KOMAG INC /DE/
S-8, 1995-09-12
MAGNETIC & OPTICAL RECORDING MEDIA
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As filed with the Securities and Exchange Commission on September 8, 1995
                                         Registration No. 33-____________

               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)

          275 SOUTH HILLVIEW DRIVE, MILPITAS, CA 95035
       (Address of principal executive offices) (Zip Code)

                    ________________________

                   KMT 1995 STOCK OPTION PLAN
                    (Full title of the Plan)

                    ________________________

                       STEPHEN C. JOHNSON
              PRESIDENT AND CHIEF EXECUTIVE OFFICER
                       KOMAG, INCORPORATED
          275 SOUTH HILLVIEW DRIVE, MILPITAS, CA 95035
             (Name and address of agent for service)
                         (408) 946-2300
  (Telephone number, including area code, of agent for service)


                 CALCULATION OF REGISTRATION FEE


<TABLE>
<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>    

Options to Purchase Common                 60,000               N/A                N/A                   N/A
Stock, $0.01 par value

Common Stock,                           60,000 shares       $64.9375            $3,896,250.00        $1,343.53
$0.01 par value

<FN>

(1)      This   Registration   Statement  shall  also  cover  any
         additional  shares of Common Stock which become issuable
         under the KMT 1995  Stock  Option  Plan by reason of any
         stock  dividend,  stock split,  recapitalization  or any
         other similar  transaction  effected without the receipt
         of  consideration  which  results in an  increase in the
         number of  outstanding  shares of Common Stock of Komag,
         Incorporated.

(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 selling
         prices per share of Common Stock of Komag,  Incorporated
         on September 5, 1995, as reported on the Nasdaq National
         Market.

</FN>
</TABLE>

                           TOTAL PAGES  5

                      EXHIBIT INDEX ON PAGE II-2




<PAGE>



                             PART II

       INFORMATION REQUIRED IN THE REGISTRATION STATEMENT



Item 3.  Incorporation of Certain Documents by Reference

     Komag,  Inc.  (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 1, 1995, as amended by Amendment No. 1
thereto, filed with the SEC on March 13, 1995;

     b. The Registrant's  Quarterly  Reports on Form 10-Q for the
fiscal  quarters  ended May 4, 1995 and July 2, 1995,  filed with
the SEC on May 11, 1995 and July 19, 1995, respectively; and

     c. The  Registrant's  Registration  Statement No. 0-16852 on
Form 8-A filed with the SEC on April 29,  1988 in which  there is
described  the terms,  rights and  provisions  applicable  to the
Registrant's outstanding Common Stock.

         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.


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 the  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.


<PAGE>


         Pursuant to the provisions of Section 145 of the General
Corporation Law of Delaware, every 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  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 unless the court, in its discretion, feels that in the
light of all the circumstances indemnification should apply.

         To the extent any of the persons  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

Exhibit Number        Exhibit

     5                Opinion of Brobeck, Phleger & Harrison.
    23.1              Consent of Independent Auditors - Ernst & Young LLP.
    23.2              Consent of Brobeck, Phleger & Harrison is contained
                      in Exhibit 5.
    24                Power of Attorney.  Reference is made to page II-4
                      of this Registration Statement.
    99.1              KMT 1995 Stock Option Plan.
    99.2              Form of Notice of Grant of Stock Option.
    99.3              Form of Stock Option Agreement (Employees/Consultants).
    99.4              Form of Stock Option Agreement (Officers).


                              II-2


<PAGE>


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 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 KMT 1995 Stock Option 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.

                              II-3




<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 Milpitas,
State of California, on this 5th day of September, 1995.

                                       KOMAG, INCORPORATED


                                       By: /s/Stephen C. Johnson
                                           ---------------------
                                           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.

                  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.

Signatures                   Title                         Date


/s/Stephen C. Johnson        President, Chief Executive    September 5, 1995
---------------------        Officer and Director 
Stephen C. Johnson           (Principal Executive Officer)

                              II-4



<PAGE>



Signatures                   Title                          Date



/s/Tu Chen                   Chairman of the Board          September 5, 1995
------------------------                                      



/s/William L. Potts, Jr.     Vice President of Finance,     September 5, 1995
------------------------     Chief Financial Officer and
William L. Potts, Jr.        Secretary (Principal Financial
                             and Accounting Officer)



/s/Craig R. Barrett          Director                       September 5, 1995
------------------------   
Craig R. Barrett



/s/Chris A. Eyre             Director                       September 5, 1995
------------------------   
Chris A. Eyre



/s/Irwin Federman            Director                        September 5, 1995
------------------------   
Irwin Federman



/s/George A. Neil            Director                        September 5, 1995
------------------------   
George A. Neil



/s/ Max Palevsky             Director                        September 5, 1995
------------------------   
Max Palevsky



/s/Anthony Sun               Director                        September 5, 1995
------------------------   
Anthony Sun



/s/Masayoshi Takebayashi     Director                        September 5, 1995

------------------------   
Masayoshi Takebayashi


                              II-5




<PAGE>



               SECURITIES AND EXCHANGE COMMISSION
                     WASHINGTON, D.C. 20549


                            EXHIBITS

                               TO

                            FORM S-8

                              UNDER

                     SECURITIES ACT OF 1933


                       KOMAG, INCORPORATED



<PAGE>



                          EXHIBIT INDEX


                                                         Sequentially Numbered
    Exhibit No.                      Exhibit                              Page

     5                Opinion of Brobeck, Phleger & Harrison.
    23.1              Consent of Independent Auditors - Ernst & Young LLP.
    23.2              Consent of Brobeck, Phleger & Harrison is contained
                      in Exhibit 5.
    24                Power of Attorney.  Reference is made to page II-4
                      of this Registration Statement.
    99.1              KMT 1995 Stock Option Plan.
    99.2              Form of Notice of Grant of Stock Option.
    99.3              Form of Stock Option Agreement (Employees/Consultants).
    99.4              Form of Stock Option Agreement (Officers).






                            EXHIBIT 5

             Opinion of Brobeck, Phleger & Harrison

                        September 7, 1995


KOMAG, INCORPORATED
275 South Hillview Drive
Milpitas, California 95035

     RE:      KOMAG, INCORPORATED -- REGISTRATION STATEMENT FOR
              OFFERING OF 60,000 SHARES OF COMMON STOCK

Ladies and Gentlemen:

                  We refer to your  registration on Form S-8 (the
"Registration  Statement")  under the  Securities Act of 1933, as
amended,   of  60,000  shares  of  the  Common  Stock  of  Komag,
Incorporated  (the  "Company")  authorized for issuance under the
KMT 1995 Stock Option Plan (the  "Plan").  We advise you that, in
our opinion,  when such shares have been issued and sold pursuant
to  the  provisions  of  the  Plan  and in  accordance  with  the
Registration Statement, such shares will be validly issued, fully
paid and nonassessable shares of the Company's Common Stock.

                  We   hereby    consent   to   the    filing  of
this opinion as an exhibit to the Registration Statement.

                                   Very truly yours,




                                   BROBECK, PHLEGER & HARRISON



<PAGE>








                          EXHIBIT 23.1

       Consent of Independent Auditors - Ernst & Young LLP


                 CONSENT OF INDEPENDENT AUDITORS


We consent to the  incorporation by reference in the Registration
Statements   (Form  S-8)   pertaining   to  the  Komag   Material
Technology, Inc. Stock Option Plan of our report dated January 31, 
1995,  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 1, 1995,  filed with the
Securities and Exchange Commission.



                                  ERNST & YOUNG LLP



San Jose, California
September 5, 1995



<PAGE>







                          EXHIBIT 23.2

Consent of Brobeck, Phleger & Harrison is contained in Exhibit 5.




<PAGE>



                           EXHIBIT 24

Power of Attorney.  Reference is made to page II-4 of this 
Registration Statement.







                          EXHIBIT 99.1

                   KMT 1995 Stock Option Plan





                 KOMAG MATERIAL TECHNOLOGY, INC.
                     1995 STOCK OPTION PLAN


                           ARTICLE ONE

                       GENERAL PROVISIONS


        I.        PURPOSE OF THE PLAN

                  This 1995  Stock  Option  Plan is  intended  to
promote the  interests  of Komag  Material  Technology,  Inc.,  a
Delaware corporation,  by providing eligible individuals with the
opportunity  to  acquire a  proprietary  interest,  or  otherwise
increase their proprietary interest, in Komag, Incorporated,  the
Corporation's  parent company,  through  long-term  option grants
designed  to  provide  them with  incentive  to  continue  in the
Corporation's  service and contribute to the financial success of
both the Corporation and Komag, Incorporated.

