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Disclosery

Main Street Research LLC: ISTB position timeline

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

Main Street Research LLC held 24,592 ISTB 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 24,592 shares
    Change vs previous 13F +534 shares

    0.06% of the 13F portfolio, value $1,186,564.

    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 24,058 shares
    Change vs previous 13F +1,295 shares

    0.07% of the 13F portfolio, value $1,165,851.

    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 22,763 shares
    Change vs previous 13F +1,535 shares

    0.06% of the 13F portfolio, value $1,109,696.

    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 21,228 shares
    Change vs previous 13F +2,262 shares

    0.06% of the 13F portfolio, value $1,036,776.

    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 18,966 shares
    Change vs previous 13F +1,686 shares

    0.06% of the 13F portfolio, value $922,696.

    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 ended2025-03-31
    13F 17,280 shares
    Change vs previous 13F not available

    0.05% of the 13F portfolio, value $835,488.

    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).