Document:

First Amendment and Joinder to the Tax Receivable Agreement

 Exhibit 10.36 

EXECUTION VERSION 

FIRST AMENDMENT AND JOINDER, dated as of April 14, 2010 (this “Amendment”), to the TAX RECEIVABLE
AGREEMENT, dated as of July 13, 2007, by and among APO Corp., a Delaware corporation (“APO Corp.”), Apollo Principal Holdings II, L.P., a Delaware limited partnership (“Apollo Principal II”), Apollo
Principal Holdings IV, L.P., a Cayman Islands exempted limited partnership (“Apollo Principal IV”), Apollo Management Holdings, L.P., a Delaware limited partnership (“AMH”), and each of the other parties signatory
thereto identified as “Holders”. Capitalized terms used but not defined herein shall have the respective meanings given to them in the Agreement. 

RECITALS 

WHEREAS, APO Corp., on behalf of itself and the respective Partnerships it Controls, and Leon D. Black (“Black”),
Marc J. Rowan (“Rowan”), Joshua J. Harris (“Harris”, and together with Black and Rowan, the “Founders”), Black Family Partners, L.P., a Delaware limited partnership (“BFP” and
together with Black and any other member of Black’s Group that becomes a party hereto, the “Black Group”), MJR Foundation LLC, a New York limited liability company (“MJR Foundation” and together with Rowan and
any other member of Rowan’s Group that becomes a party hereto, the “Rowan Group”), and MJH Partners, L.P., a Delaware limited partnership (“MJH Partners” and together with Harris and any other member of
Harris’s Group that becomes a party hereto, the “Harris Group”) (the Black Group, the Rowan Group and the Harris Group are collectively referred to herein as the “Founders’ Groups”, and together with APO
Corp., on behalf of itself and the respective Partnerships it Controls, are referred to herein as the “Amending Parties”), wish to amend certain terms of the Agreement as described below; 

WHEREAS, MJH Partners has acquired an ownership interest in AP Professional and desires to become party to the Agreement in
accordance with the terms hereof; 
 WHEREAS, each of Apollo Principal Holdings VI, L.P., a Delaware limited partnership
(“Apollo Principal VI”), and Apollo Principal Holdings VIII, L.P., a Cayman Islands exempted limited partnership (“Apollo Principal VIII”), have become Subsidiaries of APO Corp. and Section 7.14 of the
Agreement requires APO Corp. to cause any Person in which it acquires a general partner interest, managing member interest or similar interest to execute and deliver a joinder to the Agreement and become a “Partnership” for all purposes of
the Agreement; 
 WHEREAS, APO Corp. is obligated, pursuant to the terms of the Agreement, to pay certain Tax Benefit
Payments (as defined in the Agreement) to certain members of the Founders’ Groups; 
 WHEREAS, in connection
herewith, an amendment (the “AMH LP Agreement Amendment”) is being made to the Second Amended and Restated Limited Partnership Agreement of AMH, dated as of July 13, 2007, by and among Apollo Management Holdings G.P., LLC and
the Limited Partners (as defined therein), to provide for (1) a special allocation in 2009 and 2010 (the “Special Allocation”) of the income that AMH allocates to its two limited partners, APO Corp. and AP Professional, such
that the income allocated to APO Corp. in 2009 in excess of $36,955,739 and in 2010 would be increased from 28.49% to 100% and the income allocated to AP Professional in 2009 in excess of $36,955,739 and 2010 would be decreased from
71.51% to 0%, (2) a special distribution (the “APO Special Distribution”) to APO Corp. 
  

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equal to the amount of the Special Allocation attributable to APO Corp., payable pursuant to the terms of the AMH LP Agreement Amendment and (3) a special distribution (the “AP
Special Distribution”, and together with the APO Special Distribution, the “Special Distributions”) to AP Professional to the extent of the book-up as described in Section 5.05(j) of the AMH LP Agreement Amendment;

 WHEREAS, after giving effect to the Special Allocation, APO Corp. would need to make accelerated Tax Benefit Payments
to each of the Holders, including certain members of the Founders’ Groups; 
 WHEREAS, in order for APO Corp. to
make the Tax Benefit Payments to the Holders, including certain members of the Founders’ Groups, AMH would make a partial payment of the APO Special Distribution to APO Corp.; 

WHEREAS, in connection with the entry into the AMH LP Agreement Amendment to give effect to the Special Allocation and the Special
Distributions, the Amending Parties desire for a portion of any Tax Benefits Payment payable to any members of the Founders’ Groups in respect of the 2010 Taxable Year to be partially deferred as set forth herein; 

NOW, THEREFORE, in consideration of the foregoing and the respective covenants and agreements set forth herein, and intending to
be legally bound hereby, the parties hereto agree as follows: 
 1.1 Amendments. 