                  Capitalized  terms   shall  have  the  meanings    
assigned to such terms in the attached Appendix.

       II.        ADMINISTRATION OF THE PLAN

                  A.       The   Plan   shall   be   administered   
by the Compensation Committee of the Board. Members of the
Committee shall 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   Compensation   Committee   as   Plan
Administrator shall have full power and authority (subject to the
provisions of the Plan) to establish  such rules and  regulations
as it may deem appropriate for proper  administration of the Plan
and  to  make  such   determinations   under,   and  issue   such
interpretations   of,  the   provisions   of  the  Plan  and  any
outstanding  options  thereunder  as it  may  deem  necessary  or
advisable. Decisions of the Plan Administrator shall be final and
binding on all parties who have an interest in the Plan.

                  C.   Service   as  Plan   Administrator   shall
constitute  service  as  a  Board  member,  and  members  of  the
Compensation  Committee  shall  accordingly  be  entitled to full
indemnification  and  reimbursement  as Board  members  for their
service  as the Plan  Administrator.  No member of the  Committee
shall be liable for any act or  omission  made in good faith with
respect to the Plan or any option grants thereunder.


                               2.



<PAGE>



      III.        ELIGIBILITY

                  A.  The persons eligible  to  receive   option   
grants    under   the   Plan   are  as follows:

                       (i)   Employees, and

                       (ii)  consultants  or  other   independent
         advisors who provide services to the Corporation (or any 
         Subsidiary).

                  B.  The  Plan  Administrator  shall  have  full
authority  to  determine  which  eligible  persons are to receive
option  grants,  the time or times when such option grants are to
be made,  the number of shares to be covered by each such  grant,
the time or times at which each option is to become  exercisable,
the vesting schedule (if any) applicable to the option shares and
the maximum term for which the option is to remain outstanding.

       IV.        STOCK SUBJECT TO THE PLAN

                  A. The stock  issuable  under the Plan shall be
shares  of  Komag  Stock,  acquired  by the  Corporation  through 
(i) direct purchase  from Komag  or  (ii) purchase  on  the  open 
market.  The maximum number of shares of Komag Stock which may be
issued over the term of the Plan shall not exceed Sixty  Thousand
(60,000) shares.

                  B. Shares of Komag Stock subject to outstanding
options under the Plan shall be available for subsequent issuance
under the Plan to the extent (i) the options  expire or terminate
for any reason  prior to exercise in full or (ii) the options are
cancelled in accordance with the cancellation-regrant  provisions
of Article Two. All shares issued under the Plan,  whether or not
those  shares are  subsequently  repurchased  by the  Corporation
pursuant to its repurchase rights under the Plan, shall reduce on
a  share-for-share  basis the  number  of  shares of Komag  Stock
available for  subsequent  issuance  under the Plan. In addition,
should  the  exercise  price of an option  under the Plan be paid
with  shares of Komag  Stock,  then the number of shares of Komag
Stock  available for issuance  under the Plan shall be reduced by
the gross number of shares for which the option is exercised, and
not by the net  number  of shares  of Komag  Stock  issued to the
holder of such option.

                  C. Should any change be made to the Komag Stock
by reason of any stock split,  stock dividend,  recapitalization,
combination  of  shares,  exchange  of  shares  or  other  change
affecting the outstanding  Komag Stock,  appropriate  adjustments
shall  be  made  to  (i)  the  maximum  number  and/or  class  of
securities  issuable  under the Plan and (ii) the  number  and/or
class of  securities  and the exercise  price per share in effect
under each outstanding option in order to prevent the dilution or
enlargement of benefits thereunder. The adjustments determined by
the Plan Administrator shall be final, binding and conclusive.

                               2.



<PAGE>



                           ARTICLE TWO

                      OPTION GRANT PROGRAM


        I.        OPTION TERMS

                  Each option  shall be  evidenced by one or more
documents  in  the  form  approved  by  the  Plan  Administrator;
provided,  however, that each such document shall comply with the
terms specified  below.  All options granted under the Plan shall
be Non-Statutory Options.

                  A.       EXERCISE PRICE.

                           1.       The    exercise    price  per
share shall be fixed by the Plan  Administrator  but shall not be
less than eighty-five  percent (85%) of the Fair Market Value per
share of Komag Stock on the option grant date.

                           2.       The   exercise   price   shall
become  immediately  due upon  exercise  of the option and shall,
subject to the  provisions  of Section I of Article Three and the
documents evidencing the option, be payable in one or more of the
forms specified below:

                                  (i)       cash  or  check  made 
         payable to the Corporation,

                                 (ii)       shares    of    Komag    
         Stock held for the requisite period necessary to avoid a
         charge  to  either the Corporation's or Komag's earnings
         for  financial  reporting  purposes  and  valued at Fair
         Market Value on the Exercise Date, or

                                (iii)       through   a   special
         sale  and  remittance  procedure  pursuant  to which the 
         Optionee   shall   concurrently    provide   irrevocable
         instructions to (a) 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,  sufficient
         funds to cover the aggregate  exercise price payable for
         the purchased shares plus all applicable Federal,  state
         and local  income and  employment  taxes  required to be
         withheld by the  Corporation  by reason of such exercise
         and (b) the Corporation to deliver the  certificates for
         the purchased  shares directly to such brokerage firm in
         order to complete the sale transaction.

                  Except to the extent  such sale and  remittance
procedure  is  utilized,  payment of the  exercise  price for the
purchased shares must be made on the Exercise Date.



                               3.



<PAGE>



               B. EXERCISE AND TERM OF OPTIONS. Each option 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  documents  evidencing  the
option.  However,  no option  shall  have a term in excess of ten
(10) years measured from the option grant date.

               C. EFFECT OF TERMINATION OF SERVICE.

                    1.  The following provisions shall govern the
exercise of any options  held by the  Optionee at the time of his
or her cessation of Service or death.

                                  (i)       Upon  the  Optionee's
          cessation  of Service for any reason  other than death,
          the  Optionee  shall not have more than a twelve  (12)-
          month period (or such shorter period  determined by the
          Plan  Administrator  and  set  forth  in the  agreement
          evidencing  such  option)  following  the  date of such
          cessation  of Service in which to  exercise  his or her
          outstanding  options,  but in no  event  may  any  such
          option be exercised after the specified expiration date
          of the option term.

                                 (ii)       Any  option  exercis-
          able in whole or in part by the Optionee at the time of
          death may be  subsequently  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.  However,  the
          right to exercise  such  option  shall  lapse,  and the
          option shall cease to be outstanding,  upon 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.

                                (iii)       During   the   appli-
          cable post-Service  exercise period, the option may not
          be exercised in the  aggregate for more than the number
          of shares  for which the option is  exercisable  on the
          date of the Optionee's  cessation of Service.  Upon the
          expiration  of the  applicable  exercise  period or (if
          earlier) upon the  expiration  of the option term,  the
          option shall  terminate and cease to be outstanding for
          any  exercisable  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 or all
          shares  for which the option is not  otherwise  at that
          time exercisable.

                                 (iv)       Should the Optionee's
         Service  be   terminated   for   Misconduct,   then  all
         outstanding options held by the Optionee shall terminate
         immediately and cease to be outstanding.



                               4.



<PAGE>



               2.  The Plan  Administrator  shall  have  complete
discretion,  exercisable  either at the time an option is granted
or at any time while the option remains outstanding, to:

                           - extend  the period of time for which
         the  option  is  to  remain  exercisable  following  the
         Optionee's  cessation  of  Service  from  the  specified
         post-Service  exercise  period  otherwise  in effect for
         that option to such  greater  period of time as the Plan
         Administrator  shall deem  appropriate,  but in no event
         beyond the expiration of the option term, and/or

                           - permit the  option to be  exercised,
         during the applicable  post-Service exercise period, not
         only with respect to the number of shares of Komag Stock
         for which such option is  exercisable at the time of the
         Optionee's cessation of Service but also with respect to
         one or more additional installments for which the option
         would have become exercisable had the Optionee continued
         in Service.

               D.  STOCKHOLDER  RIGHTS.  The  holder of an option
shall have no  stockholder  rights with  respect to the shares of
Komag Stock  subject to the option  until such person  shall have
exercised the option, paid the exercise price and become a holder
of record of the purchased shares.

               E. REPURCHASE RIGHTS. The Plan Administrator shall
have the  discretion to grant options which are  exercisable  for
unvested shares of Komag Stock. Should the Optionee cease Service
while holding such unvested  shares,  the Corporation  shall have
the right to  repurchase,  at the exercise  price paid per share,
any or all of those  unvested  shares.  The terms 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  document  evidencing  such
repurchase right.

