Document:

Third Supplemental Indenture

 EXHIBIT 4.4 
  
 CME GROUP INC. 
 and 
 U.S. BANK NATIONAL ASSOCIATION, 

 as Trustee 
  
  
 Third Supplemental Indenture

 Dated as of August 12, 2008 
 to Senior Debt Indenture 
 Dated as of August 12, 2008 
 Establishing a series of Securities designated 
 5.40% Notes due 2013 
  
  

 THIRD SUPPLEMENTAL INDENTURE, dated as of August 12, 2008 (herein called the “Third
Supplemental Indenture”), between CME Group Inc., a corporation duly organized and existing under the laws of the State of Delaware (herein called the “Company”), and U.S. Bank National Association, a nationally chartered
banking association, as Trustee under the Base Indenture referred to below (herein called the “Trustee”). 
 WITNESSETH:

 WHEREAS, the Company has heretofore executed and delivered to the Trustee an indenture dated as of August 12, 2008 (herein called the
“Base Indenture” and, together with this Third Supplemental Indenture, the “Indenture”), to provide for the issuance from time to time of its unsecured debentures, notes or other evidences of indebtedness (herein
called the “Securities”), the form and terms of which are to be established as set forth in Sections 201 and 301 of the Base Indenture; 
 WHEREAS, Section 901 of the Base Indenture provides, among other things, that the Company and the Trustee may enter into indentures supplemental to the Base Indenture to, among other things, establish the form
and terms of the Securities of any series as permitted in Sections 201 and 301 of the Base Indenture; 
 WHEREAS, the Company desires to
create a series of the Securities in an aggregate principal amount of $750,000,000 to be designated the “5.40% Notes due 2013” (herein called the “Notes”) and all action on the part of the Company necessary to
authorize the issuance of the Notes under the Base Indenture and this Third Supplemental Indenture has been duly taken; 
 WHEREAS, the
Company desires to issue the Notes in accordance with Section 2.3 of this Third Supplemental Indenture and treat the Notes as a single series of Securities for all purposes, as amended or supplemented from time to time in accordance with the
terms of this Third Supplemental Indenture and the Base Indenture; and 
 WHEREAS, all acts and things necessary to make the Notes, when
executed by the Company and completed, authenticated and delivered by the Trustee as provided in the Base Indenture and this Third Supplemental Indenture, the valid and binding obligations of the Company and to constitute a valid and binding
supplemental indenture and agreement according to its terms, have been done and performed. 
 NOW, THEREFORE, THIS THIRD SUPPLEMENTAL
INDENTURE WITNESSETH: 
 That in consideration of the premises and of the acceptance and purchase of the Notes by the Holders thereof and of
the acceptance of this trust by the Trustee, the Company covenants and agrees with the Trustee, for the equal benefit of Holders of the Notes, as follows: 
 ARTICLE ONE 
 DEFINITIONS 
 Except to the extent such terms are otherwise defined in this Third Supplemental Indenture or the context clearly requires otherwise, all terms used in this Third Supplemental Indenture which are defined in the Base
Indenture or the form of Note attached hereto as Exhibit A, have the meanings assigned to them therein. 
 In addition, as used in
this Third Supplemental Indenture, the following terms have the following meanings: 
 “Applicable Procedures” has the
meaning specified in Section 2.6 hereof. 
 “Attributable Debt” with regard to a Sale and Lease-Back Transaction with
respect to any Principal Property means, at the time of determination, the present value of the total net amount of rent required to be paid under such lease during the remaining term thereof (including any period for which such lease has been
extended), discounted at the rate of interest set forth or implicit in the terms of such lease (or, if not practicable to determine 

 
such rate, the weighted average interest rate per annum borne by the securities of all series then Outstanding under the Indenture) compounded semi-annually.
In the case of any lease which is terminable by the lessee upon the payment of a penalty, such net amount shall be the lesser of (x) the net amount determined assuming termination upon the first date such lease may be terminated (in which case
the net amount shall also include the amount of the penalty, but shall not include any rent that would be required to be paid under such lease subsequent to the first date upon which it may be so terminated) or (y) the net amount determined
assuming no such termination. 
 “Bankruptcy Law” means Title 11, U.S. Code or any similar federal or state law for the
relief of debtors. 
 “Base Indenture” has the meaning provided in the recitals hereof. 
 “Below Investment Grade Rating Event” means the Notes are rated below an Investment Grade Rating by each of the Rating Agencies on any
date during the period commencing upon the first public notice of the occurrence of a Change of Control or the Company’s intention to effect a Change of Control and ending 60 days following public notice of the occurrence of the related Change
of Control (which 60-day period shall be extended so long as the rating of the Notes is under publicly announced consideration for possible downgrade by any of the Rating Agencies); provided that a Below Investment Grade Rating Event
otherwise arising by virtue of a particular reduction in rating shall not be deemed to have occurred in respect of a particular Change of Control (and thus shall not be deemed a Below Investment Grade Rating Event for purposes of the definition of
Change of Control Triggering Event hereunder) if the Rating Agencies making the reduction in rating to which this definition would otherwise apply do not announce or publicly confirm or inform the Holders of the Notes in writing at their request
that the reduction was the result, in whole or in part, of any event or circumstance comprising or arising as a result of, or in respect of, the applicable Change of Control (whether or not the applicable Change of Control shall have occurred at the
time of the Below Investment Grade Rating Event). 
 “Business Day” means any calendar day that is not a Saturday, Sunday or
a day on which banking institutions in New York City are authorized or obligated by law or regulation to close. 
 “Capital
Stock” means (i) in the case of a corporation or a company, corporate stock or shares; (ii) in the case of an association or business entity, any and all shares, interests, participations, rights or other equivalents (however
designated) of corporate stock; (iii) in the case of a partnership or limited liability company, partnership or membership interests (whether general or limited); and (iv) any other interest or participation that confers on a person the
right to receive a share of the profits and losses of, or distributions of assets of, the issuing person. 
 “Change of
Control” means the occurrence of any of the following: (1) the direct or indirect sale, transfer, conveyance or other disposition (other than by way of merger or consolidation), in one or a series of related transactions, of all or
substantially all of the assets of the Company and its Subsidiaries taken as a whole to any Person or group of related Persons for purposes of Section 13(d) of the Exchange Act (a “Group”) other than the Company or one of its
Subsidiaries; (2) the approval by the holders of the Company’s common stock of any plan or proposal for the liquidation or dissolution of the Company; (3) the consummation of any transaction (including, without limitation, any merger
or consolidation) the result of which is that any Person or Group becomes the beneficial owner, directly or indirectly, of more than 50% of the then outstanding number of shares of the Company’s Voting Stock; or (4) the first day on which
a majority of the members of the Company’s Board of Directors are not Continuing Directors; provided, however, that a transaction will not be deemed to involve a Change of Control if (1) the Company becomes a direct or
indirect wholly owned Subsidiary of a holding company and (2)(A) the direct or indirect holders of the Voting Stock of such holding company immediately following that transaction are substantially the same as the holders of the Company’s
Voting Stock immediately prior to that transaction or (B) immediately following that transaction no Person or Group (other than a holding company satisfying the requirements of this proviso) is the beneficial owner, directly or indirectly of
more than 50% of the Voting Stock of such holding company. 
 “Change of Control Offer” has the meaning specified in
Section 2.8 hereof. 
 “Change of Control Payment” has the meaning specified in Section 2.8 hereof. 
  

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 “Change of Control Payment Date” has the meaning specified in Section 2.8 hereof.

