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

SCHEDULE 13G	
(Rule 13d-102)	
 	
Information Statement Pursuant to Rules 13d-1 and 13d-2	
Under the Securities Exchange Act of 1934	
 	
(Amendment No.      )*	

James River Group Holdings, Ltd.	
  (Name of Issuer)	
 	
Common stock, par value $0.002 per share	
(Title of Class of Securities)	

G5005R107	
(CUSIP Number)	

December 12, 2014	
Date of Event Which Requires Filing of the Statement	
 
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
 
 	[_]	Rule 13d-1(b)	
 
 	[X]	Rule 13d-1(c)	
 
 	[_]	Rule 13d-1(d)	
 
*The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.
 
The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

 	
 
CUSIP NO. G5005R107	13G	Page 2 of 10 Pages	

1.	 
NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
 
Citadel Advisors LLC	 	
 
2.	 
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) [_]
(b) [_]	 	
 
3.	 
SEC USE ONLY

4.
 	 
CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware	 	

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH
 	 
5.	 
SOLE VOTING POWER
0	 	
 	 
6.	 
SHARED VOTING POWER
 
1,464,129 shares

7.	 
SOLE DISPOSITIVE POWER
0	 	 	 	 	 	
 	 
8.
 	 
SHARED DISPOSITIVE POWER
See Row 6 above	 	 	 	 	 	 	
 
9.	 
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
See Row 6 above	 	 	 	 	 	 	
 
10.	 
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
CERTAIN SHARES
[_]	 	 	 	 	 	 	
 
11.	 
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
 
5.1%1	 	 	 	 	 	 	
 
12.
 	 
TYPE OF REPORTING PERSON
IA; OO; HC	 	 	 	 	 	 	

 
_______________________
 	1	The percentages reported in this Schedule 13G are based upon 28,540,350 shares of common stock outstanding (according to the prospectus filed by the issuer with the Securities and Exchange Commission on December 12, 2014).	

 	
 
CUSIP NO. G5005R107	13G	Page 3 of 10 Pages	

1.	 
NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
 
Citadel Advisors Holdings II LP	 	
 
2.	 
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) [_]
(b) [_]	 	
 
3.	 
SEC USE ONLY

4.
 	 
CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware	 	

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH
 	 
5.	 
SOLE VOTING POWER
0	 	
 	 
6.	 
SHARED VOTING POWER
 
1,473,329 shares

7.	 
SOLE DISPOSITIVE POWER
0	 	 	 	 	 	
 	 
8.
 	 
SHARED DISPOSITIVE POWER
See Row 6 above	 	 	 	 	 	 	
 
9.	 
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
See Row 6 above	 	 	 	 	 	 	
 
10.	 
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
CERTAIN SHARES
[_]	 	 	 	 	 	 	
 
11.	 
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
 
5.2%	 	 	 	 	 	 	
 
12.
 	 
TYPE OF REPORTING PERSON
PN; HC	 	 	 	 	 	 	

 	

 	
 
CUSIP NO. G5005R107	13G	Page 4 of 10 Pages	

 
1.	 
NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
 
Citadel GP LLC	 	
 
2.	 
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) [_]
(b) [_]	 	
 
3.	 
SEC USE ONLY

4.
 	 
CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware	 	

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH
 	 
5.	 
SOLE VOTING POWER
0	 	
 	 
6.	 
SHARED VOTING POWER
 
1,473,329 shares

7.	 
SOLE DISPOSITIVE POWER
0	 	 	 	 	 	
 	 
8.
 	 
SHARED DISPOSITIVE POWER
See Row 6 above.	 	 	 	 	 	 	
 
9.	 
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
See Row 6 above.	 	 	 	 	 	 	
 
10.	 
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
CERTAIN SHARES
[_]	 	 	 	 	 	 	
 
11.	 
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
 
5.2%	 	 	 	 	 	 	
 
12.
 	 
TYPE OF REPORTING PERSON
OO; HC	 	 	 	 	 	 	

 	

 	
 
CUSIP NO. G5005R107	13G	Page 5 of 10 Pages	

1.	 
NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
 
Kenneth Griffin	 	
 
2.	 
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) [_]
(b) [_]	 	
 
3.	 
SEC USE ONLY

4.
 	 
CITIZENSHIP OR PLACE OF ORGANIZATION
U.S. Citizen	 	

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH
 	 
5.	 
SOLE VOTING POWER
0	 	
 	 
6.	 
SHARED VOTING POWER
 
1,473,329 shares

7.	 
SOLE DISPOSITIVE POWER
0	 	 	 	 	 	
 	 
8.
 	 
