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Disclosery

Sigma Planning Corp: AMT position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Sigma Planning Corp on AMT, newest first. How the timeline and the estimate are built.

Sigma Planning Corp held 2,435 AMT shares at 2026-06-30 per its 13F-HR filed 2026-08-07.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 2,435 shares
    Change vs previous 13F +156 shares

    0.01% of the 13F portfolio, value $398,367.

    13F-HR 0001420506-26-001464 filed by Sigma Planning Corp
    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 2,279 shares
    Change vs previous 13F -164 shares

    0.01% of the 13F portfolio, value $393,303.

    13F-HR 0001420506-26-000793 filed by Sigma Planning Corp
    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 2,443 shares
    Change vs previous 13F -242 shares

    0.01% of the 13F portfolio, value $403,053.

    13F-HR 0001420506-26-000121 filed by Sigma Planning Corp
    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 2,685 shares
    Change vs previous 13F -339 shares

    0.01% of the 13F portfolio, value $516,483.

    13F-HR 0001420506-25-003053 filed by Sigma Planning Corp
    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 3,024 shares
    Change vs previous 13F -1,682 shares

    0.02% of the 13F portfolio, value $668,410.

    13F-HR 0001420506-25-001700 filed by Sigma Planning Corp
    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 4,706 shares
    Change vs previous 13F -2,657 shares

    0.03% of the 13F portfolio, value $1,024,122.

    13F-HR 0001420506-25-000852 filed by Sigma Planning Corp
    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 7,363 shares
    Change vs previous 13F +514 shares

    0.04% of the 13F portfolio, value $1,350,359.

    13F-HR 0001420506-25-000109 filed by Sigma Planning Corp
    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 6,849 shares
    Change vs previous 13F not available

    0.05% of the 13F portfolio, value $1,592,901.

    13F-HR 0001420506-24-002196 filed by Sigma Planning Corp
    Filed (acceptance time not in the bulk data set), ingested

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