)
(594)
(549)
(320)
(513)

(3,540)

(380)
(646)
(478)
(314)
(303)

(2,121)

Net deferred tax assets (liabilities) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 4,969

$ (1,095)

Prior to September 30, 2010, the Company maintained a valuation allowance against a significant portion

of its deferred tax assets, consisting of net operating loss carryforwards, tax credit carryforwards and
deductible temporary differences. Based on the Company’s pre-tax income for the nine months ended
September 30, 2010 being sufficient to fully utilize its net operating loss carryforwards, a history of
cumulative earnings before taxes for financial reporting purposes over a 12-quarter period, and expected future
taxable income, management determined it was more likely than not a significant portion of the deferred tax
assets would be realized. As a result, at September 30, 2010, the Company determined that it was appropriate
to reverse a portion of its valuation allowance by $5,158,000 as a discrete benefit for income taxes for certain
deductible temporary differences expected to be realized in future periods. An additional benefit of $1,159,000
was recorded in the fourth quarter of 2010. Management could not make such a determination in the prior
quarters of fiscal 2010 due to a lack of confidence in being able to accurately forecast the expected ordinary
income (loss) for the year largely due to global economic conditions and the possible impact continued

63

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

economic and business uncertainty would have on the Company’s business at those times. This tax benefit was
partially offset by estimated federal, state and foreign income taxes on the Company’s 2010 pre-tax income
and estimated federal and state income taxes for certain noncontrolling interests that are not part of the
Company’s consolidated income tax returns. The 2010 tax provision also includes discrete items, principally
related to tax credits and expense for net increases in state taxes and accrued interest for potential liabilities.

The tax provisions in 2009 and 2008 provided for estimated income taxes due in various state and

international taxing jurisdictions for which losses incurred by the Company cannot be offset, and for estimated
federal and state income taxes for certain noncontrolling interests that are not part of the Company’s
consolidated income tax returns, offset by the expected utilization of federal and foreign net operating loss
carryforwards and the reduction in tax reserves in 2008 discussed below. The 2009 tax provision also includes
discrete items, including benefits for the receipt of refunds for net operating loss carryback claims and for an
expected refund due to certain monetized credits, and expense for increases in state taxes and accrued interest
for potential liabilities. The 2008 tax provision also included discrete items principally for increases in accrued
interest for potential liabilities and expense associated with a reduction in state income tax refunds receivable.
During 2008, the Company reduced its tax reserves by $1,123,000 due to closing tax periods in certain
jurisdictions.

As of December 31, 2010, the Company has a remaining valuation allowance of approximately

$10,259,000 against certain deferred tax assets, for which realization cannot be considered more likely than
not at this time. Such deferred tax assets principally relates to tax credit carryforwards in certain state tax
jurisdictions for which sufficient taxable income for utilization cannot be projected at this time or the credits
may expire without being utilized. Management assesses the need for the valuation allowance on a quarterly
basis. If and when management determines the valuation allowance should be released, the adjustment would
result in a tax benefit in the Consolidated Statements of Operations and may include a portion to be accounted
for through “Additional paid-in capital”, a component of Stockholders’ Equity. The amount of the tax benefit
to be recorded in a particular quarter could be material.

For financial reporting purposes, income before income taxes for the years ended December 31 include

the following components (in thousands):

Domestic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $28,973
646
Foreign . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$5,236
219

$29,619

$5,455

2010

2009

2008

$654
232

$886

Significant components of the provision (benefit) for income taxes for the years ended December 31 are

as follows (in thousands):

Current:

2010

2009

2008

Federal
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Foreign . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 1,187
958
209

$ 939
422
75

$1,355
(533)
27

Deferred:
Federal

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(6,274)

(74)

2,354

1,436

849

127

$(3,920)

$1,362

$ 976

The Company continues to intend to reinvest certain of its foreign earnings indefinitely. Accordingly, no

U.S. income taxes have been provided for approximately $2,570,000 of unremitted earnings of international

64

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

subsidiaries. As of December 31, 2010, the amount of unrecognized deferred tax liability on these earnings
was $195,000.

The reconciliation of the federal statutory rate to the effective income tax rate for the years ended

December 31 is as follows:

Statutory federal tax rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
State income taxes, net of federal income tax benefit . . . . . . . . . . . . . . . . .
Increase (reduction) in tax reserves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Permanent items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Foreign rate differential and deferred items . . . . . . . . . . . . . . . . . . . . . . . .
Tax credits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Book income attributable to noncontrolling interest . . . . . . . . . . . . . . . . . .
(Decrease) increase in valuation allowance . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2010

2009

2008

34.0% 35.0% 35.0%
2.7
9.2
(2.1)
2.3
0.2
4.0
(0.9)
(1.0)
—
2.3
(8.3)
(0.3)
(14.2)
(49.7)
—
(1.4)

37.0
(104.3)
31.8
(5.4)
(30.9)
(71.8)
218.8
—

(13.2)% 25.0% 110.2%

As a result of the difference in treatment of excess stock option deductions available for income tax
return and financial statement reporting purposes, the Company has approximately $1,949,000 of federal
research and development tax credit and $760,000 of federal alternative minimum tax credit carryforwards that
may be offset against future taxable income, which are included in the components of deferred tax assets
disclosed above. It is anticipated that when these tax attributes are realized on an income tax return in the
future, the related benefit will be recorded against “Additional paid-in capital”. The research and development
tax credit carryforwards expire beginning in 2015 for state purposes and in 2028 for federal purposes. The
Company has net operating loss carryforwards in certain states, which expire beginning in 2010.

