KOMAG INC /DE/
DEF 14A, 1998-04-17
MAGNETIC & OPTICAL RECORDING MEDIA
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                            SCHEDULE 14A INFORMATION

                  Proxy Statement Pursuant to Section 14(a) of
                       the Securities Exchange Act of 1934
                               (Amendment no. __)


Filed by the Registrant    [X]                       
Filed by a party other than the Registrant   [ ]

Check the appropriate box:                 
[ ]  Preliminary Proxy Statement           [ ]  Confidential, for Use of the   
[X]  Definitive Proxy Statement                 Commission Only (as permitted by
[ ]  Definitive Additional Materials            Rule 14a-6(e)(2))               
[ ]  Soliciting Material Pursuant to       
     Rule 14a-11(c) or Rule 14a-12       


                              KOMAG, INCORPORATED
                ------------------------------------------------
                (Name of Registrant as Specified in Its Charter)


    ------------------------------------------------------------------------
    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)


Payment of filing fee (Check the appropriate box):

[X]  No fee required.
[ ]  Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and 0-11.


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

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

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

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

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

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

(4)   Proposed maximum aggregate value of transaction:

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

(5)   Total fee paid:

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

[ ]   Fee paid previously with preliminary materials.
- --------------------------------------------------------------------------------

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

(1)   Amount previously paid:

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

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

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

(3)  Filing party:

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

(4)  Date filed:

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


<PAGE>



                               KOMAG, INCORPORATED
                             1704 Automation Parkway
                           San Jose, California 95131

                    NOTICE OF ANNUAL MEETING OF STOCKHOLDERS
                             TO BE HELD MAY 27, 1998


         The annual  meeting of  stockholders  (the  "Annual  Meeting" of Komag,
Incorporated (the "Company")) will be held at Komag,  Incorporated,  Building 9,
1705 Automation Parkway, San Jose, California, 95131 on Wednesday, May 27, 1998,
at 10:00 a.m. for the following purposes:


         1.       To elect the Board of Directors for the following year.

         2.       To approve an amendment to the Company's  1988 Employee  Stock
                  Purchase  Plan to  increase  the  number  of  shares  issuable
                  thereunder by 1,300,000 shares.

         3.       To ratify the  appointment of Ernst & Young LLP as independent
                  auditors of the Company for the fiscal year ending  January 3,
                  1999.

         4.       To transact  such other  business as may properly  come before
                  the meeting or any adjournment thereof.

         The foregoing  items of business are more fully  described in the Proxy
Statement  accompanying  this  Notice.  Stockholders  of  record at the close of
business on March 30, 1998 will be  entitled  to vote at the Annual  Meeting.  A
list of  stockholders  entitled to vote at the Annual  Meeting will be available
for inspection at the offices of the Company.  Whether or not you plan to attend
the Annual Meeting in person, please sign, date and return the enclosed proxy in
the reply  envelope  provided.  If you  attend the  Annual  Meeting  and vote by
ballot,  your  proxy  will be  revoked  automatically  and only your vote at the
Annual  Meeting will be counted.  The prompt return of your proxy will assist us
in preparing for the Annual Meeting.

         All stockholders are cordially invited to attend the Annual Meeting.  A
map to  Komag's  location  is  included  at the end of the Proxy  Statement  for
reference.


                                           BY ORDER OF THE BOARD OF DIRECTORS

                                           Stephen C. Johnson,
                                           President and Chief Executive Officer


                                           Tu Chen,
                                           Chairman of the Board


San Jose, California
April 10, 1998


<PAGE>


                               KOMAG, INCORPORATED
                             1704 Automation Parkway
                           San Jose, California 95131

                                 PROXY STATEMENT
                     FOR THE ANNUAL MEETING OF STOCKHOLDERS
                             TO BE HELD MAY 27, 1998


                                     GENERAL

         The enclosed  proxy is solicited on behalf of the Board of Directors of
Komag,  Incorporated,  a Delaware  corporation (the  "Company"),  for use at the
Annual  Meeting to be held on May 27,  1998.  The Annual  Meeting  will begin at
10:00 a.m. at Komag,  Incorporated,  Building 9, 1705  Automation  Parkway,  San
Jose,  CA 95131.  Stockholders  of record on March 30,  1998 will be entitled to
notice of and to vote at the Annual Meeting.

         This Proxy  Statement and  accompanying  proxy (the "Proxy") were first
mailed to stockholders on or about April 17, 1998.

Voting

         On March 30, 1998, the record date for  determination  of  stockholders
entitled to vote at the Annual Meeting,  there were 52,894,878  shares of Common
Stock  outstanding.  Each stockholder is entitled to one (1) vote for each share
of  Common  Stock  held by such  stockholder.  Directors  will be  elected  by a
plurality vote. Other matters submitted for stockholder  approval at this Annual
Meeting  will be decided  by the  affirmative  vote of a majority  of the shares
present or  represented  and entitled to vote on each such  matter.  Abstentions
with respect to any matter  other than the election of directors  are treated as
shares present or represented  and entitled to vote on that matter and thus have
the same effect as negative  votes. If shares are not voted by the broker who is
the  record  holder  of  the  shares,  or if  shares  are  not  voted  in  other
circumstances  in which proxy  authority is defective or has been  withheld with
respect to any matter,  these  non-voted  shares are not deemed to be present or
represented  for purposes of determining  whether  stockholder  approval of that
matter has been obtained.  Each stockholder voting for the election of directors
may cumulate such stockholder's  vote. Under cumulative voting, a stockholder is
allowed  one (1) vote per share  multiplied  by the  number of  directors  to be
elected  (nine (9) at this meeting) and may cast such  cumulative  total for one
(1)  nominee  or may  distribute  such  number  among as many  nominees  as such
stockholder chooses.

Revocability of Proxies

         Any person giving a proxy has the power to revoke it at any time before
its exercise. A proxy may be revoked by filing with the Secretary of the Company
at the Company's principal executive office, 1704 Automation Parkway,  San Jose,
California,  95131,  a notice of revocation or another signed proxy with a later
date.  You may also revoke your proxy by attending the Annual Meeting and voting
in person.

Solicitation

         The Company will bear the entire cost of  solicitation,  including  the
preparation,  assembly,  printing  and mailing of this Proxy  Statement  and any
additional   soliciting   materials   furnished  to   stockholders.   Copies  of
solicitation materials will be furnished to brokerage houses,  fiduciaries,  and
custodians  holding shares in their names that are beneficially  owned by others
so that they may forward these solicitation materials to such beneficial owners.
In  addition,  the  Company  may  reimburse  such  persons  for  their  costs of
forwarding the solicitation  materials to such beneficial  owners.  The original
solicitation  of  proxies  by  mail  may  be  supplemented  by  solicitation  by
telephone,  telegram or other means by directors,  officers, employees or agents
of the Company. No additional compensation will be paid to these individuals for
any such  services.  Except as described  above,  the Company does not presently
intend to solicit proxies other than by mail.



<PAGE>


Principal Stockholders


<TABLE>
         The following table sets forth certain information known to the Company
regarding the  ownership of the Company's  Common Stock per Schedule 13G filings
prior to March 30, 1998 for all persons who are known to be beneficial owners of
five percent or more of the Company's Common Stock.

<CAPTION>
   Name and Address of                                                                                  Percent
   Beneficial Owner                        Amount and Nature of Beneficial Ownership                    of Class
   ----------------                        -----------------------------------------                    --------
<S>                                        <C>                                                           <C>
Franklin Resources, Inc.                   5,420,485                                                     10.2%
777 Mariners Island Boulevard
San Mateo, CA  94404                       (sole)  voting  power  and  dispositive  power  as to
                                           5,023,700  shares by Franklin  Advisers,  Inc.;  sole
                                           voting   power  as  to   113,000   shares   and  sole
                                           dispositive  power as to 380,900  shares by  Franklin
                                           Advisory Services, Inc.; sole dispositive power as to
                                           15,885  shares  by  Franklin  Management,   Inc.  per
                                           February 14, 1998 Schedule 13G filing)

Neuberger & Berman, LLC                    4,620,024                                                      8.7%
605 Third Avenue
New York, NY 10158-3698                    (shared  dispositive  power  as to all  shares;  sole
                                           voting  power  as to  2,745,024  of such  shares  and
                                           shared  voting  power  as  to  1,850,000  shares  per
                                           February 9, 1998 Schedule 13G filing)

Merrill Lynch Asset Management             4,562,400                                                      8.6%
800 Scudders Mill Road
Plainsboro, NJ  08536                      (shared  dispositive power and shared voting power as
                                           to all such shares per  February  14,  1998  Schedule
                                           13G  filing)  Note:  The Company  believes  that this
                                           stockholder  disposed  of shares  subsequent  to this
                                           Schedule 13G filing,  thereby  reducing  ownership to
                                           less than 2,000,000 shares and less than 5% of class.

Barclays Global Fund Advisors              3,079,463                                                      5.8%
45 Fremont Street
San Francisco, CA 94105                    (sole dispositive power as to all shares; sole voting
                                           power as to 3,055,463 of such shares per February 13,
                                           1998 Schedule 13G filing)

Spears, Benzak, Salomon & Farrell, Inc.    2,877,084                                                      5.5%
127 Public Square
Cleveland, OH  44114-1306                  (sole voting power as to all shares, sole dispositive
                                           power as to 2,873,924 of such shares per February 13,
                                           1998 Schedule 13G filing)
</TABLE>

                                       2

<PAGE>


Stock Ownership Table

         The table  below  indicates  the number of shares of the  Corporation's
common stock beneficially owned as of March 30, 1998 by directors,  the nominees
recommended by the Nominating  Committee and nominated by the Board of Directors
for  election as  directors,  by each of the  executive  officers  listed in the
Summary Compensation Table below, and by all directors and executive officers as
a group.  Except as otherwise noted,  each person has sole investment and voting
powers  with  respect  to the  shares  shown as  beneficially  owned.  Ownership
information is based upon information furnished by the respective individuals.


                DIRECTORS, NOMINEES AND NAMED EXECUTIVE OFFICERS


                                                   Shares Beneficially Owned(12)
                                                   -----------------------------
         Name                                      Number          Percentage
         ----                                      ------          ----------

Tu Chen (1), ...................................     667,124           1.3%
                                                                  
Stephen C. Johnson (2) .........................     459,049            *
                                                                  
Craig R. Barrett(3) ............................      68,000            *
                                                                  
Chris A. Eyre(3) ...............................      47,000            *
                                                                  
Irwin Federman(4) ..............................      87,871            *
                                                                  
George A. Neil(5) ..............................      33,000            *
                                                                  
Max Palevsky(3) ................................     112,127            *
                                                                  
Anthony Sun(3) .................................      99,810            *
                                                                  
Masayoshi Takebayashi (6)(7) ...................      20,250            *
                                                                  
Willard Kauffman (8) ...........................     140,771            *
                                                                  
Christopher H. Bajorek (9) .....................      64,282            *
                                                                  
Fred J. Wiele (10) .............................      39,884            *
                                                                  
Executive officers and directors as a group                       
(21 persons) (11) ..............................   2,347,755           4.4%


*    Less than 1%

(1)  Includes 175,518 shares subject to options which are currently  exercisable
     or which will  become  exercisable  within  sixty (60) days after March 30,
     1998.

(2)  Includes 249,985 shares subject to options which are currently  exercisable
     or which will  become  exercisable  within  sixty (60) days after March 30,
     1998.

(3)  Includes  46,000 shares subject to options which are currently  exercisable
     or which will  become  exercisable  within  sixty (60) days after March 30,
     1998.

                                       3

<PAGE>


(4)  Includes  16,750 shares subject to options which are currently  exercisable
     or which will  become  exercisable  within  sixty (60) days after March 30,
     1998.

(5)  Includes  32,000 shares subject to options which are currently  exercisable
     or which will  become  exercisable  within  sixty (60) days after March 30,
     1998.

(6)  Includes  20,250 shares subject to options which are currently  exercisable
     or which will  become  exercisable  within  sixty (60) days after March 30,
     1998.

(7)  Excludes  shares  held by Kobe  Steel,  Ltd.  and Kobe  Steel USA  Holdings
     Incorporated.  Mr.  Takebayashi is an Executive  Officer of Kobe Precision,
     Incorporated,  a wholly-owned  subsidiary of Kobe Steel,  Ltd., and on such
     basis  may be  deemed,  under  the 1934 Act,  the  beneficial  owner of the
     2,000,002 shares beneficially owned by such corporations with shared voting
     and  investment  power with  respect  thereto.  Mr.  Takebayashi  disclaims
     beneficial ownership of these shares.

(8)  Includes  98,198 shares subject to options which are currently  exercisable
     or which will  become  exercisable  within  sixty (60) days after March 30,
     1998.

(9)  Includes  62,708 shares subject to options which are currently  exercisable
     or which will  become  exercisable  within  sixty (60) days after March 30,
     1998.

(10) Includes  38,333 shares subject to options which are currently  exercisable
     or which will  become  exercisable  within  sixty (60) days after March 30,
     1998.

