KOMAG INC /DE/
S-8, 1997-07-15
MAGNETIC & OPTICAL RECORDING MEDIA
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           As filed with the Securities and Exchange Commission on July 15, 1997
                                                  Registration No. 333-_________

================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

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

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      Under
                           The Securities Act of 1933

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

                               KOMAG, INCORPORATED
             (Exact name of registrant as specified in its charter)

          Delaware                                         94-2914864
(State or other jurisdiction                   (IRS Employer Identification No.)
of incorporation or organization)

                   1704 Automation Parkway, San Jose, CA 95131
               (Address of principal executive offices) (Zip Code)

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

               KOMAG, INCORPORATED RESTATED 1987 STOCK OPTION PLAN
              KOMAG, INCORPORATED 1988 EMPLOYEE STOCK PURCHASE PLAN
                            (Full title of the Plan)

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

                               STEPHEN C. JOHNSON
                      President and Chief Executive Officer
                               KOMAG, INCORPORATED
                   1704 Automation Parkway, San Jose, CA 95131
                     (Name and address of agent for service)
                                 (408) 576-2000
          (Telephone number, including area code, of agent for service)

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


                         CALCULATION OF REGISTRATION FEE

================================================================================
                                             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
  ----------                  ------------- ------------ --------      ---

Options to Purchase Common      2,500,000      N/A        N/A          N/A
Stock, $0.01 per value 
(Restated 1987 Stock 
Option Plan)

Common Stock, $0.01 par     2,500,000 shares  $18.00     $45,000,000  $13,636.00
value (Restated 1987
Stock Option Plan)

Common Stock, $0.01 par      750,000 shares   $18.00     $13,500,000  $ 4,091.00
value (1988 Employee
Stock Purchase Plan)

Aggregate filing fee                                                  $17,727.00

================================================================================

(1)      This  Registration  Statement shall also cover any additional shares of
         Common  Stock  which  become  issuable  under the  Komag,  Incorporated
         Restated  1987 Stock Option Plan and the 1988 Employee  Stock  Purchase
         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 July 10,  1997,  as  reported  on the Nasdaq  National
         Market.
<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  December 29, 1996,  filed with the SEC on March 7,
                  1997;

         b.       The Registrant's  Quarterly Report on Form 10-Q for the fiscal
                  quarter ended March 30, 1997,  filed with the SEC on April 30,
                  1997; and

         c.       The Registrant's  Registration Statement No. 00-016852 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. Any
statement  contained in a document  incorporated or deemed to be incorporated by
reference  herein shall be deemed to be modified or  superseded  for purposes of
this Registration  Statement to the extent that a statement  contained herein or
in any  subsequently  filed document which also is deemed to be  incorporated by
reference  herein modifies or supersedes  such statement.  Any such statement so
modified or superseded shall not be deemed, except as so modified or superseded,
to constitute a part of this Registration Statement.


Item 4.  Description of Securities

         Not applicable.


Item 5.  Interests of Named Experts and Counsel

         Not applicable.


Item 6.  Indemnification of Directors and Officers

         The Registrant's Restated Certificate of Incorporation provides that no
director of the Registrant will be personally liable to the Registrant or any of
its  stockholders  for monetary  damages  arising from 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) 

<PAGE>

acted in a manner involving intentional misconduct or a knowing violation of law
or, in failing to act, acted in a manner involving  intentional  misconduct or a
knowing violation of law; or (iv) derived an improper personal benefit.

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

     4            Instruments Defining Rights of Stockholders. Reference is made
                  to Registrant's  Registration  Statement No. 00-016852 on Form
                  8-A which is incorporated herein by reference pursuant to Item
                  3.c.
     5            Opinion of Brobeck, Phleger & Harrison LLP.
    23.1          Consent of Independent Auditors - Ernst & Young LLP.
    23.2          Consent of Brobeck,  Phleger & Harrison  LLP is  contained  in
                  Exhibit 5.
    24            Power  of  Attorney.  Reference  is made to page  II-5 of this
                  Registration Statement.
    99.1          Komag, Incorporated Restated 1987 Stock Option Plan.

                                      II-2
<PAGE>

    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).
    99.5**        Form of  Notice  of  Non-Employee  Director  Automatic  Option
                  Grant.
    99.6          Form of Non-Employee  Director Stock Option Agreement (Initial
                  Option Grant).
    99.7          Form of Non-Employee  Director Stock Option Agreement  (Annual
                  Grant).
    99.8***       Komag, Incorporated 1988 Employee Stock Purchase Plan.
    99.9          Plan  Amendment to Komag,  Incorporated  1988  Employee  Stock
                  Purchase Plan effective as of January 22, 1997.
    99.10***      Form of  Enrollment  Form to be generally  used in  connection
                  with Komag, Incorporated 1988 Employee Stock Purchase Plan.

*Incorporated  by reference to Exhibits 28.4,  28.5 and 28.7,  respectively,  to
Registrant's  Registration Statement No. 33-53432 on Form S-8 filed with the SEC
on October 16, 1992.

**  Incorporated  by  reference  to Exhibit  99.5 to  Registrant's  Registration
Statement No. 333-06081 on Form S-8 filed with the SEC on June 14, 1996.

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


                                      II-3
<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
either the Restated 1987 Stock Option Plan or the 1988 Employee  Stock  Purchase
Plan.

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

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

                                      II-4
<PAGE>


                                   SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933, as amended,
the Registrant certifies that it has reasonable grounds to believe that it meets
all of the  requirements  for  filing  on  Form  S-8 and has  duly  caused  this
Registration Statement to be signed on its behalf by the undersigned,  thereunto
duly authorized, in the City of San Jose,  State of California, on this 14th day
of July, 1997.


                                       KOMAG, INCORPORATED


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


                                POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

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

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

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



- ------------------------  President, Chief Executive Officer       July 14, 1997
Stephen C. Johnson        and Director (Principal Executive                     
                          Officer)                                              
                                                                                
                          
                                      II-5

<PAGE>

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

- ------------------------  Chairman of the Board                    July 14, 1997
Tu Chen                   


- ------------------------  Senior Vice President,                   July 14, 1997
William L. Potts, Jr.     Chief Financial Officer and
                          Secretary (Principal Financial
                          and Accounting Officer)


- ------------------------  Director                                 July 14, 1997
Craig R. Barrett


- ------------------------  Director                                 July 14, 1997
Chris A. Eyre


- ------------------------  Director                                 July 14, 1997
Irwin Federman


- ------------------------  Director                                 July 14, 1997
George A. Neil


- ------------------------  Director                                 July 14, 1997
Max Palevsky


- ------------------------  Director                                 July 14, 1997
Anthony Sun


- ------------------------  Director                                 July 14, 1997
Masayoshi Takebayashi


                                      II-6
<PAGE>





                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                    EXHIBITS

                                       TO

                                    FORM S-8

                                      UNDER

                             SECURITIES ACT OF 1933




                               KOMAG, INCORPORATED




<PAGE>


                                  EXHIBIT INDEX
                                  -------------

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

     4            Instruments Defining Rights of Stockholders. Reference is made
                  to Registrant's  Registration  Statement No. 00-016852 on Form
                  8-A which is incorporated herein by reference pursuant to Item
                  3.c.
     5            Opinion of Brobeck, Phleger & Harrison LLP.
    23.1          Consent of Independent Auditors - Ernst & Young LLP.
    23.2          Consent of Brobeck,  Phleger & Harrison  LLP is  contained  in
                  Exhibit 5.
    24            Power  of  Attorney.  Reference  is made to page  II-5 of this
                  Registration Statement.
    99.1          Komag, Incorporated Restated 1987 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).
    99.5**        Form of  Notice  of  Non-Employee  Director  Automatic  Option
                  Grant.
    99.6          Form of Non-Employee  Director Stock Option Agreement (Initial
                  Option Grant).
    99.7          Form of Non-Employee  Director Stock Option Agreement  (Annual
                  Grant).
    99.8***       Komag, Incorporated 1988 Employee Stock Purchase Plan.
    99.9          Plan  Amendment to Komag,  Incorporated  1988  Employee  Stock
                  Purchase Plan effective as of January 22, 1997.
    99.10***      Form of  Enrollment  Form to be generally  used in  connection
                  with Komag, Incorporated 1988 Employee Stock Purchase Plan.

*Incorporated  by reference to Exhibits 28.4,  28.5 and 28.7,  respectively,  to
Registrant's  Registration Statement No. 33-53432 on Form S-8 filed with the SEC
on October 16, 1992.

**  Incorporated  by  reference  to Exhibit  99.5 to  Registrant's  Registration
Statement No. 333-06081 on Form S-8 filed with the SEC on June 14, 1996.

