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Disclosery

Main Street Research LLC: ISCF position timeline

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

Main Street Research LLC held 2,027,356 ISCF 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 2,027,356 shares
    Change vs previous 13F +68,729 shares

    4.14% of the 13F portfolio, value $87,764,241.

    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 1,958,627 shares
    Change vs previous 13F +50,827 shares

    4.76% of the 13F portfolio, value $81,851,022.

    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 1,907,800 shares
    Change vs previous 13F +412,800 shares

    4.53% of the 13F portfolio, value $79,135,544.

    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 1,495,000 shares
    Change vs previous 13F not available

    3.32% of the 13F portfolio, value $61,481,881.

    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).