               F. 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  other
than by will or by the laws of descent and distribution following
the Optionee's death.

       II.        CORPORATE TRANSACTION

                  A.  In  the   event   of  any   KMT   Corporate
Transaction,  each outstanding option under the Plan shall either
be assumed by the successor  corporation  (or parent  thereof) or
replaced  with a  comparable  option  to  purchase  shares of the
capital stock of the successor  corporation (or parent  thereof).
In addition,  all repurchase rights outstanding under the Plan at
the time of the KMT  Corporate  Transaction  shall be assigned to
the successor  corporation (or parent thereof) in connection with
such Corporate Transaction.

                               5.


<PAGE>

                  B.  (i) In the  event  of any  Komag  Corporate
Transaction,   each  outstanding  option  under  the  Plan  shall
automatically  accelerate so that each such option shall, for the
five (5) business days immediately prior to the effective date of
the Corporate  Transaction,  become fully exercisable for all the
shares of Komag Stock at the time  subject to such option and may
be  exercised  for any or all of  those  shares  as  fully-vested
shares of Komag Stock.  However,  an outstanding option shall not
so  accelerate  if and to the  extent:  

                                (i)    such   option    is,    in
connection  with the Komag  Corporate  Transaction,  either to be
assumed by the successor corporation (or parent thereof) or to 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 the
option grant.  The  determination of option  comparability  under
clause (i) above shall be made by the Plan Administrator, and its
determination shall be final, binding and conclusive.

                                (ii)        All repurchase rights
outstanding  under  the Plan at the time of the  Komag  Corporate
Transaction shall also terminate automatically, and the shares of
Komag  Stock  subject to those  terminated  rights  shall vest in
full,  immediately  prior to the  consummation  of such Corporate
Transaction,  except to the extent:  (i) those repurchase  rights
are  to be  assigned  to the  successor  corporation  (or  parent
thereof) in connection  with the Komag  Corporate  Transaction or
(ii) such accelerated  vesting is precluded by other  limitations
imposed  by the Plan  Administrator  at the  time the  repurchase
right is issued.

                               (iii)        Immediately following
the  consummation  of  any  Komag  Corporate   Transaction,   all
outstanding  options under the Plan shall  terminate and cease to
be  outstanding,  except to the extent  assumed by the  successor
corporation (or parent thereof).

                  C. Each option  which is assumed in  connection
with a KMT or Komag Corporate  Transaction shall be appropriately
adjusted,  immediately after such Corporate Transaction, to apply
to the  number  and class of  securities  which  would  have been
issuable  to the  Optionee  in  consummation  of  such  Corporate
Transaction  had the option been exercised  immediately  prior to
such Corporate Transaction. Appropriate adjustments shall also be
made to (i) the  number  and class of  securities  available  for
issuance  under  the  Plan  following  the  consummation  of such
Corporate  Transaction  and (ii) the exercise  price  payable per
share  under each  outstanding  option,  provided  the  aggregate
exercise price payable for such securities shall remain the same.

                  D. The grant of options  shall in no way affect
the  right of the  Corporation  or Komag 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.

                               6.


<PAGE>


      III.        CANCELLATION AND REGRANT OF OPTIONS

                  The Plan Administrator shall have the authority
to effect, at any time and from time to time, with the consent of
the  affected  option  holders,  the  cancellation  of any or all
outstanding  options under the Plan and to grant in  substitution
new options  covering the same or  different  number of shares of
Komag  Stock but with an  exercise  price per share  based on the
Fair  Market  Value  per share of Komag  Stock on the new  option
grant date.

                               7.

<PAGE>


                          ARTICLE THREE

                          MISCELLANEOUS


        I.        FINANCING

                  The Plan  Administrator may permit any Optionee
to pay the option  exercise price by delivering a promissory note
payable  in one or  more  installments.  The  terms  of any  such
promissory  note  (including  the interest  rate and the terms of
repayment) shall be established by the Plan  Administrator in its
sole  discretion.  Promissory  notes  may be  authorized  with or
without security or collateral. In all events, the maximum credit
available  to the  Optionee  may  not  exceed  the sum of (i) the
aggregate  option exercise price payable for the purchased shares
plus (ii) any Federal,  state and local income and employment tax
liability  incurred by the Optionee in connection with the option
exercise.

       II.        TAX WITHHOLDING

                  The Corporation's  obligation to deliver shares
of Komag Stock upon the exercise of options  under the Plan shall
be subject to the satisfaction of all applicable  Federal,  state
and local income and employment tax withholding requirements.

      III.        EFFECTIVE DATE AND TERM OF PLAN

                  A. The Plan shall become effective  immediately
upon adoption by the Board. However, no options granted under the
Plan may be exercised until the Plan is approved by Komag, acting
through  the  Komag   Board,   as  the   Corporation's   majority
stockholder.  Should such approval not be obtained  within twelve
(12)  months  after  the  date  of  adoption,  then  all  options
previously  granted under this Plan shall  terminate and cease to
remain  outstanding,  and no further  option grants shall be made
under the Plan.

                  B. The Plan shall terminate upon the earlier of
(i) May 31,  2005 or (ii) the date on which all shares  available
for  issuance  under the Plan shall have been issued  pursuant to
the  exercise  of the  options  under  the  Plan.  If the date of
termination is determined under clause (i) above, then all option
grants outstanding on such date shall thereafter continue to have
force  and  effect  in  accordance  with  the  provisions  of the
documents evidencing such grants.

       IV.        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.  However,  no  such  amendment  or  modification  shall
adversely  affect  the  rights and  obligations  with  respect to
options  at the  time  outstanding  under  the  Plan  unless  the
Optionee consents to such amendment or

                               8.



<PAGE>


modification.   In    addition,   any   amendment   which   would  
(i) materially  increase the maximum  number of shares of   Komag 
Stock issuable under the Plan, except for permissible adjustments
in  the   event  of   certain   changes   in  the   Corporation's
capitalization,    (ii)   materially   modify   the   eligibility
requirements for Plan participation or (iii) materially  increase
the  benefits  accruing to Plan  participants  shall  require the
approval of Komag, acting through the Komag Board, if Komag is at
the time the Corporation's majority stockholder.

        V.        USE OF PROCEEDS

                  Any cash proceeds  received by the  Corporation
from the sale of shares of Komag  Stock  under the Plan  shall be
used for general corporate purposes.

       VI.        REGULATORY APPROVALS

                  A. The implementation of the Plan, the granting
of any option and the  issuance of any shares of Komag Stock upon
the exercise of any option shall be subject to the procurement by
both the  Corporation  and  Komag of all  approvals  and  permits
required by regulatory  authorities having  jurisdiction over the
Plan,  the options and the shares of Komag Stock issued  pursuant
to it.

                  B. No  shares  of Komag  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 Komag Stock issuable under the Plan, and all applicable
listing  requirements  of  any  stock  exchange  (or  the  Nasdaq
National  Market,  if  applicable)  on which  Komag Stock is then
listed for trading.

      VII.        NO EMPLOYMENT/SERVICE RIGHTS

                  Nothing  in the  Plan  shall  confer  upon  the
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 Subsidiary employing or
retaining  such  person)  or of the  Optionee,  which  rights are
hereby  expressly  reserved by each,  to terminate  such person's
Service at any time for any reason, with or without cause.


                               9.



<PAGE>



                            APPENDIX


                  The  following  definitions  shall be in effect
under the Plan:

                  A. BOARD shall mean the Corporation's  Board of
Directors.

                  B. CODE shall mean the Internal Revenue Code of
1986, as amended.

                  C.   CORPORATION   shall  mean  Komag  Material
Technology, Inc., a Delaware corporation.

                  D. EMPLOYEE  shall mean an individual who is in
the employ of the Corporation (or any Subsidiary), subject to the
control and direction of the employer  entity as to both the work
to be performed and the manner and method of performance.

                  E.  EXERCISE  DATE shall mean the date on which
the option is exercised either by written notice delivered to the
Corporation   or  through   the   interactive   response   system
established with a Corporation-designated brokerage firm.

                  F. FAIR  MARKET  VALUE per share of Komag Stock
on any relevant date shall be  determined in accordance  with the
following provisions:

                                 (i)        If  the   Komag 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 Komag Stock on 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 Komag Stock on 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  Komag  Stock
          is at the time listed on any Stock  Exchange,  then the
          Fair Market  Value shall be the closing  selling  price
          per share of Komag Stock on the date in question on the
          Stock Exchange  determined by the Plan Administrator to
          be the  primary  market  for the Komag  Stock,  as such
          price is  officially  quoted in the  composite  tape of
          transactions  on such exchange.  If there is no closing
          selling  price  for  the  Komag  Stock  on 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.