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in

thousands):

Balance on January 1, 2010 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Additions based on tax provisions related to the current year . . . . . . . . . . . . . . . . . . . . . .
Reductions based on tax provisions related to prior years . . . . . . . . . . . . . . . . . . . . . . . . .

$ 712
746
(356)

Balance on December 31, 2010 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$1,102

The Company has reviewed the tax positions taken, or to be taken, in its tax returns for all tax years
currently open to examination by a taxing authority. The total amount of unrecognized tax benefits, that is the
aggregate tax effect of differences between tax return positions and the benefits recognized in the Company’s
financial statements, on December 31, 2010 of $1,102,000 including accrued interest, if recognized, may
decrease the Company’s income tax provision and effective tax rate. None of the unrecognized tax benefits as
of December 31, 2010 are expected to significantly change during the next twelve months. The Company
recognizes accrued interest and penalties, if any, related to unrecognized tax benefits as a component of
income tax expense. As of December 31, 2010, the Company has accrued approximately $77,000 for the
potential payment of interest and recorded approximately $33,000 of income tax expense for interest, net of
related tax benefits, for the year ended December 31, 2010.

The Company files income tax returns in the United States and various foreign tax jurisdictions. These
tax returns are generally open to examination by the relevant tax authorities from three to seven years from the
date they are filed. The tax filings relating to the Company’s federal and state taxes are currently open to
examination for tax years 2007 through 2009 and 2000 through 2009, respectively. In addition, the 2003 and
2004 tax years resulted in losses. These years may be subject to examination when the losses are carried

65

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

forward and utilized in the future. In January 2010, the Company received notices from the Commonwealth of
Massachusetts and the State of New York that its Massachusetts corporate excise tax returns and New York
corporate tax returns, respectively, for tax years 2006 and 2007 had been selected for audit. In April 2010,
Vicor Japan Company, Ltd. received notice from the Regional Taxation Bureau that its corporate tax and tax
returns, respectively, for tax years from 2007 to 2009 have been selected for audit. The audits with the State of
New York and the Regional Taxation Bureau of Japan were both settled in the second quarter for immaterial
amounts. While the Massachusetts audit was still in process as of December 31, 2010, there are no other
income tax audits currently in process.

15. COMMITMENTS AND CONTINGENCIES

The Company leases certain of its office, warehousing and manufacturing space. The future minimum

rental commitments under non-cancelable operating leases with remaining terms in excess of one year are as
follows (in thousands):

Year

2011 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2012 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2013 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2014 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2015 and thereafter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$1,264
722
337
173
111

Rent expense was approximately $1,492,000, $1,496,000 and $1,445,000 in 2010, 2009 and 2008,

respectively. The Company also pays executory costs such as taxes, maintenance and insurance.

The Company also has a contract with a third-party to supply nitrogen for its manufacturing and research

and development activities. Under the contract, the Company is obligated to pay a minimum of $300,000
annually, subject to semi-annual price adjustments, through March 2015.

In addition to the amounts shown in the table above, approximately $958,000 of unrecognized tax benefits
has been recorded as liabilities as the settlement amounts are uncertain. The Company has recorded a liability
related to these unrecognized tax benefits for potential interest and penalties of approximately $77,000 on
December 31, 2010.

As disclosed in prior filings, we received total payments of $1,770,000 in the second quarter of 2007 in
full settlement of patent infringement litigation against Artesyn Technologies, Inc., Lucent Technologies Inc.,
and the Tyco Power Systems, a unit of Tyco International Ltd. (which had acquired the Power Systems
business of Lucent Technologies). The full amount of the payments, net of a $177,000 contingency fee we had
accrued for our litigation counsel, was included in the second quarter of 2007 in “(Gain) loss from litigation-
related and other settlements, net” in the Consolidated Statement of Operations. We were subsequently
informed by its litigation counsel that the full amount of the contingency fee was waived and, therefore, the
related accrual of $177,000 was reversed in the second quarter of 2008.

On February 22, 2007, the Company announced it had reached an agreement in principle with Ericsson,

Inc., the U.S. affiliate of LM Ericsson, to settle a lawsuit brought by Ericsson against the Company in
California state court. Under the terms of the settlement agreement entered into on March 29, 2007, after a
court ordered mediation, the Company paid $50,000,000 to Ericsson, of which $12,800,000 was reimbursed by

66

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

the Company’s insurance carriers. Accordingly, the Company recorded a net loss of $37,200,000 from the
litigation — related settlements in the fourth quarter of 2006. The Company has been seeking further
reimbursement from its insurance carriers. On November 14, 2008, a jury in the United States District Court
for the District of Massachusetts found in favor of the Company in a lawsuit against certain of its insurance
carriers with respect to the Ericsson settlement. The jury awarded $17,300,000 in damages to Vicor, although
the verdict is subject to challenge in the trial court and on appeal. Both parties filed certain motions
subsequent to the ruling and, on March 2, 2009, the judge in the case rendered his decision on the subsequent
motions, reducing the jury award by $4,000,000. On March 26, 2009, the U.S. District Court, District of
Massachusetts (“the Court”) issued its judgment in the matter, affirming the award of $13,300,000, plus
prejudgment interest from the date of breach on March 29, 2007, through March 26, 2009, the date of
judgment in the amount of approximately $3,179,000. The insurance carriers have filed their appeal to this
total judgment in the amount of approximately $16,479,000. No final and collectible judgment yet has been
entered by the Court.