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








                                  July 10, 1997






Komag, Incorporated
1704 Automation Parkway
San Jose, California  95131


         Re:  Komag, Incorporated (the "Company") --
              Registration Statement for Offering of 3,250,000 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 an aggregate of
3,250,000  shares  of  Common  Stock  of  Komag,  Incorporated  (the  "Company")
authorized for issuance under the Company's  Restated 1987 Stock Option Plan and
the 1988 Employee Stock  Purchase Plan  (together,  the "Plans").  We advise you
that, in our opinion, when such shares have been issued and sold pursuant to the
applicable  provisions  of the Plans  and in  accordance  with the  Registration
Statement,  such shares will be validly  issued,  fully paid and  non-assessable
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,



                                           /s/ BROBECK, PHLEGER & HARRISON LLP
                                           BROBECK, PHLEGER & HARRISON LLP




We consent to the incorporation by reference in the Registration Statement (Form
S-8) pertaining to the Komag,  Incorporated  Restated 1987 Stock Option Plan and
the Komag,  Incorporated  1988 Employee  Stock Purchase Plan of our report dated
January 16, 1997,  with respect to the  consolidated  financial  statements  and
schedule of Komag,  Incorporated  included in its Annual  Report (Form 10-K) for
the year ended  December  29,  1996,  filed  with the  Securities  and  Exchange
Commission.

                                                     Ernst & Young LLP


San Jose, California
July 11, 1997






                               KOMAG, INCORPORATED

                         RESTATED 1987 STOCK OPTION PLAN

                  (Amended and Restated through March 31, 1997)


                                   ARTICLE ONE

                               GENERAL PROVISIONS


       I.         PURPOSES OF THE PLAN

                  This  Restated 1987 Stock Option Plan (the "Plan") is intended
to promote the interests of Komag,  Incorporated,  a Delaware  corporation  (the
"Corporation"),  by  providing  a method  whereby  eligible  individuals  may be
offered   incentives  and  rewards  which  will  encourage  them  to  acquire  a
proprietary  interest,  or otherwise increase their proprietary interest, in the
Corporation and continue to render services to the Corporation (or its parent or
subsidiary corporations).

      II.         STRUCTURE OF THE PLAN

                  A.  Option  Programs.  The  Plan  shall  be  divided  into two
separate components: the Discretionary Option Grant Program described in Article
Two and the Automatic Option Grant Program described in Article Three. Under the
Discretionary Option Grant Program,  eligible individuals may, at the discretion
of the Plan Administrator, be granted options to purchase shares of Common Stock
in accordance  with the  provisions of Article Two.  Under the Automatic  Option
Grant Program, each eligible member of the Corporation's Board of Directors (the
"Board") will automatically receive an option grant to purchase shares of Common
Stock in accordance with the provisions of Article Three.

                  B. General  Provisions.  Unless the context clearly  indicates
otherwise,  the  provisions  of Articles One and Four of the Plan shall apply to
the  Discretionary  Option Grant Program and the Automatic  Option Grant Program
and shall accordingly govern the interests of all individuals under the Plan.

     III.         ADMINISTRATION OF THE PLAN

                  A.  The   Discretionary   Option   Grant   Program   shall  be
administered by one or more committees  comprised of Board members.  The primary
committee  (the  "Primary   Committee")  shall  be  comprised  of  two  or  more
non-employee Board members and shall have sole and exclusive  authority to grant
stock options and stock appreciation rights under the Discretionary Option Grant
Program to officers and employee-directors of the

<PAGE>

Corporation  subject  to the  short-swing  profit  restrictions  of the  Federal
securities  laws.  Stock options may be granted under the  Discretionary  Option
Grant  Program to all other  eligible  employees and  consultants  by either the
Primary Committee or a second committee  comprised of two or more employee-Board
members (the "Secondary  Committee").  The members of the Primary  Committee and
the  Secondary  Committee  shall each serve for such period of time as the Board
may determine and shall be subject to removal by the Board at any time.

                  B. Subject to the limited  authority  provided  the  Secondary
Committee to effect option grants in accordance with the provisions of paragraph
III.A  of this  Article  One,  the  Primary  Committee  shall  serve as the Plan
Administrator  and shall have full power and  authority  (subject to the express
provisions of the  Discretionary  Option Grant  Program) to establish such rules
and regulations as it may deem appropriate for the proper administration of such
program and to make such  determinations  under the program and any  outstanding
option  as  it  may  deem   necessary  or  advisable.   Decisions  of  the  Plan
Administrator  shall be final and binding on all parties with an interest in the
Plan or any outstanding option under this Discretionary Option Grant Program.

                  C.  Administration of the Automatic Option Grant Program shall
be self-  executing  in  accordance  with the express  terms and  conditions  of
Article Three.

      IV.         ELIGIBILITY FOR OPTION GRANTS

                  A. The  persons  eligible to receive  options  pursuant to the
Discretionary Option Grant Program under Article Two of the Plan shall be

                  - those key employees  (including  officers and  directors) of
         the Corporation (or its parent or subsidiary  corporations)  who render
         services  which tend to  contribute  materially  to the  success of the
         Corporation  (or its parent or  subsidiary  corporations)  or which may
         reasonably  be  anticipated  to  contribute  materially  to the  future
         success of the Corporation (or its parent or subsidiary corporations),

                  - non-employee  Board members who render valuable  services to
         the Corporation (or its parent or subsidiary corporations), and

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

                  B.  Non-employee  Board  members  shall  also be  eligible  to
receive automatic option grants under the provisions of Article Three.


                                       2.
<PAGE>
                  C. The Plan Administrator  shall have full authority to select
the eligible  individuals  who are to receive  option grants under the Plan, the
number of shares to be covered by each granted option, whether such option is to
be  an  incentive  stock  option   ("Incentive   Option")  which  satisfies  the
requirements  of Section 422 of the  Internal  Revenue  Code or a  non-statutory
option ("Non-Statutory Option") not intended to meet such requirements, the time
or times at which such option is to become  exercisable and the maximum term for
which the option is to be outstanding.

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

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

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

       V.         STOCK SUBJECT TO THE PLAN

                  A. The stock  issuable  under the Plan  shall be shares of the
Corporation's  authorized but unissued or reacquired Common Stock. The aggregate
number of shares  which may be issued over the term of the Plan shall not exceed
18,140,000*  shares  (subject to adjustment from time to time in accordance with
paragraph V.D of this Article One).  Such share reserve  includes an increase of
2,500,000  shares  that was  adopted  by the  Board in March  1997,  subject  to
stockholder approval at the 1997 Annual Meeting.

- --------
*Adjusted to reflect (i) the  two-for-one  split of the Common Stock effected in
December 1995 and (ii) the 3,000,000-share  (post-split) increase adopted by the
Board in  January  1996 and  approved  by the  stockholders  at the 1996  Annual
Meeting. In no event, however, shall more than 10,136,696 shares of Common Stock
(post-split)  be  issuable  under the Plan  after  March 17,  1997,  subject  to
adjustment  under  paragraph  V.D of this  Article  One in the event of  certain
changes in the Corporation's capital structure.

                                       3.

<PAGE>

                  B. In no event any one individual participating in the Plan be
granted stock options and separately  exercisable stock appreciation  rights for
more than  3,000,000  shares of Common Stock (as adjusted for the December  1995
split)  in the  aggregate  over  the  remaining  term of the  Plan,  subject  to
adjustment  from time to time in accordance  with  paragraph V.D of this Article
One. For purposes of such  limitation,  no stock  options or stock  appreciation
rights granted prior to January 1, 1994 shall be taken into account.

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

                  D.  In the  event  any  change  is made  to the  Common  Stock
issuable  under the Plan  (whether  by reason of (i)  merger,  consolidation  or
reorganization   or  (ii)   recapitalization,   stock  dividend,   stock  split,
combination of shares,  exchange of shares or other similar change affecting the
outstanding  Common Stock as a class  without  receipt of  consideration),  then
unless  such  change  results  in the  termination  of all  outstanding  options
pursuant to the  provisions  of  paragraph  III of Articles Two and Three of the
Plan,  appropriate  adjustments shall be made to (i) the aggregate number and/or
class of shares issuable under the Plan, (ii) the maximum number and/or class of
shares for which stock options and  separately  exercisable  stock  appreciation
rights may be granted to any one participant in the aggregate after December 31,
1993,  (iii) the  number  and/or  class of shares  and price per share in effect
under each outstanding option under the Discretionary Option Grant Program, (iv)
the  number  and/or  class of shares  per  non-employee  Board  member for which
automatic  option grants are  subsequently to be made under the Automatic Option
Grant Program,  and (v) the number and/or class of shares and price per share of
the Common  Stock in effect under each  automatic  grant  outstanding  under the
Automatic  Option  Grant  Program.  The  purpose  of  such  adjustments  to  the
outstanding  options shall be to preclude the  enlargement or dilution of rights
and benefits under such options.


