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                                                                   Exhibit 10.15

                                 FIRST AMENDMENT
                                     TO THE
                              LEXMARK HOLDING, INC.
                      STOCK OPTION PLAN FOR SENIOR MANAGERS

     WHEREAS, Lexmark Holding, Inc. (the "Company") adopted the Stock Option
Plan for Senior Managers (the "Plan"), effective as of March 27, 1991;

     WHEREAS, at a meeting of the Board of Directors of the Company (the
"Board") held on September 13, 1995, the Board resolved to exercise the
authority reserved to the Board under Section 9 of the Plan to amend the Plan in
the manner set forth herein;

     NOW, THEREFORE, the Plan is hereby amended as set forth below, subject to
the closing thereof, effective upon the initial sale of the Common Stock to the
public pursuant to the initial public offering of the Class A Common Stock of
the Company pursuant to an effective Registration Statement of the Company on
Form S-1 filed with the Securities and Exchange Commission:

     1. Section 2.1(f) is amended by deleting the term "Board" appearing in the
parenthetical thereof and inserting the term "Committee" in lieu thereof.

     2. Section 2.1(h) is deleted in its entirety and a new Section 2.1(h) is
added in lieu thereof, reading as follows:

     "(h) 'Committee' means the Compensation and Pension Committee of the Board
     (or such other committee of the Board as the Board shall designate), which
     shall consist of two or more members, each of whom shall be "disinterested
     persons" within the meaning of Rule 16b-3, as promulgated under the
     Securities and Exchange Act of 1934, as amended, and serving at the
     pleasure of the Board."

     3. Section 2.1(n) is hereby amended by adding a new sentence at the end
thereof, reading as follows:

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     "Notwithstanding the foregoing, from and after the initial sale of Common
     Stock to the public pursuant to an initial Public Offering, the term 'Fair
     Market Value' shall mean, on any date of determination, the average of the
     highest and lowest sales prices of a share of Common Stock, as reported for
     such date on a national exchange, or the average of the highest and lowest
     bid and asked prices for a share of Common Stock on such date, as reported
     on a nationally recognized system of price quotation, provided that if
     there are no Common Stock transactions reported on such exchange or system
     on such date, Fair Market Value shall mean the closing price on the
     immediately preceding date on which Common Stock transactions were so
     reported."

     4. Section 3 is amended by adding a new sentence at the end thereof,
reading as follows:

     "Notwithstanding any other provision of the Plan, following the initial
     sale of Common Stock to the public pursuant to an initial Public Offering,
     no Employee shall be selected to participate in the Plan and no Participant
     shall be granted any new or additional award under the Plan."

     5. Section 4.1 is amended by adding a new sentence at the end thereof,
reading as follows:

     "Notwithstanding the foregoing, no Options may be awarded under the Plan at
     any time following the initial sale of Common Stock to the public pursuant
     to an initial Public Offering."

     6. Section 4 is amended by adding a new Section 4.3 at the end thereof,
reading as follows:

     "4.3 FOREIGN MATTERS. After a Public Offering, the Committee shall have the
     authority to take any action with respect to outstanding Options held by
     Participants who are, or with respect to which the exercise thereof would
     be, subject to the laws of any foreign jurisdiction, including the
     modification of the terms of any such Option, as appropriate to permit the
     exercise of such Options to comply with the laws of such jurisdiction
     and/or to permit the holder thereof to receive the benefit of any favorable
     tax treatment ordinarily associated with options or similar awards granted
     to individuals subject to the laws of such jurisdiction."

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     7. Section 5.1 is amended by deleting the reference to "235,000" and
inserting a reference to "3,210,030, after giving effect to the stock split of
the Common Stock effected immediately prior to the initial Public Offering" in
lieu thereof.

     8. Section 5.2 is amended by adding a new sentence at the end thereof,
reading as follows:

     "Notwithstanding the foregoing, no Option will be available for grant
     pursuant to this Section 5.2 from or after the initial sale of Common Stock
     to the public pursuant to an initial Public Offering."

     9. Section 5.3 is amended by deleting the term "Board" each time it appears
herein and inserting the term "Committee" in lieu thereof.

