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                                                                   Exhibit 10.27

                    AMENDMENT TO THE UCAR INTERNATIONAL INC.
            MANAGEMENT STOCK OPTION PLAN (SENIOR MANAGEMENT VERSION)

         The Management Stock Option Plan (Senior Management  Version) is hereby
         amended, effective as of June 29, 2000, as follows:

                  The  definition  of "CHANGE OF CONTROL"  is hereby  amended to
                  read in its entirety as follows:

                 ""CHANGE  OF  CONTROL"  shall mean the occurrence of any of the
                  following events:

                           (i) any  "person"  or "group"  within the  meaning of
                  Section  13(d) or 14(d)(2) of the  Securities  Exchange Act of
                  1934 (the "Act") becomes the  beneficial  owner of 15% or more
                  of the  then  outstanding  Common  Stock or 15% or more of the
                  then outstanding voting securities of the Company;

                           (ii)any  "person"  or "group"  within the  meaning of
                  Section  13(d) or  14(d)(2)  of the Act  acquires  by proxy or
                  otherwise  the right to vote on any  matter or  question  with
                  respect to 15% or more of the then outstanding Common Stock or
                  15%  or  more  of  the  combined  voting  power  of  the  then
                  outstanding voting securities of the Company;

                           (iii) Present  Directors and New Directors  cease for
                  any reason to  constitute  a majority of the Board  (and,  for
                  purposes of this clause (iii),  "Present Directors" shall mean
                  individuals   who  at  the   beginning   of  any   consecutive
                  twenty-four  month  period were  members of the Board and "New
                  Directors" shall mean individuals  whose election by the Board
                  or whose nomination for election as directors by the Company's
                  stockholders  was approved by a vote of at least two-thirds of
                  the directors then in office who were Present Directors or New
                  Directors);

                           (iv)  the stockholders of the Company  approve a plan
                  of complete  liquidation or dissolution of the Company; or

                           (v) consummation of:

                               (x)     a     reorganization,      restructuring,
                  recapitalization,  reincorporation, merger or consolidation of
                  the Company (a "Business Combination") unless,  following such
                  Business  Combination,  (a)  all or  substantially  all of the
                  individuals and entities who were the beneficial owners of the
                  Common  Stock  and  the  voting   securities  of  the  Company
                  outstanding  immediately  prior to such  Business  Combination
                  beneficially own, directly or indirectly, more than 50% of the
                  common equity  securities and the combined voting power of the
                  voting securities of the corporation or other entity resulting
                  from such Business Combination outstanding after such Business
                  Combination (including,  without limitation,  a corporation or

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                  other  entity which as a result of such  Business  Combination
                  owns the Company or all or substantially  all of the assets of
                  the  Company  or the Group  (and,  for  purposes  hereof,  the
                  "Group"   refers  to  the   Company   and  its   Subsidiaries,
                  collectively)   either   directly   or  through  one  or  more
                  subsidiaries) in  substantially  the same proportions as their
                  ownership  immediately  prior to such Business  Combination of
                  outstanding  Common Stock and the combined voting power of the
                  outstanding  voting  securities of the Company,  respectively,
                  (b) no "person" or "group" within the meaning of Section 13(d)
                  or 14(d)(2) of the Act (excluding (1) any corporation or other
                  entity  resulting from such Business  Combination  and (2) any
                  employee  benefit plan (or related  trust) of the Group or any
                  corporation  or other  entity  resulting  from  such  Business
                  Combination)  beneficially  owns  15% or  more  of the  common
                  equity  securities or 15% or more of the combined voting power
                  of the voting  securities of the  corporation  or other entity
                  resulting  from such Business  Combination  outstanding  after
                  such  Business  Combination,  except to the  extent  that such
                  beneficial   ownership   existed   prior   to  such   Business
                  Combination  with  respect to the Common  Stock and the voting
                  securities of the Company,  and (c) at least a majority of the
                  members of the board of directors (or similar  governing body)
                  of  the  corporation  or  other  entity  resulting  from  such
                  Business  Combination were members of the Board at the time of
                  the  execution  of the initial  agreement  providing  for such
                  Business Combination or at the time of the action of the Board
                  approving such Business Combination, whichever is earlier; or

                               (y) any sale,  lease,  exchange or other transfer
                  (in one  transaction or a series of related  transactions)  of
                  all or  substantially  all of the assets of the Company or the
                  Group, whether held directly or indirectly through one or more
                  subsidiaries  (excluding  any  pledge,   mortgage,   grant  of
                  security interest,  sale-leaseback or similar transaction, but
                  including any foreclosure sale), provided,  that, for purposes
                  of clauses (v) (x) and (v) (y) above,  the divestiture of less
                  than  substantially  all of the  assets of the  Company or the
                  Group in one transaction or a series of related  transactions,
                  whether effected by sale, lease, exchange,  spin-off,  sale of
                  stock of or merger or consolidation of a subsidiary,  transfer
                  or otherwise, shall not constitute a Change of Control.

