Yorktown Energy Partners X, L.P. — 13F Holdings & Portfolio
CIK 1577919 · latest 13F-HR filed 2026-05-15
Yorktown Energy Partners X, L.P. manages $69.5M in 13F-reported U.S. long-equity assets across 4 reported positions as of its 2026-03-31 13F-HR filing. Its largest disclosed positions are METC (43.82%), EPSN (23.55%), REPX (20.50%). Quarter over quarter (versus its 2025-12-31 filing) the fund opened 0 new positions, exited 0, added to 2, and trimmed 2.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
$69.5M
Long-equity book
4
Distinct positions
2026-03-31
Filed 2026-05-15
+0 / −0 / ↑2 / ↓2
vs 2025-12-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- Epsilon Energy Ltd$4.0M +32.8%
- Riley Exploration Permian Inc$3.9M +38.1%
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | Ramaco Resources Inc | METC | 75134P600 | $30.5M | 43.82% | 1,969,646 | SH |
| 2 | Epsilon Energy Ltd | EPSN | 294375209 | $16.4M | 23.55% | 2,656,705 | SH |
| 3 | Riley Exploration Permian Inc | REPX | 76665T102 | $14.2M | 20.50% | 390,860 | SH |
| 4 | Ramaco Resources Inc | METCB | 75134P501 | $8.4M | 12.13% | 826,611 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-03-31 | 2026-05-15 | $69.5M | 4 | 0001140361-26-021709 |
| 2025-12-31 | 2026-02-17 | $77.4M | 4 | 0001140361-26-005790 |
| 2025-09-30 | 2025-11-14 | $107.4M | 3 | 0001140361-25-042330 |