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Disclosery

Barton Investment Management: AMT position timeline

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

Barton Investment Management held 77,038 AMT shares at 2026-06-30 per its 13F-HR filed 2026-07-20.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 77,038 shares
    Change vs previous 13F -1,395 shares

    1.71% of the 13F portfolio, value $12,601,106.

    13F-HR 0001387818-26-000003 filed by Barton Investment Management
    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 78,433 shares
    Change vs previous 13F -775 shares

    1.7% of the 13F portfolio, value $13,535,968.

    13F-HR 0001387818-26-000002 filed by Barton Investment Management
    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 79,208 shares
    Change vs previous 13F -1,870 shares

    1.5% of the 13F portfolio, value $13,906,549.

    13F-HR 0001387818-26-000001 filed by Barton Investment Management
    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 81,078 shares
    Change vs previous 13F -1,555 shares

    1.59% of the 13F portfolio, value $15,592,921.

    13F-HR 0001387818-25-000005 filed by Barton Investment Management
    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 82,633 shares
    Change vs previous 13F -2,830 shares

    1.89% of the 13F portfolio, value $18,263,546.

    13F-HR 0001387818-25-000004 filed by Barton Investment Management
    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 85,463 shares
    Change vs previous 13F -1,588 shares

    2.28% of the 13F portfolio, value $18,596,749.

    13F-HR 0001387818-25-000002 filed by Barton Investment Management
    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 87,051 shares
    Change vs previous 13F -1,258 shares

    1.69% of the 13F portfolio, value $15,966,024.

    13F-HR 0001387818-25-000001 filed by Barton Investment Management
    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 88,309 shares
    Change vs previous 13F not available

    2.57% of the 13F portfolio, value $20,537,142.

    13F-HR 0001387818-24-000005 filed by Barton Investment Management
    Filed (acceptance time not in the bulk data set), ingested

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