KOMAG INC /DE/
S-8, 1999-08-05
MAGNETIC & OPTICAL RECORDING MEDIA
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          As filed with the Securities and Exchange Commission on August 5, 1999
                                                   Registration No. 333-________
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                   ----------
                                    FORM S-8
                             REGISTRATION STATEMENT
                                      Under
                           The Securities Act of 1933
                                   ----------
                               KOMAG, INCORPORATED
             (Exact name of registrant as specified in its charter)
          Delaware                                          94-2914864
(State or other jurisdiction                   (IRS Employer Identification No.)
of incorporation or organization)

                   1704 Automation Parkway, San Jose, CA 95131
               (Address of principal executive offices) (Zip Code)
                                   ----------
              KOMAG, INCORPORATED 1988 EMPLOYEE STOCK PURCHASE PLAN
             KOMAG, INCORPORATED 1997 SUPPLEMENTAL STOCK OPTION PLAN
                            (Full title of the Plan)

                                   ----------

                               STEPHEN C. JOHNSON
                      President and Chief Executive Officer
                               KOMAG, INCORPORATED
                   1704 Automation Parkway, San Jose, CA 95131
                     (Name and address of agent for service)
                                 (408) 576-2000
          (Telephone number, including area code, of agent for service)
                                   ----------
<TABLE>
                                         CALCULATION OF REGISTRATION FEE
================================================================================================================
<CAPTION>
                                                             Proposed           Proposed
   Title of                                                   Maximum            Maximum
  Securities                               Amount            Offering           Aggregate             Amount of
     to be                                  to be              Price            Offering            Registration
  Registered                             Registered(1)     per Share(2)         Price(2)                 Fee
  ----------                             -------------     ------------         --------                 ---

<S>                                       <C>                 <C>              <C>                    <C>
Common Stock, $0.01 par value             5,350,000           $3.6875          $19,728,125            $5,484.42
================================================================================================================
<FN>
(1)      This  Registration  Statement  shall also cover any  additional  shares of Common  Stock  which  become
         issuable under the Registrant's Amended and Restated 1988 Employee Stock Purchase Plan by reason of any
         stock dividend,  stock split,  recapitalization or any other similar  transaction  effected without the
         Registrant's  receipt of consideration which results in an increase in the number of outstanding shares
         of the Registrant's Common Stock.

(2)      Calculated  solely for purposes of this offering  under Rule 457(h) of the  Securities  Act of 1933, as
         amended,  on the basis of the  average  of the high and low sales  price per share of the  Registrant's
         Common Stock on August 2, 1999, as reported on the Nasdaq National Market.
</FN>
</TABLE>

<PAGE>



                                     PART II

               Information Required in the Registration Statement

Item 3.  Incorporation of Certain Documents by Reference

         Komag, Incorporated (the "Registrant") hereby incorporates by reference
into this Registration  Statement the following documents  previously filed with
the Securities and Exchange Commission (the "SEC"):

         (a)      The  Registrant's  Annual  Report on Form 10-K for the  fiscal
                  year ended January 3, 1998;

         (b)      The Registrant's  Quarterly Report on Form 10-Q for the fiscal
                  quarter ended April 4, 1999 and the fiscal  quarter ended July
                  4, 1999; and

         (c)      The  description of the  Registrant's  common stock,  which is
                  incorporated  by  reference to the  Registrant's  Registration
                  Statement on Form 8-A filed with the SEC on April 29, 1988.

         All  reports  and  definitive  proxy or  information  statements  filed
pursuant to Section 13(a),  13(c), 14 or 15(d) of the Securities Exchange Act of
1934 (the "1934 Act") after the date of this Registration Statement and prior to
the filing of a  post-effective  amendment  which  indicates that all securities
offered hereby have been sold or which deregisters all securities then remaining
unsold shall be deemed to be  incorporated  by reference into this  Registration
Statement and to be a part hereof from the date of filing of such documents. Any
statement  contained in a document  incorporated or deemed to be incorporated by
reference  herein shall be deemed to be modified or  superseded  for purposes of
this Registration  Statement to the extent that a statement  contained herein or
in any  subsequently  filed document which also is deemed to be  incorporated by
reference  herein modifies or supersedes  such statement.  Any such statement so
modified or superseded shall not be deemed, except as so modified or superseded,
to constitute a part of this Registration Statement.

Item 4.  Description of Securities

         Not applicable.

Item 5.  Interests of Named Experts and Counsel

         Not applicable.

Item 6.  Indemnification of Directors and Officers

         The Registrant's Restated Certificate of Incorporation provides that no
director of the Registrant will be personally liable to the Registrant or any of
its  stockholders  for monetary  damages arising from such director's  breach of
fiduciary  duty.  However,  this  provision  does not apply with  respect to any
action in which the director would be liable under Section 174 of Title 8 of the
General  Corporation  Law of  Delaware,  nor does it apply  with  respect to any
liability  resulting from any transaction in which the director (i) breached his
duty of loyalty to the Registrant or its stockholders;  (ii) did not act in good
faith or, in failing to act, did not act in good faith;  (iii) acted in a manner
involving intentional misconduct or a knowing violation of law or, in failing to
act, acted in a manner involving  intentional  misconduct or a knowing violation
of law; or (iv) derived an improper personal benefit.

         Pursuant to the  provisions  of Section 145 of the General  Corporation
Law of Delaware,  every

<PAGE>

Delaware  corporation has power to indemnify any person who was or is a party or
is threatened to be made a party to any threatened, pending or completed action,
suit or proceeding  (other than an action by or in the right of the corporation)
by reason of the fact that he is or was a director,  officer,  employee or agent
of the Registrant or of any corporation,  partnership,  joint venture,  trust or
other  enterprise for which he is or was serving in such capacity at the request
of the Registrant,  against any and all expenses,  judgments,  fines and amounts
paid in  settlement  and  reasonably  incurred  by him in  connection  with such
action,  suit or proceeding.  The power to indemnify applies only if such person
acted in good  faith and in a manner he  reasonably  believed  to be in the best
interests,  or not opposed to the best interests,  of the corporation,  and with
respect to any criminal action or proceeding, had no reasonable cause to believe
his conduct was unlawful.

         The power to indemnify such person applies to actions  brought by or in
the right of the  corporation  as well,  but only to the extent of  defense  and
settlement  expenses and not to any  satisfaction of a judgment or settlement of
the claim  itself,  and with the  further  limitation  that in such  actions  no
indemnification  shall be made in the event of any adjudication of negligence or
misconduct  on the past of such  person,  unless the court,  in its  discretion,
feels that in the light of all the circumstances indemnification should apply.

         To the extent any person referred to in the two  immediately  preceding
paragraphs is successful in the defense of the actions referred to therein, such
person is,  pursuant to Section 145 of the  Delaware  General  Corporation  Law,
entitled to indemnification as described above. Section 145 also grants power to
advance  litigation  expenses  upon  receipt  of an  undertaking  to repay  such
advances  in the event no right to  indemnification  is  subsequently  shown.  A
corporation may also obtain insurance at its expense to protect anyone who might
be indemnified, or has a right to insist on indemnification, under the statute.

         The Registrant  has entered into  indemnification  agreements  with its
then current  directors and officers  which provide for  indemnification  to the
fullest extent permitted by Delaware General  Corporation Law, including Section
145 thereof.

Item 7.  Exemption from Registration Claimed

         Not applicable.

Item 8.  Exhibits

         See exhibit index.

Item 9.  Undertakings

         A. The undersigned  Registrant hereby  undertakes:  (1) to file, during
any period in which offers or sales are being made, a  post-effective  amendment
to this Registration Statement (i) to include any prospectus required by Section
10(a)(3) of the Securities Act of 1933 (the "1933 Act"),  (ii) to reflect in the
prospectus  any  facts  or  events  arising  after  the  effective  date of this
Registration  Statement (or the most recent  post-effective  amendment  thereof)
which,  individually or in the aggregate,  represent a fundamental change in the
information set forth in this Registration  Statement,  and (iii) to include any
material  information  with respect to the plan of  distribution  not previously
disclosed  in  this  Registration  Statement  or any  material  change  to  such
information in this  Registration  Statement;  provided,  however,  that clauses
(1)(i) and (1)(ii) shall not apply if the information required to be included in
a post-effective  amendment by those paragraphs is contained in periodic reports
filed by the Registrant  pursuant to Section 13 or Section 15(d) of the 1934 Act
that are incorporated by reference into the registration statement; (2) that for
the  purpose  of  determining  any  liability  under  the  1933  Act  each  such
post-effective  amendment  shall be  deemed to be a new  registration  statement
relating to the securities  offered  therein and the offering of such securities
at that

<PAGE>

time shall be deemed to be the initial bona fide  offering  thereof;  and (3) to
remove  from  registration  by means of a  post-effective  amendment  any of the
securities being registered which remain unsold upon the termination of the 1988
Employee Stock Purchase Plan.

