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Chesley Taft & Associates LLC: OMC position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Chesley Taft & Associates LLC on OMC, newest first. How the timeline and the estimate are built.

Chesley Taft & Associates LLC held 17,763 OMC shares at 2026-09-30 per its 13F-HR filed 2026-10-13.

the latest 13F is the newest step

  1. period ended2026-09-30
    13F 17,763 shares
    Change vs previous 13F +1,470 shares

    0.05% of the 13F portfolio, value $1,307,890.

    13F-HR 0001164632-26-000006 filed by Chesley Taft & Associates LLC
    Accepted , ingested

  2. period ended2026-06-30
    13F 16,293 shares
    Change vs previous 13F +202 shares

    0.05% of the 13F portfolio, value $1,186,619.

    13F-HR 0001164632-26-000004 filed by Chesley Taft & Associates LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  3. period ended2026-03-31
    13F 16,091 shares
    Change vs previous 13F +1,310 shares

    0.05% of the 13F portfolio, value $1,211,813.

    13F-HR 0001164632-26-000002 filed by Chesley Taft & Associates LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  4. period ended2025-12-31
    13F 14,781 shares
    Change vs previous 13F +621 shares

    0.05% of the 13F portfolio, value $1,193,566.

    13F-HR 0001164632-26-000001 filed by Chesley Taft & Associates LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  5. period ended2025-09-30
    13F 14,160 shares
    Change vs previous 13F -8,022 shares

    0.05% of the 13F portfolio, value $1,154,465.

    13F-HR 0001085146-25-005836 filed by Chesley Taft & Associates LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  6. period ended2025-06-30
    13F 22,182 shares
    Change vs previous 13F -963 shares

    0.07% of the 13F portfolio, value $1,595,773.

    13F-HR 0001085146-25-003693 filed by Chesley Taft & Associates LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  7. period ended2025-03-31
    13F 23,145 shares
    Change vs previous 13F -50 shares

    0.09% of the 13F portfolio, value $1,918,952.

    13F-HR 0001085146-25-002016 filed by Chesley Taft & Associates LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  8. period ended2024-12-31
    13F 23,195 shares
    Change vs previous 13F not available

    0.09% of the 13F portfolio, value $1,995,698.

    13F-HR 0001085146-25-000305 filed by Chesley Taft & Associates LLC
    Filed (acceptance time not in the bulk data set), ingested

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