Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
SUN VALLEY GOLD MASTER FUND, LTD
   2. Issuer Name and Ticker or Trading Symbol
VISTA GOLD CORP [VGZ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
INTERNATIONAL MANAGEMENT SERVICES LTD, 3RD FLR, HARBOUR CTRE, N CHURCH ST BOX61		 3. Date of Earliest Transaction (Month/Day/Year)
03/27/2018
(Street)

GRAND CAYMAN, E9 KY1-1102		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Shares 03/27/2018   S   1,374,592 D $ 0.755 5,341,015 I See Footnote (1)
Common Shares 03/27/2018   P   1,374,592 A $ 0.755 13,281,529 D (2)  

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
SUN VALLEY GOLD MASTER FUND, LTD
INTERNATIONAL MANAGEMENT SERVICES LTD
3RD FLR, HARBOUR CTRE, N CHURCH ST BOX61
GRAND CAYMAN, E9 KY1-1102		     X    
SUN VALLEY GOLD LLC
620 SUN VALLEY ROAD
P.O. BOX 2759
SUN VALLEY, ID 83353		     X    
Palmedo Peter F.
620 SUN VALLEY ROAD
P.O. BOX 2759
SUN VALLEY, ID 83353		     X    

Signatures

 Sun Valley Gold Master Fund, Ltd., By: Peter F. Palmedo /s/ Peter F. Palmedo   04/13/2018
**Signature of Reporting Person Date
 Sun Valley Gold LLC By: /s/ Peter F. Palmedo   04/13/2018
**Signature of Reporting Person Date
 /s/ Peter F. Palmedo   04/13/2018
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(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).
(1) The Common Shares are held in the accounts of advisory clients of Sun Valley Gold LLC and may be deemed to be beneficially owned by Sun Valley Gold LLC and Peter F. Palmedo, the managing member of Sun Valley Gold LLC. Peter F. Palmedo and Sun Valley Gold LLC are included in this Form 4 filing as reporting persons for the first time as a correction to previous Form 3 and Form 4 filings. Peter F. Palmedo and Sun Valley Gold LLC may be deemed to have been beneficial owners of securities of the Issuer as of the Form 3 filed by Sun Valley Gold Master Fund, Ltd. on July 31, 2012. This Form 4 filing serves to correct the Form 3 filing on July 31, 2012 as well as the Form 4 filings by Sun Valley Gold Master Fund, Ltd. on December 21, 2012, August 19, 2016, August 22, 2016 and August 24, 2016.
(2) The Common Shares are held by Sun Valley Gold Master Fund, Ltd. and may be deemed to be beneficially owned by Sun Valley Gold LLC, the investment manager of Sun Valley Gold Master Fund, Ltd., and Peter F. Palmedo, the managing member of Sun Valley Gold LLC.

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