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Disclosery

BlackRock, Inc.: MBX position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of BlackRock, Inc. on MBX, newest first. How the timeline and the estimate are built.

BlackRock, Inc. held 3,323,672 MBX 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 3,323,672 shares
    Change vs previous 13F +382,266 shares

    <0.01% of the 13F portfolio, value $183,466,695.

    13F-HR 0002012383-26-003238 filed by BlackRock, Inc.
    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 2,941,406 shares
    Change vs previous 13F +21,650 shares

    <0.01% of the 13F portfolio, value $87,800,969.

    13F-HR 0002012383-26-001841 filed by BlackRock, Inc.
    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 2,919,756 shares
    Change vs previous 13F +962,295 shares

    <0.01% of the 13F portfolio, value $92,089,105.

    13F-HR 0002012383-26-000920 filed by BlackRock, Inc.
    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 1,957,461 shares
    Change vs previous 13F +945,915 shares

    <0.01% of the 13F portfolio, value $34,255,569.

    13F-HR 0002012383-25-002949 filed by BlackRock, Inc.
    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 1,011,546 shares
    Change vs previous 13F +228,504 shares

    <0.01% of the 13F portfolio, value $11,541,739.

    13F-HR 0001060021-25-000120 filed by BlackRock, Inc.
    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 783,042 shares
    Change vs previous 13F +55,090 shares

    <0.01% of the 13F portfolio, value $5,778,850.

    13F-HR 0001576419-25-000869 filed by BlackRock, Inc.
    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 727,952 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $13,416,156.

    13F-HR 0001060021-25-000002 filed by BlackRock, Inc.
    Filed (acceptance time not in the bulk data set), ingested

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