Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

James River Group Holdings, Inc.

CIK 0001620459JRVR· quarter ending 2026-06-30

Shares outstanding

46,239,030

as of 2026-08-05 · 10-Q cover page, filed 2026-08-10

Held by 13F filers

32,846,486

71.0% of shares outstanding

Holders

113

-2 vs 2026-03-31 · 20 new, 22 exited

Value

$144.7M

shares +5.1% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-10, as of 2026-08-05)

Class	Listed	Shares outstanding	Held by 13F filers	% of class	Holders	CUSIP
Common stock	JRVR · NASDAQ	46,239,030	32,846,486	71.0%	113	46990A102

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine

Count	CUSIP	Class (as filers write it)	Holders	Shares held	Class shares	% of class	Value	Options	Mapped via
	46990A102	COM SHS	113	32,846,486	46,239,030	71.0%	$144.7M	1 call / 2 put	13DG	holders →
	G5005R107	COMnot common	3	8,450,141	—	—	$37.1M	—	13DG	holders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings.

Top holders (113 of 113 · 46990A102)

change vs 2026-03-31

#	Filer	Shares	% of class	Value	Change
1	Zimmer Partners, LP	4,623,685	10.00%	$20.3M	+32,047 (+0.7%)
2	T. Rowe Price Investment Management, Inc.	4,605,838	9.96%	$20.3M	+111,187 (+2.5%)
3	BlackRock, Inc.	3,394,851	7.34%	$14.9M	+254,009 (+8.1%)
4	CONTINENTAL GENERAL INSURANCE CO	2,607,587	5.64%	$11.5M	+87,345 (+3.5%)
5	DONALD SMITH & CO., INC.	2,440,347	5.28%	$10.7M	+619,378 (+34.0%)
6	VANGUARD CAPITAL MANAGEMENT LLC	1,724,161	3.73%	$7.6M	-1,858 (-0.1%)
7	RBF Capital, LLC	1,221,980	2.64%	$5.4M	+93,455 (+8.3%)
8	GEODE CAPITAL MANAGEMENT, LLC	1,105,485	2.39%	$4.9M	+93,910 (+9.3%)
9	DISCOVERY CAPITAL MANAGEMENT, LLC / CT	1,059,155	2.29%	$4.7M	+239,800 (+29.3%)
10	Boston Partners	1,038,717	2.25%	$4.6M	+191,692 (+22.6%)
11	DIMENSIONAL FUND ADVISORS LP	1,001,405	2.17%	$4.4M	+156,162 (+18.5%)
12	STATE STREET CORP	827,859	1.79%	$3.6M	+2,184 (+0.3%)
13	MORGAN STANLEY	740,966	1.60%	$3.3M	+165,594 (+28.8%)
14	AQR CAPITAL MANAGEMENT LLC	508,019	1.10%	$2.2M	+163,996 (+47.7%)
15	KENNEDY CAPITAL MANAGEMENT LLC	492,253	1.06%	$2.2M	-9,281 (-1.9%)
16	PRICE T ROWE ASSOCIATES INC /MD/	376,537	0.81%	$1.7M	+11,960 (+3.3%)
17	AMERICAN CENTURY COMPANIES INC	376,187	0.81%	$1.7M	+215,729 (+134.4%)
18	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	360,226	0.78%	$1.6M	+6,303 (+1.8%)
19	NORTHERN TRUST CORP	347,097	0.75%	$1.5M	+25,734 (+8.0%)
20	FLAX POND CAPITAL, LLC	328,574	0.71%	$1.5M	+314,374 (+2213.9%)
21	JACOBS LEVY EQUITY MANAGEMENT, INC	324,394	0.70%	$1.4M	-25,347 (-7.2%)
22	VANGUARD PORTFOLIO MANAGEMENT LLC	309,701	0.67%	$1.4M	+31,903 (+11.5%)
23	VANGUARD FIDUCIARY TRUST CO	299,496	0.65%	$1.3M	+15,117 (+5.3%)