         B. The undersigned  Registrant  hereby undertakes that, for purposes of
determining  any liability  under the 1933 Act, each filing of the  Registrant's
annual report pursuant to Section 13(a) or Section 15(d) of the 1934 Act that is
incorporated by reference into this Registration Statement shall be deemed to be
a new registration statement relating to the securities offered therein, and the
offering of such  securities at that time shall be deemed to be the initial bona
fide offering thereof.

         C. Insofar as  indemnification  for liabilities  arising under the 1933
Act may be  permitted  to  directors,  officers  or  controlling  persons of the
Registrant  pursuant to the indemnity  provisions  summarized in Item 6 above or
otherwise,  the Registrant has been informed that in the opinion of the SEC such
indemnification  is against  public  policy as expressed in the 1933 Act and is,
therefore,  unenforceable. In the event that a claim for indemnification against
such liabilities  (other than the payment by the Registrant of expenses incurred
or paid by a director,  officer or  controlling  person of the Registrant in the
successful  defense of any  action,  suit or  proceeding)  is  asserted  by such
director,  officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been  settled by  controlling  precedent,  submit to a court of  appropriate
jurisdiction the question whether such  indemnification  by it is against public
policy  as  expressed  in the  1933  Act  and  will  be  governed  by the  final
adjudication of such issue.



<PAGE>

                                   SIGNATURES

                  Pursuant to the requirements of the Securities Act of 1933, as
amended, the Registrant certifies that it has reasonable grounds to believe that
it meets all of the requirements for filing on Form S-8 and has duly caused this
Registration Statement to be signed on its behalf by the undersigned,  thereunto
duly authorized,  in the City of San Jose, State of California,  on this 5th day
of August, 1999.


                                      KOMAG, INCORPORATED


                                      By:______________________________________
                                        Stephen C. Johnson
                                        President  and Chief  Executive
Officer


                                POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

                  That  the   undersigned   officers  and  directors  of  Komag,
Incorporated,  a Delaware corporation,  do hereby constitute and appoint Stephen
C. Johnson and William L. Potts, Jr., and each of them, the lawful attorneys and
agents,  with full power and  authority to do any and all acts and things and to
execute any and all instruments which said attorneys and agents,  and any one of
them,  determine  may be  necessary  or  advisable  or  required  to enable said
corporation to comply with the Securities Act of 1933, as amended, and any rules
or regulations  or  requirements  of the  Securities and Exchange  Commission in
connection with this Registration Statement.  Without limiting the generality of
the foregoing  power and  authority,  the powers  granted  include the power and
authority to sign the names of the  undersigned  officers  and  directors in the
capacities  indicated  below  to  this  Registration  Statement,  to any and all
amendments,  both  pre-effective  and  post-effective,  and  supplements to this
Registration  Statement,  and to any and all  instruments or documents  filed as
part of or in  conjunction  with this  Registration  Statement or  amendments or
supplements  thereof,  and each of the undersigned  hereby ratifies and confirms
all that said attorneys and agents, or any of them, shall do or cause to be done
by virtue hereof. This Power of Attorney may be signed in several counterparts.

                  IN WITNESS WHEREOF,  each of the undersigned has executed this
Power of Attorney as of the date indicated.

<TABLE>
                  Pursuant to the requirements of the Securities Act of 1933, as
amended,  this  Registration  Statement  has been signed below by the  following
persons in the capacities and on the dates indicated.

<CAPTION>
Signatures                                        Title                                          Date
- ----------                                        -----                                          ----


<S>                                               <C>                                            <C>
- --------------------------                        President, Chief Executive Officer             August 4, 1999
Stephen C. Johnson                                and Director (Principal Executive
                                                  Officer)

<PAGE>

Signatures                                        Title                                          Date
- ----------                                        -----                                          ----


- --------------------------                        Chairman of the Board                          August 4, 1999
Tu Chen



- --------------------------                        Senior Vice President,                         August 4, 1999
William L. Potts, Jr.                             Chief Financial Officer and
                                                  Secretary (Principal Financial
                                                  and Accounting Officer)



- --------------------------                        Director                                       August 4, 1999
Chris A. Eyre



- --------------------------                        Director                                       August 4, 1999
Irwin Federman



- --------------------------                        Director                                       August 4, 1999
George A. Neil



- --------------------------                        Director                                       August 4, 1999
Michael R. Splinter



- --------------------------                        Director                                       August 4, 1999
Anthony Sun



- --------------------------                        Director                                       August 4, 1999
Masayoshi Takebayashi

</TABLE>

<PAGE>



                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                    EXHIBITS

                                       TO

                                    FORM S-8

                                      UNDER

                             SECURITIES ACT OF 1933


                               KOMAG, INCORPORATED



<PAGE>


                                  EXHIBIT INDEX

 Exhibit Number       Exhibit
 --------------       -------

     5.1              Opinion of Wilson Sonsini Goodrich and Rosati

    23.1              Consent of Ernst & Young LLP

    23.2              Consent of Chuo Audit Corporation

    23.3              Consent of Wilson Sonsini Goodrich and Rosati (included in
                      Exhibit 5.1)

    24                Power of Attorney (see signature page)

    99.1              Komag,  Incorporated 1988 Employee Stock Purchase Plan (as
                      amended and restated on February 4, 1999)

    99.2*             Form of Enrollment Form to be generally used in connection
                      with Komag,  Incorporated  1988  Employee  Stock  Purchase
                      Plan.

    99.3              Komag,  Incorporated 1997  Supplemental  Stock Option Plan
                      (as amended on June 12, 1998).

    99.4              Notice of Grant generally used in connection with the 1997
                      Supplemental Stock Option Plan.

    99.5              Form  of  Stock  Option   Agreement   generally   used  in
                      connection with the 1997 Supplemental Stock Option Plan.

*  Incorporated  by  reference  to  Exhibits  28.1 and  28.2,  respectively,  to
Registrant's  Registration Statement No. 33-53432 on Form S-8 filed with the SEC
on October 16, 1992 .






                                   EXHIBIT 5.1

                 Opinion of Wilson, Sonsini, Goodrich and Rosati


                  [Wilson Sonsini Goodrich & Rosati letterhead]


                                 August 4, 1999


Komag, Incorporated
1704 Automation Parkway
San Jose, CA 95131

         Re:      Registration Statement on Form S-8

Ladies and Gentlemen:

We have examined the Registration  Statement on Form S-8 to be filed by you with
the  Securities  and  Exchange  Commission  on or about  August  5th,  1999 (the
"Registration  Statement"),  in  connection  with  the  registration  under  the
Securities  Act of 1933,  as amended,  of an aggregate  of  5,350,000  shares of
Common Stock, no par value (the "Shares"), reserved for issuance pursuant to the
Komag,   Incorporated   1998  Employee   Stock  Purchase  Plan  and  the  Komag,
Incorporated 1997  Supplemental  Stock Option Plan (together,  the "Plans").  As
your legal counsel, we have examined the proceedings taken and are familiar with
the  proceedings  proposed  to be taken by you in  connection  with the sale and
issuance of the Shares under the Plans.

         It is our opinion  that the Shares will be, when issued and sold in the
manner  referred to in the Plans,  legally and  validly  issued,  fully paid and
nonassessable.

         We consent to the use of this opinion as an exhibit to the Registration
Statement and further  consent to the use of our name wherever  appearing in the
Registration Statement and any subsequent amendment thereto.


                                            Very truly yours,

                                            WILSON SONSINI GOODRICH & ROSATI
                                            Professional Corporation

/s/ Wilson Sonsini Goodrich & Rosati





                                  EXHIBIT 23.1

               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS


               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS


We consent to the incorporation by reference in the Registration Statement (Form
S-8)  pertaining to the Komag,  Incorporated  1988 Employee Stock Purchase Plan,
and the Komag,  Incorporated 1997  Supplemental  Stock Option Plan of our report
dated January 22, 1999, with respect to the  consolidated  financial  statements
and schedule of Komag,  Incorporated  included in its Annual  Report (Form 10-K)
for the year ended  January 3, 1999,  filed  with the  Securities  and  Exchange
Commission.