                                       4.
<PAGE>
                                   ARTICLE TWO

                       DISCRETIONARY OPTION GRANT PROGRAM


       I.         TERMS AND CONDITIONS OF OPTIONS

                  Options  granted   pursuant  to  this  Article  Two  shall  be
authorized  by  action  of  the  Plan   Administrator   and  may,  at  the  Plan
Administrator's   discretion,  be  either  Incentive  Options  or  Non-Statutory
Options.  Individuals  who are not Employees  may only be granted  Non-Statutory
options.  The granted  options shall be evidenced by instruments in such form as
the Plan Administrator shall from time to time approve; provided,  however, that
each such instrument  shall comply with and incorporate the terms and conditions
specified  below.  Each  instrument  evidencing an Incentive  Option  shall,  in
addition,  be subject  to the  applicable  provisions  of  paragraph  II of this
Article Two.

                  A.       Option Price.

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

                           2. The option price shall become immediately due upon
exercise of the option and shall,  subject to the  provisions of paragraph VI of
this Article Two and the instrument evidencing the grant, be payable as follows:

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

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

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


                                       5.
<PAGE>

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

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

                           3. The fair market  value of a share of Common  Stock
on any  relevant  date  under  subparagraph  1 or 2 above  (and  for  all  other
valuation  purposes  under the Plan) shall be determined in accordance  with the
following provisions:

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

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


                                       6.
<PAGE>
                  B.       Term and Exercise of Options.

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

                  C.       Limited Transferability of Options.

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

                  D.       Termination of Service.

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


                                       7.

<PAGE>

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

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

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

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

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


                                       8.
<PAGE>

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

                  D.       Stockholder Rights.

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

                  E.       Repurchase Rights.

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

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

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

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


                                       9.
<PAGE>

      II.         INCENTIVE OPTIONS

                  The terms and conditions  specified  below shall be applicable
to all Incentive  Options granted under this Article Two.  Incentive Options may
only be granted to individuals who are Employees. Options which are specifically
designated as "non-qualified"  or "non-statutory"  options when issued under the
Plan shall not be subject to such terms and conditions:

                  A.  Option  Price.  The  option  price per share of the Common
Stock subject to an Incentive  Option shall in no event be less than one hundred
percent  (100%) of the fair market  value of a share of Common Stock on the date
of grant.

                  B.  Dollar   Limitation.   The  aggregate  fair  market  value
(determined as of the respective date or dates of grant) of the shares of Common
Stock for which one or more options  granted to any employee  under the Plan (or
any  other  option  plan  of  the   Corporation  or  any  parent  or  subsidiary
corporation)  may for the first time become  exercisable  as  Incentive  Options
during  any one (1)  calendar  year  shall  not  exceed  the sum of One  Hundred
Thousand  Dollars  ($100,000).  To the extent the employee holds two (2) or more
such options  which become  exercisable  for the first time in the same calendar
year,  the  foregoing  limitation  on the  exercisability  of  such  options  as
Incentive  Options  shall be  applied  on the basis of the  order in which  such
options are granted.

                  C. 10%  Stockholder.  If any  individual  to whom an Incentive
Option is granted is the owner of stock (as  determined  under Section 424(d) of
the Internal Revenue Code) possessing more than 10% of the total combined voting
power of all  classes  of stock of the  Corporation  or any one of its parent or
subsidiary corporations,  then the option price per share shall not be less than
one hundred and ten percent  (110%) of the fair market value per share of Common
Stock on the grant  date,  and the option  term shall not exceed five (5) years,
measured from the grant date.

                  Except  as  modified  by  the  preceding  provisions  of  this
paragraph  II, the  provisions  of Articles  One, Two and Four of the Plan shall
apply to all Incentive Options granted hereunder.

     III.         CORPORATE TRANSACTIONS

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

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


                                       10.

<PAGE>

                           (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,

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

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

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

                  D.  The  portion  of  any  Incentive  Option   accelerated  in
connection with a Corporate  Transaction  shall remain subject to the applicable
limitations of paragraph II.B.

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


                                       11.
<PAGE>

      IV.         STOCK APPRECIATION RIGHTS

                  A. Officers and non-employee  Board members of the Corporation
subject to the short-swing  profit  restrictions of the Federal  securities laws
may, in the Plan  Administrator's  sole  discretion,  be granted  limited  stock
appreciation  rights in tandem with their outstanding options under this Article
Two. Upon the occurrence of a Hostile  Take-Over  effected at any time after the
Corporation's  outstanding Common Stock is registered under Section 12(g) of the
Exchange Act,  each  outstanding  option with such a limited stock  appreciation
right shall  automatically  be  cancelled  and the  optionee  shall in return be
entitled to a cash  distribution  from the Corporation in an amount equal to the
excess of (i) the  Take-Over  Price of the  shares  of Common  Stock at the time
subject to the cancelled  option  (whether or not the option is otherwise at the
time exercisable for such shares) over (ii) the aggregate exercise price payable
for such shares.  The cash distribution  payable upon such cancellation shall be
made within five (5) days following the  consummation of the Hostile  Take-Over.
The Plan  Administrator  shall  pre-approve,  at the time the  limited  right is
granted,  the subsequent  exercise of that right in accordance with the terms of
the grant and the  provisions of this Section IV. No additional  approval of the
Plan  Administrator  or the Board  shall be  required  at the time of the actual
option cancellation and cash distribution.

                  B. For purposes of paragraph  IV.A, the following  definitions
shall be in effect:

                           A Hostile  Take-Over  shall be deemed to occur in the
         event  any  person  or  related  group  of  persons   (other  than  the
         Corporation  or a person  that  directly  or  indirectly  controls,  is
         controlled  by,  or is under  common  control  with,  the  Corporation)
         directly  or  indirectly  acquires  beneficial  ownership  (within  the
         meaning of Rule 13d-3 of the  Exchange  Act) of  securities  possessing
         more than fifty percent (50%) of the total combined voting power of the
         Corporation's  outstanding  securities pursuant to a tender or exchange
         offer which the Board does not recommend the Corporation's stockholders
         to accept.

                           The  Take-Over  Price per share shall be deemed to be
         equal to the greater of (a) the fair market value per share on the date
         of cancellation,  as determined pursuant to the valuation provisions of
         subparagraph I.A.3, or (b) the highest reported price per share paid in
         effecting such Hostile Take-Over.  However,  if the cancelled option is
         an Incentive  Option,  the Take-Over  Price shall not exceed the clause
         (a) price per share.

                  C. The shares of Common Stock subject to any option  cancelled
for an  appreciation  distribution  pursuant  to this  paragraph  V shall not be
available for subsequent option grant under the Plan.


                                       12.
<PAGE>

       V.         EXTENSION OF EXERCISE PERIOD

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


                                       13.
<PAGE>

                                  ARTICLE THREE

                         AUTOMATIC OPTION GRANT PROGRAM


        I.        ELIGIBILITY

                  The individuals  eligible to receive  automatic  option grants
pursuant  to the  provisions  of this  Article  Three  shall be  limited  to the
following:

                           (i) each individual serving as a non-employee  member
         of the Board on January 24, 1995,  the effective date of this Automatic
         Option Grant Program (the "Effective Date"); and

                           (ii)  each  individual  who  is  first  appointed  or
         elected as a non-employee  Board member at any time after the Effective
         Date.

       II.        TERMS AND CONDITIONS OF AUTOMATIC OPTION GRANTS

                  A. Grant Dates.  Option grants will be made under this Article
Three on the dates specified below:

                           (i) Each  individual who first becomes a non-employee
         Board  member at any time after the  Effective  Date,  whether  through
         election at an Annual  Stockholders  Meeting or through  appointment by
         the Board, shall  automatically be granted, at the time of such initial
         election or  appointment,  a  Non-Statutory  Option to purchase  30,000
         shares of Common  Stock upon the terms and  conditions  of this Article
         Three.  The  size of such  grant  has  been  adjusted  to  reflect  the
         two-for-one  split of the Common Stock which occurred in December 1995,
         but  then  reduced  by  twenty-five  percent  (25%)  to  effect  a  net
         adjustment on a 1.5-for-one basis.

                           (ii) On the date of each Annual Stockholders Meeting,
         beginning with the 1995 Annual  Stockholders  Meeting,  each individual
         who is at the time elected or reelected as a non-employee member of the
         Board shall receive an additional grant of a Non-Statutory Option under
         the Plan to purchase  7,500 shares of the Common  Stock,  provided such
         individual  has been a member of the Board for at least six (6) months.
         The size of such grant has been  adjusted  to reflect  the  two-for-one
         split of the Common  Stock which  occurred in December  1995,  but then
         reduced by  twenty-five  percent (25%) to effect a net  adjustment on a
         1.5-for-one basis.


                                       14.

<PAGE>

                  The applicable 30,000-share and 7,500-share limitations on the
automatic  option  grants to be made to  non-employee  Board  members under this
Article Three shall be subject to periodic adjustment pursuant to the applicable
provisions of paragraph V.C of Article One.

                  B. Exercise Price. The exercise price per share shall be equal
to one hundred percent (100%) of the fair market value per share of Common Stock
on the automatic grant date.