(11) Includes   1,215,103   shares   subject  to  options  which  are  currently
     exercisable or which will become  exercisable  within sixty (60) days after
     March 30, 1998.

(12) Some of the  individuals  may share  voting power with regard to the shares
     listed herein with their spouses.


                                  ITEM NO. 1 --
                              ELECTION OF DIRECTORS

         The Bylaws of the Company  provide that the Board of Directors shall be
comprised of between eight (8) and twelve (12) directors,  with the exact number
to be fixed by the Board. The currently authorized number is nine (9) directors.
At the Annual  Meeting,  nine (9)  directors  will be elected to serve until the
Company's  next  Annual  Meeting  and until  their  successors  are  elected and
qualified.  The Board of Directors has selected  nine (9) nominees,  all of whom
are current directors of the Company.

          Each person nominated for election has agreed to serve if elected, and
management  has no reason to believe  that any nominee  will be  unavailable  to
serve.  Unless  otherwise  instructed,  the proxy  holders will vote the proxies
received by them FOR the nominees named below. The nine (9) candidates receiving
the highest  number of affirmative  votes of the shares  entitled to vote at the
Annual Meeting will be elected directors of the Company.

Recommendation of the Board of Directors

         The Board of Directors  recommends that the  stockholders  vote FOR the
election of each of the following  nominees to serve as directors of the Company
for the  ensuing  year  until  the  next  Annual  Meeting  at which  time  their
successors are elected and qualified.

                                       4

<PAGE>


Directors and Nominees

<TABLE>
         Set forth below is  information  regarding  the directors and nominees,
including  information furnished by them as to principal  occupations,  business
experience,  certain other directorships held by them, any arrangements pursuant
to which they were selected as directors or nominees.
<CAPTION>
                                                                                                 Year
                                                                                                 First
                                                                                                 Elected
         Name                                                                            Age     Director
         ----                                                                            ---     --------
<S>                                <C>                                                    <C>      <C>
Tu Chen ........................   Chairman of the Board of the Company                   63       1983
                                   
Stephen C. Johnson .............   President and Chief Executive Officer of the           55       1983
                                     Company
                                   
Craig R. Barrett ...............   Executive Vice President and  Chief Operating
                                     Officer, Intel Corporation                           58       1989      
                                   
Chris A. Eyre ..................   Private Investor                                       51       1983   
                                   
                                   
Irwin Federman .................   General Partner, U.S. Venture Partners                 62       1983
                                   
                                   
George A. Neil .................   Consultant to Asahi Glass America, Incorporated        60       1994
                                   
                                   
Max Palevsky ...................   Private Investor                                       73       1984
                                   
                                   
Anthony Sun ....................   General Partner, Venrock Associates                    45       1983
                                   
                                   
Masayoshi Takebayashi ..........   President, Chief Executive Officer,                    62       1992
                                     Kobe Precision, Incorporated
</TABLE>

         Dr.  Chen is a founder of the Company and has served as Chairman of the
Board of the Company from its inception in June 1983. From 1971 to June 1983, he
was a Member, Research Staff and principal scientist at Xerox Corporation's Palo
Alto  Research  Center.  From 1968 to 1971,  Dr. Chen was employed as a research
scientist for Northrop Corp. Dr. Chen is a director of Asahi Komag Co., Ltd. and
Headway Technologies, Incorporated.

         Mr.  Johnson is a founder of the Company  and has served as  President,
Chief Executive  Officer and a director of the Company since September 1983. Mr.
Johnson is a director of Asahi Komag Co. Ltd.,  Dastek Holding  Company,  Dastek
(M) Sdn. Bhd., Komag Distribution  Company,  Komag  Asia-Pacific,  Incorporated,
Komag  Technology  (N)  B.V.,  Komag  Netherlands  Antiles  N.V.,  and  Uniphase
Corporation.  From  1977  to  1983,  Mr.  Johnson  was an  officer  of  Boschert
Incorporated,  a manufacturer  of switching  power  supplies,  initially as Vice
President, Marketing and subsequently as President and Chief Executive Officer.

         Dr.  Barrett has served as a director of the Company  since April 1989.
Since 1974 he has been employed by Intel Corporation in a variety of capacities,
currently as a director  (elected  January 15, 1992) and as President  and Chief
Operating  Officer.  From 1993 to 1997 Dr.  Barrett was Executive Vice President
and Chief Operating Officer.  From 1990 to 1993 he was Senior Vice President and
General Manager of the Microcomputer Components Group. From 1987 to 1989, he was
Senior Vice  President  and General  Manager of the  Components  Technology  and
Manufacturing  Group,  and from 1985 to 1987,  he served as Vice  President  and
General Manager of the Components Technology and Manufacturing Group.


                                       5
<PAGE>

         Mr. Eyre has served as a director of the Company since  September 1983.
Mr. Eyre is a private investor and from 1980 to 1987 served as a general partner
of Merrill,  Pickard,  Anderson & Eyre, a general  partnership  which  manages a
series of venture capital partnerships.

         Mr.  Federman has served as a director of the Company  since  September
1983.  In April 1990,  Mr.  Federman  joined U.S.  Venture  Partners,  a general
partnership which manages a series of venture capital partnerships, as a general
partner.  From  February  1988 to March 1990,  Mr.  Federman  served as Managing
Director  of  Dillon,  Read  &  Co.  Incorporated,  an  investment  banking  and
securities  firm.  From 1979 until August 1987,  Mr.  Federman was President and
Chief Executive Officer of Monolithic Memories,  Incorporated.  Mr. Federman was
elected  Vice  Chairman of the Board of  Directors  of Advanced  Micro  Devices,
Incorporated  ("AMD") when  Monolithic  Memories  merged with AMD, and served in
that  capacity  until  January  1988.  He is also a director of Western  Digital
Corporation,  SanDisk  Corporation,   Checkpoint  Software  Technologies,  Ltd.,
Neomagic, Incorporated, and MMC Networks, Inc.

         Mr. Neil has served as Consultant to Asahi Glass America,  Incorporated
since  January  1997.  From 1990  through  1996,  Mr. Neil served as Senior Vice
President of Asahi Glass America, Incorporated. From March 1989 to January 1990,
Mr. Neil held several  executive  positions at various ceramic  companies.  From
August  1986  to  July  1990,  Mr.  Neil  was a  consultant  and  President  for
Thunderbird  Technologies,  a  company  specializing  in  high-speed,  low power
integrated  circuits.  From October 1961 to May 1986, Mr. Neil served in various
management  positions  with  Corning,  Incorporated,  including  Executive  Vice
President of Iwaki Glass and President of Corning  Japan.  Mr. Neil was selected
as a nominee pursuant to the terms of a Common Stock Purchase  Agreement between
the  Company  and Asahi Glass Co.  Ltd.  (See  "Additional  Information--Certain
Relationships and Related Transactions" below.)

         Mr.  Palevsky  has served as a director of the Company  since  November
1984.  He was a member of the  Governing  Board of the  Institute  for  Advanced
Study, Princeton, New Jersey. Mr. Palevsky retired as a director and Chairman of
the Executive  Committee of Xerox Corporation in 1972. He is a director emeritus
of Intel Corporation.

         Mr. Sun has served as a director of the Company since  September  1983.
Since 1979, he has been  associated with Venrock  Associates,  a venture capital
partnership, and has been a general partner since 1980. Mr. Sun is a director of
Cognex  Corporation,  Inference Corp., Award Software  International,  Worldtalk
Communications Corporation, 3Dfx Interactive Incorporated, and several privately
held companies.

         Mr. Takebayashi has served as a director of the Company since May 1992.
Since September 1964, he has served in various  positions with Kobe Steel,  Ltd.
and its  subsidiaries,  most recently as President,  Chief Executive  Officer of
Kobe Precision,  Incorporated,  a wholly-owned  subsidiary of Kobe Steel,  Ltd.,
since  January  1988.  From  January 1986 to December  1988,  he was the General
Manager, International Marketing and Sales Overseas Department of the Aluminum &
Copper Division of Kobe Steel, Ltd. He is a member of the board of directors for
Kobe Precision Technology Malaysia, Bhd., and a member of the Board of Directors
of Komag Material  Technology,  Incorporated.  Mr. Takebayashi was selected as a
nominee pursuant to the terms of a Common Stock Purchase  Agreement  between the
Company   and  Kobe   Steel  USA   Holdings   Incorporated.   (See   "Additional
Information--Certain Relationships and Related Transactions" below.)


Committees and Meetings of the Board of Directors

         During the fiscal year ended  December 28, 1997, the Board of Directors
held five (5) meetings.  During this period,  each of the directors  attended or
participated  in at least eighty percent (80%) of the aggregate  number of Board
of Directors  meetings and  committee  meetings of the Board on which he served.
The Company has five standing  committees:  an Audit  Committee,  a Compensation
Committee, a Primary Stock Option Plan Committee, a Nominating Committee,  and a
Special Stock Option Plan Administration Committee.


                                       6
<PAGE>

         The Audit Committee is primarily responsible for approving the services
performed by the Company's  independent  auditors and  reviewing  reports of the
Company's auditors regarding the Company's  accounting  practices and systems of
internal  accounting  controls.  The Audit Committee formally met four (4) times
during the last fiscal year. This Committee currently consists of Messrs.  Eyre,
Neil and Sun.

         The Compensation  Committee  reviews and approves the Company's general
compensation  policies and sets compensation  levels for the Company's executive
officers. This Committee currently consists of Dr. Barrett and Messrs. Federman,
Palevsky  and  Takebayashi.  During  fiscal  1997,  the  Compensation  Committee
formally met two (2) times. The Compensation Committee also met two (2) times in
January 1998 for discussion of fiscal 1997 and 1998 compensation matters.

         The Primary Stock Option Plan Committee  administers the  discretionary
option  grant  program of the  Company's  Restated  1987 Stock  Option Plan (the
"Option  Plan")  with  respect to the  Company  officers  who are subject to the
short-swing  profit  restrictions of the federal  securities laws. The Committee
will also administer the Company's  Employee Stock Purchase Plan. This Committee
currently consists of Dr. Barrett and Messrs. Federman and Palevsky. The Primary
Stock Option Plan  Committee met in September 1997 for discussion of fiscal 1997
and 1998 stock option matters.

         The Nominating  Committee is responsible for recommending  nominees for
members of the Company's Board of Directors.  This Committee  currently consists
of Dr. Chen, and Messrs.  Eyre,  Johnson,  Neil and  Takebayashi,  with Dr. Chen
serving as  Chairman.  This  Committee  met on March 18,  1998.  The  Nominating
Committee has not  instituted  proceedings to consider  nominees  recommended by
security holders, but may do so in the future.

         The Special Stock Option Plan Administration  Committee (the "Secondary
Committee")  has separate but  concurrent  jurisdiction  with the Primary  Stock
Option Plan  Committee to administer the  discretionary  option grant program of
the Option Plan with respect to non-officer employees. The option grants made by
the Secondary  Committee will comply with certain guidelines  established by the
Primary Stock Option Plan Committee.  The Secondary Committee currently consists
of Dr. Chen and Mr. Johnson and performs its duties on an ongoing basis.


Director Remuneration

         Non-employee  Board  members  receive  $4,500 per fiscal  quarter and a
$1,000  meeting  fee for each  Board of  Directors  meeting  or Board  Committee
meeting attended, including telephonic meetings.  Non-employee Board members are
also eligible to receive periodic option grants under the Automatic Option Grant
Program  in effect for them under the Option  Plan.  Each  individual  who first
becomes  a  non-employee   Board  member,   whether  through   election  by  the
stockholders  or  appointment  by the Board,  will receive,  at the time of such
initial  election or  appointment,  a stock  option  grant for 30,000  shares of
Common Stock. In addition, on the date of each Annual Stockholders Meeting, each
individual  who is  re-elected  as a  non-employee  Board member will receive an
option grant for 7,500 shares of Common,  provided such individual has served on
the Board for at least six months. Each option grant will have an exercise price
equal to the fair market  value of the option  shares on the grant date and will
have a maximum  term of ten  years,  subject  to  earlier  termination  upon the
optionee's cessation of Board service.

         Each of the  non-employee  Board Members  re-elected at the 1997 Annual
Meeting (Messrs.  Barrett, Eyre, Federman,  Neil, Palevsky, Sun and Takebayashi)
received at that time an option grant for 7,500 shares with an exercise price of
$34.125 per share. Each option will become exercisable for all the option shares
upon the  optionee's  completion of one year of Board service  measured from the
grant date. However,  the option will become immediately  exercisable for all of
the option shares upon an acquisition of the Company by merger, consolidation or
asset sale or upon certain other changes in control or ownership of the Company.
Upon the  successful  completion of a hostile  tender offer for more than 50% of
the Company's outstanding Common Stock, each of these options will automatically
be canceled,  and each optionee will in return receive a cash  distribution from
the Company in an amount per  canceled  option  share equal to the excess of (i)
the highest  reported  price per share of Common  Stock paid in the tender offer
over (ii) the option exercise price payable per share.


