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Disclosery

Alta Advisers Ltd: WDC position timeline

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

Alta Advisers Ltd held 18,372 WDC shares at 2026-06-30 per its 13F-HR filed 2026-08-12.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 18,372 shares
    Change vs previous 13F +17,007 shares

    2.66% of the 13F portfolio, value $11,734,564.

    13F-HR 0000904454-26-000442 filed by Alta Advisers Ltd
    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 1,365 shares
    Change vs previous 13F 0 shares

    0.13% of the 13F portfolio, value $369,219.

    13F-HR 0000904454-26-000252 filed by Alta Advisers Ltd
    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 1,365 shares
    Change vs previous 13F -600 shares

    0.09% of the 13F portfolio, value $235,149.

    13F-HR 0000904454-26-000078 filed by Alta Advisers Ltd
    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 1,965 shares
    Change vs previous 13F not available

    0.07% of the 13F portfolio, value $235,918.

    13F-HR 0000904454-25-000547 filed by Alta Advisers Ltd
    Filed (acceptance time not in the bulk data set), ingested

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