SHARED DISPOSITIVE POWER
See Row 6 above	 	 	 	 	 	 	
 
9.	 
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
See Row 6 above	 	 	 	 	 	 	
 
10.	 
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
CERTAIN SHARES
[_]	 	 	 	 	 	 	
 
11.	 
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
 
5.2%	 	 	 	 	 	 	
 
12.
 	 
TYPE OF REPORTING PERSON
IN; HC	 	 	 	 	 	 	

 

 	

 	
 
CUSIP NO. G5005R107	13G	Page 6 of 10 Pages	

 	Item 1(a)	Name of Issuer	
 
James River Group Holdings, Ltd.
 
 	Item 1(b)	Address of Issuer’s Principal Executive Offices	
 
32 Victoria Street, Hamilton, Bermuda HM 12
 
 	Item 2(a)	Name of Person Filing	
 
This Schedule 13G is being jointly filed by Citadel Advisors LLC (“Citadel Advisors”), Citadel Advisors Holdings II LP (“CAH2”), Citadel GP LLC (“CGP”) and Mr. Kenneth Griffin (collectively with Citadel Advisors, CAH2 and CGP, the “Reporting Persons”) with respect to shares of common stock of the above-named issuer owned by Citadel Global Equities Master Fund Ltd., a Cayman Islands limited company (“CG”), Surveyor Capital Ltd., a Cayman Islands limited company (“SC”), and Citadel Securities LLC, a Delaware limited liability company (“Citadel Securities”).
 
Citadel Advisors is the portfolio manager for CG and SEC. CAH2 is the managing member of Citadel Advisors. CALC III LP, a Delaware limited partnership (“CALC3”), is the non-member manager of Citadel Securities.  CGP is the general partner of CALC3 and CAH2. Mr. Griffin is the President and Chief Executive Officer of, and owns a controlling interest in, CGP.
 
The filing of this statement shall not be construed as an admission that any of the Reporting Persons is the beneficial owner of any securities covered by the statement other than the securities actually owned by such person (if any).
 
 	Item 2(b)	Address of Principal Business Office	
 
The address of the principal business office of each of the Reporting Persons is c/o Citadel LLC, 131 S. Dearborn Street, 32nd Floor, Chicago, Illinois 60603.
 
 	Item 2(c)	Citizenship	
 
Each of Citadel Advisors and CGP is organized as a limited liability company under the laws of the State of Delaware. CAH2 is organized as a limited partnership under the laws of the State of Delaware. Mr. Griffin is a U.S. citizen.
 
 	Item 2(d)	Title of Class of Securities	
 
Common stock, $0.002 par value
 
 	Item 2(e)	CUSIP Number	
 
G5005R107

 	

CUSIP NO. G5005R107	13G	Page 7 of 10 Pages	

 	Item 3	If this statement is filed pursuant to Rules 13d-1(b), or 13d-2(b) or (c), check whether the person filing is a:	
 
(a)	[__]	Broker or dealer registered under Section 15 of the Exchange Act;
 
(b)	[__]	Bank as defined in Section 3(a)(6) of the Exchange Act;
 
(c)	[__]	Insurance company as defined in Section 3(a)(19) of the Exchange Act;
 
(d)	[__]	Investment company registered under Section 8 of the Investment Company Act;
 
(e)	[__]	An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E);
 
(f)	[__]	An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F);
 
(g)	[__]	A parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G);
 
(h)	[__]	A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act;
 
(i)	[__]	A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act;
 
(j)	[__]	Group, in accordance with Rule 13d-1(b)(1)(ii)(J).
 
If filing as a non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J), please specify the type of institution: ____________.
 
 	Item 4	Ownership	
 
 	A.	Citadel Advisors LLC	
 
 	(a)	Citadel Advisors may be deemed to beneficially own 1,464,129 shares of Common Stock.	
 
 	(b)	The number of shares Citadel Advisors may be deemed to beneficially own constitutes approximately 5.1% of the Common Stock outstanding.	

 	

CUSIP NO. G5005R107	13G	Page 8 of 10 Pages	

 	(c)	Number of shares as to which such person has:	
 
 	(i)	sole power to vote or to direct the vote: 0	
 
 	(ii)	shared power to vote or to direct the vote: 1,464,129	
 
 	(iii)	sole power to dispose or to direct the disposition of: 0	
 
 	(iv)	shared power to dispose or to direct the disposition of: 1,464,129	
 
 	B.	Citadel Advisors Holding II LP	
 
 	(a)	CAH2 may be deemed to beneficially own 1,473,329 shares of Common Stock.	
 
