Jane Street’s W.R. Berkley WRB Stock Holding History

Jane Street’s Portfolio WRB Stock Details WRB Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$1.03M	Buy	15,600 +3,600	+30%	+$248K	﹤0.01%	6429
2025 Q4	$841K	Buy	+12,000	New	+$884K	﹤0.01%	6499
2024 Q1	–	Sell	-48,750	Closed	-$2.3M	–	10188
2023 Q4	$2.3M	Buy	+48,750	New	+$2.22M	﹤0.01%	4090
2022 Q3	–	Sell	-4,800	Closed	-$218K	–	10578
2022 Q2	$218K	Buy	+4,800	New	+$218K	﹤0.01%	8076
2021 Q3	–	Sell	-32,400	Closed	-$1.07M	–	10840
2021 Q2	$1.07M	Buy	32,400 +21,375	+194%	+$740K	﹤0.01%	5684
2021 Q1	$369K	Sell	11,025 -9,450	-46%	-$291K	﹤0.01%	7361
2020 Q4	$604K	Buy	+20,475	New	+$590K	﹤0.01%	5452
2020 Q3	–	Sell	-13,275	Closed	-$338K	–	8024
2020 Q2	$338K	Buy	+13,275	New	+$326K	﹤0.01%	5654

Other funds holding WRB

MSI

Mitsui Sumitomo Insurance Tokyo, Japan $3.9B AUM

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Kayne Anderson Rudnick Investment Management Los Angeles, California $34B AUM 6.31% 1-Year Est. Return

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

First Trust Advisors Wheaton, Illinois $140B AUM 27.84% 1-Year Est. Return

Jane Street's WRB Position: Q1 2026 in Review

Jane Street increased its W.R. Berkley (WRB) stake by 5,849% in Q1 2026, buying an estimated $68.7M and bringing the position to 1,014,135 shares worth $67.2M. The position accounts for 0.01% of the portfolio, ranked #872.

Jane Street first reported a position in WRB in Q2 2013 and has held it in 33 quarters since. 921 funds tracked by Wall St. Rank hold WRB as of Q1 2026.

Jane Street held 1,014,135 shares of W.R. Berkley worth $67.2M as of Q1 2026.
Jane Street bought 997,088 W.R. Berkley shares in Q1 2026, an estimated $68.7M.
W.R. Berkley made up 0.01% of Jane Street's portfolio in Q1 2026, its #872 holding.
Jane Street first reported a position in W.R. Berkley in Q2 2013 and has held it in 33 quarters since.
921 funds tracked by Wall St. Rank held W.R. Berkley as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.