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BROWN BROTHERS HARRIMAN & CO: AON position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of BROWN BROTHERS HARRIMAN & CO on AON, newest first. How the timeline and the estimate are built.

BROWN BROTHERS HARRIMAN & CO held 7,373 AON shares at 2026-06-30 per its 13F-HR filed 2026-08-12.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 7,373 shares
    Change vs previous 13F +796 shares

    0.01% of the 13F portfolio, value $2,445,550.

    13F-HR 0001104659-26-094581 filed by BROWN BROTHERS HARRIMAN & CO
    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 6,577 shares
    Change vs previous 13F +947 shares

    0.01% of the 13F portfolio, value $2,122,924.

    13F-HR 0001104659-26-060871 filed by BROWN BROTHERS HARRIMAN & CO
    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 5,630 shares
    Change vs previous 13F +1,013 shares

    0.01% of the 13F portfolio, value $1,986,714.

    13F-HR 0001104659-26-014005 filed by BROWN BROTHERS HARRIMAN & CO
    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 4,617 shares
    Change vs previous 13F +484 shares

    0.01% of the 13F portfolio, value $1,646,330.

    13F-HR 0001104659-25-111114 filed by BROWN BROTHERS HARRIMAN & CO
    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 4,133 shares
    Change vs previous 13F +166 shares

    0.01% of the 13F portfolio, value $1,474,489.

    13F-HR 0001104659-25-076057 filed by BROWN BROTHERS HARRIMAN & CO
    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 3,967 shares
    Change vs previous 13F -49 shares

    0.01% of the 13F portfolio, value $1,583,190.

    13F-HR 0001104659-25-048255 filed by BROWN BROTHERS HARRIMAN & CO
    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 4,016 shares
    Change vs previous 13F -11,135 shares

    0.01% of the 13F portfolio, value $1,442,387.

    13F-HR 0001104659-25-011961 filed by BROWN BROTHERS HARRIMAN & CO
    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 15,151 shares
    Change vs previous 13F not available

    0.04% of the 13F portfolio, value $5,242,094.

    13F-HR 0001104659-24-117355 filed by BROWN BROTHERS HARRIMAN & CO
    Filed (acceptance time not in the bulk data set), ingested

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