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Chesley Taft & Associates LLC: MRK position timeline

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

Chesley Taft & Associates LLC held 55,613 MRK 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 55,613 shares
    Change vs previous 13F -197 shares

    0.32% of the 13F portfolio, value $8,081,125.

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

  2. period ended2026-06-30
    13F 55,810 shares
    Change vs previous 13F -3,023 shares

    0.28% of the 13F portfolio, value $7,171,585.

    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 58,833 shares
    Change vs previous 13F -1,652 shares

    0.3% of the 13F portfolio, value $7,077,022.

    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 60,485 shares
    Change vs previous 13F +5,213 shares

    0.25% of the 13F portfolio, value $6,366,651.

    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 55,272 shares
    Change vs previous 13F -3,126 shares

    0.2% of the 13F portfolio, value $4,638,979.

    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 58,398 shares
    Change vs previous 13F -2,490 shares

    0.21% of the 13F portfolio, value $4,622,786.

    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 60,888 shares
    Change vs previous 13F +35 shares

    0.26% of the 13F portfolio, value $5,465,307.

    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 60,853 shares
    Change vs previous 13F not available

    0.28% of the 13F portfolio, value $6,053,656.

    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).