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OSTRUM ASSET MANAGEMENT: BRK-B position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of OSTRUM ASSET MANAGEMENT on BRK-B, newest first. How the timeline and the estimate are built.

OSTRUM ASSET MANAGEMENT held 55,291 BRK-B shares at 2026-06-30 per its 13F-HR filed 2026-08-13.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 55,291 shares
    Change vs previous 13F -1,039 shares

    1.33% of the 13F portfolio, value $27,667,063.

    13F-HR 0001104659-26-095882 filed by OSTRUM ASSET 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 56,330 shares
    Change vs previous 13F -16,909 shares

    1.52% of the 13F portfolio, value $26,993,336.

    13F-HR 0001104659-26-061164 filed by OSTRUM ASSET 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 73,239 shares
    Change vs previous 13F +13,556 shares

    1.77% of the 13F portfolio, value $36,813,583.

    13F-HR 0001104659-26-015183 filed by OSTRUM ASSET 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 59,683 shares
    Change vs previous 13F -31,023 shares

    1.35% of the 13F portfolio, value $30,005,031.

    13F-HR 0001104659-25-111991 filed by OSTRUM ASSET 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 90,706 shares
    Change vs previous 13F -550 shares

    2.06% of the 13F portfolio, value $44,062,254.

    13F-HR 0001104659-25-077550 filed by OSTRUM ASSET 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 91,256 shares
    Change vs previous 13F +81,385 shares

    2.56% of the 13F portfolio, value $48,601,120.

    13F-HR 0001104659-25-048517 filed by OSTRUM ASSET 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 9,871 shares
    Change vs previous 13F +2,128 shares

    0.39% of the 13F portfolio, value $4,474,327.

    13F-HR 0001104659-25-012937 filed by OSTRUM ASSET 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 7,743 shares
    Change vs previous 13F not available

    0.29% of the 13F portfolio, value $3,563,793.

    13F-HR 0001104659-24-117692 filed by OSTRUM ASSET MANAGEMENT
    Filed (acceptance time not in the bulk data set), ingested

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