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SIMPLEX TRADING, LLC: MTSR position timeline

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

SIMPLEX TRADING, LLC held 0 MTSR shares at 2025-12-31 per its 13F-HR filed 2026-02-11.

the latest 13F is the newest step

  1. period ended2025-12-31
    13F 0 shares
    Change vs previous 13F -9,114 shares

    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).

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

  2. period ended2025-09-30
    13F 9,114 shares
    Change vs previous 13F +3,316 shares

    0.01% of the 13F portfolio, value $476,000.

    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).

  3. period ended2025-06-30
    13F 5,798 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $164,000.

    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).