                  G. KMT CORPORATE  TRANSACTION shall mean any of
the following transactions to which the Corporation is a party:

                              A-1.


<PAGE>


                              (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 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.

               H.  KOMAG  shall  mean  Komag,   Incorporated,   a
Delaware corporation,  in its capacity as the owner of securities
possessing  fifty  percent  (50%) or more of the  total  combined
voting power of the Corporation's outstanding securities.

               I. KOMAG BOARD  shall mean the Board of  Directors
of Komag.

               J. KOMAG CORPORATE  TRANSACTION  shall mean any of
the following  stockholder-approved  transactions  effected while
Komag is the owner of securities  possessing  fifty percent (50%)
or more of the total combined  voting power of the  Corporation's
outstanding securities:

                                 (i)        a  merger or acquisi-
          tion in which Komag is not the surviving entity, except
          for a transaction the principal  purpose of which is to
          change the State of incorporation,

                                (ii)        the   sale,  transfer
          or other  disposition  of all or  substantially  all of
          Komag's assets, or

                               (iii)        any reverse merger in
          which Komag is the surviving entity.

               K. KOMAG STOCK  shall mean shares of Komag  common
stock.

               L. KOMAG  SUBSIDIARY  shall  mean any  corporation
(other than Komag or the  Corporation)  in an  unbroken  chain of
corporations  beginning  with Komag,  provided  each  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.

               M. MISCONDUCT shall mean the commission of any act
of  fraud,  embezzlement  or  dishonesty  by  the  Optionee,  any
unauthorized  use or  disclosure  by such person of  confidential
information  or  trade  secrets  of  the   Corporation   (or  any
Subsidiary) or Komag, or any other intentional misconduct by such
person adversely affecting the

                              A-2.



<PAGE>


business or affairs of the  Corporation  (or any  Subsidiary)  or
Komag in a material manner. The foregoing definition shall not be
deemed to be  inclusive  of all the acts or  omissions  which the
Corporation  (or any  Subsidiary) may consider as grounds for the
dismissal  or  discharge  of any  Optionee or other person in the
Service of the Corporation (or any Subsidiary).

               N. 1934 ACT shall mean the Securities Exchange Act
of 1934, as amended.

               O.  NON-STATUTORY  OPTION shall mean an option not
intended to satisfy the requirements of Code Section 422.

               P.  OPTIONEE  shall  mean  any  person  to whom an
option is granted under the Plan.

               Q. PLAN  shall mean the  Corporation's  1995 Stock
Option Plan, as set forth in this document.

               R. PLAN ADMINISTRATOR  shall mean the Compensation
Committee of the Board acting in its capacity as administrator of
the Plan.

               S. SERVICE shall mean the  Optionee's  performance
of  services  for  the  Corporation  (or any  Subsidiary)  in the
capacity of an Employee or a consultant or  independent  advisor,
except  to the  extent  otherwise  specifically  provided  in the
documents  evidencing the option grant. An Optionee shall also be
deemed to be engaged in such  Service  for any period of time the
Optionee   performs   such   services  for  Komag  or  any  Komag
Subsidiary, provided Komag is at the time the owner of securities
possessing  fifty  percent  (50%) or more of the  total  combined
voting power of the Corporation's outstanding securities.

               T. STOCK  EXCHANGE  shall mean either the  American
Stock Exchange or the New York Stock Exchange.

               U. SUBSIDIARY  shall mean any  corporation  (other
than  the  Corporation)  in an  unbroken  chain  of  corporations
beginning with the Corporation,  provided each 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.  However,
any  subsidiary  of the  Corporation  which  has  adopted a stock
option,  stock  bonus,  or  other  stock  plan  shall  not  be  a
Subsidiary for purposes of this Plan.



                              A-3.









                          EXHIBIT 99.2

             Form of Notice of Grant of Stock Option




                 KOMAG MATERIAL TECHNOLOGY, INC.
                 NOTICE OF GRANT OF STOCK OPTION

          Notice is hereby given by Komag Material Technology,
Inc. (the "Corporation") of the following option grant (the
"Option") to purchase shares of the common stock of Komag,
Incorporated ("Komag Stock"):

                  OPTIONEE:  ____________________________________

                  GRANT DATE:  __________________________________

                  VESTING COMMENCEMENT DATE:  ___________________

                  EXERCISE PRICE:  $__________________  per share

                  NUMBER OF OPTION SHARES:  ______________ shares

                  EXPIRATION DATE:  _____________________________

                  TYPE OF OPTION:  Non-Statutory Stock Option

                  EXERCISE  SCHEDULE:  The  Option  shall  become
                  exercisable  with  respect  to (i)  twenty-five
                  percent   (25%)  of  the  Option   Shares  upon
                  Optionee's   completion  of  one  (1)  year  of
                  Service measured from the Vesting  Commencement
                  Date and (ii) the balance of the Option  Shares
                  in successive equal monthly  installments  upon
                  Optionee's  completion  of  each  of  the  next
                  thirty-six (36) months of Service measured from
                  and after the first  anniversary of the Vesting
                  Commencement Date. In no event shall the Option
                  become  exercisable  for any additional  Option
                  Shares after Optionee's cessation of Service.

          Optionee understands and agrees that the Option is
granted subject to and in accordance with the terms of the Komag
Material Technology, Inc. 1995 Stock Option Plan (the "Plan").
Optionee further agrees to be bound by the terms of the Plan and
the terms of the Option as set forth in the Stock Option
Agreement attached hereto as Exhibit A.

          Optionee hereby acknowledges receipt of a copy of the
official prospectus for the Plan in the form attached hereto as
Exhibit B. A copy of the Plan is available upon request made to
the Corporate Secretary at the Corporation's principal offices.


<PAGE>


          NO EMPLOYMENT OR SERVICE CONTRACT.  Nothing in this
Notice or in the Plan or in the attached Stock Option Agreement
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
Subsidiary employing or retaining Optionee) or 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
attached Stock Option Agreement.

          
Date  ____________, 199__


                           KOMAG MATERIAL TECHNOLOGY, INC.


                           By:  _________________________

                             Title:  ____________________

                           ______________________________
                           OPTIONEE

                           Address:  ____________________

                                     ____________________

ATTACHMENTS
Exhibit A - Stock Option Agreement
Exhibit B - Plan Summary and Prospectus

                               2.
<PAGE>


                            EXHIBIT A

                     STOCK OPTION AGREEMENT





<PAGE>


                            EXHIBIT B

                   PLAN SUMMARY AND PROSPECTUS





                          EXHIBIT 99.3

     Form of Stock Option Agreement (Employees/Consultants)


                 KOMAG MATERIAL TECHNOLOGY, INC.
                     STOCK OPTION AGREEMENT


RECITALS

     A. The Board has adopted the Plan for the purpose of
retaining the services of selected Employees and consultants who
provide valuable services to the Corporation (or any Subsidiary).

     B. Optionee is a person who provides such services to the
Corporation (or a Subsidiary), 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 an option to
Optionee to purchase shares of Komag Stock.

     C. All capitalized terms in this Agreement shall have the
meaning assigned to them in the attached Appendix.

          NOW, THEREFORE, it is hereby agreed as follows:

          1. GRANT OF OPTION. The Corporation hereby grants to
Optionee, as of the Grant Date, an option to purchase up to the
number of Option Shares specified in the Grant Notice. The Option
Shares shall be purchasable from time to time during the option
term specified in Paragraph 2 at the Exercise Price.

          2. OPTION TERM. This option shall have a term of ten
(10) years measured from the Grant Date and shall accordingly
expire at the close of business on the Expiration Date, unless
sooner terminated in accordance with Paragraph 5 or 6.

          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 EXERCISE.

               (a) This option shall become exercisable for the
Option Shares in a series of installments as specified in the
Grant Notice. As the option becomes exercisable for one or more
installments, those installments shall accumulate and the option
shall remain exercisable for the accumulated installments until
the Expiration Date or sooner termination of the option term
under Paragraph 5 or 6.

