Yorktown Energy Partners X, L.P.

Est. AUM

$69.5M

13F long equity, this entity only

Positions

Period

Mar 2026 (Q1)

SEC EDGAR

Mar 2026 (Q1)

#	Issuer	Class	Value	Shares	% Portfolio	Discretion
1	Ramaco Resources Inc	COM CL A	$30.5M	1969646	43.82%	DFND
2	Epsilon Energy Ltd	COM	$16.4M	2656705	23.55%	DFND
3	Riley Exploration Permian Inc	COM	$14.2M	390860	20.50%	DFND
4	Ramaco Resources Inc	COM CL B	$8.4M	826611	12.13%	DFND

Values in USD (reported in $thousands on 13F). Source: SEC EDGAR.