Document:

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                                                                    Exhibit 4.01

                  This Note is a Global Security within the meaning of the
Indenture hereinafter referred to and is registered in the name of the
Depository named below or a nominee of the Depository. This Note is not
exchangeable for Notes registered in the name of a Person other than the
Depository or its nominee except in the limited circumstances described herein
and in the Indenture, and no transfer of this Note (other than a transfer of
this Note as a whole by the Depository to a nominee of the Depository or by a
nominee of the Depository to the Depository or another nominee of the
Depository) may be registered except in the limited circumstances described
herein.

                  Unless this certificate is presented by an authorized
representative of The Depository Trust Company, a New York corporation (the
"Depository"), to the Company or its agent for registration of transfer,
exchange, or payment, and any certificate issued is registered in the name of
Cede & Co. or in such other name as is requested by an authorized representative
of the Depository (and any payment is made to Cede & Co. or to such other entity
as is requested by an authorized representative of the Depository), ANY
TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON
IS WRONGFUL inasmuch as the registered owner hereof, Cede & Co., has an interest
herein.

                                 CITIGROUP INC.
                      FLOATING RATE NOTES DUE MAY 18, 2010

REGISTERED                                                            REGISTERED

                                                              CUSIP: 172967 CX 7
                                                              ISIN: US172967CX72
                                                          Common Code: 021994529

No. R-                                                                        $

                  CITIGROUP INC., a Delaware corporation (the "Company", which
term includes any successor Person under the Indenture), for value received,
hereby promises to pay to Cede & Co., or registered assigns, the principal sum
of $___________ on May 18, 2010 and to pay interest thereon from and including
August 18, 2005 or from the most recent Interest Payment Date to which interest
has been paid or duly provided for, quarterly, on February 18, May 18, August 18
and November 18 of each year, commencing November 18, 2005, at the rate per
annum for each Interest Period of three-month LIBOR, determined as provided
herein, plus 0.15% until the principal hereof is paid or made available for
payment. The interest so payable, and punctually paid or duly provided for, on
any Interest Payment Date will, as provided in the Indenture, be paid to the
Person in whose name this Note is registered at the close of business on the
Record Date for such interest, which shall be the Business Day immediately
preceding such Interest Payment Date.

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                  Any such interest not so punctually paid or duly provided for
will forthwith cease to be payable to the holder on such Record Date and may
either be paid to the Person in whose name this Note is registered at the close
of business on a subsequent Record Date, such subsequent Record Date to be not
less than five days prior to the date of payment of such defaulted interest,
notice whereof shall be given to holders of Notes of this series not less than
15 days prior to such subsequent Record Date, or be paid at any time in any
other lawful manner not inconsistent with the requirements of any securities
exchange on which the Notes of this series may be listed, and upon such notice
as may be required by such exchange, all as more fully provided in the
Indenture.

                  Interest hereon will be calculated on the basis of the actual
number of days elapsed in an Interest Period and a 360-day year. Dollar amounts
resulting from such calculation will be rounded to the nearest cent, with
one-half cent being rounded upward. An "Interest Period" shall be the period
from and including an Interest Payment Date (or from August 18, 2005 in the case
of the first Interest Payment Date) to and including the day immediately
preceding the next Interest Payment Date.

                  If an Interest Payment Date falls on a day that is not a
Business Day, such Interest Payment Date will be the next succeeding Business
Day. If the Maturity of the Notes falls on a day that is not a Business Day, the
payment due on Maturity will be postponed to the next succeeding Business Day,
and no further interest will accrue in respect of such postponement. If a date
for payment of interest or principal on the Notes falls on a day that is not a
business day in the place of payment, such payment will be made on the next
succeeding business day in such place of payment as if made on the date the
payment was due. No interest will accrue on any amounts payable for the period
from and after the due date for payment of such principal or interest.

                  For these purposes, "Business Day" means any day which is a
day on which commercial banks settle payments and are open for general business
in The City of New York.

                  Payment of the principal of and interest on this Note will be
made at the office or agency of the Trustee maintained for that purpose in The
City of New York.

                  Reference is hereby made to the further provisions of this
Note set forth on the reverse hereof, which further provisions shall for all
purposes have the same effect as if set forth at this place.

                  Unless the certificate of authentication hereon has been
executed by the Trustee or by an authenticating agent on behalf of the Trustee
by manual signature, this Note shall not be entitled to any benefit under the
Indenture or be valid or obligatory for any purpose.

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                  IN WITNESS WHEREOF, the Company has caused this instrument to
be duly executed under its corporate seal.

Dated:  September 14, 2005

                                    CITIGROUP INC.

                                    By:_________________________________
                                    Title:  Treasurer

ATTEST:

By:___________________________
Title:  Assistant Secretary

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                  This is one of the Notes of the series issued under the
within-mentioned Indenture.

Dated: September 14, 2005

                                    THE BANK OF NEW YORK,
                                    as Trustee

                                    By:_________________________________
                                          Name:
                                          Title:

                                    -or-

                                    CITIBANK, N.A.,
                                    as Authenticating Agent

                                    By:_________________________________
                                          Name:
                                          Title:

                                       4

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         This Note is one of a duly authorized issue of Securities of the
Company (the "Notes"), issued and to be issued in one or more series under the
Indenture, dated as of March 15, 1987 (as amended and supplemented to date, the
"Indenture"), between the Company and The Bank of New York, as Trustee (the
"Trustee", which term includes any successor trustee under the Indenture), to
which Indenture and all indentures supplemental thereto reference is hereby made
for a statement of the respective rights, limitations of rights, duties and
immunities thereunder of the Company, the Trustee and the holders of the Notes
and of the terms upon which the Notes are, and are to be, authenticated and
delivered. This Note is one of the series designated on the face hereof,
previously issued in the aggregate principal amount of $1,000,000,000 and
increased to $1,600,000,000.

         This Note will bear interest for each Interest Period at a rate
determined by Citibank, N.A., acting as Calculation Agent. The interest rate on
this Note for a particular Interest Period will be a per annum rate equal to
LIBOR as determined on the related Interest Determination Date, plus 0.15%. The
Interest Determination Date for an Interest Period will be the second London
business day preceding such Interest Period. The Interest Determination Date for
the first Interest Period was August 16, 2005. Promptly upon determination, the
Calculation Agent will inform the Trustee and the Company of the interest rate
for the next Interest Period. Absent manifest error, the determination of the
interest rate by the Calculation Agent shall be binding and conclusive on the
holders of Notes, the Trustee and the Company.

         A London business day is a day on which dealings in deposits in U.S.
dollars are transacted in the London interbank market.

         On any Interest Determination Date, LIBOR will be equal to the offered
rate for deposits in U.S. dollars having an index maturity of three months for
the next Interest Period, in amounts of at least $1,000,000, as such rate
appears on Telerate Page 3750 at approximately 11:00 a.m., London time, on such
Interest Determination Date. If the Telerate Page 3750 is replaced by another
service or ceases to exist, the Calculation Agent will use the replacing service
or such other service that may be nominated by the British Bankers' Association
for the purpose of displaying London interbank offered rates for U.S. dollar
deposits.

         If no offered rate appears on Telerate Page 3750 on an Interest
Determination Date at approximately 11:00 a.m., London time, then the
Calculation Agent (after consultation with the Company) will select four major
banks in the London interbank market and shall request each of their principal
London offices to provide a quotation of the rate at which three-month deposits
in U.S. dollars in amounts of at least $1,000,000 are offered by it to prime
banks in the London interbank market, on that date and at that time, that is
representative of single transactions at that time. If at least two quotations
are provided, LIBOR will be the arithmetic average of the quotations provided.
Otherwise, the Calculation Agent will select three major banks in New York City
and shall request each of them to provide a quotation of the rate offered by
them at approximately 11:00 a.m., New York City time, on the Interest
Determination Date for loans in U.S. dollars to leading European banks having an
index maturity of three months for the applicable Interest Period in an amount
of at least $1,000,000 that is representative of single

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transactions at that time. If three quotations are provided, LIBOR will be the
arithmetic average of the quotations provided. Otherwise, the rate of LIBOR for
the next Interest Period will be set equal to the rate of LIBOR for the current
Interest Period.

         The Luxembourg Stock Exchange shall be notified of the interest rate,
the amount of the interest payment and the Interest Payment Date for a
particular Interest Period not later than the first day of such Interest Period.
Upon request from any Noteholder, the Calculation Agent will provide the
interest rate in effect on this Note for the current Interest Period and, if it
has been determined, the interest rate to be in effect for the next Interest
Period.

