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Disclosery

Main Street Research LLC: IBM position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Main Street Research LLC on IBM, newest first. How the timeline and the estimate are built.

Main Street Research LLC held 0 IBM shares at 2026-03-31 per its 13F-HR filed 2026-04-30.

the latest 13F is the newest step

  1. period ended2026-03-31
    13F 0 shares
    Change vs previous 13F -848 shares

    13F-HR 0001420506-26-000773 filed by Main Street Research LLC
    Filed (acceptance time not in the bulk data set), ingested

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

    Exited: the 13F for this period no longer lists the position.

  2. period ended2025-12-31
    13F 848 shares
    Change vs previous 13F -447 shares

    0.01% of the 13F portfolio, value $251,186.

    13F-HR 0001420506-26-000210 filed by Main Street Research LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  3. period ended2025-09-30
    13F 1,295 shares
    Change vs previous 13F -82 shares

    0.02% of the 13F portfolio, value $365,397.

    13F-HR 0001420506-25-003188 filed by Main Street Research LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  4. period ended2025-06-30
    13F 1,377 shares
    Change vs previous 13F -52 shares

    0.03% of the 13F portfolio, value $405,912.

    13F-HR 0001420506-25-001710 filed by Main Street Research LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  5. period ended2025-03-31
    13F 1,429 shares
    Change vs previous 13F -230 shares

    0.02% of the 13F portfolio, value $355,335.

    13F-HR 0001420506-25-000840 filed by Main Street Research LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  6. period ended2024-12-31
    13F 1,659 shares
    Change vs previous 13F +255 shares

    0.02% of the 13F portfolio, value $364,698.

    13F-HR 0001420506-25-000201 filed by Main Street Research LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  7. period ended2024-09-30
    13F 1,404 shares
    Change vs previous 13F not available

    0.02% of the 13F portfolio, value $310,477.

    13F-HR 0001941040-24-000499 filed by Main Street Research LLC
    Filed (acceptance time not in the bulk data set), ingested

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