FORM 3
        	UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES
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                      	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	                      	

1. Name and Address of Reporting Person *

Titan Co-Investment-HI, L.P.	2. Date of Event Requiring Statement (MM/DD/YYYY)
5/8/2017 
	3. Issuer Name and Ticker or Trading Symbol

Vistra Energy Corp [VST]	
(Last)        (First)        (Middle)

BROOKFIELD PLACE, 250 VESEY ST	4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                            ___ X ___ 10% Owner
_____ Officer (give title below)          ___ X ___ Other (specify below)
/ Director by Deputization	
(Street)

NEW YORK, NY 10281       

(City)              (State)              (Zip)	5. If Amendment, Date Original Filed (MM/DD/YYYY)

	6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person	

Table I - Non-Derivative Securities Beneficially Owned	
1.Title of Security
(Instr. 4)	2. Amount of Securities Beneficially Owned
(Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)	4. Nature of Indirect Beneficial Ownership
(Instr. 5)	
Common Stock, par value $0.01 per share  	2591601  	D  	 	
Common Stock, par value $0.01 per share  	74744  	I  	See Footnote   (1)	

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)	
1. Title of Derivate Security
(Instr. 4)	2. Date Exercisable and Expiration Date
(MM/DD/YYYY)	3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)	6. Nature of Indirect Beneficial Ownership
(Instr. 5)	
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares				

Explanation of Responses:	
(1) 	Represents interest in Common Stock held by Longhorn Capital GS L.P.	

Remarks:
*** Cyrus Madon, a Senior Managing Partner of Brookfield Asset Management Inc., serves on the board of directors of the Issuer as a representative of affiliates of Brookfield Asset Management Private Institutional Capital Adviser (Canada), L.P., including the Reporting Person. The Reporting Person is a "director by deputization" solely for purposes of Section 16 of the Securities Exchange Act of 1934, as amended.	

Reporting Owners	
Reporting Owner Name / Address	Relationships	
	Director	10% Owner	Officer	Other	
Titan Co-Investment-HI, L.P.
BROOKFIELD PLACE
250 VESEY ST
NEW YORK, NY 10281		X		Director by Deputization	

Signatures		
TITAN CO-INVESTMENT-HI, L.P. By: Titan Co-Investment GP, LLC, its general partner /s/ Kristen Haase		5/8/2017	
** Signature of Reporting Person		Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.	
*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).	
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).	
Note:	File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.	
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.