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CASTLEARK MANAGEMENT LLC: MPLX position timeline

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

CASTLEARK MANAGEMENT LLC held 32,092 MPLX 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 32,092 shares
    Change vs previous 13F -9,800 shares

    0.05% of the 13F portfolio, value $1,807,742.

    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 41,892 shares
    Change vs previous 13F -11,220 shares

    0.08% of the 13F portfolio, value $2,390,776.

    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 53,112 shares
    Change vs previous 13F -7,510 shares

    0.08% of the 13F portfolio, value $2,834,587.

    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 60,622 shares
    Change vs previous 13F 0 shares

    0.08% of the 13F portfolio, value $3,028,069.

    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 60,622 shares
    Change vs previous 13F -9,510 shares

    0.09% of the 13F portfolio, value $3,122,639.

    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 70,132 shares
    Change vs previous 13F -59,510 shares

    0.13% of the 13F portfolio, value $3,753,465.

    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 129,642 shares
    Change vs previous 13F 0 shares

    0.22% of the 13F portfolio, value $6,204,666.

    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).

  8. period ended2024-09-30
    13F 129,642 shares
    Change vs previous 13F not available

    0.23% of the 13F portfolio, value $5,763,883.

    13F-HR 0001106832-24-000008 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).