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Disclosery

MARSHALL WACE, LLP: WDC position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of MARSHALL WACE, LLP on WDC, newest first. How the timeline and the estimate are built.

MARSHALL WACE, LLP held 400,306 WDC 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 400,306 shares
    Change vs previous 13F -531,017 shares

    0.22% of the 13F portfolio, value $255,687,423.

    13F-HR 0001318757-26-000010 filed by MARSHALL WACE, LLP
    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 931,323 shares
    Change vs previous 13F +769,455 shares

    0.27% of the 13F portfolio, value $251,913,559.

    13F-HR 0001318757-26-000005 filed by MARSHALL WACE, LLP
    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 161,868 shares
    Change vs previous 13F -160,528 shares

    0.03% of the 13F portfolio, value $27,885,000.

    13F-HR 0001318757-26-000003 filed by MARSHALL WACE, LLP
    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 322,396 shares
    Change vs previous 13F +275,724 shares

    0.04% of the 13F portfolio, value $38,706,864.

    13F-HR 0001318757-25-000046 filed by MARSHALL WACE, LLP
    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 46,672 shares
    Change vs previous 13F +12,872 shares

    <0.01% of the 13F portfolio, value $2,986,541.

    13F-HR 0001318757-25-000034 filed by MARSHALL WACE, LLP
    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 33,800 shares
    Change vs previous 13F -462,526 shares

    <0.01% of the 13F portfolio, value $1,366,534.

    13F-HR 0001318757-25-000023 filed by MARSHALL WACE, LLP
    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 496,326 shares
    Change vs previous 13F +207,406 shares

    0.04% of the 13F portfolio, value $29,595,920.

    13F-HR 0002048047-25-000005 filed by MARSHALL WACE, LLP
    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 288,920 shares
    Change vs previous 13F not available

    0.03% of the 13F portfolio, value $19,730,348.

    13F-HR 0001318757-24-000018 filed by MARSHALL WACE, LLP
    Filed (acceptance time not in the bulk data set), ingested

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