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Yorktown Energy Partners XI, L.P.: REPX position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Yorktown Energy Partners XI, L.P. on REPX, newest first. How the timeline and the estimate are built.

Yorktown Energy Partners XI, L.P. held 1,284,113 REPX shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 1,284,113 shares
    Change vs previous 13F -890,860 shares

    39.15% of the 13F portfolio, value $42,324,364.

    13F-HR 0001140361-26-033072 filed by Yorktown Energy Partners XI, L.P.
    Filed (acceptance time not in the bulk data set), ingested

    • Yorktown Energy Partners X, L.P.: 0 shares
    • Yorktown Energy Partners XI, L.P.: 1,284,113 shares

    Acceptance time not in the bulk data set (spec §4.2).

  2. period ended2026-03-31
    13F 2,174,973 shares
    Change vs previous 13F 0 shares

    37.57% of the 13F portfolio, value $79,277,766.

    13F-HR 0001140361-26-021707 filed by Yorktown Energy Partners XI, L.P.
    Filed (acceptance time not in the bulk data set), ingested

    • Yorktown Energy Partners X, L.P.: 390,860 shares
    • Yorktown Energy Partners XI, L.P.: 1,784,113 shares

    Acceptance time not in the bulk data set (spec §4.2).

  3. period ended2025-12-31
    13F 2,174,973 shares
    Change vs previous 13F 0 shares

    26.06% of the 13F portfolio, value $57,419,287.

    13F-HR 0001140361-26-005796 filed by Yorktown Energy Partners XI, L.P.
    Filed (acceptance time not in the bulk data set), ingested

    • Yorktown Energy Partners X, L.P.: 390,860 shares
    • Yorktown Energy Partners XI, L.P.: 1,784,113 shares

    Acceptance time not in the bulk data set (spec §4.2).

  4. period ended2025-09-30
    13F 2,174,973 shares
    Change vs previous 13F 0 shares

    19.51% of the 13F portfolio, value $58,963,518.

    13F-HR 0001140361-25-042333 filed by Yorktown Energy Partners XI, L.P.
    Filed (acceptance time not in the bulk data set), ingested

    • Yorktown Energy Partners X, L.P.: 390,860 shares
    • Yorktown Energy Partners XI, L.P.: 1,784,113 shares

    Acceptance time not in the bulk data set (spec §4.2).

  5. period ended2025-06-30
    13F 2,174,973 shares
    Change vs previous 13F -287,627 shares

    33.49% of the 13F portfolio, value $57,049,542.

    13F-HR 0001140361-25-031284 filed by Yorktown Energy Partners XI, L.P.
    Filed (acceptance time not in the bulk data set), ingested

    • Yorktown Energy Partners VIII, L.P.: 0 shares
    • Yorktown Energy Partners X, L.P.: 390,860 shares
    • Yorktown Energy Partners XI, L.P.: 1,784,113 shares

    Acceptance time not in the bulk data set (spec §4.2).

  6. period ended2025-03-31
    13F 2,462,600 shares
    Change vs previous 13F 0 shares

    38.04% of the 13F portfolio, value $71,834,042.

    13F-HR 0001011438-25-000300 filed by Yorktown Energy Partners XI, L.P.
    Filed (acceptance time not in the bulk data set), ingested

    • Yorktown Energy Partners VIII, L.P.: 287,627 shares
    • Yorktown Energy Partners X, L.P.: 390,860 shares
    • Yorktown Energy Partners XI, L.P.: 1,784,113 shares

    Acceptance time not in the bulk data set (spec §4.2).

  7. period ended2024-12-31
    13F 2,462,600 shares
    Change vs previous 13F -287,627 shares

    31.59% of the 13F portfolio, value $78,606,192.

    13F-HR 0001011438-25-000165 filed by Yorktown Energy Partners XI, L.P.
    Filed (acceptance time not in the bulk data set), ingested

    • Yorktown Energy Partners VIII, L.P.: 287,627 shares
    • Yorktown Energy Partners X, L.P.: 390,860 shares
    • Yorktown Energy Partners XI, L.P.: 1,784,113 shares

    Acceptance time not in the bulk data set (spec §4.2).

  8. period ended2024-09-30
    13F 2,750,227 shares
    Change vs previous 13F not available

    29.93% of the 13F portfolio, value $72,853,512.

    13F-HR 0001011438-24-000630 filed by Yorktown Energy Partners XI, L.P.
    Filed (acceptance time not in the bulk data set), ingested

    • Yorktown Energy Partners VIII, L.P.: 575,254 shares
    • Yorktown Energy Partners X, L.P.: 390,860 shares
    • Yorktown Energy Partners XI, L.P.: 1,784,113 shares

    Acceptance time not in the bulk data set (spec §4.2).