                  C. Payment.

                  The exercise price shall be payable in one of the  alternative
forms specified below:

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

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

                                    (iii)  full  payment  in  a  combination  of
         shares of Common Stock held for the requisite period necessary to avoid
         a charge to the  Corporation's  reported  earnings  and  valued at fair
         market  value on the  Exercise  Date and cash or check  payable  to the
         Corporation's order.

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

                  For purposes of this subparagraph,  the Exercise Date shall be
the date on which notice of the option exercise is delivered to the Corporation,
and the fair market value per share of Common  Stock on any relevant  date shall
be determined in accordance  with the  provisions of paragraph  I.A.3 of Article
Two. Except to the extent the sale and remittance  procedure  specified above is
utilized for the exercise of the option,  payment of the exercise  price for the
purchased shares must accompany such notice.

                                       15.
<PAGE>

                  D. Option Term.  Each automatic grant under this Article Three
shall have a maximum term of ten (10) years  measured from the  automatic  grant
date.

                  E. Exercisability.  The initial  30,000-share  automatic grant
made to each  newly-elected or  newly-appointed  non-employee Board member shall
become exercisable for the option shares in four (4) installments as follows:

                                    (i) The option shall become  exercisable for
         twenty- five percent (25%) of the option shares upon the  completion of
         twelve (12) months of Board service  measured from the automatic  grant
         date.

                                    (ii) The option shall become exercisable for
         an additional  twenty-five  percent (25%) of the option shares upon the
         completion of  twenty-four  (24) months of Board service  measured from
         the automatic grant date.

                                    (iii) The option  shall  become  exercisable
         for an additional  twenty-five  percent (25%) of the option shares upon
         the completion of thirty-six (36) months of Board service measured from
         the automatic grant date.

                                    (iv) The option shall become exercisable for
         the final  twenty-five  percent  (25%) of the  option  shares  upon the
         completion of  forty-eight  (48) months of Board service  measured from
         the automatic grant date.

                           The  annual  7,500-share  option  grant  made to each
re-elected  non-  employee  Board member shall  become  exercisable  for all the
option  shares  upon the  optionee's  completion  of twelve (12) months of Board
service measured from the automatic grant date.

                           As the  option  becomes  exercisable  for one or more
installments of the option shares, those installments shall accumulate,  and the
option shall  remain  exercisable  for the  accumulated  installments  until the
expiration or sooner termination of the option term. The option,  however, shall
not become exercisable for any additional option shares following the optionee's
cessation  of Board  service,  except to the extent the option is  otherwise  to
become  exercisable  in accordance  with the provisions of paragraph III of this
Article Three.

                  F. Limited  Transferability of Options. During the lifetime of
the optionee, the option shall only be exercisable by the optionee and shall not
be assignable or transferable  by the optionee  otherwise than by will or the by
the laws of descent and distribution  following the optionee's  death.  However,
each option  granted under this  Automatic  Option Grant Program on or after the
date of the 1997 Annual Stockholders

                                       16.
<PAGE>
Meeting shall be  assignable  in whole or in part by the optionee  during his or
her lifetime,  but only to the extent such assignment is made in connection with
the optionee's  estate plan to one or more members of the  optionee's  immediate
family  or to a  trust  established  exclusively  for one or  more  such  family
members. The assigned portion may only be exercised by the person or persons who
acquire a proprietary  interest in the option  pursuant to the  assignment.  The
terms  applicable  to the assigned  portion shall be the same as those in effect
for the option  immediately  prior to such  assignment and shall be set forth in
such  documents  issued  to the  assignee  as the  Plan  Administrator  may deem
appropriate.

                  G.       Effect of Termination of Board Membership.

                           1. Should the optionee cease to be a Board member for
any reason (other than death) while holding an automatic option grant under this
Article Three,  then such optionee shall have a six (6)-month  period  following
the date of such cessation of Board  membership in which to exercise such option
for any or all of the shares of Common Stock for which the option is exercisable
at the time the optionee ceases service as a Board member.

                           2. Should the optionee  die while  serving as a Board
member or during the six  (6)-month  period  following  his or her  cessation of
Board service, then the option may subsequently be exercised,  for any or all of
the shares of Common  Stock for which the option is  exercisable  at the time of
the optionee's cessation of Board membership,  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.  Any such exercise must, however,  occur within twelve
(12) months after the date of the optionee's death.

                           3. In no event shall any  automatic  grant under this
Article Three remain exercisable after the specified  expiration date of the ten
(10)-year option term. Upon the expiration of the applicable  exercise period in
accordance with  subparagraphs 1 and 2 above or (if earlier) upon the expiration
of the ten (10)-year  option term, the automatic grant shall terminate and cease
to be exercisable.

                  H. Stockholder Rights. The holder of an automatic option grant
under this Article  Three shall have no  stockholder  rights with respect to any
shares  covered by such option until such  individual  shall have  exercised the
option, paid the exercise price for the purchased shares and been issued a stock
certificate for such shares.

                  I. Remaining Terms. The remaining terms and conditions of each
automatic  option  grant  shall be as set forth in the  prototype  Non-statutory
Stock Option Agreement attached as Exhibit A to the Plan.


                                       17.
<PAGE>
      III.        CORPORATE TRANSACTION/CHANGE IN CONTROL/HOSTILE TAKE-
                  OVER

                  A. In connection with any Corporate  Transaction (as such term
is defined in paragraph III of Article Two, above),  the  exercisability of each
automatic option grant outstanding under this Article Three shall  automatically
accelerate  so that each such option shall,  immediately  prior to the specified
effective  date for the Corporate  Transaction,  become fully  exercisable  with
respect  to the total  number of shares of Common  Stock at the time  subject to
such option and may be exercised for all or any portion of such shares. Upon the
consummation  of the Corporate  Transaction,  all automatic  option grants under
this Article Three shall  terminate and cease to be  outstanding,  except to the
extent assumed by the successor corporation (or parent thereof).

                  B.  In   connection   with  any   Change  in  Control  of  the
Corporation,  the  exercisability  of each  automatic  option  grant at the time
outstanding under this Article Three shall automatically accelerate so that each
such option shall,  immediately  prior to the specified  effective  date for the
Change in Control,  become fully exercisable with respect to the total number of
shares of Common  Stock at the time  subject to such option and may be exercised
for all or any portion of such shares.  For purposes of this  Article  Three,  a
Change in Control shall be deemed to occur in the event:

                                    (i) any person or  related  group of persons
         (other than the  Corporation  or a person that  directly or  indirectly
         controls,  is  controlled  by, or is under  common  control  with,  the
         Corporation)  directly  or  indirectly  acquires  beneficial  ownership
         (within  the  meaning  of Rule  13d-3  of the 1934  Act) of  securities
         possessing  more than fifty percent (50%) of the total combined  voting
         power of the Corporation's  outstanding securities pursuant to a tender
         or exchange offer; or

                                    (ii) there is a change in the composition of
         the Board over a period of twenty-four (24) consecutive  months or less
         such that a majority of the Board members  ceases,  by reason of one or
         more proxy contests for the election of Board members,  to be comprised
         of  individuals  who either (A) have been  Board  members  continuously
         since  the  beginning  of such  period  or (B)  have  been  elected  or
         nominated for election as Board members  during such period by at least
         two-thirds of the Board members  described in clause (A) who were still
         in office at the time such election or  nomination  was approved by the
         Board.

                  C. Upon the occurrence of a Hostile Take-Over,  each automatic
option  grant  which  has  been  outstanding  under  this  Article  Three  shall
automatically  be  cancelled  in  return  for  a  cash   distribution  from  the
Corporation  in an amount equal to the excess of (i) the Take-Over  Price of the
shares of Common Stock at the time subject to the cancelled  option  (whether or
not the option is otherwise at the time exercisable for such shares) over

                                       18.
<PAGE>

(ii) the aggregate exercise price payable for such shares. The cash distribution
payable upon such cancellation  shall be made within five (5) days following the
consummation  of the  Hostile  Take-Over.  Stockholder  approval  of  this  1997
restatement  of  the  Plan  shall   constitute   pre-approval   of  each  option
subsequently  granted  with such an  automatic  cancellation  provision  and the
subsequent  cancellation  of that  option  in  accordance  with  the  terms  and
provisions  of  this  paragraph  III.C.  No  additional  approval  of  the  Plan
Administrator  or the Board shall be  required at the time of the actual  option
cancellation and cash distribution.

                  D. For purposes of this Article Three, Hostile Take-Over shall
have the meaning  assigned to such term in  paragraph  V.B of Article  Two.  The
Take-Over  Price per share shall be deemed to be equal to the greater of (a) the
fair market value per share on the date of cancellation,  as determined pursuant
to the  valuation  provisions  of  paragraph  I.A.3 of Article  Two,  or (b) the
highest reported price per share paid in effecting such Hostile Take-Over.

                  E. The shares of Common Stock subject to each option cancelled
in connection  with the Hostile  Take-Over shall not be available for subsequent
issuance under this Plan.