ERNST & YOUNG, LLP

San Jose, California
August 5, 1999






                                  EXHIBIT 23.2

                       CONSENT OF INDEPENDENT ACCOUNTANTS

                       [Chuo Audit Corporation letterhead]


                       CONSENT OF INDEPENDENT ACCOUNTANTS


We consent to the  incorporation by reference in the  registration  statement of
Komag,  Incorporated  on Form S-8  pertaining  to the Komag,  Incorporated  1988
Restated  Employee  Stock Purchase Plan and the 1997  Supplemental  Stock Option
Plan filed on or about August 4, 1999 as of our report dated January 22, 1999 on
our audits of the consolidated  financial statements of Asahi Komag Co., Ltd. As
of December 31, 1998 and 1997, and for the years ended  December 31, 1998,  1997
and 1996,  which report is included in the Annual  Report on Form 10-K of Komag,
Incorporated for the year ended December 31, 1998.


Chuo Audit Corporation
Tokyo, Japan
July 30, 1999








                                  EXHIBIT 23.3

                 consent of Wilson, Sonsini, Goodrich and Rosati
                             Included in Exhibit 5.1




                                  EXHIBIT 99.1

                        1988 Employee Stock Purchase Plan
                        (As amended on February 4, 1999)
                               KOMAG, INCORPORATED                  Exhibit 99.1

                        1988 EMPLOYEE STOCK PURCHASE PLAN

              (Restated June 29, 1992 and Amended January 27, 1994,
            January 22, 1997, January 30, 1998 and February 4, 1999)

       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
employee-Participants.



<PAGE>


                  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
purchase periods, each of such duration (not to exceed six 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  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.



<PAGE>


                  (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.

                  (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 two (2) 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  7,400,000  shares  (subject  to
adjustment under Section VI(b)). Such share reserve includes the 2,550,000-share
increase  authorized  by the Board on February 4, 1999,  subject to  stockholder
approval at the 1999 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



<PAGE>

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) 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



<PAGE>

share-limitations  has been adjusted to reflect the two-for-one forward split of
the Stock effected on December 21, 1995.

                  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.

                  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


<PAGE>

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 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



<PAGE>

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.

                  -         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.



<PAGE>

                  (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 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,  January 22,
1997,  and January 30, 1998 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 February 4, 1999, the Board authorized
an amendment to the Plan to increase the number of shares of Stock available for
issuance  hereunder by an additional  2,550,000  shares,  subject to stockholder
approval  at the  1999  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 2,550,000-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.



<PAGE>






                                   Schedule A

                           Companies Participating in
                        1988 Employee Stock Purchase Plan

                             As of February 4, 1999


                               Komag, Incorporated

                         Komag Material Technology, Inc.

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

                            Komag Asia Pacific, Inc.









                                  EXHIBIT 99.3
                       1997 Supplemental Stock Option Plan
                          (As amended on June 12, 1998)



                               KOMAG, INCORPORATED

                       1997 SUPPLEMENTAL STOCK OPTION PLAN

                             (Amended June 12, 1998)

                                   ARTICLE ONE

                               GENERAL PROVISIONS


       I.         PURPOSES OF THE PLAN

                  This 1997 Non-Executive Officer Stock Option Plan (the "Plan")
is  intended  to  promote  the  interests  of Komag,  Incorporated,  a  Delaware
corporation  (the  "Corporation"),   by  providing  a  method  whereby  eligible
individuals  may be offered  incentives and rewards which will encourage them to
acquire  a  proprietary   interest,  or  otherwise  increase  their  proprietary
interest,  in the Corporation and continue to render services to the Corporation
(or its parent or subsidiary corporations).

      II.         ADMINISTRATION OF THE PLAN

                  A. The Plan shall be  administered  by one or more  committees
comprised of Board members (the  "Committee")  or the Board may retain the power
to administer the Plan.  The members of the Committee  shall each serve for such
period of time as the Board may determine and shall be subject to removal by the
Board at any time.

                  B.  The  Committee  (or the  Board  if no  Committee  has been
designated) shall serve as the Plan  Administrator and shall have full power and
authority  (subject to the express  provisions  of the Plan) to  establish  such
rules and regulations as it may deem  appropriate for the proper  administration
of such  program  and to make  such  determinations  under the  program  and any
outstanding option as it may deem necessary or advisable.  Decisions of the Plan
Administrator  shall be final and binding on all parties with an interest in the
Plan or any options or shares issued hereunder.

     III.         ELIGIBILITY FOR OPTION GRANTS

                  A.  The persons eligible to participate in the Plan shall be

                      -     employees  (excluding  officers  and  directors)  of
         the  Corporation (or its parent or subsidiary corporations), or

                      -     independent   contractors    and   consultants   who
         provide  valuable   services  to  the  Corporation  (or  its  parent or
         subsidiary corporations).

                  B.  The Plan Administrator shall have full authority to select
the eligible  individuals  who are to receive  option grants under the Plan, the
number of shares to be  covered  by each  granted  option,  the time or times at
which such option is to become  exercisable  and the maximum  term for which the
option is to be outstanding.



<PAGE>

                  C.  For purposes  of the Plan, the following provisions shall
be applicable  in  determining  the parent and  subsidiary  corporations  of the
Corporation:

                      Any  corporation   (other  than  the  Corporation)  in  an
         unbroken chain of  corporations  ending with the  Corporation  shall be
         considered to be a parent corporation of the Corporation, provided each
         such  corporation  in the unbroken  chain (other than the  Corporation)
         owns, at the time of the determination,  stock possessing fifty percent
         (50%) or more of the total  combined  voting  power of all  classes  of
         stock in one of the other corporations in such chain.

                      Each  corporation  (other  than  the  Corporation)  in  an
         unbroken chain of corporations  beginning with the Corporation shall be
         considered  to be a subsidiary of the  Corporation,  provided each such
         corporation  (other than the last  corporation)  in the unbroken  chain
         owns, at the time of the determination,  stock possessing fifty percent
         (50%) or more of the total  combined  voting  power of all  classes  of
         stock in one of the other corporations in such chain.

      IV.         STOCK SUBJECT TO THE PLAN

                  A.  The stock  issuable  under the Plan shall be shares of the
Corporation's  authorized but unissued or reacquired Common Stock. The aggregate
number of shares  which may be issued over the term of the Plan shall not exceed
Six Million One Hundred Thousand  (6,100,000) shares (subject to adjustment from
time to time in accordance with paragraph IV.C of this Article One).

                  B.  Should an option be  terminated  for any  reason  prior to
exercise  in whole or in part,  the shares  subject to the portion of the option
not so exercised  shall be available  for  subsequent  option  grants under this
Plan.  In  addition,  unvested  shares  issued  under the Plan and  subsequently
repurchased by the  Corporation  at the original  exercise price paid per share,
pursuant to the  Corporation's  repurchase  rights under the Plan shall be added
back to the number of shares of Common Stock  reserved  for  issuance  under the
Plan and shall  accordingly  be  available  for  reissuance  through one or more
subsequent option grants under the Plan.

                  C.  In the  event  any  change  is made  to the  Common  Stock
issuable  under the Plan  (whether  by reason of (i)  merger,  consolidation  or
reorganization   or  (ii)   recapitalization,   stock  dividend,   stock  split,
combination of shares,  exchange of shares or other similar change affecting the
outstanding  Common  Stock  as a class  without  the  Corporation's  receipt  of
consideration),  then  unless  such  change  results in the  termination  of all
outstanding options pursuant to the provisions of paragraph II of Article Two of
the Plan,  appropriate  adjustments  shall be made to (i) the  aggregate  number
and/or class of shares issuable under the Plan, and (ii) the number and/or class
of shares and price per share in effect under each outstanding  option under the
Plan.  The purpose of such  adjustments to the  outstanding  options shall be to
preclude the enlargement or dilution of rights and benefits under such options.