24	D. E. Shaw & Co., Inc.	282,249	0.61%	$1.2M	+98,069 (+53.2%)
25	GOLDMAN SACHS GROUP INC	226,485	0.49%	$997K	-48,702 (-17.7%)
26	Canal Insurance CO	164,071	0.35%	$722K	+134,071 (+446.9%)
27	Quantinno Capital Management LP	162,417	0.35%	$715K	+60,253 (+59.0%)
28	ArrowMark Colorado Holdings LLC	150,000	0.32%	$660K	NEW
29	Bank of New York Mellon Corp	127,659	0.28%	$562K	-17,542 (-12.1%)
30	Quinn Opportunity Partners LLC	115,768	0.25%	$509K	—
31	BRIDGEWAY CAPITAL MANAGEMENT, LLC	106,700	0.23%	$469K	+46,700 (+77.8%)
32	O'SHAUGHNESSY ASSET MANAGEMENT, LLC	88,440	0.19%	$389K	NEW
33	Public Sector Pension Investment Board	75,956	0.16%	$334K	—
34	Nuveen, LLC	70,673	0.15%	$311K	-18,813 (-21.0%)
35	Russell Investments Group, Ltd.	62,979	0.14%	$277K	+25,176 (+66.6%)
36	ALLIANCEBERNSTEIN L.P.	62,550	0.14%	$394K	+7,600 (+13.8%)
37	AMERIPRISE FINANCIAL INC	62,369	0.13%	$274K	—
38	TWO SIGMA INVESTMENTS, LP	54,565	0.12%	$240K	-309,634 (-85.0%)
39	RITHOLTZ WEALTH MANAGEMENT	50,194	0.11%	$221K	NEW
40	XTX Topco Ltd	46,772	0.10%	$206K	NEW
41	RHUMBLINE ADVISERS	45,970	0.10%	$202K	+300 (+0.7%)
42	SEI INVESTMENTS CO	44,957	0.10%	$198K	-38,443 (-46.1%)
43	UBS Group AG	38,381	0.08%	$169K	+3,406 (+9.7%)
44	Invesco Ltd.	36,784	0.08%	$162K	+14,761 (+67.0%)
45	DEUTSCHE BANK AG\	36,481	0.08%	$161K	+14,254 (+64.1%)
46	PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO	32,061	0.07%	$141K	—
47	Graham Capital Management, L.P.	31,754	0.07%	$140K	NEW
48	WELLS FARGO & COMPANY/MN	31,333	0.07%	$138K	+17,384 (+124.6%)
49	SmartHarvest Portfolios, LLC	27,161	0.06%	$120K	NEW
50	FRANKLIN RESOURCES INC	27,150	0.06%	$119K	—
51	BANK OF AMERICA CORP /DE/	27,003	0.06%	$119K	-9,687 (-26.4%)
52	Sowell Financial Services LLC	26,796	0.06%	$118K	+300 (+1.1%)
53	DRW Securities, LLC	23,700	0.05%	$104K	NEW
54	IEQ CAPITAL, LLC	22,654	0.05%	$100K	-9,709 (-30.0%)
55	WEALTH ENHANCEMENT ADVISORY SERVICES, LLC	20,165	0.04%	$92K	+1,929 (+10.6%)
56	Connor, Clark & Lunn Investment Management Ltd.	20,092	0.04%	$88K	+4,499 (+28.9%)
57	Vanguard Global Advisers, LLC	19,376	0.04%	$85K	—
58	FMR LLC	18,004	0.04%	$79K	+6,753 (+60.0%)
59	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	17,218	0.04%	$76K	-329 (-1.9%)
60	CITIGROUP INC	17,180	0.04%	$76K	+15,467 (+902.9%)
61	JPMORGAN CHASE & CO	16,211	0.04%	$72K	-101,684 (-86.2%)
62	PDT Partners, LLC	15,710	0.03%	$69K	NEW
63	Rockefeller Capital Management L.P.	15,611	0.03%	$69K	-5,478 (-26.0%)
64	NISA INVESTMENT ADVISORS, LLC	14,785	0.03%	$65K	+14,690 (+15463.2%)
65	MERCER GLOBAL ADVISORS INC /ADV	14,061	0.03%	$62K	+2,886 (+25.8%)
66	Jump Financial, LLC	13,638	0.03%	$60K	-15,623 (-53.4%)
67	Cetera Investment Advisers	13,181	0.03%	$58K	+2,379 (+22.0%)