 “Change of Control Triggering Event” means the occurrence of both a Change of Control and a Below Investment Grade Rating
Event occurring in respect of that Change of Control. 
 “Clearinghouse Facility” means that certain Credit Agreement dated
as of October 12, 2007 among Chicago Mercantile Exchange Inc., each of the banks from time to time party thereto, the Bank of Montreal as administrative agent, JP Morgan Chase Bank, N.A., as collateral agent and BMO Capital Markets Corp. as
lead arranger, as amended, restated, supplemented, increased, extended, renewed, replaced, refinanced (with the same or other lenders) or otherwise modified from time to time. 
 “Company” means the person named as such in the preamble hereof and, subject to the provisions of Article VIII of the Base Indenture as
supplemented by the Third Supplemental Indenture, any successor to that person. 
 “Comparable Treasury Issue” means the
United States Treasury security selected by a Reference Treasury Dealer as having an actual or interpolated maturity comparable to the remaining term of the Notes called for redemption, that would be utilized, at the time of selection and in
accordance with customary financial practice, in pricing new issues of corporate debt securities of comparable maturity to the remaining term of the Notes called for redemption. 
 “Comparable Treasury Price” means, with respect to any Redemption Date, the average, as determined by the Company, of the Reference
Treasury Dealer Quotations for that Redemption Date after excluding the highest and lowest Reference Treasury Dealer Quotation. 
 “Consolidated Net Tangible Assets” means, at any date, the aggregate amount of assets (less applicable reserves) of the Company and its Significant Subsidiaries after deducting therefrom (a) all goodwill, trade names,
trademarks, patents, unamortized debt discount and expense and other like intangibles and (b) all current liabilities (excluding any current liabilities for money borrowed having a maturity of less than 12 months but by its terms being
renewable or extendible beyond 12 months from such date at the option of the borrower), all as reflected in the Company’s most recent consolidated balance sheet as at the end of the Company’s fiscal quarter ending not more than 135 days
prior to such date, prepared in accordance with United States generally accepted accounting principles. 
 “Continuing
Directors” means, as of any date of determination, any member of the Company’s Board of Directors who (1) was a member of the Company’s Board of Directors on the date of the issuance of the Notes; or (2) was nominated
for election, elected or appointed to the Company’s Board of Directors with the approval of a majority of the Continuing Directors who were members of the Company’s Board of Directors at the time of such nomination, election or appointment
(either by a specific vote or by approval of the proxy statement issued by the Company in which such member was named as a nominee for election as a director). 
 “Definitive Securities” means certificated Securities registered in the name of the Holder thereof and issued in accordance with Section 2.2(b) hereof, substantially in the form of Exhibit
A hereto, except that such Security shall not bear the Global Security Legend. 
 “Depositary” means DTC, together with
any Person succeeding thereto by merger, consolidation or acquisition of all or substantially all of its assets, including substantially all of its securities payment and transfer operations. 
 “DTC” means The Depository Trust Company, a New York corporation, having a principal office at 55 Water Street, New York, New York
10041-0099. 
 “Global Security Legend” means the legend set forth in Section 202 of the Base Indenture. 
 “Group” has the meaning given to such term in the definition of “Change of Control” herein. 
  

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 “Indebtedness” means any indebtedness (whether being principal, premium, interest or
other amounts) for or in respect of any notes, bonds, debentures or other instruments for money borrowed or any borrowed money or any liability under or in respect of any banker’s acceptance (other than a daylight overdraft). 
 “Indenture” has the meaning provided in the recitals hereof. 
 “Indirect Participant” means a Person who holds a beneficial interest in a Global Security through a Participant. 
 “Investment Grade Rating” means a rating equal to or higher than Baa3 (or the equivalent) by Moody’s and BBB- (or the equivalent)
by S&P or the equivalent investment grade credit rating from any additional Rating Agency or Rating Agencies selected by the Company. 
 “Issue Date” means August 12, 2008, the date on which the Notes are originally issued under this Third Supplemental Indenture. 
 “Lien” means any lien, mortgage, deed of trust, hypothecation, pledge, security interest, charge or encumbrance of any kind. 
 “Merger Agreement” means the Agreement and Plan of Merger, dated as of March 17, 2008, among the Company, CMEG NY Inc., NYMEX
Holdings, Inc. and New York Mercantile Exchange, Inc., as amended as of June 30, 2008 and July 18, 2008. 
 “Moody’s” means Moody’s Investors Service, Inc. 
 “Notes” has the meaning given to such
term in the recitals hereof. 
 “Optional Redemption Price” has the meaning specified in Section 4.1 hereof.

 “Participant” means, with respect to the Depositary, a Person who has an account with the Depositary. 
 “Permitted Liens” means (a) Liens imposed by law or any governmental authority for taxes, assessments, levies or charges that are
not yet overdue by more than 60 days or are being contested in good faith (and, if necessary, by appropriate proceedings) or for commitments that have not been violated; (b) carriers’, warehousemen’s, mechanics’,
materialmen’s, repairmen’s, landlords’ and similar Liens imposed by law or which arise by operation of law and which are incurred in the ordinary course of business or where the validity or amount thereof is being contested in good
faith (and, if necessary, by appropriate proceedings); (c) Liens incurred or pledges or deposits made in compliance with workers’ compensation, unemployment insurance and other social security laws or regulations; (d) Liens incurred
or pledges or deposits made to secure the performance of bids, trade contracts, tenders, leases, statutory obligations, surety, customs and appeal bonds, performance bonds, customer deposits and other obligations of a similar nature, in each case in
the ordinary course of business; (e) judgment Liens in respect of judgments that do not constitute an Event of Default under the Indenture; (f) Liens securing Indebtedness incurred under the Clearinghouse Facility from time to time;
(g) Liens arising in connection with the operations of the Company or any Significant Subsidiary relating to clearing or settlement activities; (h) Liens on (1) any property or asset prior to the acquisition thereof, provided
that such Lien may only extend to such property or asset, or (2) property of a Significant Subsidiary where (A) such Significant Subsidiary becomes a Subsidiary after August 7, 2008, (B) the Lien exists at the time such
Significant Subsidiary becomes a Subsidiary, (C) the Lien was not created in contemplation of such Significant Subsidiary becoming a Subsidiary, and (D) the principal amount secured by the Lien at the time such Significant Subsidiary
becomes a Subsidiary is not subsequently increased or extended to any other assets other than those owned by the entity becoming a Subsidiary; (i) any Lien existing on August 7, 2008; (j) Liens upon fixed, capital, real and/or
tangible personal property acquired after August 7, 2008 (by purchase, construction, development, improvement, capital lease, Synthetic Lease or otherwise) by the Company or any Significant Subsidiary, each of which Liens was created for the
purpose of securing Indebtedness representing, or incurred to finance, refinance or refund, the cost (including the cost of construction, development or improvement) of such property; provided that no such Lien shall extend to or cover any
property 

  

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other than the property so acquired and improvements thereon; (k) Liens in favor of the Company or any Subsidiary; (l) Liens arising from
the sale of accounts receivable for which fair equivalent value is received; (m) any extension, renewal or replacement (or successive extensions, renewals or replacements) in whole or in part, of any Liens referred to in the foregoing clauses
(f), (g), (h), (i), (j), (k) and (l); provided that the principal amount of Indebtedness secured thereby and not otherwise authorized as a Permitted Lien shall not exceed the principal amount of Indebtedness, plus any premium or
fee payable in connection with any such extension, renewal or replacement, so secured at the time of such extension, renewal or replacement; (n) Liens securing obligations of the Company or any Subsidiary of the Company in respect of any swap
agreements entered into (1) in the ordinary course of business and for non-speculative purposes or (2) solely in order to serve as a clearinghouse in respect thereof; (o) easements, zoning restrictions, minor title defects,
irregularities or imperfections, restrictions on use, rights of way, leases, subleases and similar charges and other similar encumbrances on real property imposed by law or arising in the ordinary course of business that do not secure any monetary
obligations (other than customary maintenance requirements) and which could not reasonably be expected to have a material adverse effect on the business or financial condition of the Company and its Subsidiaries taken as a whole; (p) Liens
created in connection with any share repurchase program in favor of any broker, dealer, custodian, trustee and/or agent administering or effecting transactions pursuant to a share repurchase program; (q) Liens on (1) the land,
improvements, fixtures and three buildings located at 141 West Jackson Boulevard in Chicago, consisting of a total of approximately 1,500,000 square feet, and (2) the land, improvements, buildings and fixtures located at One North End Ave, New
York, New York 10282; and (r) Liens consisting of an agreement to sell, transfer or dispose of any asset or property (to the extent such sale, transfer or disposition is not prohibited by Article VIII of the Base Indenture). 
 “Person” means any individual, firm, corporation, partnership, association, joint venture, tribunal, trust, government or political
subdivision or agency or instrumentality thereof, or any other entity or organization and includes a “person” as used in Section 13(d)(3) of the Exchange Act. 
 “Principal Property” means the land, improvements, buildings and fixtures (including any leasehold interest therein) constituting a
corporate office, facility or other capital asset within the United States (including its territories and possessions) which is owned or leased by the Company or any of its Significant Subsidiaries unless the Company’s Board of Directors has
determined in good faith that such office or facility is not of material importance to the total business conducted by the Company and its Significant Subsidiaries taken as a whole; provided that, with respect to any Sale and Lease-Back
Transaction or series of related Sale and Lease-Back Transactions, the determination of whether any property is a Principal Property shall be determined by reference to all properties affected by such transaction or series of transactions.

 “Proposed Credit Facilities” means (1) the proposed 364-day, up to $3.2 billion bridge loan facility represented by
a commitment letter, dated July 21, 2008, between the Company and Bank of America, N.A., Banc of America Securities LLC, UBS Loan Finance LLC and UBS Securities LLC and (2) the proposed up to $1.5 billion in senior credit facilities
represented by a commitment letter, dated July 21, 2008, between the Company and Bank of America, N.A., Banc of America Securities LLC, UBS Loan Finance LLC and UBS Securities LLC, as amended, restated, supplemented, increased, extended,
renewed, replaced, refinanced (with the same or other lenders) or otherwise modified from time to time. 
 “Rating Agencies”
means (1) each of Moody’s and S&P; and (2) if any of Moody’s or S&P ceases to rate the Notes or fails to make a rating of the Notes publicly available for reasons outside of the Company’s control, a “nationally
recognized statistical rating organization” within the meaning of Rule 15c3-1(c)(2)(vi)(F) under the Exchange Act, selected by the Company (as certified by an executive officer of the Company) as a replacement agency for Moody’s or
S&P, or both of them, as the case may be. 
 “Reference Treasury Dealer” means each of Banc of America Securities LLC,
UBS Securities LLC and two other primary U.S. Government securities dealers selected by the Company, and each of their respective successors; provided that if any one shall cease to be a primary U.S. Government securities dealer, the Company
will substitute another nationally recognized investment banking firm that is a primary U.S. Government securities dealer. 
  

