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Disclosery

BlackRock, Inc.: MASS position timeline

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

BlackRock, Inc. held 1,944,236 MASS 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 1,944,236 shares
    Change vs previous 13F +176,920 shares

    <0.01% of the 13F portfolio, value $16,914,853.

    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 1,767,316 shares
    Change vs previous 13F -34,456 shares

    <0.01% of the 13F portfolio, value $10,815,974.

    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 1,801,772 shares
    Change vs previous 13F +45,567 shares

    <0.01% of the 13F portfolio, value $9,459,304.

    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 1,756,205 shares
    Change vs previous 13F -34,640 shares

    <0.01% of the 13F portfolio, value $15,384,357.

    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 1,790,845 shares
    Change vs previous 13F +43,861 shares

    <0.01% of the 13F portfolio, value $12,768,726.

    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 1,746,984 shares
    Change vs previous 13F -180,034 shares

    <0.01% of the 13F portfolio, value $7,826,488.

    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 1,927,018 shares
    Change vs previous 13F +42,538 shares

    <0.01% of the 13F portfolio, value $4,239,440.

    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).

  8. period ended2024-09-30
    13F 1,884,480 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $6,539,145.

    13F-HR 0001426459-24-000006 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).