         If an event of default (as defined in the Indenture) with respect to
Notes of this series shall occur and be continuing, the principal of the Notes
of this series may be declared due and payable in the manner and with the effect
provided in the Indenture.

         The Indenture contains provisions for defeasance at any time of the
entire indebtedness of this Note upon compliance by the Company with certain
conditions set forth in Sections 11.03 and 11.04 thereof, which provisions apply
to this Note.

         The Indenture contains provisions permitting the Company and the
Trustee, without the consent of the holders of the Securities, to establish,
among other things, the form and terms of any series of Securities issuable
thereunder by one or more supplemental indentures, and, with the consent of the
holders of not less than 66 2/3% in aggregate principal amount of Securities at
the time outstanding which are affected thereby, to modify the Indenture or any
supplemental indenture or the rights of the holders of Securities of such series
to be affected, provided that no such modification will (i) extend the fixed
maturity of any Securities, reduce the rate or extend the time of payment of
interest thereon, reduce the principal amount thereof or the premium, if any,
thereon, reduce the amount of the principal of Original Issue Discount
Securities payable on any date, change the currency in which Securities are
payable, or impair the right to institute suit for the enforcement of any such
payment on or after the maturity thereof, without the consent of the holder of
each Security so affected, or (ii) reduce the aforesaid percentage of Securities
of any series the consent of the holders of which is required for any such
modification without the consent of the holders of all Securities of such series
then outstanding, or (iii) modify, without the written consent of the Trustee,
the rights, duties or immunities of the Trustee.

         No reference herein to the Indenture and no provision of this Note or
of the Indenture shall alter or impair the obligation of the Company, which is
absolute and unconditional, to pay the principal of and interest on this Note at
the times, place and rate, and in the coin or currency, herein prescribed.

         This Note is a Global Security registered in the name of a nominee of
the Depository. This Note is exchangeable for Notes registered in the name of a
person other than the Depository or its nominee only in the limited
circumstances hereinafter described. Unless and until it is exchanged in whole
or in part for definitive Notes in certificated form, this Note may not be
transferred except as a whole by the Depository to a nominee of the Depository
or by a nominee of the Depository to the Depository or another nominee of the
Depository.

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         The Notes represented by this Global Security are exchangeable for
definitive Notes in certificated form of like tenor as such Notes in
denominations of $1,000 and integral multiples thereof only if (i) the
Depository notifies the Company that it is unwilling or unable to continue as
Depository for the Notes or (ii) the Depository ceases to be a clearing agency
registered under the Securities Exchange Act of 1934, as amended, or (iii) the
Company in its sole discretion decides to allow the Notes to be exchanged for
definitive Notes in registered form. Any Notes that are exchangeable pursuant to
the preceding sentence are exchangeable for certificated Notes issuable in
authorized denominations and registered in such names as the Depository shall
direct. As provided in the Indenture and subject to certain limitations therein
set forth, the transfer of definitive Notes in certificated form is registrable
in the register maintained by the Company in The City of New York for such
purpose, upon surrender of the definitive Note for registration of transfer at
the office or agency of the registrar, duly endorsed by, or accompanied by a
written instrument of transfer in form satisfactory to the Company and the
registrar duly executed by, the holder thereof or his attorney duly authorized
in writing, and thereupon one or more new Notes of this series and of like
tenor, of authorized denominations and for the same aggregate principal amount,
will be issued to the designated transferee or transferees. Subject to the
foregoing, this Note is not exchangeable, except for a Global Security or Global
Securities of this issue of the same principal amount to be registered in the
name of the Depository or its nominee.

         No service charge shall be made for any such registration of transfer
or exchange, but the Company may require payment of a sum sufficient to cover
any tax or other governmental charge payable in connection therewith.

         Prior to due presentment of this Note for registration of transfer, the
Company, the Trustee and any agent of the Company or the Trustee may treat the
Person in whose name this Note is registered as the owner hereof for all
purposes, whether or not this Note be overdue, and neither the Company, the
Trustee nor any such agent shall be affected by notice to the contrary.

         The Company will pay additional amounts ("Additional Amounts") to the
beneficial owner of any Note that is a non-United States person in order to
ensure that every net payment on such Note will not be less, due to payment of
U.S. withholding tax, than the amount then due and payable. For this purpose, a
"net payment" on a Note means a payment by the Company or a paying agent,
including payment of principal and interest, after deduction for any present or
future tax, assessment or other governmental charge of the United States. These
Additional Amounts will constitute additional interest on the Note.

         The Company will not be required to pay Additional Amounts, however, in
any of the circumstances described in items (1) through (13) below.

         (1)      Additional Amounts will not be payable if a payment on a Note
                  is reduced as a result of any tax, assessment or other
                  governmental charge that is imposed or withheld solely by
                  reason of the beneficial owner:

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                  (a)      having a relationship with the United States as a
                           citizen, resident or otherwise;

                  (b)      having had such a relationship in the past or

                  (c)      being considered as having had such a relationship.

         (2)      Additional Amounts will not be payable if a payment on a Note
                  is reduced as a result of any tax, assessment or other
                  governmental charge that is imposed or withheld solely by
                  reason of the beneficial owner:

                  (a)      being treated as present in or engaged in a trade or
                           business in the United States;

                  (b)      being treated as having been present in or engaged in
                           a trade or business in the United States in the past
                           or

                  (c)      having or having had a permanent establishment in the
                           United States.

         (3)      Additional Amounts will not be payable if a payment on a Note
                  is reduced as a result of any tax, assessment or other
                  governmental charge that is imposed or withheld solely by
                  reason of the beneficial owner being or having been any of the
                  following (as such terms are defined in the Internal Revenue
                  Code of 1986, as amended):

                  (a)      personal holding company;

                  (b)      foreign personal holding company;

                  (c)      foreign private foundation or other foreign
                           tax-exempt organization;

                  (d)      passive foreign investment company;

                  (e)      controlled foreign corporation or

                  (f)      corporation which has accumulated earnings to avoid
                           United States federal income tax.

         (4)      Additional Amounts will not be payable if a payment on a Note
                  is reduced as a result of any tax, assessment or other
                  governmental charge that is imposed or withheld solely by
                  reason of the beneficial owner owning or having owned,
                  actually or constructively, 10 percent or more of the total
                  combined voting power of all classes of stock of the Company
                  entitled to vote or by reason of the beneficial owner being a
                  bank that has invested in a Note as an extension of credit in
                  the ordinary course of its trade or business.

For purposes of items (1) through (4) above, "beneficial owner" means a
fiduciary, settlor, beneficiary, member or shareholder of the holder if the
holder is an estate, trust, partnership, limited liability company, corporation
or other entity, or a person holding a power over an estate or trust
administered by a fiduciary holder.

         (5)      Additional Amounts will not be payable to any beneficial owner
                  of a Note that is a:

                  (a)      fiduciary;

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                  (b)      partnership;

                  (c)      limited liability company or

                  (d)      other fiscally transparent entity

                  or that is not the sole beneficial owner of the Note, or any
                  portion of the Note. However, this exception to the obligation
                  to pay Additional Amounts will only apply to the extent that a
                  beneficiary or settlor in relation to the fiduciary, or a
                  beneficial owner or member of the partnership, limited
                  liability company or other fiscally transparent entity, would
                  not have been entitled to the payment of an Additional Amount
                  had the beneficiary, settlor, beneficial owner or member
                  received directly its beneficial or distributive share of the
                  payment.

         (6)      Additional Amounts will not be payable if a payment on a Note
                  is reduced as a result of any tax, assessment or other
                  governmental charge that is imposed or withheld solely by
                  reason of the failure of the beneficial owner or any other
                  person to comply with applicable certification,
                  identification, documentation or other information reporting
                  requirements. This exception to the obligation to pay
                  Additional Amounts will only apply if compliance with such
                  reporting requirements is required by statute or regulation of
                  the United States or by an applicable income tax treaty to
                  which the United States is a party as a precondition to
                  exemption from such tax, assessment or other governmental
                  charge.

         (7)      Additional Amounts will not be payable if a payment on a Note
                  is reduced as a result of any tax, assessment or other
                  governmental charge that is collected or imposed by any method
                  other than by withholding from a payment on a Note by the
                  Company or a paying agent.

         (8)      Additional Amounts will not be payable if a payment on a Note
                  is reduced as a result of any tax, assessment or other
                  governmental charge that is imposed or withheld by reason of a
                  change in law, regulation, or administrative or judicial
                  interpretation that becomes effective more than 15 days after
                  the payment becomes due or is duly provided for, whichever
                  occurs later.

