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Chesley Taft & Associates LLC: JMST position timeline

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

Chesley Taft & Associates LLC held 301,115 JMST 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 301,115 shares
    Change vs previous 13F +15,780 shares

    0.59% of the 13F portfolio, value $15,224,374.

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

  2. period ended2026-06-30
    13F 285,335 shares
    Change vs previous 13F +55,525 shares

    0.57% of the 13F portfolio, value $14,552,085.

    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 229,810 shares
    Change vs previous 13F +28,170 shares

    0.49% of the 13F portfolio, value $11,715,714.

    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 201,640 shares
    Change vs previous 13F +36,350 shares

    0.41% of the 13F portfolio, value $10,271,542.

    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 165,290 shares
    Change vs previous 13F +1,030 shares

    0.36% of the 13F portfolio, value $8,436,402.

    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 164,260 shares
    Change vs previous 13F +31,550 shares

    0.37% of the 13F portfolio, value $8,364,119.

    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 132,710 shares
    Change vs previous 13F +15,600 shares

    0.33% of the 13F portfolio, value $6,748,304.

    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 117,110 shares
    Change vs previous 13F not available

    0.28% of the 13F portfolio, value $5,938,648.

    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).