The Company’s decision to enter into the settlement followed an adverse ruling by the court in January

2007 in connection with a settlement between Ericsson and co-defendants Exar Corporation (“Exar”) and
Rohm Device USA, LLC (“Rohm”), two of the Company’s component suppliers prior to 2002. The Company’s
writ of mandate appeal of this ruling was denied in April, 2007. In September 2007, The Company filed a
notice of appeal of the court’s decision upholding the Ericsson-Exar-Rohm settlement. In December 2007, the
court awarded Exar and Rohm amounts for certain statutory and discovery costs associated with this ruling. As
such, the Company accrued $240,000 in the second quarter of 2007, included in “(Gain) loss from litigation-
related and other settlements, net” in the Consolidated Statements of Operations, of which $78,000 of the
award was paid in the second quarter of 2008. On February 9, 2009, the Court of Appeals issued its opinion
affirming the judgment for Exar and Rohm in full. During the third quarter of 2009, the Company completed
negotiations with Exar and Rohm, resulting in separate settlement agreements calling for a final payment to
Exar of $70,000 and no additional payment due Rohm. As a result of the settlements, the Company reversed a
remaining excess accrual of approximately $96,000 in the third quarter of 2009, which is recorded in “Gain
from litigation-related and other settlements, net” in the accompanying Consolidated Statement of Operations.

During the third quarter of 2009, the Company entered into a release and settlement agreement with a
vendor over alleged product performance issues with certain products the vendor had sold to the Company.
The Company received a payment of $750,000 in consideration for the settlement, which is recorded in “Gain
from litigation-related and other settlements, net” in the accompanying Consolidated Statement of Operations.

On January 28, 2011, SynQor, Inc. (“SynQor”) filed a complaint for patent infringement against Ericsson,

Inc. (“Ericsson”), Cisco Systems, Inc. (“Cisco”) and Vicor in U.S. District Court for the Eastern District of
Texas. This immediately followed a complaint filed by the Company on January 26, 2011 in U.S. District
Court for the District of Massachusetts, in which the Company sought a declaratory judgment that its bus
converter products do not infringe any valid claim of certain of SynQor’s U.S. patents, and that the claims of
those patents are invalid. With respect to Vicor, SynQor’s complaint alleges that Vicor’s products, including,
but not limited to, unregulated bus converters used in intermediate bus architecture power supply systems,
infringe certain SynQor patents. SynQor seeks, amongst other items, an injunction against further infringement
and an award of unspecified compensatory and enhanced damages, interest, costs and attorney fees. On
February 8, 2011, SynQor filed a motion for preliminary injunction seeking an order enjoining Vicor from
manufacturing, using, selling, and offering for sale in the United States and/or importing into the United States
certain identified unregulated bus converters, as well as any other bus converters not significantly different
from those products. On February 17, 2011, the Company dismissed its Massachusetts action without prejudice
to allow the litigation to proceed in Texas. Vicor does not believe any of its products, including its unregulated
bus converters, infringe any valid claim of the SynQor patents, either alone or when used in an intermediate
bus architecture implementation. Vicor believes SynQor’s claims lack merit and therefore the Company plans
to vigorously defend itself against SynQor’s patent infringement allegations.

67

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

In addition, the Company is involved in certain other litigation and claims incidental to the conduct of its

business. While the outcome of lawsuits and claims against the Company cannot be predicted with certainty,
management does not expect any current litigation or claims to have a material adverse impact on the
Company’s financial position or results of operations.

16. SEGMENT INFORMATION

The Company has organized its business segments according to its key product lines. The Brick Business
Unit segment (“BBU”) designs, develops, manufactures and markets the Company’s modular power converters
and configurable products, and also includes the operations of the Company’s Westcor division, the six entities
comprising Vicor Custom Power, and the Brick operations of VJCL. The V*I Chip segment includes V*I Chip
Corporation that designs, develops, manufactures and markets the Company’s factorized power architecture
(“FPA”) products along with the V*I Chip business through VJCL. Picor designs, develops, manufactures and
markets Power Management Integrated Circuits and related products for use in a variety of power system
applications. Picor develops these products to be sold as part of Vicor’s products or to third parties for separate
applications.

The Company’s chief operating decision maker evaluates performance and allocates resources based on
segment revenues and segment operating income (loss). The operating income (loss) for each segment includes
selling, general and administrative and research and development expenses directly attributable to the segment.
Certain of the Company’s indirect overhead costs, which include corporate selling, general and administrative
expenses, are allocated among the segments based upon an estimate of costs associated with each segment.
Assets allocated to each segment are based upon specific identification of such assets, which include accounts
receivable, inventories, fixed assets and certain other assets. Corporate assets include cash, cash equivalents,
short-term investments, land and buildings associated with operations in Massachusetts, deferred tax assets,
and other assets. The Company’s accounting policies and method of presentation for segments are consistent
with that used throughout the Consolidated Financial Statements.

During the fourth quarter of 2010, the Company began to include the net revenues and cost of revenues

for shipments of V*I Chip products by VJCL in the V*I Chip segment, along with an allocation of certain
VJCL operating expenses from the BBU to the V*I Chip segment. Previously, all VJCL operating activity had
been included in the BBU segment. The 2009 segment information has been reclassified to conform to this
new presentation. The 2008 segment information was not reclassified as V*I Chip revenues included in VJCL
was not material in 2008.

68

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The following table provides significant segment financial data as of and for the years ended December 31

(in thousands):

2010:
Net revenues . . . . . . . . . .
Income (loss) from

operations . . . . . . . . . .
Total assets . . . . . . . . . . .
Depreciation and

amortization . . . . . . . . .