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 “Reference Treasury Dealer Quotation” means, with respect to each Reference Treasury
Dealer and any Redemption Date, the average, as determined by the Company, of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Company by such
Reference Treasury Dealer at 3:30 p.m., New York City time, on the third Business Day preceding that Redemption Date. 
 “Regular
Record Date” for the interest payable on any Interest Payment Date means the fifteenth day, whether or not a Business Day, immediately preceding the applicable Interest Payment Date. 
 “Remaining Scheduled Payments” means the remaining scheduled payments of principal of and interest on the Notes called for redemption
that would be due after the related Redemption Date but for that redemption; provided that if that Redemption Date is not an Interest Payment Date with respect to the Notes called for redemption, the amount of the next succeeding scheduled
interest payment on such Notes will be reduced by the amount of interest accrued to such Redemption Date. 
 “S&P” means
Standard & Poor’s Rating Services, a division of The McGraw-Hill Companies, Inc. 
 “Sale and Lease-Back
Transaction” means any arrangement with any person providing for the leasing by the Company or any of its Significant Subsidiaries of any Principal Property, whether now owned or hereafter acquired, which Principal Property has been or is
to be sold or transferred by the Company or such Significant Subsidiary to such person. 
 “Securities” has the meaning
given to such term in the recitals hereof. 
 “Significant Subsidiary,” with respect to any person, means any Subsidiary of
such person that satisfies the criteria for a “significant subsidiary” set forth in Rule 1-02(w) of Regulation S-X under the Exchange Act. 
 “Special Mandatory Redemption Date” means the earlier to occur of (1) January 31, 2009 if the proposed merger with NYMEX Holdings, Inc. has not been completed on or prior to
December 31, 2008 or (2) the 30th day (or if such day is not a Business Day, the first Business Day thereafter) following the termination of the Merger Agreement. 
 “Special Mandatory Redemption Price” means 101% of the aggregate principal amount of the Notes, plus accrued and unpaid interest from
the Issue Date to, but excluding, the Special Mandatory Redemption Date. 
 “Subsidiary” means any corporation, limited
liability company or other similar type of business entity in which the Company and/or one or more of its Subsidiaries together own more than 50% of the total voting power of shares of Capital Stock entitled (without regard to the occurrence of any
contingency) to vote in the election of the board of directors or similar governing body of such corporation, limited liability company or other similar type of business entity, directly or indirectly. 
 “Synthetic Lease” means any tax retention or other synthetic lease which is treated as an operating lease under United States generally
accepted accounting principles, but the liabilities under which are or would be characterized as indebtedness for tax purposes. 
 “Third Supplemental Indenture” has the meaning provided in the preamble hereof. 
 “Treasury Rate”
means, with respect to any Redemption Date, the rate per annum equal to the semiannual equivalent yield to maturity (computed as of the third Business Day immediately preceding that Redemption Date) of the Comparable Treasury Issue, assuming a price
for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for that Redemption Date. 
 “Trustee” means the person named as such in the preamble hereof and, subject to the provisions of Article VI of the Base Indenture, any successor to that person. 
  

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 “Voting Stock” of any specified Person as of any date means the Capital Stock of such
Person that is at the time entitled to vote generally in the election of the Board of Directors of such Person. 
 ARTICLE TWO 
 THE NOTES 
 Section 2.1. Issue of
Notes. A series of Securities which shall be designated the “5.40% Notes due 2013” shall be executed, authenticated and delivered in accordance with the provisions of, and shall in all respects be subject to, the terms, conditions and
covenants of, the Base Indenture and this Third Supplemental Indenture (including the form of Notes set forth hereto as Exhibit A). The aggregate principal amount of Notes which may be authenticated and delivered under this Third
Supplemental Indenture shall not, except as permitted by the provisions of the Base Indenture, initially exceed $750,000,000; provided that the Company may from time to time or at any time, without the consent of the Holders of the Notes,
issue additional Notes, which additional Notes shall increase the aggregate principal amount of, and shall be consolidated and form a single series with, the Notes. 
 Section 2.2. Form of Notes; Incorporation of Terms. (a) The Notes shall be issued initially in the form of one or more Global Securities and, together with the Trustee’s certificate of
authentication thereon, shall be in substantially the form set forth in Exhibit A attached hereto. The Notes may have such notations, legends or endorsements approved as to form by the Company and required, as applicable, by law, stock
exchange or depository rules and agreements to which the Company is subject and/or usage. The terms of the Notes set forth in Exhibit A are herein incorporated by reference and are part of the terms of this Third Supplemental Indenture.
The Notes shall be issuable in definitive, fully registered form without coupons only in minimum denominations of $2,000 and any integral multiples of $1,000 in excess thereof. 
 (b) Notes issued in global form shall be substantially in the form of Exhibit A attached hereto (including the Global Security Legend thereon).
Notes issued in definitive certificated form in accordance with the terms of the Base Indenture and this Third Supplemental Indenture, if any, shall be substantially in the form of Exhibit A attached hereto (but without the Global Security
Legend thereon). Each Global Security shall represent such of the outstanding Notes as shall be specified therein and each shall provide that it shall represent the aggregate principal amount of Outstanding Notes from time to time endorsed thereon
and that the aggregate principal amount of outstanding Notes represented thereby may from time to time be reduced or increased, as appropriate, to reflect exchanges and redemptions. Any endorsement of a Global Security to reflect the amount of any
increase or decrease in the aggregate principal amount of Outstanding Notes represented thereby shall be made by the Trustee in accordance with instructions given by the Holder thereof as required by Section 2.6 hereof. 
 Section 2.3. Execution and Authentication. The Trustee, upon a Company Order and pursuant to the terms of the Base Indenture and this Third
Supplemental Indenture, shall authenticate and deliver the Notes for original issue in an initial aggregate principal amount of $750,000,000. Such Company Order shall specify the amount of the Notes to be authenticated and the date on which the
original issue of Notes is to be authenticated. All of the Notes issued under this Third Supplemental Indenture shall be treated as a single series for all purposes under the Base Indenture and this Third Supplemental Indenture, including, without
limitation, waivers, amendments and offers to purchase. 
 Section 2.4. Global Securities. The Depositary for the Global
Securities issued under this Third Supplemental Indenture shall be DTC in the City of New York. The provisions of clauses (1), (2), (3) and (4) below shall apply only to Global Securities: 
 (1) Each Global Security authenticated under this Third Supplemental Indenture shall be registered in the name of the Depositary designated for such
Global Security or a nominee thereof and delivered to such Depositary or a nominee thereof or custodian therefor, and each such Global Security shall constitute a single Security for all purposes of the Indenture. 
 (2) Notwithstanding any other provision in the Indenture, no Global Security may be exchanged in whole or in part for Securities registered, and no
transfer of a Global Security in whole or in part may be registered, in the name of any Person other than the Depositary for such Global Security or a nominee thereof unless (A) such 

  

