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Tower Research Capital LLC (TRC): SPOK position timeline

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

Tower Research Capital LLC (TRC) held 2,395 SPOK 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 2,395 shares
    Change vs previous 13F -1,773 shares

    <0.01% of the 13F portfolio, value $24,525.

    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 4,168 shares
    Change vs previous 13F +1,466 shares

    <0.01% of the 13F portfolio, value $45,431.

    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 2,702 shares
    Change vs previous 13F +1,607 shares

    <0.01% of the 13F portfolio, value $35,639.

    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 1,095 shares
    Change vs previous 13F -1,679 shares

    <0.01% of the 13F portfolio, value $18,889.

    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 2,774 shares
    Change vs previous 13F +2,113 shares

    <0.01% of the 13F portfolio, value $49,045.

    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 661 shares
    Change vs previous 13F -723 shares

    <0.01% of the 13F portfolio, value $10,866.

    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 1,384 shares
    Change vs previous 13F -7,895 shares

    <0.01% of the 13F portfolio, value $22,213.

    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 9,279 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $139,742.

    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).