                                       7
<PAGE>

                       ITEM NO. 2 -- APPROVAL OF AMENDMENT
                      TO 1988 EMPLOYEE STOCK PURCHASE PLAN

Introduction

         The  stockholders  are being  asked to vote on a proposal to approve an
amendment to the Company's  1988  Employee  Stock  Purchase Plan (the  "Purchase
Plan")  which will  increase  the number of shares  available  for  issuance  by
1,300,000 shares of Common Stock. The Board of Directors believes that the share
increase is necessary to assure that  eligible  employees of the Company and its
participating  affiliates  will continue to have the  opportunity  to acquire an
equity  interest in the Company and thereby  further align their  interests with
those of the stockholders.

         The Purchase  Plan was adopted by the Board of Directors on January 21,
1988, and was approved by the stockholders on June 7, 1988. On January 30, 1998,
the Board of Directors  adopted the  amendment to the Purchase Plan which is the
subject of this Item No. 2.

         The  terms  and  provisions  of the  Purchase  Plan,  as  amended,  are
summarized  below.  This  summary,  however,  does not  purport to be a complete
description  of the  Purchase  Plan.  Copies of the actual plan  document may be
obtained by any stockholder upon written request to the Secretary of the Company
at the corporate offices in San Jose, California.

Administration

         The Purchase Plan will be administered by the Primary Stock Option Plan
Committee,  which consists of at least two non-employee  Board members appointed
by the Board. Such Committee, as Plan Administrator, has full authority to adopt
administrative  rules and  procedures  and to interpret  the  provisions  of the
Purchase  Plan.  All costs and expenses  incurred in the  administration  of the
Purchase Plan are paid by the Company without charge to participants.

Securities Subject to the Purchase Plan

         The  maximum  number  of shares  of  Common  Stock  that may be sold to
participants over the term of the Purchase Plan may not exceed 4,850,000 shares,
assuming  stockholder  approval  of this  Item No.  2.  However,  not more  than
1,660,088  shares may be issued  under the  Purchase  Plan after  March 30, 1998
(assuming  stockholder  approval of this Item No. 2). The shares of Common Stock
issuable  under the  Purchase  Plan may be  either  shares  newly  issued by the
Company or shares  reacquired by the Company,  including shares purchased on the
open market.

         In the event any  change is made to the  Company's  outstanding  Common
Stock (whether by reason of any recapitalization,  stock dividend,  stock split,
combination  of  shares,  or other  similar  change in the  corporate  structure
effected   without  the  Company's   receipt  of   consideration),   appropriate
adjustments  will be made to (i) the class  and  maximum  number  of  securities
purchasable  under the  Purchase  Plan,  (ii) the class  and  maximum  number of
securities  purchasable  per participant on any one purchase date, and (iii) the
class and number of securities purchasable and the price per share payable under
each outstanding  purchase right.  Such adjustments will prevent any dilution or
enlargement of participant rights under the Purchase Plan.


                                       8
<PAGE>

Eligibility and Participation

         Any  individual  who is  employed  on a basis  under which he or she is
expected  to work more than  twenty  (20)  hours per week for more than five (5)
months  per  calendar  year in the employ of the  Company  or any  participating
parent or subsidiary  corporation  (including any corporation which subsequently
becomes  such at any time during the term of the  Purchase  Plan) is eligible to
participate in the Purchase Plan upon  commencement  of  employment.  Currently,
Komag Material Technology,  Incorporated, Komag Asia-Pacific,  Incorporated, and
Komag U.S.A. (Malaysia) Sdn. are participating corporate affiliates.

         As of March 30, 1998,  3,189,912 shares of Common Stock had been issued
under the Purchase Plan, and 1,660,088 shares were available for future issuance
(assuming  stockholder  approval  of this Item No.  2).  As of March  30,  1998,
approximately 4,639 employees (including 14 executive officers) were eligible to
participate in the Purchase Plan.

Purchase Periods

         The  Purchase  Plan  will be  implemented  in a series  of  overlapping
purchase periods,  each to be of duration (not to exceed twenty-four (24) months
per  purchase  period)  as  determined  by the Plan  Administrator  prior to the
commencement  date of the purchase  period.  Purchase  periods may begin, at the
Plan  Administrator's  discretion,  on the first day or the first Monday of each
fiscal quarter or each alternate  fiscal  quarter.  Accordingly,  up to four (4)
separate  purchase  periods may  commence  in each fiscal year during  which the
Purchase Plan remains in existence.

         Participants  will be  granted  a  separate  purchase  right  for  each
purchase period in which they participate. The purchase right will be granted on
the first day of the purchase period and will  automatically be exercised on the
last date of each successive three (3)-month or six (6)-month period within that
purchase period ("Purchase  Date"). No employee may participate in more than one
purchase period at a time.

Purchase Price

         The purchase  price of the Common Stock  acquired on each Purchase Date
will be equal to  eighty-five  percent (85%) of the lower of (i) the fair market
value per  share of Common  Stock on the date on which  such  purchase  right is
granted or (ii) the fair market  value on such  Purchase  Date.  The fair market
value of Common Stock on any relevant  date will be the closing  price per share
on such date as reported on the Nasdaq  National  Market.  The fair market value
per share determined on such basis was $14.625 on March 30, 1998.

Purchase Rights and Stock Purchases

         Each participant may authorize periodic payroll deductions of up to ten
percent (10%) of his or her base pay during the relevant purchase period for the
purchase of Common Stock under the Purchase  Plan.  On each Purchase  Date,  the
accumulated payroll deductions of each participant will be automatically applied
to the purchase of whole shares of Common Stock at the purchase  price in effect
for that  Purchase  Date.  The  maximum  number  of  shares  purchasable  by the
participant  on any  Purchase  Date may not exceed  3,000  shares in the case of
quarterly  Purchase  Dates or 6,000 shares in the case of  semi-annual  Purchase
Dates. In addition,  no executive  officer of the Company may purchase more than
50,000 shares in the aggregate over the term of the Purchase Plan.


                                       9
<PAGE>
Termination of Purchase Rights

         The  purchase  right  of a  participant  will  terminate  upon (i) such
individual's  termination of employment or (ii) his or her voluntary  withdrawal
from the Purchase Plan. Any payroll  deductions  which the  participant may have
made with respect to the terminated  purchase  right will be refunded.  However,
should the  participant's  employment  terminate by reason of death or permanent
disability,  then that  participant (or the legal  representative  of his or her
estate)  may,  in lieu of such  refund,  elect to have the  accumulated  payroll
deductions applied to the purchase of Common Stock on the next Purchase Date.

Stockholder Rights

         No  participant  will have any  stockholder  rights with respect to the
shares  covered by his or her  purchase  right  until the  shares  are  actually
purchased on the participant's behalf. No adjustment will be made for dividends,
distributions  or other rights for which the record date is prior to the date of
such purchase.

Assignability

         No  purchase  rights  will  be  assignable  nor   transferable  by  the
participant  except by will or by laws of inheritance.  An outstanding  purchase
right may,  during  the  participant's  lifetime,  be  exercisable  only by that
participant.

Merger or Liquidation of Company

         In the event the Company or its stockholders enter into an agreement to
dispose of all or substantially  all of the assets or outstanding  capital stock
of the Company by means of a sale, merger or reorganization in which the Company
will not be the surviving corporation or in the event the Company is liquidated,
then all outstanding  purchase rights will, in connection with the  consummation
of such  transaction,  be exercised  immediately  prior to such  transaction  by
applying all payroll deductions  previously  collected from participants  during
the  purchase  period to the purchase of whole shares of Common Stock at a price
per share equal to eighty-five percent of the lower of (i) the fair market value
per share of Common Stock on the start date of the purchase period in which that
transaction  occurs  or (ii)  the fair  market  value  per  share at the time of
purchase.

Amendment and Termination

         The Purchase Plan will  terminate  upon the earlier of (i) December 31,
2001 or (ii) the date on which all shares available for issuance  thereunder are
sold pursuant to exercised purchase rights.  However,  the Board may at any time
alter,  suspend or discontinue  the Purchase Plan.  However,  the Board may not,
without stockholder  approval,  (i) increase the number of shares issuable under
the Purchase Plan,  except in connection  with certain  changes in the Company's
capital  structure,  (ii) alter the purchase  price  formula so as to reduce the
purchase price or (iii) modify the eligibility requirements for participation in
the Purchase Plan.


                                       10
<PAGE>


Stock Issuances
<TABLE>
         The table below shows, as to each of the Company's  executive  officers
named in the Summary  Compensation  Table and the various indicated groups,  the
number of shares of Common  Stock  purchased  under the  Purchase  Plan  between
January 1, 1997 and March 30,1998,  together with the weighted  average purchase
price paid per share.

                           PURCHASE PLAN TRANSACTIONS
- ---------------------------------------------------------------------------------------------------
<CAPTION>
                                                                    Number of      Weighted Average
  Name                                                          Purchased Shares     Purchase Price
  ----                                                          ----------------     --------------
<S>                                                                 <C>                  <C>
Stephen C. Johnson                                                      984              $13.97

Tu Chen                                                               1,077              $13.53

Christopher H. Bajorek                                                  984              $13.97

Willard Kauffman                                                        984              $13.97

Fred J. Wiele                                                         1,059              $13.61

All executive officers as a group (14 persons)                       12,642              $13.43

All employees, including current officers who are not               435,558              $13.02
executive officers, as a group (2,853 persons)
- ---------------------------------------------------------------------------------------------------
</TABLE>

New Plan Benefits

         As of March 30, 1998,  no purchase  rights had been  granted  under the
Purchase Plan on the basis of the  1,300,000-share  increase which forms part of
this Item No. 2.

Federal Tax Consequences

         The Purchase Plan is intended to be an "employee  stock  purchase plan"
within the meaning of Section 423 of the  Internal  Revenue  Code.  Under a plan
which so qualifies,  no taxable income will be recognized by a participant,  and
no  deductions  will be allowable  to the Company,  upon either the grant or the
exercise of the purchase  rights.  Taxable  income will not be recognized  until
there is a sale or other  disposition of the shares  acquired under the Purchase
Plan or in the event the participant should die while still owning the purchased
shares.
         If the participant sells or otherwise  disposes of the purchased shares
within two (2) years after the start date of the  offering  period in which such
shares were acquired or within one (1) year after the date on which those shares
were actually purchased,  then the participant will recognize ordinary income in
the year of sale or  disposition  equal to the  amount by which the fair  market
value of the shares on the purchase  date  exceeded the purchase  price paid for
those shares,  and the Company will be entitled to an income tax deduction,  for
the  taxable  year in which  such  disposition  occurs,  equal in amount to such
excess.

         If the participant  sells or disposes of the purchased shares more than
two (2) years after his or her entry date into the offering  period in which the
shares were  acquired  and more than one year after the  purchase  date of those
shares,  then the participant will recognize ordinary income in the year of sale
or  disposition  equal to the lesser of (i) the amount by which the fair  market
value of the shares on the sale or disposition  date exceeded the purchase price


                                       11
<PAGE>

paid for those shares or (ii) fifteen  percent (15%) of the fair market value of
the  shares on the  participant's  entry  date into that  offering  period.  Any
additional gain upon the disposition will be taxed as a long-term  capital gain.
The Company will not be entitled to an income tax deduction with respect to such
disposition.

         If the  participant  still  owns the  purchased  shares  at the time of
death, the lesser of (i) the amount by which the fair market value of the shares
on the date of death exceeds the purchase price or (ii) fifteen percent (15%) of
the fair market  value of the shares on his or her entry date into the  offering
period in which those shares were acquired will  constitute  ordinary  income in
the year of death.

Accounting Treatment

         Under current  accounting rules, the issuance of Common Stock under the
Purchase Plan will not result in a compensation  expense  chargeable against the
Company's  reported  earnings  provided  that  prior  to the  beginning  of each
offering period the Company has an authorized  share reserve equal to or greater
than the  number of shares  issued  during the  offering  period.  However,  the
Company must disclose, in notes to the Company's financial  statements,  the pro
forma impact which the purchase  rights  granted  under the Purchase  Plan would
have upon the  Company's  reported  earnings  were the  value of those  purchase
rights treated as compensation expense.

Recommendation of the Board of Directors

         The Company is seeking the affirmative vote of a majority of the issued
and  outstanding  shares present or represented and entitled to vote at the 1998
Annual  Meeting for approval of the amendment to the Purchase Plan. The Board of
Directors believes that the amendment to the Purchase Plan is necessary in order
to continue to provide  equity  incentives to attract and retain the services of
high quality employees.  For this reason, the Board of Directors recommends that
the stockholders vote FOR this proposal.  If the stockholders do not approve the
proposal,  then no purchase  rights will be granted under the Purchase Plan that
require usage of the 1,300,000-share  increase.  However, the Purchase Plan will
continue  in effect  until the  available  reserve  of  Common  Stock  under the
Purchase Plan as last approved by the stockholders is issued.