(a) The Agreement is hereby amended by adding the following definition of “Group” immediately after the definition of
“Expert” in Section 1.01 of the Agreement: 
 “Group” shall have the meaning given to such term in the
Agreement Among Principals, dated as of July 13, 2007, by and among the Founders, BFP, MJR Foundation, AP Professional and BRH Holdings, L.P., as amended from time to time. 

(b) The Agreement is hereby amended by amending and restating the definition of “Holder” in Section 1.01 of the Agreement
to read in its entirety as follows: 
 “Holder” means each of the parties hereto other than APO Corp. and its
Subsidiaries. 
 (c) The Agreement is hereby amended by amending and restating Section 3.01(a) of the Agreement to read in
its entirety as follows: 
 “Payments. Within five (5) calendar days of a Tax Benefit Schedule becoming final
in accordance with Section 2.04(a), APO Corp. shall pay to the applicable Holder, for such Taxable Year, the Tax Benefit Payment determined pursuant to Section 3.01(b); provided, that, with respect to any Tax Benefit
Payment to be made to any member of the Founders’ Group in respect of the 2010 Taxable Year, (i) each such member agrees and acknowledges that 25% of any such Tax Benefit Payment payable to such member in respect of the 2010 Taxable Year
(such portion, a “Deferred Tax Benefit Payment”) shall be payable by APO Corp. to the 
  

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applicable member of the Founders’ Group on the fourth anniversary of the date on which the Tax Benefit Schedule in respect of the 2010 Taxable Year became final in accordance with
Section 2.04(a). Each such Tax Benefit Payment shall be made by wire transfer of immediately available funds to a bank account of the applicable Holder previously designated by such Holder or as otherwise agreed by APO Corp. and the applicable
Holder. For the avoidance of doubt, no Tax Benefit Payment shall be made in respect of estimated tax payments, including, without limitation, federal income tax estimated payments.” 

1.2 Joinder to the Agreement. 

(a) MJH Partners hereby agrees that upon execution of this Amendment, it shall become a party to the Agreement and shall be fully bound
by, and subject to, all of the covenants, terms and conditions of the Agreement as though an original party thereto and shall be deemed a “Holder” for all purposes thereof 

(b) Pursuant to Section 7.14 of the Agreement, each of Apollo Principal VI and Apollo Principal Holdings VIII hereby agrees that
upon execution of this Amendment, it shall become a party to the Agreement and shall be fully bound by, and subject to, all of the covenants, terms and conditions of the Agreement as though an original party thereto and shall be deemed a
“Partnership” for all purposes thereof. 
 1.3 No Other Amendments or Waivers; Integration. 

Except as expressly amended by this Amendment, the Agreement shall remain in full force and effect, enforceable in accordance with its
terms. Except as specifically set forth herein, this Amendment is not a consent to any waiver or modification of any other term or condition of the Agreement or any of the instruments or documents referred to in the Agreement and shall not prejudice
any rights that the parties thereto may now or hereafter have under or in connection with the Agreement or any of the instruments or documents referred to therein. Except as specifically set forth herein, this Amendment shall be interpreted in a
manner consistent with the terms of the Agreement. 
 1.4 Governing Law. 

This Amendment shall be governed by, and construed in accordance with, the laws of the State of New York. 

1.5 Counterparts and Facsimile Execution. 

This Amendment may be executed in one or more counterparts, all of which shall be considered one and the same agreement and shall become
effective when one or more counterparts have been signed by each of the parties and delivered to the other parties, it being understood that all parties need not sign the same counterpart. Delivery of an executed signature page to this Amendment by
facsimile transmission shall be as effective as delivery of a manually signed counterpart of this Amendment. 
 [Signatures on
following pages] 
  

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 IN WITNESS WHEREOF, the undersigned have duly executed this Amendment as of the date
first written above. 
  

