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GRANDFIELD & DODD, LLC: IONS position timeline

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

GRANDFIELD & DODD, LLC held 37,077 IONS shares at 2026-06-30 per its 13F-HR filed 2026-08-07.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 37,077 shares
    Change vs previous 13F -249 shares

    0.15% of the 13F portfolio, value $2,939,835.

    13F-HR 0001308016-26-000004 filed by GRANDFIELD & DODD, 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 37,326 shares
    Change vs previous 13F -495 shares

    0.16% of the 13F portfolio, value $2,802,809.

    13F-HR 0001308016-26-000002 filed by GRANDFIELD & DODD, 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 37,821 shares
    Change vs previous 13F +146 shares

    0.17% of the 13F portfolio, value $2,992,019.

    13F-HR 0001308016-26-000001 filed by GRANDFIELD & DODD, 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 37,675 shares
    Change vs previous 13F +445 shares

    0.14% of the 13F portfolio, value $2,464,699.

    13F-HR 0001308016-25-000004 filed by GRANDFIELD & DODD, 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 37,230 shares
    Change vs previous 13F -531 shares

    0.09% of the 13F portfolio, value $1,470,957.

    13F-HR 0001085146-25-004722 filed by GRANDFIELD & DODD, 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 37,761 shares
    Change vs previous 13F +1,874 shares

    0.07% of the 13F portfolio, value $1,139,249.

    13F-HR 0001085146-25-002562 filed by GRANDFIELD & DODD, 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 35,887 shares
    Change vs previous 13F +1,074 shares

    0.08% of the 13F portfolio, value $1,254,610.

    13F-HR 0001085146-25-000843 filed by GRANDFIELD & DODD, 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 34,813 shares
    Change vs previous 13F not available

    0.08% of the 13F portfolio, value $1,394,609.

    13F-HR 0001085146-24-005469 filed by GRANDFIELD & DODD, LLC
    Filed (acceptance time not in the bulk data set), ingested

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