| Quarter | Holdings | Value ($000) | Top Holdings | Form Type | Date Filed | Filing ID |
|---|---|---|---|---|---|---|
| Q4 2025 | Reported by Yorktown VIII Associates LLC, Yorktown VIII Co LP | 13F-NT | 2/17/2026 | 000114036126005801 | ||
| Q3 2025 | Reported by Yorktown VIII Associates LLC, Yorktown VIII Co LP | 13F-NT | 11/14/2025 | 000114036125042327 | ||
| Q2 2025 | 1 | 0 | 13F-HR | 8/14/2025 | 000114036125031224 | |
| Q1 2025 | 2 | 52,874 | AR, REPX | 13F-HR | 5/15/2025 | 000101143825000291 |
| Q4 2024 | 2 | 79,281 | AR, REPX | 13F-HR | 2/14/2025 | 000101143825000156 |
| Q3 2024 | 2 | 72,538 | AR, REPX | 13F-HR | 11/13/2024 | 000101143824000621 |
| Q2 2024 | 2 | 81,545 | AR, REPX | 13F-HR | 8/13/2024 | 000101143824000432 |
| Q1 2024 | 2 | 122,483 | AR, REPX | 13F-HR | 5/15/2024 | 000101143824000363 |
| Q4 2023 | 2 | 120,009 | AR, REPX | 13F-HR | 2/14/2024 | 000101143824000198 |
| Q3 2023 | 3 | 144,352 | AR, REPX, SWN | 13F-HR | 11/14/2023 | 000101143823000641 |
| Q2 2023 | 3 | 146,649 | AR, RILEY EXPLORATION PERMIAN IN, SWN | 13F-HR | 8/14/2023 | 000101143823000533 |
| Q1 2023 | 2 | 105,771 | AR, SWN | 13F-HR | 5/12/2023 | 000101143823000386 |
| Q4 2022 | 2 | 139,651 | AR, SWN | 13F-HR | 2/14/2023 | 000101143823000270 |
| Q3 2022 | 2 | 169,066 | AR, SWN | 13F-HR | 11/14/2022 | 000156761922020010 |
| Q2 2022 | 2 | 195,452 | AR, SWN | 13F-HR | 8/11/2022 | 000094787122000852 |
| Q1 2022 | 3 | 280,825 | AR, SWN, AM | 13F-HR | 5/16/2022 | 000094787122000575 |
| Q4 2021 | 3 | 205,710 | AR, SWN, AM | 13F-HR | 2/14/2022 | 000094787122000233 |
| Q3 2021 | 3 | 251,678 | AR, SWN, AM | 13F-HR | 11/15/2021 | 000094787121001183 |
| Q2 2021 | 2 | 173,956 | AR, AM | 13F-HR | 8/16/2021 | 000094787121000917 |
| Q1 2021 | 2 | 124,327 | AR, AM | 13F-HR | 5/17/2021 | 000094787121000543 |
| Q4 2020 | 2 | 83,383 | AR, AMGP | 13F-HR | 2/16/2021 | 000094787121000203 |
| Q3 2020 | 2 | 47,172 | AR, AMGP | 13F-HR | 11/16/2020 | 000094787120000878 |
| Q2 2020 | 2 | 44,053 | AR, AMGP | 13F-HR | 8/14/2020 | 000156761920015430 |
| Q1 2020 | 2 | 14,638 | AR, AMGP | 13F-HR | 5/15/2020 | 000156761920010461 |
| Q4 2019 | 2 | 55,863 | AR, AMGP | 13F-HR | 2/14/2020 | 000156761920004095 |
| Q3 2019 | 2 | 70,453 | AMGP, AR | 13F-HR | 11/14/2019 | 000114036119020597 |
| Q2 2019 | 3 | 120,534 | AMGP, AR, HNRG | 13F-HR | 8/14/2019 | 000095012319008374 |
| Q1 2019 | 3 | 194,774 | AMGP, AR, HNRG | 13F-HR | 5/15/2019 | 000095012319005479 |
| Q4 2018 | 3 | 187,063 | AR, AMGP, HNRG | 13F-HR | 2/14/2019 | 000095012319002332 |
| Q3 2018 | 3 | 322,969 | AR, AMGP, HNRG | 13F-HR | 11/14/2018 | 000095012318011895 |
| Q2 2018 | 3 | 377,387 | AR, AMGP, HNRG | 13F-HR | 8/14/2018 | 000095012318008833 |
| Q1 2018 | 3 | 340,601 | AR, AMGP, HNRG | 13F-HR | 5/15/2018 | 000095012318005469 |
| Q4 2017 | 3 | 355,890 | AR, AMGP, HNRG | 13F-HR | 2/14/2018 | 000095012318002232 |
| Q3 2017 | 3 | 369,500 | AR, AMGP, HNRG | 13F-HR | 11/14/2017 | 000095012317010763 |
| Q2 2017 | 3 | 404,084 | AR, AMGP, HNRG | 13F-HR | 8/14/2017 | 000095012317007791 |
| Q1 2017 | 2 | 261,426 | AR, HNRG | 13F-HR | 5/15/2017 | 000095012317005356 |
| Q4 2016 | 2 | 273,369 | AR, HNRG | 13F-HR | 2/14/2017 | 000095012317002259 |
| Q3 2016 | 2 | 304,202 | AR, HNRG | 13F-HR | 11/14/2016 | 000095012316022314 |
| Q2 2016 | 2 | 284,473 | AR, HNRG | 13F-HR | 8/15/2016 | 000095012316020175 |
| Q1 2016 | 2 | 272,754 | AR, HNRG | 13F-HR | 5/16/2016 | 000095012316017493 |
| Q4 2015 | 2 | 253,950 | AR, HNRG | 13F-HR | 2/16/2016 | 000095012316015172 |