                  Notwithstanding  the foregoing,  (A) a Change of Control shall
         not be deemed to occur:

                      (I) pursuant to clause (i) or (ii) above,  solely  because
         15%  or  more  of  the  then  outstanding  Common  Stock  or  the  then
         outstanding voting securities of the Company is or becomes beneficially
         owned or is  directly  or  indirectly  held or  acquired by one or more
         employee benefit plans (or related trusts) maintained by the Group; or

                      (II)  pursuant to clause  (v)(y)  above,  (1) if the Board
         determines  that any sale,  lease,  exchange or other transfer does not
         involve  all or  substantially  all of the assets of the Company or the
         Group or (2) unless the Board determines  otherwise,  solely because of
         the consummation of a transaction or a series of transactions  pursuant
         to which the Group sells, distributes to the Company's stockholders, or
         otherwise  transfers or disposes of any or all of its  ownership of its
         natural,  acid-treated and flexible  graphite  business,  however owned

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         (including  ownership  through one or more dedicated  subsidiaries  and
         holding companies therefor and successors thereto); and

                  (B) to the  extent  that a  "person"  or  "group"  within  the
         meaning of Section 13(d) or 14(d)(2) of the Act is the beneficial owner
         of 15% or more of the  Common  Stock or the  voting  securities  of the
         Company on June 29, 2000,  then the references  therein to 15% shall be
         deemed to be  references  to 22.5% as (but only as) to such "person" or
         "group."

                  For purposes  hereof,  references  to  "beneficial  owner" and
         correlative phrases shall have the same definition as set forth in Rule
         13d-3 under the Act (except that ownership by underwriters for purposes
         of a  distribution  or offering  shall not be deemed to be  "beneficial
         ownership")  and  references  to  the  Act  or  rules  and  regulations
         thereunder shall mean those in effect on June 29, 2000."

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                                                                   Exhibit 10.28

                    AMENDMENT TO THE UCAR INTERNATIONAL INC.
                 MANAGEMENT STOCK OPTION PLAN (ORIGINAL VERSION)

     The  Management  Stock Option Plan  (Original  Version) is hereby  amended,
     effective as of June 29, 2000, as follows:

          The definition of "CHANGE OF CONTROL" is hereby amended to read in its
          entirety as follows:

          "  "CHANGE  OF  CONTROL"  shall  mean  the  occurrence  of  any of the
          following events:

               (i) any "person" or "group"  within the meaning of Section  13(d)
          or 14(d)(2) of the Securities Exchange Act of 1934 (the "Act") becomes
          the  beneficial  owner of 15% or more of the then  outstanding  Common
          Stock or 15% or more of the then outstanding  voting securities of the
          Company;

               (ii) any "person" or "group"  within the meaning of Section 13(d)
          or 14(d)(2) of the Act  acquires  by proxy or  otherwise  the right to
          vote on any matter or question with respect to 15% or more of the then
          outstanding  Common Stock or 15% or more of the combined  voting power
          of the then outstanding voting securities of the Company;

               (iii) Present Directors and New Directors cease for any reason to
          constitute  a majority of the Board (and,  for purposes of this clause
          (iii), "Present Directors" shall mean individuals who at the beginning
          of any consecutive  twenty-four month period were members of the Board
          and "New Directors" shall mean individuals whose election by the Board
          or  whose  nomination  for  election  as  directors  by the  Company's
          stockholders  was  approved  by a vote of at least  two-thirds  of the
          directors then in office who were Present Directors or New Directors);

               (iv) the  stockholders  of the Company approve a plan of complete
          liquidation or dissolution of the Company; or

               (v) consummation of:

