FORM 4 [X] 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
                                                                                  
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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 * Hine Alastair 2. Issuer Name and Ticker or Trading Symbol GAIN Capital Holdings, Inc. [ GCAP ] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable)_____ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
Chief Operating Officer
(Last)         (First)         (Middle)
C/O GAIN CAPITAL HOLDINGS, INC., BEDMINSTER ONE, 135 US HWY. 202/206
3. Date of Earliest Transaction (MM/DD/YYYY)
7/31/2020
(Street)
BEDMINSTER, NJ 07921
(City)       (State)       (Zip)
4. 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 Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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 Stock (1) 7/31/2020    D(2)    20274  D $6.00  24180  D   
Common Stock (1) 7/31/2020    D(3)    20680  D $6.00  3500  D   
Common Stock (1) 7/31/2020    D(4)    3500  D $6.00  0  D   
Common Stock (1) 7/31/2020    A(5)    22935  A $6.00  22935  D   
Common Stock (1) 7/31/2020    D(6)    22935  D $6.00  0  D   

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. 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 7. Title and Amount of Securities Underlying Derivative Security
(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

Explanation of Responses:
(1)  On July 31, 2020, Gain Capital holdings, Inc. (the "Issuer") and StoneX Group Inc. (f/k/a INTL FCStone Inc.) completed the merger (the "Merger") contemplated by the Agreement and Plan of Merger among the parties thereto, dated as of February 26, 2020 (the "Merger Agreement").
(2)  Pursuant to the terms of the Merger Agreement, each share of Issuer common stock reported in Table I above was converted into the right to receive $6.00 in cash (the "Merger Consideration").
(3)  Disposed of pursuant to the terms of the Merger Agreement under which each restricted stock unit ("RSU") that is subject to time-based vesting was canceled in exchange for a cash payment representing a number of shares of common stock subject to such RSU, multiplied by the Merger Consideration.
(4)  Disposed of pursuant to the terms of the Merger Agreement under which each performance-based RSU ("PRSU") for which the performance period has ended was canceled in exchange for a cash payment representing a number of shares of common stock subject to such PRSU determined based on actual performance during the performance period, multiplied by the Merger Consideration.
(5)  On March 14, 2019, the reporting person received a compensatory grant of PRSUs for which vesting was dependent on the Issuer's performance. Pursuant to the Merger Agreement, such PRSUs for which the performance period has not ended were vested at target performance as of the Merger.
(6)  Disposed of pursuant to the terms of the Merger Agreement under which each PRSU for which the performance period has not ended was canceled in exchange for a cash payment representing a number of shares of common stock subject to such PRSU determined based on target performance, multiplied by the Merger Consideration.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Hine Alastair
C/O GAIN CAPITAL HOLDINGS, INC.
BEDMINSTER ONE, 135 US HWY. 202/206
BEDMINSTER, NJ 07921


Chief Operating Officer

Signatures
/s/ Alastair Hine 8/4/2020
**Signature of Reporting Person Date
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