2009:
Net revenues . . . . . . . . . .
Income (loss) from

operations . . . . . . . . . .
Total assets . . . . . . . . . . .
Depreciation and

amortization . . . . . . . . .

2008:
Net revenues . . . . . . . . . .
Income (loss) from

operations . . . . . . . . . .
Total assets . . . . . . . . . . .
Depreciation and

amortization . . . . . . . . .

BBU

(1)

V*I Chip

Picor

Corporate

Eliminations

Total

(1)

(1)(2)

$217,018

$ 33,842

$11,061

$

— $ (11,188)

$250,733

55,619
78,014

(24,565)
31,278

(1,282)
7,463

(640)
103,486

(10)
(15,329)

29,122
204,912

4,788

3,500

470

1,464

—

10,222

$186,975

$ 14,599

$ 6,143

$

— $

(9,758)

$197,959

29,173
204,611

(22,642)
19,124

(4,265)
9,352

(716)
98,209

3,223
(150,719)

4,773
180,577

5,283

2,968

403

1,544

—

10,198

$189,362

$ 16,766

$ 5,096

$

— $

(5,856)

$205,368

26,317
177,331

(25,123)
14,850

(2,817)
9,011

(441)
87,072

922
(116,342)

(1,142)
171,922

5,920

2,645

384

1,566

—

10,515

(1) During the fourth quarter of 2010, the Company completed a recapitalization of V*I Chip. The impact of
the recapitalization on V*I Chip was to eliminate its intercompany payable to BBU of approximately
$172,100,000 and institute capital accounts totaling $50,000,000 as of December 31, 2010. The impact on
segment reporting was to reduce Total assets for BBU and increase Eliminations by $172,100,000 as of
December 31, 2010. There was no impact on the consolidated financial statements as a result of this
recapitalization.

(2) The elimination for net revenues is principally related to inter-segment revenues of Picor to BBU and V*I
Chip and for inter-segment revenues of V*I Chip to BBU. The elimination for total assets is principally
related to inter-segment receivables due to BBU for the funding of V*I Chip operations and for the pur-
chase of equipment for both V*I Chip and Picor.

During 2010, two customers accounted for approximately 12.3% and 11.5% of net revenues, respectively.

During 2009 and 2008, no customer accounted for more than 10% of net revenues. International sales, as a
percentage of total net revenues, were approximately 49% in 2010 and 41% in 2009 and 42% in 2008,
respectively. During 2010, net revenues from customers in Taiwan and Hong Kong, China accounted for
approximately 11.8% and 11.4%, respectively, of total net revenues.

69

VICOR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

17. QUARTERLY RESULTS OF OPERATIONS (Unaudited)

The following table sets forth certain unaudited quarterly financial data for the years ended December 31

(in thousands, except per share amounts):

2010:

Net revenues . . . . . . . . . . . . . . . . . . . . .
Gross margin . . . . . . . . . . . . . . . . . . . . .
Consolidated net income . . . . . . . . . . . .
Net income attributable to

noncontrolling interest . . . . . . . . . . . .

Net income attributable to Vicor

First

Second

Third

Fourth

Total

$51,709
23,324
2,005

$57,377
25,739
4,747

$68,672
32,473
15,869

$72,975
32,984
10,918

$250,733
114,520
33,539

53

—

50

111

214

Corporation . . . . . . . . . . . . . . . . . . . .

1,952

4,747

15,819

10,807

33,325

Net income per share attributable to

Vicor Corporation:
Basic and diluted . . . . . . . . . . . . . . . .

2009:

Net revenues . . . . . . . . . . . . . . . . . . . . .
Gross margin . . . . . . . . . . . . . . . . . . . . .
Consolidated net income (loss). . . . . . . .
Net income attributable to

noncontrolling interest . . . . . . . . . . . .

Net income (loss) attributable to Vicor

0.05

0.11

0.38

0.26

0.80

First

Second

Third

Fourth

Total

$50,448
21,831
(2,151)

$50,627
22,598
1,758

$47,746
20,668
1,990

$49,138
22,497
2,496

$197,959
87,594
4,093

392

417

299

187

1,295

Corporation . . . . . . . . . . . . . . . . . . . .

(2,543)

1,341

1,691

2,309

2,798

Net income (loss) per share attributable

to Vicor Corporation:
Basic and diluted . . . . . . . . . . . . . . . .

(0.06)

0.03

0.04

0.06

0.07

In the fourth quarter of 2010, the Company recorded the following adjustments:

k Recognition of deferred revenue of $4,729,000 and $4,524,000 in deferred costs in connection with

the accounting for a multiple-element revenue arrangement.

In the fourth quarter of 2009, the Company recorded the following adjustments:

k Reversal to defer $1,476,000 in Net revenues and $1,045,000 in Cost of revenues in connection with

the accounting for a multiple-element revenue arrangement. The impact on prior quarters in 2009 was
not material.

k An unrealized gain of $476,000 in connection with the fair value measurements for its UBS ARS,
which are classified as trading securities, in “Other income, net” in the Consolidated Statements of
Operations.

k An unrealized loss of $466,000 in connection with the fair value measurements for its ARS Right, in

“Other income, net” in the Consolidated Statements of Operations.

k An increase of $290,000 to inventory reserves for potential excess and obsolete inventory charged

against Cost of revenues.

70

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND

FINANCIAL DISCLOSURE

None.

