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Tower Research Capital LLC (TRC): IRDM position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Tower Research Capital LLC (TRC) on IRDM, newest first. How the timeline and the estimate are built.

Tower Research Capital LLC (TRC) held 346 IRDM shares at 2026-06-30 per its 13F-HR filed 2026-08-11.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 346 shares
    Change vs previous 13F -4,865 shares

    <0.01% of the 13F portfolio, value $18,978.

    13F-HR 0001533421-26-000008 filed by Tower Research Capital LLC (TRC)
    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 5,211 shares
    Change vs previous 13F -13,260 shares

    <0.01% of the 13F portfolio, value $144,553.

    13F-HR 0001533421-26-000006 filed by Tower Research Capital LLC (TRC)
    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 18,471 shares
    Change vs previous 13F -56,452 shares

    0.01% of the 13F portfolio, value $321,026.

    13F-HR 0001533421-26-000004 filed by Tower Research Capital LLC (TRC)
    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 74,923 shares
    Change vs previous 13F +60,832 shares

    0.04% of the 13F portfolio, value $1,308,156.

    13F-HR 0001533421-25-000019 filed by Tower Research Capital LLC (TRC)
    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 14,091 shares
    Change vs previous 13F +7,243 shares

    0.01% of the 13F portfolio, value $425,126.

    13F-HR 0001533421-25-000013 filed by Tower Research Capital LLC (TRC)
    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 6,848 shares
    Change vs previous 13F -1,517 shares

    0.01% of the 13F portfolio, value $187,429.

    13F-HR 0001533421-25-000007 filed by Tower Research Capital LLC (TRC)
    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 8,365 shares
    Change vs previous 13F +3,949 shares

    <0.01% of the 13F portfolio, value $242,752.

    13F-HR 0001533421-25-000001 filed by Tower Research Capital LLC (TRC)
    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 4,416 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $134,467.

    13F-HR 0001533421-24-000021 filed by Tower Research Capital LLC (TRC)
    Filed (acceptance time not in the bulk data set), ingested

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