FRONTIER CAPITAL MANAGEMENT CO LLC

Position in WRB — Berkley W R Corp

CIK 351173 Boston, MA

Position in WRB

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$9,241,089

-$880,101 QoQ

Shares Held

139,425

-3.4% QoQ

Ownership

0.037%

of shares outstanding

% of Portfolio

0.09%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 76% Shared 0% None 24%

Financial Services · as of Mar 31, 2026

FRONTIER CAPITAL MANAGEMENT CO LLC holds $118,404,888 across 4 Insurance - Property & Casualty names. WRB ranks #4 (7.8% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	SIGI	Selective Insurance Group Inc	729,748	$55,015,701
2	LMND	Lemonade, Inc.	672,383	$42,144,966
3	MKL	Markel Group Inc.	6,271	$12,003,132
4	WRB	Berkley W R Corp This page	139,425	$9,241,089

25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$9,241,089	139,425	-3.4%	Shares	Sole	2026-05-15
2025-12-31	$10,121,190	144,341	-0.8%	Shares	Sole	2026-02-17
2025-09-30	$11,144,608	145,453	-2.9%	Shares	Sole	2025-11-14
2025-06-30	$11,004,630	149,784	-0.3%	Shares	Sole	2025-08-14
2025-03-31	$10,690,509	150,232	-3.0%	Shares	Sole	2025-05-15
2024-12-31	$9,063,636	154,881	-0.1%	Shares	Sole	2025-02-14
2024-09-30	$8,798,142	155,088	+47.1%	Shares	Sole	2024-11-14
2024-06-30	$8,283,987	105,421	+0.0%	Shares	Sole	2024-08-14
2024-03-31	$9,319,630	105,378	-1.3%	Shares	Sole	2024-05-15
2023-12-31	$7,547,314	106,721	+0.1%	Shares	Sole	2024-02-14
2023-09-30	$6,767,658	106,594	-1.0%	Shares	Sole	2023-11-14
2023-06-30	$6,411,996	107,656	-1.0%	Shares	Sole	2023-08-14
2023-03-31	$6,771,278	108,758	-43.9%	Shares	Sole	2023-05-15
2022-12-31	$14,061,163	193,760	-29.6%	Shares	Sole	2023-02-14
2022-09-30	$17,770,206	275,166	-0.5%	Shares	Sole	2022-11-14
2022-06-30	$18,882,845	276,631	-14.2%	Shares	Sole	2022-07-20
2022-03-31	$21,471,130	322,438	+49.5%	Shares	Sole	2022-04-14
2021-12-31	$17,775,488	215,748	-1.4%	Shares	Sole	2022-01-19
2021-09-30	$16,010,591	218,784	-2.6%	Shares	Sole	2021-10-19
2021-06-30	$16,723,527	224,688	+5.4%	Shares	Sole	2021-08-09
2021-03-31	$16,069,598	213,266	+36.0%	Shares	Sole	2021-05-13
2020-12-31	$10,414,323	156,795	+3.8%	Shares	Sole	2021-01-19
2020-09-30	$9,233,718	151,001	-7.8%	Shares	Sole	2020-11-16
2020-06-30	$9,383,921	163,797	-10.3%	Shares	Sole	2020-07-17
2020-03-31	$9,524,794	182,572	—	Shares	Sole	2020-04-16
No filing history on record for this holder in this stock.