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CASTLEARK MANAGEMENT LLC: BKR position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of CASTLEARK MANAGEMENT LLC on BKR, newest first. How the timeline and the estimate are built.

CASTLEARK MANAGEMENT LLC held 330,020 BKR 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 330,020 shares
    Change vs previous 13F -57,170 shares

    0.49% of the 13F portfolio, value $18,316,110.

    13F-HR 0001106832-26-000004 filed by CASTLEARK MANAGEMENT LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  2. period ended2026-03-31
    13F 387,190 shares
    Change vs previous 13F +334,110 shares

    0.78% of the 13F portfolio, value $23,637,950.

    13F-HR 0001106832-26-000003 filed by CASTLEARK MANAGEMENT LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  3. period ended2025-12-31
    13F 53,080 shares
    Change vs previous 13F 0 shares

    0.07% of the 13F portfolio, value $2,417,263.

    13F-HR 0001106832-26-000001 filed by CASTLEARK MANAGEMENT LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  4. period ended2025-09-30
    13F 53,080 shares
    Change vs previous 13F 0 shares

    0.07% of the 13F portfolio, value $2,586,058.

    13F-HR 0001106832-25-000008 filed by CASTLEARK MANAGEMENT LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  5. period ended2025-06-30
    13F 53,080 shares
    Change vs previous 13F +15,150 shares

    0.06% of the 13F portfolio, value $2,035,087.

    13F-HR 0001106832-25-000006 filed by CASTLEARK MANAGEMENT LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  6. period ended2025-03-31
    13F 37,930 shares
    Change vs previous 13F 0 shares

    0.06% of the 13F portfolio, value $1,667,024.

    13F-HR 0001106832-25-000004 filed by CASTLEARK MANAGEMENT LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  7. period ended2024-12-31
    13F 37,930 shares
    Change vs previous 13F not available

    0.05% of the 13F portfolio, value $1,555,889.

    13F-HR 0001106832-25-000001 filed by CASTLEARK MANAGEMENT LLC
    Filed (acceptance time not in the bulk data set), ingested

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