               (b) Should the Optionee cease active Service by
reason of an Unpaid Leave of Absence, then this option shall not


<PAGE>


become exercisable for any additional Option Shares pursuant to
the exercise schedule set forth in the Grant Notice once the
duration of that Unpaid Leave of Absence exceeds thirty (30)
days. Accordingly, upon the expiration of the thirty (30)-day
period measured from the commencement date of the Unpaid Leave of
Absence, the exercise schedule for this option shall be frozen
and shall not be reinstated unless the Optionee returns to active
Service on or before the authorized expiration date of such
leave. Should the Optionee return to active Service on such a
timely basis, then the exercise schedule shall immediately resume
at the point where such schedule was frozen, and the option shall
become exercisable for one or more additional Option Shares on
the basis of the Optionee's Service rendered from and after the
resumption date.

          5. CESSATION OF SERVICE. The option term specified in
Paragraph 2 shall terminate (and this option shall cease to be
outstanding) prior to the Expiration Date should any of the
following provisions become applicable:

               (i) Should Optionee cease to remain in Service for
          any reason (other than death or Permanent Disability)
          while this option is outstanding, then Optionee shall
          have a period of thirty (30) days (commencing with the
          date of such cessation of Service) during which to
          exercise this option, but in no event shall this option
          be exercisable at any time after the Expiration Date.

               (ii) Should Optionee die while this option is
          outstanding, then the personal representative of
          Optionee's estate or the person or persons to whom the
          option is transferred pursuant to Optionee's will or in
          accordance with the laws of descent and distribution
          shall have the right to exercise this option. Such
          right shall lapse and this option shall cease to be
          outstanding upon the EARLIER of (A) the first
          anniversary of the date of Optionee's death or (B) the
          Expiration Date.

               (iii) Should Optionee cease Service by reason of
          Permanent Disability while this option is outstanding,
          then Optionee shall have a period of twelve (12) months
          (commencing with the date of such cessation of Service)
          during which to exercise this option. Such right shall
          lapse and this option shall cease to be outstanding
          upon the EARLIER of (A) the expiration of the twelve
          (12)-month period measured from the date of Optionee's
          Permanent Disability or (B) the Expiration Date.

                               2.
<PAGE>


               (iv) Should Optionee's Service be terminated for
          Misconduct, then this option shall terminate
          immediately and cease to remain outstanding.

               (v) During the limited period of post-Service
          exercisability, this option may not be exercised in the
          aggregate for more than the number of Option Shares for
          which the option is exercisable at the time of
          Optionee's cessation of Service. However, should
          Optionee's Service terminate by reason of death,
          Permanent Disability or retirement at or after age
          sixty- five (65), then this option may be exercised,
          during the applicable period of post-Service
          exercisability, for any or all of the Option Shares at
          the time subject to this option. Upon the Optionee's
          cessation of Service for any other reason, this option
          shall immediately terminate and cease to be outstanding
          with respect to any or all Option Shares for which this
          option is not otherwise at that time exercisable in
          accordance with the exercise schedule set forth in the
          Grant Notice or the special acceleration provisions of
          Paragraph 6.

          6. SPECIAL ACCELERATION OF OPTION.

               (a) In the event of any KMT Corporate Transaction,
this option shall either be assumed by the successor corporation
(or parent thereof) or replaced with a comparable option to
purchase shares of the capital stock of the successor corporation
(or parent thereof).

               (b) In the event of any Komag Corporate
Transaction, this option shall automatically accelerate so that
this option shall, for the five (5) business days immediately
prior to the effective date of the Komag Corporate Transaction,
become fully exercisable for all the shares of Komag Stock at the
time subject to this option and may be exercised for any or all
of those shares as fully-vested shares of Komag Stock. However,
this option shall not so accelerate if and to the extent: 
(i) this option is, in connection with the Komag Corporate
Transaction, either to be assumed by the successor corporation
(or parent thereof) or to 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 this option is
subject to other limitations imposed by the Plan Administrator at
the time of the option grant. The determination of option
comparability under clause (i) above shall be made by the Plan
Administrator, and its determination shall be final, binding and
conclusive. Immediately following the consummation of the Komag
Corporate Transaction, this option shall terminate and cease to
be outstanding, except to the extent assumed by the successor
corporation (or parent thereof).


                               3.



<PAGE>



               (c) If this option is assumed in connection with a
KMT or Komag 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, PROVIDED 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.

          7. ADJUSTMENT IN OPTION SHARES. Should any change be
made to the Komag Stock by reason of any stock split, stock
dividend, recapitalization, combination of shares, exchange of
shares or other change affecting the outstanding Komag Stock as a
class, appropriate adjustments shall be made to (i) the total
number and/or class of securities subject to this option and 
(ii) the Exercise Price in order to reflect such change and thereby
preclude a dilution or enlargement of benefits hereunder.

          8. STOCKHOLDER RIGHTS. The holder of this option shall
not have any stockholder rights with respect to the Option Shares
until such person shall have exercised the option, paid the
Exercise Price and become a holder of record of the purchased
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 any other person or persons
exercising the option) must take the following actions:

                    (i) Either execute and deliver to the
     Corporation a Notice of Exercise for the Option Shares for
     which the option is exercised or initiate the exercise
     through the interactive response system established with a
     Corporation-designated brokerage firm.

                    (ii) Pay the aggregate Exercise Price for the
     purchased shares in one or more of the following forms:

                    (A) cash or check made payable to the
          Corporation;

                               4.



<PAGE>



                    (B) shares of Komag Stock held by Optionee
          (or any other person or persons exercising the option)
          for the requisite period necessary to avoid a charge to
          the Corporation's (or Komag's) earnings for financial
          reporting purposes and valued at Fair Market Value on
          the Exercise Date; or

                    (C) through a special sale and remittance
          procedure pursuant to which Optionee (or any other
          person or persons exercising the option) shall
          concurrently provide irrevocable 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, sufficient funds to cover the
          aggregate Exercise Price payable for the purchased
          shares plus all applicable Federal, state and local
          income and employment taxes required to be withheld by
          the Corporation by reason of such exercise 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.

                    Except to the extent the sale and remittance
          procedure is utilized in connection with the option
          exercise, payment of the Exercise Price for the
          purchased Option Shares must be made at the time the
          option is exercised.

                    (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.

                    (iv) Make appropriate  arrangements  with the
     Corporation (or Subsidiary  employing or retaining Optionee)
     for the satisfaction of all Federal,  state and local income
     and employment tax  withholding  requirements  applicable to
     the option exercise.

               (b) As soon as practical  after the Exercise Date,
the  Corporation  shall issue to or on behalf of Optionee (or any
other person or persons exercising this option) a certificate for
the purchased Option Shares, with the appropriate legends affixed
thereto.

               (c) In no event may this option be  exercised  for
any fractional shares.

                               5.

<PAGE>

           10.  COMPLIANCE WITH LAWS AND REGULATIONS.

               (a) The  exercise of this option and the  issuance
of the  Option  Shares  upon such  exercise  shall be  subject to
compliance  by the  Corporation,  Komag  and  Optionee  with  all
applicable  requirements  of law  relating  thereto  and with all
applicable  regulations  of any  stock  exchange  (or the  Nasdaq
National  Market,  if  applicable) on which shares of Komag Stock
may be  listed  for  trading  at the  time of such  exercise  and
issuance.

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

          11. SUCCESSORS AND ASSIGNS. Except to the extent
otherwise provided in Paragraphs 3 and 6, the provisions of this
Agreement shall inure to the benefit of, and be binding upon, the
Corporation and its successors and assigns, Komag and its
successors and assigns and Optionee, Optionee's assigns and the
legal representatives, heirs and legatees of Optionee's estate.

          12. 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 at its
principal corporate offices. Any notice required to be given or
delivered to Optionee shall be in writing and addressed to
Optionee at the address indicated below Optionee's signature line
on the Grant Notice. All notices shall be deemed effective upon
personal delivery or upon deposit in the U.S. mail, postage
prepaid and properly addressed to the party to be notified.

          13. 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 terms 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.

          14. GOVERNING LAW. The interpretation, performance and
enforcement of this Agreement shall be governed by the laws of
the State of California without resort to that State's
conflict-of-laws rules.
                               6.


<PAGE>


                            EXHIBIT I

                       NOTICE OF EXERCISE


          I hereby notify Komag Material Technology, Inc. (the
"Corporation") that I elect to purchase ______ shares of the Komag,
Incorporated common stock (the "Purchased Shares") at the option
exercise price of $____ per share (the "Exercise Price") pursuant 
to that certain option (the "Option") granted to me under the
Corporation's 1995 Stock Option Plan on ________________, 199_.

          Concurrently with the delivery of this Exercise Notice
to the Corporation, I shall hereby pay to the Corporation the
Exercise Price for the Purchased Shares in accordance with the
provisions of my agreement with the Corporation (or other
documents) evidencing the Option and shall deliver whatever
additional documents may be required by such agreement as a
condition for exercise. Alternatively, I may utilize the special
broker-dealer sale and remittance procedure specified in my
agreement to effect payment of the Exercise Price.