     10. Section 6.1 is amended by adding the phrase "Subject to Section 4.1,"
at the beginning thereof.

     11. Section 6.6 of the Plan is amended by adding the following new sentence
at the end thereof, reading as follows:

     "Notwithstanding the foregoing, no such offers or sales may be made at any
     time from or after the initial sale of Common Stock to the public pursuant
     to an initial Public Offering."<PAGE>
                                                                   Exhibit 10.16

                                SECOND AMENDMENT
                                     TO THE
                              LEXMARK HOLDING, INC.
                      STOCK OPTION PLAN FOR SENIOR MANAGERS
                         (As amended September 13, 1995)

         This is the Second Amendment to the Lexmark Holding, Inc. Stock Option
Plan for Senior Managers (as amended September 13, 1995) (the "Plan;"
capitalized terms used herein and not defined have the meaning ascribed to such
terms in the Plan).

         WHEREAS, pursuant to Section 5.3 of the Plan, the Committee, in its
sole discretion, is authorized to adjust the number and class of Options, and
the number of shares of Common Stock available for issuance upon exercise of
such Options, granted under the Plan if it shall deem such an adjustment to be
necessary or appropriate to reflect, among other things, a stock dividend or
stock split of the Common Stock;

         WHEREAS, the Board has approved a two-for-one stock split of the Common
Stock to be effected in the form of a 100% stock dividend on June 10, 1999; and

         WHEREAS, Section 5.1 of the Plan currently provides that the maximum
number of Options and the maximum number of shares of Common Stock subject to
Options granted under the Plan may not exceed 3,210,030.

         NOW, THEREFORE, the Plan is hereby amended, effective as of June 10,
1999, as follows:

         1. Section 5.1 of the Plan is amended in its entirety to read as
follows:

              "5.1 NUMBER. Subject to the provisions of Sections 5.2 and 5.3,
the maximum number of Options (and the maximum number of shares of Common Stock
subject to Options) granted under the Plan may not exceed 6,420,060 (after
giving effect to the stock split of the Common Stock immediately prior to the
initial public offering and the stock split of the Common Stock effective June
10, 1999). The shares of Common Stock to be delivered upon the exercise of
Options granted under the Plan may consist, in whole or in part, of treasury
Common Stock or authorized but unissued Common Stock, not reserved for any other
purpose."

         In all other aspects, the Plan is hereby ratified and confirmed.<PAGE>
                                                                   Exhibit 10.17

                                 THIRD AMENDMENT
                                     TO THE
                              LEXMARK HOLDING, INC.
                      STOCK OPTION PLAN FOR SENIOR MANAGERS
                (As amended September 13, 1995 and June 10, 1999)

         This is the Third Amendment to the Lexmark Holding, Inc. Stock Option
Plan for Senior Managers (as amended September 13, 1995 and June 10,1999) (the
"Plan;" capitalized terms used herein and not defined have the meanings ascribed
to such terms in the Plan).

         WHEREAS, pursuant to Section 9 of the Plan, the Board is authorized to
amend the Plan from time to time;

         WHEREAS, the Board has determined to permit certain transfers by
Participants of Options granted to such Participant pursuant to the Plan for
estate planning purposes, subject to certain approvals; and

         WHEREAS, the Board and the Committee have determined that this
amendment to the Plan does not require the approval of stockholders of the
Company.

         NOW, THEREFORE, the Plan is hereby amended, effective as of July 29,
1999 as follows:

         1. Section 10.1 of the Plan is amended in its entirety to read as
follows:

         "10.1 NONTRANSFERABILITY OF AWARDS. Unless the Board, the Committee or
the Company's Vice President, Human Resources and Vice President and General
Counsel shall permit an Option to be transferred by a Participant to a
Participant's family member for estate planning purposes or to a trust,
partnership, corporation or other entity established by the Participant for
estate planning purposes, on such terms and conditions as the Board, the
Committee or such officers may specify, no Option granted under the Plan may be
sold, transferred, pledged, assigned, or otherwise alienated or hypothecated,
other than by will or by the laws of descent and distribution. All rights with
respect to any Option granted to a Participant under the Plan shall be
exercisable by the transferee only for as long as they could have been
exercisable by such Participant. If any Option is transferred to a family
member, trust partnership, corporation or other entity as contemplated by the
first sentence hereof, all references herein and in the applicable Option
Agreement to the Participant shall be deemed to refer to such permitted
transferee, other than any such references with respect to the personal status
of the Participant."

         In all other respects, the Plan is hereby ratified and confirmed.

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