ITEM 9A. CONTROLS AND PROCEDURES

Attached as exhibits to this Form 10-K are certifications of our CEO and Chief Financial Officer
(“CFO”), which are required in accordance with Rule 13a-14 of the Exchange Act of 1934, as amended (the
“Exchange Act”). This “Controls and Procedures” section includes information concerning the controls and
controls evaluation referred to in the certifications.

(a) Evaluation of disclosure controls and procedures

As required by Rule 13a-15 under the Exchange Act, management, with the participation of our CEO and

CFO, conducted an evaluation regarding the effectiveness of our disclosure controls and procedures, as of the
end of the last fiscal year. In designing and evaluating our disclosure controls and procedures, we recognize
that any controls and procedures, no matter how well designed and operated, can provide only reasonable
assurance of achieving the desired control objectives, and management necessarily was required to apply its
judgment in evaluating and implementing possible controls and procedures. Based upon that evaluation, our
management, including our CEO and CFO, has concluded that our disclosure controls and procedures are
reasonably effective to ensure that information required to be disclosed in the reports we file or submit under
the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the
Securities and Exchange Commission’s rules and forms. We intend to continue to review and document our
disclosure controls and procedures, including our internal controls and procedures for financial reporting, and
we may from time to time make changes to the disclosure controls and procedures to enhance their
effectiveness and to ensure that our systems evolve with our business.

(b) Management’s Report on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial

reporting to provide reasonable assurance regarding the reliability of our financial reporting and the
preparation of financial statements for external purposes in accordance with generally accepted accounting
principles. Internal control over financial reporting includes those policies and procedures that (a) pertain to
the maintenance of records that in reasonable detail accurately and fairly reflect the transactions and
dispositions of our assets; (b) provide reasonable assurance that transactions are recorded as necessary to
permit preparation of financial statements in accordance with generally accepted accounting principles, and
that receipts and expenditures are being made only in accordance with authorizations of our management and
Board of Directors; and (c) provide reasonable assurance regarding prevention or timely detection of
unauthorized acquisition, use, or disposition of our assets that could have a material effect on our financial
statements.

Management assessed our internal control over financial reporting as of December 31, 2010, the end of

our fiscal year. Management based its assessment on criteria established in “Internal Control — Integrated
Framework” issued by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”).
Management’s assessment included evaluation of such elements as the design and operating effectiveness of
key financial reporting controls, process documentation, accounting policies, and our overall control
environment.

Based on our assessment, management has concluded that our internal control over financial reporting

was effective as of December 31, 2010.

The effectiveness of our internal control over financial reporting as of December 31, 2010 has been
audited by Grant Thornton LLP, our independent registered public accounting firm, as stated in their report
which is included immediately below.

71

To The Board of Directors and Stockholders of
Vicor Corporation:

We have audited Vicor Corporation (a Delaware Corporation) and its subsidiaries (collectively, “the
Company”) internal control over financial reporting as of December 31, 2010, based on criteria established in
Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the
Treadway Commission (COSO). Vicor Corporation and subsidiaries’ management is responsible for maintain-
ing effective internal control over financial reporting and for its assessment of the effectiveness of internal
control over financial reporting, included in the accompanying Management’s Report on Internal Control Over
Financial Reporting. Our responsibility is to express an opinion on Vicor Corporation’s internal control over
financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight

Board (United States). Those standards require that we plan and perform the audit to obtain reasonable
assurance about whether effective internal control over financial reporting was maintained in all material
respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing
the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of
internal control based on the assessed risk, and performing such other procedures as we considered necessary
in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A company’s internal control over financial reporting is a process designed to provide reasonable

assurance regarding the reliability of financial reporting and the preparation of financial statements for external
purposes in accordance with generally accepted accounting principles. A company’s internal control over
financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that,
in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company;
(2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial
statements in accordance with generally accepted accounting principles, and that receipts and expenditures of
the company are being made only in accordance with authorizations of management and directors of the
company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized
acquisition, use, or disposition of the company’s assets that could have a material effect on the financial
statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect
misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that
controls may become inadequate because of changes in conditions, or that the degree of compliance with the
policies or procedures may deteriorate.

In our opinion, Vicor Corporation and subsidiaries maintained, in all material respects, effective internal

control over financial reporting as of December 31, 2010, based on criteria established in Internal Control-
Integrated Framework issued by COSO.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight
Board (United States), the consolidated balance sheets of Vicor Corporation and subsidiaries as of Decem-
ber 31, 2010 and 2009, and the related consolidated statements of operations, equity and cash flows for each
of the three years in the period ended December 31, 2010 and our report dated March 3, 2011 expressed an
unqualified opinion.

/s/ Grant Thornton LLP

Boston, Massachusetts
March 3, 2011

72

(c) Inherent Limitations on Effectiveness of Controls

The Company’s management, including the CEO and CFO, does not expect that our disclosure controls or
our internal control over financial reporting will prevent or detect all errors and all fraud. A control system, no
matter how well designed and operated, can provide only reasonable, not absolute, assurance that the control
system’s objectives will be met. The design of a control system must reflect the fact that there are resource
constraints, and the benefits of controls must be considered relative to their costs. Further, because of the
inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that
misstatements due to error or fraud will not occur or that all control issues and instances of fraud, if any,
within the Company have been detected. These inherent limitations include the realities that judgments in
decision-making can be faulty and that breakdowns can occur because of simple error or mistake. Controls
can also be circumvented by the individual acts of some persons, by collusion of two or more people, or by
management override of the controls. The design of any system of controls is based in part on certain
assumptions about the likelihood of future events, and there can be no assurance that any design will succeed
in achieving its stated goals under all potential future conditions. Projections of any evaluation of controls
effectiveness to future periods are subject to risks. Over time, controls may become inadequate because of
changes in conditions or deterioration in the degree of compliance with policies or procedures.