                       
Date  ____________, 199_

                            ____________________________________
                            Optionee

                            Address:  __________________________

                            
Print name in exact manner
it is to appear on the
stock certificate:          ____________________________________

Address to which certificate
is to be sent, if different
from address above:         ____________________________________

                            ____________________________________


Social Security Number:     ____________________________________

Employee Number:            ____________________________________



<PAGE>


                            APPENDIX


          The following definitions shall be in effect under the
Agreement:

          A. AGREEMENT shall mean this Stock Option Agreement.

          B. BOARD shall mean the Corporation's Board of Directors.

          C. CODE shall mean the Internal Revenue Code of 1986,
as amended.

          D. CORPORATION shall mean Komag Material Technology,
Inc., a Delaware corporation.

          E. EMPLOYEE shall mean an individual who is in the
employ of the Corporation (or any Subsidiary), subject to the
control and direction of the employer entity as to both the work
to be performed and the manner and method of performance.

          F. EXERCISE DATE shall mean the date on which the
option shall have been exercised in accordance with Paragraph 9
of the Agreement.

          G. EXERCISE PRICE shall mean the exercise price per
share as specified in the Grant Notice.

          H. EXPIRATION DATE shall mean the date on which the
option expires as specified in the Grant Notice.

          I. FAIR MARKET VALUE per share of Komag Stock on any
relevant date shall be determined in accordance with the
following provisions:

               (i) If the Komag 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 Komag
          Stock on 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
          Komag Stock on 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 Komag Stock is at the time listed on
          any Stock Exchange, then the Fair Market Value shall be
          the closing selling price per share of Komag Stock on
          the date in question on the Stock Exchange determined
          by the Plan Administrator to be the primary market for
          the

                              A-1.



<PAGE>



          Komag Stock, as such price is officially quoted in the
          composite tape of transactions on such exchange. If
          there is no closing selling price for the Komag Stock
          on the date in question, the Fair Market Value shall be
          the closing selling price on the last preceding date
          for which such quotation exists.

          J. GRANT DATE shall mean the date of grant of the
option as specified in the Grant Notice.

          K. GRANT NOTICE shall mean the Notice of Grant of Stock
Option accompanying the Agreement, pursuant to which Optionee has
been informed of the basic terms of the option evidenced hereby.

          L. KMT CORPORATE TRANSACTION shall mean any of the
following transactions to which the Corporation is a party:

               (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 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.

          M. KOMAG shall mean Komag, Incorporated, a Delaware
corporation, in its capacity as the owner of securities
possessing fifty percent (50%) or more of the total combined
voting power of the Corporation's outstanding securities.

          N. KOMAG BOARD shall mean the Board of Directors of
Komag.

          O. KOMAG CORPORATE TRANSACTION shall mean any of the
following stockholder-approved transactions involving Komag which
is effected while Komag is the owner of securities possessing
fifty percent (50%) or more of the total combined voting power of
the Corporation's outstanding securities:

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

               (ii) the sale, transfer or other disposition of
          all or substantially all of Komag's assets, or


                              A-2.


<PAGE>


               (iii) any reverse merger in which Komag is the
          surviving entity.

          P. KOMAG shall mean Komag, Incorporated, a Delaware
corporation.

          Q. KOMAG STOCK shall mean share of Komag common stock.

          R. KOMAG SUBSIDIARY shall mean any corporation (other
than Komag or the Corporation) in an unbroken chain of
corporations beginning with Komag, provided each 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.

          S. MISCONDUCT shall mean the commission of any act of
fraud, embezzlement or dishonesty by Optionee, any unauthorized
use or disclosure by Optionee of confidential information or
trade secrets of the Corporation (or any Subsidiary) or Komag, or
any other intentional misconduct by Optionee adversely affecting
the business or affairs of the Corporation (or any Subsidiary) or
Komag in a material manner. The foregoing definition shall not be
deemed to be inclusive of all the acts or omissions which the
Corporation (or any Subsidiary) may consider as grounds for the
dismissal or discharge of Optionee or any other individual in the
Service of the Corporation (or any Subsidiary).

          T. NON-STATUTORY OPTION shall mean an option not
intended to satisfy the requirements of Code Section 422.

          U. NOTICE OF EXERCISE shall mean the notice of exercise
in the form attached hereto as Exhibit I.

          V. OPTION SHARES shall mean the number of shares of
Komag Stock subject to the option as specified in the Grant
Notice.

          W. OPTIONEE shall mean the person to whom the option is
granted as specified in the Grant Notice.

          X. PERMANENT DISABILITY OR PERMANENTLY DISABLED shall
mean the inability of the Optionee to engage in any substantial
gainful activity by reason of any medically determinable physical
or mental impairment expected to result in death or to be of
continuous duration of twelve (12) months or more.

          Y. PLAN shall mean the Corporation's 1995 Stock Option
Plan.

          Z. SERVICE shall mean the Optionee's performance of
services for the Corporation (or any Subsidiary) in the capacity
of an Employee or a consultant or independent advisor. Optionee
shall

                              A-3.



<PAGE>


also be deemed to be engaged in such Service for any period of
time Optionee performs such services for Komag or any Komag
Subsidiary, provided Komag is at the time the owner of securities
possessing fifty percent (50%) or more of the total combined
voting power of the Corporation's outstanding securities.

          AA. STOCK EXCHANGE shall mean the American Stock
Exchange or the New York Stock Exchange.

          AB. SUBSIDIARY shall mean any corporation (other than
the Corporation) in an unbroken chain of corporations beginning
with the Corporation, provided each 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.

          AC. UNPAID LEAVE OF ABSENCE shall mean a temporary work
stoppage or other absence from active Service, authorized by the
Corporation in writing, which shall not constitute a cessation of
Optionee's Service under the Plan or this Agreement, provided
Optionee returns to active Service on or before the authorized
expiration date of such work stoppage or absence.



                              A-4.





                                                        OFFICERS

                          EXHIBIT 99.4

            Form of Stock Option Agreement (Officers)




                 KOMAG MATERIAL TECHNOLOGY, INC.
                     STOCK OPTION AGREEMENT


RECITALS

     A.  The  Board  has  adopted  the Plan  for the  purpose  of
retaining the services of selected  Employees and consultants and
other   independent   advisors   who  provide   services  to  the
Corporation (or any Subsidiary).

     B.   Optionee  is  to  render   valuable   services  to  the
Corporation  (or a  Subsidiary),  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 an option to
Optionee to purchase shares of Komag Stock.

     C. All capitalized terms in this Agreement shall have the
meaning assigned to them in the attached Appendix.

          NOW, THEREFORE, it is hereby agreed as follows:

          1. GRANT OF OPTION. The Corporation hereby grants to
Optionee, as of the Grant Date, an option to purchase up to the
number of Option Shares specified in the Grant Notice. The Option
Shares shall be purchasable from time to time during the option
term specified in Paragraph 2 at the Exercise Price.

          2. OPTION TERM. This option shall have a term of ten
(10) years measured from the Grant Date and shall accordingly
expire at the close of business on the Expiration Date, unless
sooner terminated in accordance with Paragraph 5 or 6.

          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. However, this option may also be
assigned in accordance with the terms of a Qualified Domestic
Relations Order. If so assigned, the assigned option shall be
exercisable only by the person or persons who acquire a
proprietary interest in the option pursuant to such Qualified
Domestic Relations Order. The terms applicable to the assigned
option (or portion thereof) shall be the same as those in effect
for this 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>



          4. DATES OF EXERCISE.

               (a) This option shall become exercisable for the
Option Shares in one or more installments as specified in the
Grant Notice. As the option becomes exercisable for such
installments, those installments shall accumulate and the option
shall remain exercisable for the accumulated installments until
the Expiration Date or sooner termination of the option term
under Paragraph 5 or 6.

               (b) Upon the expiration of the thirty (30)-day
period following the commencement date of any Unpaid Leave of
Absence, the exercise schedule for this option shall cease to
continue and shall be suspended until such time as the Optionee
recommences Service, provided such recommencement is on or prior
to the authorized expiration date of such leave. Upon the
recommencement of Optionee's Service following such Unpaid Leave
of Absence, the exercise schedule for this option shall cease to
remain suspended and this option shall continue to be exercisable
under the recommenced exercise schedule until the expiration or
sooner termination of the option term.