                  F. The automatic option grants  outstanding under this Article
Three shall in no way affect the right of the Corporation to adjust, reclassify,
reorganize  or otherwise  change its capital or business  structure or to merge,
consolidate,  dissolve,  liquidate  or sell or  transfer  all or any part of its
business or assets.



                                       19.
<PAGE>

                                  ARTICLE FOUR

                                  MISCELLANEOUS

        I.        AMENDMENT OF THE PLAN

                  The  Board  shall  have  complete  and  exclusive   power  and
authority  to  amend  or  modify  the  Plan in any or all  respects  whatsoever.
However,  no such amendment or  modification  shall,  without the consent of the
holders,  adversely affect rights and obligations with respect to options at the
time  outstanding  under the Plan. In addition,  certain  amendments may require
stockholder approval pursuant to applicable laws or regulations.

       II.        EFFECTIVE DATE AND TERM OF PLAN

                  A. The  Corporation's  1983 Stock  Option  Plan was  initially
adopted  by  the  Board  of  Directors  in  October  1983  and  approved  by the
Corporation's  stockholders  in November  1983.  In January  1987,  the Plan was
renamed the Komag,  Incorporated  1987 Stock Option Plan. The Board then amended
the Plan in May 1987 and such amendment was approved by the  stockholders at the
Annual Meeting held in May 1987. The Plan was subsequently  amended and restated
by the  Board  in  December  1987  and  January  1988,  respectively,  and  such
restatement  and  amendments  were  approved by the  stockholders  at the Annual
Meeting  held in June of 1988.  The Plan was  further  amended  by the  Board in
January 1991 and the amendment was approved by the stockholders in May 1991. The
January 23, 1992  restatement  of the Plan,  together with the  1,000,000  share
increase,  was approved by the Board on January 23, 1992 and became effective on
such date. The stockholders approved the January 23, 1992 restatement on May 21,
1992. On January 27, 1994,  the Board adopted an amendment  which  increased the
number  of  shares  of Common  Stock  issuable  under the Plan by an  additional
1,000,000  shares.  The increase was  approved by the  stockholders  at the 1994
Annual Meeting.

                  B. On January 24, 1995, the Board approved an amendment to the
Plan to effect the following changes to the Automatic Option Grant Program:  (i)
increase the number of shares subject to the initial automatic option grant made
to newly-elected or newly-appointed non-employee Board members from 3,500 shares
to 20,000 shares per  individual;  (ii) increase the number of shares subject to
the annual  automatic  option grant made to each re-elected  non-employee  Board
member from 3,500 shares to 5,000 shares;  and (iii) adjust the vesting schedule
in effect for each such annual  5,000-share  grant to provide  for full  vesting
upon completion of one (1) year of Board service rather than annual vesting over
a four (4)-year  period.  The  amendments to the Automatic  Option Grant Program
were approved by the stockholders at the 1995 Annual Meeting.


                                       20.
<PAGE>

                  C. In January 1996 the Board approved an amendment to the Plan
to (i) eliminate the discretion of the Plan Administrator to grant options under
the  Discretionary  Option Grant  Program with an exercise  price per share less
than 100% of the fair market  value per share of Common Stock on the grant date,
(ii)  eliminate  the loan  provisions  of the Plan pursuant to which one or more
holders of options  under the  Discretionary  Option  Grant  Program  would have
otherwise had the  opportunity to finance the exercise of those options  through
the delivery of  full-recourse  promissory  notes,  (iii) increase the number of
shares of Common Stock  reserved  for  issuance  over the term of the Plan by an
additional  3,000,000  shares and (iv)  adjust  the number of shares  granted to
non-employee  Board members.  The clause (iii) and (iv) amendments were approved
by the stockholders at the 1996 Annual Meeting.

                  D. In March 1997 the Board  amended and  restated  the Plan to
effect the  following  revisions:  (i)  increase  the number of shares of Common
Stock reserved for issuance over the term of the Plan by an additional 2,500,000
shares,  (ii) render the  non-employee  Board members eligible to receive option
grants under the Discretionary Option Grant Program, (iii) allow unvested shares
issued under the Plan and  subsequently  repurchased  by the  Corporation at the
option  exercise  price or issue price paid per share to be  reissued  under the
Plan, (iv) remove certain  restrictions on the eligibility of non-employee Board
members to serve as Plan  Administrator  and (v)  effect a series of  additional
changes  to the  provisions  of the Plan  (including  the  stockholder  approval
requirements) in order to take advantage of the recent  amendments to Rule 16b-3
of the  Securities  Exchange  Act of 1934,  as amended,  which  exempts  certain
officer and director  transactions under the Plan from the short-swing liability
provisions of the federal  securities  laws. The 1997 restatement of the Plan is
subject to stockholder approval at the 1997 Annual Meeting.

                  E. The special sale and remittance  procedure for the exercise
of  outstanding  options  under the Plan,  which  was  approved  by the Board in
January 1991,  shall be in effect for all options  outstanding as of January 24,
1991 which  already  include such  procedure as a method of exercise and for all
options  granted after January 24, 1991. In addition,  such  procedure  shall be
available for all non-qualified options currently held by officers and directors
which  do not  otherwise  include  such  procedure  and  for  any  disqualifying
dispositions of Incentive Option shares effected after January 24, 1991.

                  F. The  provisions  of each  restatement  and amendment of the
Plan apply only to stock options and stock appreciation rights granted under the
Plan from and after the effective  date of such  restatement  or amendment.  All
stock options and stock  appreciation  rights issued and  outstanding  under the
Plan  immediately  prior to such effective date shall continue to be governed by
the terms and conditions of the Plan (and the respective  instruments evidencing
each such option or stock appreciation right) as in effect on the date each such
option or stock appreciation right was previously granted, and nothing

                                       21.

<PAGE>

in any such  restatement  or  amendment  shall be deemed to affect or  otherwise
modify  the  rights or  obligations  of the  holders  of such  options  or stock
appreciation  rights with respect to their acquisition of shares of Common Stock
under such options or their exercise of such stock appreciation rights.

                  G. Unless sooner  terminated in accordance  with paragraph III
of  Articles  Two and Three,  the Plan shall  terminate  upon the earlier of (i)
January 22,  2002 or (ii) the date on which all shares  available  for  issuance
under the Plan shall have been issued or  cancelled  pursuant to the exercise or
surrender of options granted hereunder. If the date of termination is determined
under  clause  (i) above,  then  options  outstanding  on such date shall not be
affected  by the  termination  of the Plan and shall  continue to have force and
effect in accordance  with the  provisions of the  instruments  evidencing  such
options.

                  H. Options may be granted  under this Plan to purchase  shares
of Common  Stock in excess of the number of shares then  available  for issuance
under the Plan,  provided (i) an  amendment  to increase  the maximum  number of
shares  issuable  under the Plan is  adopted by the Board  prior to the  initial
grant  of any such  option  and is  thereafter  submitted  to the  Corporation's
stockholders  for  approval  and (ii) each  option so  granted  is not to become
exercisable,  in whole or in part,  at any time prior to the  obtaining  of such
stockholder approval.

      III.        USE OF PROCEEDS

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

       IV.        TAX WITHHOLDING

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

        V.        NO EMPLOYMENT/SERVICE RIGHTS

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


                                       22.
<PAGE>

       VI.        REGULATORY APPROVALS

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


                                       23.

<PAGE>



                                    EXHIBIT A

                              Non-Employee Director

                      Non-Statutory Stock Option Agreement





                                    EXHIBIT A

                               KOMAG, INCORPORATED
                  NON-EMPLOYEE DIRECTOR STOCK OPTION AGREEMENT

                              INITIAL OPTION GRANT

RECITALS

                  A. The  Corporation  has  approved an  automatic  option grant
program under the Restated 1987 Stock Option Plan (the "Plan") pursuant to which
the non-employee  members of the Corporation's  Board of Directors (the "Board")
will  automatically  receive  periodic option grants designed to reward them for
services they have rendered to the Corporation and to encourage them to continue
in the service of the Corporation.

                  B. Optionee is a  non-employee  member of the Board,  and this
Agreement is executed pursuant to, and is intended to carry out the purposes of,
the Plan in connection with the automatic grant on this day of a stock option to
purchase  shares of the  Corporation's  common stock,  $0.01 par value  ("Common
Stock"), under the Plan.

                  C. The granted option is intended to be a non-statutory option
which does not meet the  requirements  of Section  422 of the  Internal  Revenue
Code.

                  NOW, THEREFORE, it is hereby agreed as follows:

                  1.  Grant  of  Option.  Subject  to and  upon  the  terms  and
conditions set forth in this  Agreement and in the notice of grant  accompanying
this Agreement  ("Notice of Grant"),  there is hereby  automatically  granted to
Optionee,  as of the date of grant  specified in the Notice of Grant (the "Grant
Date"),  a  stock  option  to  purchase  up to  the  number  of  shares  of  the
Corporation's  Common Stock (the "Option  Shares") as is specified in the Notice
of Grant at the price per share (the "Option Price")  specified in the Notice of
Grant  which is one  hundred  percent  (100%)  of the fair  market  value of the
Corporation's Common Stock on the grant date.