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Depositary has notified the Company that it is unwilling or unable or no longer permitted under applicable law to continue as Depositary for such Global
Security and the Company has not appointed a successor Depositary within 90 days of receipt of such notice, (B) there shall have occurred and be continuing an Event of Default with respect to such Global Security or (C) the Company so
directs the Trustee by Company Order. 
 (3) Subject to clause (2) above, any exchange of a Global Security for other Securities may be
made in whole or in part, and all Securities issued in exchange for a Global Security or any portion thereof shall be registered in such names as the Depositary for such Global Security shall direct. 
 (4) Every Security authenticated and delivered upon registration of transfer of, or in exchange for or in lieu of, a Global Security or any portion
thereof, shall be authenticated and delivered in the form of, and shall be, a Global Security, unless such Security is registered in the name of a Person other than the Depositary for such Global Security or a nominee thereof. 
 Section 2.5. Place of Payment. The Place of Payment in respect of the Notes will be at the office or agency of the Company in The City of New
York, State of New York or at the office or agency of the Paying Agent in The City of New York, State of New York. 
 Section 2.6.
Transfer and Exchange. 
 (a) The transfer and exchange of beneficial interests in the Global Securities shall be effected through the
Depositary, in accordance with the provisions of the Base Indenture, this Third Supplemental Indenture and the then applicable procedures of the Depositary (the “Applicable Procedures”). In connection with all transfers and
exchanges of beneficial interests, the transferor of such beneficial interest must deliver to the Trustee either (A)(1) a written order from a Participant or an Indirect Participant given to the Depositary in accordance with the Applicable
Procedures directing the Depositary to credit or cause to be credited a beneficial interest in another Global Security in an amount equal to the beneficial interest to be transferred or exchanged and (2) instructions given in accordance with
the Applicable Procedures containing information regarding the Participant account to be credited with such increase or, if Definitive Securities are at such time permitted to be issued pursuant to this Third Supplemental Indenture and the Base
Indenture, (B)(1) a written order from a Participant or an Indirect Participant given to the Depositary in accordance with the Applicable Procedures directing the Depositary to cause to be issued a Definitive Security in an amount equal to the
beneficial interest to be transferred or exchanged and (2) instructions given by the Depositary to the Security Registrar containing information regarding the Person in whose name such Definitive Security shall be registered to effect the
transfer or exchange referred to in (1) above. Upon satisfaction of all of the requirements for transfer or exchange of beneficial interests in Global Securities contained in the Base Indenture, this Third Supplemental Indenture and the Notes
or otherwise applicable under the Securities Act, the Security Registrar shall adjust the principal amount of the relevant Global Securities pursuant to Section 2.7 hereof. 
 (b) Upon request by a Holder of Definitive Securities and such Holder’s compliance with the provisions of this Section 2.6(b), the Security
Registrar shall register the transfer or exchange of Definitive Securities. Prior to such registration of transfer or exchange, the requesting Holder shall present or surrender to the Trustee the Definitive Securities duly endorsed or accompanied by
a written instruction of transfer in form satisfactory to the Security Registrar duly executed by such Holder or by its attorney, duly authorized in writing. The Trustee shall cancel any such Definitive Securities so surrendered, and the Company
shall execute and, upon receipt of a Company Order pursuant to Section 303 of the Base Indenture, the Trustee shall authenticate and deliver to the Person designated in the instructions a new Definitive Security in the appropriate principal
amount. Any Definitive Security issued pursuant to this Section 2.6(b) shall be registered in such name or names and in such authorized denomination or denominations as the Holder of such beneficial interest shall instruct the Security
Registrar through instructions from the Depositary and the Participant or Indirect Participant. The Trustee shall deliver such Definitive Securities to the Persons in whose names such Definitive Securities are so registered. In addition, the
requesting Holder shall provide any additional certifications, documents and information, as applicable, required pursuant to Section 305 of the Base Indenture. 
 Section 2.7. Cancellation and/or Adjustment of Global Securities. At such time as all beneficial interests in a particular Global Security have been exchanged for Definitive Securities or a particular
Global Security has been redeemed, repurchased or cancelled in whole and not in part, each such Global Security shall be returned to or 

  

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retained and cancelled by the Trustee in accordance with Section 309 of the Base Indenture. At any time prior to such cancellation, if any beneficial
interest in a Global Security is exchanged for or transferred to a Person who will take delivery thereof in the form of a beneficial interest in another Global Security or for Definitive Securities, the principal amount of Securities represented by
such Global Security shall be reduced accordingly and an endorsement shall be made on such Global Security by the Trustee or by the Depositary at the direction of the Trustee to reflect such reduction; and if the beneficial interest is being
exchanged for or transferred to a Person who will take delivery thereof in the form of a beneficial interest in another Global Security, such other Global Security shall be increased accordingly and an endorsement shall be made on such Global
Security by the Security Registrar or by the Depositary at the direction of the Security Registrar to reflect such increase. 
 Section 2.8. Repurchase upon Change of Control Triggering Event. 
 (a) If a Change of Control Triggering Event occurs
with respect to the Notes, unless the Company shall have exercised its right pursuant to Section 4.1 hereof to redeem the Notes, the Company shall make an offer to each Holder of the Notes to repurchase all or, at such Holder’s option, any
part (equal to $2,000 or any integral multiple of $1,000 in excess thereof) of such Holder’s Notes (the “Change of Control Offer”) for payment in cash equal to 101% of the aggregate principal amount of the Notes repurchased
plus accrued and unpaid interest, if any, on the Notes repurchased to, but not including, the date of purchase (the “Change of Control Payment”). 
 (b) Within 30 days following any Change of Control Triggering Event with respect to the Notes or, at the Company’s option, prior to any Change of Control but after the public announcement of the transaction or
transactions that constitutes or may constitute a Change of Control, the Company shall cause a notice to be mailed to Holders of the Notes, with a copy to the Trustee for the Notes, describing the transaction or transactions that constitute or may
constitute the Change of Control Triggering Event and offering to repurchase the Notes on the date specified in the notice, which date shall be no earlier than 30 days and no later than 60 days from the date such notice is mailed (the
“Change of Control Payment Date”), pursuant to the procedures required by the Notes and described in such notice. The notice shall, if mailed prior to the date of consummation of the Change of Control, state that the offer to
purchase is conditioned on the Change of Control Triggering Event occurring on or prior to the Change of Control Payment Date. Upon 10 Business Days’ advance notice to the Trustee, the Company may request the Trustee to mail the notice to
Holders described in this Section 2.8(b) in the name of and at the expense of the Company. 
 (c) The Company shall comply with the
requirements of Rule 14e-1 under the Exchange Act and any other securities laws and regulations thereunder to the extent such laws and regulations are applicable in connection with the repurchase of Notes as a result of a Change of Control
Triggering Event. To the extent that the provisions of any such securities laws or regulations conflict with this Section 2.8, the Company shall comply with those securities laws and regulations and shall not be deemed to have breached its
obligations under this Section 2.8 by virtue of such conflict. 
 (d) On the Change of Control Payment Date, the Company shall, to the
extent lawful: 
 (i) accept for payment all Notes or portions of Notes properly tendered pursuant to the Change of Control
Offer; 
 (ii) deposit with the Paying Agent an amount equal to the Change of Control Payment in respect of all Notes or
portions of Notes properly tendered; and 
 (iii) deliver or cause to be delivered to the Trustee the Notes properly accepted
together with an Officer’s Certificate stating the aggregate principal amount of Notes or portions of Notes being purchased by the Company. 
 (e) The Paying Agent shall promptly mail, to each Holder who properly tendered Notes, the purchase price for such Notes, and the Trustee shall promptly authenticate and mail (or cause to be transferred by book entry) to each such Holder a
new Note equal in principal amount to any unpurchased portion of the Notes surrendered, if any; provided that each new Note will be in a principal amount of $2,000 or an integral multiple of $1,000 in excess thereof. 
  

 9 

 (f) The Company shall not be required to make a Change of Control Offer upon a Change of Control
Triggering Event if a third party makes a Change of Control Offer in the manner, at the times and otherwise in compliance with the requirements set forth in this Third Supplemental Indenture applicable to a Change of Control Offer made by the
Company and purchases all Notes properly tendered and not withdrawn under such Change of Control Offer. In the event that such third party terminates or defaults on its Change of Control Offer, the Company shall be required to make a Change of
Control Offer treating the date of such termination or default as though it were the date of the Change of Control Triggering Event. 
 (g)
The Company shall not be required to purchase any Notes if there has occurred and is continuing on the Change of Control Payment Date an Event of Default under the Indenture, other than a default in the payment of the Change of Control Payment.

 ARTICLE THREE 
 COVENANTS

 Section 3.1. Limitations on Liens. The Company shall not (nor shall it permit any of its Significant Subsidiaries to) create
or permit to exist any Lien on any Principal Property of the Company or any of its Significant Subsidiaries (or on any Capital Stock of a Significant Subsidiary), whether such Principal Property or Capital Stock is now existing or owned or hereafter
acquired, to secure any Indebtedness, unless the Company shall contemporaneously secure the Notes (together with, if the Company so determines, any other Indebtedness of or guaranty by the Company or such Significant Subsidiary then existing or
thereafter created which is not subordinated to the Notes) equally and ratably with (or, at the Company’s option, prior to) such secured Indebtedness. 
 The foregoing restriction, however, shall not require the Company to secure the Notes if the Lien consists of either of the following: 
 (a) Permitted Liens; or 
 (b) Liens securing Indebtedness if at the time of determination, after giving pro
forma effect to the incurrence, creation, assumption or guaranty of such Indebtedness or the securing of outstanding Indebtedness and to the retirement of Indebtedness which is concurrently being retired, the sum of (without duplication)
(i) the aggregate principal amount of all Indebtedness of the Company and its Subsidiaries secured by Liens (other than Permitted Liens) and (ii) all Attributable Debt in respect of Sale and Lease-Back Transactions not otherwise permitted
under the first sentence of Section 3.2 hereof, does not exceed fifteen percent of Consolidated Net Tangible Assets. 
 Section 3.2. Limitation on Sale and Lease-Back Transactions. The Company shall not, and shall not permit any of its Significant Subsidiaries to, enter into any Sale and Lease-Back Transaction with respect to any Principal
Property, other than (x) any such Sale and Lease-Back Transaction with respect to (i) the land, improvements, fixtures and three buildings located at 141 West Jackson Boulevard in Chicago, consisting of a total of approximately 1,500,000
square feet, or (ii) the land, improvements, buildings and fixtures located at One North End Ave, New York, New York 10282, (y) any such Sale and Lease-Back Transaction involving a lease for a term of not more than three years or
(z) any such Sale and Lease-Back Transaction between the Company and one of its Subsidiaries or between its Subsidiaries, unless: 
 (a)
the Company or such Significant Subsidiary, as applicable, could have incurred Indebtedness secured by a Lien on the Principal Property involved in such Sale and Lease-Back Transaction in an amount at least equal to the Attributable Debt with
respect to such Sale and Lease-Back Transaction, without equally and ratably securing the Notes, pursuant to Section 3.1 hereof; or 
  

 10 

 (b) the proceeds of such Sale and Lease-Back Transaction are at least equal to the fair market value of
the affected Principal Property (as determined in good faith by the Company’s Board of Directors) and the Company applies an amount equal to the net proceeds of such Sale and Lease-Back Transaction within 365 days of such Sale and Lease-Back
Transaction to any (or a combination) of: 
 (i) the prepayment or retirement of the Notes, 
 (ii) the prepayment or retirement (other than any mandatory retirement, mandatory prepayment or sinking fund payment or by payment at
maturity) of other Indebtedness of the Company or of one of its Subsidiaries (other than Indebtedness that is subordinated to the Notes or Indebtedness owed to the Company or one of its Subsidiaries) that matures more than 12 months after its
creation; or 
 (iii) the purchase, construction, development, expansion or improvement of other comparable property.