          5. CESSATION OF SERVICE. The option term specified in
Paragraph 2 shall terminate (and this option shall cease to be
outstanding) prior to the Expiration Date should any of the
following provisions become applicable:

                    (i) Should Optionee cease to remain in
          Service for any reason (other than death or Permanent
          Disability) while this option is outstanding, then
          Optionee shall have a period of nine (9) months and one
          (1) day (commencing with the date of such cessation of
          Service) during which to exercise this option, but in
          no event shall this option be exercisable at any time
          after the Expiration Date.

                    (ii) Should Optionee die while this option is
          outstanding or within the nine (9) months and one 
          (1)-day period following cessation of Service, then the
          personal representative of Optionee's estate or the
          person or persons to whom the option is transferred
          pursuant to Optionee's will or in accordance with the
          laws of descent and distribution shall have the right
          to exercise this option. Such right shall lapse and
          this option shall cease to be outstanding 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 cease Service by reason
          of Permanent Disability while this option is

                               2.



<PAGE>


          outstanding, then Optionee shall have a period of
          twelve (12) months (commencing with the date of such
          cessation of Service) during which to exercise this
          option. Such right shall lapse and this option shall
          cease to be outstanding upon the EARLIER of (A) the
          expiration of the twelve (12)-month period measured
          from the date of Optionee's Permanent Disability or 
          (B) the Expiration Date.

                    (iv) Should Optionee's Service be terminated
          for Misconduct, then this option shall terminate
          immediately and cease to remain outstanding.

                    (v) During the limited period of post-
          Service exercisability, this option may not be
          exercised in the aggregate for more than the number of
          vested Option Shares for which the option is
          exercisable at the time of Optionee's cessation of
          Service. However, should Optionee's Service be
          terminated by reason of death, Permanent Disability, or
          retirement at or after age sixty-five (65), then this
          option may also be exercised, during the applicable
          period of exercisability provided under subparagraph
          (ii) or (iii) above, for any or all of the additional
          Option Shares for which this option would have become
          exercisable had the Optionee continued in Service
          through the last date for the normal exercise
          provisions specified in the Grant Notice. Upon the
          expiration of such exercise periods or (if earlier)
          upon the Expiration Date, this option shall terminate
          and cease to be outstanding for any vested Option
          Shares for which the option has not been exercised.

                    (vi) In the event of a Corporate Transaction,
          the provisions of Paragraph 6 shall govern the period
          for which this option is to remain exercisable
          following Optionee's cessation of Service and shall
          supersede any provisions to the contrary in this
          paragraph.

          6. SPECIAL ACCELERATION OF OPTION.

               (a) In the event of any Corporate Transaction
involving the Corporation (or any Subsidiary), this option shall
either be assumed by the successor corporation (or parent
thereof) or replaced with a comparable option to purchase shares
of the capital stock of the successor corporation (or parent
thereof).

               (b) (i) In the event of any Corporate Transaction
involving Komag (only to the extent Komag is, at the time of such
Corporate Transaction, a Parent of the Corporation), this option
shall automatically accelerate so that this option

                               3.

<PAGE>


shall, for the five (5) business days immediately prior to the
effective date of the Corporate Transaction, become fully
exercisable shares of Komag Stock at the time subject to this
option and may be exercised for any or all of those shares as
fully-vested shares of Komag Stock. However, this option shall
not so accelerate if and to the extent: (i) this option is, in
connection with the Corporate Transaction, either to be assumed
by the successor corporation (or parent thereof) or to 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 this option is subject to other
limitations imposed by the Plan Administrator at the time of the
option grant. The determination of option comparability under
clause (i) above shall be made by the Plan Administrator, and its
determination shall be final, binding and conclusive.

                    (ii) Immediately following the consummation
of the Corporate Transaction under this subsection (b), this
option shall terminate and cease to be outstanding, except to the
extent assumed by the successor corporation (or parent thereof).

               (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,  provided  the  aggregate
Exercise Price shall remain the same.

               (d) Upon an Involuntary  Termination of Optionee's
Service  within  eighteen  (18)  months   following  a  Corporate
Transaction  in which this  option is assumed  or  replaced,  the
exercisability of this option, to the extent  outstanding at such
time but not otherwise  fully  exercisable,  shall  automatically
accelerate  so that this option  shall  immediately  become fully
exercisable for all the Option Shares at the time subject to this
option as fully-vested shares of Komag Stock and may be exercised
for any or all of those  shares at any time prior to the  earlier
of (i) the  Expiration  Date or (ii)  the  expiration  of the one
(1)-year   period   measured  from  the  effective  date  of  the
Involuntary Termination.

               (e) 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.

                               4.



<PAGE>


          7. ADJUSTMENT IN OPTION SHARES. Should any change be
made to the Komag Stock by reason of any stock split, stock
dividend, recapitalization, combination of shares, exchange of
shares or other change affecting the outstanding Komag Stock as a
class, appropriate adjustments shall be made to (i) the total
number and/or class of securities subject to this option and (ii)
the Exercise Price in order to reflect such change and thereby
preclude a dilution or enlargement of benefits hereunder.

          8. STOCKHOLDER RIGHTS. The holder of this option shall
not have any stockholder rights with respect to the Option Shares
until such person shall have exercised the option, paid the
Exercise Price and become a holder of record of the purchased
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 any other person or persons
exercising the option) must take the following actions:

                    (i) Execute and deliver to the Corporation a
          Notice of Exercise for the Option Shares for which the
          option is exercised.

                    (ii) Pay the aggregate Exercise Price for the
          purchased shares in one or more of the following forms:

                         (A) cash or check made payable to the
               Corporation;

                         (B) a promissory note payable to the
               Corporation, but only to the extent approved by
               the Plan Administrator in accordance with
               Paragraph 13;

                         (C) shares of Komag Stock held by
               Optionee (or any other person or persons
               exercising the option) for the requisite period
               necessary to avoid a charge to the Corporation's
               (or Komag's) earnings for financial reporting
               purposes and valued at Fair Market Value on the
               Exercise Date; or

                         (D) through a special sale and
               remittance procedure pursuant to which Optionee
               (or any other person or persons exercising the
               option) shall concurrently provide irrevocable
               written instructions (I) to a
               Corporation-designated

                               5.



<PAGE>



               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,
               sufficient funds to cover the aggregate Exercise
               Price payable for the purchased shares plus all
               applicable Federal, state and local income and
               employment taxes required to be withheld by the
               Corporation by reason of such exercise 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.

                         Except to the extent the sale and
               remittance procedure is utilized in connection
               with the option exercise, payment of the Exercise
               Price must accompany the Notice of Exercise
               delivered to the Corporation in connection with
               the option exercise.

                    (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.

                    (iv) Make appropriate arrangements with the
          Corporation (or Subsidiary employing or retaining
          Optionee) for the satisfaction of all Federal, state
          and local income and employment tax withholding
          requirements applicable to the option exercise.

               (b) As soon as practical after the Exercise Date,
the Corporation shall issue to or on behalf of Optionee (or any
other person or persons exercising this option) a certificate for
the purchased Option Shares, with the appropriate legends affixed
thereto.

               (c) In no event may this option be exercised for
any fractional shares.

           10. COMPLIANCE WITH LAWS AND REGULATIONS.

               (a) The exercise of this option and the issuance
of the Option Shares upon such exercise shall be subject to
compliance by the Corporation, Komag and Optionee with all
applicable requirements of law relating thereto and with all
applicable regulations of any stock exchange (or the Nasdaq
National Market if applicable) on which shares of Komag Stock may
be listed for trading at the time of such exercise and issuance.

               (b) The inability of the Corporation or Komag to
obtain approval from any regulatory body having authority deemed
by the Corporation or Komag to be necessary to the lawful
issuance and

                               6.



<PAGE>



sale of Komag Stock pursuant to this option shall relieve the
Corporation and Komag of any liability with respect to the non-
issuance or sale of Komag Stock as to which such approval shall
not have been obtained. The Corporation and Komag, however, shall
use their best efforts to obtain all such approvals.

          11. SUCCESSORS AND ASSIGNS. Except to the extent
otherwise provided in Paragraphs 3 and 6, the provisions of this
Agreement shall inure to the benefit of, and be binding upon, the
Corporation and its successors and assigns, Komag and its
successors and assigns and Optionee, Optionee's assigns and the
legal representatives, heirs and legatees of Optionee's estate.

          12. 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 at its
principal corporate offices. Any notice required to be given or
delivered to Optionee shall be in writing and addressed to
Optionee at the address indicated below Optionee's signature line
on the Grant Notice. All notices shall be deemed effective upon
personal delivery or upon deposit in the U.S. mail, postage
prepaid and properly addressed to the party to be notified.