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

                  3.  Limited  Transferability.  This option may, in  connection
with  optionee's  estate  plan,  be  assigned  in  whole or in part  during  the
optionee's lifetime to one or more members of the optionee's immediate family or
to a trust  established  exclusively  for one or more such family  members.  The
assigned  portion may only be  exercised  by the person or persons who acquire a
proprietary interest in the option pursuant to the assignment. The


<PAGE>

terms  applicable  to the assigned  portion shall be the same as those in effect
for the option  immediately  prior to such  assignment and shall be set forth in
such documents issued to the assignee as the  administrator of the Plan may deem
appropriate. Should the Optionee die while holding this option, then this option
shall  be  transferred  in  accordance  with  Optionee's  will  or the  laws  of
inheritance.

                  4. Dates of Exercise. This option shall become exercisable for
the Option  Shares in a series of four (4)  successive  annual  installments  as
follows:

                           (i) The option shall become  exercisable  for twenty-
         five percent (25%) of the Option  Shares upon the  completion of twelve
         (12) months of Board service measured from the automatic grant date.

                           (ii)  The  option  shall  become  exercisable  for an
         additional  twenty-five  percent  (25%) of the Option  Shares  upon the
         completion of  twenty-four  (24) months of Board service  measured from
         the automatic grant date.

                           (iii) The  option  shall  become  exercisable  for an
         additional  twenty-five  percent  (25%) of the Option  Shares  upon the
         completion of thirty-six (36) months of Board service measured from the
         automatic grant date.

                           (iv) The  option  shall  become  exercisable  for the
         final  twenty-five   percent  (25%)  of  the  Option  Shares  upon  the
         completion of  forty-eight  (48) months of Board service  measured from
         the automatic grant date.

                           As the  option  becomes  exercisable  for one or more
installments of the Option Shares, those installments shall accumulate,  and the
option shall  remain  exercisable  for the  accumulated  installments  until the
expiration or sooner termination of the option term.

                  5.  Termination  of Board  Membership.  Should the  Optionee's
service as a Board member cease while this option remains outstanding,  then the
option term  specified  in  Paragraph 2 shall  terminate  (and this option shall
cease to remain outstanding) prior to the Expiration Date in accordance with the
following provisions:

                           (i) Should  Optionee  cease to be a Board  member for
         any reason other than death while holding this option,  then the period
         for exercising  this option shall be reduced to a six (6)-month  period
         commencing with the date of such cessation of Board membership,  but in
         no event  shall  this  option  be  exercisable  at any time  after  the
         Expiration  Date.  During such limited period of  exercisability,  this
         option may not be exercised in the  aggregate  for more than the number
         of Option Shares (if any) for which it is

                                       2.
<PAGE>

         exercisable on the date the Optionee  ceased service as a Board member.
         Upon the  expiration of such six (6)-month  period or (if earlier) upon
         the  specified  Expiration  Date of the option  term,  the option shall
         terminate and cease to be exercisable.

                           (ii)  Should  Optionee  die while  serving as a Board
         member  or  during  the  six  (6)-month  period  following  his  or her
         cessation of Board  service,  then the personal  representative  of the
         Optionee's  estate  or 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  shall have the right to exercise this
         option for any or all of the  Option  Shares for which the option is at
         the time exercisable.  Such right of exercise shall terminate, and this
         option shall accordingly  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 specified  Expiration  Date of the
         option term.

                  6.       Adjustment in Option Shares.

                  A.  In the  event  any  change  is made  to the  Common  Stock
issuable  under the Plan  (whether  by reason of (i)  merger,  consolidation  or
reorganization   or  (ii)   recapitalization,   stock  dividend,   stock  split,
combination of shares,  exchange of shares or other similar change affecting the
outstanding  Common Stock as a class without  receipt of  consideration),  then,
unless  such  change  results  in the  termination  of all  outstanding  options
pursuant to the  provisions  of  paragraph  III of Articles Two and Three of the
Plan, the number and class of securities  purchasable  under this option and the
Option Price  payable per share shall be  appropriately  adjusted to prevent the
dilution or enlargement of the Optionee's rights and benefits hereunder.

                  B. 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 Option Price,
provided the aggregate Option Price shall remain the same.

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

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


                                       3.
<PAGE>

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

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

                           this option,  to the extent  outstanding at the time,
shall automatically  accelerate so that such option shall,  immediately prior to
the  specified  effective  date  for the  Corporate  Transaction,  become  fully
exercisable  for all of the Option  Shares at the time subject to the option and
may be exercised for any or all of those Option Shares as  fully-vested  shares.
Immediately following the consummation of the Corporate Transaction, this option
shall terminate and cease to be outstanding, except to the extent assumed by the
successor corporation (or parent thereof).

                  8.       Change In Control/Hostile Takeover.

                  A. Immediately  prior to the occurrence of a Change in Control
as defined below,  this option,  to the extent  outstanding  at the time,  shall
automatically  accelerate  and  become  immediately  exercisable  for all of the
Option  Shares at the time subject to the option and may be exercised for any or
all of those  Option  Shares as  fully-vested  shares.  The option  shall remain
exercisable for such fully-vested  shares until the earlier of (i) the specified
Expiration  Date of the  option  term  or (ii)  the  termination  of the  option
pursuant to the provisions of Paragraph 5.

                  B. Upon the  occurrence  of a  Hostile  Takeover  (as  defined
below),  this option  shall be  automatically  cancelled  in exchange for a cash
payment  from  the  Corporation  in an  amount  equal to the  excess  of (I) the
Take-Over  Price of all the Option  Shares at the time subject to the  cancelled
option over (II) the aggregate  Option Price  payable for such shares.  The cash
payment  shall be made within five (5) days  following the  consummation  of the
Hostile Take-Over.

                  C. For purposes of this Paragraph 8, the following definitions
shall be in effect:

                                    A Change in Control shall be deemed to occur
         in the event:

                                    (i) any person or  related  group of persons
         (other than the  Corporation  or a person that  directly or  indirectly
         controls,  is  controlled  by, or is under  common  control  with,  the
         Corporation)  directly  or  indirectly  acquires  beneficial  ownership
         (within the  meaning of Rule 13d-3 of the  Securities  Exchange  Act of
         1934) of  securities  possessing  more than fifty  percent (50%) of the
         total combined voting power of the Corporation's

                                       4.
<PAGE>
         outstanding  securities  pursuant  to a tender or  exchange  offer made
         directly to the Corporation's stockholders; or

                                    (ii) there is a change in the composition of
         the Board over a period of twenty-four (24) consecutive  months or less
         such that a majority of the Board members  ceases,  by reason of one or
         more proxy contests for the election of Board members,  to be comprised
         of  individuals  who either (A) have been  Board  members  continuously
         since  the  beginning  of such  period  or (B)  have  been  elected  or
         nominated for election as Board members  during such period by at least
         two-thirds of the Board members  described in clause (A) who were still
         in office at the time such election or  nomination  was approved by the
         Board.

                                    A Hostile Take-Over shall be deemed to occur
         in the event any person or related  group of  persons  (other  than the
         Corporation  or a person  that  directly  or  indirectly  controls,  is
         controlled  by,  or is under  common  control  with,  the  Corporation)
         directly  or  indirectly  acquires  beneficial  ownership  (within  the
         meaning  of Rule  13d-3  of the  Securities  Exchange  Act of  1934) of
         securities  possessing  more  than  fifty  percent  (50%) of the  total
         combined  voting  power  of the  Corporation's  outstanding  securities
         pursuant  to a tender  or  exchange  offer  which  the  Board  does not
         recommend the Corporation's stockholders to accept.

                                    The  Take-Over  Price  per  share  shall  be
         deemed  to be equal to the  greater  of (a) the Fair  Market  Value per
         share  on the  date  of the  option  cancellation  or (b)  the  highest
         reported price per share paid in effecting such Hostile Take-Over.

                  9.       Manner of Exercising Option.

                  A. In order to exercise this option for all or any part of the
Option Shares,  Optionee (or in the case of exercise after Optionee's death, the
Optionee's  executor,  administrator,  heir or legatee, as the case may be) must
take the following actions:

                                    (i) Either  provide the Stock  Administrator
         of the  Corporation  (or his/her  designee)  with written notice of the
         exercise in which there is  specified  the number of Option  Shares for
         which the option is being  exercised or initiate  the exercise  through
         the    interactive     response    system     established     with    a
         Corporation-designated brokerage firm.