 Notwithstanding the foregoing, the Company and its Significant Subsidiaries shall be allowed to enter into any Sale and Lease-Back
Transaction if, after giving pro forma effect to such Sale and Lease-Back Transaction, the sum of (without duplication) (i) the aggregate principal amount of all Indebtedness of the Company and its Subsidiaries secured by Liens (other than
Permitted Liens) and (ii) all Attributable Debt in respect of Sale and Lease-Back Transactions not otherwise permitted under the first sentence of this Section 3.2, does not exceed fifteen percent of Consolidated Net Tangible Assets.

 Section 3.3. Limitations on Mergers and Other Transactions. The provisions of Article VIII of the Base Indenture shall be
applicable to the Notes (except that the reference in Section 801 of the Base Indenture to Section 1009 of the Base Indenture shall not apply to the Notes). 
 ARTICLE FOUR 
 REDEMPTION 
 Section 4.1. Optional Redemption by Company. 
 (a) Subject to Article XI of the Base Indenture,
the Company shall have the right to redeem the Notes, at any time in whole or from time to time in part, at a redemption price (the “Optional Redemption Price”) equal to the greater of: 
 (i) 100% of the principal amount of the Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the Redemption Date; or 
 (ii) the sum of the present values of the Remaining Scheduled Payments of principal and interest in respect of the Notes to be redeemed discounted to the
Redemption Date (excluding interest accrued to the Redemption Date) on a semiannual basis (assuming a 360-day year consisting of twelve 30-day months), at a rate equal to the Treasury Rate plus 35 basis points, plus accrued and unpaid interest to,
but excluding, the Redemption Date. 
 On and after a Redemption Date, interest will cease to accrue on the Notes called for redemption
(unless the Company defaults in the payment of the Optional Redemption Price and accrued interest). On or before a Redemption Date, the Company will deposit with a Paying Agent (or the Trustee) money sufficient to pay the Optional Redemption Price
of and accrued interest on the Notes to be redeemed on that date. If less than all of the Notes are to be redeemed, the Notes to be redeemed shall be selected by the Trustee pro rata or by lot or by a method the Trustee deems to be fair and
appropriate; provided that if at the time of redemption the Notes to be redeemed are registered as one or more Global Securities, the Depositary shall determine, in accordance with its procedures, the principal amount of the Notes to be
redeemed held by each Holder of such Notes. 
 (b) Notice of any redemption pursuant to this Section 4.1 shall be given as provided in
Section 1104 of the Base Indenture, except that any notice of such redemption shall not specify the related Optional Redemption Price 

  

 11 

 
but only the manner of calculation thereof. The Trustee shall not be responsible for the calculation of such Optional Redemption Price. The Company shall
calculate such Optional Redemption Price and promptly notify the Trustee thereof. 
 Section 4.2. Special Mandatory Redemption.
If, for any reason, (i) the Company’s proposed merger with NYMEX Holdings, Inc. is not completed on or prior to December 31, 2008 or (ii) the Merger Agreement is terminated on or prior to December 31, 2008, the Company
shall redeem all of the Notes on the Special Mandatory Redemption Date at the Special Mandatory Redemption Price. Notice of such redemption shall be mailed, with a copy to the Trustee, promptly after the occurrence of the event triggering such
redemption to each Holder of Notes in accordance with Section 1104 of the Base Indenture. If funds sufficient to pay the Special Mandatory Redemption Price (including any accrued and unpaid interest) of all of the Notes to be redeemed on the
Special Mandatory Redemption Date are deposited with the Paying Agent on or before 10:00 a.m., New York City time, on the Special Mandatory Redemption Date, the Notes shall cease to accrue interest on and after the Special Mandatory Redemption Date,
and all rights under the Notes, other than the right to receive the Special Mandatory Redemption Price, shall terminate. 
 ARTICLE FIVE

 REMEDIES 
 Section 5.1. Events of Default. The provisions of Section 501 of the Base Indenture shall be applicable to the Notes; provided, however, that clauses (1), (2), (3), (4), (5), (6) and (7) of
Section 501 of the Base Indenture shall, with respect to the Notes only, read as follows: 
 “(1) default in the
payment of any interest on any Note when it becomes due and payable, and continuance of such default for a period of 30 days; 
 (2) default in the payment of the principal of or premium, if any, on any Note when it becomes due and payable, at its Maturity, upon acceleration, upon redemption or otherwise (including the failure to make a payment to purchase the Notes
tendered pursuant to a Change of Control Offer); 
 (3) default in the performance, or breach, of any covenant or warranty
contained in the Indenture (other than a covenant or warranty a default in the performance or the breach of which is specifically dealt with elsewhere in the Indenture or which is expressly included in the Indenture solely for the benefit of a
particular series of debt instruments other than the Notes), and continuance of such default or breach for a period of 60 days after there has been given to the Company by the Trustee or to the Company and the Trustee by the Holders of at least 25%
in principal amount of the Outstanding Notes a written notice specifying such default or breach (and demanding that such default be remedied) and stating that such notice is a “Notice of Default” under the Indenture; 
 (4) default on any indebtedness of the Company or any of its Significant Subsidiaries having an aggregate amount of at least $100,000,000
(or if the Company enters into the Proposed Credit Facilities and the corresponding event of default therein contains an amount greater than $100,000,000, such greater amount), constituting a default either (a) of payment of principal when due
and payable (whether at scheduled maturity, required prepayment, acceleration, demand or otherwise) or (b) which results in acceleration of the indebtedness, and continuance of such default for a period of 30 days after there has been given to
the Company by the Trustee or to the Company and the Trustee by the Holders of at least 25% in principal amount of the Outstanding Notes a written notice specifying such default and stating that such notice is a “Notice of Default” under
the Indenture; 
 (5) the entry by a court having jurisdiction in the premises of (A) a decree or order for relief in
respect of the Company or any of its Significant Subsidiaries in an involuntary case or proceeding under any applicable Bankruptcy Law, insolvency, reorganization or other similar law or (B) a decree or order adjudging the Company or any of its
Significant Subsidiaries as bankrupt 

  

 12 

 
or insolvent, or approving as properly filed a petition seeking reorganization, arrangement, adjustment or composition of or in respect of the Company or any
of its Significant Subsidiaries under any applicable Bankruptcy Law, or appointing a custodian, receiver, liquidator, assignee, trustee, sequestrator or other similar official of the Company or any of its Significant Subsidiaries or of any
substantial part of its or their property, or ordering the winding up or liquidation of its or their affairs, and the continuance of any such decree or order for relief or any such other decree or order unstayed and in effect for a period of 60
consecutive days; 
 (6) the commencement by the Company or any of its Significant Subsidiaries of a voluntary case or
proceeding under any applicable Bankruptcy Law or of any other case or proceeding to be adjudicated a bankrupt or insolvent, or the consent by it or any of them to the entry of a decree or order for relief in respect of the Company or any of its
Significant Subsidiaries in an involuntary case or proceeding under any applicable Bankruptcy Law, insolvency, reorganization or other similar law or to the commencement of any bankruptcy or insolvency case or proceeding against it or any of them,
or the filing by it or any of them of a petition or answer or consent seeking reorganization or relief under any applicable Federal or State law, or the consent by it or any of them to the filing of such petition or to the appointment of or taking
possession by a custodian, receiver, liquidator, assignee, trustee, sequestrator or other similar official of the Company or any of its Significant Subsidiaries or of any substantial part of its property, or the making by it or any of them of an
assignment for the benefit of creditors, or the admission by it or any of them in writing of its inability to pay its debts generally as they become due, or the taking of corporate action by the Company or any of its Significant Subsidiaries in
furtherance of any such action; or 
 (7) one or more judgments for the payment of money in an aggregate amount in excess of
$100,000,000 above available insurance or indemnity coverage shall be rendered against the Company or any of its Significant Subsidiaries and the same shall remain undischarged for a period of 45 consecutive days during which execution shall not be
effectively stayed, but only if such judgment is an event of default at that time under any of the Company’s Proposed Credit Facilities or any credit facility that the Company enters into to replace a Proposed Credit Facility at its maturity or
otherwise.” 
 Section 5.2. Acceleration of Maturity; Rescission and Annulment. The provisions of Section 502 of the
Base Indenture shall be applicable to the Notes; provided, however, that with respect to the Notes only, the amount that shall become due and payable pursuant to any acceleration under Section 502 of the Base Indenture shall
include the principal amount of and premium, if any, on the Notes plus accrued and unpaid interest through the date of such acceleration. 
 ARTICLE SIX 
 RANKING 
 Section 6.1. Senior in Right of Payment. The Notes shall be direct senior obligations of the Company and shall rank (a) senior in right of payment to all existing and future indebtedness that is, by its terms, expressly
subordinated in right of payment to the Notes and (b) pari passu in right of payment with all other unsecured senior indebtedness of the Company. The Notes are not guaranteed. 
 ARTICLE SEVEN 
 REPORTS 
 Section 7.1. Reports by Company. The Base Indenture is hereby amended, with respect to the Notes only, by replacing the text of
Section 704 thereof with the following text: 
 “The Company shall file with the Trustee and the Commission, and
transmit to Holders, such information, documents and other reports, and such summaries thereof, as may be required pursuant to the Trust Indenture Act at the times and in the manner provided pursuant to the Trust 