68	GLENMEDE TRUST CO NA	12,588	0.03%	$55K	NEW
69	NEUBERGER BERMAN GROUP LLC	11,754	0.03%	$52K	NEW
70	Cerity Partners LLC	11,466	0.02%	$50K	-3,719 (-24.5%)
71	Vise Technologies, Inc.	11,329	0.02%	$50K	NEW
72	Atom Investors LP	11,094	0.02%	$49K	NEW
73	MANUFACTURERS LIFE INSURANCE COMPANY, THE	10,853	0.02%	$48K	+501 (+4.8%)
74	SUSQUEHANNA INTERNATIONAL GROUP, LLP	10,529	0.02%	$46K	-2,635 (-20.0%)
75	FNY Investment Advisers, LLC	9,373	0.02%	$41K	-46,684 (-83.3%)
76	NEW YORK STATE COMMON RETIREMENT FUND	8,912	0.02%	$39K	—
77	Police & Firemen's Retirement System of New Jersey	7,021	0.02%	$31K	—
78	State of Wyoming	6,998	0.02%	$31K	+4,721 (+207.3%)
79	Tower Research Capital LLC (TRC)	6,480	0.01%	$29K	+3,152 (+94.7%)
80	Versant Capital Management, Inc	6,179	0.01%	$27K	+3,940 (+176.0%)
81	BARCLAYS PLC	4,973	0.01%	$22K	-3,888 (-43.9%)
82	BNP PARIBAS FINANCIAL MARKETS	4,586	0.01%	$20K	-10,508 (-69.6%)
83	Ameritas Investment Partners, Inc.	3,680	0.01%	$16K	—
84	Legal & General Group Plc	3,473	0.01%	$15K	—
85	American Capital Advisory, LLC	2,600	0.01%	$11K	—
86	SIMPLEX TRADING, LLC	1,777	0.00%	$8K	NEW
87	Arax Advisory Partners	1,467	0.00%	$6K	+419 (+40.0%)
88	ROYAL BANK OF CANADA	1,271	0.00%	$6K	+1,244 (+4607.4%)
89	HARBOR CAPITAL ADVISORS, INC.	757	0.00%	$3K	—
90	Sterling Capital Management LLC	690	0.00%	$3K	-530 (-43.4%)
91	FIFTH THIRD BANCORP	537	0.00%	$2K	—
92	CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	515	0.00%	$2K	-1,480 (-74.2%)
93	LANARK FINANCIAL, INC.	501	0.00%	$2K	NEW
94	Allworth Financial LP	426	0.00%	$2K	+331 (+348.4%)
95	Allied Private Wealth LLC	400	0.00%	$2K	NEW
96	Clearstead Advisors, LLC	394	0.00%	$2K	NEW
97	Parallel Advisors, LLC	368	0.00%	$2K	-607 (-62.3%)
98	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	281	0.00%	$1K	—
99	GAMMA Investing LLC	254	0.00%	$1K	-1,648 (-86.6%)
100	ZIONS BANCORPORATION, NATIONAL ASSOCIATION /UT/	202	0.00%	$889	NEW
101	Essential Partners LLC	171	0.00%	$752	+123 (+256.3%)
102	EverSource Wealth Advisors, LLC	150	0.00%	$660	-2,272 (-93.8%)
103	Covestor Ltd	129	0.00%	$1K	NEW
104	Farther Finance Advisors, LLC	111	0.00%	$490	-1,273 (-92.0%)
105	Optiver Holding B.V.	92	0.00%	$405	-288 (-75.8%)
106	PNC Financial Services Group, Inc.	90	0.00%	$396	-794 (-89.8%)
107	IFP Advisors, Inc	65	0.00%	$286	—
108	ROTHSCHILD INVESTMENT LLC	62	0.00%	$273	+36 (+138.5%)
109	True Wealth Design, LLC	51	0.00%	$225	-255 (-83.3%)
110	INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC	19	0.00%	$83	—
111	Caitong International Asset Management Co., Ltd	16	0.00%	$70	NEW
112	SJS Investment Consulting Inc.	12	0.00%	$53	NEW
113	SBI Securities Co., Ltd.	6	0.00%	$26	-60 (-90.9%)