         (9)      Additional Amounts will not be payable if a payment on a Note
                  is reduced as a result of any tax, assessment or other
                  governmental charge that is imposed or withheld by reason of
                  the presentation by the beneficial owner of a Note for payment
                  more than 30 days after the date on which such payment becomes
                  due or is duly provided for, whichever occurs later.

         (10)     Additional Amounts will not be payable if a payment on a Note
                  is reduced as a result of any:

                  (a)      estate tax;

                  (b)      inheritance tax;

                  (c)      gift tax;

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                  (d)      sales tax;

                  (e)      excise tax;

                  (f)      transfer tax;

                  (g)      wealth tax;

                  (h)      personal property tax or

                  (i)      any similar tax, assessment, withholding, deduction
                           or other governmental charge.

         (11)     Additional Amounts will not be payable if a payment on a Note
                  is reduced as a result of any tax, assessment, or other
                  governmental charge required to be withheld by any paying
                  agent from a payment of principal or interest on a Note if
                  such payment can be made without such withholding by any other
                  paying agent.

         (12)     Additional amounts will not be payable if a payment on a Note
                  is reduced as a result of any tax, assessment or other
                  governmental charge that is required to be made pursuant to
                  any European Union directive on the taxation of savings income
                  or any law implementing or complying with, or introduced to
                  conform to, any such directive.

         (13)     Additional Amounts will not be payable if a payment on a Note
                  is reduced as a result of any combination of items (1) through
                  (12) above.

         Except as specifically provided herein, the Company will not be
required to make any payment of any tax, assessment or other governmental charge
imposed by any government or a political subdivision or taxing authority of such
government.

         As used in this Note, "United States person" means:

         (a)      any individual who is a citizen or resident of the United
                  States;

         (b)      any corporation, partnership or other entity created or
                  organized in or under the laws of the United States;

         (c)      any estate if the income of such estate falls within the
                  federal income tax jurisdiction of the United States
                  regardless of the source of such income and

         (d)      any trust if a United States court is able to exercise primary
                  supervision over its administration and one or more United
                  States persons have the authority to control all of the
                  substantial decisions of the trust.

         Additionally, "non-United States person" means a person who is not a
United States person, and "United States" means the states of the United States
of America and the District of Columbia, but excluding its territories and its
possessions.

         Except as provided below, the Notes may not be redeemed prior to
maturity.

         (1)      The Company may, at its option, redeem the Notes if:

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                  (a)      the Company becomes or will become obligated to pay
                           Additional Amounts as described above;

                  (b)      the obligation to pay Additional Amounts arises as a
                           result of any change in the laws, regulations or
                           rulings of the United States, or an official position
                           regarding the application or interpretation of such
                           laws, regulations or rulings, which change is
                           announced or becomes effective on or after May 11,
                           2005 and

                  (c)      the Company determines, in its business judgment,
                           that the obligation to pay such Additional Amounts
                           cannot be avoided by the use of reasonable measures
                           available to it, other than substituting the obligor
                           under the Notes or taking any action that would
                           entail a material cost to the Company.

         (2)      The Company may also redeem the Notes, at its option, if:

                  (a)      any act is taken by a taxing authority of the United
                           States on or after May 11, 2005, whether or not such
                           act is taken in relation to the Company or any
                           affiliate, that results in a substantial probability
                           that the Company will or may be required to pay
                           Additional Amounts as described above;

                  (b)      the Company determines, in its business judgment,
                           that the obligation to pay such Additional Amounts
                           cannot be avoided by the use of reasonable measures
                           available to it, other than substituting the obligor
                           under the Notes or taking any action that would
                           entail a material cost to the Company and

                  (c)      the Company receives an opinion of independent
                           counsel to the effect that an act taken by a taxing
                           authority of the United States results in a
                           substantial probability that the Company will or may
                           be required to pay the Additional Amounts described
                           above, and delivers to the Trustee a certificate,
                           signed by a duly authorized officer, stating that
                           based on such opinion the Company is entitled to
                           redeem the Notes pursuant to their terms.

Any redemption of the Notes as set forth in clauses (1) or (2) above shall be in
whole, and not in part, and will be made at a redemption price equal to 100% of
the principal amount of the Notes Outstanding plus accrued interest thereon to
the date of redemption. Holders shall be given not less than 30 days nor more
than 60 days prior notice by the Trustee of the date fixed for such redemption.

         All terms used in this Note which are defined in the Indenture shall
have the meanings assigned to them in the Indenture. The Notes are governed by
the laws of the State of New York.

                                       11<PAGE>
                                                                     Exhibit 4.4

                             EQUITYHOLDERS AGREEMENT

     THIS EQUITYHOLDERS AGREEMENT (this "AGREEMENT") is made as of February 10,
2005 among Emergency Medical Services L.P., a Delaware limited partnership (the
"COMPANY"), Onex Partners LP, a Delaware limited partnership ("ONEX PARTNERS"),
the equityholders listed on the signature pages of this Agreement and such other
equityholders of the Company as may, from time to time, become parties to this
Agreement in accordance with the provisions hereof.

     The Company, the Onex Investors (as defined below) and the Equityholders
(as defined below) desire to enter into this Agreement for the purpose of
regulating certain aspects of the equityholders' relationships with one another
and with the Company and in order to provide for the stability of the Company.

     As used in this Agreement, the term "EMPLOYEE INVESTOR" means any
affiliated physician or any individual employed by the Company or any subsidiary
of the Company at the time he or she becomes a party to this Agreement and is
identified as an "Employee Investor" on the signature pages of this Agreement,
and any permitted transferee who becomes party to this Agreement as contemplated
by Section 1.3(a). Certain other capitalized terms used in this Agreement have
the meanings set forth in Article 5.

     The parties, intending to be legally bound hereby, agree as follows:

                                   ARTICLE 1

                       Restrictions on Transfer of Units

     1.1 Transfer of Equityholder Units. No Employee Investor shall sell,
transfer, assign, pledge, exchange or otherwise dispose of (a "TRANSFER") any
interest in Units except pursuant to the provisions of this Article 1, Article 2
or pursuant to a Public Sale.

     1.2 Permitted Transfers.

     The restrictions contained in this Article 1 shall not apply with respect
to any Transfer of Units by any Employee Investor to any other Employee Investor
or to another Equityholder who is party to the Investor Equityholders Agreement;
provided, that the restrictions contained in this Article 1 or, if applicable,
the restrictions contained in the Investor Equityholders Agreement shall
continue to be applicable to the Units after any such Transfer; and, provided
further, that the transferee of such Units has agreed in writing that such Units
remain subject such restrictions.

     1.3 First Offer Right.

     (a) At any time after the fifth anniversary of the date of this Agreement,
any Employee Investor (the "TRANSFERRING EQUITYHOLDER") may Transfer Units
pursuant to a bona fide offer from a Person by complying with this Section 1.3.
In order to do so, the Transferring Equityholder must deliver a notice (the
"OFFER NOTICE") to the Company, disclosing the proposed number of Units (the
"SUBJECT UNITS") to be transferred, the identity of the proposed purchasers,
and, in reasonable detail, the proposed terms and conditions of the Transfer,
which must include payment of the purchase price in cash at the closing of the
Transfer. Then, the Company may elect to purchase the Subject Units in cash and
on the other terms specified therein by delivering notice of such election to
the Transferring Equityholder within 60 days after the delivery of the Offer
Notice. If the Company has elected to purchase all (but not less than all) of
the
<PAGE>
Subject Units from the Transferring Equityholder, the transfer of such Units
pursuant to such election will be consummated at a time and place specified by
the Company within 90 days after delivery of the Offer Notice. If (and only if)
the Company has not elected to purchase all of the Subject Units within 60 days
after delivery of the Offer Notice, the Transferring Equityholder may, not less
than 90 days or more than 120 days after delivery of the Offer Notice, transfer
all (but not less than all) of the Subject Units to the proposed purchasers set
forth in the Offer Notice at the same price per Unit in cash and on the same
other terms offered to the Company in the Offer Notice; provided, that prior to
such Transfer, such transferees shall have agreed in writing to be bound by the
provisions of this Agreement as if the transferee(s) were Employee Investors. If
the Subject Units are not so transferred within such period, they will be
subject to the provisions of this Section 1.3(a) with respect to subsequent
transfer and the Transferring Equityholder will not be entitled to deliver
another Offer Notice for 90 days after the Subject Units again become subject to
this Section 1.3(a).