          13. FINANCING. The Plan Administrator may, in its
absolute discretion and without any obligation to do so, permit
Optionee to pay the Exercise Price for the purchased Option
Shares by delivering a promissory note. The terms of any such
promissory note (including the interest rate, the requirements
for collateral and the terms of repayment) shall be established
by the Plan Administrator in its sole discretion.

          14. 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 terms 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.

          15. GOVERNING LAW. The interpretation, performance and
enforcement of this Agreement shall be governed by the laws of
the State of California without resort to that State's
conflict-of-laws rules.

          16. EXCESS SHARES. If the Option Shares covered by this
Agreement exceed, as of the Grant Date, the number of shares of
Komag Stock which may without stockholder approval be issued
under the Plan, then this option shall be void with respect to
such excess shares, unless stockholder approval of an amendment
sufficiently increasing the number of shares of Komag Stock

                               7.


<PAGE>



issuable under the Plan is obtained in accordance with the
provisions of the Plan.

                               8.



<PAGE>


                            EXHIBIT I

                       NOTICE OF EXERCISE


          I hereby notify Komag Material Technology, Inc. (the
"Corporation") that I elect to purchase shares of the Komag,
Incorporated common stock (the "Purchased Shares") at the option
exercise price of $_______ per share (the "Exercise Price") pursuant 
to that certain option (the "Option") granted to me under the
Corporation's 1995 Stock Option Plan on ___________, 199_.

          Concurrently with the delivery of this Exercise Notice
to the Corporation, I shall hereby pay to the Corporation the
Exercise Price for the Purchased Shares in accordance with the
provisions of my agreement with the Corporation (or other
documents) evidencing the Option and shall deliver whatever
additional documents may be required by such agreement as a
condition for exercise. Alternatively, I may utilize the special
broker-dealer sale and remittance procedure specified in my
agreement to effect payment of the Exercise Price.

                     
Date ______________, 199_

                            ____________________________________
                            Optionee

                            Address:  __________________________

                            ____________________________________

Print name in exact manner
it is to appear on the
stock certificate:          ____________________________________

Address to which certificate
is to be sent, if different
from address above:         ____________________________________



Social Security Number:     ____________________________________

Employee Number:            ____________________________________




<PAGE>



                            APPENDIX


          The following definitions shall be in effect under the
Agreement:

          A. AGREEMENT shall mean this Stock Option Agreement.

          B. BOARD shall mean the Corporation's Board of
Directors.

          C. CODE shall mean the Internal Revenue Code of 1986,
as amended.

          D. CORPORATE TRANSACTION shall mean either of the
following stockholder-approved transactions to which either the
Corporation or Komag is a party:

               (i) a merger or consolidation in which securities
          possessing more than fifty percent (50%) of the total
          combined voting power of the Corporation's (or Komag's)
          outstanding securities are transferred to a person or
          persons different from the persons holding those
          immediately prior to such transaction; or

               (ii) the sale, transfer or other disposition of
          all or substantially all of the Corporation's (or
          Komag's) assets in complete liquidation or dissolution
          of the Corporation.

          E. CORPORATION shall mean Komag Material Technology,
Inc., a California corporation.

          F. DOMESTIC RELATIONS ORDER shall mean any judgment,
decree or order (including approval of a property settlement
agreement) which provides or otherwise conveys, pursuant to
applicable State domestic relations laws (including community
property laws), marital property rights to any spouse or former
spouse of the Optionee.

          G. EMPLOYEE shall mean an individual who is in the
employ of the Corporation (or any Subsidiary), subject to the
control and direction of the employer entity as to both the work
to be performed and the manner and method of performance.

          H. EXERCISE DATE shall mean the date on which the
option shall have been exercised in accordance with Paragraph 9
of the Agreement.

          I. EXERCISE PRICE shall mean the exercise price per
share as specified in the Grant Notice.


                              A-1.



<PAGE>



          J. EXPIRATION DATE shall mean the date on which the
option expires as specified in the Grant Notice.

          K. FAIR MARKET VALUE per share of Komag Stock on any
relevant date shall be determined in accordance with the
following provisions:

               (i) If the Komag 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 Komag
          Stock on 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
          Komag Stock on 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 Komag Stock is at the time listed on
          any Stock Exchange, then the Fair Market Value shall be
          the closing selling price per share of Komag Stock on
          the date in question on the Stock Exchange determined
          by the Plan Administrator to be the primary market for
          the Komag Stock, as such price is officially quoted in
          the composite tape of transactions on such exchange. If
          there is no closing selling price for the Komag Stock
          on 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.

          L. GRANT DATE shall mean the date of grant of the
option as specified in the Grant Notice.

          M. GRANT NOTICE shall mean the Notice of Grant of Stock
Option accompanying the Agreement, pursuant to which Optionee has
been informed of the basic terms of the option evidenced hereby.

          N. INVOLUNTARY TERMINATION shall mean the termination
of Optionee's Service which occurs by reason of:

               (i) Optionee's involuntary dismissal or discharge
          by the Corporation for reasons other than Misconduct,
          or

               (ii) Optionee's voluntary resignation following
          (A) a change in Optionee's position with the
          Corporation (or any Subsidiary employing Optionee)
          which materially reduces Optionee's level of
          responsibility, (B) a reduction in Optionee's level of
          compensation (including base salary, fringe benefits
          and any non-discretionary and objective-standard
          incentive payment or bonus award)

                              A-2.


<PAGE>


          by more than fifteen percent (15%) or (C) a relocation of
          Optionee's place of employment by more than fifty (50)
          miles, provided and only if such change, reduction or
          relocation is effected by the Corporation without
          Optionee's consent.

          O. KOMAG shall mean Komag, Incorporated, a Delaware
corporation, which is, on the date of the Plan's adoption, a
Parent of the Corporation.

          P. KOMAG STOCK shall mean Komag common stock.

          Q. MISCONDUCT shall mean the commission of any act of
fraud, embezzlement or dishonesty by Optionee, any unauthorized
use or disclosure by Optionee of confidential information or
trade secrets of the Corporation (or any Subsidiary), or any
other intentional misconduct by Optionee adversely affecting the
business or affairs of the Corporation (or any Subsidiary) in a
material manner. The foregoing definition shall not be deemed to
be inclusive of all the acts or omissions which the Corporation
(or any Subsidiary) may consider as grounds for the dismissal or
discharge of Optionee or any other individual in the Service of
the Corporation (or any Subsidiary).

          R. NON-STATUTORY OPTION shall mean an option not
intended to satisfy the requirements of Code Section 422.

          S. NOTICE OF EXERCISE shall mean the notice of exercise
in the form attached hereto as Exhibit I.

          T. OPTION SHARES shall mean the number of shares of
Komag Stock subject to the option as specified in the Grant
Notice.

          U. OPTIONEE shall mean the person to whom the option is
granted as specified in the Grant Notice.

          V. PARENT shall mean any corporation (other than the
Corporation) in an unbroken chain of corporations ending with the
Corporation, provided each 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.

          W. PERMANENT DISABILITY OR PERMANENTLY DISABLED shall
mean the inability of the Optionee to engage in any substantial
gainful activity by reason of any medically determinable physical
or mental impairment expected to result in death or to be of
continuous duration of twelve (12) months or more.

          X. PLAN shall mean the Corporation's 1995 Stock Option
Plan.
                              A-3.

<PAGE>


          Y. PLAN ADMINISTRATOR shall mean either the Board or a
committee of Board members, to the extent the committee is at the
time responsible for the administration of the Plan.

          Z. QUALIFIED DOMESTIC RELATIONS ORDER shall mean a
Domestic Relations Order which substantially complies with the
requirements of Code Section 414(p). The Plan Administrator shall
have the sole discretion to determine whether a Domestic
Relations Order is a Qualified Domestic Relations Order.

          AA. SERVICE shall mean the provision of services to the
Corporation (or any Subsidiary) by a person in the capacity of an
Employee or a consultant or independent advisor.

          AB. STOCK EXCHANGE shall mean the American Stock
Exchange or the New York Stock Exchange.

          AC. SUBSIDIARY shall mean any corporation (other than
the Corporation) in an unbroken chain of corporations beginning
with the Corporation, provided each 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.

          AD. UNPAID LEAVE OF ABSENCE shall mean a temporary work
stoppage, authorized by the Plan Administrator in writing, which
shall not constitute a cessation of Optionee's Service under the
Plan or this Agreement, provided Optionee recommences Service on
or prior to the authorized expiration date of such work stoppage.


                              A-4.



<PAGE>



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