  

 13 

 
Indenture Act; provided that any such information, documents or reports required to be filed with the Commission pursuant to Section 13 or 15(d)
of the Exchange Act shall be filed with the Trustee within 15 days after the same is filed with the Commission. For purposes of this provision, any such information, document or report that the Company has filed with the Commission and that is
publicly accessible on the Commission’s EDGAR system (or any successor thereto) shall be deemed to be filed with the Trustee.” 
 ARTICLE EIGHT 
 AMENDMENTS 
 Section 8.1. Amendments. Supplemental indentures modifying the Indenture and the terms of the Notes may be entered into as set forth in Article IX of the Base Indenture, provided that the Base Indenture is hereby amended,
with respect to the Notes only, by replacing the text of Section 902(1)-(4) thereof with the following text: 
 “(1) Reduce the percentage in principal amount of affected Notes the consent of whose Holders is required for an amendment of the Indenture or for waiver of compliance with some provisions of the Indenture or for waiver of some
defaults under the Indenture; 
 (2) Reduce the rate of interest on any Note or change the time for payment of interest;

 (3) Reduce the principal amount of, or premium, if any, due on the Notes or change the Stated Maturity thereof; 

(4) Change the Place of Payment where, or the coin or currency in which, any Note or any premium or interest thereon is payable;

 (5) Change the provisions relating to waiver of defaults under the Indenture; 
 (6) Modify the provisions of the Indenture relating to the ranking of the Notes in a manner adverse to Holders; 
 (7) Modify the redemption provisions of the Indenture and the Notes in a manner adverse to Holders; 
 (8) Impair the right of Holders to institute suit for the enforcement of any payment on or after the Stated Maturity thereof (or, in the
case of redemption, on or after the Redemption Date); or 
 (9) Modify any of the provisions of this Section, Section 513
or Section 1008, except to increase any such percentage or to provide that certain other provisions of the Indenture cannot be modified or waived without the consent of the Holder of each Outstanding Security affected thereby; provided,
however, that this Clause shall not be deemed to require the consent of any Holder with respect to changes in the references to “the Trustee” and concomitant changes in this Section and Section 1008, or the deletion of this
proviso, in accordance with the requirements of Sections 611 and 901(7).” 
 ARTICLE NINE 
 MISCELLANEOUS 
 Section 9.1.
Execution as Supplemental Indenture. This Third Supplemental Indenture is executed and shall be construed as an indenture supplemental to the Base Indenture and, as provided in the Base Indenture, this Third Supplemental Indenture forms a
part thereof. 
  

 14 

 Section 9.2. Conflict with Trust Indenture Act. If any provision hereof limits, qualifies or
conflicts with another provision hereof, or with a provision of the Base Indenture, which is required to be included in this Third Supplemental Indenture, or in the Base Indenture, respectively, by any of the provisions of the Trust Indenture Act,
such required provision shall control to the extent it is applicable. 
 Section 9.3. Effect of Headings. The Article and Section
headings herein are for convenience only and shall not affect the construction hereof. 
 Section 9.4. Successors and Assigns.
All covenants and agreements by the Company and the Trustee in this Third Supplemental Indenture shall bind its successors and assigns, whether so expressed or not. 
 Section 9.5. Separability Clause. In case any provision in this Third Supplemental Indenture or in the Notes shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the
remaining provisions shall not in any way be affected or impaired thereby. 
 Section 9.6. Benefits of Third Supplemental
Indenture. Nothing in this Third Supplemental Indenture or in the Notes, express or implied, shall give to any Person, other than the parties hereto and their successors hereunder and the Holders, any benefit or any legal or equitable right,
remedy or claim under this Third Supplemental Indenture. 
 Section 9.7. Execution and Counterparts. This Third Supplemental
Indenture may be executed in any number of counterparts, each of which shall be deemed to be an original, but all such counterparts shall together constitute but one and the same instrument. 
 Section 9.8. Governing Law. This Third Supplemental Indenture and the Notes shall be governed by and construed in accordance with the laws of
the State of New York. 
  

 15 

 IN WITNESS WHEREOF, the parties hereto have caused this Third Supplemental Indenture to be duly executed
as of the day and year first above written. 
  

			
	CME GROUP INC.
		
	By:	 	 /s/ James E. Parisi

	Name:	 	James E. Parisi
	Title:	 	Managing Director and Chief Financial Officer
	
	U.S. BANK NATIONAL ASSOCIATION
		
	By:	 	 /s/ Grace A. Gorka

	Name:	 	Grace A. Gorka
	Title:	 	Vice President

 EXHIBIT A 
 [FORM OF FACE OF SECURITY] 
 [THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE
HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF. THIS SECURITY MAY NOT BE EXCHANGED IN WHOLE OR IN PART FOR A SECURITY REGISTERED, AND NO TRANSFER OF THIS SECURITY IN WHOLE OR IN PART MAY BE REGISTERED, IN
THE NAME OF ANY PERSON OTHER THAN SUCH DEPOSITARY OR A NOMINEE THEREOF, EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE.] 
 [UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), TO THE ISSUER 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 DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF DTC), 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.] 
 [Insert any legend required by the Internal Revenue Code and the regulations thereunder.] 
 CME Group Inc. 
 5.40% Notes due 2013 
  

					
	No.            	  		  	$            
			
		  	CUSIP No.             	  	

 CME Group Inc., a Delaware corporation (herein called the “Company,” which term
includes any successor Person under the Indenture hereinafter referred to), for value received, hereby promises to pay to _______, or registered assigns, the principal sum of Dollars on August 1, 2013, and to pay interest thereon from
August 12, 2008 or from the most recent Interest Payment Date to which interest has been paid or duly provided for, semi-annually on February 1 and August 1 in each year, commencing February 1, 2009, at the rate of 5.40% per
annum, until the principal hereof is paid or made available for payment, provided that any principal and premium, and any such installment of interest, which is overdue shall bear interest at the rate of 5.40% per annum (to the extent
that the payment of such interest shall be legally enforceable), from the dates such amounts are due until they are paid or made available for payment, and such interest shall be payable on demand. The interest so payable, and punctually paid or
duly provided for, on any Interest Payment Date will, as provided in such Indenture, be paid to the Person in whose name this Security is registered at the close of business on the Regular Record Date for such interest, which shall be the fifteenth
day (whether or not a Business Day), as the case may be, next preceding such Interest Payment Date. Any such interest not so punctually paid or duly provided for will forthwith cease to be payable to the Holder on such Regular Record Date and may
either be paid to the Person in whose name this Security is registered at the close of business on a Special Record Date for the payment of such Defaulted Interest to be fixed by the Trustee, notice whereof shall be given to Holders of Securities of
this series not less than 10 days prior to such Special 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 Securities of this series may be listed, and
upon such notice as may be required by such exchange, all as more fully provided in said Indenture. 
 Payment of the principal of (and
premium, if any) and any such interest on this Security will be made at the office or agency of the Company maintained for that purpose in New York, New York, in such coin or currency of the United States of America as at the time of payment is
legal tender for payment of public and private debts; provided, however, that at the option of the Company payment of interest may be made by check mailed to 

  

 A-F-1 

 
the address of the Person entitled thereto as such address shall appear in the Security Register; and provided, further, that if this Security
is a Global Security, payment may be made pursuant to the Applicable Procedures of the Depositary as permitted in the Indenture. 
 If any
Interest Payment Date, Repurchase Date, Stated Maturity or Maturity is not a Business Day, then payment of principal, premium, if any, or interest, as applicable, shall be made on the next succeeding Business Day with the same force and effect as if
made on such Interest Payment Date, Repurchase Date, Stated Maturity or Maturity. No interest shall accrue on the amount so payable for the period from the relevant Interest Payment Date, Repurchase Date, Stated Maturity or Maturity to the date on
which the payment is made. 
 Reference is hereby made to the further provisions of this Security 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
hereof has been executed by the Trustee referred to on the reverse hereof by manual signature, this Security shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose. 
  