     (b) If the Board determines in good faith that the acquisition of Units by
a proposed purchaser identified in an Offer Notice could have an adverse effect
on the Company for competitive or regulatory reasons, the Company shall deliver
notice of that determination to the Transferring Equityholder within 20 days
after delivery of the Offer Notice and such Offer Notice shall be void and of no
effect. The Transferring Equityholder shall provide the Board with such
information as the Board may reasonably request in order to make that
determination and the 20-day period referred to in the preceding sentence shall
be tolled during any period in which such information has been requested and not
supplied.

     (c) The Company may transfer any of its respective rights to purchase the
Subject Units under Section 1.3(a) to any Person.

     1.4 Lock-Up. No Employee Investor shall effect any transfer of his Pre-QPO
Units for the 180-day period beginning on the date of a Qualified Public
Offering.

     As used herein, the term "PRE-QPO UNITS", as to any Person, means the Units
held by that Person immediately prior to the consummation of a Qualified Public
Offering, and including any Units issued upon the exercise of any warrant or
option held by that Person immediately prior to the consummation of a Qualified
Public Offering.

     1.5 Transfers Following a Qualified Public Offering.

     (a) Following a Qualified Public Offering and the 180-day lock-up period
described in Section 1.4 above, each Employee Investor who is not a Restricted
Employee Investor (as defined in 1.5(b)(i) below), may transfer his or her
Pre-QPO Units free of the restrictions of this Article I.

     (b) (i) A "RESTRICTED EMPLOYEE INVESTOR" means any Employee Investor who
has, prior to a Qualified Public Offering, been granted options under a Company
plan to purchase Units with an aggregate exercise price of $180,000 or more.

          (ii) Following a Qualified Public Offering and the 180-day lock-up
     period described in Section 1.4 above, and notwithstanding the provisions
     of Section 1.3(a), a Restricted Employee Investor may sell Pre-QPO Units
     only pursuant to Public Sale, and limited to a percentage of the Restricted
     Employee's Pre-QPO Units equal, at the date of any Public Sale, to:

               (w) the greater of

               (A) 50% of the Restricted Employee Investor's Pre-QPO Units, such
Public Sale rights accruing in cumulative installments of 12.5% of the
Restricted Employee Investor's Pre-

                                        2
<PAGE>
QPO Units in each 12-month per commencing with (and including any Pre-QPO Units
sold in) the Qualified Public Offering, and

               (B) the percentage of Onex Partner's Pre-QPO Units sold by Onex
Partners, plus

               (x) a number of Pre-QPO Units having an aggregate sale price
equal to the ordinary income tax payable by the Restricted Employee Investor as
a result of such Restricted Employee Investor's purchase of Pre-QPO Units, plus

               (y) upon the exercise of an option granted under a Company plan
for employees, a number of Pre-QPO Units having an aggregate sale price equal to
the income taxes payable by the Restricted Employee Investor as a result of such
exercise, provided, that the Public Sale occurs within five Business Days of the
exercise, minus

               (z) the Pre-QPO Units previously sold by the Restricted Employee
Investor, whether pursuant to this Section 1.5 or otherwise.

     1.6 Termination. The provisions of this Article 1 shall terminate
automatically upon the earlier to occur of (a) an Approved Sale and (b) the
181st day following a Qualified Public Offering; provided however, that in the
case of a Restricted Employee Investor the provisions of this Article 1 shall
terminate automatically upon the earlier to occur of (a) an Approved Sale and
(b) the fifth anniversary of a Qualified Public Offering.

                                    ARTICLE 2

                    Tag-Along, Drag-Along and Put/Call Rights

     2.1 Tag-Along Right.

     (a) If any intended Transfer of Units by an Onex Investor (the "INITIATING
EQUITYHOLDER") will be the subject of a "tag-along" right of the Management
Investors pursuant to Section 5.1 of the Investor Equityholders Agreement, the
Initiating Equityholder shall, at least 10 days prior to the Transfer, give
notice (a "SALE NOTICE") to each Employee Investor describing the terms of the
Transfer in reasonable detail, including the number of Units to be transferred,
the price per Unit to be paid for such Units, and the other terms and conditions
of the Transfer. If 50% or more of the Management Investors elect to participate
in such Transfer, then each Employee Investor will be entitled and obligated to
sell in the contemplated Transfer, at the price per Unit and on the same terms,
a number of Units equal to such Employee Investor's Tag-Along Percentage. The
Initiating Equityholder may abandon the contemplated Transfer at any time prior
to its closing without any liability or obligation under this Section 2.1. An
Employee Investor's "TAG-ALONG PERCENTAGE" is equal to the "Tag-Along
Percentage" of the Management Investors who are participating in the Transfer.

     For the avoidance of doubt, if there are four Management Investors and two
of them elect to participate in the Transfer, and if the Management Investors'
"Tag-Along Percentage" (that is, the percentage of their total Units that will
be Transferred) is 25%, then each Employee Investor will be entitled, and will
be obligated, to Transfer 25% of his Units in the contemplated Transfer.

     (b) The Initiating Equityholder may effect the participation of the
Employee Investors in the contemplated Transfer by either (i) obtaining the
agreement of the prospective transferee(s) to purchase the Units or (ii)
purchasing the Units from the Employee Investors directly, at the same price per
Unit and on

                                        3
<PAGE>
the same terms and conditions, in either case simultaneously with and
conditioned upon the closing of the proposed Transfer.

     (c) The Employee Investors will use their best efforts to cooperate in the
proposed Transfer and will take all necessary and desirable actions in
connection with the consummation of the proposed Transfer as are reasonably
requested by the Initiating Equityholder, including, but not limited to, entry
into agreements and provision of representations, warranties and
indemnification; provided, that no Employee Investor shall be required to enter
into substantively different agreements or provide substantively different
representations and warranties or indemnification than the Initiating
Equityholder and each Employee Investor's obligations thereunder shall be
several and limited to the proceeds received by him in connection with such
proposed Transfer.

     (d) The provisions of this Section 2.1 shall not apply to any Public Sale
or Public Offering, to any Transfer in connection with a Sale of the Company or
to any Transfer to an Onex Investor or an Affiliate of an Onex Investor;
provided, that any Affiliate of an Onex Investor to which Units are transferred
must have agreed in writing to become a party to this Agreement as an Onex
Investor.

     2.2 Drag-Along Right.

     (a) Subject to Section 2.2(b), if the Majority Onex Investors approve a
Sale of the Company (the "APPROVED SALE"), the Employee Investors will consent
to and raise no objections to the Approved Sale and (i) if the Approved Sale is
structured as a sale of Units, the Employee Investors will sell all of their
Units and rights to acquire Units on the terms and conditions approved by the
Majority Onex Investors, (ii) if the Approved Sale is structured as a merger,
consolidation or other reorganization, the Employee Investors will vote in favor
thereof and will not exercise any dissenters' rights of appraisal they may have
under Delaware law, and (iii) if the Approved Sale is structured as a sale of
all or substantially all of the Company's consolidated assets, the Employee
Investors will vote in favor thereof. The Employee Investors will use their best
efforts to cooperate in the Approved Sale and will take all necessary and
desirable actions in connection with the consummation of the Approved Sale as
are reasonably requested by the Majority Onex Investors, including, but not
limited to, entry into agreements and provision of representations, warranties
and indemnification, provided, that no Employee Investor shall be required to
enter into substantively different agreements or provide substantively different
representations and warranties or indemnification than any other Equityholder
and each Equityholder's obligations thereunder shall be several and limited to
the proceeds received by such Equityholder in connection with such Approved
Sale.

     (b) The obligations of the Employee Investors with respect to the Approved
Sale are subject to the satisfaction of the condition that, upon the
consummation of the Approved Sale, all of the Employee Investors will receive
the same form and per Unit amount of consideration for their Units as all other
Equityholders, or if any Equityholders are given an option as to the form and
amount of consideration to be received, all Employee Investors must be given the
same option, provided, that the Approved Sale may provide for payment in
securities to all Equityholders that are accredited investors within the meaning
of Regulation D under the Securities Act and in cash to Equityholders that are
not accredited investors or may provide Equityholders that are accredited
investors with the option to receive securities or cash while Equityholders that
are not accredited investors receive cash.