<PAGE>


                                   ARTICLE TWO

                              OPTION GRANT PROGRAM


       I.         TERMS AND CONDITIONS OF OPTIONS

                  Options  granted   pursuant  to  this  Article  Two  shall  be
authorized  by  action  of the Plan  Administrator  and  shall be  Non-Statutory
Options.  The granted  options shall be evidenced by instruments in such form as
the Plan Administrator shall from time to time approve; provided,  however, that
each such instrument  shall comply with and incorporate the terms and conditions
specified below.

                  A.  Option Price.

                           1. The option  price per share  shall be fixed by the
Plan Administrator.  In no event,  however,  shall the option price per share be
less  than one  hundred  percent  (100%) of the fair  market  value per share of
Common Stock on the date of the option grant.

                           2. The option price shall become immediately due upon
exercise of the option and shall be payable as follows:

                                 (i) full  payment in cash or check drawn to the
         Corporation's order;

                                 (ii) full  payment  in  shares of Common  Stock
         held by the  optionee  for the  requisite  period  necessary to avoid a
         charge to the Corporation's  earnings for financial  reporting purposes
         and valued at fair market value on the  Exercise  Date (as such term is
         defined below) equal to the option price; or

                                 (iii) full  payment  through a  combination  of
         shares of Common Stock held by the optionee  for the  requisite  period
         necessary to avoid a charge to the Corporation's earnings for financial
         reporting purposes and valued at fair market value on the Exercise Date
         and cash or check, equal in the aggregate to the option price.

                                 (iv) to the extent the option is exercised  for
         vested   shares,   the  option   price  may  also  be  paid  through  a
         broker-dealer  sale and  remittance  procedure  pursuant  to which  the
         optionee   shall   provide   irrevocable    instructions   to   (I)   a
         Corporation-designated  brokerage  firm to effect the immediate sale of
         the  purchased  shares  and remit to the  Corporation,  out of the sale
         proceeds  available  on the  settlement  date,  an amount  equal to the
         aggregate  option  price  payable  for the  purchased  shares  plus all
         applicable Federal and State income and employment taxes required to be
         withheld by the  Corporation  by reason of such  purchase  and (II) the
         Corporation  to  deliver  the  certificates  for the  purchased  shares
         directly to such brokerage firm.

                           For  purposes of this  subparagraph  2, the  Exercise
Date  shall  be the  date on which  notice  of the  exercise  of the  option  is
delivered  to the  Corporation.  Except to the  extent  the sale and  remittance
procedure is utilized in connection with the exercise of the option,  payment of
the option price for the purchased shares must accompany such notice.

                           3. The fair market  value of a share of Common  Stock
on any  relevant  date  under



<PAGE>

subparagraph 1 or 2 above (and for all other valuation  purposes under the Plan)
shall be determined in accordance with the following provisions:

                                 (i) If the Common  Stock is at the time  traded
         on the Nasdaq National Market,  then the fair market value shall be the
         closing selling price per share of Common Stock on the day prior to the
         date in question, as such price is reported by the National Association
         of Securities  Dealers on the Nasdaq  National  Market or any successor
         system.  If there is no closing  selling  price for the Common Stock on
         the day prior to the date in question, then the fair market value shall
         be the closing  selling price on the last preceding date for which such
         quotation exists.

                                 (ii) If the Common  Stock is at the time listed
         on either the New York Stock Exchange or the American  Stock  Exchange,
         then the fair market value shall be the closing selling price per share
         of  Common  Stock  on the day  prior to the  date in  question  on such
         exchange,  as such price is officially  quoted in the composite tape of
         transactions on that exchange. If there is no closing selling price for
         the  Common  Stock on the day prior to the date in  question,  then the
         fair  market  value  shall  be the  closing  selling  price on the last
         preceding date for which such quotation exists.

                  B.  Term and Exercise of Options.

                      Each  option  granted  under  this  Article  Two  shall be
exercisable  at such time or times,  during such period,  and for such number of
shares as shall be  determined  by the Plan  Administrator  and set forth in the
instrument  evidencing such option;  provided,  however,  that no option granted
under this  Article  Two shall  have a maximum  term in excess of ten (10) years
from the grant date.

                  C.  Limited Transferability of Options.

                      During the lifetime of the  optionee,  the option shall be
exercisable  only by the optionee and shall not be assignable or transferable by
the optionee  otherwise than by will or by the laws of descent and  distribution
following the optionee's death. However, the Plan Administrator may grant one or
more options under this Article Two which may, in connection with the optionee's
estate plan, be assigned in whole or in part during the  optionee's  lifetime to
one or more members of the optionee's immediate family or to a trust established
exclusively for one or more such family members.  The assigned  portion may only
be exercised by the person or persons who acquire a proprietary  interest in the
option pursuant to the assignment.  The terms applicable to the assigned portion
shall be the same as those in effect  for the option  immediately  prior to such
assignment  and shall be set forth in such  documents  issued to the assignee as
the Plan Administrator may deem appropriate.



<PAGE>


                  D.  Termination of Service.

                      1. Should an  optionee  cease to remain in Service for any
reason (including death,  permanent disability or retirement at or after age 65)
while the holder of one or more  outstanding  options  granted to such  optionee
under the Plan,  then such  option or  options  shall not  (except to the extent
otherwise  provided pursuant to paragraph VII below) remain exercisable for more
than a twelve  (12)-month period (or such shorter period as is determined by the
Plan Administrator and set forth in the option agreement)  following the date of
cessation of Service;  provided,  however, that under no circumstances shall any
such option be  exercisable  after the specified  expiration  date of the option
term.  Except to the extent otherwise  provided  pursuant to subparagraph  I.D.4
below, each such option shall,  during such twelve (12)-month or shorter period,
be exercisable for any or all vested shares for which that option is exercisable
on the date of such  cessation of Service.  Upon the  expiration  of such twelve
(12)-month or shorter  period or (if earlier) upon the  expiration of the option
term, the option shall terminate and cease to be exercisable for any such vested
shares for which the option has not been exercised.  However,  the option shall,
immediately upon the optionee's cessation of Service,  terminate and cease to be
outstanding  with  respect to any  option  shares in which the  optionee  is not
otherwise  at that time vested or for which the option is not  otherwise at that
time exercisable.

                      2. Should the optionee  die while in Service,  or cease to
remain in Service and thereafter die while the holder of one or more outstanding
options  under the Plan,  each such  option  may be  exercised  by the  personal
representative  of the optionee's estate or by the person or persons to whom the
option is transferred  pursuant to the optionee's will or in accordance with the
laws of descent and distribution  but, except to the extent  otherwise  provided
pursuant to subparagraph I.D.4 below, only to the extent of the number of vested
shares  (if  any)  for  which  the  option  is  exercisable  on the  date of the
optionee's death. Such exercise must be effected prior to the earlier of (i) the
first  anniversary  of the date of the  optionee's  death or (ii) the  specified
expiration  date of the option term.  Upon the  occurrence of the earlier event,
the option shall terminate and cease to be exercisable.

                      3. If (i) the  optionee's  Service is terminated for cause
(including, but not limited to, any act of dishonesty, willful misconduct, fraud
or  embezzlement  or  any   unauthorized   disclosure  or  use  of  confidential
information or trade secrets) or (ii) the optionee makes or attempts to make any
unauthorized  use or disclosure of confidential  information or trade secrets of
the Corporation or its parent or subsidiary corporations, then in any such event
all outstanding  options granted the optionee under the Plan shall terminate and
cease to be  exercisable  immediately  upon such  cessation  of  Service  or (if
earlier) upon such  unauthorized  use or disclosure  of  confidential  or secret
information or attempt thereat.

                      4. The Plan Administrator shall have complete  discretion,
exercisable either at the time the option is granted or at the time the optionee
dies,  retires at or after age 65, or ceases to remain in Service,  to establish
as a provision  applicable to the exercise of one or more options  granted under
the Plan that  during the  limited  period of  exercisability  following  death,
retirement  at or after age 65, or cessation  of Employee  status as provided in
subparagraph  I.D.1 or I.D.2 above,  the option may be  exercised  not only with
respect to the number of vested shares for which it is  exercisable  at the time
of the  optionee's  cessation  of Service,  but also with respect to one or more
subsequent  installments  in which the optionee would have otherwise  vested had
such cessation of Service not occurred.