(d) Changes in Internal Control Over Financial Reporting

There was no change in our internal control over financial reporting that occurred during the fiscal
quarter ended December 31, 2010, that has materially affected, or is reasonably likely to materially affect, the
Company’s internal control over financial reporting.

73

ITEM 9B. OTHER INFORMATION

None.

PART III

ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

Incorporated by reference from the Company’s Definitive Proxy Statement for its 2011 annual meeting of

stockholders.

ITEM 11. EXECUTIVE COMPENSATION

Incorporated by reference from the Company’s Definitive Proxy Statement for its 2011 annual meeting of

stockholders.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND

RELATED STOCKHOLDER MATTERS

Incorporated by reference from the Company’s Definitive Proxy Statement for its 2011 annual meeting of

stockholders.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS AND DIRECTOR

INDEPENDENCE

Incorporated by reference from the Company’s Definitive Proxy Statement for its 2011 annual meeting of

stockholders.

ITEM 14. PRINCIPAL ACCOUNTANT FEES AND SERVICES

Incorporated by reference from the Company’s Definitive Proxy Statement for its 2011 annual meeting of

stockholders.

PART IV

ITEM 15. EXHIBITS AND FINANCIAL STATEMENTS

(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.

74

(b) Exhibits

Exhibits

3.1
3.2

3.3

3.4

3.5
4.1
10.1
10.2
10.3
10.4
10.5

10.6
10.7
10.8

10.9
10.10

10.11

10.12

21.1
23.1
31.1

31.2

32.1

32.2

(1)

(2)

(3)

(4)

(cid:129)
(cid:129)

(cid:129)

(cid:129)

(cid:129)
(cid:129)
(cid:129)
(cid:129)
(cid:129)
(cid:129)
(cid:129)

(cid:129)
(cid:129)
(cid:129)

(cid:129)
(cid:129)

(cid:129)

(cid:129)

(cid:129)
(cid:129)
(cid:129)

(cid:129)

(cid:129)

(cid:129)

Description of Document

Restated Certificate of Incorporation, dated February 28, 1990(1)
Certificate of Ownership and Merger Merging Westcor Corporation, a Delaware
Corporation, into Vicor Corporation, a Delaware Corporation, dated December 3,
1990(1)
Certificate of Amendment of Restated Certificate of Incorporation, dated May 10,
1991(1)
Certificate of Amendment of Restated Certificate of Incorporation, dated June 23,
1992(1)
Bylaws, as amended(9)
Specimen Common Stock Certificate(2)
1984 Stock Option Plan of the Company, as amended(2)
1993 Stock Option Plan(3)
1998 Stock Option and Incentive Plan(4)
Amended and Restated 2000 Stock Option and Incentive Plan(5)
Form of Non-Qualified Stock Option under the Vicor Corporation Amended and
Restated 2000 Stock Option and Incentive Plan(6)
Sales Incentive Plan(7)
Picor Corporation 2001 Stock Option and Incentive Plan(8)
Form of Non-Qualified Stock Option under the Picor Corporation 2001 Stock Option
and Incentive Plan(8)
V*I Chip Corporation Amended 2007 Stock Option and Incentive Plan(11)
Form of Non-Qualified Stock Option Agreement under the V*I Chip Corporation
Amended 2007 Stock Option and Incentive Plan(10)
Form of Incentive Stock Option Agreement under the V*I Chip Corporation Amended
2007 Stock Option and Incentive Plan(11)
Form of Stock Restriction Agreement under the V*I Chip Corporation Amended 2007
Stock Option and Incentive Plan(11)
Subsidiaries of the Company(12)
Consent of Grant Thornton LLP(12)
Certification of Chief Executive Officer pursuant to Rule 13a-14(a) of the Securities
Exchange Act of 1934(12)
Certification of Chief Financial Officer pursuant to Rule 13a-14(a) of the Securities
Exchange Act of 1934(12)
Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002(12)
Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002(12)

Filed as an exhibit to the Company’s Annual Report on Form 10-K filed on March 29, 2001 and
incorporated herein by reference.

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

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.
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.

75

(5)

(6)

(7)

(8)

(9)

(10)

(11)

(12)

Filed as an exhibit to the Company’s Proxy Statement for use in connection with its 2002 Annual
Meeting of Stockholders, which was filed on April 29, 2002, and incorporated herein by reference.

Filed as an exhibit to the Company’s Quarterly Report on Form 10-Q filed on November 4, 2004 and
incorporated herein by reference.

Filed as an exhibit to the Company’s Annual Report on Form 10-K filed on March 16, 2005 and
incorporated herein by reference.
Filed as an exhibit to the Company’s Annual Report on Form 10-K filed on March 14, 2006 and
incorporated herein by reference.
Filed as an exhibit to the Company’s Quarterly Report on Form 10-Q filed on November 8, 2006 and
incorporated herein by reference.

Filed as an exhibit to the Company’s Current Report on Form 8-K, dated June 6, 2007 and incorpo-
rated herein by reference.

Filed as an exhibit to the Company’s Current Report and Form 8-K, dated March 6, 2008 incorporated
herein by reference.
Filed herewith.