     (c) If the proposed Approved Sale involves the receipt by Employee
Investors of securities for which Section 4(2) of the Securities Act of 1933 or
Rule 506 (or any similar rule then in effect) promulgated by the Securities and
Exchange Commission may be available with respect to such negotiation or
transaction (including a merger, consolidation or other reorganization), the
Employee Investors will, at the request of the Majority Onex Investors, and to
the extent required to comply with Regulation D, appoint a

                                        4
<PAGE>
purchaser representative (as such term is defined in Rule 501) reasonably
acceptable to the Majority Onex Investor. If any Employee Investor appoints the
purchaser representative designated by the Majority Onex Investors, the Company
will pay the fees of such purchaser representative, but if any Employee Investor
declines to appoint the purchaser representative designated by the Majority Onex
Investors, such holder will appoint another purchaser representative (reasonably
acceptable to the Majority Onex Investors), and such holder will be responsible
for the fees of the purchaser representative so appointed.

     (d) No Employee Investor shall have any right to participate in any
investment in "Successor Securities", as that term is defined in Section 5.2(d)
of the Investor Equityholders Agreement.

     2.3 Put/Call Rights on Certain Events.

     (a) If, prior to a Qualified Public Offering, an Employee Investor dies or
suffers a permanent disability, or is terminated by the Company or a subsidiary
of the Company without Cause (the "PUT/CALL EVENT"), then such Employee Investor
(or, in the case of death or permanent disability, such Employee Investor's
executor, personal representative or legal representative) shall have the right
to require the Company to purchase (the "PUT OPTION"), by delivery of a written
notice (the "PUT NOTICE") to the Company within 30 days after the date of the
Put/Call Event (the "PUT PERIOD"), and the Company shall be required to
purchase, all of the Put/Call Securities at a price per Unit equal to the Put
Price as of the date of the Put/Call Event. If the Put Option is not exercised
within the Put Period, then the Company shall have the right to require the
Employee Investor to sell (the "CALL OPTION"), by delivery of a written notice
(the "CALL NOTICE") to the Employee Investor (or, in the case of death or
permanent disability, such Employee Investor's executor, personal representative
or legal representative) within 60 days after the date of the Put/Call Event
(or, if later, the fifth Business Day after all options to purchase Units held
by the Employee Investor have been exercised or expired by their terms) (the
"CALL PERIOD"), and the Employee Investor shall be required to sell, all of the
Put/Call Securities at a price per Unit equal to the Call Price as of the date
of the Put/Call Event. As used herein, "PERMANENT DISABILITY" of an Employee
Investor means a physical or mental medical condition that renders such Employee
Investor unable to perform his or her duties, causing such Employee Investor to
terminate his or her employment with the Company or a subsidiary thereof. Any
Employee Investor who seeks to exercise the Put Option by reason of a permanent
disability shall (i) authorize and direct his or her physicians and other health
care professionals to discuss his or her medical condition with representatives
of the Company (waiving any applicable privilege) and (ii) submit to examination
by physicians designated by the Company.

     (b) If, prior to a Qualified Public Offering, an Employee Investor is
terminated by the Company or a subsidiary of the Company for Cause, then the
Company shall have the right to require the Employee Investor to sell, by
delivery of a written notice (the "CAUSE CALL NOTICE") to the Employee Investor
within 60 days after the date of termination (or, if later, the fifth Business
Day after all options to purchase Units held by the Employee Investor have been
exercised or expired by their terms) (the "CAUSE CALL PERIOD"), and the Employee
Investor shall be required to sell, all of the Put/Call Securities at a price
per Unit equal to the Put Price as of the date of termination.

     (c) The closing of any purchase of Put/Call Securities by the Company
pursuant to this Section 2.3 shall take place at the principal office of the
Company within 15 days after the expiration of the relevant Put Period, Call
Period or Cause Call Period as the Company shall specify to such Employee
Investor (or, in the case of death or permanent disability, such Employee
Investor's executor, personal representative or legal representative) in writing
(or such later date designated by the Company as may be necessary to determine
the Put Price or Call Price or confirm the existence of permanent disability).
At such closing, such Employee Investor (or, in the case of death or permanent
disability, such Employee Investor's executor, personal representative or legal
representative) shall deliver to the Company certificates and/or other
instruments representing, together with stock or other appropriate powers duly
endorsed with

                                        5
<PAGE>
respect to, the Put/Call Securities, free and clear of all liens, encumbrances
or other restrictions (other than pursuant to securities laws or this
Agreement), against payment by the Company of the purchase price for the
Put/Call Securities in cash (by delivery of a check payable to such Employee
Investor (or, in the case of death, such Employee Investor's estate)).
Notwithstanding the foregoing, if the payment of all or any portion of the
purchase price is not permitted to be made at the closing by the terms any
credit agreement(s) relating to the Company's senior debt (collectively, the
"CREDIT AGREEMENT"), or the payment would cause a Default or an Event of Default
(as such terms are defined in any Credit Agreement), then that portion of the
purchase price shall instead become a subordinated obligation of the Company (a
"SUBORDINATE OBLIGATION"); the Subordinated Obligation shall not be payable
during the continuance of a Default or an Event of Default (as defined in any
Credit Agreement) or if such payment would not otherwise be permitted by any
Credit Agreement or would result in a Default or an Event of Default (as defined
under any Credit Agreement). The Subordinate Obligation shall be payable on the
earlier to occur of (i) one day after the closing date of a complete refinancing
of the Company's senior debt and (ii) receipt by the Company of the written
approval of its senior lenders to pay the principal and interest on the
obligation in full. The Subordinate Obligation shall accrue interest at the
weighted average rate applicable from time to time on the Company's senior debt.
The Company shall pre-pay the amount of any Subordinate Obligation, together
with accrued and unpaid interest, as and when it is permitted to do so without
Default (as defined) or creating an Event of Default (as defined) under any
Credit Agreement, provided, that if there is more than one Subordinate
Obligation outstanding under this Agreement and any similar obligation
outstanding under any other agreement of the Company, the Company may continue
to defer payment on all of the Subordinate Obligations hereunder, it may make
pre-payments on the other subordinate obligations if required to do so by such
other agreements, or it may pay such Subordinate Obligations in the proportion
that the outstanding amount thereof (including accrued and unpaid interest)
bears to the aggregate outstanding Subordinate Obligations and other subordinate
obligations (including accrued and unpaid interest).

     (d) If and to the extent an Employee Investor (or, in the case of death or
permanent disability, an Employee Investor 's executor, personal representative
or legal representative) does not deliver a Put Notice within the Put Period or
if the purchase of all Put/Call Securities does not occur at the scheduled
closing date through the fault of such Employee Investor (or his executor,
personal representative or legal representative), then such Employee Investor 's
Put Option shall terminate. If and to the extent the Company does not deliver a
Call Notice or a Cause Call Notice within the Call Period, Cause Call Period, as
applicable, or if the purchase of all Put/Call Securities does not occur at the
scheduled closing date through the fault of the Company, then the Company's Call
Option shall terminate.

     2.4 Special Hardship Purchase.

     (a) If an Employee Investor experiences unexpected economic hardship that
was not reasonably foreseeable when the Employee Investor purchased his Units,
such as illness, and requires liquidity, he may give written notice to the
Company identifying in reasonable detail the circumstances giving rise to the
need for liquidity and requesting the Company to purchase a specified number of
Units at the Put Price (at the date such notice is given) (or, if the Employee
Investor does not know the Put Price, setting forth the aggregate purchase price
for the Units he wishes to sell). The Company shall respond to the Employee
Investor promptly, stating whether it will purchase any Units and, if so, the
number of Units it will purchase and the Put Price per Unit.

     (b) The purchase of Units pursuant to this Section 2.4 shall be subject to
the following conditions:

          (i) the Chief Executive Officer of the Company (or, if the Company is
a limited partnership, the Chief Executive Officer of the general partner of the
Company) has determined that

                                        6
<PAGE>
unexpected economic hardship that was not reasonably foreseeable when the
Employee Investor purchased his Units, such as illness, or other unusual
circumstances make such purchase appropriate to (1) prevent eviction or
foreclosure on the Employee Investor's primary residence, (2) pay unforeseen
medical expenses or (3) pay expenses associated with other unforeseen and
extraordinary economic hardship;

          (ii) the aggregate price paid for the purchase of Units from any
Employee Investor pursuant to this Section 2.4 shall not exceed $20,000; and

          (iii) it is permitted by the Company's credit agreements.

A decision by the Chief Executive Officer to cause the Company to purchase any
Employee Investor's Units shall not be considered a precedent for a subsequent
decision for the same Employee Investor or any other Employee Investor. The
Board may from time to time appoint another individual to act in place of the
Chief Executive Officer for purposes of this Section 2.4.

