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Douglass Winthrop Advisors, LLC: AON position timeline

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

Douglass Winthrop Advisors, LLC held 400,635 AON 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 400,635 shares
    Change vs previous 13F +6,099 shares

    2.29% of the 13F portfolio, value $132,886,623.

    13F-HR 0001308527-26-000003 filed by Douglass Winthrop Advisors, LLC
    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 394,536 shares
    Change vs previous 13F +1,921 shares

    2.33% of the 13F portfolio, value $127,348,330.

    13F-HR 0001308527-26-000002 filed by Douglass Winthrop Advisors, 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 392,615 shares
    Change vs previous 13F -9,285 shares

    2.42% of the 13F portfolio, value $138,545,981.

    13F-HR 0001308527-26-000001 filed by Douglass Winthrop Advisors, 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 401,900 shares
    Change vs previous 13F +4,813 shares

    2.5% of the 13F portfolio, value $143,309,502.

    13F-HR 0001308527-25-000007 filed by Douglass Winthrop Advisors, 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 397,087 shares
    Change vs previous 13F +29,387 shares

    2.56% of the 13F portfolio, value $141,664,758.

    13F-HR 0001308527-25-000004 filed by Douglass Winthrop Advisors, 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 367,700 shares
    Change vs previous 13F -4,343 shares

    2.79% of the 13F portfolio, value $146,745,393.

    13F-HR 0001308527-25-000003 filed by Douglass Winthrop Advisors, 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 372,043 shares
    Change vs previous 13F -376 shares

    2.6% of the 13F portfolio, value $133,622,964.

    13F-HR 0001308527-25-000002 filed by Douglass Winthrop Advisors, 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 372,419 shares
    Change vs previous 13F not available

    2.46% of the 13F portfolio, value $128,853,250.

    13F-HR 0001308527-24-000009 filed by Douglass Winthrop Advisors, LLC
    Filed (acceptance time not in the bulk data set), ingested

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