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Disclosery

SIMPLEX TRADING, LLC: MASI position timeline

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

SIMPLEX TRADING, LLC held 0 MASI shares at 2025-09-30 per its 13F-HR filed 2025-11-12.

the latest 13F is the newest step

  1. period ended2025-09-30
    13F 0 shares
    Change vs previous 13F -98 shares

    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).

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

  2. period ended2025-06-30
    13F 98 shares
    Change vs previous 13F -2,240 shares

    <0.01% of the 13F portfolio, value $16,000.

    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).

  3. period ended2025-03-31
    13F 2,338 shares
    Change vs previous 13F +1,513 shares

    0.01% of the 13F portfolio, value $389,000.

    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).

  4. period ended2024-12-31
    13F 825 shares
    Change vs previous 13F -11,704 shares

    <0.01% of the 13F portfolio, value $136,000.

    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).

  5. period ended2024-09-30
    13F 12,529 shares
    Change vs previous 13F not available

    0.06% of the 13F portfolio, value $1,670,000.

    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).