     (c) The closing of any purchase of Units by the Company pursuant to this
Section 2.4 shall take place at the principal office of the Company within 15
days after the Company's response pursuant to Section 2.4(a), as the Company
shall specify to such Employee Investor. At such closing, such Employee Investor
shall deliver to the Company certificates and/or other instruments representing,
together with stock or other appropriate powers duly endorsed with respect to,
the Units to be purchased by the Company, free and clear of all liens,
encumbrances or other restrictions (other than pursuant to securities laws or
this Agreement), against payment by the Company of the purchase price for the
Units (by delivery of a check payable to such Employee Investor).

     2.5 Termination. The provisions of this Article 2 shall terminate
automatically upon the earlier to occur of (a) an Approved Sale and (b) a
Qualified Public Offering.

                                   ARTICLE 3

                   Covenants of the Company and Other Matters

     3.1 Financial Information. So long as an Employee Investor owns any Unit,
the Company shall furnish or otherwise make available to such Employee Investor
the following:

     (a) as promptly as practicable, and in any event within 90 days after the
end of each fiscal year of the Company, copies of the audited annual
consolidated financial statements of the Company and its subsidiaries, including
a consolidated balance sheet of the Company and its subsidiaries as at the end
of such fiscal year, consolidated statements of income and of cash flow of the
Company and its subsidiaries for such fiscal year and the related notes thereto,
and stating in comparative form the figures as of the end of and for the
previous fiscal year, accompanied by an audit report thereon by a firm of
independent certified public accountants of national recognition, and

     (b) as promptly as practicable, and in any event within 45 days after the
end of each fiscal quarter of the Company, copies of the unaudited quarterly
consolidated financial statements of the Company, including a consolidated
balance sheet of the Company and its subsidiaries as at the end of such fiscal
quarter, and consolidated statements of income and of cash flow of the Company
and its subsidiaries for such fiscal quarter and year to date period, and
stating in comparative form the figures as of the end of and for the
corresponding fiscal quarter and year to date period in the previous fiscal
year; provided, that such statements need not cover periods prior to the date
hereof.

                                        7
<PAGE>
     The Company may require that Employee Investors execute a confidentiality
agreement acceptable to the Company as a condition to the receipt of the
financial information set forth in this Sections 3.1, but such confidentiality
agreement shall not apply to any financial information made publicly available
by the Company in connection with or following a Public Offering.

     3.2 Multiple Voting Stock upon IPO. The Employee Investors hereby agree to
approve and to raise no objection to the implementation, at the election of the
Majority Onex Investors in connection with an initial Public Offering, of a
multiple vote stock to be exchanged for the Units that are held by the Onex
Investors. In the event that such multiple vote stock is issued, the Employee
Investor agrees, so long as such Employee Investor holds Company common stock
exchanged for Units, such Employee Investor will vote for the election to the
Board of individuals designated from time to time by the Majority Onex
Investors. Such voting arrangement will terminate at such time as the Onex
Investors cease to own in the aggregate at least 10% of the Company's equity
securities held by them immediately after giving effect to the initial Public
Offering.

                                    ARTICLE 4

Transfers of Units

     4.1 Transfers in Accordance with this Agreement. The Company may refuse to
register any transfer of Units on its transfer books if such transfer is not in
accordance with this Agreement and state and federal securities laws.

     4.2 Legending of Units Certificates. The Units may be uncertificated. All
certificates representing Units held by any Employee Investor subject to this
Agreement (and by any permitted or required transferees who are bound by or
subject to this Agreement) shall bear the following legend:

     THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
     UNDER THE SECURITIES ACT OF 1933 AND MAY NOT BE SOLD (WITHIN THE MEANING OF
     SUCH ACT) IN THE ABSENCE OF REGISTRATION UNDER SUCH ACT OR AN EXEMPTION
     THEREFROM. THE SECURITIES REPRESENTED BY THIS CERTIFICATE ARE ALSO SUBJECT
     TO CERTAIN RESTRICTIONS ON TRANSFER AND CERTAIN RESTRICTIONS ON THE VOTING
     OF SUCH SECURITIES CONTAINED IN THE EMPLOYEE EQUITYHOLDERS AGREEMENT, DATED
     AS OF FEBRUARY 10, 2005, AMONG THE ISSUER OF SUCH SECURITIES (THE
     "COMPANY") AND CERTAIN OF THE COMPANY'S EQUITYHOLDERS. A COPY OF SUCH
     EMPLOYEE EQUITYHOLDERS AGREEMENT WILL BE FURNISHED WITHOUT CHARGE BY THE
     COMPANY TO THE HOLDER HEREOF UPON WRITTEN REQUEST.

     4.3 Default of Delivery.

     (a) In the event that any Employee Investor, the Company, or any Employee
Investor's transferees or assignees (each, a "REQUIRING PARTY") have the right
to acquire Units from any other Employee Investor or the right to require any
such other Employee Investor to sell its Units to any other Person, pursuant to
the terms of this Agreement (such selling Employee Investor hereinafter referred
to as the "TRANSFEROR" and such Requiring Party or any other Person to whom the
Transferor is required to transfer Units, as applicable, hereinafter referred to
as the "TRANSFEREE") and the Transferor is not present at the closing, or is
present but for any reason fails to produce and deliver to the Transferee the
certificates or other instruments representing any of the Units being
transferred, then the cash purchase price, as and when payable, may be deposited
into a bank account in the name of the Company and any other

                                        8
<PAGE>
consideration permitted or required to be delivered in satisfaction of the
purchase price shall be deposited with the Company. Such deposits shall
constitute valid and effective payment to the Transferor of the purchase price
for the Units being transferred notwithstanding the fact that the Transferor may
have voluntarily attempted to encumber or dispose of any of the Units contrary
to the terms hereof, or that one or more certificates or other evidences of
ownership of such Units may have been delivered to any other Person. From and
after the date of such deposits (even though the Unit certificates in the name
of the Transferor have not been delivered to the Transferee), the purchase by
and transfer of the Units to the Transferee shall be deemed to have been fully
completed and all right, title, benefit and interest of the Transferor in and to
all such Units, both at law and in equity, shall be conclusively deemed to have
been transferred and assigned to and become vested in the Transferee and the
Transferee will have the right to request that the Company enter the transfer
into the Unit register and the Company shall be entitled to so enter the
transfer.

     (b) Where the Transferee has made a deposit in accordance with subsection
(a), the Transferor shall be entitled to receive the cash purchase price of the
Units so deposited with the Company's bankers, and to receive any other
consideration deposited with the Company. Upon delivery to the Company of (i)
the certificates or other instruments representing the Units duly endorsed for
transfer and (ii) any other document required to be delivered by the Transferor
at closing, including, without limitation, the release or discharge of any
encumbrance relating to the Units and stock transfer stamps, if necessary.

                                    ARTICLE 5

                              Certain Definitions

     5.1 Certain Definitions. When used in this Agreement the following terms
shall have the respective meanings shown:

     "AMR" means American Medical Response, Inc.

     "APPROVED SALE" has the meaning set forth in Section 2.2(a).

     "BOARD" means the board of directors of the Company, provided, that at any
time the "Company" is a limited partnership, the "Board" shall mean the board of
directors of the general partner of the Company.

     "BUSINESS DAY" means any day which is neither a Saturday or Sunday nor a
legal holiday on which banks are authorized or required to be closed in New York
City.

     "CALL PRICE" means, as of any date, with respect to any Put/Call
Securities, a per Unit price equal to the quotient of (a) the excess of (i) the
product of 6.5 times EBITDA over (ii) the aggregate amount of the Consolidated
Indebtedness as of the end of the period for which EBITDA is calculated, divided
by (b) the aggregate number of Units outstanding at the time of the relevant
Put/Call Event. If the relevant Put/Call Event occurs prior to the completion of
one full fiscal quarter from the date of this Agreement, the Call Price shall be
the cash price per Unit paid by the Employee Investor for the Put/Call
Securities.

     "CAUSE", with respect to an Employee Investor, means an Employee
Investor's: (a) commission of an act of fraud, embezzlement, misappropriation or
breach of fiduciary duty with respect to the Company or any affiliate of the
Company; (b) conviction of, or plea of guilty or nolo contendere to, any felony;
or (c) refusal, after explicit written notice, to obey any lawful resolution of
or direction by his direct supervisor or the Board; provided, that, as to any
Employee Investor who is party to an employment agreement with the Company or a
subsidiary thereof in which "Cause" is defined, then, as to that Employee
Investor only, the definition of Cause set forth in such agreement shall be
substituted for the foregoing.

                                        9
<PAGE>
     "COMPANY" means Emergency Medical Services L.P., and any successor thereto
resulting from any merger, consolidation or other reorganization of or including
the Company.