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


                                       5.
<PAGE>

                                    1. full  payment  in cash or check  drawn to
         the Corporation's order; or

                                    2. full  payment  in shares of Common  Stock
         held by the  Optionee  for the  requisite  period  necessary to avoid a
         charge to the Corporation's  reported earnings for financial  reporting
         purposes and valued at Fair Market Value on the Exercise Date; or

                                    3. full  payment  through a  combination  of
         shares of Common Stock held by the Optionee  for the  requisite  period
         necessary to avoid a charge to the Corporation's  reported earnings for
         financial  reporting  purposes  and valued at Fair Market  Value on the
         Exercise  Date and cash or check,  equal to the aggregate of the Option
         Price; or

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

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

                  B. For  purposes  of  subparagraph  A above  and for all other
valuation  purposes  under this  Agreement,  the Fair Market  Value per share of
Common Stock on any relevant date shall be  determined  in  accordance  with the
following provisions:

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

                                       6.
<PAGE>
                                    (ii)  If the  Common  Stock  is at the  time
         listed on either  the New York Stock  Exchange  or the  American  Stock
         Exchange, then the Fair Market Value shall be the closing selling price
         per share of Common Stock on the date in question on such exchange,  as
         such price is officially  quoted in the composite tape of  transactions
         on that exchange.  If there is no closing  selling price for the Common
         Stock on the date in question,  then the Fair Market Value shall be the
         closing  selling  price  on the last  preceding  date  for  which  such
         quotation exists.

                  C. The Exercise Date shall be the first date on which there is
compliance  with all the terms and  conditions  of  subparagraphs  A and B above
applicable to such exercise.

                  D.  As  soon  as  practical   after  the  Exercise  Date,  the
Corporation  shall issue to or on behalf of the Optionee (or any other person or
persons  exercising this option) a certificate or certificates  representing the
Option Shares purchased and paid for in accordance herewith.

                  E. In no event may this option be exercised for any fractional
share.

                  10.  Stockholder  Rights.  The holder of this option shall not
have any of the rights of a stockholder  with respect to the Option Shares until
such individual shall have exercised this option,  paid the Option Price for the
purchased  shares and been  issued one or more  certificates  for the  purchased
shares.

                  11. No Impairment of Rights.  This Agreement  shall not in any
way affect the right of the  Corporation  to adjust,  reclassify,  reorganize or
otherwise  make  changes  in its  capital  or  business  structure  or to merge,
consolidate,  dissolve,  liquidate  or sell or  transfer  all or any part of its
business  or  assets.  Nor  shall  this  Agreement  in any way be  construed  or
interpreted  so as to affect  adversely  or otherwise  impair the  Corporation's
right to remove the Optionee from the Board at any time in  accordance  with the
provisions of applicable law.

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


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

                  14.  Discharge of Liability.  The inability of the Corporation
to obtain  approval  from any  regulatory  body having  authority  deemed by the
Corporation to be necessary to the lawful  issuance and sale of any Common Stock
pursuant to this option shall  relieve the  Corporation  of any  liability  with
respect  to the  non-issuance  or sale of the  Common  Stock  as to  which  such
approval shall not have been obtained.  However,  the Corporation  shall use its
best efforts to obtain all such applicable approvals.

                  15.  Notices.  Any notice required to be given or delivered to
the  Corporation  under  the terms of this  Agreement  shall be in  writing  and
addressed to the Corporation in care of the Stock Administrator at the Corporate
Offices at 1704  Automation  Parkway,  San Jose,  California  95131.  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
Notice of Grant.  All  notices  shall be deemed to have been given or  delivered
upon personal  delivery or upon deposit in the U.S.  mail,  postage  prepaid and
properly addressed to the party to be notified.

                  16.  Construction/Governing Law. This Agreement and the option
evidenced  hereby  are  made  and  granted  pursuant  to the Plan and are in all
respects limited by and subject to the express terms and provisions of the Plan.
The  interpretation,  performance,  and  enforcement of this Agreement  shall be
governed by the laws of the State of California.



                                       8.


                                    EXHIBIT A

                               KOMAG, INCORPORATED
                  NON-EMPLOYEE DIRECTOR STOCK OPTION AGREEMENT

                               ANNUAL OPTION GRANT

RECITALS

                  A. The  Corporation  has  approved an  automatic  option grant
program under the Restated 1987 Stock Option Plan (the "Plan") pursuant to which
the non-employee  members of the Corporation's  Board of Directors (the "Board")
will  automatically  receive  periodic option grants designed to reward them for
services they have rendered to the Corporation and to encourage them to continue
in the service of the Corporation.

                  B. Optionee is a  non-employee  member of the Board,  and this
Agreement is executed pursuant to, and is intended to carry out the purposes of,
the Plan in connection with the automatic grant on this day of a stock option to
purchase  shares of the  Corporation's  common stock,  $0.01 par value  ("Common
Stock"), under the Plan.

                  C. The granted option is intended to be a non-statutory option
which does not meet the  requirements  of Section  422 of the  Internal  Revenue
Code.

                  NOW, THEREFORE, it is hereby agreed as follows:

                  1.  Grant  of  Option.  Subject  to and  upon  the  terms  and
conditions set forth in this  Agreement and in the notice of grant  accompanying
this Agreement  ("Notice of Grant"),  there is hereby  automatically  granted to
Optionee,  as of the date of grant  specified in the Notice of Grant (the "Grant
Date"),  a  stock  option  to  purchase  up to  the  number  of  shares  of  the
Corporation's  Common Stock (the "Option  Shares") as is specified in the Notice
of Grant at the price per share (the "Option Price")  specified in the Notice of
Grant  which is one  hundred  percent  (100%)  of the fair  market  value of the
Corporation's Common Stock on the grant date.

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

                  3.  Limited  Transferability.  This option may, in  connection
with  optionee's  estate  plan,  be  assigned  in  whole or in part  during  the
optionee's lifetime to one or more members of the optionee's immediate family or
to a trust  established  exclusively  for one or more such family  members.  The
assigned  portion may only be  exercised  by the person or persons who acquire a
proprietary interest in the option pursuant to the assignment. The

<PAGE>

terms  applicable  to the assigned  portion shall be the same as those in effect
for the option  immediately  prior to such  assignment and shall be set forth in
such documents issued to the assignee as the  administrator of the Plan may deem
appropriate. Should the Optionee die while holding this option, then this option
shall  be  transferred  in  accordance  with  Optionee's  will  or the  laws  of
inheritance.

                  4. Dates of Exercise.  The option shall become exercisable for
all the  Option  Shares  upon  the  Optionee's  completion  of one  (1)  year of
continuous  service as a Board member,  measured from the automatic  grant date.
Once the option  becomes  exercisable  for the Option  Shares,  the option shall
remain so exercisable  until the expiration or sooner  termination of the option
term.

                  5.  Termination  of Board  Membership.  Should the  Optionee's
service as a Board member cease while this option remains outstanding,  then the
option term  specified  in  Paragraph 2 shall  terminate  (and this option shall
cease to remain outstanding) prior to the Expiration Date in accordance with the
following provisions:

                           (i) Should  Optionee  cease to be a Board  member for
         any reason other than death while holding this option,  then the period
         for exercising  this option shall be reduced to a six (6)-month  period
         commencing with the date of such cessation of Board membership,  but in
         no event  shall  this  option  be  exercisable  at any time  after  the
         Expiration  Date.  During such limited period of  exercisability,  this
         option may not be exercised in the  aggregate  for more than the number
         of Option Shares (if any) for which it is  exercisable  on the date the
         Optionee ceased service as a Board member.  Upon the expiration of such
         six (6)-month period or (if earlier) upon the specified Expiration Date
         of the  option  term,  the  option  shall  terminate  and  cease  to be
         exercisable.

                           (ii)  Should  Optionee  die while  serving as a Board
         member or during the six (6) months  following  his or her cessation of
         Board  service,  then the  personal  representative  of the  Optionee's
         estate  or 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  shall have the right to exercise this option
         for any or all of the Option Shares for which the option is at the time
         exercisable.  Such right of exercise shall  terminate,  and this option
         shall accordingly 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  specified  Expiration  Date of the option
         term.


                                       2.
<PAGE>

                  6.       Adjustment in Option Shares.

                  A.  In the  event  any  change  is made  to the  Common  Stock
issuable  under the Plan  (whether  by reason of (i)  merger,  consolidation  or
reorganization   or  (ii)   recapitalization,   stock  dividend,   stock  split,
combination of shares,  exchange of shares or other similar change affecting the
outstanding  Common Stock as a class without  receipt of  consideration),  then,
unless  such  change  results  in the  termination  of all  outstanding  options
pursuant to the  provisions  of  paragraph  III of Articles Two and Three of the
Plan, the number and class of securities  purchasable  under this option and the
Option Price  payable per share shall be  appropriately  adjusted to prevent the
dilution or enlargement of the Optionee's rights and benefits hereunder.

                  B. 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 Option Price,
provided the aggregate Option Price shall remain the same.