                      5.  For  purposes  of the  foregoing  provisions  of  this
paragraph I.D (and all other provisions of the Plan),

                      -   The  optionee  shall  be   deemed  to  remain  in  the
         Service  of the  Corporation  for so long as  such  individual  renders
         services  on a  periodic  basis to the  Corporation  (or any  parent or
         subsidiary  corporation) in the capacity of an Employee, a non-employee
         member



<PAGE>

         of the Board or an independent consultant or advisor.

                      -   The optionee  shall  be considered to  be an  Employee
         for so long as such individual remains in the employ of the Corporation
         or one or more of its parent or subsidiary corporations, subject to the
         control and  direction  of the  employer  not only as to the work to be
         performed but also as to the manner and method of performance.

                  E.  Stockholder Rights.

                      An  option  holder  shall  have  none of the  rights  of a
stockholder  with  respect  to any  shares  covered  by the  option  until  such
individual  shall have  exercised  the  option,  paid the option  price and been
issued a stock certificate for the purchased shares. No adjustment shall be made
for  dividends  or  distributions  (whether  paid in cash,  securities  or other
property)  for which the record date is prior to the date the stock  certificate
is issued.

                  F.  Repurchase Rights.

                      The shares of Common Stock  acquired  upon the exercise of
options  granted  under this  Article  Two may be subject to  repurchase  by the
Corporation in accordance with the following provisions:

                      The  Plan  Administrator  shall  have  the  discretion  to
authorize  the  issuance of unvested  shares of Common  Stock under this Article
Two. Should the Optionee cease Service while holding such unvested  shares,  the
Corporation  shall  have the right to  repurchase  any or all of those  unvested
shares at the option price paid per share.  The terms and conditions  upon which
such repurchase  right shall be exercisable  (including the period and procedure
for exercise and the  appropriate  vesting  schedule for the  purchased  shares)
shall be established by the Plan  Administrator  and set forth in the instrument
evidencing such repurchase right.

                      All of the  Corporation's  outstanding  repurchase  rights
shall automatically  terminate, and all shares subject to such terminated rights
shall immediately vest in full, upon the occurrence of any Corporate Transaction
under  paragraph  II of this  Article  Two,  except to the extent:  (i) any such
repurchase  right is to be  assigned  to the  successor  corporation  (or parent
thereof) in connection with the Corporate  Transaction or (ii) such  termination
is precluded by other limitations  imposed by the Plan Administrator at the time
the repurchase right is issued.

                      The  Plan  Administrator   shall  have  the  discretionary
authority,  exercisable  either  before or after  the  optionee's  cessation  of
Service, to cancel the Corporation's  outstanding repurchase rights with respect
to one or more  shares  purchased  or  purchasable  by the  optionee  under this
Article Two and thereby accelerate the vesting of such shares in connection with
the optionee's cessation of Service.

      II.         CORPORATE TRANSACTIONS

                  A.  In the event of any of the  following stockholder-approved
transactions (a "Corporate Transaction"):

                                 (i)  a  merger  or  acquisition  in  which  the
         Corporation is not the surviving  entity,  except for a transaction the
         principal  purpose of which is to change the State of the Corporation's
         incorporation,

                                 (ii) the sale, transfer or other disposition of
         all or substantially all of the assets of the Corporation, or



<PAGE>

                                 (iii)   any   reverse   merger   in  which  the
         Corporation is the surviving entity,

                      then each option  outstanding under this Article Two shall
automatically  become  exercisable,  during  the five (5)  business  day  period
immediately prior to the specified effective date for the Corporate Transaction,
with respect to the full number of shares of Common Stock purchasable under such
option  and may be  exercised  for all or any  portion  of such  shares as fully
vested shares of Common Stock. An outstanding option under the Plan shall not be
so accelerated,  however, if and to the extent (i) such option is, in connection
with  the  Corporate  Transaction,   either  to  be  assumed  by  the  successor
corporation  or  parent  thereof  or be  replaced  with a  comparable  option to
purchase  shares of the capital  stock of the  successor  corporation  or parent
thereof or (ii) the acceleration of such option is subject to other  limitations
imposed by the Plan Administrator at the time of grant.

                  B.  Immediately  following the  consummation  of the Corporate
Transaction,  all  outstanding  options under the Plan shall,  to the extent not
previously  exercised  or assumed  by the  successor  corporation  or its parent
company, terminate and cease to be exercisable.

                  C.  Each  outstanding  option under this  Article Two which is
assumed in connection with the Corporate Transaction or is otherwise to continue
in effect shall be  appropriately  adjusted,  immediately  after such  Corporate
Transaction,  to apply and pertain to the number and class of  securities  which
would have been issuable, in consummation of such Corporate  Transaction,  to an
actual  holder of the same  number of shares of Common  Stock as are  subject to
such  option  immediately  prior  to  such  Corporate  Transaction.  Appropriate
adjustments  shall also be made to the option price payable per share,  provided
the aggregate option price payable for such securities shall remain the same. In
addition,  the class and number of securities  available for issuance  under the
Plan  following  the  consummation  of  the  Corporate   Transaction   shall  be
appropriately adjusted.

                  D.  Option  grants  under  this Article  Two shall in  no  way
affect the  right  of the  Corporation  to  adjust,  reclassify,  reorganize  or
otherwise change  its capital or business  structure  or  to merge, consolidate,
dissolve,  liquidat  or sell or  transfer all  or any  part of  its  business or
assets.

     III.         CANCELLATION AND REGRANT

                  The Plan Administrator  shall have the authority to effect, at
any time and from time to time, with consent of the affected option holders, the
cancellation  of any or all  outstanding  options under the Plan and to grant in
substitution  therefor new options  covering  the same or  different  numbers of
shares of Common  Stock but  having  an  exercise  price per share  equal to one
hundred  percent  (100%) of the fair market value of the Common Stock on the new
grant date.

      IV.         EXTENSION OF EXERCISE PERIOD

                  The Plan  Administrator  shall have full power and  authority,
exercisable from time to time in its sole discretion,  to extend,  either at the
time the option is granted or at any time while such option remains outstanding,
the period of time for which the option is to remain  exercisable  following the
optionee's  cessation of Service or death from the twelve  (12)-month or shorter
period set forth in the option  agreement to such greater  period of time as the
Plan Administrator shall deem appropriate;  provided,  however, that in no event
shall such option be  exercisable  after the  specified  expiration  date of the
option term.



<PAGE>


                                  ARTICLE THREE

                                  MISCELLANEOUS

       I.         AMENDMENT OF THE PLAN

                  The  Board  shall  have  complete  and  exclusive   power  and
authority  to  amend  or  modify  the  Plan in any or all  respects  whatsoever.
However,  no such amendment or  modification  shall,  without the consent of the
holders,  adversely affect rights and obligations with respect to options at the
time outstanding under the Plan.

      II.         EFFECTIVE DATE AND TERM OF PLAN

                  A.  The Plan shall  become  effective upon its adoption by the
Board.  Unless sooner terminated in accordance with paragraph II of Article Two,
the Plan shall  terminate upon the earlier of (i) September 26, 2007 or (ii) the
date on which all shares  available for issuance  under the Plan shall have been
issued or cancelled  pursuant to the  exercise or  surrender of options  granted
hereunder. If the date of termination is determined under clause (i) above, then
options outstanding on such date shall not be affected by the termination of the
Plan and  shall  continue  to have  force  and  effect  in  accordance  with the
provisions of the instruments evidencing such options.

                  B.  On January 30, 1998, the Board  approved  an  amendment to
the Plan to increase the number of shares  of Common Stock reserved for issuance
over the term of the Plan by an additional 1,000,000 shares.

                  C.  On June 12,  1998,  the Board approved an amendment to the
Plan to increase the number of shares of Common Stock reserved for issuance over
the term of the Plan by an additional 1,500,000 shares.


     III.         USE OF PROCEEDS

                  Any cash proceeds received by the Corporation from the sale of
shares  pursuant  to options  granted  under the Plan shall be used for  general
corporate purposes.

      IV.         TAX WITHHOLDING

                  The  Corporation's  obligation to deliver  shares or cash upon
the exercise or surrender of any option  granted under the Plan shall be subject
to the  satisfaction  of all  applicable  federal,  state and local  income  and
employment tax withholding requirements.

       V.         NO EMPLOYMENT/SERVICE RIGHTS

                  Neither  the  action of the  Corporation  in  establishing  or
restating the Plan,  nor any action taken by the Plan  Administrator  hereunder,
nor any  provision  of the  restated  Plan shall be construed so as to grant any
individual the right to remain in the employ or service of the  Corporation  (or
any parent or subsidiary  corporation) for any period of specific duration,  and
the Corporation (or any parent or subsidiary  corporation retaining the services
of such individual) may terminate such individual's employment or service at any
time and for any reason, with or without cause.

