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SIMPLEX TRADING, LLC: ALTO position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of SIMPLEX TRADING, LLC on ALTO, newest first. How the timeline and the estimate are built.

SIMPLEX TRADING, LLC held 32,474 ALTO shares at 2026-06-30 per its 13F-HR filed 2026-08-12.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 32,474 shares
    Change vs previous 13F -15,846 shares

    <0.01% of the 13F portfolio, value $185,101.

    13F-HR 0001488542-26-000011 filed by SIMPLEX TRADING, 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 48,320 shares
    Change vs previous 13F +30,053 shares

    0.01% of the 13F portfolio, value $233,868.

    13F-HR 0001488542-26-000009 filed by SIMPLEX TRADING, 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 18,267 shares
    Change vs previous 13F -5,192 shares

    <0.01% of the 13F portfolio, value $52,608.

    13F-HR 0001488542-26-000002 filed by SIMPLEX TRADING, 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 23,459 shares
    Change vs previous 13F +12,628 shares

    <0.01% of the 13F portfolio, value $25,000.

    13F-HR 0001488542-25-000018 filed by SIMPLEX TRADING, 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 10,831 shares
    Change vs previous 13F -5,542 shares

    <0.01% of the 13F portfolio, value $12,000.

    13F-HR 0001488542-25-000010 filed by SIMPLEX TRADING, 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 16,373 shares
    Change vs previous 13F -66,610 shares

    <0.01% of the 13F portfolio, value $18,000.

    13F-HR 0001488542-25-000007 filed by SIMPLEX TRADING, 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 82,983 shares
    Change vs previous 13F -23,545 shares

    <0.01% of the 13F portfolio, value $129,000.

    13F-HR 0001488542-25-000001 filed by SIMPLEX TRADING, 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 106,528 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $171,000.

    13F-HR 0001488542-24-000015 filed by SIMPLEX TRADING, LLC
    Filed (acceptance time not in the bulk data set), ingested

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