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Mainstream Capital Management LLC: JPST position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Mainstream Capital Management LLC on JPST, newest first. How the timeline and the estimate are built.

Mainstream Capital Management LLC held 402,230 JPST shares at 2026-06-30 per its 13F-HR filed 2026-07-15.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 402,230 shares
    Change vs previous 13F -10,109 shares

    12.25% of the 13F portfolio, value $20,340,771.

    13F-HR 0002043084-26-000003 filed by Mainstream Capital Management 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 412,339 shares
    Change vs previous 13F +2,486 shares

    14% of the 13F portfolio, value $20,868,477.

    13F-HR 0002043084-26-000002 filed by Mainstream Capital Management 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 409,853 shares
    Change vs previous 13F -31,945 shares

    13.57% of the 13F portfolio, value $20,734,463.

    13F-HR 0002043084-26-000001 filed by Mainstream Capital Management 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 441,798 shares
    Change vs previous 13F +7,768 shares

    14.9% of the 13F portfolio, value $22,412,413.

    13F-HR 0002043084-25-000006 filed by Mainstream Capital Management 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 434,030 shares
    Change vs previous 13F +47,940 shares

    16% of the 13F portfolio, value $21,996,640.

    13F-HR 0002043084-25-000004 filed by Mainstream Capital Management 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 386,090 shares
    Change vs previous 13F -94,441 shares

    15.49% of the 13F portfolio, value $19,547,737.

    13F-HR 0002043084-25-000002 filed by Mainstream Capital Management LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  7. period ended2024-12-31
    13F 480,531 shares
    Change vs previous 13F +209,794 shares

    16.97% of the 13F portfolio, value $24,204,346.

    13F-HR 0002043084-25-000001 filed by Mainstream Capital Management LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  8. period ended2024-09-30
    13F 270,737 shares
    Change vs previous 13F not available

    11.68% of the 13F portfolio, value $13,737,195.

    13F-HR 0002043084-24-000002 filed by Mainstream Capital Management LLC
    Filed (acceptance time not in the bulk data set), ingested

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