Document:

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                                                                 Exhibit 10.36.1

                             AMENDMENT NO. 1 TO THE
                          WANGER ASSET MANAGEMENT, LTD.
               PROFIT-SHARING AND SAVINGS PLAN AND TRUST AGREEMENT
               (as Amended and Restated Effective January 1, 1997)

The Wanger Asset Management, Ltd. Profit-Sharing and Savings Plan and Trust
Agreement (the "Plan") is hereby amended effective January 1, 1997, as follows:

1.    Section 1.13 is amended to read as follows:

            Section 1.13 "Leased Employee" means any person who is not an
      Employee of an Employer, but who has provided services to an Employer
      under the primary direction of the Employer on a substantially full-time
      basis for a period of at least one year pursuant to an agreement between
      the Employer and a leasing organization. The period during which a Leased
      Employee performs services for an Employer shall be taken into account for
      purposes of Article III and Article VII of the Plan, unless (i) such
      Leased Employee is a participant in a money purchase pension plan
      maintained by the leasing organization which provides a non-integrated
      employer contribution rate of at least 10 percent of compensation,
      immediate participation for all employees and full and immediate vesting,
      and (ii) Leased Employees do not constitute more than 20 percent of the
      Employer's nonhighly compensated workforce. If a person is a Leased
      Employee of a Related Entity (determined by substituting "Related Entity"
      for "Employer" each time it appears in the first sentence of this
      Section), and then becomes an Employee of an Employer, the second sentence
      of this Section shall apply to that person's service as a Leased Employee
      with the Related Entity as if it had been service with an Employer as a
      Leased Employee.

2.    Section 2.5 is amended to read as follows:

      Section 2.5. Service with Harris Associates, L.P.; Service with Related
                   Entities.

      (a)   For employees who commenced employment with the Company on or before
            June 30, 1992, Hours of Service with Harris Associates, L.P. and any
            predecessor company shall be credited for all purposes under this
            Plan in accordance with the terms of this Article in the same manner
            as Hours of Service with the Company.

      (b)   If an employee of a Related Entity becomes an Employee of an
            Employer, Hours of Service with that Related Entity (for periods
            when it was a Related Entity) shall be credited for all purposes
            under this Plan, in accordance with the terms of this Article, in
            the same manner as Hours of Service with an Employer. When a Related
            Entity becomes an Employer, all employees of that Related Entity
            shall be credited with Hours of Service with that Related Entity
            (for periods when it was a Related Entity) for all purposes under
            this Plan, in accordance with the terms of this Article, in the same
            manner as Hours of Service with an Employer.

3.    Section 16.2(a) is amended by substituting "three Vesting Years of
      Service" for "five Vesting Years of Service."

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4.    Section 17.3 is amended to read as follows:

            Section 17.3. Vesting upon Termination of Plan or Complete
      Discontinuance of Contributions. Upon the termination of the Plan or the
      complete discontinuance of contributions by the Employers, each
      Participant shall have a nonforfeitable right in 100% of his Company
      Contribution Account and, if applicable, his Forfeiture Suspense Account.
      Upon a partial termination of the Plan, each affected Participant shall
      have a nonforfeitable right in 100% of his Company Contribution Account
      and, if applicable, his Forfeiture Suspense Account.

5.    Section 19.3 is amended to read as follows:

            Section 19.3 Minimum Contribution. For any Plan Year that the Plan
      shall be a Top-Heavy Plan, each Participant who: (a) is neither a Key
      Employee nor a Former Key Employee and (b) is an Employee on the last day
      of the Plan Year, regardless of how many Hours of Service he earned during
      the Plan Year, shall have allocated to his Company Contribution Account
      the sum of Company Contributions and Forfeitures in an amount equal to not
      less than the lesser of 3 percent of such Participant's compensation (as
      defined in Section 1.415-2(d) of the Treasury Regulations), or an amount
      which is the same ratio or percentage of Company Contributions and
      Forfeitures to compensation for the Plan Year as for the Key Employee who
      has the highest such ratio or percentage for the Plan Year. The amount of
      Company Contributions and Forfeitures required to be allocated under this
      Section 19.3 for any Plan Year shall be reduced by the amount of employer
      contributions and forfeitures allocated on behalf of the Participant under
      any other defined contribution plan maintained by an Employer or Related
      Entity for the Plan Year.

      IN WITNESS WHEREOF, the Company has caused this Agreement to be executed
and attested and said Trustees have hereunto set their hands, all on the
_________ day of __________, 1999.

                                          WANGER ASSET MANAGEMENT, LTD.

                                          By:
                                              ------------------------------

                                          Its:
                                               -----------------------------
ATTEST:

----------------------------------        -----------------------------------
                                                     Bruce H. Lauer

                                          -----------------------------------
                                                 Harold D. Lichtenstein

                                          -----------------------------------
                                                   Charles P. McQuaid<PAGE>

                                                                 Exhibit 10.36.2

                             AMENDMENT NO. 2 TO THE
                          WANGER ASSET MANAGEMENT, LTD.
               PROFIT-SHARING AND SAVINGS PLAN AND TRUST AGREEMENT
               (as Amended and Restated Effective January 1, 1997)

The Wanger Asset Management, Ltd. Profit-Sharing and Savings Plan and Trust
Agreement (the "Plan") is hereby amended effective August ___, 2000, as follows:

1.    Section 1.26 is amended to add the following between "Rollover
Contribution" and "Top-Heavy Plan":

      Definition                                      Appears in Section
      ----------                                      ------------------

      "Special Transition Participants"                      4.3(b)

2.    Section 4.3 is amended so that the entire text of the prior Section 4.3
shall become Section 4.3(a) and to add the following paragraph as new Section
4.3(b):

            "Notwithstanding the other provisions of this Section 4.3, each
      Participant who is not a Highly Compensated Employee for the 2000 Plan
      Year, who enters into a written employment agreement ("Employment
      Agreement") on or after June 7, 2000, who experiences a Termination of
      Employment "for good reason or by the Company without cause" (as
      determined under that Employment Agreement) as of September 29, 2000, and
      who fulfills all conditions of such Employment Agreement shall be
      considered a "Special Transition Participant." Special Transition
      Participants shall be entitled to share in a special Employer contribution
      for the 2000 Plan Year, which shall be made and allocated as of September
      29, 2000. The special Employer contribution described in the preceding
      sentence shall be allocated among the Special Transition Participants in
      proportion to their Compensation through September 29, 2000, in the same
      manner as Employer contributions are allocated under Section 4.4. Special
      Transition Participants shall not be entitled to share in the allocation
      of the Employer contribution and Forfeitures for the 2000 Plan Year under
      Section 4.4. Notwithstanding the other provisions of this Section 4.3, no
      amount will be allocated under this paragraph (b) to the extent it would
      cause the Plan to violate any nondiscrimination or other qualification
      rule under the Code.

3.    Section 7.3 (ii) is amended to add the following Subsection (D) to the end
thereof:

            (D) by reason of being a Special Transition Participant pursuant to
      Section 4.3.

<PAGE>

      IN WITNESS WHEREOF, the Company has caused this Agreement to be executed
and attested and said Trustees have hereunto set their hands, all on the
_________ day of __________, 2000.

                                          WANGER ASSET MANAGEMENT, LTD.

                                          By:
                                              ------------------------------

                                          Its:
                                               -----------------------------
ATTEST:

----------------------------------        -----------------------------------
                                               Bruce H. Lauer, as Trustee

                                          -----------------------------------
                                           Harold D. Lichtenstein, as Trustee

                                          -----------------------------------
                                             Charles P. McQuaid, as Trustee<PAGE>

                                                                 Exhibit 10.36.3

                             AMENDMENT NO. 3 TO THE
                          WANGER ASSET MANAGEMENT, LTD.
               PROFIT-SHARING AND SAVINGS PLAN AND TRUST AGREEMENT
               (as Amended and Restated Effective January 1, 1997)

The Wanger Asset Management, Ltd. Profit-Sharing and Savings Plan and Trust
Agreement (the "Plan") is hereby amended effective September 29, 2000, as
follows:

1.    The Cover Page of the Plan is revised to delete the name of the Plan,
      "WANGER ASSET MANAGEMENT, LTD. PROFIT-SHARING AND SAVINGS PLAN AND TRUST
      AGREEMENT," and replace the name of the Plan as follows:

      "LIBERTY WANGER ASSET MANAGEMENT, L.P. PROFIT SHARING AND SAVINGS PLAN AND
TRUST"

2.    Section 1.3 is deleted in its entirety and replaced to read as follows:

      "Section 1.3. "Board" means the Board of Directors of Liberty Wanger Asset
Management, L.P."

3.    Section 1.5 is deleted in its entirety and replaced to read as follows:

      "Section 1.5. "Company" means Liberty Wanger Asset Management, L.P., a
Delaware limited partnership. In addition, solely for purposes of Article III
and Article VII, the term "Company" also means an organization which is a
predecessor of the Company, including Wanger Asset Management, Ltd. And Harris
Associates, L.P.

4.    Section 1.16 is deleted in its entirety and replaced to read as follows:

      "Section 1.16. `Plan' means the Liberty Wanger Asset Management, L.P.
Profit Sharing and Savings Plan and Trust (formerly known, prior to September
29, 2000, as the Wanger Asset Management Ltd. Profit-Sharing and Savings Plan),
as set out in this document and subsequently amended."

5.    Section 1.19 is deleted in its entirety and replaced to read as follows:

      "Section 1.19. "Prior Plan" means the Wanger Asset Management, Ltd.
Profit-Sharing and Savings Plan, as established effective March 24, 1992 and as
amended through September 29, 2000.

6.    The Company desires to memorialize that the Employer Identification Number
      ("EIN") of the Plan's sponsoring employer will change from 36-3821515 to
      36-3820584 and that all government filings, summary plan descriptions, and
      other documents created to comply with any reporting and disclosure rules
      under the Code, ERISA or other applicable federal or state laws shall
      contain the changed EIN, all effective as of September 29, 2000.

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      IN WITNESS WHEREOF, the Company has caused these resolutions and Amendment
#3 to be executed and attested and said Trustees have hereunto set their hands,
all on the 22nd day of September, 2000.

                                          WANGER ASSET MANAGEMENT, LTD.

                                          By:
                                              ------------------------------

                                          Its:
                                               -----------------------------
ATTEST:

----------------------------------        -----------------------------------
                                               Bruce H. Lauer, as Trustee

                                          -----------------------------------
                                           Harold D. Lichtenstein, as Trustee

                                          -----------------------------------
                                             Charles P. McQuaid, as Trustee

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