 	(b)	The number of shares CAH2 may be deemed to beneficially own constitutes approximately 5.2% of the Common Stock outstanding.	
 
 	(c)	Number of shares as to which such person has:	
 
 	(i)	sole power to vote or to direct the vote: 0	
 
 	(ii)	shared power to vote or to direct the vote: 1,473,329	
 
 	(iii)	sole power to dispose or to direct the disposition of: 0	
 
 	(iv)	shared power to dispose or to direct the disposition of: 1,473,329	
 
 	C.	Citadel GP LLC and Kenneth Griffin	
 
 	(a)	CGP and Griffin may be deemed to beneficially own 1,473,329 shares of Common Stock.	
 
 	(b)	The number of shares CGP and Griffin may be deemed to beneficially own constitutes approximately 5.2% of the Common Stock outstanding.	
 
 	(c)	Number of shares as to which such person has:	
 
 	(i)	sole power to vote or to direct the vote: 0	
 
 	(ii)	shared power to vote or to direct the vote: 1,473,329	
 
 	(iii)	sole power to dispose or to direct the disposition of: 0	
 
 	(iv)	shared power to dispose or to direct the disposition of: 1,473,329	

 	

CUSIP NO. G5005R107	13G	Page 9 of 10 Pages	

 	Item 5	Ownership of Five Percent or Less of a Class	
 
 	 	If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than 5 percent of the class of securities, check the following [_].	
 
 	Item 6	Ownership of More than Five Percent on Behalf of Another Person	
 
 	 	Not Applicable	
 
 	Item 7	Identification and Classification of the Subsidiary which Acquired the Security Being Reported on by the Parent Holding Company	
 
 	 	See Item 2 above	
 
 	Item 8	Identification and Classification of Members of the Group	
 
 	 	Not Applicable	
 
 	Item 9	Notice of Dissolution of Group	
 
 	 	Not Applicable	
 
 	Item 10	Certification	
 
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

 	

CUSIP NO. G5005R107	13G	Page 10 of 10 Pages	

After reasonable inquiry and to the best of its knowledge and belief, the undersigned certify that the information set forth in this statement is true, complete and correct.
 
Dated this 18th day of December, 2014.

 
CITADEL ADVISORS LLC
 
By: 	        /s/ Mark Polemeni	
Mark Polemeni, Authorized Signatory
 	CITADEL ADVISORS HOLDINGS II LP
 
By:         	/s/ Mark Polemeni	
Mark Polemeni, Authorized Signatory
 	
CITADEL GP LLC
By: 	        /s/ Mark Polemeni	
Mark Polemeni, Authorized Signatory	KENNETH GRIFFIN
 
By:         	/s/ Mark Polemeni	
Mark Polemeni, attorney-in-fact*	

_______________
 
 	*	Mark Polemeni is signing on behalf of Kenneth Griffin as attorney-in-fact pursuant to a power of attorney previously filed with the Securities and Exchange Commission on January 18, 2013, and hereby incorporated by reference herein. The power of attorney was filed as an attachment to a filing by Citadel Advisors LLC on Schedule 13G for TiVo Inc.	

 	

EXHIBIT 99.1
 
JOINT FILING AGREEMENT
 
The undersigned hereby agree that the Statement on Schedule 13G filed herewith (and any amendments thereto), relating to the Common Stock of James River Group Holdings, Ltd., a limited company under the laws of Bermuda, is being filed jointly with the Securities and Exchange Commission pursuant to Rule 13d-1(c) under the Securities Exchange Act of 1934, as amended, on behalf of each of the undersigned.
 
This Agreement may be executed in counterparts and each of such counterparts taken together shall constitute one and the same instrument.
 
Dated this 18th day of December, 2014.
 
CITADEL ADVISORS LLC
 
By: 	        /s/ Mark Polemeni	
Mark Polemeni, Authorized Signatory
 	CITADEL ADVISORS HOLDINGS II LP
 
By:         	/s/ Mark Polemeni	
Mark Polemeni, Authorized Signatory
 	
CITADEL GP LLC
By: 	        /s/ Mark Polemeni	
Mark Polemeni, Authorized Signatory	KENNETH GRIFFIN
 
By:         	/s/ Mark Polemeni	
Mark Polemeni, attorney-in-fact*	

 
 
________________________________
 
 	*	Mark Polemeni is signing on behalf of Kenneth Griffin as attorney-in-fact pursuant to a power of attorney previously filed with the Securities and Exchange Commission on January 18, 2013, and hereby incorporated by reference herein. The power of attorney was filed as an attachment to a filing by Citadel Advisors LLC on Schedule 13G for TiVo Inc.