# Yorktown Energy Partners X, L.P.: Form 13F holdings

An institutional investment manager in New York, NY. SEC CIK 1577919.

- Quarter ended: 2026-06-30
- Filed: 2026-08-14
- Reported value: $47.6m
- Positions: 3 (3 lines in the filing's table; lines for the same security and option type are added together here)
- Compared with: the 13F for the quarter ended 2026-03-31
- Filing: https://www.sec.gov/Archives/edgar/data/1577919/000114036126033067/

## Holdings

As filed, largest first. Reported value is what the manager stated at the quarter end (Jun 30, 2026), in US dollars; it is filing data, not a price. Weight is the share of the total reported value.

| Issuer | Class | Reported value | Weight | Shares | Put or call | Change on the quarter before |
| --- | --- | ---: | ---: | ---: | --- | --- |
| [Ramaco Resources Inc (METC)](/companies/metc.md) | COM CL A | $26.1m | 54.8% | 1,969,646 |  | Unchanged |
| [Epsilon Energy Ltd (EPSN)](/companies/epsn.md) | COM | $14.4m | 30.2% | 2,656,705 |  | Unchanged |
| [Ramaco Resources Inc (METC)](/companies/metc.md) | COM CL B | $7.2m | 15.0% | 836,511 |  | Added +9,900 |

## Sold out

Held at the end of the quarter before and not reported this quarter.

| Issuer | Class | Reported value | Weight | Shares | Put or call | Change on the quarter before |
| --- | --- | ---: | ---: | ---: | --- | --- |
| [Riley Exploration Permian Inc (REPX)](/companies/repx.md) | COM | $0 | 0.0% | 0 |  | Sold out −390,860 |

Source: SEC EDGAR, Form 13F-HR, accession 0001140361-26-033067. Last ingested by Listed: Oct 22, 2026, 05:26 ET. No prices; not investment advice.