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VIKING FUND MANAGEMENT LLC: RIO position timeline

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

VIKING FUND MANAGEMENT LLC held 3,000 RIO shares at 2026-06-30 per its 13F-HR filed 2026-07-13.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 3,000 shares
    Change vs previous 13F -1,000 shares

    0.03% of the 13F portfolio, value $284,790.

    13F-HR 0001169069-26-000006 filed by VIKING FUND 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 4,000 shares
    Change vs previous 13F 0 shares

    0.04% of the 13F portfolio, value $373,160.

    13F-HR 0001169069-26-000004 filed by VIKING FUND 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 4,000 shares
    Change vs previous 13F -3,000 shares

    0.04% of the 13F portfolio, value $320,120.

    13F-HR 0001169069-26-000002 filed by VIKING FUND 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 7,000 shares
    Change vs previous 13F +4,000 shares

    0.06% of the 13F portfolio, value $462,070.

    13F-HR 0001169069-25-000009 filed by VIKING FUND 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 3,000 shares
    Change vs previous 13F -1,500 shares

    0.02% of the 13F portfolio, value $174,990.

    13F-HR 0001169069-25-000007 filed by VIKING FUND 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 4,500 shares
    Change vs previous 13F +1,100 shares

    0.04% of the 13F portfolio, value $270,360.

    13F-HR 0001169069-25-000004 filed by VIKING FUND 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 3,400 shares
    Change vs previous 13F 0 shares

    0.03% of the 13F portfolio, value $199,954.

    13F-HR 0001169069-25-000002 filed by VIKING FUND 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 3,400 shares
    Change vs previous 13F not available

    0.04% of the 13F portfolio, value $241,978.

    13F-HR 0001169069-24-000080 filed by VIKING FUND MANAGEMENT LLC
    Filed (acceptance time not in the bulk data set), ingested

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