      VI.         REGULATORY APPROVALS

                  A.  The implementation of the Plan, the granting of any option
hereunder,  and the issuance



<PAGE>

of stock upon the  exercise or  surrender of any such option shall be subject to
the  Corporation's   procurement  of  all  approvals  and  permits  required  by
regulatory  authorities  having  jurisdiction over the Plan, the options granted
under it and the stock issued pursuant to it.

                  B.  No shares of Common  Stock or other assets shall be issued
                      or  delivered  under the Plan unless and until there shall
                      have been compliance  with all applicable  requirements of
                      Federal and state  securities  laws,  including the filing
                      and  effectiveness of the Form S-8 registration  statement
                      for the shares of Common  Stock  issuable  under the Plan,
                      and  all  applicable  listing  requirements  of any  stock
                      exchange (or the Nasdaq National Market, if applicable) on
                      which Common Stock is then listed for trading.







                                  EXHIBIT 99.4

           Notice of Grant generally used in connection with the 1997
                        Supplemental Stock Option Plan.

                               KOMAG, INCORPORATED
                         NOTICE OF GRANT OF STOCK OPTION

                  Notice is hereby  given of the  following  option  grant  (the
"Option") to purchase  shares of the Common Stock of Komag,  Incorporated.  (the
"Corporation"):

    Optionee:___________________________________________

    Grant Date:_________________                Exercise Price:$______ per share

    Option Type:  Non-Statutory Stock Option    Number of Option Shares:________

    Vesting Commencement Date:____________      Expiration Date:________________


         Exercise  Schedule:  The Option shall become vested and exercisable for
twenty-five percent (25%) of the Option Shares upon Optionee's completion of one
(1) year of Service  measured  from the Grant Date and shall become  exercisable
for the balance of the Option Shares in thirty-six (36) successive equal monthly
installments upon Optionee's completion of each additional month of Service over
the  thirty-six  (36) month period  measured from the first  anniversary  of the
Grant Date.

Optionee  understands  and agrees  that the Option is granted  subject to and in
accordance with the terms of the Komag,  Incorporated  1997  Supplemental  Stock
Option Plan (the  "Option  Plan").  Optionee  further  agrees to be bound by the
terms of the  Option  Plan and the terms of the Option as set forth in the Stock
Option Agreement (the "Option  Agreement")  referenced herein.  Optionee assumes
responsibility  for reviewing the official  prospectus  for the Plan,  and Stock
Option Agreement  available on Komag's Intranet Stock Plan Pages, and on Komag's
Public File Server at KUS1\VOL1\KOMAG in the folder titled STKINFO:

             Plan summary and Prospectus file named      OPSCT97.DOC
             Plan Stock Option Agreement file named      OPAGR97.DOC

Copies of these  documents are also  available  upon request from the Stock Plan
Administrator.

         No  Employment  or Service  Contract.  Nothing in this Notice or in the
attached Option Agreement or in the Plan shall confer upon Optionee any right to
continue  in Service for any period of specific  duration or  interfere  with or
otherwise  restrict in any way the rights of the  Corporation  (or any Parent or
Subsidiary  employing  or retaining  Optionee) or of Optionee,  which rights are
hereby expressly  reserved by each, to terminate  Optionee's Service at any time
for any reason, with or without cause.

         Definitions.  All  capitalized  terms  in this  Notice  shall  have the
meaning assigned to them in this Notice or in the referenced Option Agreement.

KOMAG, INCORPORATED

By:______________________________               Optionee:_______________________

Title:___________________________               Date:___________________________






                                  EXHIBIT 99.5
           Form of Stock Option Agreement generally used in connection
                  with the 1997 Supplemental Stock Option Plan

                               KOMAG, INCORPORATED
                             STOCK OPTION AGREEMENT



                                   WITNESSETH:

RECITALS


         A.  The  Corporation's Board of Directors (the "Board") has adopted the
Corporation's  1997 Supplemental  Stock Option Plan (the "Plan") for the purpose
of attracting  and retaining  the services of employees and  consultants  of the
Corporation and its parent or subsidiary corporations.

         B.  Optionee is an individual who is to render valuable services to the
Corporation or its subsidiaries,  and this Agreement is executed pursuant to and
is  intended  to  carry  out the  purposes  of the Plan in  connection  with the
Corporation's grant of a stock option to Optionee.

         NOW, THEREFORE, it is hereby agreed as follows:

                  1.  Grant  of  Option.  Subject  to and  upon  the  terms  and
conditions  set  forth in this  Agreement,  the  Corporation  hereby  grants  to
Optionee,  as of the grant date (the "Grant Date") specified in the accompanying
Notice of Grant of Stock Option (the "Grant Notice"), a stock option to purchase
up to that  number of shares of the  Corporation's  Common  Stock  (the  "Option
Shares")  as is  specified  in the Grant  Notice.  Such Option  Shares  shall be
purchasable  from time to time during the option  term at the option  price (the
"Option Price") specified in the Grant Notice.

                  2. Option  Term.  This option shall have a maximum term of ten
(10)  years  measured  from the Grant Date and shall  accordingly  expire at the
close of business on the expiration date (the  "Expiration  Date")  specified in
the Grant Notice,  unless sooner  terminated in accordance  with  Paragraph 5 or
subparagraph 7(c).

                  3.  Limited  Transferability.  This  option  shall be  neither
transferable  nor  assignable  by Optionee  other than by will or by the laws of
descent and distribution following Optionee's death and may be exercised, during
Optionee's lifetime, only by Optionee.

                  4.  Dates of Vesting and Exercise.

                           (a) Except as otherwise  provided in this Paragraph 4
or in subparagraph 7(a), this option shall become vested and exercisable for the
Option  Shares  in one or more  installments  in  accordance  with the  exercise
schedule specified in the Grant Notice.  However,  the Optionee may not exercise
any vested  Option  Shares until July 1, 1999 except in the event of  Optionee's
death or  disability.  As this  option  becomes  vested in  installments,  those
installments  shall  accumulate,  and, after July 1, 1999,  this option shall be
vested and exercisable for the accumulated  installments until the expiration or
sooner termination of the option term.

                               Notwithstanding  the above,  if the  Optionee  is
terminated  involuntarily (other than for "Cause" (as defined herein)) following
a "Corporate Transaction" (as defined in Section 7(a)), this option shall become
fully exercisable as to the vested Option Shares and may be exercised for all or
any portion of the vested Option Shares for a thirty (30) day period  commencing
with the date of such cessation of Service. For this purpose, "Cause" is defined
as (i) an act  of  dishonesty  made  by the  Optionee  in  connection  with  the
Optionee's



<PAGE>

responsibilities as an employee,  (ii) Optionee's conviction of, or plea of nolo
contendere to, a felony,  (iii) Optionee's serious  misconduct,  (iv) Optionee's
continued violations of his or her employment duties after Optionee has received
a written demand for performance from the Corporation  which  specifically  sets
forth the  factual  basis for the  Corporation's  belief that  Optionee  has not
substantially  performed his or her duties, or (v) Optionee's death or permanent
and total disability.

                           (b) As of the  ninety-first  (91st) day following the
commencement  date  of any  unpaid  leave  of  absence  authorized  by the  Plan
Administrator (or its delegate) in writing,  the exercise schedule in effect for
this option shall  automatically  be suspended,  and the option shall not become
exercisable  for any additional  Option Shares,  until such time as the Optionee
returns to active  Service,  provided such return to active Service occurs on or
before the authorized  expiration date of the leave.  Upon such return to active
Service,  the exercise  schedule for this option shall be  reinstated  as of the
point where the suspension  occurred,  and this option shall  thereafter  become
exercisable  for one or more  additional  Option  Shares  under  the  reinstated
exercise  schedule over the  Optionee's  period of subsequent  Service and shall
remain so exercisable  until the expiration or sooner  termination of the option
term.

