EX-10.3



 Exhibit 10.3 

Execution Version  

COLLATERAL TRUST JOINDER – ADDITIONAL GRANTOR 

Reference is made to the Collateral Trust Agreement, dated as of October 3, 2016 (as amended, supplemented, amended and restated or
otherwise modified and in effect from time to time, the “Collateral Trust Agreement”), among Vistra Operations Company LLC (f/k/a TEX Operations Company LLC, the “Company”), the other Grantors from time to time
party thereto, Railroad Commission of Texas, as First-Out Representative (as defined therein), Credit Suisse AG, Cayman Islands Branch (as successor agent to Deutsche Bank AG New York Branch), as Senior Credit
Agreement Agent (as defined therein), and Delaware Trust Company, as Collateral Trustee. Capitalized terms used but not otherwise defined herein have the meanings assigned to them in the Collateral Trust Agreement. This Collateral Trust Joinder is
being executed and delivered pursuant to Section 7.19 of the Collateral Trust Agreement. 
 1. Joinder.
Each of the undersigned entities (collectively, the “Additional Grantors” and each an “Additional Grantor”), hereby agree to become party as a Grantor under the Collateral Trust Agreement for all purposes thereof on
the terms set forth therein, and to be bound by the terms of the Collateral Trust Agreement as fully as if the undersigned had executed and delivered the Collateral Trust Agreement as of the date thereof. 

2. Security Documents. Each Additional Grantor has become party to all of the Security Documents that provide, for the benefit of all
of the Priority Lien Secured Parties liens and security interests in such assets of the Additional Grantor as are required pursuant to the Priority Lien Documents. 

2. Governing Law and Miscellaneous Provisions. The provisions of Article 7 of the Collateral Trust Agreement will apply with like
effect to this Collateral Trust Joinder. 

  
 C-1 








 IN WITNESS WHEREOF, the parties hereto have caused this Collateral Trust Joinder to be executed
by their respective officers or representatives as of June 14, 2018. 
  

					
	ANP Bellingham Energy Company, LLC	 	Dynegy Resources Generating Holdco, LLC	 	
	ANP Blackstone Energy Company, LLC	 	Dynegy South Bay, LLC	 	
	Calumet Energy Team, LLC	 	Dynegy Stuart, LLC	 	
	Casco Bay Energy Company, LLC	 	Dynegy Washington II, LLC	 	
	Coffeen and Western Railroad Company	 	Dynegy Zimmer, LLC	 	
	Coleto Creek Power, LLC	 	Ennis Power Company, LLC	 	
	Dynegy Administrative Services Company	 	EquiPower Resources Corp.	 	
	Dynegy Associates Northeast LP, Inc.	 	Havana Dock Enterprises, LLC	 	
	Dynegy Coal Generation, LLC	 	Hays Energy, LLC	 	
	Dynegy Coal Holdco, LLC	 	Hopewell Power Generation, LLC	 	
	Dynegy Coal Trading & Transportation, L.L.C.	 	Illinois Power Generating Company	 	
	Dynegy Commercial Asset Management, LLC	 	Illinois Power Marketing Company	 	
	Dynegy Conesville, LLC	 	Illinois Power Resources Generating, LLC	 	
	Dynegy Dicks Creek, LLC	 	Illinois Power Resources, LLC	 	
	Dynegy Energy Services (East), LLC	 	Illinova Corporation	 	
	Dynegy Energy Services, LLC	 	IPH, LLC	 	
	Dynegy Fayette II, LLC	 	Kincaid Generation, L.L.C.	 	
	Dynegy Gas Imports, LLC	 	Lake Road Generating Company, LLC	 	
	Dynegy Hanging Rock II, LLC	 	Liberty Electric Power, LLC	 	
	Dynegy Kendall Energy, LLC	 	Masspower, LLC	 	
	Dynegy Killen, LLC	 	Midlothian Energy, LLC	 	
	Dynegy Marketing and Trade, LLC	 	Milford Power Company, LLC	 	
	Dynegy Miami Fort, LLC	 	NEPCO Services Company	 	
	Dynegy Midwest Generation, LLC	 	Northeastern Power Company	 	
	Dynegy Morro Bay, LLC	 	Ontelaunee Power Operating Company, LLC	 	
	Dynegy Moss Landing, LLC	 	Pleasants Energy, LLC	 	
	Dynegy Northeast Generation GP, Inc.	 	Richland-Stryker Generation LLC	 	
	Dynegy Oakland, LLC	 	Sithe Energies, Inc.	 	
	Dynegy Operating Company	 	Sithe/Independence LLC	 	
	Dynegy Power Generation Inc.	 	T-Fuels, LLC	 	
	Dynegy Power Marketing, LLC	 	Wharton County Generation, LLC	 	
	Dynegy Power, LLC	 	Wise County Power Company, LLC	 	
	Dynegy Resource II, LLC	 	Wise-Fuels Pipeline, Inc.	 	

  

			
	By:	 	 /s/ Kristopher E. Moldovan

	Name:	 	Kristopher E. Moldovan
	Title:	 	Senior Vice President and Treasurer



  
 [Signature Page to
Joinder to Collateral Trust Agreement] 








 The Collateral Trustee hereby acknowledges receipt of this Collateral Trust Joinder and agrees to
act as Collateral Trustee with respect to the Collateral pledged by the new Grantors: 
  

			
	DELAWARE TRUST COMPANY, as Collateral Trustee
		
	By:	 	 /s/ Alan R. Halpern

	Name:	 	Alan R. Halpern
	Title:	 	Vice President



  
 [Signature Page to
Joinder to Collateral Trust Agreement]