                                       12
<PAGE>



                                  ITEM NO. 3 --
                      RATIFICATION OF INDEPENDENT AUDITORS

         The Company is asking the stockholders to ratify the selection of Ernst
& Young LLP as the  Company's  independent  auditors  for the fiscal year ending
January 3, 1999. The affirmative vote of the holders of a majority of the shares
represented  and voting at the Annual  Meeting  will be  required  to ratify the
selection of Ernst & Young LLP.

         In the event the stockholders fail to ratify the appointment, the Board
of Directors will  reconsider its selection.  Even if the selection is ratified,
the  Board  in  its  discretion  may  direct  the  appointment  of  a  different
independent  accounting firm at any time during the year if the Board feels that
such  a  change  would  be  in  the  best  interests  of  the  Company  and  its
stockholders.  Unless  otherwise  instructed,  the proxy  holders  will vote the
proxies  received by them FOR the ratification of the selection of Ernst & Young
LLP.

         Ernst & Young  LLP  has  audited  the  Company's  financial  statements
annually beginning in 1986.  Representatives of the firm, who are expected to be
present at the Annual Meeting,  will have the opportunity to make a statement if
they desire to do so, and will be available to respond to appropriate questions.

Recommendation of the Board of Directors

         The affirmative vote of a majority of the issued and outstanding voting
shares is sought for the ratification of the selection of Ernst & Young LLP. The
Board of Directors recommends that the stockholders vote FOR this proposal.


                                       13
<PAGE>


Executive Compensation and Related Information

         In compliance with the Securities and Exchange Commission's regulations
on disclosure of Executive Compensation, this section presents the Report of the
Compensation  Committee, a Stock Performance Graph comparing Company stockholder
return relative to a broad market index and a peer group index,  and Summary and
Companion  Compensation  Tables  presenting  a  detailed  representation  of the
Company's executive compensation practices.

         REPORT OF THE COMPENSATION AND PRIMARY STOCK OPTION COMMITTEES
                            ON EXECUTIVE COMPENSATION

         The Compensation Committee's members, Craig R. Barrett, Irwin Federman,
Max Palevsky and Masayoshi  Takebayashi,  are independent  directors who are not
employees  of the  Company and who further  qualify as outside  directors  under
Section  162(m) of the Internal  Revenue  Code.  The  Compensation  Committee is
accountable  for  the  approval  of  cash  compensation   programs  that  fairly
compensate  key  executives  and  employees  and that  relate  the pay levels of
officers to the performance of the Company. The Primary Stock Option Committee's
members,   Craig  R.  Barrett,  Irwin  Federman  and  Max  Palevsky  qualify  as
disinterested persons for purposes of Rule 16b-3 adopted under the 1934 Act. The
Primary  Stock Option  Committee is  responsible  for all stock option grants to
executive officers.


Objectives of the Company's Executive Compensation Plan

         The Company's  executive  compensation is based on the premise that the
executive  officers are  responsible  for achievement of the Company's goals and
objectives  and  are  rewarded  when  achievement  of  these  goals  results  in
successful  financial  performance.  The plan is intended to control  fixed base
salary  costs,  to provide a high  degree of  compensation  leverage on both the
upside and the downside,  to allow flexibility to respond to specific individual
issues such as retention,  and to balance cost to stockholders against providing
appropriate  incentives  for value  creation.  To  structure  the actual  annual
compensation  plans, the Compensation  Committee relies on research performed by
an independent  compensation consulting firm and advice from the Company's human
resources  department.  For  comparison  purposes,  the Company has identified a
group of  high-performing  companies ("peer  companies") both within and outside
the Company's  industry.  The Company  competes with the peer  companies for the
hiring and retention of key  executives and  accordingly  compares its executive
compensation practices to these companies. Each peer company shares at least one
attribute,  such as high  technology,  location or size with the  Company.  Such
comparisons also include the relative  financial  performance of the Company and
the peer  companies.  Since  executive  search  and  retention  is not  industry
specific,  no attempt is made to correlate the list of peer  companies  with the
companies in Nasdaq Computer  Manufacturers  Index, the Company's Industry index
in the "Stock Performance Graph."

         The total  compensation  plan developed for each officer  includes base
salary,  incentive bonus and stock options in addition to  participation  in the
Company's  Cash and Deferred  Profit  Sharing and Employee  Stock Purchase Plans
subject to the same eligibility criteria applicable to all employees.  Executive
officers are also  eligible to defer salary under the Komag Savings and Deferred
Profit Sharing Plan and Non-qualified Deferred Compensation Plan. Base salary is
targeted at or below the 50th  percentile of base salaries for  executives  with
similar positions among the peer companies. The Compensation Committee considers
this level of base salary  sufficient,  in the context of the total compensation
package,  to attract and retain  executives of the caliber  required to manage a
company that employs  leading edge technology in a highly  competitive,  rapidly
changing  industry.  The Company's targeted base salary levels control the fixed
component of  compensation  in the event of poor business  conditions or Company
performance.  On an  individual by  individual  basis,  the base salaries of the
Company's  executive  officers  range  from  the  40th  percentile  to the  75th
percentile.   Variation   from  the   targeted   range  is  due  to   individual
qualifications,  including performance, specific technical knowledge, experience
and/or total targeted cash compensation as judged by the Compensation Committee.


                                       14
<PAGE>

         To complement base salary, the Compensation  Committee  administers the
Management Bonus Plan (the "Bonus Plan").  The Bonus Plan is designed to provide
substantial rewards for exceeding financial performance targets and little or no
payout when the Company performs poorly. Specifically, the Bonus Plan provides a
pool of funds  available for bonus  payments  based on the  Company's  operating
income as  compared  to the Annual  Operating  Plan as  approved by the Board of
Directors in the first quarter of each fiscal year. The maximum pool is equal to
7% of operating  income when actual operating income is greater than or equal to
122% of the Annual  Operating Plan. This percentage  declines  linearly to 2% of
operating  income at a level of 66.67% of the  Annual  Operating  Plan and to 0%
when there is no operating income or an operating loss. The pool is allocated to
the executives, up to each executive's  pre-established maximum allocation,  and
to other non-executive  employees,  in accordance with the plan formula approved
by the Company's stockholders.  Since the Company sustained an operating loss in
1997, no payments were accrued or paid under the Bonus Plan for the fiscal year.

         The Compensation Committee also administers the Company's Discretionary
Bonus Plan (the  "Discretionary  Plan").  The Discretionary  Plan is designed to
allow  the  Compensation  Committee  the  flexibility  to  grant a  bonus  to an
executive  if there is a specific  retention  issue  related to the  executive's
level of income or if an executive has achieved a substantial objective during a
time when the Bonus Plan cannot  provide a payout.  No such issues  arose during
1997 and  therefore  no  payments  were  accrued or made under this plan for the
fiscal year.

         In addition to cash compensation the Company's  executive  compensation
plan  includes  stock  options that are  designed to align the  interests of the
executive  officers with those of  stockholders,  providing  each officer with a
significant incentive to manage the Company from the long-term perspective of an
owner with an equity stake in the  business.  The stock  option plan  encourages
long-term  retention  and  provides  rewards to  executives  and other  eligible
employees  commensurate  with growth in  stockholder  value.  The Primary  Stock
Option  Committee  had the sole  responsibility  for making option grants to the
Company's  executive  officers  during 1997. The Primary Stock Option  Committee
also  approved  the  guidelines  for option  grants made to other key  employees
during that fiscal  year.  Based on a review of  competitive  data,  the Primary
Stock Option  Committee  targeted  total option grants for 1997 to fall within a
range of 2.5% - 4.0% of total shares  outstanding.  Actual option grants, net of
cancellations,  for the fiscal year totaled 3.5% of the weighted  average number
of shares issued and  outstanding.  All stock options were granted at the market
price per share on the date of grant and have a maximum term of ten years.

         The Primary Stock Option  Committee has established  guidelines for the
number  of  options  to  be  granted  to  each  level  of   executive   officer,
non-executive  management  and key individual  contributor  based on analysis of
competitive  data and internal  estimates of the number of options  necessary to
attract and retain these employees.  These guidelines were used to determine the
range of options to be granted to each  employee  through the  Company's  annual
grant  program.  The Primary  Stock  Option  Committee  applied its  judgment of
individual  performance,  with some  consideration  for the  number of  unvested
options held by an  individual,  when making  specific  grants to each executive
officer. These options will vest entirely in the fourth year after grant so that
generally the vesting will not overlap with previously granted options. In total
254,550 stock options were granted to twelve (12)  eligible  executive  officers
pursuant to the annual grant program.

         In addition to the annual  grants,  the Primary Stock Option  Committee
granted a special award of 299,582  options to five executive  officers.  In the
Primary Stock Option  Committee's  judgment these executives are critical to the
Company's future  competitive  capability and a special  incentive for continued
service was warranted. The options will become exercisable in a series of annual
installments over either a three or four year period.

         Finally,  the  Primary  Stock  Option  Committee  deemed it in the best
interest  of the  Company  to grant  new  options,  as a  retention  tool,  that
reflected  the lower  price level of the  Company's  stock in the second half of
1997.  Accordingly,  in October 1997 the Primary Stock Option Committee  granted
152,166  options to thirteen (13)  eligible  executive  officers.  Each of these
options  becomes  exercisable  in a series of  installments  during  the  second
through fourth years after grant.


                                       15
<PAGE>


Compensation of the Chief Executive Officer and of the Chairman of the Board

         Stephen  C.  Johnson's  and Tu Chen's  base  salaries  for 1997 were at
approximately  the 40th  percentile of salaries paid to executives in comparable
positions at the peer companies, in accordance with the Compensation Committee's
target.  Due to the  Company's  performance  in 1997,  no merit  increases  were
awarded  for 1998.  As no cash  bonuses  were paid for 1997 under the  Company's
plans, Mr. Johnson and Dr. Chen received  variable  compensation  only under the
Company's  Cash Profit  Sharing Plan pursuant to which a  distribution  was made
based upon the Company's profitability during the first half of the fiscal year.
Mr.  Johnson and Dr. Chen were each  granted  stock  options for 113,810  shares
during  the  year.  They were  among the five  officers  receiving  the  special
continued service awards described above.

Compliance with Internal Revenue Code Section 162(m)

         As a result of Section 162(m) of the Internal  Revenue Code,  which was
enacted into law in 1993,  the Company will not be allowed a Federal  income tax
deduction  for  compensation  paid  to  certain  officers,  to the  extent  that
compensation  exceeds one (1) million  dollars per officer in any one year. This
limitation will be in effect for each fiscal year of the Company beginning after
December  31,  1993  and  will  apply to all  compensation  paid to the  covered
executive officers which is not considered to be performance based. Compensation
which does qualify as  performance-based  compensation will not have to be taken
into account for purposes of this  limitation.  At the 1994 Annual Meeting,  the
Company obtained  stockholder  approval for certain  amendments to the Company's
Stock  Option Plan which were  designed to assure that any  compensation  deemed
paid in connection  with the exercise of stock options  granted under that plan,
with an exercise  price equal to the market  price of Common  Stock on the grant
date,  will  qualify  as  performance-based  compensation.  The  Bonus  Plan was
restructured  in 1996 and approved by  stockholders  so that the  payments  made
under that plan  would also  qualify  as  performance-based  compensation  under
Section  162(m) and the  Company  obtained a ruling  from the  Internal  Revenue
Service that the payments under the Bonus Plan will qualify as performance-based
compensation.  An  amendment  to the Bonus  Plan was  subsequently  approved  by
stockholders in 1997, and future payments  thereunder should continue to qualify
as performance-based compensation which would not be subject to the Code Section
162(m) limitation on deductibility.


                      MEMBERS OF THE COMPENSATION COMMITTEE

Craig R. Barrett   Irwin Federman    Max Palevsky    Masayoshi Takebayashi


                  MEMBERS OF THE PRIMARY STOCK OPTION COMMITTEE

Craig R. Barrett   Irwin Federman    Max Palevsky


         The members of the Compensation  Committee and the Primary Stock Option
Committee of the Company's  Board of Directors are as named in the above report.
No member of either committee was at any time during the 1997 fiscal year, or at
any other time, an officer or employee of the Company.

         No executive officer of the Company served on the board of directors or
compensation  committee  of any  entity  which has one or more of its  executive
officers  serving  as  a  member  of  the  Company's  Board  of  Directors,  the
Compensation Committee, or the Primary Stock Option Committee.  Mr. Takebayashi,
a member of the Company's  Board of Directors,  is an executive  officer of Kobe
Precision,  Inc. a wholly-owned subsidiary of Kobe Steel, Ltd. ("Kobe") and is a
member of the Board of Komag Material Technology,  Incorporated, a joint venture
of the Company and Kobe. For further information  concerning this joint venture,
see the section below entitled Certain Relationships and Related Transactions.


                                       16
<PAGE>


Stock Performance Graph
<TABLE>
         The following  graph shows a five year  comparison of cumulative  total
return on common stock for the Company,  the S&P 500  Composite  Index,  and the
Computer  Manufacturing  Index from December 31, 1992 through December 31, 1997.
The past  performance  of the Company's  Common Stock is no indication of future
performance.

