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Grantham, Mayo, Van Otterloo & Co. LLC: RIO position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Grantham, Mayo, Van Otterloo & Co. LLC on RIO, newest first. How the timeline and the estimate are built.

Grantham, Mayo, Van Otterloo & Co. LLC held 1,839,135 RIO shares at 2026-06-30 per its 13F-HR filed 2026-08-13.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 1,839,135 shares
    Change vs previous 13F -165,702 shares

    0.39% of the 13F portfolio, value $174,589,086.

    13F-HR 0001072613-26-000636 filed by Grantham, Mayo, Van Otterloo & Co. 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 2,004,837 shares
    Change vs previous 13F +436,593 shares

    0.48% of the 13F portfolio, value $187,031,244.

    13F-HR 0001072613-26-000397 filed by Grantham, Mayo, Van Otterloo & Co. 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 1,568,244 shares
    Change vs previous 13F +441,799 shares

    0.32% of the 13F portfolio, value $125,506,567.

    13F-HR 0001072613-26-000185 filed by Grantham, Mayo, Van Otterloo & Co. 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 1,126,445 shares
    Change vs previous 13F +199,962 shares

    0.21% of the 13F portfolio, value $74,356,634.

    13F-HR 0001072613-25-000786 filed by Grantham, Mayo, Van Otterloo & Co. 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 926,483 shares
    Change vs previous 13F +154,407 shares

    0.16% of the 13F portfolio, value $54,041,753.

    13F-HR 0001072613-25-000542 filed by Grantham, Mayo, Van Otterloo & Co. 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 772,076 shares
    Change vs previous 13F +384,612 shares

    0.15% of the 13F portfolio, value $46,386,326.

    13F-HR 0001072613-25-000369 filed by Grantham, Mayo, Van Otterloo & Co. 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 387,464 shares
    Change vs previous 13F -16,490 shares

    0.07% of the 13F portfolio, value $22,786,758.

    13F-HR 0001072613-25-000109 filed by Grantham, Mayo, Van Otterloo & Co. 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 403,954 shares
    Change vs previous 13F not available

    0.09% of the 13F portfolio, value $28,749,406.

    13F-HR 0001072613-24-000820 filed by Grantham, Mayo, Van Otterloo & Co. LLC
    Filed (acceptance time not in the bulk data set), ingested

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