76

VICOR CORPORATION

SCHEDULE II
VALUATION AND QUALIFYING ACCOUNTS
Years ended December 31, 2010, 2009 and 2008

Description

Allowance for doubtful accounts:

Year ended:

Balance at
Beginning of Period

(Credit) Charge
to Costs and
Expenses

Other Charges,
Deductions(1)

Balance at
End of Period

December 31, 2010 . . . . . . . . . . . . . .
December 31, 2009 . . . . . . . . . . . . . .
December 31, 2008 . . . . . . . . . . . . . .

$260,000
300,000
398,000

$57,000
3,000
39,000

$ (8,000)
(43,000)
(137,000)

$309,000
260,000
300,000

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

Description

Inventory Reserves:

Year ended:

Balance at
Beginning of Period

(Credit) Charge
to Costs and
Expenses

Other Charges,
Deductions(2)

Balance at
End of Period

December 31, 2010 . . . . . . . . . . . . . .
December 31, 2009 . . . . . . . . . . . . . .
December 31, 2008 . . . . . . . . . . . . . .

$5,943,000
6,358,000
7,646,000

$1,721,000
1,010,000
923,000

$(2,220,000)
(1,425,000)
(2,211,000)

$5,444,000
5,943,000
6,358,000

(2) Reflects amounts associated with inventory that have been discarded or sold.

77

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.

SIGNATURES

Vicor Corporation

By: /s/

James A. Simms

James A. Simms
Vice President, Chief Financial Officer

Date: March 3, 2011

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
Patrizio Vinciarelli

/s/

James A. Simms
James A. Simms

/s/ Estia J. Eichten
Estia J. Eichten

/s/ David T. Riddiford
David T. Riddiford

/s/ Barry Kelleher
Barry Kelleher

/s/ Samuel Anderson
Samuel Anderson

/s/ Claudio Tuozzolo
Claudio Tuozzolo

/s/

Jason L. Carlson
Jason L. Carlson

/s/ Liam K. Griffin
Liam K. Griffin

President, Chief Executive Officer and
Chairman of the Board (Principal
Executive Officer)

March 3, 2011

Chief Financial Officer Vice President
(Principal Financial Officer and Principal
Accounting Officer)

March 3, 2011

Director

March 3, 2011

Director

March 3, 2011

Director

March 3, 2011

Director

March 3, 2011

Director

March 3, 2011

Director

March 3, 2011

Director

March 3, 2011

78

EXHIBIT 21.1

Name

SUBSIDIARIES OF THE COMPANY

State or Jurisdiction
of Incorporation

Picor Corporation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Delaware, USA
V*I Chip Corporation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Delaware, USA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . California, USA
VLT, Inc.
Vicor GmbH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Germany
VICR Securities Corporation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Massachusetts, USA
Vicor France SARL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . France
Vicor Italy SRL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vicor Hong Kong Ltd. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hong Kong
Vicor U.K. Ltd. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . United Kingdom
Vicor B.V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Netherlands
Vicor Japan Company, Ltd.
Vicor Development Corporation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Delaware, USA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Delaware, USA
Aegis Power Systems, Inc.
Mission Power Systems, Inc.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Delaware, USA
Northwest Power Integration, Inc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Delaware, USA
Converpower Corporation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Delaware, USA
Freedom Power Systems, Inc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Delaware, USA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Japan

Italy

(This page intentionally left blank)

Exhibit 31.1

CHIEF EXECUTIVE OFFICER CERTIFICATION

I, Patrizio Vinciarelli, certify that:

1.

2.

3.

4.

I have reviewed this report on Form 10-K of Vicor Corporation;

Based on my knowledge, this report does not contain any untrue statement of a material fact or omit
to state a material fact necessary to make the statements made, in light of the circumstances under
which such statements were made, not misleading with respect to the period covered by this report;

Based on my knowledge, the financial statements, and other financial information included in this
report, fairly present in all material respects the financial condition, results of operations and cash
flows of the registrant as of, and for, the periods presented in this report;

The registrant’s other certifying officers and I are responsible for establishing and maintaining
disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and
internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f))
for the registrant and have:

a)

b)

c)

d)

Designed such disclosure controls and procedures, or caused such disclosure controls and
procedures to be designed under our supervision, to ensure that material information relating to
the registrant, including its consolidated subsidiaries, is made known to us by others within
those entities, particularly during the period in which this report is being prepared;

Designed such internal control over financial reporting, or caused such internal control over
financial reporting to be designed under our supervision, to provide reasonable assurance
regarding the reliability of financial reporting and the preparation of financial statements for
external purposes in accordance with generally accepted accounting principles;

Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented
in this report our conclusions about the effectiveness of the disclosure controls and procedures,
as of the end of the period covered by this report based on such evaluation; and

Disclosed in this report any change in the registrant’s internal control over financial reporting
that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal
quarter in the case of an annual report) that has materially affected, or is reasonably likely to
materially affect, the registrant’s internal control over financial reporting; and

5.

The registrant’s other certifying officers and I have disclosed, based on our most recent evaluation
of internal control over financial reporting, to the registrant’s auditors and the audit committee of
the registrant’s board of directors (or persons performing the equivalent functions):

a)

b)

All significant deficiencies and material weaknesses in the design or operation of internal
control over financial reporting which are reasonably likely to adversely affect the registrant’s
ability to record, process, summarize and report financial information; and

Any fraud, whether or not material, that involves management or other employees who have a
significant role in the registrant’s internal control over financial reporting.