[The following  descriptive  data is supplied in accordance  with Rule 304(d) of
Regulation S-T]

<CAPTION>
    ------------------------- -------------- -------------- -------------- -------------- ------------- -------------
    Prices   indexed  to  an
    initial   investment  of
    $100                        12/31/92       12/31/93       12/30/94       12/29/95       12/27/96      12/26/97
<S>                              <C>            <C>            <C>            <C>           <C>           <C>
    ------------------------- -------------- -------------- -------------- -------------- ------------- -------------
    Komag, Incorporated          $100.00        $101.43        $149.29        $263.57       $307.14       $163.57
    ------------------------- -------------- -------------- -------------- -------------- ------------- -------------
    Nasdaq Composite             $100.00        $114.80        $112.21        $158.70       $195.43       $230.56
    ------------------------- -------------- -------------- -------------- -------------- ------------- -------------
    Nasdaq Computer Mfg.         $100.00         $94.77        $104.08        $163.93       $226.88       $253.33
    ------------------------- -------------- -------------- -------------- -------------- ------------- -------------
</TABLE>

         The chart above  assumes $100  invested on December 31, 1992, in Komag,
Incorporated  Common Stock,  S&P 500 Composite Index and Computer  Manufacturing
Index,  and the  reinvestment  of dividends  (although  dividends  have not been
declared on the Company's Common Stock).  Historical returns are not necessarily
indicative  of future  performance.  The graph was plotted  using the  following
data:


                                       17
<PAGE>

Summary of Cash and Certain Other Compensation

<TABLE>
         The following table sets forth the compensation earned by the Company's
Chief  Executive  Officer  and each of the  Company's  four  other  highest-paid
executive  officers  whose base salary and bonus for the 1997 fiscal year was in
excess of $100,000 (the "Named Executive Officers") for services rendered in all
capacities  to the  Company  and its  subsidiaries  for the 1997,  1996 and 1995
fiscal years.  No executive  officer who would have  otherwise  been included in
such table on the basis of salary  and bonus  earned  for the 1997  fiscal  year
resigned or terminated employment during that fiscal year.

I.                                 SUMMARY COMPENSATION TABLE
- ------------------------------------------------------------------------------------------------------------
<CAPTION>
                                                                                Long Term
                                             Annual Compensation                  Awards
             Name and                        -------------------                Securities      All Other
            Principal                                                           Underlying       Compen-
             Position                Year        Salary           Bonus       Option Granted      sation
             --------                ----        ------           -----       --------------      ------
                                                 ($)(1)          ($)(2)            (#)            ($)(3)
<S>                                  <C>        <C>            <C>                <C>             <C>
  Stephen C. Johnson                 1997       $428,000          $10,621         113,810          $9,067
  President and                      1996       $402,000          $66,949          43,500         $29,744
  Chief Executive Officer            1995       $387,000       $1,049,619          58,000         $39,567

  Tu Chen                            1997       $428,000          $10,621         113,810          $9,067
  Chairman of the Board              1996       $402,000          $66,949          43,500         $29,744
                                     1995       $387,000       $1,049,619          58,000         $39,514

  Christopher H. Bajorek             1997       $316,654           $7,966         160,825          $6,956
  Senior Vice President and          1996       $150,000          $30,000         110,000            --
  Chief Technical Officer            1995            --             --              --               --

  Willard Kauffman                   1997       $305,244           $7,643          27,285          $6,700
  Senior Vice President and          1996       $289,000          $78,147          25,500         $21,559
  Chief Operating Officer            1995       $278,000         $395,699          30,600         $28,609

  Fred  J. Wiele                     1997       $249,995           $6,204          32,528          $5,556
  Senior Vice President              1996       $125,000          $10,000          80,000            --
  Marketing and Sales                1995            --             --              --               --

- ------------------------------------------------------------------------------------------------------------
<FN>
(1)      Includes  salary  deferred under the Komag Savings and Deferred  Profit
         Sharing  Plan and the  Company's  Non-Qualified  Deferred  Compensation
         Plan.


                                       18
<PAGE>

(2)      Includes amounts earned for the indicated year under the Company's Cash
         Profit Sharing Plan, the  Management  Bonus Plan and the  Discretionary
         Bonus  Plan.  Amount  earned  under the Cash  Profit  Sharing  Plan are
         accrued  during  a given  year  and are  paid in July of that  year and
         January or February of the  following  year.  Bonuses  earned under the
         Management  Bonus  Plan are  accrued  during  a given  year and paid in
         January  or  February  of  the  following   year.   Bonuses  under  the
         Discretionary Bonus Plan are awarded by the Compensation  Committee for
         a  particular  fiscal  year  solely  on the  basis of such  Committee's
         competitive compensation analysis for that year and are paid in January
         or February of the following  year.  For the 1997 fiscal year, the only
         bonuses paid were under the Cash Profit Sharing Plan.

(3)      Includes  for the  fiscal  years  indicated  below:  (i)  the  matching
         contributions  ($0.25 match per $1.00 individual  contribution) made by
         the  Company on behalf of each Named  Executive  Officer to the Section
         401(k)  Savings  Program,  up to a  maximum  match of $625 and (ii) the
         semi-annual profit sharing  contributions made by the Company on behalf
         of  each  Named   Executive   Officer  to  the  Savings  and   Deferred
         Profit-Sharing Plan and Deferred Compensation Plan:

          ----------------------------------------------------------------------
                                                 Matching        Profit Sharing
                                               Contribution       Contribution
                                               ------------       ------------

          Stephen C. Johnson           1997        $625             $ 8,442
                                       1996        $625             $29,119
                                       1995        $237             $39,330


          Tu Chen                      1997        $625              $8,442
                                       1996        $625             $29,119
                                       1995        $184             $39,330


          Christopher H. Bajorek       1997        $625              $6,331
                                       1996         --                 --
                                       1995         --                 --


          Willard Kauffman             1997        $625              $6,075
                                       1996        $625             $20,934
                                       1995        $312             $28,297


          Fred J. Wiele                1997        $625              $4,931
                                       1996         --                 --
                                       1995         --                 --
          ----------------------------------------------------------------------
</FN>
</TABLE>


                                       19
<PAGE>


Stock Options
<TABLE>
         The  following  table  provides  information  with respect to the stock
option  grants made for the 1997 fiscal year under the  Company's  Restated 1987
Stock Option Plan to the Named Executive Officers.  Except for the limited stock
appreciation  right described below,  which formed part of the option grant made
to each of the Named  Executive  Officers,  no stock  appreciation  rights  were
granted to such individuals  during the 1997 fiscal year.  Potential  Realizable
Values noted below reflect hypothetical appreciation based on the stock price at
grant date.


II.                                              OPTION GRANTS TABLE
<CAPTION>
- -----------------------------------------------------------------------------------------------------------------------------
                                                                                        Potential Realizable                 
                                                                                          Value at Assumed                   
                                                                                            Annual Rates                     
                                                                                             Stock Price                     
                                                                                             Appreciation                    
                                           Individual Grants                               for Option Term                   
                                           -----------------                               ---------------                   
                        
                                     Number of     % of                                                                      
                                    Securities      Total         Exercise                                                      
                                    Underlying     Options        or Base                                        Valuation    
                                     Options       Granted to      Price                                          per SFAS    
                          Date of    Granted       Employees      ($/Share)  Expiration                              123       
        Name              Grant(1)     (#)       in Fiscal Year      (2)        Date       5%($)(3)   10%($)(3)   pro forma(4)
        ----             ---------     ---       --------------   ---------    ----       --------   ---------   ------------
<S>                      <C>          <C>           <C>            <C>        <C>       <C>         <C>          <C>
Stephen C. Johnson       01/06/97      43,500       1.05%          $26.75     01/06/07    $731,798  $1,854,518     $782,504
                         01/20/97      49,791       1.20%          $28.44     01/20/07    $890,472  $2,256,630     $952,173
                         10/06/97      20,519        .49%          $19.44     10/06/07    $250,827    $635,645     $269,815
                                                                  
Tu Chen                  01/06/97      43,500       1.05%          $26.75     01/06/07    $731,798  $1,854,518     $782,504
                         01/20/97      49,791       1.20%          $28.44     01/20/07    $890,472  $2,256,630     $952,173
                         10/06/97      20,519        .49%          $19.44     10/06/07    $250,827    $635,645     $269,815
                                                                  
Christopher H. Bajorek   01/06/97      25,500        .61%          $26.75     01/06/07    $428,985  $1,087,132     $458,710
                         01/20/97     100,000       2.41%          $28.44     01/20/07  $1,788,419  $4,532,206   $1,912,340
                         10/06/97      35,325        .85%          $19.44     10/06/07    $431,818  $1,094,311     $464,506
                                                                  
                                                                  
Willard  Kauffman        01/06/97      20,400        .49%          $26.75     01/06/07    $343,188    $869,706     $366,968
                         10/06/97       6,885        .16%          $19.44     10/06/07     $84,163    $213,286      $90,535
                                                                  
Fred J. Wiele            01/06/97      17,850        .43%          $26.75     01/06/07    $300,289    $760,992     $321,097
                         10/06/97      14,678        .35%          $19.44     10/06/07    $179,426    $454,700     $193,009
- ----------------------------------------------------------------------------------------------------------------------------
<FN>

  Each  option has a maximum  term of 10 years,  subject to earlier  termination
  upon the optionee's cessation of service.  Each option will become immediately
  exercisable  for all the option shares in the event the Company is acquired by
  a merger or asset  sale  (unless  the option is  assumed  or  replaced  by the
  acquiring  entity) or in the event the  optionee's  employment  terminates  by
  reason of death,  permanent  disability or retirement at or after age 65. Each
  option includes a limited stock  appreciation  right which would result in the
  cancellation of that option upon a take-over of the Company effected through a
  hostile  tender offer for more than 50% of the  Company's  outstanding  Common
  Stock. In return,  the optionee will be entitled to a cash  distribution  from
  the Company per canceled option share equal to the highest reported price paid
  per share of Common Stock in such tender offer, less the option exercise price
  per share.


                                       20
<PAGE>

(1)    The  option  granted  to  each  Named   Executive   Officer  will  become
       exercisable for the option shares in a series of  installments  over such
       individual's  period of  service  with the  Company as  specified  below,
       measured from the grant date.

         Grant Date        Vesting Schedule
         ----------        ----------------


         01/06/97          Vesting and  exercisable  for 8.33% of option  shares
                           upon  completion  of  thirty-seven   (37)  months  of
                           service  following the grant date,  and the remainder
                           vesting  in  eleven  (11)  successive  equal  monthly
                           installments  of 8.33% each upon  completion  of each
                           subsequent  month of service,  becoming  fully vested
                           and  exercisable  forty-eight  (48) months  following
                           grant date.

         01/20/97          Vesting and exercisable at varying  percentages (from
                           10% to 50%) of the option  shares upon  completion of
                           one (1) year of service  following  grant date,  with
                           the remainder in subsequent annual  installments over
                           either a two (2) or three (3) year  period,  becoming
                           fully vested and  exercisable  in no longer than four
                           (4) years following grant date.

         10/06/97          Vesting and exercisable for 25% of option shares upon
                           completion of one (1) year of service following grant
                           date,  and  the  remainder  vesting  in  twelve  (12)
                           successive   equal   quarterly    installments   upon
                           completion  of each  additional  quarter of  service,
                           becoming  fully  vested and  exercisable  forty-eight
                           (48) months after grant date.

(2)      The  exercise  price may be paid in cash,  in  shares of the  Company's
         Common  Stock  valued at fair market  value on the  exercise  date,  or
         through a cashless exercise procedure  involving a same-day sale of the
         purchased shares.

(3)      There is no assurance provided to any executive  officer,  or any other
         holder  of the  Company's  securities,  that  the  actual  stock  price
         appreciation  from the grant date and over the 10 year option term will
         be at the  assumed  5% and 10%  levels or at any other  defined  level.
         Unless the market price of the Common Stock appreciates over the option
         term,  no value will be  realized  from the option  grants  made to the
         executive officers.

(4)      For  purposes  of such pro  forma  disclosure,  the fair  value of each
         option grant is estimated on the date of grant using the  Black-Scholes
         option pricing model with the following assumptions: risk-free interest
         rate of 6.3%;  volatility  factor of the  expected  market price of the
         Company's Common Stock of 61.9%; and a  weighted-average  expected life
         of such options of 6.5 years.  There was no dividend  yield included in
         the  calculation  since  the  Company  does  not  pay  dividends.   The
         weighted-average  fair value of options granted to all employees during
         1997 was $11.06.  For officer grants during 1997, the  weighted-average
         fair value of the options was $17.20.
</FN>
</TABLE>

                                       21
<PAGE>


Option Exercises and Holdings
<TABLE>
         The table  below sets forth  information  concerning  the  exercise  of
options during the 1997 fiscal year and  unexercised  options held as of the end
of such year by the Named Executive Officers.  No stock appreciation rights were
exercised during such fiscal year, and except for the limited stock appreciation
rights described in Footnote (1) to the Option Grant Table above which form part
of each stock option grant, no stock appreciation rights were outstanding at the
end of such fiscal year.

