Yorktown Energy Partners X, L.P.
Yorktown Energy Partners X, L.P. reported 3 US-listed holdings worth $47.6 million in its 13F for the quarter ended 30 June 2026, filed 14 August 2026. Its largest: Ramaco Res Inc. (54.8%), Epsilon Energy Ltd (30.2%) and Ramaco Res Inc. (15.0%). Against the quarter before, it opened 0 positions, added to 1, trimmed 0 and sold out of 1.
The 3 largest of its 3 positions, each sized by its share of the reported holdings, coloured by the change in shares against Q1 2026.
What the fund reported holding at each quarter's end; hover a bar for the number of positions
What its reported holdings returned
Held through each quarter, the holdings it reported returned +20.3% over the 7 quarters to 30 June 2026, against +30.2% for the S&P 500.
Not the fund's own return: each 13F's holdings are kept unchanged until the next one, so trades inside a quarter, dividends, cash and fees are left out. A rough guide to how its picks have done over time.
What it did on the quarter
Its positions against its 13F for the quarter to 31 March 2026; a change under 0.1% of a position counts as held
Added to 1
- Ramaco Res Inc. METCB+9,900 shares · +1%
Sold out of 1
- Riley Exploration Permian, Inc. REPX$14.2 million last quarter
What it holds
| Company | Shares | Value | Of its book | Change in shares |
|---|---|---|---|---|
| Ramaco Res Inc. METC | 2.0M | $26.1 million | 54.76% | no change |
| Epsilon Energy Ltd EPSN | 2.7M | $14.4 million | 30.21% | no change |
| Ramaco Res Inc. METCB | 836.5K | $7.2 million | 15.03% | +9.9K |