                  5.  Termination  of  Service.  The option  term  specified  in
Paragraph  2 shall  terminate  (and this option  shall cease to be  exercisable)
prior to the  Expiration  Date  should one of the  following  provisions  become
applicable:

                           (i)  Except  to  the  extent  otherwise  provided  in
Section 4 and  subparagraphs  (ii) through (iv) below,  should Optionee cease to
remain in Service at any time during the option term, then the vested portion of
this option shall not remain  exercisable for more than a thirty (30)-day period
commencing  with the date of such  cessation of Service.  Upon the expiration of
such thirty (30)-day  period or (if earlier) upon the specified  Expiration Date
of the option term, this option shall terminate and cease to be outstanding. The
unvested  portion of this option shall  terminate on the date Optionee ceases to
remain in Service.

                           (ii) Should  Optionee  die while in Service or within
the thirty (30)-day period  following his or her cessation of Service,  then the
personal  representative  of the  Optionee's  estate or the person or persons to
whom this option is transferred pursuant to the Optionee's will or in accordance
with the laws of descent and  distribution  shall have the right to exercise the
option.  Such right shall lapse,  and this option shall  terminate  and cease to
remain  exercisable,  upon  the  earlier  of (A) the  expiration  of the  twelve
(12)-month  period  measured  from  the  date  of  Optionee's  death  or (B) the
Expiration Date.

                           (iii) Should Optionee become permanently disabled and
cease by reason thereof to remain in Service at any time during the option term,
then the vested option of this option shall not remain exercisable for more than
a twelve  (12)  month  period  commencing  with the  date of such  cessation  of
Service.  Upon the  expiration of such limited period of  exercisability  or (if
earlier)  upon the  Expiration  Date,  the vested  portion of this option  shall
terminate and cease to be outstanding. The unvested portion of this option shall
terminate on the date Optionee ceases to remain in Service.


                           (iv) Should (A) the Optionee's  Service be terminated
for misconduct  (including,  but not limited to, any act of dishonesty,  willful
misconduct, fraud or embezzlement) or (B) the Optionee make any unauthorized use
or disclosure of confidential information or trade secrets of the Corporation or
its parent or subsidiary corporations,  then in any such event this option shall
terminate immediately and cease to be exercisable.  The unvested portion of this
option shall terminate on the date Optionee ceases to remain in Service.

                           (v) In no event shall this option be  exercisable  at
any time after the specified Expiration Date of the option term.



<PAGE>

                           (vi)  During  the  limited   post-Service  period  of
exercisability  determined in accordance  with  subparagraphs  (i) through (iii)
above,  this  option  may not be  exercised  for more than the  number of Option
Shares  (if  any) for  which  this  option  is,  at the  time of the  Optionee's
cessation of Service,  exercisable in accordance with either the normal exercise
provisions specified in the Grant Notice or the special acceleration  provisions
of  Paragraph  7 of  this  Agreement.  However,  should  Optionee's  Service  be
terminated by reason of death,  then this option may also be  exercised,  during
the applicable  period of  exercisability  provided under  subparagraph  (ii) or
(iii) above, for any or all additional Option Shares for which this option would
have otherwise become  exercisable had the Optionee continued in Service through
the last date of the installment  exercise schedule specified for this option in
the Grant Notice. Upon Optionee's cessation of Service for any reason other than
death, this option shall immediately  terminate and cease to be outstanding with
respect to any Option Shares for which this option is not otherwise at that time
exercisable.

                           (vii) For  purposes  of this  Paragraph 5 and for all
other  purposes  under this  Agreement,  the following  definitions  shall be in
effect:

                                    (A) The  Optionee  shall be deemed to remain
                           in the Service of the Corporation for so long as such
                           individual  renders  services on a periodic  basis to
                           the   Corporation   (or  any  parent  or   subsidiary
                           corporation)  in  the  capacity  of  an  Employee,  a
                           non-employee  member of the  Board or an  independent
                           consultant or advisor.

                                     (B) The  Optionee  shall be deemed to be an
                           Employee  for so long as such  individual  remains in
                           the employ of the  Corporation  or one or more of its
                           parent or  subsidiary  corporations,  subject  to the
                           control and  direction of the employer not only as to
                           the work to be  performed  but also as to the  manner
                           and method of performance.

                                    (C)  The  Optionee  shall  be  deemed  to be
                           permanently  disabled  or have  incurred a  permanent
                           disability  if the  Optionee  is,  by  reason  of any
                           medically  determinable physical or mental impairment
                           expected  to result  in death or to be of  continuous
                           duration  of not less than  twelve  (12)  consecutive
                           months or more,  unable to engage in any  substantial
                           gainful activity.

                                    (D)  Each   corporation   (other   than  the
                           Corporation)  in an  unbroken  chain of  corporations
                           beginning with the Corporation shall be considered to
                           be a subsidiary  of the  Corporation,  provided  each
                           such corporation (other than the last corporation) in
                           the  unbroken   chain  owns,   at  the  time  of  the
                           determination,  stock  possessing fifty percent (50%)
                           or more of the  total  combined  voting  power of all
                           classes of stock in one of the other  corporations in
                           such chain.

                                    (E)  Any   corporation   (other   than   the
                           Corporation)  in an  unbroken  chain of  corporations
                           ending with the Corporation shall be considered to be
                           a parent  corporation  of the  Corporation,  provided
                           each such  corporation  in the unbroken  chain (other
                           than  the  Corporation)  owns,  at  the  time  of the
                           determination,  stock  possessing fifty percent (50%)
                           or more of the  total  combined  voting  power of all
                           classes of stock in one of the other  corporations in
                           such chain.

                                    (F) An  unpaid  leave of  absence  which has
                           been authorized by the Plan  Administrator in writing
                           shall  not   constitute  a  cessation  of  Optionee's
                           Service,  provided Optionee returns to active Service
                           on or prior to the authorized expiration date of such
                           leave.



<PAGE>

                  6.  Adjustment in Option Shares.  Should any change be made to
the Common Stock by reason of any stock split, stock dividend, recapitalization,
combination  of  shares,  exchange  of  shares  or other  change  affecting  the
outstanding  Common  Stock  as a class  without  the  Corporation's  receipt  of
consideration,  appropriate  adjustments  shall be made to (i) the total  number
and/or class of  securities  subject to this option and (ii) the Option Price in
order to reflect such change and thereby  preclude a dilution or  enlargement of
benefits hereunder.

                  7.  Corporate Transaction.

                           (a) In the  event  of one or  more  of the  following
stockholder-approved transactions (a "Corporate Transaction"):

                                     (i) a merger  or  acquisition  in which the
Corporation is not the surviving entity,  except for a transaction the principal
purpose of which is to change the State of the Corporation's incorporation,

                                     (ii)   the   sale,    transfer   or   other
disposition of all or substantially all of the assets of the Corporation or

                                     (iii)  any  reverse  merger  in  which  the
Corporation is the surviving entity,

                      this option,  to the extent  outstanding  at such time but
not otherwise  fully  exercisable  for all the Option Shares (in accordance with
the  installment  exercise  schedule  set  forth  in  the  Grant  Notice  or the
provisions of Paragraph 5 above),  shall  automatically  accelerate so that such
option shall,  during the five (5) business day period  immediately prior to the
specified effective date for the Corporate Transaction, become fully exercisable
with  respect  to all the  Option  Shares  and may be  exercised  for all or any
portion of those shares as  fully-vested  shares.  No such  acceleration of this
option,  however, shall occur if and to the extent this option is, in connection
with  the  Corporate  Transaction,   either  to  be  assumed  by  the  successor
corporation  or  parent  thereof  or be  replaced  with a  comparable  option to
purchase  shares of the capital  stock of the  successor  corporation  or parent
thereof.  The  determination of option  comparability  shall be made by the Plan
Administrator, and such determination shall be final, binding and conclusive.

                           (b) Immediately following the Corporate  Transaction,
this option shall  terminate and cease to be  outstanding,  except to the extent
assumed by the successor  corporation (or parent thereof) in connection with the
Corporate Transaction. The Corporation shall use its best efforts to (i) provide
the Optionee with at least ten (10) days prior  written  notice of the specified
effective date for the Corporate Transaction and (ii) have the option assumed by
the successor  corporation or its parent company, to the extent not exercised in
connection with such Corporate Transaction.

                           (c) If this  option is assumed in  connection  with a
Corporate  Transaction,  then  this  option  shall  be  appropriately  adjusted,
immediately after such Corporate  Transaction,  to apply to the number and class
of securities which would have been issuable to Optionee in consummation of such
Corporate  Transaction had the option been exercised  immediately  prior to such
Corporate  Transaction,  and appropriate  adjustments  shall also be made to the
Exercise Price, provide the aggregate Exercise Price shall remain the same.