III.                                   OPTION EXERCISES AND YEAR-END VALUE TABLE

               Aggregated Option Exercises in Last Fiscal Year and Fiscal Year End Option Value:
<CAPTION>
- -----------------------------------------------------------------------------------------------------------------
                                                                       Number of
                                                                      Securities
                                                                      Underlying               Value of
                                                                      Unexercised            Unexercised
                                                                        Options              In-The-Money
                                  Shares                               At Fiscal          Options at Fiscal
                                 Acquired             Value           Year-End(#)          Year-End ($)(2)
                                on Exercise        Realized(1)    Exercisable (E)/        Exercisable (E)/
           Name                     (#)                (#)         Unexercisable (U)      Unexercisable (U)
           ----                     ---                ---         -----------------      -----------------
<S>                                <C>                 <C>            <C>                   <C>
   Stephen C. Johnson               --                 --             218,807 E             $1,360,293 E
                                                                      219,143 U               $121,592 U


   Tu Chen                          --                 --             144,347 E               $824,792 E
                                                                      219,143 U               $121,592 U


   Willard Kauffman                 --                 --              84,667 E               $461,077 E
                                                                       86,718 U                $72,260 U


   Christopher H. Bajorek           --                 --              41,250 E                  $0.00 E
                                                                      229,575 U                  $0.00 U


   Fred J. Wiele                    --                 --              30,000 E                  $0.00 E
                                                                       82,528 U                  $0.00 U
- -----------------------------------------------------------------------------------------------------------
<FN>
(1)      Value Realized  equals the market price value of the shares at the time
         of exercise less the exercise price thereof.

(2)      Excess of the closing price per share of the Company's  Common Stock at
         the end of the fiscal year  ($14.3125)  over the option exercise price.
         If the closing price is less than the exercise price, then the value of
         unexercised options equals zero. 
</FN>
</TABLE>

                                       22
<PAGE>

Employment Contracts and Termination of Employment Agreements

         None of the Company's  executive officers have employment  contracts or
severance agreements with the Company.

Officer Loans

         The Company has advanced the sum of $169,079 to Mr.  Bajorek during the
1997  fiscal  year to finance  the cost of his legal fees in  connection  with a
lawsuit brought by his former employer. The advances bear interest at the market
rate required under the federal tax laws. The highest amount  outstanding  under
these  advances  during the 1997 fiscal year was  $176,194,  and as of March 30,
1998, the amount outstanding was $229,939.

Certain Relationships and Related Transactions

         The Company and Kobe Steel USA Holdings  Incorporated  ("Kobe USA") are
joint  investors  in  Komag  Material  Technology,  Inc.  ("KMT").  The  Company
currently owns 80% of KMT and Kobe USA owns the remaining  20%.  Pursuant to the
Company's joint venture agreement with Kobe USA and its parent  corporation Kobe
Steel, Ltd. ("Kobe Steel" and,  collectively  with Kobe USA,  "Kobe"),  Kobe has
agreed to supply substrate blanks to KMT, and the Company has agreed to purchase
KMT's  entire  output of  finished  substrates.  The  Company  made  payments of
approximately  $42,738,000 to KMT in 1997 for the purchase of finished  aluminum
substrates.  These payments were determined  pursuant to a  formula-based  price
whereby  the  prices  paid by the  Company  may be  higher or lower  than  those
available  from  unrelated  third  parties.  In 1997 the Company also  purchased
approximately  $52,308,000 of products from Kobe Steel and its  subsidiaries and
distributors.  The Company  believes that the terms and conditions for the above
payments were as favorable as could be obtained from unrelated third parties.

         Pursuant to the terms of a Common Stock Purchase Agreement between Kobe
USA and the Company  (the "Kobe  Agreement"),  in March 1990 Kobe USA  purchased
2,000,000 shares of the Company's Common Stock for $20,000,000.  Kobe has agreed
to limit its ownership of the Company's  total voting  securities to not greater
than twenty percent (20%),  except that under  circumstances such as a potential
change of control or the emergence of a larger stockholder,  Kobe has a right of
first refusal with respect to the issuance of new securities by the Company, and
is also  entitled to  consideration  as a future  joint  venture  partner of the
Company.  In addition,  the Kobe Agreement generally restricts the right of Kobe
to sell or transfer the shares acquired under the Kobe  Agreement.  Kobe is also
required  to vote its  shares  as  directed  by the  Board of  Directors  of the
Company,  subject  to  certain  exceptions  such  as  upon  the  liquidation  or
disposition of the Company.  Further,  so long as Kobe continues to own at least
2,000,000 shares of the Company's Common Stock, the Kobe Agreement provides that
the Board of Directors of the Company and its Nominating Committee are generally
required to facilitate the election of a designee of Kobe to the Company's Board
of Directors  and to the  Nominating  Committee.  See "Item No.  1--Election  of
Directors" above.

         The Company and Asahi Glass Co.,  Ltd.  ("Asahi"),  a former  holder of
greater  than 5% of the  Company's  stock,  also  entered  into a  Common  Stock
Purchase  Agreement (the "Asahi Agreement") for the purchase of 2,000,000 shares
of the  Company's  Common  Stock for  $20,000,000  in January,  1989.  The Asahi
Agreement was amended in March, 1990 to conform substantially with the terms and
conditions  of  the  Kobe  Agreement  above.  In  1997,  the  Company  purchased
approximately  $17,836,000  worth of equipment from Asahi.  The Company believes
that the terms and  conditions of these  purchases were as favorable as could be
obtained from unrelated third parties.


                                       23
<PAGE>

         In 1997,  the Company  recorded sales of  approximately  $95,302,000 to
Asahi Komag Co., Ltd.  ("AKCL"),  a joint venture  between the Company and Asahi
that manufacturers thin-film media in Japan, and made purchases of approximately
$14,686,000  from AKCL.  The Company  believes that the terms and  conditions of
these  purchases  were as favorable as could be obtained  from  unrelated  third
parties.

         In September 1994, the Company  announced its  participation in Headway
Technologies,  Inc. ("Headway"),  a new company formed to research,  develop and
manufacture  advanced   magnetoresistive  ("MR")  heads  for  the  data  storage
industry.  Hewlett-Packard  Company  ("HP") and AKCL  provided  the initial cash
funding to Headway in exchange for equity interests. The Company and Asahi Glass
America,  Incorporated,  a wholly-owned subsidiary of Asahi, licensed to Headway
MR technology and contributed  research and production equipment in exchange for
equity.  In 1997,  AKCL, Asahi Glass America,  Incorporated,  HP and the Company
sold  their  equity  interests  in  Headway  to a  group  of new  investors  for
$21,990,000. The Company retains no remaining interest in Headway.


Compliance with Section 16(a) Beneficial Ownership Reporting

         Section  16(a) of the  Securities  Exchange  Act of 1934  requires  the
Company's  directors and executive  officers,  and persons who own more than ten
percent of a registered class of the Company's equity  securities,  to file with
the Commission  initial reports of ownership and reports of changes in ownership
of common stock and other equity securities of the Company. Officers,  directors
and greater than ten percent stockholders are required by Commission regulations
to furnish the Company with copies of all Section 16(a) forms they file.

         To the Company's  knowledge,  based solely upon written  review of such
reports  furnished  to the  Company and  written  representations  that no other
reports were  required,  during the fiscal year ended  December  28,  1997,  all
Section  16(a)  filing  requirements   applicable  to  the  Company's  officers,
directors and greater than ten percent stockholders were met in a timely manner.


                                       24
<PAGE>



                                 OTHER BUSINESS

         The  Board  of  Directors  knows  of no  other  business  that  will be
presented for consideration at the Annual Meeting. If other matters are properly
brought before the Annual Meeting,  however,  it is the intention of the persons
named in the accompanying proxy to vote the shares  represented  thereby on such
matters in accordance with their best judgment.


                              STOCKHOLDER PROPOSALS

         Proposals  of  stockholders  that are  intended to be  presented at the
Company's  Annual Meeting of Stockholders to be held in 1999 must be received by
the Company no later than December 31, 1998 in order to be included in the proxy
statement and proxy relating to that meeting.

                                           By Order of the Board of Directors



                                           TU CHEN
                                           Chairman of the Board



                                       25
<PAGE>

                              KOMAG, INCORPORATED

         The  Annual  meeting  of  Stockholders  will be held at 10;00  a.m.  on
Wednesday, May 27,1998, at Komag, Incorporated, Building 9, located at:

                                             1705 Automation Parkway
                                             San Jose, California 95131



                         [ Direction Map Graphic Omitted ]

<PAGE>
                              KOMAG, INCORPORATED

                        1988 EMPLOYEE STOCK PURCHASE PLAN

              (Restated June 29, 1992 and Amended January 27, 1994,
                     January 22, 1997 and January 30, 1998)


       I.         PURPOSE

                  The Komag, Incorporated 1988 Employee Stock Purchase Plan (the
"Plan") is intended to provide eligible employees of the Company and one or more
of its  Corporate  Affiliates  with the  opportunity  to  acquire a  proprietary
interest in the Company through  participation  in a plan designed to qualify as
an employee stock  purchase plan under Section 423 of the Internal  Revenue Code
(the "Code").

      II.         DEFINITIONS

                  For  purposes of  administration  of the Plan,  the  following
terms shall have the meanings indicated:

                  Base Compensation  means (i) the regular base earnings paid to
a Participant by one or more Participating  Companies,  before deduction for any
contributions  made on the Participant's  behalf to any Code Section 401(k) Plan
maintained by the Company or any Corporate  Affiliate.  The  calculation of Base
Compensation  may also  include,  at the  discretion  of the Plan  Administrator
exercisable  prior to the start of any purchase period,  bonuses,  overtime pay,
shift  differentials  and  other  differentials.   Base  Compensation  shall  be
calculated on the basis of  equivalent  bi-weekly  straight-time  hours (up to a
maximum of 79.50 hours for  three-day  shift  employees  and 80.00 hours for all
other  employees)  multiplied  by  straight-time  rate.  In no event  shall Base
Compensation   include  any   profit-sharing   or  other   non-salary   deferral
contributions  made  on the  Participant's  behalf  pursuant  to  any  qualified
profit-sharing plan under Code Section 401(a).

                  Board means the Board of Directors of the Company.

                  Company means Komag, Incorporated, a Delaware corporation, and
any  corporate  successor  to all or  substantially  all of the assets or voting
stock of Komag, Incorporated, which shall by appropriate action adopt the Plan.

                  Corporate  Affiliate  means any  company  which is either  the
parent corporation or a subsidiary  corporation of the Company (as determined in
accordance  with Section 424 of the Code),  including  any parent or  subsidiary
corporation which becomes such after the Effective Date.

                  Effective   Date  means,   with   respect  to  the  1992  plan
restatement,  June 29, 1992.  However,  should any Corporate  Affiliate become a
Participating  Company in the Plan after such applicable  date, then such entity
shall   designate   a   separate    Effective   Date   with   respect   to   its


<PAGE>

employee-Participants.

                  Employee  means any person  who is  regularly  engaged,  for a
period of more than 20 hours per week for more than 5 months per calendar  year,
in the rendition of personal services to the Company or any other  Participating
Company for earnings considered wages under Section 3121(a) of the Code.

                  Fiscal Quarter means a three-month  period  corresponding to a
fiscal  quarter of the Company,  based on the  Company's  52-53 week fiscal year
ending on the Sunday closest to December 31st of each year.

                  Participant  means any  Employee  of a  Participating  Company
actively participating in the Plan.

                  Participating  Company  means the Company  and such  Corporate
Affiliate or Affiliates as may be designated from time to time by the Board. The
Participating  Companies in the Plan,  as of the Effective  Date,  are listed in
attached Schedule A.

                  Stock means shares of the common stock of the Company.

     III.         ADMINISTRATION

                  (a)  The  Plan  shall  be  administered  by a  committee  (the
"Committee")  comprised  of at  least  two  non-employee  members  of the  Board
appointed  from time to time by the Board.  The Committee as Plan  Administrator
shall  have full  authority  to  administer  the Plan,  including  authority  to
interpret  and  construe  any  provision of the Plan and to adopt such rules and
regulations  for  administering  the Plan as it may deem  necessary  in order to
comply  with  the  requirements  of Code  Section  423.  Decisions  of the  Plan
Administrator  shall be final and binding on all parties who have an interest in
the Plan.

                  (b) No member of the Committee  while serving as such shall be
eligible to participate in the Plan.

      IV.         PURCHASE PERIODS

                  (a) Stock shall be offered for purchase under the Plan through
a series of  successive  purchase  periods  until  such time as (i) the  maximum
number of shares of Stock  available for issuance under the Plan shall have been
purchased or (ii) the Plan shall have been sooner  terminated in accordance with
Article X or Article XI.

                  (b) The Plan shall be implemented in a series of successive or
overlapping  purchase periods,  each of such duration (not to exceed twenty-four
(24) months) as determined by the Plan Administrator  prior to the start date of
the purchase period.  Purchase  periods will start, at the Plan  Administrator's
discretion,  either  on the first  day or the  first  Monday of each  successive


                                       2.
<PAGE>

Fiscal Quarter or each alternate successive Fiscal Quarter. Accordingly,  either
four (4) or two (2) separate purchase periods may commence per Fiscal Year.