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

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

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

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

                  this  option,  to the extent  outstanding  at the time,  shall
automatically  accelerate  so that such option shall,  immediately  prior to the
specified effective date for the Corporate Transaction, become fully exercisable
for all of the  Option  Shares  at the time  subject  to the  option  and may be
exercised  for  any  or all of  those  Option  Shares  as  fully-vested  shares.
Immediately following the consummation of the 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>

                  8.       Change In Control/Hostile Takeover.

                  A. Immediately  prior to the occurrence of a Change in Control
as defined below,  this option,  to the extent  outstanding  at the time,  shall
automatically  accelerate  and  become  immediately  exercisable  for all of the
Option  Shares at the time subject to the option and may be exercised for any or
all of those  Option  Shares as  fully-vested  shares.  The option  shall remain
exercisable for such fully-vested  shares until the earlier of (i) the specified
Expiration  Date of the  option  term  or (ii)  the  termination  of the  option
pursuant to the provisions of Paragraph 5.

                  B. Upon the  occurrence  of a  Hostile  Takeover  (as  defined
below),  this option  shall be  automatically  cancelled  in exchange for a cash
payment  from  the  Corporation  in an  amount  equal to the  excess  of (I) the
Take-Over  Price of all the Option  Shares at the time subject to the  cancelled
option over (II) the aggregate  Option Price  payable for such shares.  The cash
payment  shall be made within five (5) days  following the  consummation  of the
Hostile Take-Over.

                  C. For purposes of this Paragraph 8, the following definitions
shall be in effect:

                           A Change in  Control  shall be deemed to occur in the
         event:

                           (i) any  person or related  group of  persons  (other
         than the Corporation or a person that directly or indirectly  controls,
         is controlled  by, or is under common  control with,  the  Corporation)
         directly  or  indirectly  acquires  beneficial  ownership  (within  the
         meaning  of Rule  13d-3  of the  Securities  Exchange  Act of  1934) of
         securities  possessing  more  than  fifty  percent  (50%) of the  total
         combined  voting  power  of the  Corporation's  outstanding  securities
         pursuant  to  a  tender  or  exchange   offer  made   directly  to  the
         Corporation's stockholders; or

                           (ii)  there is a  change  in the  composition  of the
         Board over a period of twenty-four (24) consecutive months or less such
         that a majority of the Board members  ceases,  by reason of one or more
         proxy  contests for the election of Board  members,  to be comprised of
         individuals who either (A) have been Board members  continuously  since
         the  beginning of such period or (B) have been elected or nominated for
         election as Board members during such period by at least  two-thirds of
         the Board  members  described in clause (A) who were still in office at
         the time such election or nomination was approved by the Board.


                                       4.
<PAGE>

                           A Hostile  Take-Over  shall be deemed to occur in the
event any person or related group of persons  (other than the  Corporation  or a
person that  directly or  indirectly  controls,  is  controlled  by, or is under
common control with, the Corporation) directly or indirectly acquires beneficial
ownership  (within the meaning of Rule 13d-3 of the  Securities  Exchange Act of
1934) of  securities  possessing  more  than  fifty  percent  (50%) of the total
combined voting power of the Corporation's  outstanding securities pursuant to a
tender or exchange  offer which the Board does not recommend  the  Corporation's
stockholders to accept.

                           The  Take-Over  Price per share shall be deemed to be
equal to the greater of (a) the Fair  Market  Value per share on the date of the
option  cancellation  or (b)  the  highest  reported  price  per  share  paid in
effecting such Hostile Take-Over.

                  9.       Manner of Exercising Option.

                  A. In order to exercise this option for all or any part of the
Option Shares,  Optionee (or in the case of exercise after Optionee's death, the
Optionee's  executor,  administrator,  heir or legatee, as the case may be) must
take the following actions:

                           (i) Either  provide  the Stock  Administrator  of the
         Corporation  (or his/her  designee) with written notice of the exercise
         in which there is specified  the number of Option  Shares for which the
         option  is  being  exercised  or  initiate  the  exercise  through  the
         interactive  response system established with a  Corporation-designated
         brokerage firm.

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

                                    1. full  payment  in cash or check  drawn to
         the Corporation's order; or

                                    2. full  payment  in shares of Common  Stock
         held by the  Optionee  for the  requisite  period  necessary to avoid a
         charge to the Corporation's  reported earnings for financial  reporting
         purposes and valued at Fair Market Value on the Exercise Date; or

                                    3. full  payment  through a  combination  of
         shares of Common Stock held by the Optionee  for the  requisite  period
         necessary to avoid a charge to the Corporation's  reported earnings for
         financial  reporting  purposes  and valued at Fair Market  Value on the
         Exercise  Date and cash or check,  equal in the aggregate to the Option
         Price; or


                                       5.

<PAGE>

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

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

                  B. For  purposes  of  subparagraph  A above  and for all other
valuation  purposes  under this  Agreement,  the Fair Market  Value per share of
Common Stock on any relevant date shall be  determined  in  accordance  with the
following provisions:

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

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

                  C. The Exercise Date shall be the first date on which there is
compliance  with all the terms and  conditions  of  subparagraphs  A and B above
applicable to such exercise.


                                       6.

<PAGE>

                  D.  As  soon  as  practical   after  the  Exercise  Date,  the
Corporation  shall issue to or on behalf of the Optionee (or any other person or
persons  exercising this option) a certificate or certificates  representing the
Option Shares purchased and paid for in accordance herewith.

                  E. In no event may this option be exercised for any fractional
share.

                  10.  Stockholder  Rights.  The holder of this option shall not
have any of the rights of a stockholder  with respect to the Option Shares until
such individual shall have exercised this option,  paid the Option Price for the
purchased  shares and been  issued one or more  certificates  for the  purchased
shares.

                  11. No Impairment of Rights.  This Agreement  shall not in any
way affect the right of the  Corporation  to adjust,  reclassify,  reorganize or
otherwise  make  changes  in its  capital  or  business  structure  or to merge,
consolidate,  dissolve,  liquidate  or sell or  transfer  all or any part of its
business  or  assets.  Nor  shall  this  Agreement  in any way be  construed  or
interpreted  so as to affect  adversely  or otherwise  impair the  Corporation's
right to remove the Optionee from the Board at any time in  accordance  with the
provisions of applicable law.

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

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

                  14.  Discharge of Liability.  The inability of the Corporation
to obtain  approval  from any  regulatory  body having  authority  deemed by the
Corporation to be necessary to the lawful  issuance and sale of any Common Stock
pursuant to this option shall  relieve the  Corporation  of any  liability  with
respect  to the  non-issuance  or sale of the  Common  Stock  as to  which  such
approval shall not have been obtained.  However,  the Corporation  shall use its
best efforts to obtain all such applicable approvals.

                  15.  Notices.  Any notice required to be given or delivered to
the  Corporation  under  the terms of this  Agreement  shall be in  writing  and
addressed to the Corporation in care of the Stock Administrator at the Corporate
Offices at 1704  Automation  Parkway,  San Jose,  California  95131.  Any notice
required to be given or delivered to Optionee  shall be in writing and addressed
to Optionee at the address indicated below

                                       7.
<PAGE>

Optionee's signature line on the Notice of Grant. All notices shall be deemed to
have been given or delivered upon personal  delivery or upon deposit in the U.S.
mail, postage prepaid and properly addressed to the party to be notified.

                  16.  Construction/Governing Law. This Agreement and the option
evidenced  hereby  are  made  and  granted  pursuant  to the Plan and are in all
respects limited by and subject to the express terms and provisions of the Plan.
The  interpretation,  performance,  and  enforcement of this Agreement  shall be
governed by the laws of the State of California.



                                       8.

                               KOMAG, INCORPORATED
                        1988 EMPLOYEE STOCK PURCHASE PLAN

                                 PLAN AMENDMENT

                  The Komag,  Incorporated 1988 Employee Stock Purchase Plan, as
restated June 29, 1992 and amended as of June 28, 1996 (the "Purchase Plan"), is
hereby amended, effective as of January 22, 1997, as follows:

                  1.  Paragraph  (a) of Article VI is hereby  amended to read as
follows:

                           (a) The Stock  purchasable by Participants  under the
         Plan shall,  solely in the Board's  discretion,  be made available from
         either   authorized  but  unissued  Stock  or  from  reacquired  Stock,
         including  shares  of Stock  purchased  on the open  market.  The total
         number of shares of Stock which may be issued  under the Plan shall not
         exceed 3,550,000 shares1 (subject to adjustment under Section VI(b)).

                  2.  Paragraph  (c) of Article XI is hereby  amended to read as
follows:

                           (c) The Plan shall  terminate upon the earlier of (i)
         December 31, 20012 or (ii) the date on which all shares  available  for
         issuance  under the Plan  shall  have been sold  pursuant  to  purchase
         rights exercised under the Plan.

                  3. Except as modified  by this Plan  Amendment,  all the terms
and provisions of the Plan (as  previously  restated and amended) shall continue
in full force and effect.

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         1 Includes a 750,000-share  increase authorized by the Board on January
22, 1997, subject to stockholder  approval at the 1997 Annual Meeting. No shares
shall be issued on the basis of such increase unless such  stockholder  approval
is obtained.

         2 The  three-year  extension  of the  term  of the  Purchase  Plan  was
authorized by the Board on January 22, 1997, subject to stockholder  approval at
the 1997 Annual Meeting.




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