Marshall Wace’s LandBridge Co LB Stock Holding History

Marshall Wace’s Portfolio LB Stock Details LB Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$9.39M	Sell	118,494 -443,568	-79%	-$30.5M	0.01%	1066
2026 Q1	$38.8M	Buy	562,062 +419,556	+294%	+$26.7M	0.04%	451
2025 Q4	$6.98M	Buy	+142,506	New	+$8.29M	0.01%	1008
2025 Q3	–	Sell	-27,932	Closed	-$1.89M	–	3509
2025 Q2	$1.89M	Buy	+27,932	New	+$2.01M	﹤0.01%	1586
2024 Q3	–	Sell	-50,000	Closed	-$1.16M	–	3034
2024 Q2	$1.16M	Buy	+50,000	New	+$1.16M	﹤0.01%	1623

Other funds holding LB

First Manhattan New York $39.2B AUM 21.04% 1-Year Est. Return

HKAM

Horizon Kinetics Asset Management New York $8.82B AUM 23.05% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

William Blair Investment Management Chicago, Illinois $33.3B AUM 44.76% 1-Year Est. Return

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

SIC

Schwartz Investment Counsel Plymouth, Michigan $3.01B AUM 27.22% 1-Year Est. Return

HRCM

Hood River Capital Management Palm Beach Gardens, Florida $13.8B AUM 163.97% 1-Year Est. Return

UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return

Marshall Wace's LB Position: Q2 2026 in Review

Marshall Wace reduced its LandBridge Co (LB) stake by 79% in Q2 2026, selling an estimated $30.5M and leaving 118,494 shares worth $9.39M. The position accounts for 0.01% of the portfolio, ranked #1066.

Marshall Wace first reported a position in LB in Q2 2024 and has held it in 5 quarters since. The position peaked at $38.8M in Q1 2026. 193 funds tracked by Wall St. Rank hold LB as of Q2 2026.

Marshall Wace held 118,494 shares of LandBridge Co worth $9.39M as of Q2 2026.
Marshall Wace sold 443,568 LandBridge Co shares in Q2 2026, an estimated $30.5M.
LandBridge Co made up 0.01% of Marshall Wace's portfolio in Q2 2026, its #1066 holding.
Marshall Wace first reported a position in LandBridge Co in Q2 2024 and has held it in 5 quarters since.
Marshall Wace's LandBridge Co position peaked at $38.8M in Q1 2026.
193 funds tracked by Wall St. Rank held LandBridge Co as of Q2 2026.

Based on Marshall Wace's 13F filing for Q2 2026, filed 13 Aug 2026.