Dated: March 3, 2011

/s/ Patrizio Vinciarelli
Patrizio Vinciarelli
Chief Executive Officer

(This page intentionally left blank)

Exhibit 31.2

CHIEF FINANCIAL OFFICER CERTIFICATION

I, James A. Simms, certify that:

1.

2.

3.

4.

I have reviewed this report on Form 10-K of Vicor Corporation;

Based on my knowledge, this report does not contain any untrue statement of a material fact or omit
to state a material fact necessary to make the statements made, in light of the circumstances under
which such statements were made, not misleading with respect to the period covered by this report;

Based on my knowledge, the financial statements, and other financial information included in this
report, fairly present in all material respects the financial condition, results of operations and cash
flows of the registrant as of, and for, the periods presented in this report;

The registrant’s other certifying officers and I are responsible for establishing and maintaining
disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and
internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f))
for the registrant and have:

a)

b)

c)

d)

Designed such disclosure controls and procedures, or caused such disclosure controls and
procedures to be designed under our supervision, to ensure that material information relating to
the registrant, including its consolidated subsidiaries, is made known to us by others within
those entities, particularly during the period in which this report is being prepared;

Designed such internal control over financial reporting, or caused such internal control over
financial reporting to be designed under our supervision, to provide reasonable assurance
regarding the reliability of financial reporting and the preparation of financial statements for
external purposes in accordance with generally accepted accounting principles;

Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented
in this report our conclusions about the effectiveness of the disclosure controls and procedures,
as of the end of the period covered by this report based on such evaluation; and

Disclosed in this report any change in the registrant’s internal control over financial reporting
that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal
quarter in the case of an annual report) that has materially affected, or is reasonably likely to
materially affect, the registrant’s internal control over financial reporting; and

5.

The registrant’s other certifying officers and I have disclosed, based on our most recent evaluation
of internal control over financial reporting, to the registrant’s auditors and the audit committee of
the registrant’s board of directors (or persons performing the equivalent functions):

a)

b)

All significant deficiencies and material weaknesses in the design or operation of internal
control over financial reporting which are reasonably likely to adversely affect the registrant’s
ability to record, process, summarize and report financial information; and

Any fraud, whether or not material, that involves management or other employees who have a
significant role in the registrant’s internal control over financial reporting.

Dated: March 3, 2011

James A. Simms

/s/
James A. Simms
Vice President, Chief Financial Officer

(This page intentionally left blank)

Exhibit 32.1

CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Vicor Corporation (the “Company”) on Form 10-K for the
period ending December 31, 2010 as filed with the Securities and Exchange Commission on the date hereof
(the “Report”), I, Patrizio Vinciarelli, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C.
Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)

(2)

The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities
Exchange Act of 1934; and

The information contained in the Report fairly presents, in all material respects, the financial
condition and results of operations of the Company.

/s/ Patrizio Vinciarelli
Patrizio Vinciarelli
President, Chairman of the Board and
Chief Executive Officer

March 3, 2011

A signed original of this written statement required by Section 906 has been provided to the Company
and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff
upon request.

Exhibit 32.2

CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Vicor Corporation (the “Company”) on Form 10-K for the
period ending December 31, 2010 as filed with the Securities and Exchange Commission on the date hereof
(the “Report”), I, James A. Simms, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C.
Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)

(2)

The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities
Exchange Act of 1934; and

The information contained in the Report fairly presents, in all material respects, the financial
condition and results of operations of the Company.

James A. Simms

/s/
James A. Simms
Vice President, Chief Financial Officer

March 3, 2011

A signed original of this written statement required by Section 906 has been provided to the Company
and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff
upon request.

39237_ifcibcQ7.qxp:39237_ifcibcQ7  4/29/11  11:00 PM  Page 1

Corporate Officers

Philip D. Davies
Vice President, Global Sales and Marketing

H. Allen Henderson
Vice President, Vicor Corporation; President, Westcor Division

Barry Kelleher
President, Brick Business Unit

Richard J. Nagel, Jr.
Vice President, Chief Accounting Officer 

Douglas W. Richardson
Vice President, Chief Information Officer

James A. Simms
Chief Financial Officer and Secretary

Patrizio Vinciarelli
Chairman of the Board, President and Chief Executive Officer

Richard E. Zengilowski
Vice President, Human Resources

Board of Directors

Samuel J. Anderson
President, Chief Executive Officer and Chairman of the Board 
Great Wall Semiconductor Corporation
Jason L. Carlson a,c
President and Chief Executive Officer, QD Vision, Inc   . 
Estia J. Eichten a,c
Senior Scientist, Fermi National Accelerator Laboratory
Liam K. Griffinc
Senior Vice President, Sales and Marketing, Skyworks Solutions, Inc.

Barry Kelleher
President, Brick Business Unit

David T. Riddiford a,c
Private Investor

James A. Simms
Chief Financial Officer and Secretary

Claudio Tuozzolo
President of Picor Corporation

Patrizio Vinciarelli
Chairman of the Board, President and Chief Executive Officer

Common Stock
Vicor shares are traded on the 
NASDAQ Stock Market®
under the symbol “VICR”.

Transfer Agent
Computershare Investor Services
Providence, Rhode Island
1-877-282-1169

Counsel
Foley & Lardner LLP
Boston, Massachusetts

Auditors
Grant Thornton LLP
Boston, Massachusetts

a Audit Committee      c Compensation Committee

39237_Cov_Rev  4/29/11  7:07 PM  Page 1

25 Frontage Road, Andover, MA 01810
(978) 470-2900
vicorpower.com

VCRCM-AR-11