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Disclosery

Cantillon Capital Management LLC: AON position timeline

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

Cantillon Capital Management LLC held 0 AON shares at 2026-06-30 per its 13F-HR filed 2026-07-29.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 0 shares
    Change vs previous 13F -1,095,574 shares

    13F-HR 0001279936-26-000005 filed by Cantillon Capital Management LLC
    Filed (acceptance time not in the bulk data set), ingested

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

    Exited: the 13F for this period no longer lists the position.

  2. period ended2026-03-31
    13F 1,095,574 shares
    Change vs previous 13F -147,444 shares

    2.35% of the 13F portfolio, value $353,629,376.

    13F-HR 0001279936-26-000004 filed by Cantillon Capital 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 1,243,018 shares
    Change vs previous 13F +9,277 shares

    2.37% of the 13F portfolio, value $438,636,192.

    13F-HR 0001279936-26-000001 filed by Cantillon Capital 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/A 1,233,741 shares
    Change vs previous 13F -13,613 shares

    2.42% of the 13F portfolio, value $439,927,366.

    13F-HR/A 0000899140-26-000221 filed by Cantillon Capital Management LLC
    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/A 1,247,354 shares
    Change vs previous 13F -36,194 shares

    2.57% of the 13F portfolio, value $445,006,013.

    13F-HR/A 0000899140-26-000220 filed by Cantillon Capital Management LLC
    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/A 1,283,548 shares
    Change vs previous 13F -39,680 shares

    3.32% of the 13F portfolio, value $512,251,171.

    13F-HR/A 0000899140-26-000219 filed by Cantillon Capital Management LLC
    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 1,323,228 shares
    Change vs previous 13F +7,010 shares

    2.87% of the 13F portfolio, value $475,250,568.

    13F-HR 0001085146-25-000819 filed by Cantillon Capital Management LLC
    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 1,316,218 shares
    Change vs previous 13F not available

    2.78% of the 13F portfolio, value $455,398,266.

    13F-HR 0001085146-24-005445 filed by Cantillon Capital Management LLC
    Filed (acceptance time not in the bulk data set), ingested

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