			
	APO CORP.
		
	By:	 	 /s/ John J. Suydam*

		 	John J. Suydam
		 	Vice President and Secretary
	
	APOLLO PRINCIPAL HOLDINGS VI, L.P.
		
	By:	 	Apollo Principal Holdings VI GP, LLC,
		 	its General Partner
		
	By:	 	 /s/ John J. Suydam*

		 	John J. Suydam
		 	Vice President
	
	APOLLO PRINCIPAL HOLDINGS VIII, L.P.
		
	By:	 	Apollo Principal Holdings VIII GP, Ltd.,
		 	its General Partner
		
	By:	 	 /s/ John J. Suydam*

		 	John J. Suydam
		 	Vice President

  

 

	*	The undersigned executes this Amendment on behalf of each of the entities listed above with an asterisk following his name, solely in his capacity as an officer of such
entities. 

  

	
	 /s/ John J. Suydam

	John J. Suydam

 [First Amendment to
the Tax Receivable Agreement] 

			
	HOLDERS:
	
	 /s/ Leon D. Black

	Leon D. Black
	
	 /s/ Marc J. Rowan

	Marc J. Rowan
	
	 /s/ Joshua J. Harris

	Joshua J. Harris
	
	BLACK FAMILY PARTNERS, L.P.
		
	By:	 	Black Family GP, LLC,
		 	its General Partner
		
	By	 	 /s/ Leon D. Black

		 	Leon D. Black
		 	Manager
	
	MJR FOUNDATION LLC
		
	By:	 	 /s/ Marc J. Rowan

		 	Marc J. Rowan
		 	Manager
	
	MJH PARTNERS, L.P.
		
	By:	 	MJH Family, LLC
		 	its General Partner
		
	By:	 	 /s/ Joshua J. Harris

		 	Joshua J. Harris
		 	Member

 [First Amendment to the
Tax Receivable Agreement]First Supplemental Indenture

 Exhibit 4.1 

FIRST SUPPLEMENTAL INDENTURE 

Dated as of October 1, 2010 

THIS FIRST SUPPLEMENTAL INDENTURE to the Indenture referred to below is dated as of October 1, 2010 (herein sometimes called
“this Supplemental Indenture”) between AMEREN ILLINOIS COMPANY (formerly named Central Illinois Public Service Company), an Illinois corporation (herein sometimes called the “Company” and sometimes called “CIPS” before
the Merger, as defined below), and THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., (formerly The Bank of New York Trust Company, N.A.), (the “Trustee”). 

Central Illinois Light Company (“CILCO”) and the Trustee executed an Indenture, dated as of June 1, 2006 (the
“Original Indenture” and as supplemented and amended, the “Indenture”), providing, among other things, for the issuance from time to time of CILCO’s Notes. 

$54,000,000 aggregate principal amount of CILCO’s 6.20% Senior Secured Notes due 2016 and $42,000,000 aggregate principal amount of
CILCO’s 6.70% Senior Secured Notes due 2036 were authenticated and delivered pursuant to the Company Order dated June 14, 2006 and remain outstanding as of the date hereof. 

$150,000,000 aggregate principal amount of CILCO’s 8.875% Senior Notes due 2013 were authenticated and delivered pursuant to the
Company Order dated December 9, 2008 and remain outstanding as of the date hereof. 
 As of the date hereof, pursuant to
the Agreement and Plan of Merger dated as of April 13, 2010 among CIPS, CILCO and Illinois Power Company (“IP”), CILCO and IP were merged into the Company (herein sometimes called the “Merger”) whereby the Company is the
surviving corporation. 
 The Company, as required by Section 12.01 of the Indenture, (a) is a corporation organized
and existing under the laws of a state of the United States of America, i.e. Illinois, (b) hereby expressly assumes the due and punctual payment of the principal of and premium and interest on all of the Notes and the performance of every
covenant of the Indenture on the part of CILCO to be performed or observed, (c) has expressly assumed, by an indenture supplemental to the First Mortgage, executed and delivered to the Mortgage Trustee, the due and punctual payment of the
principal of and premium and interest on all of the Senior Note First Mortgage Bonds and the performance of every covenant of the First Mortgage on the part of CILCO to be performed or observed, and (d) has delivered to the Trustee an
Officers’ Certificate and an Opinion of Counsel each stating that the Merger and this Supplemental Indenture comply with Article XII of the Indenture and that all conditions precedent therein provided for have been complied with. 

