Marshall Wace’s Riley Exploration Permian REPX Stock Holding History

Marshall Wace’s Portfolio REPX Stock Details REPX Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$11.2M	Buy	+306,556	New	+$9.13M	0.01%	924
2025 Q1	–	Sell	-31,582	Closed	-$1.01M	–	3019
2024 Q4	$1.01M	Sell	31,582 -19,094	-38%	-$589K	﹤0.01%	1734
2024 Q3	$1.34M	Sell	50,676 -33,975	-40%	-$936K	﹤0.01%	1525
2024 Q2	$2.4M	Buy	+84,651	New	+$2.33M	﹤0.01%	1281
2023 Q1	–	Sell	-21,028	Closed	-$619K	–	3038
2022 Q4	$619K	Sell	21,028 -21,425	-50%	-$609K	﹤0.01%	2290
2022 Q3	$805K	Sell	42,453 -18,268	-30%	-$448K	﹤0.01%	2514
2022 Q2	$1.47M	Buy	60,721 +16,764	+38%	+$429K	﹤0.01%	2211
2022 Q1	$1.1M	Buy	43,957 +5,969	+16%	+$160K	﹤0.01%	2410
2021 Q4	$734K	Buy	37,988 +796	+2%	+$17.7K	﹤0.01%	2620
2021 Q3	$873K	Buy	+37,192	New	+$791K	﹤0.01%	2101

Other funds holding REPX

YEPX

Yorktown Energy Partners XI New York $142M AUM 130.51% 1-Year Est. Return

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

BEP

Bluescape Energy Partners Dallas, Texas $322M AUM 18.33% 1-Year Est. Return

American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

Arrowstreet Capital Boston, Massachusetts $185B AUM 39.58% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

DCM

Driehaus Capital Management Chicago, Illinois $13.6B AUM 173.98% 1-Year Est. Return

Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return

YEPX

Yorktown Energy Partners X New York $69.5M AUM 143.07% 1-Year Est. Return

Marshall Wace's REPX Position: Q1 2026 in Review

Marshall Wace opened a new position in Riley Exploration Permian (REPX) in Q1 2026: 306,556 shares worth $11.2M. The stake represents 0.01% of the portfolio and ranks #924 among its holdings. This is a return to the name: Marshall Wace previously reported a position in REPX as recently as Q4 2024.

Marshall Wace first reported a position in REPX in Q3 2021 and has held it in 10 quarters since. 168 funds tracked by Wall St. Rank hold REPX as of Q1 2026.

Marshall Wace held 306,556 shares of Riley Exploration Permian worth $11.2M as of Q1 2026.
Riley Exploration Permian was a new Marshall Wace position in Q1 2026.
Riley Exploration Permian made up 0.01% of Marshall Wace's portfolio in Q1 2026, its #924 holding.
Marshall Wace first reported a position in Riley Exploration Permian in Q3 2021 and has held it in 10 quarters since.
168 funds tracked by Wall St. Rank held Riley Exploration Permian as of Q1 2026.

Based on Marshall Wace's 13F filing for Q1 2026, filed 15 May 2026.