                  (c) The Participant shall be granted a separate purchase right
for each purchase period in which he/she participates.  The purchase right shall
be granted on the first day of the  purchase  period and shall be  automatically
exercised  in (i)  successive  quarterly  installments  on the  last day of each
Fiscal  Quarter  such  purchase  right  remains  outstanding,  in the  case of a
purchase  period in which purchases are effected  quarterly,  or (ii) successive
semi-annual  installments on the last day of each alternate  Fiscal Quarter such
purchase right remains  outstanding,  in the case of a purchase  period in which
purchases are effected semi-annually.

                  (d) An Employee may participate in only one purchase period at
a time.  Accordingly,  an Employee who wishes to join a new purchase period must
withdraw from the current purchase period in which he/she is  participating  and
must also enroll in the new purchase period prior to the  commencement  date for
that period.

                  (e) The acquisition of Stock through participation in the Plan
for any purchase period shall neither limit nor require the acquisition of Stock
by the Participant in any subsequent purchase period.  However,  the acquisition
of Stock  through  participation  in the Plan for any  purchase  period shall be
counted toward the  limitations on the number of purchasable  shares as provided
in Section VII(b) and the accrual limitations as provided in Section VIII.

                  (f) Under no  circumstances  shall any purchase rights granted
under the Plan be exercised,  nor shall any shares of Stock be issued hereunder,
until  such time as (i) the Plan  shall  have  been  approved  by the  Company's
shareholders  and (ii) the  Company  shall  have  complied  with all  applicable
requirements of the Securities Act of 1933 (as amended),  all applicable listing
requirements  of any  securities  exchange  on which the Stock is listed and all
other applicable requirements established by law or regulation.

       V.         ELIGIBILITY AND PARTICIPATION

                  (a)  Every  Employee  of  a  Participating  Company  shall  be
eligible  to  participate  in the Plan on the first  day of the  first  purchase
period following the Employee's  commencement of service with the Company or any
Corporate Affiliate,  but in no event shall participation  commence prior to the
Effective Date.

                  (b) In order  to  participate  in the  Plan  for a  particular
purchase  period,  the Employee must complete the enrollment forms prescribed by
the Plan  Administrator  (including a purchase agreement and a payroll deduction
authorization)  and  file  such  forms  with  the  Plan  Administrator  (or  its
designate)  prior  to  the  commencement  date  of  the  purchase  period.  Such
enrollment  shall be effective for  subsequent,  but not  overlapping,  purchase
periods,  unless the Employee notifies the Plan Administrator (or its designate)
to the contrary prior to the commencement  date of any such subsequent  purchase
period.


                                       3.
<PAGE>

                  (c) The payroll  deduction  authorized  by a  Participant  for
purposes of acquiring Stock under the Plan may be any multiple of 1% of the Base
Compensation paid to the Participant  during the relevant purchase period, up to
a maximum of 10%. The deduction rate so authorized  shall continue in effect for
the entire purchase period and for each subsequent  purchase period,  unless the
Participant  shall,  prior  to the end of the  purchase  period  for  which  the
purchase right is in effect, reduce the rate by filing the appropriate form with
the Plan  Administrator  (or its  designate).  The  reduced  rate  shall  become
effective  as soon as  practicable  following  the  filing  of such  form.  Each
Participant shall be permitted such a rate reduction only four (4) times in each
purchase  period.  The  reduced  rate  shall  continue  in effect for the entire
purchase period and for each subsequent purchase period,  unless the Participant
shall,  prior to the commencement of any subsequent  purchase period designate a
different rate (up to the 10% maximum) by filing the  appropriate  form with the
Plan  Administrator (or its designate).  The new rate shall become effective for
the first  purchase  period  commencing  after the filing of such form.  Payroll
deductions,  however,  will  automatically  cease  upon the  termination  of the
Participant's purchase right in accordance with Section VII(d) or (e) below.

      VI.         STOCK SUBJECT TO PLAN

                  (a) The  Stock  purchasable  by  Participants  under  the Plan
shall,  solely  in  the  Board's  discretion,  be  made  available  from  either
authorized  but unissued Stock or from  reacquired  Stock,  including  shares of
Stock  purchased on the open  market.  The total number of shares of Stock which
may be issued  under the Plan  shall not exceed  4,850,000  shares  (subject  to
adjustment under Section VI(b)). Such share reserve includes the 1,300,000-share
increase  authorized  by the Board on January 30, 1998,  subject to  stockholder
approval at the 1998 Annual Meeting.

                  (b) In the event any  change is made to the Stock  purchasable
under the Plan by reason of any recapitalization,  stock dividend,  stock split,
combination of shares or other change affecting the outstanding  common stock of
the  Company as a class  without  receipt  of  consideration,  then  appropriate
adjustments  shall be made by the Plan  Administrator  to the class and  maximum
number of shares  purchasable  under the Plan,  the class and maximum  number of
shares  purchasable per Participant  under any purchase right outstanding at the
time or purchasable per Participant over the term of the Plan, and the class and
number of shares  and the price per share of the Stock  subject  to  outstanding
purchase rights held by Participants under the Plan.

     VII.         PURCHASE RIGHTS

                  An  Employee  who  participates  in the Plan for a  particular
purchase  period shall have the right to purchase  Stock on the  purchase  dates
designated by the Plan Administrator for such purchase period upon the terms and
conditions set forth below and shall execute a purchase agreement embodying such
terms and conditions and such other provisions (not  inconsistent with the Plan)
as the Plan Administrator may deem advisable.

                  (a) Purchase Price.  The purchase price per share shall be the
lesser  of (i) 85% of the fair  market  value of a share of Stock on the date on
which the  purchase  right is granted or (ii)


                                       4.
<PAGE>

85% of the fair market value of a share of Stock on the date the purchase  right
is exercised.  For purposes of  determining  such fair market value (and for all
other  valuation  purposes  under the Plan),  the fair market value per share of
Stock  on any  date  shall  be  determined  in  accordance  with  the  following
provisions:

                                 (i) If the  Stock is not at the time  listed or
                  admitted to trading on any stock exchange but is traded on the
                  Nasdaq National Market,  the fair market value per share shall
                  be the closing selling price per share of Stock on the date in
                  question,   as  such  prices  are  reported  by  the  National
                  Association  of  Securities  Dealers  on the  Nasdaq  National
                  Market.  If there is no reported  closing selling price on the
                  date  in  question,  then  the  closing  selling  on the  last
                  preceding  date  for  which  such  quotation  exists  shall be
                  determinative of fair market value.

                                (ii)  If the  Stock  is at the  time  listed  or
                  admitted  to  trading  on any  stock  exchange,  then the fair
                  market value shall be the closing  selling  price per share of
                  Stock on the date in question on the stock exchange determined
                  by the Plan  Administrator  to be the  primary  market for the
                  Stock, as such price is officially quoted on such exchange. If
                  there is no  reported  sale of Stock on such  exchange  on the
                  date in  question,  then the fair  market  value  shall be the
                  closing  selling  price on the exchange on the last  preceding
                  date for which such quotation exists.

                  (b)  Number  of  Purchasable  Shares.  The  number  of  shares
purchasable by a Participant on any particular purchase date shall be the number
of whole shares  obtained by dividing the amount  collected from the Participant
through payroll  deductions during the quarterly or semi-annual period beginning
with the start of the purchase  period or the most recent  purchase  date in the
same purchase period (whichever is applicable), together with any amount carried
over from the preceding  purchase date in the same purchase  period  pursuant to
the  provisions  of Section  VII(f),  by the  purchase  price in effect for such
purchase  date.  However,  the  maximum  number  of  shares  purchasable  by the
Participant on any purchase date shall not exceed 3,000 shares, in the case of a
purchase period in which purchases are effected  quarterly,  or 6,000 shares, in
the case of a purchase  period in which  purchases  are  effected  semi-annually
(subject in either instance to adjustment under Section VI(b)). In addition, the
maximum  number of shares  for which  purchase  rights may in the  aggregate  be
granted to any individual who is subject to the short-swing profit  restrictions
of the  Federal  securities  laws shall not exceed  50,000  shares  (subject  to
adjustment under Section VI(b)) over the term of the Plan. Accordingly,  no such
officer  or  director  shall be  eligible  to  receive  purchase  rights for any
purchase  period if the number of shares which would otherwise be purchasable by
such  individual  for that purchase  period would result in the issuance to such
individual  of  shares  of Stock in  excess  of the  maximum  number  of  shares
purchasable in the aggregate by such  individual over the term of the Plan. Each
of the foregoing  share-limitations has been adjusted to reflect the two-for-one
forward split of the Stock effected on December 21, 1995.


                                       5.
<PAGE>

                  Under no circumstances  shall purchase rights be granted under
the Plan to any Employee if such Employee  would,  immediately  after the grant,
own  (within  the meaning of Section  424(d) of the Code),  or hold  outstanding
options or other rights to purchase,  stock  possessing  5% or more of the total
combined  voting power or value of all classes of stock of the Company or any of
its Corporate Affiliates.

                  (c) Payment.  Payment for Stock purchased under the Plan shall
be effected by means of the Participant's  authorized payroll  deductions.  Such
deductions  shall  begin on the first  pay day  coincident  with or  immediately
following  the  commencement  date of the  relevant  purchase  period  and shall
terminate with the pay day ending with or  immediately  prior to the last day of
the  purchase  period.  The  amounts  so  collected  shall  be  credited  to the
Participant's  individual  account under the Plan, but no interest shall be paid
on the  balance  from  time to time  outstanding  in the  account.  The  amounts
collected  from a Participant  may be commingled  with the general assets of the
Company and may be used for general corporate purposes.

                  (d) Termination of Purchase Rights.

                        (i) A  Participant  may,  prior  to any  purchase  date,
terminate  his/her  outstanding  purchase  right  under the Plan by  filing  the
prescribed notification form with the Plan Administrator (or its designate). The
Company will then refund all sums previously  collected from the Participant and
not previously  applied to the purchase of Stock during the purchase period, and
no further  amounts will be collected from the  Participant  with respect to the
terminated purchase right.

                        (ii) The termination  shall be irrevocable  with respect
to the  particular  purchase  period to which it pertains and shall also require
the  Participant  to re-enroll  in the Plan (by making a timely  filing of a new
purchase  agreement  and payroll  deduction  authorization)  if the  Participant
wishes to resume participation in a subsequent purchase period.

                  (e)  Termination  of  Employment.   If  a  Participant  ceases
Employee status during any purchase period,  then the Participant's  outstanding
purchase  right  under  the  Plan  shall  immediately  terminate  and  all  sums
previously  collected from the  Participant  and not  previously  applied to the
purchase  of stock  during such  purchase  period  shall be  promptly  refunded.
However,  should the  Participant  die or become  permanently  disabled while in
Employee  status,  then the  Participant  or the  person or  persons to whom the
rights of the deceased  Participant under the Plan are transferred by will or by
the laws of descent and distribution  (the  "successor") will have the election,
exercisable  at any  time  prior  to the  purchase  date  for the  quarterly  or
semi-annual  period  in  which  the  Participant  dies  or  becomes  permanently
disabled,  to (i) withdraw all the funds in the Participant's payroll account at
the time of his/her cessation of Employee status or (ii) have such funds applied
to the  purchase  of shares  of Stock on the next  purchase  date.  In no event,
however,  shall any further  payroll  deductions  be added to the  Participant's
account following his/her cessation of Employee status.


                                       6.
<PAGE>

                  For  purposes  of  the  Plan:  (a)  a  Participant   shall  be
considered  to be an  Employee  for so long as such  Participant  remains in the
employ of the Company or any other Participating  Company under the Plan and (b)
a Participant shall be deemed to be permanently disabled if he/she is unable, by
reason of any medically  determinable  physical or mental impairment expected to
result in death or to be of continuous  duration of at least twelve (12) months,
to engage in any substantial gainful employment.

                  (f)  Stock  Purchase.  Outstanding  purchase  rights  shall be
automatically  exercised in a series of successive  installments  as provided in
Section IV(c). The exercise shall be effected by applying the amount credited to
the Participant's account on the last date of the Fiscal Quarter, in the case of
a purchase period in which purchases are effected quarterly, or the last date of
the  alternate  Fiscal  Quarter,  in the  case of a  purchase  period  in  which
purchases are effected  semi-annually,  to the purchase of whole shares of Stock
(subject to the  limitations  on the maximum  number of  purchasable  shares set
forth in Section VII(b)) at the purchase price in effect for such purchase date.
Any amount remaining in the  Participant's  account after such purchase shall be
held for the  purchase of Stock on the next  quarterly or  semi-annual  purchase
date within the purchase period; provided,  however, that any amount not applied
to the  purchase  of Stock at the end of a  purchase  period  shall be  refunded
promptly after the close of the purchase  period,  and any amount not applied to
the purchase of stock by reason of the Section VII(b) limitations on the maximum
number of purchasable  shares shall be refunded  promptly after the quarterly or
semi-annual purchase date.

