Yorktown Energy Partners X, L.P.
New York, NY · CIK 1577919 · 13F filing filed 2026-08-14
No investment adviser registration (Form ADV) found for this filer. It may be a parent company whose subsidiaries are the registered advisers, a bank or insurer, or a manager based outside the US.
$47.6m
reported value
-31.5% vs Q1 2026
3positions
100.0%in top 10
0 new
1 added
0 reduced
1 sold out
vs Q1 2026
This report includes the holdings of 2 other managers that share the investment decisions:
- Yorktown X Associates LLC – reports through this filing
- Yorktown X Co LP – reports through this filing
Shares in two reports are counted once in each security's totals.
Holdings, Q2 2026
The small lines show how much was held over the last 4 quarters (adjusted for stock splits).
| Security | Value | Change |
|---|---|---|
| RAMACO RES INC METC | $26.1m54.76% | Unchanged |
| EPSILON ENERGY LTD EPSN | $14.4m30.21% | Unchanged |
| RAMACO RES INC METCB | $7.2m15.03% | Added +9.9k |
Sold out since Q1 2026
| Security | Value then |
|---|---|
| RILEY EXPLORATION PERMIAN IN REPX | $14.2m390.9k shares |
Stakes above 5%
Companies where this manager has reported owning more than 5% of a class of shares, on Schedule 13D (may seek influence) or 13G (passive): its latest filing for each, from 19 Dec 2024 on.
| Company | Stake |
|---|---|
| EPSILON ENERGY LTD EPSN · 13D · filed 2025-11-25 | 8.9%≈ $14.4m |
| SOLARIS ENERGY INFRAS INC SEI · 13G · filed 2026-08-14 | 7.2%≈ $408.7m |