JANE STREET GROUP, LLC

Position in WRB — Berkley W R Corp

CIK 1595888 NEW YORK, NY

Back to WRB Full portfolio

Position in WRB

as of Mar 31, 2026 · filed May 12, 2026 Compact

Position Value

$67,216,866

+$66,021,531 QoQ

Shares Held

1,014,135

+5849.1% QoQ

Ownership

0.272%

of shares outstanding

% of Portfolio

0.09%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

24 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Common Shares in WRB Over Time

Shares Held

Position Value (USD)

Derivatives in WRB

reported options exposure · as of Mar 31, 2026

CallValue

$5,302,400

CallShares

80,000

PutValue

$1,033,968

PutShares

15,600

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Insurance - Property & Casualty

Financial Services · as of Mar 31, 2026

JANE STREET GROUP, LLC holds $408,241,536 across 32 Insurance - Property & Casualty names. WRB ranks #2 (16.5% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	LMND	Lemonade, Inc.	1,218,215	$76,357,715
2	WRB	Berkley W R Corp This page	1,014,135	$67,216,866
3	MKL	Markel Group Inc.	34,881	$66,764,671
4	TRV	Travelers Companies, Inc.	114,872	$33,505,864
5	AFG	American Financial Group Inc	261,033	$33,336,523
6	WTM	White Mountains Insurance Group Ltd	13,808	$30,335,622
7	HCI	HCI Group, Inc.	118,220	$18,277,993
8	THG	Hanover Insurance Group, Inc.	67,758	$11,745,849

All Filings in WRB

Export CSV

38 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$1,033,968	15,600	-98.5%	Put	Defined	2026-05-12
2026-03-31	$67,216,866	1,014,135	+1167.7%	Shares	Defined	2026-05-12
2026-03-31	$5,302,400	80,000	+566.7%	Call	Defined	2026-05-12
2025-12-31	$841,440	12,000	-29.6%	Put	Defined	2026-02-12
2025-12-31	$1,195,335	17,047	-27.5%	Shares	Defined	2026-02-12
2025-12-31	$1,647,820	23,500	-74.8%	Call	Defined	2026-02-12
2025-09-30	$7,133,322	93,100	+484.0%	Call	Defined	2025-11-14
2025-09-30	$1,221,399	15,941	+121.4%	Shares	Defined	2025-11-14
2025-06-30	$528,984	7,200	0.0%	Call	Defined	2025-08-14
2025-03-31	$512,352	7,200	+64.7%	Call	Defined	2025-05-19
2025-03-31	$311,111	4,372	-98.2%	Shares	Defined	2025-05-19
2024-12-31	$14,036,489	239,858	+3534.2%	Shares	Defined	2025-02-14
2024-12-31	$386,232	6,600	-87.3%	Call	Defined	2025-02-14
2024-09-30	$2,947,123	51,950	-85.5%	Call	Defined	2024-11-15
2024-09-30	$20,340,824	358,555	+229.3%	Shares	Defined	2024-11-15
2024-06-30	$5,703,915	108,881	+101.9%	Shares	Defined	2024-08-15
2024-03-31	$3,179,653	53,929	-9.8%	Shares	Defined	2024-05-16
2023-12-31	$2,820,031	59,814	-34.5%	Shares	Defined	2024-02-15
2023-09-30	$3,865,273	91,320	+55.5%	Shares	Defined	2023-11-15
2023-06-30	$2,332,530	58,744	-17.5%	Shares	Defined	2023-08-14
2023-03-31	$2,954,529	71,182	+497.9%	Shares	Defined	2023-05-16
2022-09-30	$512,592	11,906	-68.8%	Shares	Defined	2022-11-15
2022-06-30	$1,734,396	38,113	+100.4%	Shares	Defined	2022-08-16
2022-03-31	$844,227	19,017	+21.1%	Shares	Defined	2022-05-17
2022-03-31	$696,974	15,700	+29.8%	Call	Defined	2022-05-17
2021-12-31	$443,075	12,100	-5.4%	Call	Defined	2022-02-15
2021-12-31	$468,268	12,788	+57.4%	Shares	Defined	2022-02-15
2021-09-30	$264,325	8,127	-62.6%	Shares	Defined	2021-11-16
2021-06-30	$719,555	21,752	+51.1%	Shares	Defined	2021-08-16
2021-06-30	$476,352	14,400	+4.1%	Put	Defined	2021-08-16
2021-03-31	$463,418	13,838	+182.4%	Shares	Defined	2021-05-18
2021-03-31	$164,095	4,900	-61.7%	Put	Defined	2021-05-18
2020-12-31	$377,707	12,795	+40.6%	Shares	Defined	2021-02-17
2020-12-31	$268,632	9,100	+82.3%	Put	Defined	2021-02-17
2020-09-30	$135,698	4,993	-15.4%	Shares	Defined	2020-11-17
2020-06-30	$150,226	5,900	-91.6%	Put	Defined	2020-08-17
2020-06-30	$1,787,446	70,200	+37.6%	Shares	Defined	2020-08-17
2020-03-31	$1,182,985	51,020	—	Shares	Defined	2020-05-15
No filing history on record for this holder in this stock.