                  (g) Proration of Purchase  Rights.  Should the total number of
shares of Stock  which are to be  purchased  pursuant  to  outstanding  purchase
rights on any  particular  date exceed the number of shares then  available  for
issuance under the Plan, the Plan Administrator shall make a pro-rata allocation
of the  available  shares  on a uniform  and  nondiscriminatory  basis,  and any
amounts  credited  to the  accounts  of  Participants  shall,  to the extent not
applied to the purchase of Stock, be refunded to the Participants.

                  (h) Rights as Shareholder.  A Participant shall have no rights
as a shareholder  with respect to shares covered by the purchase  rights granted
to the Participant under the Plan until the shares are actually purchased on the
Participant's  behalf in accordance with Section VII(f). No adjustments shall be
made for dividends,  distributions  or other rights for which the record date is
prior to the date of such purchase.

                  A  Participant  shall  be  entitled  to  receive,  as  soon as
practicable after the date of each purchase,  stock  certificates for the number
of shares purchased on the Participant's  behalf. Such certificate may, upon the
Participant's  request,  be issued in the names of the  Participant  and his/her
spouse as community property or as joint tenants with right of survivorship.

                  In lieu of delivering a stock certificate to each Participant,
the Plan  Administrator  may, in its discretion,  implement a designated  broker
program and direct the Company to issue a single stock  certificate  to a broker
designated by the Plan Administrator.  Such designated broker shall establish an
account for each  Participant  in the Plan and shall effect  transfers and sales
from


                                       7.
<PAGE>

such account at the direction of the  Participant.  To facilitate the designated
broker  program,   the  Plan  Administrator  may  require,  as  a  condition  to
participation  in the Plan,  that a Participant  agree to the issuance of his or
her stock certificates directly to the designated broker.

                  (i)  Assignability.  No purchase rights granted under the Plan
shall be assignable or  transferable  by a Participant  except by will or by the
laws of descent and  distribution,  and the purchase  rights  shall,  during the
lifetime of the Participant, be exercisable only by such Participant.

                  (j) Merger or Liquidation of Company. In the event the Company
or its  shareholders  enter into an agreement to dispose of all or substantially
all of the  assets or  outstanding  capital  stock of the  Company by means of a
sale,  merger or  reorganization  in which the Company will not be the surviving
corporation (other than a reorganization  effected primarily to change the State
in which the Company is incorporated) or in the event the Company is liquidated,
then all  outstanding  purchase  rights  under the Plan shall  automatically  be
exercised immediately prior to such sale, merger,  reorganization or liquidation
by applying all sums previously  collected from  Participants  pursuant to their
payroll  deductions in effect for such rights to the purchase of whole shares of
Common Stock, subject, however, to the applicable limitations of Section VII(b).

    VIII.         ACCRUAL LIMITATIONS

                  (a) No  Participant  shall be  entitled  to  accrue  rights to
acquire  Stock  pursuant  to any  purchase  right  under this Plan if and to the
extent such accrual,  when  aggregated with (I) Stock rights accrued under other
purchase  rights  outstanding  under this Plan and (II) similar  rights  accrued
under other  employee stock purchase plans (within the meaning of Section 423 of
the Code) of the Company or its Corporate  Affiliates,  would  otherwise  permit
such  Participant to purchase more than $25,000 worth of stock of the Company or
any  Corporate  Affiliate  (determined  on the basis of the fair market value of
such stock on the date or dates such rights are granted to the  Participant) for
each calendar year such rights are at any time outstanding.

                  (b) For  purposes  of  applying  the  accrual  limitations  of
Section  VIII(a),   the  right  to  acquire  Stock  under  each  purchase  right
outstanding under the restated Plan shall accrue as follows:

                          - The right to acquire  Stock under each such purchase
         right shall accrue in a series of successive  quarterly or  semi-annual
         installments  as and when the purchase right first becomes  exercisable
         for each installment as provided in Section IV(c).

                          - No right to  acquire  Stock  under  any  outstanding
         purchase right shall accrue to the extent the  Participant  has already
         accrued in the same calendar year the right to acquire Stock under that
         purchase right or any other purchase  rights held by the Participant at
         the rate of $25,000  worth of Stock  (based on the fair market value on
         the date or dates of grant) for each calendar year (or portion thereof)
         for which such purchase rights have been outstanding.


                                      8.
<PAGE>

                          - If by reason of the Section VIII(a) limitations, the
         Participant's   outstanding  purchase  right  does  not  accrue  for  a
         particular  purchase  date of any  purchase  period,  then the  payroll
         deductions   which  the  Participant  made  during  that  quarterly  or
         semi-annual  period  with  respect  to such  purchase  right  shall  be
         promptly refunded.

                  (c) In the event there is any conflict  between the provisions
of this Article VIII and one or more  provisions  of the Plan or any  instrument
issued thereunder, the provisions of this Article VIII shall be controlling.

      IX.         STATUS OF PLAN UNDER FEDERAL TAX LAWS

                  (a) The Plan is  designed  to  qualify  as an  employee  stock
purchase plan under Code Section 423. However,  the Plan  Administrator  may, at
any time in its discretion, cease to administer the Plan as a qualified employee
stock  purchase  plan under  Code  Section  423.  Accordingly,  share  purchases
effected under the Plan at any time after the Plan ceases to be  administered as
a  qualified  employee  stock  purchase  plan under Code  Section  423  (whether
pursuant  to  purchase  rights  granted  before or after  the Plan  ceases to be
qualified)  shall  result in  taxable  income to each  Participant  equal to the
excess of (i) the fair market value of the purchased shares on the purchase date
over (ii) the purchase price paid for such shares.

                  (b) To the extent required by law, the Company's obligation to
deliver shares to the Participant upon the exercise of any outstanding  purchase
right  shall be  subject to the  Participant's  satisfaction  of all  applicable
federal, state and local income and employment tax withholding requirements.

       X.         AMENDMENT AND TERMINATION

                  (a) The Board may from time to time alter,  amend,  suspend or
discontinue  the Plan;  provided,  however,  that no such  action  shall  become
effective prior to the exercise of outstanding purchase rights at the end of the
quarterly  or  semi-annual  period  in which  such  action  is  authorized;  and
provided, further, that no such action of the Board may, without the approval of
the  shareholders  of the Company,  increase the number of shares issuable under
the Plan or the maximum number of shares which any one  Participant may purchase
during a single  purchase  period  or over  the  term of the  Plan  (except  for
adjustments  permitted under Section VI(b)), alter the purchase price formula so
as to reduce the  purchase  price  specified in the Plan,  otherwise  materially
increase  the benefits  accruing to  Participants  under the Plan or  materially
modify the requirements for eligibility to participate in the Plan.

                  (b) The Company shall have the right,  exercisable in the sole
discretion  of  the  Plan  Administrator,  to  terminate  the  Plan  immediately
following  the end of a  quarterly  or  semi-annual  purchase  date.  Should the
Company  elect to exercise  such  right,  then the Plan shall  terminate  in its
entirety,  and no further  purchase rights shall  thereafter be granted,  and no
further


                                       9.
<PAGE>

payroll deductions shall thereafter be collected, under the Plan.

      XI.         GENERAL PROVISIONS

                  (a) The Plan was initially adopted by the Board on January 21,
1988 and approved by the  stockholders  on June 7, 1988.  In January  1991,  the
Board approved a 250,000-share  increase in the number of shares of Common Stock
issuable  under the Plan,  and the  stockholders  approved  such increase in May
1991. The 1992 restatement of the Plan and the  250,000-share  increase approved
by the Board on January 23, 1992 became  effective on the first day of the first
purchase  period  which  began  after  the  1992  Annual  Stockholders  Meeting.
Additional  amendments were made to the Plan on January 27, 1994 and January 22,
1997 to increase the number of shares of Stock  reserved for issuance  under the
Plan,  and the January  1997  amendment  also  extended  the term of the Plan to
December 31, 2001. On January 30, 1998, the Board authorized an amendment to the
Plan to increase the number of shares of Stock available for issuance  hereunder
by an additional  1,300,000 shares,  subject to stockholder approval at the 1998
Annual Meeting. If such stockholder  approval is not obtained,  then no purchase
rights  will  be  granted   under  the  Purchase   Plan  on  the  basis  of  the
1,300,000-share increase.

                  (b) The  provisions  of this restated Plan shall apply only to
purchase  rights  exercised  under the Plan from and after the Effective Date of
such restatement.  All exercises effected under the Plan prior to such Effective
Date were governed by the terms and  conditions of the Plan as in effect on each
such exercise  date, and nothing in this restated Plan shall be deemed to affect
or otherwise  modify the rights or  obligations  of the holders of the shares of
Common Stock acquired thereunder.

                  (c) The Plan shall  terminate upon the earlier of (i) December
31, 2001 or (ii) the date on which all shares  available for issuance  under the
Plan shall have been sold pursuant to purchase rights exercised under the Plan.

                  (d) All costs and expenses  incurred in the  administration of
the Plan shall be paid by the Company.

                  (e)  Neither  the action of the  Company in  establishing  the
Plan,  nor any action  taken under the Plan by the Plan  Administrator,  nor any
provision  of the Plan itself  shall be  construed so as to grant any person the
right to remain in the employ of the Company or any of its Corporate  Affiliates
for any  period  of  specific  duration,  and such  person's  employment  may be
terminated at any time, with or without cause.

                  (f) The  provisions  of the Plan shall be governed by the laws
of the State of California.


                                      10.
<PAGE>


                                   Schedule A

                           Companies Participating in
                        1988 Employee Stock Purchase Plan

                             As of January 30, 1998


                               Komag, Incorporated

                         Komag Material Technology, Inc.

                          Komag U.S.A. (Malaysia) Sdn.

                            Komag Asia Pacific, Inc.


<PAGE>

                                                                      APPENDIX A


PROXY                 THIS PROXY IS SOLICITED ON BEHALF OF                 PROXY

                 THIS BOARD OF DIRECTORS OF KOMAG, INCORPORATED


     The  undersigned  hereby appoints STEPHEN C. JOHNSON and TU CHEN, or either
of  them,  as  lawful agents and proxies of the undersigned (with all powers the
undersigned  would  possess  if  personally  present,  including  full  power of
substitution)  to  represent  and  to  vote  all shares of the Company's capital
stock  which the undersigned is entitled to vote at the Company's Annual Meeting
of Stockholders on May 27, 1998, and any adjournment or postponements thereof as
follows:

                (Continued, and to be signed on the other side)

                            - FOLD AND DETACH HERE -
<PAGE>
<TABLE>
<CAPTION>
<S>                                  <C>      <C>         <C> 
                                                                                                                     [X] Please mark
                                                                                                                          your votes
                                                                                                                             as this



                                                                                                              FOR  AGAINST  ABSTAIN
                                              WITHHOLD    2. APPROVAL OF AMENDMENT TO THE COMPANY'S 1988      [ ]    [ ]      [ ]
1. ELECTIONS OF DIRECTORS            FOR       FOR ALL       EMPLOYEE STOCK PURCHASE PLAN                                      
                                     [ ]         [ ]                                                                  
   INSTRUCTION: If  you wish  to                          3. RATIFICATION OF APPOINTMENT OF ERNST & YOUNG     [ ]    [ ]      [ ]
   withhold authority to vote for                            LLP AS INDEPENDENT AUDITORS                                          
   any individual nominee, strike                                                                            
   a line through that  nominee's                                                                            
   name in the list below:                                                                                   
                                                          Receipt  is  hereby  acknowledged  to the  Notice  
Tu  Chen,  Stephen  C. Johnson, Craig R. Barrett,         of Annual Meeting of Shareholders  and   
Chris A. Eyre, Irwin Federman, George A. Neil,            Proxy Statement dated April 10 1998.                        
Max Palevsky, Anthony Sun, Masayoshi Takebayashi                                                             
                                                             PLEASE MARK, SIGN, DATE AND RETURN THIS PROXY   
                                                             CARD PROMPTLY, USING THE ENCLOSED ENVELOPE.     
- --------------------------------------------------                                                           
                                                          This Proxy will be voted as  directed,  or if  
I PLAN TO ATTEND THE MEETING         [ ]                  no direction is indicated,  will be voted FOR  
                                                          each  of  the  proposals  below  and,  at the  
                                                          direction  of the  persons  named as  proxies  
                                                          upon such other  matters as may properly come  
                                                          before the meeting. This Proxy may be revoked  
                                                          at any time before it is voted.                
                                                                                                          
                                                          The Board of Directors  recommends a vote FOR   
                                                          Items 1, 2 and 3.                              
                                                          

                                                                                                                               [ ]


Signature(s) ----------------------------------------------------------------------    Dated -------------------------------- , 1998

NOTE:  (please sign exactly as shown on your stock  certificate and on the envelope in which this proxy was mailed.  When signing as
partner, corporate officer, attorney, executor, administrator, trustee, guardian, or in any other representative capacity, give full
title as such and sign your own name as well. If stock is held jointly, each joint owner should sign.)
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