     "CONSOLIDATED INDEBTEDNESS" means, as of any date, the aggregate amount
outstanding, on a consolidated basis, of (a) all obligations of the Company or
its subsidiaries for borrowed money, (b) all obligations of the Company or its
subsidiaries evidenced by bonds, debentures, notes or other similar instruments
or upon which interest charges are customarily paid, (c) all obligations of the
Company or its subsidiaries for the deferred purchase price of property or
services, except current accounts payable arising in the ordinary course of
business and not overdue beyond such period as is commercially reasonable for
the Company or its subsidiaries' business, (d) all obligations of the Company or
its subsidiaries under conditional sale or other title retention agreements
relating to property purchased by such Person and all capitalized lease
obligations, (e) all payment obligations of the Company or its subsidiaries on
or for currency protection agreements, (f) all obligations of the Company or its
subsidiaries as an account party under any letter of credit (excluding those
supporting trade payables), (g) all obligations of any third party secured by
property or assets of the Company or its subsidiaries (regardless of whether or
not such Person is liable for repayment of such obligations) and (h) all
guarantees of the Company or its subsidiaries.

     "EBITDA" means the consolidated net income of the Company and its
subsidiaries, adjusted by adding thereto, to the extent deducted in determining
such consolidated net income, interest, taxes, depreciation and amortization for
the four consecutive fiscal quarters immediately preceding the relevant Put/Call
Event, as calculated in accordance with generally accepted accounting principles
in the United States consistently applied, based on the Company's consolidated
financial statements for the applicable period. If fewer than four full fiscal
quarters have elapsed from the date of this Agreement through the date of the
relevant Put/Call Event, EBITDA shall be determined by reference to the results
of such full fiscal quarters, divided by the number of such full fiscal
quarters, and multiplied by four. The Board may make such adjustments to EBITDA
as it determines in good faith are appropriate to reflect non-recurring or
unusual items.

     "EMCARE" means EmCare Holdings Inc.

     "EQUITYHOLDER" means any holder of Units.

     "INVESTOR EQUITYHOLDERS AGREEMENT" means the Investor Equityholders
Agreement, dated February 10, 2005, among the Company, Onex Partners and certain
other holders of Units identified therein, including Management Investors.

     "MAJORITY ONEX INVESTORS" means Onex Investors holding, in the aggregate, a
majority of the Units held by all Onex Investors.

     "MANAGEMENT INVESTORS" means, at any time, the employees of the Company or
any subsidiary who are identified as "Management Investors" under the Investor
Equityholders Agreement.

     "ONEX CORPORATION" means Onex Corporation, an Ontario corporation.

     "ONEX INVESTOR" means Onex Partners, Onex Corporation or any affiliate of
Onex Partners or Onex Corporation that is a holder of Units or other equity
interests of the Company.

     "PERSON" means an individual, a partnership, a joint venture, a
corporation, a limited liability company, a trust, an unincorporated
organization or a government or any department or agency thereof.

                                       10
<PAGE>
     "PUBLIC OFFERING" means a public offering and sale of equity interests of
the Company pursuant to an effective registration statement under the Securities
Act.

     "PUBLIC SALE" means any sale of Units to the public pursuant to an offering
registered under the Securities Act or to the public through a broker or dealer
or to a market maker pursuant to the provisions of Rule 144 (or any similar
provision then in force) adopted under the Securities Act.

     "PUT PRICE" means, as of any date, with respect to any Put/Call Securities,
a per Unit price equal to the quotient of (a) the excess of (i) the product of
4.5 times EBITDA, over (ii) the aggregate amount of the Consolidated
Indebtedness as of the end of the period for which EBITDA is calculated, divided
by (b) the aggregate number of Units outstanding at the time of the relevant
Put/Call Event. If the relevant Put/Call Event occurs prior to the completion of
one full fiscal quarter from the date of this Agreement, the Put Price shall be
the cash price per Unit paid by the Employee Investor for the Put/Call
Securities.

     "PUT/CALL EVENT" has the meaning set forth in Section 2.3(a).

     "PUT/CALL SECURITIES" means all of the Units owned by an Employee Investor.

     "QUALIFIED PUBLIC OFFERING" means the sale in one or more underwritten
public offerings registered under the Securities Act of at least 20% of the
equity interests in the Company outstanding immediately after giving effect to
the most recent such offering.

     "SALE OF THE COMPANY" means any transaction pursuant to which Person(s)
other than the Company's existing equityholders as of the date hereof and their
respective Affiliates acquire (a) equity interests of the Company possessing the
voting power under normal circumstances to elect a majority of the Board
(whether by merger, consolidation, recapitalization, reorganization or sale or
transfer of the Company's equity interests or otherwise) or (b) all or
substantially all of the Company's assets (determined on a consolidated basis).

     "SECURITIES ACT" means the Securities Act of 1933, as amended from time to
time.

     "UNITS" means (a) the Class B units representing the Company's limited
partnership interests purchased, issued to or otherwise acquired by any Employee
Investor, including Units acquired upon the exercise of any warrant or option,
and (b) any equity securities issued or issuable, directly or indirectly, with
respect to the securities referred to in clause (a) by way of dividend or unit
split, exchange or conversion, or in connection with a combination of Units,
shares, recapitalization, merger, consolidation or other reorganization.

                                    ARTICLE 6

                                  Miscellaneous

     6.1 Voting Agreement and Appointment of Proxy.

     (a) The Employee Investors shall at all times vote their Units (to the
extent they are entitled to vote the same) in the same manner as the Units held
by the Majority Onex Investors are voted, on the election of directors and on
all other matters which are submitted to a vote (or consent in lieu of voting)
of the Company's equityholders and on which such Units are entitled to vote. To
the extent permitted by law and for all purposes of this Agreement, each
Employee Investor, by his execution of this Agreement, hereby irrevocably
constitutes and appoints Onex Partners and such other Persons as may from time
to time be designated by the Majority Onex Investors, its proxy with full power
of substitution to vote all of his Units at

                                       11
<PAGE>
any meeting of equityholders of the Company, or to give consent in lieu of
voting, on any matter which is submitted for a vote or consent to the
equityholders, provided, that such Units are voted in the same manner as the
Units held by the Majority Onex Investors. The proxies and powers granted by the
Employee Investors pursuant to this Section 6.1 are coupled with an interest.

     (b) The voting agreement set forth in this Section 6.1 shall terminate
automatically upon an Approved Sale.

     6.2 No Pre-Emptive Rights. No Employee Investor shall have any pre-emptive
or other right to acquire (a) Units, (b) shares of common stock of EmCare, AMR
or any other subsidiary of the Company or (c) securities convertible into or
exercisable for Units or such shares, and neither the Company nor any other
Person shall have any obligation to offer any such securities to any Employee
Investor.

     6.3 Management Representatives. Each of the Employee Investors hereby
irrevocably constitutes and appoints the Management Representatives (as defined
in this Section 6.3) as his representative to take all actions on his behalf in
connection with this Agreement, in their sole and absolute discretion,
including, but not limited to, executing any consents or waivers in connection
with, or any amendments to, this Agreement (but not any decision to request the
Company to purchase his Units pursuant to Section 2.3 or 2.4). The term
"MANAGEMENT REPRESENTATIVE" means any three of the following individuals (or
such lesser number as shall constitute all of the following): the Chief
Executive Officer, the President, the Chief Financial Officer and the General
Counsel of the Company (or, if the Company is a limited partnership, of the
general partner of the Company). The three individuals from whom action as
Management Representatives is sought shall act unanimously and shall include the
Chief Executive Officer unless he is not available on a reasonable basis.

     6.4 Notices. All notices, consents and other communications required or
permitted to be given under or by reason of this Agreement shall be in writing,
shall be delivered personally or by e-mail or telecopy as described below or by
reputable overnight courier, and shall be deemed given on the date on which such
delivery is made, provided, that any such delivery made on a day that is not a
Business Day, or that is made after 5:00 p.m. on a Business Day, shall be deemed
to be given on the following Business Day. If delivered by e-mail or telecopy,
such notices or communications shall be confirmed by a registered or certified
letter (return receipt requested), postage prepaid. Any such delivery shall be
addressed to the intended recipient at the following addresses (or at such other
address for a party as shall be specified by such party by like notice to the
other parties):

     If to the Company:      Emergency Medical Services L.P.
                             6200 S. Syracuse Way - Suite 200
                             Greenwood Village, Colorado 80111
                             Attention: Legal Department
                             Fax: 303-495-1466

     with a copy to:         Onex Investment Corp.
                             712 Fifth Avenue
                             New York, New York 10019
                             Attention: Robert M. Le Blanc
                             Fax: (212) 582-0909

     If to an Onex Investor: c/o Onex Investment Corp.
                             712 Fifth Avenue
                             New York, New York 10019
                             Attention: Robert M. Le Blanc

                                       12
<PAGE>
                             Fax: (212) 582-0909

     with copies to:         Onex American Holdings II LLC
                             21 Leader Street
                             Marion, Ohio 43302
                             Attention: Donald F. West
                             Fax: (740) 223-7762

     and                     Kaye Scholer LLP
                             425 Park Avenue
                             New York, New York 10022
                             Attention: Joel I. Greenberg, Esq.
                             and Lynn Toby Fisher, Esq.
                             Fax: (212) 836-8689

     If to any Employee Investor, at such Employee Investor's address as set
forth on such Employee Investor's signature page hereto.

