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Disclosery

Main Street Research LLC: MU position timeline

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

Main Street Research LLC held 108,636 MU shares at 2026-06-30 per its 13F-HR filed 2026-07-29.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 108,636 shares
    Change vs previous 13F -473 shares

    5.92% of the 13F portfolio, value $125,397,358.

    13F-HR 0001420506-26-001335 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).

  2. period ended2026-03-31
    13F 109,109 shares
    Change vs previous 13F +103,786 shares

    2.14% of the 13F portfolio, value $36,861,339.

    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).

  3. period ended2025-12-31
    13F 5,323 shares
    Change vs previous 13F -653 shares

    0.09% of the 13F portfolio, value $1,519,857.

    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).

  4. period ended2025-09-30
    13F 5,976 shares
    Change vs previous 13F +47 shares

    0.05% of the 13F portfolio, value $999,904.

    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).

  5. period ended2025-06-30
    13F 5,929 shares
    Change vs previous 13F +5,929 shares

    0.05% of the 13F portfolio, value $730,749.

    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).

  6. period ended2024-12-31
    13F 0 shares
    Change vs previous 13F -1,961 shares

    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).

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

  7. period ended2024-09-30
    13F 1,961 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $203,375.

    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).