 A-F-2 

 IN WITNESS WHEREOF, the Company has caused this instrument
to be duly executed. 
  

			
	CME GROUP INC.
		
	By:	 	  

	Name:	 	
	Title:	 	

  

			
	Attest:
	
	  

	Name:	 	
	Title:	 	

 TRUSTEE’S CERTIFICATE OF AUTHENTICATION 
 This is one of the Securities of the series designated therein referred to in the within-mentioned Indenture. 
 Dated: 
  

			
	U.S. BANK NATIONAL ASSOCIATION,
	As Trustee
		
	 By
	 	  

	Authorized Signatory

 [FORM OF REVERSE OF SECURITY] 
 This Security is one of a duly authorized issue of securities of the Company (herein called the “Securities”), issued and to be issued
in one or more series under a Senior Debt Indenture, dated as of August 12, 2008 (the “Base Indenture”), as supplemented by the Third Supplemental Indenture, dated as of August 12, 2008 (the “Supplemental
Indenture” and, together with the Base Indenture, the “Indenture”), between the Company and U.S. Bank National Association, as Trustee (herein called the “Trustee,” which term includes any successor trustee
under the Indenture), and reference is hereby made to the Indenture for a statement of the respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Holders of the Securities and of the terms upon
which the Securities are, and are to be, authenticated and delivered. This Security is one of the series designated on the face hereof initially limited in aggregate principal amount to $750,000,000, provided that the Company may, without the
consent of any Holder, at any time and from time to time increase the initial principal amount. 
 The Securities of this series are subject
to redemption as provided in Sections 4.1 and 4.2 of the Supplemental Indenture and Article XI of the Base Indenture. 
 This Security will
not be subject to any sinking fund. 
 The Indenture contains provisions for defeasance at any time of the entire indebtedness of this
Security or certain restrictive covenants and Events of Default with respect to this Security, in each case upon compliance with certain conditions set forth in the Indenture. 
 If an Event of Default with respect to Securities of this series shall occur and be continuing, the principal of, and premium, if any, plus accrued and
unpaid interest on the Securities of this series may be declared due and payable in the manner and with the effect provided in the Indenture. 
 The Indenture permits, with certain exceptions as therein provided, the amendment thereof and the modification of the rights and obligations of the Company and the rights of the Holders of the Securities of each series to be affected under
the Indenture at any time by the Company and the Trustee with the consent of the Holders of a majority in principal amount of the Securities at the time Outstanding of each series to be affected. The Indenture also contains provisions permitting the
Holders of not less than a majority in principal amount of the Securities of each series at the time Outstanding, on behalf of the Holders of all Securities of such series, to waive compliance by the Company with certain provisions of the Indenture
and certain past defaults under the Indenture and their consequences. Any such consent or waiver by the Holder of this Security shall be conclusive and binding upon such Holder and upon all future Holders of this Security and of any Security issued
upon the registration of transfer hereof or in exchange herefor or in lieu hereof, whether or not notation of such consent or waiver is made upon this Security. 
 As provided in and subject to the provisions of the Indenture, the Holder of this Security shall not have the right to institute any proceeding with respect to the Indenture or for the appointment of a receiver or
trustee or for any other remedy thereunder, unless such Holder shall have previously given the Trustee written notice of a continuing Event of Default with respect to the Securities of this series, the Holders of not less than 25% in principal
amount of the Securities of this series at the time Outstanding shall have made written request to the Trustee to institute proceedings in respect of such Event of Default as Trustee and offered the Trustee reasonable indemnity, and the Trustee
shall not have received from the Holders of a majority in principal amount of Securities of this series at the time Outstanding a direction inconsistent with such request, and shall have failed to institute any such proceeding, for 60 days
after receipt of such notice, request and offer of indemnity. The foregoing shall not apply to any suit instituted by the Holder of this Security for the enforcement of any payment of principal hereof or any premium or interest hereon on or after
the respective due dates expressed herein. 
 No reference herein to the Indenture and no provision of this Security or of the Indenture
shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the principal of and any premium and interest on this Security at the times, place and rate, and in the coin or currency, herein prescribed. 

 

 A-R-1 

 As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this
Security is registrable in the Security Register, upon surrender of this Security for registration of transfer at the office or agency of the Company in any place where the principal of and any premium and interest on this Security are payable, duly
endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Company and the Security Registrar duly executed by, the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new Securities
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. 
 The Securities of this series are issuable only in registered form without coupons in minimum denominations of $2,000 and integral multiples of $1,000 in excess thereof. As provided in the Indenture and subject to
certain limitations therein set forth, Securities of this series are exchangeable for a like aggregate principal amount of Securities of this series and of like tenor of a different authorized denomination, as requested by the Holder surrendering
the same. 
 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 Security 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 Security is registered as the owner hereof for all purposes, whether or not this Security be overdue, and neither
the Company, the Trustee nor any such agent shall be affected by notice to the contrary. 
 This Security and all the obligations of the
Company hereunder are direct, senior unsecured and unsubordinated obligations of the Company and rank pari passu with all other senior unsecured and unsubordinated indebtedness of the Company from time to time outstanding. 
 THE SECURITIES OF THIS SERIES SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK. 
 All terms used in this Security which are defined in the Indenture shall have the meanings assigned to them in the Indenture. 
  

 A-R-2Exhibit 4.2 

RESTRICTED STOCK UNIT
AGREEMENT

     AGREEMENT
made this __th day of ____, 2008, between ENTERPRISE FINANCIAL SERVICES CORP, a
Delaware corporation (the "Company"), and __________________________
("Employee").

     1. AWARD.

     (a) UNITS. The Company hereby awards
and issues to Employee _____ restricted stock units (the "Units"). Each Unit
represents the right to receive one share of Restricted Stock under the
Company's 2002 Stock Incentive Plan (as amended from time to time, the "Plan")
subject to the terms of the Plan (including, without limitation, adjustment of
the ratio of converting Units into Restricted Stock provided for in the Plan)
and to the vesting requirements set forth herein.

     (b) ISSUANCE OF UNITS. The Units
shall be evidenced by this Agreement and deemed issued upon acceptance hereof by
Employee.

     (c) PLAN INCORPORATED. The terms and
conditions of the Plan are incorporated herein by reference. Employee
acknowledges receipt of a copy of the Plan (as amended and restated to the date
hereof) and agrees that this award of Units shall be subject to all of the terms
and conditions set forth in the Plan, including future amendments thereto, if
any, provided, however, that no such future amendment shall have an effect upon
the vesting requirements set forth herein or impose additional vesting
requirements or extend restrictions on Restricted Stock beyond the time of
vesting. Capitalized terms not otherwise defined herein shall have the meaning
set forth in the Plan.

     2. VESTING.

     (a) Vesting
of the Units shall be based upon periods of service subsequent to the date of
award and not on other Qualifying Performance Criteria. Units shall vest in
accordance with the following schedule provided that Employee is employed by the
Company on the Vesting Date:

	  				Cumulative 
	  		Percentage
      of 		Vesting
    
	Vesting Date  	     	Units Vesting 	     	Percentage 
	December 15, 20__ - 	 	 20% 	 	  20% 
	December 15, 20__
      - 	 	 20% 		 
      40% 
	December 15, 20__ - 		 20% 		  60% 
	December 15, 20__
      - 		 20% 		 
      80% 
	December 15, 20__ - 		 20% 		100% 

As of each such vesting date, the Units
shall be converted into shares of Restricted Stock under the Plan and the
Company shall issue such shares to Employee by means of book entry and shall,
upon request of the Employee, issue a certificate representing such shares and
Employee shall have all rights of a shareholder of record with respect to such
shares from and after such date. Employee shall have neither the right to vote
nor the right to receive cash dividends or distributions nor any other rights as
a shareholder with respect to the Units prior to the date of vesting.

 

1 

Exhibit 4.2 

     (b) Vesting
of the Units shall occur upon death, Disability or Retirement (as defined below)
as follows: 

	      	 	      	i.		In the event of the
      death of an Employee while continuing to be employed by the Company, all
      Units not otherwise vested shall become immediately vested and
      exercisable.
		 		ii.	   	In the event of the
      Disability or Retirement of an Employee, all Units shall continue to vest,
      as though Employee had remained employed with the Company following such
      Disability or Retirement, subject to the forfeiture provisions of
      Subparagraph (d) below.
		 