Pursuant to Section 13.01 of the Indenture, the Company, when authorized by Board Resolution, and the Trustee may enter into an
indenture supplemental to the Indenture for one or more of the purposes set forth in such Section 13.01 without the consent of the Holders of any of the Notes at the time outstanding, including to evidence the succession of the Company to CILCO
as permitted under the Indenture and the assumption by the Company of the covenants of CILCO in the Indenture and in the Notes. 

The Company has directed the Trustee to execute and deliver this Supplemental Indenture in accordance with the terms of the Indenture.

 All things necessary to make this Supplemental Indenture the legal, valid and binding obligation of the Company have been
done. 

 In consideration of the foregoing premises, the parties mutually agree as follows for the
benefit of each other and for the equal and ratable benefit of the Holders of the Notes: 
 ARTICLE I 

DEFINITIONS 

Section 1.1 Definitions. Except as otherwise defined herein, capitalized terms defined in the Indenture are used herein
as therein defined. 
 ARTICLE II 

AMENDMENTS TO INDENTURE 

Section 2.1 Assumption by Company. As of the date hereof, pursuant to Sections 12.01 and 13.01(a)(4) of the Indenture,
the Company hereby expressly assumes the due and punctual payment of the principal of and premium and interest on all of the Notes and the performance of every covenant of the Indenture on the part of CILCO to be performed or observed. 

Section 2.2 Company Substituted. On and after the date hereof, pursuant to Sections 12.02 and 13.01(a)(4) of the
Indenture, the Company shall succeed to, and be substituted for and may exercise every right and power of, CILCO under the Indenture with the same effect as if the Company had been named as the Company in the Indenture. 

Section 2.3 Receipt by Trustee. In accordance with Section 13.05 of the Indenture, the parties acknowledge that the
Trustee has received an Officers’ Certificate and an Opinion of Counsel as conclusive evidence that this Supplemental Indenture complies with the requirements of Article XIII of the Indenture. 

ARTICLE III 

MISCELLANEOUS 

Section 3.1 Parties. Nothing expressed or mentioned herein is intended or shall be construed to give any Person, other
than the Holders and the Trustee, any legal or equitable right, remedy or claim under or in respect of this Supplemental Indenture or the Indenture or any provision herein or therein contained. 

Section 3.2 Governing Law. This Supplemental Indenture shall be governed by and deemed to be a contract under, and
construed in accordance with, the laws of the State of New York, and for all purposes shall be construed in accordance with the laws of said State without regard to conflicts of law principles thereof. 

Section 3.3 Ratification of Indenture; This Supplemental Indenture Part of Indenture. Except as expressly
supplemented hereby, the Indenture is in all respects ratified and confirmed and all the terms, conditions, and provisions thereof shall remain in full force and effect. This Supplemental Indenture shall form a part of the Indenture for all
purposes, and every Holder of Notes heretofore or hereafter authenticated and delivered shall be bound hereby. The Trustee makes no representation or warranty as to the validity or sufficiency of this Supplemental Indenture. 

Section 3.4 Multiple Originals. The parties may sign any number of copies of this Supplemental Indenture. Each signed
copy shall be an original, but all of them shall represent the same agreement. 
 Section 3.5 Headings. The
headings of the Articles and Sections of this Supplemental Indenture have been inserted for convenience of reference only, are not intended to be considered a part hereof and shall not modify or restrict any of the terms or provisions hereof.

 Section 3.6 Trustee. The Trustee makes no representations as to the validity or sufficiency of this
Supplemental Indenture. The recitals and statements herein are deemed to be those of the Company and not of the Trustee. 
  

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

			
	Ameren Illinois Company
		
	By:	 	 /s/ Jerre E. Birdsong

		 	Name: Jerre E. Birdsong
		 	Title:  Vice President and Treasurer
	
	 The Bank of New York Mellon Trust Company, N.A.,
as
Trustee

		
	By:	 	 /s/ Mary E. Marler

		 	Name: Mary E. Marler
		 	Title:   Vice President

  

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