                        (x)  a  reorganization, restructuring, recapitalization,
          reincorporation,  merger or  consolidation of the Company (a "Business
          Combination") unless, following such Business Combination,  (a) all or
          substantially  all  of the  individuals  and  entities  who  were  the
          beneficial owners of the Common Stock and the voting securities of the
          Company  outstanding  immediately  prior to such Business  Combination
          beneficially own, directly or indirectly,  more than 50% of the common
          equity  securities  and  the  combined  voting  power  of  the  voting
          securities  of the  corporation  or other entity  resulting  from such
          Business  Combination  outstanding  after  such  Business  Combination
          (including, without limitation, a corporation or other entity which as

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          a result  of such  Business  Combination  owns the  Company  or all or
          substantially  all of the assets of the Company or the Group (and, for
          purposes   hereof,   the  "Group"   refers  to  the  Company  and  its
          Subsidiaries,  collectively)  either  directly  or through one or more
          subsidiaries) in substantially the same proportions as their ownership
          immediately prior to such Business  Combination of outstanding  Common
          Stock  and  the  combined  voting  power  of  the  outstanding  voting
          securities  of the Company,  respectively,  (b) no "person" or "group"
          within the meaning of Section 13(d) or 14(d)(2) of the Act  (excluding
          (1) any  corporation  or other  entity  resulting  from such  Business
          Combination  and (2) any employee  benefit plan (or related  trust) of
          the  Group or any  corporation  or other  entity  resulting  from such
          Business  Combination)  beneficially  owns  15% or more of the  common
          equity  securities or 15% or more of the combined  voting power of the
          voting  securities of the  corporation or other entity  resulting from
          such Business Combination outstanding after such Business Combination,
          except to the extent that such beneficial  ownership  existed prior to
          such  Business  Combination  with  respect to the Common Stock and the
          voting  securities of the Company,  and (c) at least a majority of the
          members of the board of directors (or similar  governing  body) of the
          corporation or other entity  resulting from such Business  Combination
          were members of the Board at the time of the  execution of the initial
          agreement  providing for such Business  Combination  or at the time of
          the action of the Board approving such Business Combination, whichever
          is earlier; or

                        (y) any sale, lease, exchange or other transfer (in  one
          transaction   or  a  series  of  related   transactions)   of  all  or
          substantially  all of the assets of the Company or the Group,  whether
          held  directly  or  indirectly   through  one  or  more   subsidiaries
          (excluding  any  pledge,   mortgage,   grant  of  security   interest,
          sale-leaseback or similar  transaction,  but including any foreclosure
          sale),  provided,  that,  for  purposes of clauses (v) (x) and (v) (y)
          above, the divestiture of less than substantially all of the assets of
          the  Company  or the Group in one  transaction  or a series of related
          transactions,  whether effected by sale,  lease,  exchange,  spin-off,
          sale of stock of or merger or consolidation of a subsidiary,  transfer
          or otherwise, shall not constitute a Change of Control.

          Notwithstanding  the  foregoing,  (A) a Change of Control shall not be
     deemed to occur:

          (I) pursuant to clause (i) or (ii) above,  solely  because 15% or more
     of the  then  outstanding  Common  Stock  or the  then  outstanding  voting
     securities of the Company is or becomes  beneficially  owned or is directly
     or indirectly  held or acquired by one or more  employee  benefit plans (or
     related trusts) maintained by the Group; or

          (II) pursuant to clause (v)(y) above, (1) if the Board determines that
     any  sale,  lease,  exchange  or other  transfer  does not  involve  all or
     substantially  all of the assets of the  Company or the Group or (2) unless
     the Board  determines  otherwise,  solely because of the  consummation of a
     transaction or a series of transactions  pursuant to which the Group sells,
     distributes  to the  Company's  stockholders,  or  otherwise  transfers  or
     disposes of any or all of its  ownership of its natural,  acid-treated  and
     flexible graphite business,  however owned (including ownership through one

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     or  more  dedicated   subsidiaries  and  holding  companies   therefor  and
     successors thereto); and

          (B) to the extent  that a "person"  or "group"  within the  meaning of
     Section 13(d) or 14(d)(2) of the Act is the beneficial owner of 15% or more
     of the Common  Stock or the voting  securities  of the  Company on June 29,
     2000,  then the references  therein to 15% shall be deemed to be references
     to 22.5% as (but only as) to such "person" or "group."

          For purposes hereof,  references to "beneficial owner" and correlative
     phrases shall have the same definition as set forth in Rule 13d-3 under the
     Act (except that ownership by  underwriters  for purposes of a distribution
     or  offering  shall  not  be  deemed  to  be  "beneficial  ownership")  and
     references to the Act or rules and regulations  thereunder shall mean those
     in effect on June 29, 2000."

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