                           (d) This  Agreement  shall not in any way  affect the
right of the Corporation to adjust,  reclassify,  reorganize or otherwise change
its capital or business structure or to merge, consolidate,  dissolve, liquidate
or sell or transfer all or any part of its business or assets.



<PAGE>

                  8.  Privilege  of Stock  Ownership.  The holder of this option
shall not have any of the  rights of a  stockholder  with  respect to the Option
Shares until such individual  shall have exercised the option in accordance with
the  provisions of Paragraph 9, paid the Option Price for the  purchased  shares
and been issued a stock certificate for such shares.

                  9.  Manner of Exercising Option.

                           (a) In order to exercise  this option with respect to
all or any part of the  Option  Shares  for  which  this  option  is at the time
exercisable,  Optionee (or in the case of exercise after  Optionee's  death, the
Optionee's  executor,  administrator,  heir or legatee, as the case may be) must
take the following actions:

                                     (i) Deliver (A) an executed notice of stock
option  exercise  (the  "Exercise  Notice")  to the Stock  Administrator  of the
Corporation  in which  there is  specified  the  number of  Option  Shares to be
purchased under the exercised option and (B) any additional  documents which the
Plan Administrator may, in its discretion, deem advisable.

                                     (ii) Pay the aggregate Option Price for the
purchased shares through one or more of the following alternatives:

                                            (A)  payment  in  cash  or by  check
payable to the Corporation's order;

                                            (B)  payment  in  shares  of  Common
Stock of the  Corporation  held by the Optionee (or any other person  exercising
this  option)  for the  requisite  period  necessary  to avoid a  charge  to the
Corporation's  earnings  for  financial  reporting  purposes  and valued at Fair
Market Value on the Exercise Date (as such terms are defined below);

                                            (C)  payment   effected   through  a
broker-dealer sale and remittance procedure pursuant to which the Optionee shall
provide  irrevocable  written  instructions  (I)  to  a   Corporation-designated
brokerage firm to effect the immediate sale of the purchased shares and remit to
the Corporation,  out of the sale proceeds  available on the settlement date, an
amount equal to the aggregate Option Price payable for the purchased shares plus
all  applicable  Federal and State income and  employment  taxes  required to be
withheld  by the  Corporation  by  reason  of  such  purchase  and  (II)  to the
Corporation to deliver the  certificates  for the purchased  shares  directly to
such brokerage firm in order to complete the sale transaction.

                                     (iii)    Furnish    to   the    Corporation
appropriate  documentation  that the person or persons exercising the option, if
other than Optionee, have the right to exercise this option.

                           (b) For purposes of subparagraph  9(a) above (and all
other valuation purposes  hereunder),  the Fair Market Value per share of Common
Stock on any relevant date shall be determined in accordance with  subparagraphs
(i) and (ii)  below,  and the  Exercise  Date  shall  be the  date on which  the
following  documents  shall  have  been  delivered  to the  Corporation  (I) the
Exercise  Notice and any  additional  documents  required by the  Corporation in
connection  with the  option  exercise  and (II) any  representations  which the
Corporation  may require of the Optionee in order to comply with the  applicable
requirements of Federal and State securities laws.

                                     (i)  If the  Common  Stock  is at the  time
traded on the Nasdaq  National  Market,  then the Fair Market Value shall be the
closing  selling price per share of Common Stock on the day prior to the date in
question,  as such price is reported by the National  Association  of Securities
Dealers on the Nasdaq  National Market or any successor  system.  If there is no
closing  selling  price  for the  Common  Stock on the day  prior



<PAGE>

to the date in question, then the Fair Market Value shall be the closing selling
price on the last preceding date for which such quotation exists.

                                     (ii) If the  Common  Stock  is at the  time
listed on either the New York Stock  Exchange or the  American  Stock  Exchange,
then the Fair  Market  Value  shall be the  closing  selling  price per share of
Common Stock on the day prior to the date in question on such exchange,  as such
price  is  officially  quoted  on the  composite  tape of  transactions  on that
exchange.  If there is no closing  selling price for the Common Stock on the day
prior to the date in  question,  then the Fair Market Value shall be the closing
price on the last preceding date for which such quotation exists.

                           (c)  This  option   shall  be  deemed  to  have  been
exercised with respect to the number of Option Shares  specified in the Exercise
Notice at such time as the  Exercise  Notice  shall have been  delivered  to the
Corporation.  Except to the extent the special  payment  procedure  specified in
clause (C) of Paragraph 9 is used,  payment of the Option Price shall  accompany
the Exercise Notice.  As soon as practical after receipt of the Exercise Notice,
the Corporation shall mail or deliver (including by electronic  transmission) to
or on behalf  of  Optionee  (or his  representative)  or to any other  person or
persons exercising this option in accordance herewith, appropriate documentation
evidencing ownership of the shares for which the option has been so exercised.

                           (d) In no event shall this option be exercisable  for
any fractional shares.

                  10.  Compliance with  Laws and  Regulations.  The  exercise of
this  option and the  issuance  of Option  Shares  upon such  exercise  shall be
subject to compliance by the  Corporation  and the Optionee with all  applicable
requirements of law relating thereto and with all applicable  regulations of any
stock exchange on which shares of the  Corporation's  Common Stock may be listed
at the time of such exercise and issuance.

                  11.  Successors  and Assigns.  Except to the extent  otherwise
provided in Paragraph 3 or Paragraphs 7, the provisions of this Agreement  shall
inure to the benefit of, and be binding upon,  the  successors,  administrators,
heirs and legal  representatives  of Optionee and the  successors and assigns of
the Corporation.

                  12.  Liability of Corporation.

                           (a) If the Option  Shares  covered by this  Agreement
exceed,  as of the Grant Date,  the number of shares which may without  Board of
Directors'  approval be issued  under the Plan,  then this option  shall be void
with respect to such excess  shares  unless Board of  Directors'  approval of an
amendment  sufficiently  increasing the number of shares issuable under the Plan
is obtained in accordance with the provisions of the Plan.

                           (b)  The  inability  of  the  Corporation  to  obtain
approval from any regulatory body having  authority deemed by the Corporation to
be  necessary to the lawful  issuance  and sale of any Common Stock  pursuant to
this option shall relieve the  Corporation  of any liability with respect to the
non-issuance  or sale of the Common  Stock as to which such  approval  shall not
have been obtained.

                  13.  No Employment/Service  Contract. Except to the extent the
terms of any  employment  or  other  service  contract  with  the  Optionee  may
expressly  provide  otherwise,  nothing in this  Agreement  or in the Plan shall
confer upon Optionee any right to continue in Service for any period of specific
duration or interfere  with or  otherwise  restrict in any way the rights of the
Corporation (or any parent or subsidiary  employing or retaining Optionee) or of
Optionee,  which  rights are hereby  expressly  reserved by each,  to  terminate
Optionee's Service at any time for any reason, with or without cause.

                  14.  Notices.  Any notice required to be given or delivered to
the  Corporation  under  the terms of this  Agreement  shall be in  writing  and
addressed to the Corporation in care of its Stock Administrator at its



<PAGE>

corporate  offices.  Any notice  required to be given or  delivered  to Optionee
shall be in writing and  addressed  to Optionee  at the  address  indicated  for
Optionee on the Corporation's books and records.  All notices shall be deemed to
have been given or delivered upon personal  delivery or upon deposit in the U.S.
mail, postage prepaid and properly addressed to the party to be notified.

                  15.  Construction.  This  Agreement  and the option  evidenced
hereby are made and granted pursuant to the Plan and are in all respects limited
by and subject to the express terms and provisions of the Plan. All decisions of
the Plan  Administrator  with respect to any question or issue arising under the
Plan or this Agreement  shall be conclusive and binding on all persons having an
interest in this option.

                  16.  Governing  Law.  The   interpretation,  performance,  and
enforcement  of this  Agreement  shal l be governed  by the laws of the State of
California.

                  17.  Withholding.  Optionee hereby agrees to make  appropriate
arrangements  with the  corporation  employing  or  retaining  Optionee  for the
satisfaction of any federal, state or local income tax withholding  requirements
and federal  social  security  employment  tax  requirements  applicable  to the
exercise of this option.



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