Exited since 2026-03-31 (22 filers; largest 22 shown)

Hillsdale Investment Management Inc.	−448,860
Bronte Capital Management Pty Ltd.	−338,961
SEGALL BRYANT & HAMILL, LLC	−308,246
Topline Capital Management, LLC	−164,194
RENAISSANCE TECHNOLOGIES LLC	−43,400
Bleakley Financial Group, LLC	−40,158
Engineers Gate Manager LP	−29,209
Creative Planning	−27,121
Odyssean, LLC	−26,648
MetLife Investment Management, LLC	−20,468
CWM, LLC	−18,177
Squarepoint Ops LLC	−12,972
M&T Bank Corp	−10,221
Schonfeld Strategic Advisors LLC	−10,157
PRUDENTIAL FINANCIAL INC	−10,065
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION OF COLORADO	−6,954
Cornerstone Planning Group LLC	−123
Physician Wealth Advisors, Inc.	−90
Basecamp Wealth Advisors LLC	−45
Root Financial Partners, LLC	−30
MAI Capital Management	−24
Sunbelt Securities, Inc.	−12

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting person	Form	Filed	Event	Shares	% of class
Anthony Michael Muscolino	SCHEDULE 13G/A	2026-08-13	2026-06-30	2,590,765	5.6%
Jennifer Gordon	SCHEDULE 13G/A	2026-08-13	2026-06-30	2,590,765	5.6%
Enstar Group Limited	SCHEDULE 13G/A	2026-08-13	2026-06-30	2,590,765	5.6%
Elk Insurance Holdings, LLC	SCHEDULE 13G/A	2026-08-13	2026-06-30	2,590,765	5.6%
DONALD SMITH & CO., INC.	SCHEDULE 13G	2026-08-11	2026-06-30	2,440,347	5.3%
DSCO Value Fund, L.P.	SCHEDULE 13G	2026-08-11	2026-06-30	2,440,347	5.3%
Stuart J. Zimmer	SCHEDULE 13D	2026-05-15	2026-05-14	4,623,685	10%
Zimmer Financial Services Group LLC	SCHEDULE 13D	2026-05-15	2026-05-14	4,623,685	10%
Zimmer Partners, LP	SCHEDULE 13D	2026-05-15	2026-05-14	4,623,685	10%
Zimmer Partners GP, LLC	SCHEDULE 13D	2026-05-15	2026-05-14	4,623,685	10%
Barclays PLC	SCHEDULE 13G/A	2026-05-14	2026-03-31	740,342	1.61%
The Vanguard Group	SCHEDULE 13G/A	2026-03-27	2026-03-13	0	0%
CONTINENTAL GENERAL INSURANCE CO	SCHEDULE 13G	2026-03-24	2026-03-17	2,424,813	5.3%
Continental General Holdings LLC	SCHEDULE 13G	2026-03-24	2026-03-17	2,424,813	5.3%
Gorzynski Michael	SCHEDULE 13G	2026-03-24	2026-03-17	2,424,813	5.3%
Continental Insurance Group, Ltd.	SCHEDULE 13G	2026-03-24	2026-03-17	2,424,813	5.3%
T. Rowe Price Investment Management, Inc.	SCHEDULE 13G/A	2025-08-14	2025-06-30	4,500,097	9.8%
Fuller & Thaler Asset Management, Inc.	SCHEDULE 13G/A	2025-05-14	2025-03-31	2,057,299.78	4.51%
BlackRock, Inc.	SCHEDULE 13G/A	2025-04-23	2025-03-31	2,863,911	6.3%
Kenmare Holdings Ltd.	SCHEDULE 13G	2024-12-26	2024-12-18	2,590,765	5.7%
Cavello Bay Reinsurance Limited	SCHEDULE 13G	2024-12-26	2024-12-18	2,590,765	5.7%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.