     If to any other Person which becomes a party to this Agreement in
accordance with the terms hereof, at the address for delivery of notices or
communications given to all other parties by such party at such time.

     6.5 Interpretation. In this Agreement, unless a contrary intention appears,
(a) the words "herein," "hereof" and "hereunder" and other words of similar
import refer to this Agreement as a whole and not to any particular Article,
Section or other subdivision, (b) the words "include," "includes" or "including"
shall be deemed to be followed by the words "without limitation," (c) reference
to any Article or Section means such Article or Section hereof, (d) words of any
gender shall be deemed to include each other gender, and (e) words using the
singular or plural number shall also include the plural or singular number,
respectively. No provision of this Agreement shall be interpreted or construed
against any party hereto solely because such party or its legal representative
drafted such provision.

     6.6 Captions. The captions in this Agreement are for convenience of
reference only and shall not be given any effect in the interpretation of this
Agreement.

     6.7 Governing Law. This Agreement shall be construed in accordance with,
and governed by, the laws of the State of Delaware without regard to conflicts
of laws principles which would result in the application of the laws of another
jurisdiction.

     6.8 Time. Time shall be of the essence of this Agreement.

     6.9 Severability. If any provision of this Agreement is held invalid or
unenforceable by any court of competent jurisdiction, the other provisions of
this Agreement will remain in full force and effect. Any provision of this
Agreement held invalid or unenforceable only in part or degree will remain in
full force and effect to the extent not held invalid or unenforceable.

     6.10 Jurisdiction. The parties hereby irrevocably and unconditionally
consent to submit to the exclusive jurisdiction of the courts of the State of
Delaware and the United States District Court for the District of Delaware for
any actions, suits or proceedings arising out of or relating to this agreement
and the transactions contemplated hereby (and agree not to commence any action,
suit or proceeding relating thereto except in such courts). The parties hereby
irrevocably and unconditionally waive any objection to the laying of venue of
any action, suit or proceeding arising out of this Agreement or the transactions
contemplated

                                       13
<PAGE>
hereby in the courts of the State of Delaware and the United States District
Court from the District of Delaware, and hereby further irrevocably and
unconditionally waive and agree not to plead or claim in any such court that any
such action, suit or proceeding brought in any such court has been brought in an
inconvenient forum.

     6.11 Waiver of Jury Trial. EACH OF THE PARTIES HERETO IRREVOCABLY WAIVES
ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF OR
RELATED TO THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY.

     6.12 Assignment. This Agreement shall be binding upon the parties hereto,
all Employee Investors and, to the extent expressly provided elsewhere in this
Agreement, their respective permitted transferees and assigns (other than
purchasers of equity securities pursuant to a Public Sale), together with in
each case all successors, heirs, executors and administrators thereof, and shall
inure to the benefit of the parties hereto, all Employee Investors and, to the
extent expressly provided elsewhere in this Agreement, assigns of the Employee
Investors, together, in each case, with all successors, heirs, executors and
administrators thereof. Except as otherwise provided herein, no party may assign
any of its rights or delegate any of its duties under this Agreement.

     6.13 Amendment and Waiver. Except as otherwise provided herein, no
modification, amendment or waiver of any provision of this Agreement will be
effective unless such modification, amendment or waiver is approved in writing
by the Company, the Majority Onex Investors and the Management Representatives.
The failure of a party to insist upon strict adherence to any term of this
Agreement on any occasion shall not be considered a waiver or deprive that party
of the right thereafter to insist upon strict adherence to that term or any
other term of this Agreement. No purported waiver shall be effective unless in
writing. The waiver by any party of a breach of any provision of this Agreement
shall not operate or be construed as a waiver of any subsequent or other breach.

     6.14 Remedies. The parties shall be entitled to enforce their rights under
this Agreement specifically to recover damages by reason of any breach of any
provision of this Agreement and to exercise all other rights existing in their
favor. The parties hereto agree and acknowledge that money damages may not be an
adequate remedy for any breach of the provisions of this Agreement and that any
party may in its sole discretion apply to any court of law or equity of
competent jurisdiction for specific performance and/or temporary, preliminary or
permanent injunctive relief (without posting a bond or other security) in order
to enforce or prevent any violation of the provisions of this Agreement.

     6.15 Counterparts; Joinder. This Agreement may be executed in counterparts,
each of which shall be considered an original, but all of which together shall
constitute one and the same instrument. Additional Persons may become parties to
this Agreement in accordance with the provisions of this Agreement or with the
consent of the Company and the Majority Onex Investors, in either case by
executing and delivering to the Company a joinder agreement (which may be in the
form of an additional signature page hereto). Any employee of the Company or its
subsidiaries (other than an employee who is a party to the Investor
Equityholders Agreement) who (i) receives an option to purchase Units under the
Company's Equity Option Plan or (ii) purchases Units under the Company Equity
Purchase Plan, shall, upon execution of an option or subscription agreement
between such employee and the Company, become a party to this Agreement as if
such employee were a signatory hereto.

     6.16 Complete Agreement. This Agreement embodies the complete agreement and
understanding among the parties and supersedes and preempts any prior
understanding, agreements or representations by or among the parties, written or
oral, that may be related to the subject matter hereof in any way.

                             [Signature pages follow]

                                       14
<PAGE>
     IN WITNESS WHEREOF, this Agreement has been duly executed by the parties
hereto, all as of the date first above written.

                                        EMERGENCY MEDICAL SERVICES L.P.

                                        By: Emergency Medical Services
                                            Corporation, its general partner

                                        By: /s/ William A. Sanger
                                            ------------------------------------
                                        Name: William A. Sanger
                                        Title: Chief Executive Officer

                                        ONEX PARTNERS LLC

                                        By: /s/ Robert M. Le Blanc
                                            ------------------------------------
                                        Name: Robert M. Le Blanc
                                        Title: Representative

                                        By: /s/ Donald F. West
                                            ------------------------------------
                                        Name: Donald F. West
                                        Title: Representative

                                        ONEX US PRINCIPALS LP

                                        By: Onex American Holdings GP LLC,
                                            its General Partner

                                        By: /s/ Donald F. West
                                            ------------------------------------
                                        Name: Donald F. West
                                        Title: Representative

                                        EMS EXECUTIVE INVESTCO LLC

                                        By: /s/ Donald F. West
                                            ------------------------------------
                                        Name: Donald F. West
                                        Title: Director

                   [Signature page to Equityholders Agreement]
<PAGE>
                                        ONEX EMSC CO-INVEST LP

                                        By: Onex Partners GP LP, its General
                                            Partner

                                        By: Onex Partners Manager LP, its Agent

                                        By: Onex Partners Manager GP Inc., its
                                            General Partner

                                        By: /s/ Robert M. Le Blanc
                                            ------------------------------------
                                        Name: Robert M. Le Blanc
                                        Title: Managing Director

                                        By: /s/ Donald F. West
                                            ------------------------------------
                                        Name: Donald F. West
                                        Title: Vice President

                                        ONEX PARTNERS LP

                                        By: Onex Partners GP LP, its General
                                            Partner

                                        By: Onex Partners Manager LP, its Agent

                                        By: Onex Partners Manager GP Inc.,
                                            its General Partner

                                        By: /s/ Robert M. Le Blanc
                                            ------------------------------------
                                        Name: Robert M. Le Blanc
                                        Title: Managing Director

                                        By: /s/ Donald F. West
                                            ------------------------------------
                                        Name: Donald F. West
                                        Title: Vice President

                   [Signature page to Equityholders Agreement]
<PAGE>
         [SIGNATURE PAGES OF INDIVIDUAL EMPLOYEES INTENTIONALLY OMITTED]

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