Yorktown Energy Partners X’s Riley Exploration Permian REPX Stock Holding History

Yorktown Energy Partners X’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	$14.2M	Hold	390,860	–	–	20.5%	3
2025 Q4	$10.3M	Hold	390,860	–	–	13.33%	3
2025 Q3	$10.6M	Hold	390,860	–	–	9.86%	3
2025 Q2	$10.3M	Hold	390,860	–	–	18.52%	2
2025 Q1	$11.4M	Hold	390,860	–	–	28.32%	2
2024 Q4	$12.5M	Hold	390,860	–	–	23.85%	2
2024 Q3	$10.4M	Hold	390,860	–	–	18.68%	2
2024 Q2	$11.1M	Hold	390,860	–	–	18.88%	2
2024 Q1	$12.9M	Hold	390,860	–	–	15.09%	2
2023 Q4	$10.6M	Hold	390,860	–	–	13.28%	2
2023 Q3	$12.4M	Hold	390,860	–	–	9.29%	3
2023 Q2	$14M	Hold	390,860	–	–	11.56%	3
2023 Q1	$14.9M	Hold	390,860	–	–	14.3%	3
2022 Q4	$11.5M	Hold	390,860	–	–	10.39%	3
2022 Q3	$7.42M	Hold	390,860	–	–	7.09%	3
2022 Q2	$9.45M	Hold	390,860	–	–	7.15%	3
2022 Q1	$9.8M	Hold	390,860	–	–	3.11%	3
2021 Q4	$7.55M	Hold	390,860	–	–	2.83%	4
2021 Q3	$9.18M	Buy	+390,860	New	+$8.31M	3.01%	4

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

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Yorktown Energy Partners X's REPX Position: Q1 2026 in Review

Yorktown Energy Partners X held its Riley Exploration Permian (REPX) position steady in Q1 2026 at 390,860 shares worth $14.2M. The position accounts for 20.5% of the portfolio, ranked #3.

Yorktown Energy Partners X first reported a position in REPX in Q3 2021 and has held it in 19 quarters since. The position peaked at $14.9M in Q1 2023. 168 funds tracked by Wall St. Rank hold REPX as of Q1 2026.

Yorktown Energy Partners X held 390,860 shares of Riley Exploration Permian worth $14.2M as of Q1 2026.
Yorktown Energy Partners X left its Riley Exploration Permian share count unchanged in Q1 2026.
Riley Exploration Permian made up 20.5% of Yorktown Energy Partners X's portfolio in Q1 2026, its #3 holding.
Yorktown Energy Partners X first reported a position in Riley Exploration Permian in Q3 2021 and has held it in 19 quarters since.
Yorktown Energy Partners X's Riley Exploration Permian position peaked at $14.9M in Q1 2023.
168 funds tracked by Wall St. Rank held Riley Exploration Permian as of Q1 2026.

Based on Yorktown Energy Partners X's 13F filing for Q1 2026, filed 15 May 2026.