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SIMPLEX TRADING, LLC: IRDM position timeline

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

SIMPLEX TRADING, LLC held 15,833 IRDM 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 15,833 shares
    Change vs previous 13F +12,736 shares

    0.02% of the 13F portfolio, value $868,440.

    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 3,097 shares
    Change vs previous 13F -5,690 shares

    <0.01% of the 13F portfolio, value $85,910.

    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 8,787 shares
    Change vs previous 13F -6,729 shares

    <0.01% of the 13F portfolio, value $152,718.

    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 15,516 shares
    Change vs previous 13F +15,516 shares

    0.01% of the 13F portfolio, value $270,000.

    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 ended2024-12-31
    13F 0 shares
    Change vs previous 13F -22,903 shares

    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).

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

  6. period ended2024-09-30
    13F 22,903 shares
    Change vs previous 13F not available

    0.02% of the 13F portfolio, value $697,000.

    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).