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CASTLEARK MANAGEMENT LLC: MBB position timeline

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

CASTLEARK MANAGEMENT LLC held 204,235 MBB 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 204,235 shares
    Change vs previous 13F 0 shares

    0.52% of the 13F portfolio, value $19,304,292.

    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 204,235 shares
    Change vs previous 13F 0 shares

    0.64% of the 13F portfolio, value $19,392,113.

    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 204,235 shares
    Change vs previous 13F +7,330 shares

    0.57% of the 13F portfolio, value $19,447,257.

    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 196,905 shares
    Change vs previous 13F 0 shares

    0.53% of the 13F portfolio, value $18,735,511.

    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 196,905 shares
    Change vs previous 13F 0 shares

    0.56% of the 13F portfolio, value $18,487,410.

    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 196,905 shares
    Change vs previous 13F 0 shares

    0.64% of the 13F portfolio, value $18,465,751.

    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 196,905 shares
    Change vs previous 13F not available

    0.63% of the 13F portfolio, value $18,052,250.

    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).