		(c)
      As used herein,
		 
		 		i.		"Retirement" means the
      termination of employment, other than for reasons that constitute
      deliberate gross misconduct, determined in the sole discretion of the
      Committee, after the time that the Employee has attained 60 years of age
      and the sum of his attained age and his continuous full years of full time
      employment service with the Company is 70 (e.g., having attained the age
      of 60 with 10 years of employment with the Company or age 65 with 5 years
      of employment with the Company would qualify the employee for Retirement).
      For these purposes, an employee will be deemed to have a year of full time
      employment service with the Company if the employee would be entitled to
      receive credit for a year of service under a qualified pension plan in
      accordance with Internal Revenue Service Code §1053(b)(2)(c).
		 		ii.		"Disability" shall
      mean qualification for disability benefits under the Social Security
      disability insurance program, or if an employee is determined to be
      permanently disabled by the Committee in its
  discretion.

     (d) Notwithstanding the
provisions of Subparagraph (b) ii. above, the Employee will forfeit all unvested
Units and vesting of Units shall immediately terminate in the event of the
determination of the Committee, made in its sole discretion, that any of the
following has occurred: 

		 		i.		The Employee violates
      any provisions of this Agreement or any other agreement between the
      Company and the Employee;
	      	 	      	ii.		The Employee directly
      or indirectly, owns equity or stock in, manages, operates, is employed by
      or is connected with as an officer, employee, partner, consultant or
      otherwise, or otherwise engages or participates in any entity or business
      engaged in the operation, ownership or management of a bank, trust
      company, wealth management or financial services business within the
      Metropolitan Statistical Areas of St. Louis, Kansas City, Phoenix or any
      other city in which the Company or any of its direct or indirect
      affiliates or subsidiaries has an office at the time of such termination
      (a “Competitive Activity”). Notwithstanding the foregoing, the ownership
      by Employee of less than 1% of any class of the outstanding capital stock
      of any corporation conducting such a competitive business which is
      regularly traded on a national securities exchange or in the
      over-the-counter market shall not be a violation of the foregoing
      covenant.
		 		iii.		The Employee
      utilizes or discloses any confidential or proprietary information
      concerning the Company or any of its customers;
		 		iv.	   	The Employee, directly
      or indirectly, whether alone or in association, or combination with any
      other Person, or as an officer, director, shareholder, member, manager,
      employee, agent, independent contractor, consultant, advisor,
      joint-venturer, partner or otherwise, and whether or not for pecuniary
      benefit (i) solicits, takes away, attempts to take away, diverts, or
      attempt to diverts any customer from the Company or its Affiliates or (ii)
      induces, attempts to induce or aids any person in inducing any customer to
      cease doing business with the Company or any of its Affiliates or in any
      way interfere with the relationship between any customer and the Company
      or its Affiliates.

2 

Exhibit 4.2 

		 		v.		Employee is employed
      by or acts as a consultant for any person which directly, or through any
      of its Affiliates, solicits, takes away, attempts to take away, diverts,
      or attempts to divert any customer from the Company or any of its
      Affiliates.
	      	 	      	vi.		Employee (i) directly
      or indirectly, entices or induces, or attempts to, entice or induce, or
      directly or indirectly assists any Person in which Employee is an
      investor, consultant or employee to entice or induce, any employee of the
      Company or its Affiliates to leave such employ or (ii) directly or
      indirectly, and shall not be employed or act as a consultant for any
      Person who employs any employee of the Company or its Affiliates in any
      business that engages in any Competitive Activity.
		 		vii.	   	The Employee makes any
      disparaging comments concerning the Company or any of its officers or
      directors, or engages in any other activity or conduct which is
      detrimental to the interests of the Company, as determined by the
      Committee in its sole discretion.

For purposes of this Subparagraph (d)
(including Subparagraphs i through vii) "Company" means the Company and each of
its direct or indirect majority owned subsidiaries and affiliates. 

     3. WITHHOLDING OF TAX. To the extent that
the vesting of Units or receipt of shares of Restricted Stock results in income
to Employee for federal, state or local income tax purposes, Employee shall pay
to the Company, or make arrangements satisfactory to the Committee regarding
payment of, any federal, state or local taxes of any kind required by law to be
withheld with respect to such income. The Company shall, to the extent permitted
by law, have the right to deduct any such taxes from any payment of any kind
otherwise due to the Employee, including the right but not the obligation to
effect such withholding by offset against the shares of Restricted Stock
deliverable in respect of vested Units.

     4. SALE OR TRANSFER OF UNITS OR STOCK.
Employee agrees that the Units may not be sold, transferred or otherwise
disposed of in any manner prior to vesting. Employee also understands that
although the issuance of grants and awards under the Plan has been registered
under the Securities Act of 1933, such registration does not apply to any resale
or transfer by Employee of the shares of stock resulting from vesting of units
under this award and the Plan. Employee also agrees (i) that the certificates
representing the Restricted Stock may bear such legend or legends as the
Committee deems appropriate in order to assure compliance with applicable
securities laws, (ii) that the Company may refuse to register the transfer of
the Restricted Stock on the stock transfer records of the Company if such
proposed transfer would in the opinion of counsel satisfactory to the Company
constitute a violation of any applicable securities law, and (iii) that the
Company may give related instructions to its transfer agent to stop registration
of the transfer of the Restricted Stock.

     5. EMPLOYMENT RELATIONSHIP. For purposes
of this Agreement, including determination of vesting, Employee shall be
considered to be in the employment of the Company as long as Employee remains an
employee of either the Company, any successor corporation (including any parent
entity succeeding to the business of or control of the Company) or subsidiary
corporation (as defined in Section 424 of the Code) of the Company or any
successor corporation. Any question as to whether and when there has been a
termination of such employment, and the cause of such termination, shall be
determined by the Committee, and its determination shall be final and binding on
all persons, including Employee.

     6.
COMMITTEE'S POWERS. No provision contained in this Agreement shall in any way terminate,
modify or alter, or be construed or interpreted as terminating, modifying or
altering any of the powers, rights or authority vested in the Committee pursuant
to the terms of the Plan, including, without limitation, the Committee's rights
to make certain determinations and elections with respect to the Units and
Restricted Shares.

3 

Exhibit 4.2 

     7. CONFIDENTIALITY; NON SOLICITATION. In
consideration for the grant of Units, Employee agrees as follows:

     (a) For a period of six months
following any termination from the Company, (i) Employee, directly or
indirectly, whether alone or in association, or combination with any other
Person, or as an officer, director, shareholder, member, manager, employee,
agent, independent contractor, consultant, advisor, joint-venturer, partner or
otherwise, and whether or not for pecuniary benefit shall not (A) solicit, take
away, attempt to take away, divert, or attempt to divert any customer from the
Company or its Affiliates or (B) induce, attempt to induce or aid any person in
inducing any customer to cease doing business with the Company or any of its
Affiliates or in any way interfere with the relationship between any customer
and the Company or its Affiliates and (ii) Employee shall not be employed by or
act as a consultant for any person which directly, or through any of its
Affiliates, solicits, takes away, attempts to take away, diverts, or attempts to
divert any customer from the Company or any of its Affiliates.

     (b) For a period of six months
following any termination from the Company, Employee shall not (i) directly or
indirectly, entice or induce, or attempt to, entice or induce, or directly or
indirectly assist any Person in which Employee is an investor, consultant or
employee to entice or induce, any employee of the Company or its Affiliates to
leave such employ or (ii) directly or indirectly, and shall not be employed or
act as a consultant for any Person who employs any employee of the Company or
its Affiliates in any business that engages in any Competitive Activity.

     (c) Employee
shall always refrain from any direct or indirect use or disclosure (whether
intentional, negligent or reckless) of any trade secret or confidential or
proprietary information of the Company to any person or business, without regard
to the nature of Employee’s termination from the Company. 

Employee acknowledges that any violation
of paragraphs (a) through (d) above will cause the Company severe, immediate and
irreparable harm entitling the Company to injunctive relief in addition to any
other remedies that may be available at law or in equity. As used herein, the
term “Company” shall include the Company, its successors, subsidiaries and
affiliates. The provisions of paragraphs (a) through (d) above shall be in
addition to any other noncompetition, nonsolicitation or confidentiality
agreements to which Employee is subject and not supersede or override any such
other agreements. The provisions of paragraphs (a) through (c) above shall
terminate prospectively after any Change of Control as defined in the Plan.

     8. BINDING EFFECT. This Agreement shall
be binding upon and inure to the benefit of the Company, its subsidiaries and
any of their respective successors, and all persons lawfully claiming under
Employee.

     9. GOVERNING LAW. This Agreement shall be
governed by, and construed in accordance with, the laws of the State of
Missouri.

[The remainder of this page is blank.
The next page is the signature page.] 

4 

Exhibit 4.2 

     IN WITNESS
WHEREOF, the Company has caused this Agreement to be duly executed by an officer
thereunto duly authorized, and Employee has executed this Agreement, all
effective as of the date first above written.

	ENTERPRISE
      FINANCIAL SERVICES CORP 
	 
	 
	By: 
    	 	 
	Name: 	 
	Title: 	 	 
	  
	  
	  
	 
	EMPLOYEE  

5

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