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Disclosery

GM Advisory Group, LLC: MASS position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of GM Advisory Group, LLC on MASS, newest first. How the timeline and the estimate are built.

GM Advisory Group, LLC held 238,218 MASS shares at 2026-03-31 per its 13F-HR filed 2026-04-28.

the latest 13F is the newest step

  1. period ended2026-03-31
    13F 238,218 shares
    Change vs previous 13F -40,574 shares

    0.06% of the 13F portfolio, value $1,457,894.

    13F-HR 0001598304-26-000002 filed by GM Advisory Group, LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  2. period ended2025-12-31
    13F 278,792 shares
    Change vs previous 13F -399,294 shares

    0.06% of the 13F portfolio, value $1,463,658.

    13F-HR 0001598304-26-000001 filed by GM Advisory Group, LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  3. period ended2025-09-30
    13F 678,086 shares
    Change vs previous 13F -487,205 shares

    0.25% of the 13F portfolio, value $5,940,033.

    13F-HR 0001598304-25-000003 filed by GM Advisory Group, LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  4. period ended2025-06-30
    13F 1,165,291 shares
    Change vs previous 13F not available

    0.41% of the 13F portfolio, value $8,308,525.

    13F-HR 0001085146-25-004951 filed by GM Advisory Group, LLC
    Filed (acceptance time not in the bulk data set), ingested

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