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Quantum Portfolio Management LLC: MDB position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Quantum Portfolio Management LLC on MDB, newest first. How the timeline and the estimate are built.

Quantum Portfolio Management LLC held 1,173 MDB shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 1,173 shares
    Change vs previous 13F +141 shares

    0.14% of the 13F portfolio, value $394,011.

    13F-HR 0001420506-26-001701 filed by Quantum Portfolio Management LLC
    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/A 1,032 shares
    Change vs previous 13F +35 shares

    0.11% of the 13F portfolio, value $252,603.

    13F-HR/A 0001172661-26-001580 filed by Quantum Portfolio Management LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  3. period ended2025-12-31
    13F 997 shares
    Change vs previous 13F -477 shares

    0.18% of the 13F portfolio, value $418,431.

    13F-HR 0001172661-26-000672 filed by Quantum Portfolio Management LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  4. period ended2025-09-30
    13F 1,474 shares
    Change vs previous 13F not available

    0.14% of the 13F portfolio, value $457,500.

    13F-HR 0001172661-25-004476 filed by Quantum Portfolio Management LLC
    Filed (acceptance time not in the bulk data set), ingested

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