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Mesirow Financial Investment Management, Inc.: AON position timeline

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

Mesirow Financial Investment Management, Inc. held 4,859 AON shares at 2026-06-30 per its 13F-HR filed 2026-07-22.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 4,859 shares
    Change vs previous 13F -38 shares

    0.03% of the 13F portfolio, value $1,611,584.

    13F-HR 0001469475-26-000004 filed by Mesirow Financial Investment Management, 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 4,897 shares
    Change vs previous 13F +6 shares

    0.03% of the 13F portfolio, value $1,580,545.

    13F-HR 0001469475-26-000002 filed by Mesirow Financial Investment Management, 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 4,891 shares
    Change vs previous 13F -755 shares

    0.04% of the 13F portfolio, value $1,725,941.

    13F-HR 0001469475-26-000001 filed by Mesirow Financial Investment Management, 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 5,646 shares
    Change vs previous 13F -53 shares

    0.04% of the 13F portfolio, value $2,012,910.

    13F-HR 0001469475-25-000002 filed by Mesirow Financial Investment Management, 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 5,699 shares
    Change vs previous 13F -110 shares

    0.04% of the 13F portfolio, value $2,032,773.

    13F-HR 0001085146-25-004477 filed by Mesirow Financial Investment Management, 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 5,809 shares
    Change vs previous 13F +114 shares

    0.04% of the 13F portfolio, value $2,317,638.

    13F-HR 0001085146-25-002744 filed by Mesirow Financial Investment Management, 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 5,695 shares
    Change vs previous 13F -308 shares

    0.04% of the 13F portfolio, value $2,045,686.

    13F-HR 0001085146-25-000865 filed by Mesirow Financial Investment Management, 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 6,003 shares
    Change vs previous 13F not available

    0.04% of the 13F portfolio, value $2,076,965.

    13F-HR 0001085146-24-005312 filed by Mesirow Financial Investment Management, Inc.
    Filed (acceptance time not in the bulk data set), ingested

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